drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright 2016 Microsemi Corporation
   4  *    Copyright 2014-2015 PMC-Sierra, Inc.
   5  *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; version 2 of the License.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  14  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  15  *
  16  *    Questions/Comments/Bugfixes to esc.storagedev@microsemi.com
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/types.h>
  23 #include <linux/pci.h>
  24 #include <linux/pci-aspm.h>
  25 #include <linux/kernel.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/timer.h>
  30 #include <linux/init.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/compat.h>
  33 #include <linux/blktrace_api.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/io.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/completion.h>
  38 #include <linux/moduleparam.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_tcq.h>
  44 #include <scsi/scsi_eh.h>
  45 #include <scsi/scsi_transport_sas.h>
  46 #include <scsi/scsi_dbg.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <linux/atomic.h>
  51 #include <linux/jiffies.h>
  52 #include <linux/percpu-defs.h>
  53 #include <linux/percpu.h>
  54 #include <asm/unaligned.h>
  55 #include <asm/div64.h>
  56 #include "hpsa_cmd.h"
  57 #include "hpsa.h"
  58
  59 /*
  60  * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
  61  * with an optional trailing '-' followed by a byte value (0-255).
  62  */
  63 #define HPSA_DRIVER_VERSION "3.4.16-0"
  64 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  65 #define HPSA "hpsa"
  66
  67 /* How long to wait for CISS doorbell communication */
  68 #define CLEAR_EVENT_WAIT_INTERVAL 20    /* ms for each msleep() call */
  69 #define MODE_CHANGE_WAIT_INTERVAL 10    /* ms for each msleep() call */
  70 #define MAX_CLEAR_EVENT_WAIT 30000      /* times 20 ms = 600 s */
  71 #define MAX_MODE_CHANGE_WAIT 2000       /* times 10 ms = 20 s */
  72 #define MAX_IOCTL_CONFIG_WAIT 1000
  73
  74 /*define how many times we will try a command because of bus resets */
  75 #define MAX_CMD_RETRIES 3
  76
  77 /* Embedded module documentation macros - see modules.h */
  78 MODULE_AUTHOR("Hewlett-Packard Company");
  79 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  80         HPSA_DRIVER_VERSION);
  81 MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
  82 MODULE_VERSION(HPSA_DRIVER_VERSION);
  83 MODULE_LICENSE("GPL");
  84
  85 static int hpsa_allow_any;
  86 module_param(hpsa_allow_any, int, S_IRUGO|S_IWUSR);
  87 MODULE_PARM_DESC(hpsa_allow_any,
  88                 "Allow hpsa driver to access unknown HP Smart Array hardware");
  89 static int hpsa_simple_mode;
  90 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  91 MODULE_PARM_DESC(hpsa_simple_mode,
  92         "Use 'simple mode' rather than 'performant mode'");
  93
  94 /* define the PCI info for the cards we can control */
  95 static const struct pci_device_id hpsa_pci_device_id[] = {
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  99         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
 100         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
 101         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
 102         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
 103         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
 104         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
 105         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
 106         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
 107         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
 108         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
 109         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 110         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 111         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 112         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 113         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 114         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 115         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 116         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 117         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
 118         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
 119         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
 120         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
 121         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
 122         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
 123         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
 124         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
 125         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
 126         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
 127         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
 128         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
 129         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
 130         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
 131         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
 132         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
 133         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
 134         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
 135         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
 136         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
 137         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
 138         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
 139         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
 140         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
 141         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
 142         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
 143         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
 144         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
 145         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
 146         {PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
 147         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 148                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 149         {0,}
 150 };
 151
 152 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 153
 154 /*  board_id = Subsystem Device ID & Vendor ID
 155  *  product = Marketing Name for the board
 156  *  access = Address of the struct of function pointers
 157  */
 158 static struct board_type products[] = {
 159         {0x3241103C, "Smart Array P212", &SA5_access},
 160         {0x3243103C, "Smart Array P410", &SA5_access},
 161         {0x3245103C, "Smart Array P410i", &SA5_access},
 162         {0x3247103C, "Smart Array P411", &SA5_access},
 163         {0x3249103C, "Smart Array P812", &SA5_access},
 164         {0x324A103C, "Smart Array P712m", &SA5_access},
 165         {0x324B103C, "Smart Array P711m", &SA5_access},
 166         {0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
 167         {0x3350103C, "Smart Array P222", &SA5_access},
 168         {0x3351103C, "Smart Array P420", &SA5_access},
 169         {0x3352103C, "Smart Array P421", &SA5_access},
 170         {0x3353103C, "Smart Array P822", &SA5_access},
 171         {0x3354103C, "Smart Array P420i", &SA5_access},
 172         {0x3355103C, "Smart Array P220i", &SA5_access},
 173         {0x3356103C, "Smart Array P721m", &SA5_access},
 174         {0x1921103C, "Smart Array P830i", &SA5_access},
 175         {0x1922103C, "Smart Array P430", &SA5_access},
 176         {0x1923103C, "Smart Array P431", &SA5_access},
 177         {0x1924103C, "Smart Array P830", &SA5_access},
 178         {0x1926103C, "Smart Array P731m", &SA5_access},
 179         {0x1928103C, "Smart Array P230i", &SA5_access},
 180         {0x1929103C, "Smart Array P530", &SA5_access},
 181         {0x21BD103C, "Smart Array P244br", &SA5_access},
 182         {0x21BE103C, "Smart Array P741m", &SA5_access},
 183         {0x21BF103C, "Smart HBA H240ar", &SA5_access},
 184         {0x21C0103C, "Smart Array P440ar", &SA5_access},
 185         {0x21C1103C, "Smart Array P840ar", &SA5_access},
 186         {0x21C2103C, "Smart Array P440", &SA5_access},
 187         {0x21C3103C, "Smart Array P441", &SA5_access},
 188         {0x21C4103C, "Smart Array", &SA5_access},
 189         {0x21C5103C, "Smart Array P841", &SA5_access},
 190         {0x21C6103C, "Smart HBA H244br", &SA5_access},
 191         {0x21C7103C, "Smart HBA H240", &SA5_access},
 192         {0x21C8103C, "Smart HBA H241", &SA5_access},
 193         {0x21C9103C, "Smart Array", &SA5_access},
 194         {0x21CA103C, "Smart Array P246br", &SA5_access},
 195         {0x21CB103C, "Smart Array P840", &SA5_access},
 196         {0x21CC103C, "Smart Array", &SA5_access},
 197         {0x21CD103C, "Smart Array", &SA5_access},
 198         {0x21CE103C, "Smart HBA", &SA5_access},
 199         {0x05809005, "SmartHBA-SA", &SA5_access},
 200         {0x05819005, "SmartHBA-SA 8i", &SA5_access},
 201         {0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
 202         {0x05839005, "SmartHBA-SA 8e", &SA5_access},
 203         {0x05849005, "SmartHBA-SA 16i", &SA5_access},
 204         {0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
 205         {0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
 206         {0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
 207         {0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
 208         {0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
 209         {0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
 210         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 211 };
 212
 213 static struct scsi_transport_template *hpsa_sas_transport_template;
 214 static int hpsa_add_sas_host(struct ctlr_info *h);
 215 static void hpsa_delete_sas_host(struct ctlr_info *h);
 216 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
 217                         struct hpsa_scsi_dev_t *device);
 218 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
 219 static struct hpsa_scsi_dev_t
 220         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
 221                 struct sas_rphy *rphy);
 222
 223 #define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
 224 static const struct scsi_cmnd hpsa_cmd_busy;
 225 #define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
 226 static const struct scsi_cmnd hpsa_cmd_idle;
 227 static int number_of_controllers;
 228
 229 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 230 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 231 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg);
 232
 233 #ifdef CONFIG_COMPAT
 234 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd,
 235         void __user *arg);
 236 #endif
 237
 238 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 239 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 240 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
 241 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
 242                                             struct scsi_cmnd *scmd);
 243 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 244         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
 245         int cmd_type);
 246 static void hpsa_free_cmd_pool(struct ctlr_info *h);
 247 #define VPD_PAGE (1 << 8)
 248 #define HPSA_SIMPLE_ERROR_BITS 0x03
 249
 250 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 251 static void hpsa_scan_start(struct Scsi_Host *);
 252 static int hpsa_scan_finished(struct Scsi_Host *sh,
 253         unsigned long elapsed_time);
 254 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
 255
 256 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 257 static int hpsa_eh_abort_handler(struct scsi_cmnd *scsicmd);
 258 static int hpsa_slave_alloc(struct scsi_device *sdev);
 259 static int hpsa_slave_configure(struct scsi_device *sdev);
 260 static void hpsa_slave_destroy(struct scsi_device *sdev);
 261
 262 static void hpsa_update_scsi_devices(struct ctlr_info *h);
 263 static int check_for_unit_attention(struct ctlr_info *h,
 264         struct CommandList *c);
 265 static void check_ioctl_unit_attention(struct ctlr_info *h,
 266         struct CommandList *c);
 267 /* performant mode helper functions */
 268 static void calc_bucket_map(int *bucket, int num_buckets,
 269         int nsgs, int min_blocks, u32 *bucket_map);
 270 static void hpsa_free_performant_mode(struct ctlr_info *h);
 271 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 272 static inline u32 next_command(struct ctlr_info *h, u8 q);
 273 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 274                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 275                                u64 *cfg_offset);
 276 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 277                                     unsigned long *memory_bar);
 278 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id);
 279 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 280                                      int wait_for_ready);
 281 static inline void finish_cmd(struct CommandList *c);
 282 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
 283 #define BOARD_NOT_READY 0
 284 #define BOARD_READY 1
 285 static void hpsa_drain_accel_commands(struct ctlr_info *h);
 286 static void hpsa_flush_cache(struct ctlr_info *h);
 287 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
 288         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
 289         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
 290 static void hpsa_command_resubmit_worker(struct work_struct *work);
 291 static u32 lockup_detected(struct ctlr_info *h);
 292 static int detect_controller_lockup(struct ctlr_info *h);
 293 static void hpsa_disable_rld_caching(struct ctlr_info *h);
 294 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
 295         struct ReportExtendedLUNdata *buf, int bufsize);
 296 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
 297         unsigned char scsi3addr[], u8 page);
 298 static int hpsa_luns_changed(struct ctlr_info *h);
 299 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
 300                                struct hpsa_scsi_dev_t *dev,
 301                                unsigned char *scsi3addr);
 302
 303 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 304 {
 305         unsigned long *priv = shost_priv(sdev->host);
 306         return (struct ctlr_info *) *priv;
 307 }
 308
 309 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 310 {
 311         unsigned long *priv = shost_priv(sh);
 312         return (struct ctlr_info *) *priv;
 313 }
 314
 315 static inline bool hpsa_is_cmd_idle(struct CommandList *c)
 316 {
 317         return c->scsi_cmd == SCSI_CMD_IDLE;
 318 }
 319
 320 static inline bool hpsa_is_pending_event(struct CommandList *c)
 321 {
 322         return c->abort_pending || c->reset_pending;
 323 }
 324
 325 /* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
 326 static void decode_sense_data(const u8 *sense_data, int sense_data_len,
 327                         u8 *sense_key, u8 *asc, u8 *ascq)
 328 {
 329         struct scsi_sense_hdr sshdr;
 330         bool rc;
 331
 332         *sense_key = -1;
 333         *asc = -1;
 334         *ascq = -1;
 335
 336         if (sense_data_len < 1)
 337                 return;
 338
 339         rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
 340         if (rc) {
 341                 *sense_key = sshdr.sense_key;
 342                 *asc = sshdr.asc;
 343                 *ascq = sshdr.ascq;
 344         }
 345 }
 346
 347 static int check_for_unit_attention(struct ctlr_info *h,
 348         struct CommandList *c)
 349 {
 350         u8 sense_key, asc, ascq;
 351         int sense_len;
 352
 353         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
 354                 sense_len = sizeof(c->err_info->SenseInfo);
 355         else
 356                 sense_len = c->err_info->SenseLen;
 357
 358         decode_sense_data(c->err_info->SenseInfo, sense_len,
 359                                 &sense_key, &asc, &ascq);
 360         if (sense_key != UNIT_ATTENTION || asc == 0xff)
 361                 return 0;
 362
 363         switch (asc) {
 364         case STATE_CHANGED:
 365                 dev_warn(&h->pdev->dev,
 366                         "%s: a state change detected, command retried\n",
 367                         h->devname);
 368                 break;
 369         case LUN_FAILED:
 370                 dev_warn(&h->pdev->dev,
 371                         "%s: LUN failure detected\n", h->devname);
 372                 break;
 373         case REPORT_LUNS_CHANGED:
 374                 dev_warn(&h->pdev->dev,
 375                         "%s: report LUN data changed\n", h->devname);
 376         /*
 377          * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 378          * target (array) devices.
 379          */
 380                 break;
 381         case POWER_OR_RESET:
 382                 dev_warn(&h->pdev->dev,
 383                         "%s: a power on or device reset detected\n",
 384                         h->devname);
 385                 break;
 386         case UNIT_ATTENTION_CLEARED:
 387                 dev_warn(&h->pdev->dev,
 388                         "%s: unit attention cleared by another initiator\n",
 389                         h->devname);
 390                 break;
 391         default:
 392                 dev_warn(&h->pdev->dev,
 393                         "%s: unknown unit attention detected\n",
 394                         h->devname);
 395                 break;
 396         }
 397         return 1;
 398 }
 399
 400 static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 401 {
 402         if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 403                 (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 404                  c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 405                 return 0;
 406         dev_warn(&h->pdev->dev, HPSA "device busy");
 407         return 1;
 408 }
 409
 410 static u32 lockup_detected(struct ctlr_info *h);
 411 static ssize_t host_show_lockup_detected(struct device *dev,
 412                 struct device_attribute *attr, char *buf)
 413 {
 414         int ld;
 415         struct ctlr_info *h;
 416         struct Scsi_Host *shost = class_to_shost(dev);
 417
 418         h = shost_to_hba(shost);
 419         ld = lockup_detected(h);
 420
 421         return sprintf(buf, "ld=%d\n", ld);
 422 }
 423
 424 static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
 425                                          struct device_attribute *attr,
 426                                          const char *buf, size_t count)
 427 {
 428         int status, len;
 429         struct ctlr_info *h;
 430         struct Scsi_Host *shost = class_to_shost(dev);
 431         char tmpbuf[10];
 432
 433         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 434                 return -EACCES;
 435         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 436         strncpy(tmpbuf, buf, len);
 437         tmpbuf[len] = '\0';
 438         if (sscanf(tmpbuf, "%d", &status) != 1)
 439                 return -EINVAL;
 440         h = shost_to_hba(shost);
 441         h->acciopath_status = !!status;
 442         dev_warn(&h->pdev->dev,
 443                 "hpsa: HP SSD Smart Path %s via sysfs update.\n",
 444                 h->acciopath_status ? "enabled" : "disabled");
 445         return count;
 446 }
 447
 448 static ssize_t host_store_raid_offload_debug(struct device *dev,
 449                                          struct device_attribute *attr,
 450                                          const char *buf, size_t count)
 451 {
 452         int debug_level, len;
 453         struct ctlr_info *h;
 454         struct Scsi_Host *shost = class_to_shost(dev);
 455         char tmpbuf[10];
 456
 457         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 458                 return -EACCES;
 459         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 460         strncpy(tmpbuf, buf, len);
 461         tmpbuf[len] = '\0';
 462         if (sscanf(tmpbuf, "%d", &debug_level) != 1)
 463                 return -EINVAL;
 464         if (debug_level < 0)
 465                 debug_level = 0;
 466         h = shost_to_hba(shost);
 467         h->raid_offload_debug = debug_level;
 468         dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
 469                 h->raid_offload_debug);
 470         return count;
 471 }
 472
 473 static ssize_t host_store_rescan(struct device *dev,
 474                                  struct device_attribute *attr,
 475                                  const char *buf, size_t count)
 476 {
 477         struct ctlr_info *h;
 478         struct Scsi_Host *shost = class_to_shost(dev);
 479         h = shost_to_hba(shost);
 480         hpsa_scan_start(h->scsi_host);
 481         return count;
 482 }
 483
 484 static ssize_t host_show_firmware_revision(struct device *dev,
 485              struct device_attribute *attr, char *buf)
 486 {
 487         struct ctlr_info *h;
 488         struct Scsi_Host *shost = class_to_shost(dev);
 489         unsigned char *fwrev;
 490
 491         h = shost_to_hba(shost);
 492         if (!h->hba_inquiry_data)
 493                 return 0;
 494         fwrev = &h->hba_inquiry_data[32];
 495         return snprintf(buf, 20, "%c%c%c%c\n",
 496                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 497 }
 498
 499 static ssize_t host_show_commands_outstanding(struct device *dev,
 500              struct device_attribute *attr, char *buf)
 501 {
 502         struct Scsi_Host *shost = class_to_shost(dev);
 503         struct ctlr_info *h = shost_to_hba(shost);
 504
 505         return snprintf(buf, 20, "%d\n",
 506                         atomic_read(&h->commands_outstanding));
 507 }
 508
 509 static ssize_t host_show_transport_mode(struct device *dev,
 510         struct device_attribute *attr, char *buf)
 511 {
 512         struct ctlr_info *h;
 513         struct Scsi_Host *shost = class_to_shost(dev);
 514
 515         h = shost_to_hba(shost);
 516         return snprintf(buf, 20, "%s\n",
 517                 h->transMethod & CFGTBL_Trans_Performant ?
 518                         "performant" : "simple");
 519 }
 520
 521 static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
 522         struct device_attribute *attr, char *buf)
 523 {
 524         struct ctlr_info *h;
 525         struct Scsi_Host *shost = class_to_shost(dev);
 526
 527         h = shost_to_hba(shost);
 528         return snprintf(buf, 30, "HP SSD Smart Path %s\n",
 529                 (h->acciopath_status == 1) ?  "enabled" : "disabled");
 530 }
 531
 532 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 533 static u32 unresettable_controller[] = {
 534         0x324a103C, /* Smart Array P712m */
 535         0x324b103C, /* Smart Array P711m */
 536         0x3223103C, /* Smart Array P800 */
 537         0x3234103C, /* Smart Array P400 */
 538         0x3235103C, /* Smart Array P400i */
 539         0x3211103C, /* Smart Array E200i */
 540         0x3212103C, /* Smart Array E200 */
 541         0x3213103C, /* Smart Array E200i */
 542         0x3214103C, /* Smart Array E200i */
 543         0x3215103C, /* Smart Array E200i */
 544         0x3237103C, /* Smart Array E500 */
 545         0x323D103C, /* Smart Array P700m */
 546         0x40800E11, /* Smart Array 5i */
 547         0x409C0E11, /* Smart Array 6400 */
 548         0x409D0E11, /* Smart Array 6400 EM */
 549         0x40700E11, /* Smart Array 5300 */
 550         0x40820E11, /* Smart Array 532 */
 551         0x40830E11, /* Smart Array 5312 */
 552         0x409A0E11, /* Smart Array 641 */
 553         0x409B0E11, /* Smart Array 642 */
 554         0x40910E11, /* Smart Array 6i */
 555 };
 556
 557 /* List of controllers which cannot even be soft reset */
 558 static u32 soft_unresettable_controller[] = {
 559         0x40800E11, /* Smart Array 5i */
 560         0x40700E11, /* Smart Array 5300 */
 561         0x40820E11, /* Smart Array 532 */
 562         0x40830E11, /* Smart Array 5312 */
 563         0x409A0E11, /* Smart Array 641 */
 564         0x409B0E11, /* Smart Array 642 */
 565         0x40910E11, /* Smart Array 6i */
 566         /* Exclude 640x boards.  These are two pci devices in one slot
 567          * which share a battery backed cache module.  One controls the
 568          * cache, the other accesses the cache through the one that controls
 569          * it.  If we reset the one controlling the cache, the other will
 570          * likely not be happy.  Just forbid resetting this conjoined mess.
 571          * The 640x isn't really supported by hpsa anyway.
 572          */
 573         0x409C0E11, /* Smart Array 6400 */
 574         0x409D0E11, /* Smart Array 6400 EM */
 575 };
 576
 577 static u32 needs_abort_tags_swizzled[] = {
 578         0x323D103C, /* Smart Array P700m */
 579         0x324a103C, /* Smart Array P712m */
 580         0x324b103C, /* SmartArray P711m */
 581 };
 582
 583 static int board_id_in_array(u32 a[], int nelems, u32 board_id)
 584 {
 585         int i;
 586
 587         for (i = 0; i < nelems; i++)
 588                 if (a[i] == board_id)
 589                         return 1;
 590         return 0;
 591 }
 592
 593 static int ctlr_is_hard_resettable(u32 board_id)
 594 {
 595         return !board_id_in_array(unresettable_controller,
 596                         ARRAY_SIZE(unresettable_controller), board_id);
 597 }
 598
 599 static int ctlr_is_soft_resettable(u32 board_id)
 600 {
 601         return !board_id_in_array(soft_unresettable_controller,
 602                         ARRAY_SIZE(soft_unresettable_controller), board_id);
 603 }
 604
 605 static int ctlr_is_resettable(u32 board_id)
 606 {
 607         return ctlr_is_hard_resettable(board_id) ||
 608                 ctlr_is_soft_resettable(board_id);
 609 }
 610
 611 static int ctlr_needs_abort_tags_swizzled(u32 board_id)
 612 {
 613         return board_id_in_array(needs_abort_tags_swizzled,
 614                         ARRAY_SIZE(needs_abort_tags_swizzled), board_id);
 615 }
 616
 617 static ssize_t host_show_resettable(struct device *dev,
 618         struct device_attribute *attr, char *buf)
 619 {
 620         struct ctlr_info *h;
 621         struct Scsi_Host *shost = class_to_shost(dev);
 622
 623         h = shost_to_hba(shost);
 624         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 625 }
 626
 627 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 628 {
 629         return (scsi3addr[3] & 0xC0) == 0x40;
 630 }
 631
 632 static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
 633         "1(+0)ADM", "UNKNOWN", "PHYS DRV"
 634 };
 635 #define HPSA_RAID_0     0
 636 #define HPSA_RAID_4     1
 637 #define HPSA_RAID_1     2       /* also used for RAID 10 */
 638 #define HPSA_RAID_5     3       /* also used for RAID 50 */
 639 #define HPSA_RAID_51    4
 640 #define HPSA_RAID_6     5       /* also used for RAID 60 */
 641 #define HPSA_RAID_ADM   6       /* also used for RAID 1+0 ADM */
 642 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
 643 #define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
 644
 645 static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
 646 {
 647         return !device->physical_device;
 648 }
 649
 650 static ssize_t raid_level_show(struct device *dev,
 651              struct device_attribute *attr, char *buf)
 652 {
 653         ssize_t l = 0;
 654         unsigned char rlevel;
 655         struct ctlr_info *h;
 656         struct scsi_device *sdev;
 657         struct hpsa_scsi_dev_t *hdev;
 658         unsigned long flags;
 659
 660         sdev = to_scsi_device(dev);
 661         h = sdev_to_hba(sdev);
 662         spin_lock_irqsave(&h->lock, flags);
 663         hdev = sdev->hostdata;
 664         if (!hdev) {
 665                 spin_unlock_irqrestore(&h->lock, flags);
 666                 return -ENODEV;
 667         }
 668
 669         /* Is this even a logical drive? */
 670         if (!is_logical_device(hdev)) {
 671                 spin_unlock_irqrestore(&h->lock, flags);
 672                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 673                 return l;
 674         }
 675
 676         rlevel = hdev->raid_level;
 677         spin_unlock_irqrestore(&h->lock, flags);
 678         if (rlevel > RAID_UNKNOWN)
 679                 rlevel = RAID_UNKNOWN;
 680         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 681         return l;
 682 }
 683
 684 static ssize_t lunid_show(struct device *dev,
 685              struct device_attribute *attr, char *buf)
 686 {
 687         struct ctlr_info *h;
 688         struct scsi_device *sdev;
 689         struct hpsa_scsi_dev_t *hdev;
 690         unsigned long flags;
 691         unsigned char lunid[8];
 692
 693         sdev = to_scsi_device(dev);
 694         h = sdev_to_hba(sdev);
 695         spin_lock_irqsave(&h->lock, flags);
 696         hdev = sdev->hostdata;
 697         if (!hdev) {
 698                 spin_unlock_irqrestore(&h->lock, flags);
 699                 return -ENODEV;
 700         }
 701         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 702         spin_unlock_irqrestore(&h->lock, flags);
 703         return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
 704                 lunid[0], lunid[1], lunid[2], lunid[3],
 705                 lunid[4], lunid[5], lunid[6], lunid[7]);
 706 }
 707
 708 static ssize_t unique_id_show(struct device *dev,
 709              struct device_attribute *attr, char *buf)
 710 {
 711         struct ctlr_info *h;
 712         struct scsi_device *sdev;
 713         struct hpsa_scsi_dev_t *hdev;
 714         unsigned long flags;
 715         unsigned char sn[16];
 716
 717         sdev = to_scsi_device(dev);
 718         h = sdev_to_hba(sdev);
 719         spin_lock_irqsave(&h->lock, flags);
 720         hdev = sdev->hostdata;
 721         if (!hdev) {
 722                 spin_unlock_irqrestore(&h->lock, flags);
 723                 return -ENODEV;
 724         }
 725         memcpy(sn, hdev->device_id, sizeof(sn));
 726         spin_unlock_irqrestore(&h->lock, flags);
 727         return snprintf(buf, 16 * 2 + 2,
 728                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 729                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 730                         sn[0], sn[1], sn[2], sn[3],
 731                         sn[4], sn[5], sn[6], sn[7],
 732                         sn[8], sn[9], sn[10], sn[11],
 733                         sn[12], sn[13], sn[14], sn[15]);
 734 }
 735
 736 static ssize_t sas_address_show(struct device *dev,
 737               struct device_attribute *attr, char *buf)
 738 {
 739         struct ctlr_info *h;
 740         struct scsi_device *sdev;
 741         struct hpsa_scsi_dev_t *hdev;
 742         unsigned long flags;
 743         u64 sas_address;
 744
 745         sdev = to_scsi_device(dev);
 746         h = sdev_to_hba(sdev);
 747         spin_lock_irqsave(&h->lock, flags);
 748         hdev = sdev->hostdata;
 749         if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
 750                 spin_unlock_irqrestore(&h->lock, flags);
 751                 return -ENODEV;
 752         }
 753         sas_address = hdev->sas_address;
 754         spin_unlock_irqrestore(&h->lock, flags);
 755
 756         return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
 757 }
 758
 759 static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
 760              struct device_attribute *attr, char *buf)
 761 {
 762         struct ctlr_info *h;
 763         struct scsi_device *sdev;
 764         struct hpsa_scsi_dev_t *hdev;
 765         unsigned long flags;
 766         int offload_enabled;
 767
 768         sdev = to_scsi_device(dev);
 769         h = sdev_to_hba(sdev);
 770         spin_lock_irqsave(&h->lock, flags);
 771         hdev = sdev->hostdata;
 772         if (!hdev) {
 773                 spin_unlock_irqrestore(&h->lock, flags);
 774                 return -ENODEV;
 775         }
 776         offload_enabled = hdev->offload_enabled;
 777         spin_unlock_irqrestore(&h->lock, flags);
 778         return snprintf(buf, 20, "%d\n", offload_enabled);
 779 }
 780
 781 #define MAX_PATHS 8
 782 static ssize_t path_info_show(struct device *dev,
 783              struct device_attribute *attr, char *buf)
 784 {
 785         struct ctlr_info *h;
 786         struct scsi_device *sdev;
 787         struct hpsa_scsi_dev_t *hdev;
 788         unsigned long flags;
 789         int i;
 790         int output_len = 0;
 791         u8 box;
 792         u8 bay;
 793         u8 path_map_index = 0;
 794         char *active;
 795         unsigned char phys_connector[2];
 796
 797         sdev = to_scsi_device(dev);
 798         h = sdev_to_hba(sdev);
 799         spin_lock_irqsave(&h->devlock, flags);
 800         hdev = sdev->hostdata;
 801         if (!hdev) {
 802                 spin_unlock_irqrestore(&h->devlock, flags);
 803                 return -ENODEV;
 804         }
 805
 806         bay = hdev->bay;
 807         for (i = 0; i < MAX_PATHS; i++) {
 808                 path_map_index = 1<<i;
 809                 if (i == hdev->active_path_index)
 810                         active = "Active";
 811                 else if (hdev->path_map & path_map_index)
 812                         active = "Inactive";
 813                 else
 814                         continue;
 815
 816                 output_len += scnprintf(buf + output_len,
 817                                 PAGE_SIZE - output_len,
 818                                 "[%d:%d:%d:%d] %20.20s ",
 819                                 h->scsi_host->host_no,
 820                                 hdev->bus, hdev->target, hdev->lun,
 821                                 scsi_device_type(hdev->devtype));
 822
 823                 if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
 824                         output_len += scnprintf(buf + output_len,
 825                                                 PAGE_SIZE - output_len,
 826                                                 "%s\n", active);
 827                         continue;
 828                 }
 829
 830                 box = hdev->box[i];
 831                 memcpy(&phys_connector, &hdev->phys_connector[i],
 832                         sizeof(phys_connector));
 833                 if (phys_connector[0] < '0')
 834                         phys_connector[0] = '0';
 835                 if (phys_connector[1] < '0')
 836                         phys_connector[1] = '0';
 837                 output_len += scnprintf(buf + output_len,
 838                                 PAGE_SIZE - output_len,
 839                                 "PORT: %.2s ",
 840                                 phys_connector);
 841                 if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
 842                         hdev->expose_device) {
 843                         if (box == 0 || box == 0xFF) {
 844                                 output_len += scnprintf(buf + output_len,
 845                                         PAGE_SIZE - output_len,
 846                                         "BAY: %hhu %s\n",
 847                                         bay, active);
 848                         } else {
 849                                 output_len += scnprintf(buf + output_len,
 850                                         PAGE_SIZE - output_len,
 851                                         "BOX: %hhu BAY: %hhu %s\n",
 852                                         box, bay, active);
 853                         }
 854                 } else if (box != 0 && box != 0xFF) {
 855                         output_len += scnprintf(buf + output_len,
 856                                 PAGE_SIZE - output_len, "BOX: %hhu %s\n",
 857                                 box, active);
 858                 } else
 859                         output_len += scnprintf(buf + output_len,
 860                                 PAGE_SIZE - output_len, "%s\n", active);
 861         }
 862
 863         spin_unlock_irqrestore(&h->devlock, flags);
 864         return output_len;
 865 }
 866
 867 static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
 868 static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
 869 static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
 870 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 871 static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
 872 static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
 873                         host_show_hp_ssd_smart_path_enabled, NULL);
 874 static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
 875 static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
 876                 host_show_hp_ssd_smart_path_status,
 877                 host_store_hp_ssd_smart_path_status);
 878 static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
 879                         host_store_raid_offload_debug);
 880 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 881         host_show_firmware_revision, NULL);
 882 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 883         host_show_commands_outstanding, NULL);
 884 static DEVICE_ATTR(transport_mode, S_IRUGO,
 885         host_show_transport_mode, NULL);
 886 static DEVICE_ATTR(resettable, S_IRUGO,
 887         host_show_resettable, NULL);
 888 static DEVICE_ATTR(lockup_detected, S_IRUGO,
 889         host_show_lockup_detected, NULL);
 890
 891 static struct device_attribute *hpsa_sdev_attrs[] = {
 892         &dev_attr_raid_level,
 893         &dev_attr_lunid,
 894         &dev_attr_unique_id,
 895         &dev_attr_hp_ssd_smart_path_enabled,
 896         &dev_attr_path_info,
 897         &dev_attr_sas_address,
 898         NULL,
 899 };
 900
 901 static struct device_attribute *hpsa_shost_attrs[] = {
 902         &dev_attr_rescan,
 903         &dev_attr_firmware_revision,
 904         &dev_attr_commands_outstanding,
 905         &dev_attr_transport_mode,
 906         &dev_attr_resettable,
 907         &dev_attr_hp_ssd_smart_path_status,
 908         &dev_attr_raid_offload_debug,
 909         &dev_attr_lockup_detected,
 910         NULL,
 911 };
 912
 913 #define HPSA_NRESERVED_CMDS     (HPSA_CMDS_RESERVED_FOR_ABORTS + \
 914                 HPSA_CMDS_RESERVED_FOR_DRIVER + HPSA_MAX_CONCURRENT_PASSTHRUS)
 915
 916 static struct scsi_host_template hpsa_driver_template = {
 917         .module                 = THIS_MODULE,
 918         .name                   = HPSA,
 919         .proc_name              = HPSA,
 920         .queuecommand           = hpsa_scsi_queue_command,
 921         .scan_start             = hpsa_scan_start,
 922         .scan_finished          = hpsa_scan_finished,
 923         .change_queue_depth     = hpsa_change_queue_depth,
 924         .this_id                = -1,
 925         .use_clustering         = ENABLE_CLUSTERING,
 926         .eh_abort_handler       = hpsa_eh_abort_handler,
 927         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 928         .ioctl                  = hpsa_ioctl,
 929         .slave_alloc            = hpsa_slave_alloc,
 930         .slave_configure        = hpsa_slave_configure,
 931         .slave_destroy          = hpsa_slave_destroy,
 932 #ifdef CONFIG_COMPAT
 933         .compat_ioctl           = hpsa_compat_ioctl,
 934 #endif
 935         .sdev_attrs = hpsa_sdev_attrs,
 936         .shost_attrs = hpsa_shost_attrs,
 937         .max_sectors = 8192,
 938         .no_write_same = 1,
 939 };
 940
 941 static inline u32 next_command(struct ctlr_info *h, u8 q)
 942 {
 943         u32 a;
 944         struct reply_queue_buffer *rq = &h->reply_queue[q];
 945
 946         if (h->transMethod & CFGTBL_Trans_io_accel1)
 947                 return h->access.command_completed(h, q);
 948
 949         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
 950                 return h->access.command_completed(h, q);
 951
 952         if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
 953                 a = rq->head[rq->current_entry];
 954                 rq->current_entry++;
 955                 atomic_dec(&h->commands_outstanding);
 956         } else {
 957                 a = FIFO_EMPTY;
 958         }
 959         /* Check for wraparound */
 960         if (rq->current_entry == h->max_commands) {
 961                 rq->current_entry = 0;
 962                 rq->wraparound ^= 1;
 963         }
 964         return a;
 965 }
 966
 967 /*
 968  * There are some special bits in the bus address of the
 969  * command that we have to set for the controller to know
 970  * how to process the command:
 971  *
 972  * Normal performant mode:
 973  * bit 0: 1 means performant mode, 0 means simple mode.
 974  * bits 1-3 = block fetch table entry
 975  * bits 4-6 = command type (== 0)
 976  *
 977  * ioaccel1 mode:
 978  * bit 0 = "performant mode" bit.
 979  * bits 1-3 = block fetch table entry
 980  * bits 4-6 = command type (== 110)
 981  * (command type is needed because ioaccel1 mode
 982  * commands are submitted through the same register as normal
 983  * mode commands, so this is how the controller knows whether
 984  * the command is normal mode or ioaccel1 mode.)
 985  *
 986  * ioaccel2 mode:
 987  * bit 0 = "performant mode" bit.
 988  * bits 1-4 = block fetch table entry (note extra bit)
 989  * bits 4-6 = not needed, because ioaccel2 mode has
 990  * a separate special register for submitting commands.
 991  */
 992
 993 /*
 994  * set_performant_mode: Modify the tag for cciss performant
 995  * set bit 0 for pull model, bits 3-1 for block fetch
 996  * register number
 997  */
 998 #define DEFAULT_REPLY_QUEUE (-1)
 999 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
1000                                         int reply_queue)
1001 {
1002         if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1003                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1004                 if (unlikely(!h->msix_vector))
1005                         return;
1006                 if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1007                         c->Header.ReplyQueue =
1008                                 raw_smp_processor_id() % h->nreply_queues;
1009                 else
1010                         c->Header.ReplyQueue = reply_queue % h->nreply_queues;
1011         }
1012 }
1013
1014 static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1015                                                 struct CommandList *c,
1016                                                 int reply_queue)
1017 {
1018         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
1019
1020         /*
1021          * Tell the controller to post the reply to the queue for this
1022          * processor.  This seems to give the best I/O throughput.
1023          */
1024         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1025                 cp->ReplyQueue = smp_processor_id() % h->nreply_queues;
1026         else
1027                 cp->ReplyQueue = reply_queue % h->nreply_queues;
1028         /*
1029          * Set the bits in the address sent down to include:
1030          *  - performant mode bit (bit 0)
1031          *  - pull count (bits 1-3)
1032          *  - command type (bits 4-6)
1033          */
1034         c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
1035                                         IOACCEL1_BUSADDR_CMDTYPE;
1036 }
1037
1038 static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
1039                                                 struct CommandList *c,
1040                                                 int reply_queue)
1041 {
1042         struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
1043                 &h->ioaccel2_cmd_pool[c->cmdindex];
1044
1045         /* Tell the controller to post the reply to the queue for this
1046          * processor.  This seems to give the best I/O throughput.
1047          */
1048         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1049                 cp->reply_queue = smp_processor_id() % h->nreply_queues;
1050         else
1051                 cp->reply_queue = reply_queue % h->nreply_queues;
1052         /* Set the bits in the address sent down to include:
1053          *  - performant mode bit not used in ioaccel mode 2
1054          *  - pull count (bits 0-3)
1055          *  - command type isn't needed for ioaccel2
1056          */
1057         c->busaddr |= h->ioaccel2_blockFetchTable[0];
1058 }
1059
1060 static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1061                                                 struct CommandList *c,
1062                                                 int reply_queue)
1063 {
1064         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
1065
1066         /*
1067          * Tell the controller to post the reply to the queue for this
1068          * processor.  This seems to give the best I/O throughput.
1069          */
1070         if (likely(reply_queue == DEFAULT_REPLY_QUEUE))
1071                 cp->reply_queue = smp_processor_id() % h->nreply_queues;
1072         else
1073                 cp->reply_queue = reply_queue % h->nreply_queues;
1074         /*
1075          * Set the bits in the address sent down to include:
1076          *  - performant mode bit not used in ioaccel mode 2
1077          *  - pull count (bits 0-3)
1078          *  - command type isn't needed for ioaccel2
1079          */
1080         c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
1081 }
1082
1083 static int is_firmware_flash_cmd(u8 *cdb)
1084 {
1085         return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
1086 }
1087
1088 /*
1089  * During firmware flash, the heartbeat register may not update as frequently
1090  * as it should.  So we dial down lockup detection during firmware flash. and
1091  * dial it back up when firmware flash completes.
1092  */
1093 #define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
1094 #define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
1095 static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
1096                 struct CommandList *c)
1097 {
1098         if (!is_firmware_flash_cmd(c->Request.CDB))
1099                 return;
1100         atomic_inc(&h->firmware_flash_in_progress);
1101         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
1102 }
1103
1104 static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
1105                 struct CommandList *c)
1106 {
1107         if (is_firmware_flash_cmd(c->Request.CDB) &&
1108                 atomic_dec_and_test(&h->firmware_flash_in_progress))
1109                 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
1110 }
1111
1112 static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
1113         struct CommandList *c, int reply_queue)
1114 {
1115         dial_down_lockup_detection_during_fw_flash(h, c);
1116         atomic_inc(&h->commands_outstanding);
1117         switch (c->cmd_type) {
1118         case CMD_IOACCEL1:
1119                 set_ioaccel1_performant_mode(h, c, reply_queue);
1120                 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1121                 break;
1122         case CMD_IOACCEL2:
1123                 set_ioaccel2_performant_mode(h, c, reply_queue);
1124                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1125                 break;
1126         case IOACCEL2_TMF:
1127                 set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
1128                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1129                 break;
1130         default:
1131                 set_performant_mode(h, c, reply_queue);
1132                 h->access.submit_command(h, c);
1133         }
1134 }
1135
1136 static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1137 {
1138         if (unlikely(hpsa_is_pending_event(c)))
1139                 return finish_cmd(c);
1140
1141         __enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
1142 }
1143
1144 static inline int is_hba_lunid(unsigned char scsi3addr[])
1145 {
1146         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
1147 }
1148
1149 static inline int is_scsi_rev_5(struct ctlr_info *h)
1150 {
1151         if (!h->hba_inquiry_data)
1152                 return 0;
1153         if ((h->hba_inquiry_data[2] & 0x07) == 5)
1154                 return 1;
1155         return 0;
1156 }
1157
1158 static int hpsa_find_target_lun(struct ctlr_info *h,
1159         unsigned char scsi3addr[], int bus, int *target, int *lun)
1160 {
1161         /* finds an unused bus, target, lun for a new physical device
1162          * assumes h->devlock is held
1163          */
1164         int i, found = 0;
1165         DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1166
1167         bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1168
1169         for (i = 0; i < h->ndevices; i++) {
1170                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1171                         __set_bit(h->dev[i]->target, lun_taken);
1172         }
1173
1174         i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
1175         if (i < HPSA_MAX_DEVICES) {
1176                 /* *bus = 1; */
1177                 *target = i;
1178                 *lun = 0;
1179                 found = 1;
1180         }
1181         return !found;
1182 }
1183
1184 static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1185         struct hpsa_scsi_dev_t *dev, char *description)
1186 {
1187 #define LABEL_SIZE 25
1188         char label[LABEL_SIZE];
1189
1190         if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
1191                 return;
1192
1193         switch (dev->devtype) {
1194         case TYPE_RAID:
1195                 snprintf(label, LABEL_SIZE, "controller");
1196                 break;
1197         case TYPE_ENCLOSURE:
1198                 snprintf(label, LABEL_SIZE, "enclosure");
1199                 break;
1200         case TYPE_DISK:
1201         case TYPE_ZBC:
1202                 if (dev->external)
1203                         snprintf(label, LABEL_SIZE, "external");
1204                 else if (!is_logical_dev_addr_mode(dev->scsi3addr))
1205                         snprintf(label, LABEL_SIZE, "%s",
1206                                 raid_label[PHYSICAL_DRIVE]);
1207                 else
1208                         snprintf(label, LABEL_SIZE, "RAID-%s",
1209                                 dev->raid_level > RAID_UNKNOWN ? "?" :
1210                                 raid_label[dev->raid_level]);
1211                 break;
1212         case TYPE_ROM:
1213                 snprintf(label, LABEL_SIZE, "rom");
1214                 break;
1215         case TYPE_TAPE:
1216                 snprintf(label, LABEL_SIZE, "tape");
1217                 break;
1218         case TYPE_MEDIUM_CHANGER:
1219                 snprintf(label, LABEL_SIZE, "changer");
1220                 break;
1221         default:
1222                 snprintf(label, LABEL_SIZE, "UNKNOWN");
1223                 break;
1224         }
1225
1226         dev_printk(level, &h->pdev->dev,
1227                         "scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1228                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
1229                         description,
1230                         scsi_device_type(dev->devtype),
1231                         dev->vendor,
1232                         dev->model,
1233                         label,
1234                         dev->offload_config ? '+' : '-',
1235                         dev->offload_enabled ? '+' : '-',
1236                         dev->expose_device);
1237 }
1238
1239 /* Add an entry into h->dev[] array. */
1240 static int hpsa_scsi_add_entry(struct ctlr_info *h,
1241                 struct hpsa_scsi_dev_t *device,
1242                 struct hpsa_scsi_dev_t *added[], int *nadded)
1243 {
1244         /* assumes h->devlock is held */
1245         int n = h->ndevices;
1246         int i;
1247         unsigned char addr1[8], addr2[8];
1248         struct hpsa_scsi_dev_t *sd;
1249
1250         if (n >= HPSA_MAX_DEVICES) {
1251                 dev_err(&h->pdev->dev, "too many devices, some will be "
1252                         "inaccessible.\n");
1253                 return -1;
1254         }
1255
1256         /* physical devices do not have lun or target assigned until now. */
1257         if (device->lun != -1)
1258                 /* Logical device, lun is already assigned. */
1259                 goto lun_assigned;
1260
1261         /* If this device a non-zero lun of a multi-lun device
1262          * byte 4 of the 8-byte LUN addr will contain the logical
1263          * unit no, zero otherwise.
1264          */
1265         if (device->scsi3addr[4] == 0) {
1266                 /* This is not a non-zero lun of a multi-lun device */
1267                 if (hpsa_find_target_lun(h, device->scsi3addr,
1268                         device->bus, &device->target, &device->lun) != 0)
1269                         return -1;
1270                 goto lun_assigned;
1271         }
1272
1273         /* This is a non-zero lun of a multi-lun device.
1274          * Search through our list and find the device which
1275          * has the same 8 byte LUN address, excepting byte 4 and 5.
1276          * Assign the same bus and target for this new LUN.
1277          * Use the logical unit number from the firmware.
1278          */
1279         memcpy(addr1, device->scsi3addr, 8);
1280         addr1[4] = 0;
1281         addr1[5] = 0;
1282         for (i = 0; i < n; i++) {
1283                 sd = h->dev[i];
1284                 memcpy(addr2, sd->scsi3addr, 8);
1285                 addr2[4] = 0;
1286                 addr2[5] = 0;
1287                 /* differ only in byte 4 and 5? */
1288                 if (memcmp(addr1, addr2, 8) == 0) {
1289                         device->bus = sd->bus;
1290                         device->target = sd->target;
1291                         device->lun = device->scsi3addr[4];
1292                         break;
1293                 }
1294         }
1295         if (device->lun == -1) {
1296                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
1297                         " suspect firmware bug or unsupported hardware "
1298                         "configuration.\n");
1299                         return -1;
1300         }
1301
1302 lun_assigned:
1303
1304         h->dev[n] = device;
1305         h->ndevices++;
1306         added[*nadded] = device;
1307         (*nadded)++;
1308         hpsa_show_dev_msg(KERN_INFO, h, device,
1309                 device->expose_device ? "added" : "masked");
1310         device->offload_to_be_enabled = device->offload_enabled;
1311         device->offload_enabled = 0;
1312         return 0;
1313 }
1314
1315 /* Update an entry in h->dev[] array. */
1316 static void hpsa_scsi_update_entry(struct ctlr_info *h,
1317         int entry, struct hpsa_scsi_dev_t *new_entry)
1318 {
1319         int offload_enabled;
1320         /* assumes h->devlock is held */
1321         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1322
1323         /* Raid level changed. */
1324         h->dev[entry]->raid_level = new_entry->raid_level;
1325
1326         /* Raid offload parameters changed.  Careful about the ordering. */
1327         if (new_entry->offload_config && new_entry->offload_enabled) {
1328                 /*
1329                  * if drive is newly offload_enabled, we want to copy the
1330                  * raid map data first.  If previously offload_enabled and
1331                  * offload_config were set, raid map data had better be
1332                  * the same as it was before.  if raid map data is changed
1333                  * then it had better be the case that
1334                  * h->dev[entry]->offload_enabled is currently 0.
1335                  */
1336                 h->dev[entry]->raid_map = new_entry->raid_map;
1337                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1338         }
1339         if (new_entry->hba_ioaccel_enabled) {
1340                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1341                 wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
1342         }
1343         h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1344         h->dev[entry]->offload_config = new_entry->offload_config;
1345         h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1346         h->dev[entry]->queue_depth = new_entry->queue_depth;
1347
1348         /*
1349          * We can turn off ioaccel offload now, but need to delay turning
1350          * it on until we can update h->dev[entry]->phys_disk[], but we
1351          * can't do that until all the devices are updated.
1352          */
1353         h->dev[entry]->offload_to_be_enabled = new_entry->offload_enabled;
1354         if (!new_entry->offload_enabled)
1355                 h->dev[entry]->offload_enabled = 0;
1356
1357         offload_enabled = h->dev[entry]->offload_enabled;
1358         h->dev[entry]->offload_enabled = h->dev[entry]->offload_to_be_enabled;
1359         hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1360         h->dev[entry]->offload_enabled = offload_enabled;
1361 }
1362
1363 /* Replace an entry from h->dev[] array. */
1364 static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1365         int entry, struct hpsa_scsi_dev_t *new_entry,
1366         struct hpsa_scsi_dev_t *added[], int *nadded,
1367         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1368 {
1369         /* assumes h->devlock is held */
1370         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1371         removed[*nremoved] = h->dev[entry];
1372         (*nremoved)++;
1373
1374         /*
1375          * New physical devices won't have target/lun assigned yet
1376          * so we need to preserve the values in the slot we are replacing.
1377          */
1378         if (new_entry->target == -1) {
1379                 new_entry->target = h->dev[entry]->target;
1380                 new_entry->lun = h->dev[entry]->lun;
1381         }
1382
1383         h->dev[entry] = new_entry;
1384         added[*nadded] = new_entry;
1385         (*nadded)++;
1386         hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1387         new_entry->offload_to_be_enabled = new_entry->offload_enabled;
1388         new_entry->offload_enabled = 0;
1389 }
1390
1391 /* Remove an entry from h->dev[] array. */
1392 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1393         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1394 {
1395         /* assumes h->devlock is held */
1396         int i;
1397         struct hpsa_scsi_dev_t *sd;
1398
1399         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1400
1401         sd = h->dev[entry];
1402         removed[*nremoved] = h->dev[entry];
1403         (*nremoved)++;
1404
1405         for (i = entry; i < h->ndevices-1; i++)
1406                 h->dev[i] = h->dev[i+1];
1407         h->ndevices--;
1408         hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1409 }
1410
1411 #define SCSI3ADDR_EQ(a, b) ( \
1412         (a)[7] == (b)[7] && \
1413         (a)[6] == (b)[6] && \
1414         (a)[5] == (b)[5] && \
1415         (a)[4] == (b)[4] && \
1416         (a)[3] == (b)[3] && \
1417         (a)[2] == (b)[2] && \
1418         (a)[1] == (b)[1] && \
1419         (a)[0] == (b)[0])
1420
1421 static void fixup_botched_add(struct ctlr_info *h,
1422         struct hpsa_scsi_dev_t *added)
1423 {
1424         /* called when scsi_add_device fails in order to re-adjust
1425          * h->dev[] to match the mid layer's view.
1426          */
1427         unsigned long flags;
1428         int i, j;
1429
1430         spin_lock_irqsave(&h->lock, flags);
1431         for (i = 0; i < h->ndevices; i++) {
1432                 if (h->dev[i] == added) {
1433                         for (j = i; j < h->ndevices-1; j++)
1434                                 h->dev[j] = h->dev[j+1];
1435                         h->ndevices--;
1436                         break;
1437                 }
1438         }
1439         spin_unlock_irqrestore(&h->lock, flags);
1440         kfree(added);
1441 }
1442
1443 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
1444         struct hpsa_scsi_dev_t *dev2)
1445 {
1446         /* we compare everything except lun and target as these
1447          * are not yet assigned.  Compare parts likely
1448          * to differ first
1449          */
1450         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
1451                 sizeof(dev1->scsi3addr)) != 0)
1452                 return 0;
1453         if (memcmp(dev1->device_id, dev2->device_id,
1454                 sizeof(dev1->device_id)) != 0)
1455                 return 0;
1456         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
1457                 return 0;
1458         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
1459                 return 0;
1460         if (dev1->devtype != dev2->devtype)
1461                 return 0;
1462         if (dev1->bus != dev2->bus)
1463                 return 0;
1464         return 1;
1465 }
1466
1467 static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
1468         struct hpsa_scsi_dev_t *dev2)
1469 {
1470         /* Device attributes that can change, but don't mean
1471          * that the device is a different device, nor that the OS
1472          * needs to be told anything about the change.
1473          */
1474         if (dev1->raid_level != dev2->raid_level)
1475                 return 1;
1476         if (dev1->offload_config != dev2->offload_config)
1477                 return 1;
1478         if (dev1->offload_enabled != dev2->offload_enabled)
1479                 return 1;
1480         if (!is_logical_dev_addr_mode(dev1->scsi3addr))
1481                 if (dev1->queue_depth != dev2->queue_depth)
1482                         return 1;
1483         return 0;
1484 }
1485
1486 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
1487  * and return needle location in *index.  If scsi3addr matches, but not
1488  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1489  * location in *index.
1490  * In the case of a minor device attribute change, such as RAID level, just
1491  * return DEVICE_UPDATED, along with the updated device's location in index.
1492  * If needle not found, return DEVICE_NOT_FOUND.
1493  */
1494 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
1495         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
1496         int *index)
1497 {
1498         int i;
1499 #define DEVICE_NOT_FOUND 0
1500 #define DEVICE_CHANGED 1
1501 #define DEVICE_SAME 2
1502 #define DEVICE_UPDATED 3
1503         if (needle == NULL)
1504                 return DEVICE_NOT_FOUND;
1505
1506         for (i = 0; i < haystack_size; i++) {
1507                 if (haystack[i] == NULL) /* previously removed. */
1508                         continue;
1509                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
1510                         *index = i;
1511                         if (device_is_the_same(needle, haystack[i])) {
1512                                 if (device_updated(needle, haystack[i]))
1513                                         return DEVICE_UPDATED;
1514                                 return DEVICE_SAME;
1515                         } else {
1516                                 /* Keep offline devices offline */
1517                                 if (needle->volume_offline)
1518                                         return DEVICE_NOT_FOUND;
1519                                 return DEVICE_CHANGED;
1520                         }
1521                 }
1522         }
1523         *index = -1;
1524         return DEVICE_NOT_FOUND;
1525 }
1526
1527 static void hpsa_monitor_offline_device(struct ctlr_info *h,
1528                                         unsigned char scsi3addr[])
1529 {
1530         struct offline_device_entry *device;
1531         unsigned long flags;
1532
1533         /* Check to see if device is already on the list */
1534         spin_lock_irqsave(&h->offline_device_lock, flags);
1535         list_for_each_entry(device, &h->offline_device_list, offline_list) {
1536                 if (memcmp(device->scsi3addr, scsi3addr,
1537                         sizeof(device->scsi3addr)) == 0) {
1538                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1539                         return;
1540                 }
1541         }
1542         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1543
1544         /* Device is not on the list, add it. */
1545         device = kmalloc(sizeof(*device), GFP_KERNEL);
1546         if (!device) {
1547                 dev_warn(&h->pdev->dev, "out of memory in %s\n", __func__);
1548                 return;
1549         }
1550         memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1551         spin_lock_irqsave(&h->offline_device_lock, flags);
1552         list_add_tail(&device->offline_list, &h->offline_device_list);
1553         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1554 }
1555
1556 /* Print a message explaining various offline volume states */
1557 static void hpsa_show_volume_status(struct ctlr_info *h,
1558         struct hpsa_scsi_dev_t *sd)
1559 {
1560         if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
1561                 dev_info(&h->pdev->dev,
1562                         "C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
1563                         h->scsi_host->host_no,
1564                         sd->bus, sd->target, sd->lun);
1565         switch (sd->volume_offline) {
1566         case HPSA_LV_OK:
1567                 break;
1568         case HPSA_LV_UNDERGOING_ERASE:
1569                 dev_info(&h->pdev->dev,
1570                         "C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
1571                         h->scsi_host->host_no,
1572                         sd->bus, sd->target, sd->lun);
1573                 break;
1574         case HPSA_LV_NOT_AVAILABLE:
1575                 dev_info(&h->pdev->dev,
1576                         "C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
1577                         h->scsi_host->host_no,
1578                         sd->bus, sd->target, sd->lun);
1579                 break;
1580         case HPSA_LV_UNDERGOING_RPI:
1581                 dev_info(&h->pdev->dev,
1582                         "C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1583                         h->scsi_host->host_no,
1584                         sd->bus, sd->target, sd->lun);
1585                 break;
1586         case HPSA_LV_PENDING_RPI:
1587                 dev_info(&h->pdev->dev,
1588                         "C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
1589                         h->scsi_host->host_no,
1590                         sd->bus, sd->target, sd->lun);
1591                 break;
1592         case HPSA_LV_ENCRYPTED_NO_KEY:
1593                 dev_info(&h->pdev->dev,
1594                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
1595                         h->scsi_host->host_no,
1596                         sd->bus, sd->target, sd->lun);
1597                 break;
1598         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
1599                 dev_info(&h->pdev->dev,
1600                         "C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
1601                         h->scsi_host->host_no,
1602                         sd->bus, sd->target, sd->lun);
1603                 break;
1604         case HPSA_LV_UNDERGOING_ENCRYPTION:
1605                 dev_info(&h->pdev->dev,
1606                         "C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
1607                         h->scsi_host->host_no,
1608                         sd->bus, sd->target, sd->lun);
1609                 break;
1610         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
1611                 dev_info(&h->pdev->dev,
1612                         "C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
1613                         h->scsi_host->host_no,
1614                         sd->bus, sd->target, sd->lun);
1615                 break;
1616         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1617                 dev_info(&h->pdev->dev,
1618                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
1619                         h->scsi_host->host_no,
1620                         sd->bus, sd->target, sd->lun);
1621                 break;
1622         case HPSA_LV_PENDING_ENCRYPTION:
1623                 dev_info(&h->pdev->dev,
1624                         "C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
1625                         h->scsi_host->host_no,
1626                         sd->bus, sd->target, sd->lun);
1627                 break;
1628         case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
1629                 dev_info(&h->pdev->dev,
1630                         "C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
1631                         h->scsi_host->host_no,
1632                         sd->bus, sd->target, sd->lun);
1633                 break;
1634         }
1635 }
1636
1637 /*
1638  * Figure the list of physical drive pointers for a logical drive with
1639  * raid offload configured.
1640  */
1641 static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
1642                                 struct hpsa_scsi_dev_t *dev[], int ndevices,
1643                                 struct hpsa_scsi_dev_t *logical_drive)
1644 {
1645         struct raid_map_data *map = &logical_drive->raid_map;
1646         struct raid_map_disk_data *dd = &map->data[0];
1647         int i, j;
1648         int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
1649                                 le16_to_cpu(map->metadata_disks_per_row);
1650         int nraid_map_entries = le16_to_cpu(map->row_cnt) *
1651                                 le16_to_cpu(map->layout_map_count) *
1652                                 total_disks_per_row;
1653         int nphys_disk = le16_to_cpu(map->layout_map_count) *
1654                                 total_disks_per_row;
1655         int qdepth;
1656
1657         if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
1658                 nraid_map_entries = RAID_MAP_MAX_ENTRIES;
1659
1660         logical_drive->nphysical_disks = nraid_map_entries;
1661
1662         qdepth = 0;
1663         for (i = 0; i < nraid_map_entries; i++) {
1664                 logical_drive->phys_disk[i] = NULL;
1665                 if (!logical_drive->offload_config)
1666                         continue;
1667                 for (j = 0; j < ndevices; j++) {
1668                         if (dev[j] == NULL)
1669                                 continue;
1670                         if (dev[j]->devtype != TYPE_DISK &&
1671                             dev[j]->devtype != TYPE_ZBC)
1672                                 continue;
1673                         if (is_logical_device(dev[j]))
1674                                 continue;
1675                         if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
1676                                 continue;
1677
1678                         logical_drive->phys_disk[i] = dev[j];
1679                         if (i < nphys_disk)
1680                                 qdepth = min(h->nr_cmds, qdepth +
1681                                     logical_drive->phys_disk[i]->queue_depth);
1682                         break;
1683                 }
1684
1685                 /*
1686                  * This can happen if a physical drive is removed and
1687                  * the logical drive is degraded.  In that case, the RAID
1688                  * map data will refer to a physical disk which isn't actually
1689                  * present.  And in that case offload_enabled should already
1690                  * be 0, but we'll turn it off here just in case
1691                  */
1692                 if (!logical_drive->phys_disk[i]) {
1693                         logical_drive->offload_enabled = 0;
1694                         logical_drive->offload_to_be_enabled = 0;
1695                         logical_drive->queue_depth = 8;
1696                 }
1697         }
1698         if (nraid_map_entries)
1699                 /*
1700                  * This is correct for reads, too high for full stripe writes,
1701                  * way too high for partial stripe writes
1702                  */
1703                 logical_drive->queue_depth = qdepth;
1704         else
1705                 logical_drive->queue_depth = h->nr_cmds;
1706 }
1707
1708 static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
1709                                 struct hpsa_scsi_dev_t *dev[], int ndevices)
1710 {
1711         int i;
1712
1713         for (i = 0; i < ndevices; i++) {
1714                 if (dev[i] == NULL)
1715                         continue;
1716                 if (dev[i]->devtype != TYPE_DISK &&
1717                     dev[i]->devtype != TYPE_ZBC)
1718                         continue;
1719                 if (!is_logical_device(dev[i]))
1720                         continue;
1721
1722                 /*
1723                  * If offload is currently enabled, the RAID map and
1724                  * phys_disk[] assignment *better* not be changing
1725                  * and since it isn't changing, we do not need to
1726                  * update it.
1727                  */
1728                 if (dev[i]->offload_enabled)
1729                         continue;
1730
1731                 hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
1732         }
1733 }
1734
1735 static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1736 {
1737         int rc = 0;
1738
1739         if (!h->scsi_host)
1740                 return 1;
1741
1742         if (is_logical_device(device)) /* RAID */
1743                 rc = scsi_add_device(h->scsi_host, device->bus,
1744                                         device->target, device->lun);
1745         else /* HBA */
1746                 rc = hpsa_add_sas_device(h->sas_host, device);
1747
1748         return rc;
1749 }
1750
1751 static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
1752                                                 struct hpsa_scsi_dev_t *dev)
1753 {
1754         int i;
1755         int count = 0;
1756
1757         for (i = 0; i < h->nr_cmds; i++) {
1758                 struct CommandList *c = h->cmd_pool + i;
1759                 int refcount = atomic_inc_return(&c->refcount);
1760
1761                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
1762                                 dev->scsi3addr)) {
1763                         unsigned long flags;
1764
1765                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
1766                         if (!hpsa_is_cmd_idle(c))
1767                                 ++count;
1768                         spin_unlock_irqrestore(&h->lock, flags);
1769                 }
1770
1771                 cmd_free(h, c);
1772         }
1773
1774         return count;
1775 }
1776
1777 static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
1778                                                 struct hpsa_scsi_dev_t *device)
1779 {
1780         int cmds = 0;
1781         int waits = 0;
1782
1783         while (1) {
1784                 cmds = hpsa_find_outstanding_commands_for_dev(h, device);
1785                 if (cmds == 0)
1786                         break;
1787                 if (++waits > 20)
1788                         break;
1789                 dev_warn(&h->pdev->dev,
1790                         "%s: removing device with %d outstanding commands!\n",
1791                         __func__, cmds);
1792                 msleep(1000);
1793         }
1794 }
1795
1796 static void hpsa_remove_device(struct ctlr_info *h,
1797                         struct hpsa_scsi_dev_t *device)
1798 {
1799         struct scsi_device *sdev = NULL;
1800
1801         if (!h->scsi_host)
1802                 return;
1803
1804         if (is_logical_device(device)) { /* RAID */
1805                 sdev = scsi_device_lookup(h->scsi_host, device->bus,
1806                                                 device->target, device->lun);
1807                 if (sdev) {
1808                         scsi_remove_device(sdev);
1809                         scsi_device_put(sdev);
1810                 } else {
1811                         /*
1812                          * We don't expect to get here.  Future commands
1813                          * to this device will get a selection timeout as
1814                          * if the device were gone.
1815                          */
1816                         hpsa_show_dev_msg(KERN_WARNING, h, device,
1817                                         "didn't find device for removal.");
1818                 }
1819         } else { /* HBA */
1820
1821                 device->removed = 1;
1822                 hpsa_wait_for_outstanding_commands_for_dev(h, device);
1823
1824                 hpsa_remove_sas_device(device);
1825         }
1826 }
1827
1828 static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1829         struct hpsa_scsi_dev_t *sd[], int nsds)
1830 {
1831         /* sd contains scsi3 addresses and devtypes, and inquiry
1832          * data.  This function takes what's in sd to be the current
1833          * reality and updates h->dev[] to reflect that reality.
1834          */
1835         int i, entry, device_change, changes = 0;
1836         struct hpsa_scsi_dev_t *csd;
1837         unsigned long flags;
1838         struct hpsa_scsi_dev_t **added, **removed;
1839         int nadded, nremoved;
1840
1841         /*
1842          * A reset can cause a device status to change
1843          * re-schedule the scan to see what happened.
1844          */
1845         if (h->reset_in_progress) {
1846                 h->drv_req_rescan = 1;
1847                 return;
1848         }
1849
1850         added = kzalloc(sizeof(*added) * HPSA_MAX_DEVICES, GFP_KERNEL);
1851         removed = kzalloc(sizeof(*removed) * HPSA_MAX_DEVICES, GFP_KERNEL);
1852
1853         if (!added || !removed) {
1854                 dev_warn(&h->pdev->dev, "out of memory in "
1855                         "adjust_hpsa_scsi_table\n");
1856                 goto free_and_out;
1857         }
1858
1859         spin_lock_irqsave(&h->devlock, flags);
1860
1861         /* find any devices in h->dev[] that are not in
1862          * sd[] and remove them from h->dev[], and for any
1863          * devices which have changed, remove the old device
1864          * info and add the new device info.
1865          * If minor device attributes change, just update
1866          * the existing device structure.
1867          */
1868         i = 0;
1869         nremoved = 0;
1870         nadded = 0;
1871         while (i < h->ndevices) {
1872                 csd = h->dev[i];
1873                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
1874                 if (device_change == DEVICE_NOT_FOUND) {
1875                         changes++;
1876                         hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1877                         continue; /* remove ^^^, hence i not incremented */
1878                 } else if (device_change == DEVICE_CHANGED) {
1879                         changes++;
1880                         hpsa_scsi_replace_entry(h, i, sd[entry],
1881                                 added, &nadded, removed, &nremoved);
1882                         /* Set it to NULL to prevent it from being freed
1883                          * at the bottom of hpsa_update_scsi_devices()
1884                          */
1885                         sd[entry] = NULL;
1886                 } else if (device_change == DEVICE_UPDATED) {
1887                         hpsa_scsi_update_entry(h, i, sd[entry]);
1888                 }
1889                 i++;
1890         }
1891
1892         /* Now, make sure every device listed in sd[] is also
1893          * listed in h->dev[], adding them if they aren't found
1894          */
1895
1896         for (i = 0; i < nsds; i++) {
1897                 if (!sd[i]) /* if already added above. */
1898                         continue;
1899
1900                 /* Don't add devices which are NOT READY, FORMAT IN PROGRESS
1901                  * as the SCSI mid-layer does not handle such devices well.
1902                  * It relentlessly loops sending TUR at 3Hz, then READ(10)
1903                  * at 160Hz, and prevents the system from coming up.
1904                  */
1905                 if (sd[i]->volume_offline) {
1906                         hpsa_show_volume_status(h, sd[i]);
1907                         hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
1908                         continue;
1909                 }
1910
1911                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
1912                                         h->ndevices, &entry);
1913                 if (device_change == DEVICE_NOT_FOUND) {
1914                         changes++;
1915                         if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
1916                                 break;
1917                         sd[i] = NULL; /* prevent from being freed later. */
1918                 } else if (device_change == DEVICE_CHANGED) {
1919                         /* should never happen... */
1920                         changes++;
1921                         dev_warn(&h->pdev->dev,
1922                                 "device unexpectedly changed.\n");
1923                         /* but if it does happen, we just ignore that device */
1924                 }
1925         }
1926         hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);
1927
1928         /* Now that h->dev[]->phys_disk[] is coherent, we can enable
1929          * any logical drives that need it enabled.
1930          */
1931         for (i = 0; i < h->ndevices; i++) {
1932                 if (h->dev[i] == NULL)
1933                         continue;
1934                 h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
1935         }
1936
1937         spin_unlock_irqrestore(&h->devlock, flags);
1938
1939         /* Monitor devices which are in one of several NOT READY states to be
1940          * brought online later. This must be done without holding h->devlock,
1941          * so don't touch h->dev[]
1942          */
1943         for (i = 0; i < nsds; i++) {
1944                 if (!sd[i]) /* if already added above. */
1945                         continue;
1946                 if (sd[i]->volume_offline)
1947                         hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
1948         }
1949
1950         /* Don't notify scsi mid layer of any changes the first time through
1951          * (or if there are no changes) scsi_scan_host will do it later the
1952          * first time through.
1953          */
1954         if (!changes)
1955                 goto free_and_out;
1956
1957         /* Notify scsi mid layer of any removed devices */
1958         for (i = 0; i < nremoved; i++) {
1959                 if (removed[i] == NULL)
1960                         continue;
1961                 if (removed[i]->expose_device)
1962                         hpsa_remove_device(h, removed[i]);
1963                 kfree(removed[i]);
1964                 removed[i] = NULL;
1965         }
1966
1967         /* Notify scsi mid layer of any added devices */
1968         for (i = 0; i < nadded; i++) {
1969                 int rc = 0;
1970
1971                 if (added[i] == NULL)
1972                         continue;
1973                 if (!(added[i]->expose_device))
1974                         continue;
1975                 rc = hpsa_add_device(h, added[i]);
1976                 if (!rc)
1977                         continue;
1978                 dev_warn(&h->pdev->dev,
1979                         "addition failed %d, device not added.", rc);
1980                 /* now we have to remove it from h->dev,
1981                  * since it didn't get added to scsi mid layer
1982                  */
1983                 fixup_botched_add(h, added[i]);
1984                 h->drv_req_rescan = 1;
1985         }
1986
1987 free_and_out:
1988         kfree(added);
1989         kfree(removed);
1990 }
1991
1992 /*
1993  * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
1994  * Assume's h->devlock is held.
1995  */
1996 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
1997         int bus, int target, int lun)
1998 {
1999         int i;
2000         struct hpsa_scsi_dev_t *sd;
2001
2002         for (i = 0; i < h->ndevices; i++) {
2003                 sd = h->dev[i];
2004                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
2005                         return sd;
2006         }
2007         return NULL;
2008 }
2009
2010 static int hpsa_slave_alloc(struct scsi_device *sdev)
2011 {
2012         struct hpsa_scsi_dev_t *sd = NULL;
2013         unsigned long flags;
2014         struct ctlr_info *h;
2015
2016         h = sdev_to_hba(sdev);
2017         spin_lock_irqsave(&h->devlock, flags);
2018         if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
2019                 struct scsi_target *starget;
2020                 struct sas_rphy *rphy;
2021
2022                 starget = scsi_target(sdev);
2023                 rphy = target_to_rphy(starget);
2024                 sd = hpsa_find_device_by_sas_rphy(h, rphy);
2025                 if (sd) {
2026                         sd->target = sdev_id(sdev);
2027                         sd->lun = sdev->lun;
2028                 }
2029         }
2030         if (!sd)
2031                 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
2032                                         sdev_id(sdev), sdev->lun);
2033
2034         if (sd && sd->expose_device) {
2035                 atomic_set(&sd->ioaccel_cmds_out, 0);
2036                 sdev->hostdata = sd;
2037         } else
2038                 sdev->hostdata = NULL;
2039         spin_unlock_irqrestore(&h->devlock, flags);
2040         return 0;
2041 }
2042
2043 /* configure scsi device based on internal per-device structure */
2044 static int hpsa_slave_configure(struct scsi_device *sdev)
2045 {
2046         struct hpsa_scsi_dev_t *sd;
2047         int queue_depth;
2048
2049         sd = sdev->hostdata;
2050         sdev->no_uld_attach = !sd || !sd->expose_device;
2051
2052         if (sd)
2053                 queue_depth = sd->queue_depth != 0 ?
2054                         sd->queue_depth : sdev->host->can_queue;
2055         else
2056                 queue_depth = sdev->host->can_queue;
2057
2058         scsi_change_queue_depth(sdev, queue_depth);
2059
2060         return 0;
2061 }
2062
2063 static void hpsa_slave_destroy(struct scsi_device *sdev)
2064 {
2065         /* nothing to do. */
2066 }
2067
2068 static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2069 {
2070         int i;
2071
2072         if (!h->ioaccel2_cmd_sg_list)
2073                 return;
2074         for (i = 0; i < h->nr_cmds; i++) {
2075                 kfree(h->ioaccel2_cmd_sg_list[i]);
2076                 h->ioaccel2_cmd_sg_list[i] = NULL;
2077         }
2078         kfree(h->ioaccel2_cmd_sg_list);
2079         h->ioaccel2_cmd_sg_list = NULL;
2080 }
2081
2082 static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2083 {
2084         int i;
2085
2086         if (h->chainsize <= 0)
2087                 return 0;
2088
2089         h->ioaccel2_cmd_sg_list =
2090                 kzalloc(sizeof(*h->ioaccel2_cmd_sg_list) * h->nr_cmds,
2091                                         GFP_KERNEL);
2092         if (!h->ioaccel2_cmd_sg_list)
2093                 return -ENOMEM;
2094         for (i = 0; i < h->nr_cmds; i++) {
2095                 h->ioaccel2_cmd_sg_list[i] =
2096                         kmalloc(sizeof(*h->ioaccel2_cmd_sg_list[i]) *
2097                                         h->maxsgentries, GFP_KERNEL);
2098                 if (!h->ioaccel2_cmd_sg_list[i])
2099                         goto clean;
2100         }
2101         return 0;
2102
2103 clean:
2104         hpsa_free_ioaccel2_sg_chain_blocks(h);
2105         return -ENOMEM;
2106 }
2107
2108 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
2109 {
2110         int i;
2111
2112         if (!h->cmd_sg_list)
2113                 return;
2114         for (i = 0; i < h->nr_cmds; i++) {
2115                 kfree(h->cmd_sg_list[i]);
2116                 h->cmd_sg_list[i] = NULL;
2117         }
2118         kfree(h->cmd_sg_list);
2119         h->cmd_sg_list = NULL;
2120 }
2121
2122 static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2123 {
2124         int i;
2125
2126         if (h->chainsize <= 0)
2127                 return 0;
2128
2129         h->cmd_sg_list = kzalloc(sizeof(*h->cmd_sg_list) * h->nr_cmds,
2130                                 GFP_KERNEL);
2131         if (!h->cmd_sg_list) {
2132                 dev_err(&h->pdev->dev, "Failed to allocate SG list\n");
2133                 return -ENOMEM;
2134         }
2135         for (i = 0; i < h->nr_cmds; i++) {
2136                 h->cmd_sg_list[i] = kmalloc(sizeof(*h->cmd_sg_list[i]) *
2137                                                 h->chainsize, GFP_KERNEL);
2138                 if (!h->cmd_sg_list[i]) {
2139                         dev_err(&h->pdev->dev, "Failed to allocate cmd SG\n");
2140                         goto clean;
2141                 }
2142         }
2143         return 0;
2144
2145 clean:
2146         hpsa_free_sg_chain_blocks(h);
2147         return -ENOMEM;
2148 }
2149
2150 static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
2151         struct io_accel2_cmd *cp, struct CommandList *c)
2152 {
2153         struct ioaccel2_sg_element *chain_block;
2154         u64 temp64;
2155         u32 chain_size;
2156
2157         chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
2158         chain_size = le32_to_cpu(cp->sg[0].length);
2159         temp64 = pci_map_single(h->pdev, chain_block, chain_size,
2160                                 PCI_DMA_TODEVICE);
2161         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2162                 /* prevent subsequent unmapping */
2163                 cp->sg->address = 0;
2164                 return -1;
2165         }
2166         cp->sg->address = cpu_to_le64(temp64);
2167         return 0;
2168 }
2169
2170 static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
2171         struct io_accel2_cmd *cp)
2172 {
2173         struct ioaccel2_sg_element *chain_sg;
2174         u64 temp64;
2175         u32 chain_size;
2176
2177         chain_sg = cp->sg;
2178         temp64 = le64_to_cpu(chain_sg->address);
2179         chain_size = le32_to_cpu(cp->sg[0].length);
2180         pci_unmap_single(h->pdev, temp64, chain_size, PCI_DMA_TODEVICE);
2181 }
2182
2183 static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2184         struct CommandList *c)
2185 {
2186         struct SGDescriptor *chain_sg, *chain_block;
2187         u64 temp64;
2188         u32 chain_len;
2189
2190         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2191         chain_block = h->cmd_sg_list[c->cmdindex];
2192         chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
2193         chain_len = sizeof(*chain_sg) *
2194                 (le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2195         chain_sg->Len = cpu_to_le32(chain_len);
2196         temp64 = pci_map_single(h->pdev, chain_block, chain_len,
2197                                 PCI_DMA_TODEVICE);
2198         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2199                 /* prevent subsequent unmapping */
2200                 chain_sg->Addr = cpu_to_le64(0);
2201                 return -1;
2202         }
2203         chain_sg->Addr = cpu_to_le64(temp64);
2204         return 0;
2205 }
2206
2207 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
2208         struct CommandList *c)
2209 {
2210         struct SGDescriptor *chain_sg;
2211
2212         if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2213                 return;
2214
2215         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2216         pci_unmap_single(h->pdev, le64_to_cpu(chain_sg->Addr),
2217                         le32_to_cpu(chain_sg->Len), PCI_DMA_TODEVICE);
2218 }
2219
2220
2221 /* Decode the various types of errors on ioaccel2 path.
2222  * Return 1 for any error that should generate a RAID path retry.
2223  * Return 0 for errors that don't require a RAID path retry.
2224  */
2225 static int handle_ioaccel_mode2_error(struct ctlr_info *h,
2226                                         struct CommandList *c,
2227                                         struct scsi_cmnd *cmd,
2228                                         struct io_accel2_cmd *c2,
2229                                         struct hpsa_scsi_dev_t *dev)
2230 {
2231         int data_len;
2232         int retry = 0;
2233         u32 ioaccel2_resid = 0;
2234
2235         switch (c2->error_data.serv_response) {
2236         case IOACCEL2_SERV_RESPONSE_COMPLETE:
2237                 switch (c2->error_data.status) {
2238                 case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
2239                         break;
2240                 case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
2241                         cmd->result |= SAM_STAT_CHECK_CONDITION;
2242                         if (c2->error_data.data_present !=
2243                                         IOACCEL2_SENSE_DATA_PRESENT) {
2244                                 memset(cmd->sense_buffer, 0,
2245                                         SCSI_SENSE_BUFFERSIZE);
2246                                 break;
2247                         }
2248                         /* copy the sense data */
2249                         data_len = c2->error_data.sense_data_len;
2250                         if (data_len > SCSI_SENSE_BUFFERSIZE)
2251                                 data_len = SCSI_SENSE_BUFFERSIZE;
2252                         if (data_len > sizeof(c2->error_data.sense_data_buff))
2253                                 data_len =
2254                                         sizeof(c2->error_data.sense_data_buff);
2255                         memcpy(cmd->sense_buffer,
2256                                 c2->error_data.sense_data_buff, data_len);
2257                         retry = 1;
2258                         break;
2259                 case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2260                         retry = 1;
2261                         break;
2262                 case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2263                         retry = 1;
2264                         break;
2265                 case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2266                         retry = 1;
2267                         break;
2268                 case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2269                         retry = 1;
2270                         break;
2271                 default:
2272                         retry = 1;
2273                         break;
2274                 }
2275                 break;
2276         case IOACCEL2_SERV_RESPONSE_FAILURE:
2277                 switch (c2->error_data.status) {
2278                 case IOACCEL2_STATUS_SR_IO_ERROR:
2279                 case IOACCEL2_STATUS_SR_IO_ABORTED:
2280                 case IOACCEL2_STATUS_SR_OVERRUN:
2281                         retry = 1;
2282                         break;
2283                 case IOACCEL2_STATUS_SR_UNDERRUN:
2284                         cmd->result = (DID_OK << 16);           /* host byte */
2285                         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2286                         ioaccel2_resid = get_unaligned_le32(
2287                                                 &c2->error_data.resid_cnt[0]);
2288                         scsi_set_resid(cmd, ioaccel2_resid);
2289                         break;
2290                 case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
2291                 case IOACCEL2_STATUS_SR_INVALID_DEVICE:
2292                 case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
2293                         /*
2294                          * Did an HBA disk disappear? We will eventually
2295                          * get a state change event from the controller but
2296                          * in the meantime, we need to tell the OS that the
2297                          * HBA disk is no longer there and stop I/O
2298                          * from going down. This allows the potential re-insert
2299                          * of the disk to get the same device node.
2300                          */
2301                         if (dev->physical_device && dev->expose_device) {
2302                                 cmd->result = DID_NO_CONNECT << 16;
2303                                 dev->removed = 1;
2304                                 h->drv_req_rescan = 1;
2305                                 dev_warn(&h->pdev->dev,
2306                                         "%s: device is gone!\n", __func__);
2307                         } else
2308                                 /*
2309                                  * Retry by sending down the RAID path.
2310                                  * We will get an event from ctlr to
2311                                  * trigger rescan regardless.
2312                                  */
2313                                 retry = 1;
2314                         break;
2315                 default:
2316                         retry = 1;
2317                 }
2318                 break;
2319         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
2320                 break;
2321         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
2322                 break;
2323         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2324                 retry = 1;
2325                 break;
2326         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
2327                 break;
2328         default:
2329                 retry = 1;
2330                 break;
2331         }
2332
2333         return retry;   /* retry on raid path? */
2334 }
2335
2336 static void hpsa_cmd_resolve_events(struct ctlr_info *h,
2337                 struct CommandList *c)
2338 {
2339         bool do_wake = false;
2340
2341         /*
2342          * Prevent the following race in the abort handler:
2343          *
2344          * 1. LLD is requested to abort a SCSI command
2345          * 2. The SCSI command completes
2346          * 3. The struct CommandList associated with step 2 is made available
2347          * 4. New I/O request to LLD to another LUN re-uses struct CommandList
2348          * 5. Abort handler follows scsi_cmnd->host_scribble and
2349          *    finds struct CommandList and tries to aborts it
2350          * Now we have aborted the wrong command.
2351          *
2352          * Reset c->scsi_cmd here so that the abort or reset handler will know
2353          * this command has completed.  Then, check to see if the handler is
2354          * waiting for this command, and, if so, wake it.
2355          */
2356         c->scsi_cmd = SCSI_CMD_IDLE;
2357         mb();   /* Declare command idle before checking for pending events. */
2358         if (c->abort_pending) {
2359                 do_wake = true;
2360                 c->abort_pending = false;
2361         }
2362         if (c->reset_pending) {
2363                 unsigned long flags;
2364                 struct hpsa_scsi_dev_t *dev;
2365
2366                 /*
2367                  * There appears to be a reset pending; lock the lock and
2368                  * reconfirm.  If so, then decrement the count of outstanding
2369                  * commands and wake the reset command if this is the last one.
2370                  */
2371                 spin_lock_irqsave(&h->lock, flags);
2372                 dev = c->reset_pending;         /* Re-fetch under the lock. */
2373                 if (dev && atomic_dec_and_test(&dev->reset_cmds_out))
2374                         do_wake = true;
2375                 c->reset_pending = NULL;
2376                 spin_unlock_irqrestore(&h->lock, flags);
2377         }
2378
2379         if (do_wake)
2380                 wake_up_all(&h->event_sync_wait_queue);
2381 }
2382
2383 static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
2384                                       struct CommandList *c)
2385 {
2386         hpsa_cmd_resolve_events(h, c);
2387         cmd_tagged_free(h, c);
2388 }
2389
2390 static void hpsa_cmd_free_and_done(struct ctlr_info *h,
2391                 struct CommandList *c, struct scsi_cmnd *cmd)
2392 {
2393         hpsa_cmd_resolve_and_free(h, c);
2394         if (cmd && cmd->scsi_done)
2395                 cmd->scsi_done(cmd);
2396 }
2397
2398 static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
2399 {
2400         INIT_WORK(&c->work, hpsa_command_resubmit_worker);
2401         queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
2402 }
2403
2404 static void hpsa_set_scsi_cmd_aborted(struct scsi_cmnd *cmd)
2405 {
2406         cmd->result = DID_ABORT << 16;
2407 }
2408
2409 static void hpsa_cmd_abort_and_free(struct ctlr_info *h, struct CommandList *c,
2410                                     struct scsi_cmnd *cmd)
2411 {
2412         hpsa_set_scsi_cmd_aborted(cmd);
2413         dev_warn(&h->pdev->dev, "CDB %16phN was aborted with status 0x%x\n",
2414                          c->Request.CDB, c->err_info->ScsiStatus);
2415         hpsa_cmd_resolve_and_free(h, c);
2416 }
2417
2418 static void process_ioaccel2_completion(struct ctlr_info *h,
2419                 struct CommandList *c, struct scsi_cmnd *cmd,
2420                 struct hpsa_scsi_dev_t *dev)
2421 {
2422         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2423
2424         /* check for good status */
2425         if (likely(c2->error_data.serv_response == 0 &&
2426                         c2->error_data.status == 0))
2427                 return hpsa_cmd_free_and_done(h, c, cmd);
2428
2429         /*
2430          * Any RAID offload error results in retry which will use
2431          * the normal I/O path so the controller can handle whatever's
2432          * wrong.
2433          */
2434         if (is_logical_device(dev) &&
2435                 c2->error_data.serv_response ==
2436                         IOACCEL2_SERV_RESPONSE_FAILURE) {
2437                 if (c2->error_data.status ==
2438                         IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2439                         dev->offload_enabled = 0;
2440                         dev->offload_to_be_enabled = 0;
2441                 }
2442
2443                 return hpsa_retry_cmd(h, c);
2444         }
2445
2446         if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2447                 return hpsa_retry_cmd(h, c);
2448
2449         return hpsa_cmd_free_and_done(h, c, cmd);
2450 }
2451
2452 /* Returns 0 on success, < 0 otherwise. */
2453 static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
2454                                         struct CommandList *cp)
2455 {
2456         u8 tmf_status = cp->err_info->ScsiStatus;
2457
2458         switch (tmf_status) {
2459         case CISS_TMF_COMPLETE:
2460                 /*
2461                  * CISS_TMF_COMPLETE never happens, instead,
2462                  * ei->CommandStatus == 0 for this case.
2463                  */
2464         case CISS_TMF_SUCCESS:
2465                 return 0;
2466         case CISS_TMF_INVALID_FRAME:
2467         case CISS_TMF_NOT_SUPPORTED:
2468         case CISS_TMF_FAILED:
2469         case CISS_TMF_WRONG_LUN:
2470         case CISS_TMF_OVERLAPPED_TAG:
2471                 break;
2472         default:
2473                 dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
2474                                 tmf_status);
2475                 break;
2476         }
2477         return -tmf_status;
2478 }
2479
2480 static void complete_scsi_command(struct CommandList *cp)
2481 {
2482         struct scsi_cmnd *cmd;
2483         struct ctlr_info *h;
2484         struct ErrorInfo *ei;
2485         struct hpsa_scsi_dev_t *dev;
2486         struct io_accel2_cmd *c2;
2487
2488         u8 sense_key;
2489         u8 asc;      /* additional sense code */
2490         u8 ascq;     /* additional sense code qualifier */
2491         unsigned long sense_data_size;
2492
2493         ei = cp->err_info;
2494         cmd = cp->scsi_cmd;
2495         h = cp->h;
2496
2497         if (!cmd->device) {
2498                 cmd->result = DID_NO_CONNECT << 16;
2499                 return hpsa_cmd_free_and_done(h, cp, cmd);
2500         }
2501
2502         dev = cmd->device->hostdata;
2503         if (!dev) {
2504                 cmd->result = DID_NO_CONNECT << 16;
2505                 return hpsa_cmd_free_and_done(h, cp, cmd);
2506         }
2507         c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2508
2509         scsi_dma_unmap(cmd); /* undo the DMA mappings */
2510         if ((cp->cmd_type == CMD_SCSI) &&
2511                 (le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2512                 hpsa_unmap_sg_chain_block(h, cp);
2513
2514         if ((cp->cmd_type == CMD_IOACCEL2) &&
2515                 (c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
2516                 hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
2517
2518         cmd->result = (DID_OK << 16);           /* host byte */
2519         cmd->result |= (COMMAND_COMPLETE << 8); /* msg byte */
2520
2521         if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
2522                 if (dev->physical_device && dev->expose_device &&
2523                         dev->removed) {
2524                         cmd->result = DID_NO_CONNECT << 16;
2525                         return hpsa_cmd_free_and_done(h, cp, cmd);
2526                 }
2527                 if (likely(cp->phys_disk != NULL))
2528                         atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
2529         }
2530
2531         /*
2532          * We check for lockup status here as it may be set for
2533          * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
2534          * fail_all_oustanding_cmds()
2535          */
2536         if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
2537                 /* DID_NO_CONNECT will prevent a retry */
2538                 cmd->result = DID_NO_CONNECT << 16;
2539                 return hpsa_cmd_free_and_done(h, cp, cmd);
2540         }
2541
2542         if ((unlikely(hpsa_is_pending_event(cp)))) {
2543                 if (cp->reset_pending)
2544                         return hpsa_cmd_resolve_and_free(h, cp);
2545                 if (cp->abort_pending)
2546                         return hpsa_cmd_abort_and_free(h, cp, cmd);
2547         }
2548
2549         if (cp->cmd_type == CMD_IOACCEL2)
2550                 return process_ioaccel2_completion(h, cp, cmd, dev);
2551
2552         scsi_set_resid(cmd, ei->ResidualCnt);
2553         if (ei->CommandStatus == 0)
2554                 return hpsa_cmd_free_and_done(h, cp, cmd);
2555
2556         /* For I/O accelerator commands, copy over some fields to the normal
2557          * CISS header used below for error handling.
2558          */
2559         if (cp->cmd_type == CMD_IOACCEL1) {
2560                 struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
2561                 cp->Header.SGList = scsi_sg_count(cmd);
2562                 cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
2563                 cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
2564                         IOACCEL1_IOFLAGS_CDBLEN_MASK;
2565                 cp->Header.tag = c->tag;
2566                 memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
2567                 memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2568
2569                 /* Any RAID offload error results in retry which will use
2570                  * the normal I/O path so the controller can handle whatever's
2571                  * wrong.
2572                  */
2573                 if (is_logical_device(dev)) {
2574                         if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
2575                                 dev->offload_enabled = 0;
2576                         return hpsa_retry_cmd(h, cp);
2577                 }
2578         }
2579
2580         /* an error has occurred */
2581         switch (ei->CommandStatus) {
2582
2583         case CMD_TARGET_STATUS:
2584                 cmd->result |= ei->ScsiStatus;
2585                 /* copy the sense data */
2586                 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
2587                         sense_data_size = SCSI_SENSE_BUFFERSIZE;
2588                 else
2589                         sense_data_size = sizeof(ei->SenseInfo);
2590                 if (ei->SenseLen < sense_data_size)
2591                         sense_data_size = ei->SenseLen;
2592                 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
2593                 if (ei->ScsiStatus)
2594                         decode_sense_data(ei->SenseInfo, sense_data_size,
2595                                 &sense_key, &asc, &ascq);
2596                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2597                         if (sense_key == ABORTED_COMMAND) {
2598                                 cmd->result |= DID_SOFT_ERROR << 16;
2599                                 break;
2600                         }
2601                         break;
2602                 }
2603                 /* Problem was not a check condition
2604                  * Pass it up to the upper layers...
2605                  */
2606                 if (ei->ScsiStatus) {
2607                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
2608                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
2609                                 "Returning result: 0x%x\n",
2610                                 cp, ei->ScsiStatus,
2611                                 sense_key, asc, ascq,
2612                                 cmd->result);
2613                 } else {  /* scsi status is zero??? How??? */
2614                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
2615                                 "Returning no connection.\n", cp),
2616
2617                         /* Ordinarily, this case should never happen,
2618                          * but there is a bug in some released firmware
2619                          * revisions that allows it to happen if, for
2620                          * example, a 4100 backplane loses power and
2621                          * the tape drive is in it.  We assume that
2622                          * it's a fatal error of some kind because we
2623                          * can't show that it wasn't. We will make it
2624                          * look like selection timeout since that is
2625                          * the most common reason for this to occur,
2626                          * and it's severe enough.
2627                          */
2628
2629                         cmd->result = DID_NO_CONNECT << 16;
2630                 }
2631                 break;
2632
2633         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2634                 break;
2635         case CMD_DATA_OVERRUN:
2636                 dev_warn(&h->pdev->dev,
2637                         "CDB %16phN data overrun\n", cp->Request.CDB);
2638                 break;
2639         case CMD_INVALID: {
2640                 /* print_bytes(cp, sizeof(*cp), 1, 0);
2641                 print_cmd(cp); */
2642                 /* We get CMD_INVALID if you address a non-existent device
2643                  * instead of a selection timeout (no response).  You will
2644                  * see this if you yank out a drive, then try to access it.
2645                  * This is kind of a shame because it means that any other
2646                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
2647                  * missing target. */
2648                 cmd->result = DID_NO_CONNECT << 16;
2649         }
2650                 break;
2651         case CMD_PROTOCOL_ERR:
2652                 cmd->result = DID_ERROR << 16;
2653                 dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
2654                                 cp->Request.CDB);
2655                 break;
2656         case CMD_HARDWARE_ERR:
2657                 cmd->result = DID_ERROR << 16;
2658                 dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
2659                         cp->Request.CDB);
2660                 break;
2661         case CMD_CONNECTION_LOST:
2662                 cmd->result = DID_ERROR << 16;
2663                 dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
2664                         cp->Request.CDB);
2665                 break;
2666         case CMD_ABORTED:
2667                 /* Return now to avoid calling scsi_done(). */
2668                 return hpsa_cmd_abort_and_free(h, cp, cmd);
2669         case CMD_ABORT_FAILED:
2670                 cmd->result = DID_ERROR << 16;
2671                 dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
2672                         cp->Request.CDB);
2673                 break;
2674         case CMD_UNSOLICITED_ABORT:
2675                 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2676                 dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
2677                         cp->Request.CDB);
2678                 break;
2679         case CMD_TIMEOUT:
2680                 cmd->result = DID_TIME_OUT << 16;
2681                 dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
2682                         cp->Request.CDB);
2683                 break;
2684         case CMD_UNABORTABLE:
2685                 cmd->result = DID_ERROR << 16;
2686                 dev_warn(&h->pdev->dev, "Command unabortable\n");
2687                 break;
2688         case CMD_TMF_STATUS:
2689                 if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
2690                         cmd->result = DID_ERROR << 16;
2691                 break;
2692         case CMD_IOACCEL_DISABLED:
2693                 /* This only handles the direct pass-through case since RAID
2694                  * offload is handled above.  Just attempt a retry.
2695                  */
2696                 cmd->result = DID_SOFT_ERROR << 16;
2697                 dev_warn(&h->pdev->dev,
2698                                 "cp %p had HP SSD Smart Path error\n", cp);
2699                 break;
2700         default:
2701                 cmd->result = DID_ERROR << 16;
2702                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
2703                                 cp, ei->CommandStatus);
2704         }
2705
2706         return hpsa_cmd_free_and_done(h, cp, cmd);
2707 }
2708
2709 static void hpsa_pci_unmap(struct pci_dev *pdev,
2710         struct CommandList *c, int sg_used, int data_direction)
2711 {
2712         int i;
2713
2714         for (i = 0; i < sg_used; i++)
2715                 pci_unmap_single(pdev, (dma_addr_t) le64_to_cpu(c->SG[i].Addr),
2716                                 le32_to_cpu(c->SG[i].Len),
2717                                 data_direction);
2718 }
2719
2720 static int hpsa_map_one(struct pci_dev *pdev,
2721                 struct CommandList *cp,
2722                 unsigned char *buf,
2723                 size_t buflen,
2724                 int data_direction)
2725 {
2726         u64 addr64;
2727
2728         if (buflen == 0 || data_direction == PCI_DMA_NONE) {
2729                 cp->Header.SGList = 0;
2730                 cp->Header.SGTotal = cpu_to_le16(0);
2731                 return 0;
2732         }
2733
2734         addr64 = pci_map_single(pdev, buf, buflen, data_direction);
2735         if (dma_mapping_error(&pdev->dev, addr64)) {
2736                 /* Prevent subsequent unmap of something never mapped */
2737                 cp->Header.SGList = 0;
2738                 cp->Header.SGTotal = cpu_to_le16(0);
2739                 return -1;
2740         }
2741         cp->SG[0].Addr = cpu_to_le64(addr64);
2742         cp->SG[0].Len = cpu_to_le32(buflen);
2743         cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
2744         cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
2745         cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2746         return 0;
2747 }
2748
2749 #define NO_TIMEOUT ((unsigned long) -1)
2750 #define DEFAULT_TIMEOUT 30000 /* milliseconds */
2751 static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
2752         struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2753 {
2754         DECLARE_COMPLETION_ONSTACK(wait);
2755
2756         c->waiting = &wait;
2757         __enqueue_cmd_and_start_io(h, c, reply_queue);
2758         if (timeout_msecs == NO_TIMEOUT) {
2759                 /* TODO: get rid of this no-timeout thing */
2760                 wait_for_completion_io(&wait);
2761                 return IO_OK;
2762         }
2763         if (!wait_for_completion_io_timeout(&wait,
2764                                         msecs_to_jiffies(timeout_msecs))) {
2765                 dev_warn(&h->pdev->dev, "Command timed out.\n");
2766                 return -ETIMEDOUT;
2767         }
2768         return IO_OK;
2769 }
2770
2771 static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
2772                                    int reply_queue, unsigned long timeout_msecs)
2773 {
2774         if (unlikely(lockup_detected(h))) {
2775                 c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
2776                 return IO_OK;
2777         }
2778         return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2779 }
2780
2781 static u32 lockup_detected(struct ctlr_info *h)
2782 {
2783         int cpu;
2784         u32 rc, *lockup_detected;
2785
2786         cpu = get_cpu();
2787         lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
2788         rc = *lockup_detected;
2789         put_cpu();
2790         return rc;
2791 }
2792
2793 #define MAX_DRIVER_CMD_RETRIES 25
2794 static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
2795         struct CommandList *c, int data_direction, unsigned long timeout_msecs)
2796 {
2797         int backoff_time = 10, retry_count = 0;
2798         int rc;
2799
2800         do {
2801                 memset(c->err_info, 0, sizeof(*c->err_info));
2802                 rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
2803                                                   timeout_msecs);
2804                 if (rc)
2805                         break;
2806                 retry_count++;
2807                 if (retry_count > 3) {
2808                         msleep(backoff_time);
2809                         if (backoff_time < 1000)
2810                                 backoff_time *= 2;
2811                 }
2812         } while ((check_for_unit_attention(h, c) ||
2813                         check_for_busy(h, c)) &&
2814                         retry_count <= MAX_DRIVER_CMD_RETRIES);
2815         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2816         if (retry_count > MAX_DRIVER_CMD_RETRIES)
2817                 rc = -EIO;
2818         return rc;
2819 }
2820
2821 static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
2822                                 struct CommandList *c)
2823 {
2824         const u8 *cdb = c->Request.CDB;
2825         const u8 *lun = c->Header.LUN.LunAddrBytes;
2826
2827         dev_warn(&h->pdev->dev, "%s: LUN:%02x%02x%02x%02x%02x%02x%02x%02x"
2828         " CDB:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
2829                 txt, lun[0], lun[1], lun[2], lun[3],
2830                 lun[4], lun[5], lun[6], lun[7],
2831                 cdb[0], cdb[1], cdb[2], cdb[3],
2832                 cdb[4], cdb[5], cdb[6], cdb[7],
2833                 cdb[8], cdb[9], cdb[10], cdb[11],
2834                 cdb[12], cdb[13], cdb[14], cdb[15]);
2835 }
2836
2837 static void hpsa_scsi_interpret_error(struct ctlr_info *h,
2838                         struct CommandList *cp)
2839 {
2840         const struct ErrorInfo *ei = cp->err_info;
2841         struct device *d = &cp->h->pdev->dev;
2842         u8 sense_key, asc, ascq;
2843         int sense_len;
2844
2845         switch (ei->CommandStatus) {
2846         case CMD_TARGET_STATUS:
2847                 if (ei->SenseLen > sizeof(ei->SenseInfo))
2848                         sense_len = sizeof(ei->SenseInfo);
2849                 else
2850                         sense_len = ei->SenseLen;
2851                 decode_sense_data(ei->SenseInfo, sense_len,
2852                                         &sense_key, &asc, &ascq);
2853                 hpsa_print_cmd(h, "SCSI status", cp);
2854                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2855                         dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
2856                                 sense_key, asc, ascq);
2857                 else
2858                         dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2859                 if (ei->ScsiStatus == 0)
2860                         dev_warn(d, "SCSI status is abnormally zero.  "
2861                         "(probably indicates selection timeout "
2862                         "reported incorrectly due to a known "
2863                         "firmware bug, circa July, 2001.)\n");
2864                 break;
2865         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2866                 break;
2867         case CMD_DATA_OVERRUN:
2868                 hpsa_print_cmd(h, "overrun condition", cp);
2869                 break;
2870         case CMD_INVALID: {
2871                 /* controller unfortunately reports SCSI passthru's
2872                  * to non-existent targets as invalid commands.
2873                  */
2874                 hpsa_print_cmd(h, "invalid command", cp);
2875                 dev_warn(d, "probably means device no longer present\n");
2876                 }
2877                 break;
2878         case CMD_PROTOCOL_ERR:
2879                 hpsa_print_cmd(h, "protocol error", cp);
2880                 break;
2881         case CMD_HARDWARE_ERR:
2882                 hpsa_print_cmd(h, "hardware error", cp);
2883                 break;
2884         case CMD_CONNECTION_LOST:
2885                 hpsa_print_cmd(h, "connection lost", cp);
2886                 break;
2887         case CMD_ABORTED:
2888                 hpsa_print_cmd(h, "aborted", cp);
2889                 break;
2890         case CMD_ABORT_FAILED:
2891                 hpsa_print_cmd(h, "abort failed", cp);
2892                 break;
2893         case CMD_UNSOLICITED_ABORT:
2894                 hpsa_print_cmd(h, "unsolicited abort", cp);
2895                 break;
2896         case CMD_TIMEOUT:
2897                 hpsa_print_cmd(h, "timed out", cp);
2898                 break;
2899         case CMD_UNABORTABLE:
2900                 hpsa_print_cmd(h, "unabortable", cp);
2901                 break;
2902         case CMD_CTLR_LOCKUP:
2903                 hpsa_print_cmd(h, "controller lockup detected", cp);
2904                 break;
2905         default:
2906                 hpsa_print_cmd(h, "unknown status", cp);
2907                 dev_warn(d, "Unknown command status %x\n",
2908                                 ei->CommandStatus);
2909         }
2910 }
2911
2912 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
2913                         u16 page, unsigned char *buf,
2914                         unsigned char bufsize)
2915 {
2916         int rc = IO_OK;
2917         struct CommandList *c;
2918         struct ErrorInfo *ei;
2919
2920         c = cmd_alloc(h);
2921
2922         if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
2923                         page, scsi3addr, TYPE_CMD)) {
2924                 rc = -1;
2925                 goto out;
2926         }
2927         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
2928                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
2929         if (rc)
2930                 goto out;
2931         ei = c->err_info;
2932         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
2933                 hpsa_scsi_interpret_error(h, c);
2934                 rc = -1;
2935         }
2936 out:
2937         cmd_free(h, c);
2938         return rc;
2939 }
2940
2941 static int hpsa_send_reset(struct ctlr_info *h, unsigned char *scsi3addr,
2942         u8 reset_type, int reply_queue)
2943 {
2944         int rc = IO_OK;
2945         struct CommandList *c;
2946         struct ErrorInfo *ei;
2947
2948         c = cmd_alloc(h);
2949
2950
2951         /* fill_cmd can't fail here, no data buffer to map. */
2952         (void) fill_cmd(c, reset_type, h, NULL, 0, 0,
2953                         scsi3addr, TYPE_MSG);
2954         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
2955         if (rc) {
2956                 dev_warn(&h->pdev->dev, "Failed to send reset command\n");
2957                 goto out;
2958         }
2959         /* no unmap needed here because no data xfer. */
2960
2961         ei = c->err_info;
2962         if (ei->CommandStatus != 0) {
2963                 hpsa_scsi_interpret_error(h, c);
2964                 rc = -1;
2965         }
2966 out:
2967         cmd_free(h, c);
2968         return rc;
2969 }
2970
2971 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
2972                                struct hpsa_scsi_dev_t *dev,
2973                                unsigned char *scsi3addr)
2974 {
2975         int i;
2976         bool match = false;
2977         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2978         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
2979
2980         if (hpsa_is_cmd_idle(c))
2981                 return false;
2982
2983         switch (c->cmd_type) {
2984         case CMD_SCSI:
2985         case CMD_IOCTL_PEND:
2986                 match = !memcmp(scsi3addr, &c->Header.LUN.LunAddrBytes,
2987                                 sizeof(c->Header.LUN.LunAddrBytes));
2988                 break;
2989
2990         case CMD_IOACCEL1:
2991         case CMD_IOACCEL2:
2992                 if (c->phys_disk == dev) {
2993                         /* HBA mode match */
2994                         match = true;
2995                 } else {
2996                         /* Possible RAID mode -- check each phys dev. */
2997                         /* FIXME:  Do we need to take out a lock here?  If
2998                          * so, we could just call hpsa_get_pdisk_of_ioaccel2()
2999                          * instead. */
3000                         for (i = 0; i < dev->nphysical_disks && !match; i++) {
3001                                 /* FIXME: an alternate test might be
3002                                  *
3003                                  * match = dev->phys_disk[i]->ioaccel_handle
3004                                  *              == c2->scsi_nexus;      */
3005                                 match = dev->phys_disk[i] == c->phys_disk;
3006                         }
3007                 }
3008                 break;
3009
3010         case IOACCEL2_TMF:
3011                 for (i = 0; i < dev->nphysical_disks && !match; i++) {
3012                         match = dev->phys_disk[i]->ioaccel_handle ==
3013                                         le32_to_cpu(ac->it_nexus);
3014                 }
3015                 break;
3016
3017         case 0:         /* The command is in the middle of being initialized. */
3018                 match = false;
3019                 break;
3020
3021         default:
3022                 dev_err(&h->pdev->dev, "unexpected cmd_type: %d\n",
3023                         c->cmd_type);
3024                 BUG();
3025         }
3026
3027         return match;
3028 }
3029
3030 static int hpsa_do_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3031         unsigned char *scsi3addr, u8 reset_type, int reply_queue)
3032 {
3033         int i;
3034         int rc = 0;
3035
3036         /* We can really only handle one reset at a time */
3037         if (mutex_lock_interruptible(&h->reset_mutex) == -EINTR) {
3038                 dev_warn(&h->pdev->dev, "concurrent reset wait interrupted.\n");
3039                 return -EINTR;
3040         }
3041
3042         BUG_ON(atomic_read(&dev->reset_cmds_out) != 0);
3043
3044         for (i = 0; i < h->nr_cmds; i++) {
3045                 struct CommandList *c = h->cmd_pool + i;
3046                 int refcount = atomic_inc_return(&c->refcount);
3047
3048                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev, scsi3addr)) {
3049                         unsigned long flags;
3050
3051                         /*
3052                          * Mark the target command as having a reset pending,
3053                          * then lock a lock so that the command cannot complete
3054                          * while we're considering it.  If the command is not
3055                          * idle then count it; otherwise revoke the event.
3056                          */
3057                         c->reset_pending = dev;
3058                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
3059                         if (!hpsa_is_cmd_idle(c))
3060                                 atomic_inc(&dev->reset_cmds_out);
3061                         else
3062                                 c->reset_pending = NULL;
3063                         spin_unlock_irqrestore(&h->lock, flags);
3064                 }
3065
3066                 cmd_free(h, c);
3067         }
3068
3069         rc = hpsa_send_reset(h, scsi3addr, reset_type, reply_queue);
3070         if (!rc)
3071                 wait_event(h->event_sync_wait_queue,
3072                         atomic_read(&dev->reset_cmds_out) == 0 ||
3073                         lockup_detected(h));
3074
3075         if (unlikely(lockup_detected(h))) {
3076                 dev_warn(&h->pdev->dev,
3077                          "Controller lockup detected during reset wait\n");
3078                 rc = -ENODEV;
3079         }
3080
3081         if (unlikely(rc))
3082                 atomic_set(&dev->reset_cmds_out, 0);
3083
3084         mutex_unlock(&h->reset_mutex);
3085         return rc;
3086 }
3087
3088 static void hpsa_get_raid_level(struct ctlr_info *h,
3089         unsigned char *scsi3addr, unsigned char *raid_level)
3090 {
3091         int rc;
3092         unsigned char *buf;
3093
3094         *raid_level = RAID_UNKNOWN;
3095         buf = kzalloc(64, GFP_KERNEL);
3096         if (!buf)
3097                 return;
3098
3099         if (!hpsa_vpd_page_supported(h, scsi3addr,
3100                 HPSA_VPD_LV_DEVICE_GEOMETRY))
3101                 goto exit;
3102
3103         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3104                 HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);
3105
3106         if (rc == 0)
3107                 *raid_level = buf[8];
3108         if (*raid_level > RAID_UNKNOWN)
3109                 *raid_level = RAID_UNKNOWN;
3110 exit:
3111         kfree(buf);
3112         return;
3113 }
3114
3115 #define HPSA_MAP_DEBUG
3116 #ifdef HPSA_MAP_DEBUG
3117 static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
3118                                 struct raid_map_data *map_buff)
3119 {
3120         struct raid_map_disk_data *dd = &map_buff->data[0];
3121         int map, row, col;
3122         u16 map_cnt, row_cnt, disks_per_row;
3123
3124         if (rc != 0)
3125                 return;
3126
3127         /* Show details only if debugging has been activated. */
3128         if (h->raid_offload_debug < 2)
3129                 return;
3130
3131         dev_info(&h->pdev->dev, "structure_size = %u\n",
3132                                 le32_to_cpu(map_buff->structure_size));
3133         dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
3134                         le32_to_cpu(map_buff->volume_blk_size));
3135         dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
3136                         le64_to_cpu(map_buff->volume_blk_cnt));
3137         dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
3138                         map_buff->phys_blk_shift);
3139         dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
3140                         map_buff->parity_rotation_shift);
3141         dev_info(&h->pdev->dev, "strip_size = %u\n",
3142                         le16_to_cpu(map_buff->strip_size));
3143         dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
3144                         le64_to_cpu(map_buff->disk_starting_blk));
3145         dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
3146                         le64_to_cpu(map_buff->disk_blk_cnt));
3147         dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
3148                         le16_to_cpu(map_buff->data_disks_per_row));
3149         dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
3150                         le16_to_cpu(map_buff->metadata_disks_per_row));
3151         dev_info(&h->pdev->dev, "row_cnt = %u\n",
3152                         le16_to_cpu(map_buff->row_cnt));
3153         dev_info(&h->pdev->dev, "layout_map_count = %u\n",
3154                         le16_to_cpu(map_buff->layout_map_count));
3155         dev_info(&h->pdev->dev, "flags = 0x%x\n",
3156                         le16_to_cpu(map_buff->flags));
3157         dev_info(&h->pdev->dev, "encrypytion = %s\n",
3158                         le16_to_cpu(map_buff->flags) &
3159                         RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3160         dev_info(&h->pdev->dev, "dekindex = %u\n",
3161                         le16_to_cpu(map_buff->dekindex));
3162         map_cnt = le16_to_cpu(map_buff->layout_map_count);
3163         for (map = 0; map < map_cnt; map++) {
3164                 dev_info(&h->pdev->dev, "Map%u:\n", map);
3165                 row_cnt = le16_to_cpu(map_buff->row_cnt);
3166                 for (row = 0; row < row_cnt; row++) {
3167                         dev_info(&h->pdev->dev, "  Row%u:\n", row);
3168                         disks_per_row =
3169                                 le16_to_cpu(map_buff->data_disks_per_row);
3170                         for (col = 0; col < disks_per_row; col++, dd++)
3171                                 dev_info(&h->pdev->dev,
3172                                         "    D%02u: h=0x%04x xor=%u,%u\n",
3173                                         col, dd->ioaccel_handle,
3174                                         dd->xor_mult[0], dd->xor_mult[1]);
3175                         disks_per_row =
3176                                 le16_to_cpu(map_buff->metadata_disks_per_row);
3177                         for (col = 0; col < disks_per_row; col++, dd++)
3178                                 dev_info(&h->pdev->dev,
3179                                         "    M%02u: h=0x%04x xor=%u,%u\n",
3180                                         col, dd->ioaccel_handle,
3181                                         dd->xor_mult[0], dd->xor_mult[1]);
3182                 }
3183         }
3184 }
3185 #else
3186 static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
3187                         __attribute__((unused)) int rc,
3188                         __attribute__((unused)) struct raid_map_data *map_buff)
3189 {
3190 }
3191 #endif
3192
3193 static int hpsa_get_raid_map(struct ctlr_info *h,
3194         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3195 {
3196         int rc = 0;
3197         struct CommandList *c;
3198         struct ErrorInfo *ei;
3199
3200         c = cmd_alloc(h);
3201
3202         if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
3203                         sizeof(this_device->raid_map), 0,
3204                         scsi3addr, TYPE_CMD)) {
3205                 dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
3206                 cmd_free(h, c);
3207                 return -1;
3208         }
3209         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3210                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3211         if (rc)
3212                 goto out;
3213         ei = c->err_info;
3214         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3215                 hpsa_scsi_interpret_error(h, c);
3216                 rc = -1;
3217                 goto out;
3218         }
3219         cmd_free(h, c);
3220
3221         /* @todo in the future, dynamically allocate RAID map memory */
3222         if (le32_to_cpu(this_device->raid_map.structure_size) >
3223                                 sizeof(this_device->raid_map)) {
3224                 dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
3225                 rc = -1;
3226         }
3227         hpsa_debug_map_buff(h, rc, &this_device->raid_map);
3228         return rc;
3229 out:
3230         cmd_free(h, c);
3231         return rc;
3232 }
3233
3234 static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
3235                 unsigned char scsi3addr[], u16 bmic_device_index,
3236                 struct bmic_sense_subsystem_info *buf, size_t bufsize)
3237 {
3238         int rc = IO_OK;
3239         struct CommandList *c;
3240         struct ErrorInfo *ei;
3241
3242         c = cmd_alloc(h);
3243
3244         rc = fill_cmd(c, BMIC_SENSE_SUBSYSTEM_INFORMATION, h, buf, bufsize,
3245                 0, RAID_CTLR_LUNID, TYPE_CMD);
3246         if (rc)
3247                 goto out;
3248
3249         c->Request.CDB[2] = bmic_device_index & 0xff;
3250         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3251
3252         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3253                                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3254         if (rc)
3255                 goto out;
3256         ei = c->err_info;
3257         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3258                 hpsa_scsi_interpret_error(h, c);
3259                 rc = -1;
3260         }
3261 out:
3262         cmd_free(h, c);
3263         return rc;
3264 }
3265
3266 static int hpsa_bmic_id_controller(struct ctlr_info *h,
3267         struct bmic_identify_controller *buf, size_t bufsize)
3268 {
3269         int rc = IO_OK;
3270         struct CommandList *c;
3271         struct ErrorInfo *ei;
3272
3273         c = cmd_alloc(h);
3274
3275         rc = fill_cmd(c, BMIC_IDENTIFY_CONTROLLER, h, buf, bufsize,
3276                 0, RAID_CTLR_LUNID, TYPE_CMD);
3277         if (rc)
3278                 goto out;
3279
3280         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3281                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3282         if (rc)
3283                 goto out;
3284         ei = c->err_info;
3285         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3286                 hpsa_scsi_interpret_error(h, c);
3287                 rc = -1;
3288         }
3289 out:
3290         cmd_free(h, c);
3291         return rc;
3292 }
3293
3294 static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
3295                 unsigned char scsi3addr[], u16 bmic_device_index,
3296                 struct bmic_identify_physical_device *buf, size_t bufsize)
3297 {
3298         int rc = IO_OK;
3299         struct CommandList *c;
3300         struct ErrorInfo *ei;
3301
3302         c = cmd_alloc(h);
3303         rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
3304                 0, RAID_CTLR_LUNID, TYPE_CMD);
3305         if (rc)
3306                 goto out;
3307
3308         c->Request.CDB[2] = bmic_device_index & 0xff;
3309         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3310
3311         hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3312                                                 DEFAULT_TIMEOUT);
3313         ei = c->err_info;
3314         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3315                 hpsa_scsi_interpret_error(h, c);
3316                 rc = -1;
3317         }
3318 out:
3319         cmd_free(h, c);
3320
3321         return rc;
3322 }
3323
3324 /*
3325  * get enclosure information
3326  * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
3327  * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
3328  * Uses id_physical_device to determine the box_index.
3329  */
3330 static void hpsa_get_enclosure_info(struct ctlr_info *h,
3331                         unsigned char *scsi3addr,
3332                         struct ReportExtendedLUNdata *rlep, int rle_index,
3333                         struct hpsa_scsi_dev_t *encl_dev)
3334 {
3335         int rc = -1;
3336         struct CommandList *c = NULL;
3337         struct ErrorInfo *ei = NULL;
3338         struct bmic_sense_storage_box_params *bssbp = NULL;
3339         struct bmic_identify_physical_device *id_phys = NULL;
3340         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
3341         u16 bmic_device_index = 0;
3342
3343         bmic_device_index = GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]);
3344
3345         if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
3346                 rc = IO_OK;
3347                 goto out;
3348         }
3349
3350         bssbp = kzalloc(sizeof(*bssbp), GFP_KERNEL);
3351         if (!bssbp)
3352                 goto out;
3353
3354         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3355         if (!id_phys)
3356                 goto out;
3357
3358         rc = hpsa_bmic_id_physical_device(h, scsi3addr, bmic_device_index,
3359                                                 id_phys, sizeof(*id_phys));
3360         if (rc) {
3361                 dev_warn(&h->pdev->dev, "%s: id_phys failed %d bdi[0x%x]\n",
3362                         __func__, encl_dev->external, bmic_device_index);
3363                 goto out;
3364         }
3365
3366         c = cmd_alloc(h);
3367
3368         rc = fill_cmd(c, BMIC_SENSE_STORAGE_BOX_PARAMS, h, bssbp,
3369                         sizeof(*bssbp), 0, RAID_CTLR_LUNID, TYPE_CMD);
3370
3371         if (rc)
3372                 goto out;
3373
3374         if (id_phys->phys_connector[1] == 'E')
3375                 c->Request.CDB[5] = id_phys->box_index;
3376         else
3377                 c->Request.CDB[5] = 0;
3378
3379         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, PCI_DMA_FROMDEVICE,
3380                                                 DEFAULT_TIMEOUT);
3381         if (rc)
3382                 goto out;
3383
3384         ei = c->err_info;
3385         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3386                 rc = -1;
3387                 goto out;
3388         }
3389
3390         encl_dev->box[id_phys->active_path_number] = bssbp->phys_box_on_port;
3391         memcpy(&encl_dev->phys_connector[id_phys->active_path_number],
3392                 bssbp->phys_connector, sizeof(bssbp->phys_connector));
3393
3394         rc = IO_OK;
3395 out:
3396         kfree(bssbp);
3397         kfree(id_phys);
3398
3399         if (c)
3400                 cmd_free(h, c);
3401
3402         if (rc != IO_OK)
3403                 hpsa_show_dev_msg(KERN_INFO, h, encl_dev,
3404                         "Error, could not get enclosure information\n");
3405 }
3406
3407 static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
3408                                                 unsigned char *scsi3addr)
3409 {
3410         struct ReportExtendedLUNdata *physdev;
3411         u32 nphysicals;
3412         u64 sa = 0;
3413         int i;
3414
3415         physdev = kzalloc(sizeof(*physdev), GFP_KERNEL);
3416         if (!physdev)
3417                 return 0;
3418
3419         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3420                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
3421                 kfree(physdev);
3422                 return 0;
3423         }
3424         nphysicals = get_unaligned_be32(physdev->LUNListLength) / 24;
3425
3426         for (i = 0; i < nphysicals; i++)
3427                 if (!memcmp(&physdev->LUN[i].lunid[0], scsi3addr, 8)) {
3428                         sa = get_unaligned_be64(&physdev->LUN[i].wwid[0]);
3429                         break;
3430                 }
3431
3432         kfree(physdev);
3433
3434         return sa;
3435 }
3436
3437 static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
3438                                         struct hpsa_scsi_dev_t *dev)
3439 {
3440         int rc;
3441         u64 sa = 0;
3442
3443         if (is_hba_lunid(scsi3addr)) {
3444                 struct bmic_sense_subsystem_info *ssi;
3445
3446                 ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
3447                 if (ssi == NULL) {
3448                         dev_warn(&h->pdev->dev,
3449                                 "%s: out of memory\n", __func__);
3450                         return;
3451                 }
3452
3453                 rc = hpsa_bmic_sense_subsystem_information(h,
3454                                         scsi3addr, 0, ssi, sizeof(*ssi));
3455                 if (rc == 0) {
3456                         sa = get_unaligned_be64(ssi->primary_world_wide_id);
3457                         h->sas_address = sa;
3458                 }
3459
3460                 kfree(ssi);
3461         } else
3462                 sa = hpsa_get_sas_address_from_report_physical(h, scsi3addr);
3463
3464         dev->sas_address = sa;
3465 }
3466
3467 /* Get a device id from inquiry page 0x83 */
3468 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3469         unsigned char scsi3addr[], u8 page)
3470 {
3471         int rc;
3472         int i;
3473         int pages;
3474         unsigned char *buf, bufsize;
3475
3476         buf = kzalloc(256, GFP_KERNEL);
3477         if (!buf)
3478                 return false;
3479
3480         /* Get the size of the page list first */
3481         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3482                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3483                                 buf, HPSA_VPD_HEADER_SZ);
3484         if (rc != 0)
3485                 goto exit_unsupported;
3486         pages = buf[3];
3487         if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
3488                 bufsize = pages + HPSA_VPD_HEADER_SZ;
3489         else
3490                 bufsize = 255;
3491
3492         /* Get the whole VPD page list */
3493         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3494                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3495                                 buf, bufsize);
3496         if (rc != 0)
3497                 goto exit_unsupported;
3498
3499         pages = buf[3];
3500         for (i = 1; i <= pages; i++)
3501                 if (buf[3 + i] == page)
3502                         goto exit_supported;
3503 exit_unsupported:
3504         kfree(buf);
3505         return false;
3506 exit_supported:
3507         kfree(buf);
3508         return true;
3509 }
3510
3511 static void hpsa_get_ioaccel_status(struct ctlr_info *h,
3512         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3513 {
3514         int rc;
3515         unsigned char *buf;
3516         u8 ioaccel_status;
3517
3518         this_device->offload_config = 0;
3519         this_device->offload_enabled = 0;
3520         this_device->offload_to_be_enabled = 0;
3521
3522         buf = kzalloc(64, GFP_KERNEL);
3523         if (!buf)
3524                 return;
3525         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
3526                 goto out;
3527         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3528                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3529         if (rc != 0)
3530                 goto out;
3531
3532 #define IOACCEL_STATUS_BYTE 4
3533 #define OFFLOAD_CONFIGURED_BIT 0x01
3534 #define OFFLOAD_ENABLED_BIT 0x02
3535         ioaccel_status = buf[IOACCEL_STATUS_BYTE];
3536         this_device->offload_config =
3537                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
3538         if (this_device->offload_config) {
3539                 this_device->offload_enabled =
3540                         !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
3541                 if (hpsa_get_raid_map(h, scsi3addr, this_device))
3542                         this_device->offload_enabled = 0;
3543         }
3544         this_device->offload_to_be_enabled = this_device->offload_enabled;
3545 out:
3546         kfree(buf);
3547         return;
3548 }
3549
3550 /* Get the device id from inquiry page 0x83 */
3551 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
3552         unsigned char *device_id, int index, int buflen)
3553 {
3554         int rc;
3555         unsigned char *buf;
3556
3557         /* Does controller have VPD for device id? */
3558         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
3559                 return 1; /* not supported */
3560
3561         buf = kzalloc(64, GFP_KERNEL);
3562         if (!buf)
3563                 return -ENOMEM;
3564
3565         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3566                                         HPSA_VPD_LV_DEVICE_ID, buf, 64);
3567         if (rc == 0) {
3568                 if (buflen > 16)
3569                         buflen = 16;
3570                 memcpy(device_id, &buf[8], buflen);
3571         }
3572
3573         kfree(buf);
3574
3575         return rc; /*0 - got id,  otherwise, didn't */
3576 }
3577
3578 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3579                 void *buf, int bufsize,
3580                 int extended_response)
3581 {
3582         int rc = IO_OK;
3583         struct CommandList *c;
3584         unsigned char scsi3addr[8];
3585         struct ErrorInfo *ei;
3586
3587         c = cmd_alloc(h);
3588
3589         /* address the controller */
3590         memset(scsi3addr, 0, sizeof(scsi3addr));
3591         if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
3592                 buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
3593                 rc = -1;
3594                 goto out;
3595         }
3596         if (extended_response)
3597                 c->Request.CDB[1] = extended_response;
3598         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
3599                                         PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
3600         if (rc)
3601                 goto out;
3602         ei = c->err_info;
3603         if (ei->CommandStatus != 0 &&
3604             ei->CommandStatus != CMD_DATA_UNDERRUN) {
3605                 hpsa_scsi_interpret_error(h, c);
3606                 rc = -1;
3607         } else {
3608                 struct ReportLUNdata *rld = buf;
3609
3610                 if (rld->extended_response_flag != extended_response) {
3611                         dev_err(&h->pdev->dev,
3612                                 "report luns requested format %u, got %u\n",
3613                                 extended_response,
3614                                 rld->extended_response_flag);
3615                         rc = -1;
3616                 }
3617         }
3618 out:
3619         cmd_free(h, c);
3620         return rc;
3621 }
3622
3623 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3624                 struct ReportExtendedLUNdata *buf, int bufsize)
3625 {
3626         return hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
3627                                                 HPSA_REPORT_PHYS_EXTENDED);
3628 }
3629
3630 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
3631                 struct ReportLUNdata *buf, int bufsize)
3632 {
3633         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
3634 }
3635
3636 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
3637         int bus, int target, int lun)
3638 {
3639         device->bus = bus;
3640         device->target = target;
3641         device->lun = lun;
3642 }
3643
3644 /* Use VPD inquiry to get details of volume status */
3645 static int hpsa_get_volume_status(struct ctlr_info *h,
3646                                         unsigned char scsi3addr[])
3647 {
3648         int rc;
3649         int status;
3650         int size;
3651         unsigned char *buf;
3652
3653         buf = kzalloc(64, GFP_KERNEL);
3654         if (!buf)
3655                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3656
3657         /* Does controller have VPD for logical volume status? */
3658         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3659                 goto exit_failed;
3660
3661         /* Get the size of the VPD return buffer */
3662         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3663                                         buf, HPSA_VPD_HEADER_SZ);
3664         if (rc != 0)
3665                 goto exit_failed;
3666         size = buf[3];
3667
3668         /* Now get the whole VPD buffer */
3669         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3670                                         buf, size + HPSA_VPD_HEADER_SZ);
3671         if (rc != 0)
3672                 goto exit_failed;
3673         status = buf[4]; /* status byte */
3674
3675         kfree(buf);
3676         return status;
3677 exit_failed:
3678         kfree(buf);
3679         return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3680 }
3681
3682 /* Determine offline status of a volume.
3683  * Return either:
3684  *  0 (not offline)
3685  *  0xff (offline for unknown reasons)
3686  *  # (integer code indicating one of several NOT READY states
3687  *     describing why a volume is to be kept offline)
3688  */
3689 static unsigned char hpsa_volume_offline(struct ctlr_info *h,
3690                                         unsigned char scsi3addr[])
3691 {
3692         struct CommandList *c;
3693         unsigned char *sense;
3694         u8 sense_key, asc, ascq;
3695         int sense_len;
3696         int rc, ldstat = 0;
3697         u16 cmd_status;
3698         u8 scsi_status;
3699 #define ASC_LUN_NOT_READY 0x04
3700 #define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
3701 #define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02
3702
3703         c = cmd_alloc(h);
3704
3705         (void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3706         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3707                                         DEFAULT_TIMEOUT);
3708         if (rc) {
3709                 cmd_free(h, c);
3710                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3711         }
3712         sense = c->err_info->SenseInfo;
3713         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
3714                 sense_len = sizeof(c->err_info->SenseInfo);
3715         else
3716                 sense_len = c->err_info->SenseLen;
3717         decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
3718         cmd_status = c->err_info->CommandStatus;
3719         scsi_status = c->err_info->ScsiStatus;
3720         cmd_free(h, c);
3721
3722         /* Determine the reason for not ready state */
3723         ldstat = hpsa_get_volume_status(h, scsi3addr);
3724
3725         /* Keep volume offline in certain cases: */
3726         switch (ldstat) {
3727         case HPSA_LV_FAILED:
3728         case HPSA_LV_UNDERGOING_ERASE:
3729         case HPSA_LV_NOT_AVAILABLE:
3730         case HPSA_LV_UNDERGOING_RPI:
3731         case HPSA_LV_PENDING_RPI:
3732         case HPSA_LV_ENCRYPTED_NO_KEY:
3733         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
3734         case HPSA_LV_UNDERGOING_ENCRYPTION:
3735         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
3736         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
3737                 return ldstat;
3738         case HPSA_VPD_LV_STATUS_UNSUPPORTED:
3739                 /* If VPD status page isn't available,
3740                  * use ASC/ASCQ to determine state
3741                  */
3742                 if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
3743                         (ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
3744                         return ldstat;
3745                 break;
3746         default:
3747                 break;
3748         }
3749         return HPSA_LV_OK;
3750 }
3751
3752 /*
3753  * Find out if a logical device supports aborts by simply trying one.
3754  * Smart Array may claim not to support aborts on logical drives, but
3755  * if a MSA2000 * is connected, the drives on that will be presented
3756  * by the Smart Array as logical drives, and aborts may be sent to
3757  * those devices successfully.  So the simplest way to find out is
3758  * to simply try an abort and see how the device responds.
3759  */
3760 static int hpsa_device_supports_aborts(struct ctlr_info *h,
3761                                         unsigned char *scsi3addr)
3762 {
3763         struct CommandList *c;
3764         struct ErrorInfo *ei;
3765         int rc = 0;
3766
3767         u64 tag = (u64) -1; /* bogus tag */
3768
3769         /* Assume that physical devices support aborts */
3770         if (!is_logical_dev_addr_mode(scsi3addr))
3771                 return 1;
3772
3773         c = cmd_alloc(h);
3774
3775         (void) fill_cmd(c, HPSA_ABORT_MSG, h, &tag, 0, 0, scsi3addr, TYPE_MSG);
3776         (void) hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3777                                         DEFAULT_TIMEOUT);
3778         /* no unmap needed here because no data xfer. */
3779         ei = c->err_info;
3780         switch (ei->CommandStatus) {
3781         case CMD_INVALID:
3782                 rc = 0;
3783                 break;
3784         case CMD_UNABORTABLE:
3785         case CMD_ABORT_FAILED:
3786                 rc = 1;
3787                 break;
3788         case CMD_TMF_STATUS:
3789                 rc = hpsa_evaluate_tmf_status(h, c);
3790                 break;
3791         default:
3792                 rc = 0;
3793                 break;
3794         }
3795         cmd_free(h, c);
3796         return rc;
3797 }
3798
3799 static int hpsa_update_device_info(struct ctlr_info *h,
3800         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
3801         unsigned char *is_OBDR_device)
3802 {
3803
3804 #define OBDR_SIG_OFFSET 43
3805 #define OBDR_TAPE_SIG "$DR-10"
3806 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
3807 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
3808
3809         unsigned char *inq_buff;
3810         unsigned char *obdr_sig;
3811         int rc = 0;
3812
3813         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3814         if (!inq_buff) {
3815                 rc = -ENOMEM;
3816                 goto bail_out;
3817         }
3818
3819         /* Do an inquiry to the device to see what it is. */
3820         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
3821                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
3822                 dev_err(&h->pdev->dev,
3823                         "%s: inquiry failed, device will be skipped.\n",
3824                         __func__);
3825                 rc = HPSA_INQUIRY_FAILED;
3826                 goto bail_out;
3827         }
3828
3829         scsi_sanitize_inquiry_string(&inq_buff[8], 8);
3830         scsi_sanitize_inquiry_string(&inq_buff[16], 16);
3831
3832         this_device->devtype = (inq_buff[0] & 0x1f);
3833         memcpy(this_device->scsi3addr, scsi3addr, 8);
3834         memcpy(this_device->vendor, &inq_buff[8],
3835                 sizeof(this_device->vendor));
3836         memcpy(this_device->model, &inq_buff[16],
3837                 sizeof(this_device->model));
3838         this_device->rev = inq_buff[2];
3839         memset(this_device->device_id, 0,
3840                 sizeof(this_device->device_id));
3841         if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3842                 sizeof(this_device->device_id)))
3843                 dev_err(&h->pdev->dev,
3844                         "hpsa%d: %s: can't get device id for host %d:C0:T%d:L%d\t%s\t%.16s\n",
3845                         h->ctlr, __func__,
3846                         h->scsi_host->host_no,
3847                         this_device->target, this_device->lun,
3848                         scsi_device_type(this_device->devtype),
3849                         this_device->model);
3850
3851         if ((this_device->devtype == TYPE_DISK ||
3852                 this_device->devtype == TYPE_ZBC) &&
3853                 is_logical_dev_addr_mode(scsi3addr)) {
3854                 unsigned char volume_offline;
3855
3856                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
3857                 if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
3858                         hpsa_get_ioaccel_status(h, scsi3addr, this_device);
3859                 volume_offline = hpsa_volume_offline(h, scsi3addr);
3860                 this_device->volume_offline = volume_offline;
3861                 if (volume_offline == HPSA_LV_FAILED) {
3862                         rc = HPSA_LV_FAILED;
3863                         dev_err(&h->pdev->dev,
3864                                 "%s: LV failed, device will be skipped.\n",
3865                                 __func__);
3866                         goto bail_out;
3867                 }
3868         } else {
3869                 this_device->raid_level = RAID_UNKNOWN;
3870                 this_device->offload_config = 0;
3871                 this_device->offload_enabled = 0;
3872                 this_device->offload_to_be_enabled = 0;
3873                 this_device->hba_ioaccel_enabled = 0;
3874                 this_device->volume_offline = 0;
3875                 this_device->queue_depth = h->nr_cmds;
3876         }
3877
3878         if (is_OBDR_device) {
3879                 /* See if this is a One-Button-Disaster-Recovery device
3880                  * by looking for "$DR-10" at offset 43 in inquiry data.
3881                  */
3882                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
3883                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
3884                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
3885                                                 OBDR_SIG_LEN) == 0);
3886         }
3887         kfree(inq_buff);
3888         return 0;
3889
3890 bail_out:
3891         kfree(inq_buff);
3892         return rc;
3893 }
3894
3895 static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
3896                         struct hpsa_scsi_dev_t *dev, u8 *scsi3addr)
3897 {
3898         unsigned long flags;
3899         int rc, entry;
3900         /*
3901          * See if this device supports aborts.  If we already know
3902          * the device, we already know if it supports aborts, otherwise
3903          * we have to find out if it supports aborts by trying one.
3904          */
3905         spin_lock_irqsave(&h->devlock, flags);
3906         rc = hpsa_scsi_find_entry(dev, h->dev, h->ndevices, &entry);
3907         if ((rc == DEVICE_SAME || rc == DEVICE_UPDATED) &&
3908                 entry >= 0 && entry < h->ndevices) {
3909                 dev->supports_aborts = h->dev[entry]->supports_aborts;
3910                 spin_unlock_irqrestore(&h->devlock, flags);
3911         } else {
3912                 spin_unlock_irqrestore(&h->devlock, flags);
3913                 dev->supports_aborts =
3914                                 hpsa_device_supports_aborts(h, scsi3addr);
3915                 if (dev->supports_aborts < 0)
3916                         dev->supports_aborts = 0;
3917         }
3918 }
3919
3920 /*
3921  * Helper function to assign bus, target, lun mapping of devices.
3922  * Logical drive target and lun are assigned at this time, but
3923  * physical device lun and target assignment are deferred (assigned
3924  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
3925 */
3926 static void figure_bus_target_lun(struct ctlr_info *h,
3927         u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
3928 {
3929         u32 lunid = get_unaligned_le32(lunaddrbytes);
3930
3931         if (!is_logical_dev_addr_mode(lunaddrbytes)) {
3932                 /* physical device, target and lun filled in later */
3933                 if (is_hba_lunid(lunaddrbytes)) {
3934                         int bus = HPSA_HBA_BUS;
3935
3936                         if (!device->rev)
3937                                 bus = HPSA_LEGACY_HBA_BUS;
3938                         hpsa_set_bus_target_lun(device,
3939                                         bus, 0, lunid & 0x3fff);
3940                 } else
3941                         /* defer target, lun assignment for physical devices */
3942                         hpsa_set_bus_target_lun(device,
3943                                         HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
3944                 return;
3945         }
3946         /* It's a logical device */
3947         if (device->external) {
3948                 hpsa_set_bus_target_lun(device,
3949                         HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
3950                         lunid & 0x00ff);
3951                 return;
3952         }
3953         hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
3954                                 0, lunid & 0x3fff);
3955 }
3956
3957
3958 /*
3959  * Get address of physical disk used for an ioaccel2 mode command:
3960  *      1. Extract ioaccel2 handle from the command.
3961  *      2. Find a matching ioaccel2 handle from list of physical disks.
3962  *      3. Return:
3963  *              1 and set scsi3addr to address of matching physical
3964  *              0 if no matching physical disk was found.
3965  */
3966 static int hpsa_get_pdisk_of_ioaccel2(struct ctlr_info *h,
3967         struct CommandList *ioaccel2_cmd_to_abort, unsigned char *scsi3addr)
3968 {
3969         struct io_accel2_cmd *c2 =
3970                         &h->ioaccel2_cmd_pool[ioaccel2_cmd_to_abort->cmdindex];
3971         unsigned long flags;
3972         int i;
3973
3974         spin_lock_irqsave(&h->devlock, flags);
3975         for (i = 0; i < h->ndevices; i++)
3976                 if (h->dev[i]->ioaccel_handle == le32_to_cpu(c2->scsi_nexus)) {
3977                         memcpy(scsi3addr, h->dev[i]->scsi3addr,
3978                                 sizeof(h->dev[i]->scsi3addr));
3979                         spin_unlock_irqrestore(&h->devlock, flags);
3980                         return 1;
3981                 }
3982         spin_unlock_irqrestore(&h->devlock, flags);
3983         return 0;
3984 }
3985
3986 static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
3987         int i, int nphysicals, int nlocal_logicals)
3988 {
3989         /* In report logicals, local logicals are listed first,
3990         * then any externals.
3991         */
3992         int logicals_start = nphysicals + (raid_ctlr_position == 0);
3993
3994         if (i == raid_ctlr_position)
3995                 return 0;
3996
3997         if (i < logicals_start)
3998                 return 0;
3999
4000         /* i is in logicals range, but still within local logicals */
4001         if ((i - nphysicals - (raid_ctlr_position == 0)) < nlocal_logicals)
4002                 return 0;
4003
4004         return 1; /* it's an external lun */
4005 }
4006
4007 /*
4008  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
4009  * logdev.  The number of luns in physdev and logdev are returned in
4010  * *nphysicals and *nlogicals, respectively.
4011  * Returns 0 on success, -1 otherwise.
4012  */
4013 static int hpsa_gather_lun_info(struct ctlr_info *h,
4014         struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4015         struct ReportLUNdata *logdev, u32 *nlogicals)
4016 {
4017         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4018                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
4019                 return -1;
4020         }
4021         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4022         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4023                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
4024                         HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4025                 *nphysicals = HPSA_MAX_PHYS_LUN;
4026         }
4027         if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4028                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
4029                 return -1;
4030         }
4031         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4032         /* Reject Logicals in excess of our max capability. */
4033         if (*nlogicals > HPSA_MAX_LUN) {
4034                 dev_warn(&h->pdev->dev,
4035                         "maximum logical LUNs (%d) exceeded.  "
4036                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
4037                         *nlogicals - HPSA_MAX_LUN);
4038                         *nlogicals = HPSA_MAX_LUN;
4039         }
4040         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
4041                 dev_warn(&h->pdev->dev,
4042                         "maximum logical + physical LUNs (%d) exceeded. "
4043                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
4044                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
4045                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
4046         }
4047         return 0;
4048 }
4049
4050 static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
4051         int i, int nphysicals, int nlogicals,
4052         struct ReportExtendedLUNdata *physdev_list,
4053         struct ReportLUNdata *logdev_list)
4054 {
4055         /* Helper function, figure out where the LUN ID info is coming from
4056          * given index i, lists of physical and logical devices, where in
4057          * the list the raid controller is supposed to appear (first or last)
4058          */
4059
4060         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4061         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
4062
4063         if (i == raid_ctlr_position)
4064                 return RAID_CTLR_LUNID;
4065
4066         if (i < logicals_start)
4067                 return &physdev_list->LUN[i -
4068                                 (raid_ctlr_position == 0)].lunid[0];
4069
4070         if (i < last_device)
4071                 return &logdev_list->LUN[i - nphysicals -
4072                         (raid_ctlr_position == 0)][0];
4073         BUG();
4074         return NULL;
4075 }
4076
4077 /* get physical drive ioaccel handle and queue depth */
4078 static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
4079                 struct hpsa_scsi_dev_t *dev,
4080                 struct ReportExtendedLUNdata *rlep, int rle_index,
4081                 struct bmic_identify_physical_device *id_phys)
4082 {
4083         int rc;
4084         struct ext_report_lun_entry *rle;
4085
4086         /*
4087          * external targets don't support BMIC
4088          */
4089         if (dev->external) {
4090                 dev->queue_depth = 7;
4091                 return;
4092         }
4093
4094         rle = &rlep->LUN[rle_index];
4095
4096         dev->ioaccel_handle = rle->ioaccel_handle;
4097         if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4098                 dev->hba_ioaccel_enabled = 1;
4099         memset(id_phys, 0, sizeof(*id_phys));
4100         rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
4101                         GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4102                         sizeof(*id_phys));
4103         if (!rc)
4104                 /* Reserve space for FW operations */
4105 #define DRIVE_CMDS_RESERVED_FOR_FW 2
4106 #define DRIVE_QUEUE_DEPTH 7
4107                 dev->queue_depth =
4108                         le16_to_cpu(id_phys->current_queue_depth_limit) -
4109                                 DRIVE_CMDS_RESERVED_FOR_FW;
4110         else
4111                 dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
4112 }
4113
4114 static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4115         struct ReportExtendedLUNdata *rlep, int rle_index,
4116         struct bmic_identify_physical_device *id_phys)
4117 {
4118         struct ext_report_lun_entry *rle = &rlep->LUN[rle_index];
4119
4120         if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4121                 this_device->hba_ioaccel_enabled = 1;
4122
4123         memcpy(&this_device->active_path_index,
4124                 &id_phys->active_path_number,
4125                 sizeof(this_device->active_path_index));
4126         memcpy(&this_device->path_map,
4127                 &id_phys->redundant_path_present_map,
4128                 sizeof(this_device->path_map));
4129         memcpy(&this_device->box,
4130                 &id_phys->alternate_paths_phys_box_on_port,
4131                 sizeof(this_device->box));
4132         memcpy(&this_device->phys_connector,
4133                 &id_phys->alternate_paths_phys_connector,
4134                 sizeof(this_device->phys_connector));
4135         memcpy(&this_device->bay,
4136                 &id_phys->phys_bay_in_box,
4137                 sizeof(this_device->bay));
4138 }
4139
4140 /* get number of local logical disks. */
4141 static int hpsa_set_local_logical_count(struct ctlr_info *h,
4142         struct bmic_identify_controller *id_ctlr,
4143         u32 *nlocals)
4144 {
4145         int rc;
4146
4147         if (!id_ctlr) {
4148                 dev_warn(&h->pdev->dev, "%s: id_ctlr buffer is NULL.\n",
4149                         __func__);
4150                 return -ENOMEM;
4151         }
4152         memset(id_ctlr, 0, sizeof(*id_ctlr));
4153         rc = hpsa_bmic_id_controller(h, id_ctlr, sizeof(*id_ctlr));
4154         if (!rc)
4155                 if (id_ctlr->configured_logical_drive_count < 256)
4156                         *nlocals = id_ctlr->configured_logical_drive_count;
4157                 else
4158                         *nlocals = le16_to_cpu(
4159                                         id_ctlr->extended_logical_unit_count);
4160         else
4161                 *nlocals = -1;
4162         return rc;
4163 }
4164
4165 static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
4166 {
4167         struct bmic_identify_physical_device *id_phys;
4168         bool is_spare = false;
4169         int rc;
4170
4171         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4172         if (!id_phys)
4173                 return false;
4174
4175         rc = hpsa_bmic_id_physical_device(h,
4176                                         lunaddrbytes,
4177                                         GET_BMIC_DRIVE_NUMBER(lunaddrbytes),
4178                                         id_phys, sizeof(*id_phys));
4179         if (rc == 0)
4180                 is_spare = (id_phys->more_flags >> 6) & 0x01;
4181
4182         kfree(id_phys);
4183         return is_spare;
4184 }
4185
4186 #define RPL_DEV_FLAG_NON_DISK                           0x1
4187 #define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED  0x2
4188 #define RPL_DEV_FLAG_UNCONFIG_DISK                      0x4
4189
4190 #define BMIC_DEVICE_TYPE_ENCLOSURE  6
4191
4192 static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes,
4193                                 struct ext_report_lun_entry *rle)
4194 {
4195         u8 device_flags;
4196         u8 device_type;
4197
4198         if (!MASKED_DEVICE(lunaddrbytes))
4199                 return false;
4200
4201         device_flags = rle->device_flags;
4202         device_type = rle->device_type;
4203
4204         if (device_flags & RPL_DEV_FLAG_NON_DISK) {
4205                 if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE)
4206                         return false;
4207                 return true;
4208         }
4209
4210         if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED))
4211                 return false;
4212
4213         if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
4214                 return false;
4215
4216         /*
4217          * Spares may be spun down, we do not want to
4218          * do an Inquiry to a RAID set spare drive as
4219          * that would have them spun up, that is a
4220          * performance hit because I/O to the RAID device
4221          * stops while the spin up occurs which can take
4222          * over 50 seconds.
4223          */
4224         if (hpsa_is_disk_spare(h, lunaddrbytes))
4225                 return true;
4226
4227         return false;
4228 }
4229
4230 static void hpsa_update_scsi_devices(struct ctlr_info *h)
4231 {
4232         /* the idea here is we could get notified
4233          * that some devices have changed, so we do a report
4234          * physical luns and report logical luns cmd, and adjust
4235          * our list of devices accordingly.
4236          *
4237          * The scsi3addr's of devices won't change so long as the
4238          * adapter is not reset.  That means we can rescan and
4239          * tell which devices we already know about, vs. new
4240          * devices, vs.  disappearing devices.
4241          */
4242         struct ReportExtendedLUNdata *physdev_list = NULL;
4243         struct ReportLUNdata *logdev_list = NULL;
4244         struct bmic_identify_physical_device *id_phys = NULL;
4245         struct bmic_identify_controller *id_ctlr = NULL;
4246         u32 nphysicals = 0;
4247         u32 nlogicals = 0;
4248         u32 nlocal_logicals = 0;
4249         u32 ndev_allocated = 0;
4250         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
4251         int ncurrent = 0;
4252         int i, n_ext_target_devs, ndevs_to_allocate;
4253         int raid_ctlr_position;
4254         bool physical_device;
4255         DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4256
4257         currentsd = kzalloc(sizeof(*currentsd) * HPSA_MAX_DEVICES, GFP_KERNEL);
4258         physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
4259         logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4260         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4261         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4262         id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4263
4264         if (!currentsd || !physdev_list || !logdev_list ||
4265                 !tmpdevice || !id_phys || !id_ctlr) {
4266                 dev_err(&h->pdev->dev, "out of memory\n");
4267                 goto out;
4268         }
4269         memset(lunzerobits, 0, sizeof(lunzerobits));
4270
4271         h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */
4272
4273         if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
4274                         logdev_list, &nlogicals)) {
4275                 h->drv_req_rescan = 1;
4276                 goto out;
4277         }
4278
4279         /* Set number of local logicals (non PTRAID) */
4280         if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
4281                 dev_warn(&h->pdev->dev,
4282                         "%s: Can't determine number of local logical devices.\n",
4283                         __func__);
4284         }
4285
4286         /* We might see up to the maximum number of logical and physical disks
4287          * plus external target devices, and a device for the local RAID
4288          * controller.
4289          */
4290         ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4291
4292         /* Allocate the per device structures */
4293         for (i = 0; i < ndevs_to_allocate; i++) {
4294                 if (i >= HPSA_MAX_DEVICES) {
4295                         dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
4296                                 "  %d devices ignored.\n", HPSA_MAX_DEVICES,
4297                                 ndevs_to_allocate - HPSA_MAX_DEVICES);
4298                         break;
4299                 }
4300
4301                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
4302                 if (!currentsd[i]) {
4303                         dev_warn(&h->pdev->dev, "out of memory at %s:%d\n",
4304                                 __FILE__, __LINE__);
4305                         h->drv_req_rescan = 1;
4306                         goto out;
4307                 }
4308                 ndev_allocated++;
4309         }
4310
4311         if (is_scsi_rev_5(h))
4312                 raid_ctlr_position = 0;
4313         else
4314                 raid_ctlr_position = nphysicals + nlogicals;
4315
4316         /* adjust our table of devices */
4317         n_ext_target_devs = 0;
4318         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4319                 u8 *lunaddrbytes, is_OBDR = 0;
4320                 int rc = 0;
4321                 int phys_dev_index = i - (raid_ctlr_position == 0);
4322                 bool skip_device = false;
4323
4324                 physical_device = i < nphysicals + (raid_ctlr_position == 0);
4325
4326                 /* Figure out where the LUN ID info is coming from */
4327                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
4328                         i, nphysicals, nlogicals, physdev_list, logdev_list);
4329
4330                 /* Determine if this is a lun from an external target array */
4331                 tmpdevice->external =
4332                         figure_external_status(h, raid_ctlr_position, i,
4333                                                 nphysicals, nlocal_logicals);
4334
4335                 /*
4336                  * Skip over some devices such as a spare.
4337                  */
4338                 if (!tmpdevice->external && physical_device) {
4339                         skip_device = hpsa_skip_device(h, lunaddrbytes,
4340                                         &physdev_list->LUN[phys_dev_index]);
4341                         if (skip_device)
4342                                 continue;
4343                 }
4344
4345                 /* Get device type, vendor, model, device id */
4346                 rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
4347                                                         &is_OBDR);
4348                 if (rc == -ENOMEM) {
4349                         dev_warn(&h->pdev->dev,
4350                                 "Out of memory, rescan deferred.\n");
4351                         h->drv_req_rescan = 1;
4352                         goto out;
4353                 }
4354                 if (rc) {
4355                         h->drv_req_rescan = 1;
4356                         continue;
4357                 }
4358
4359                 figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
4360                 hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
4361                 this_device = currentsd[ncurrent];
4362
4363                 /* Turn on discovery_polling if there are ext target devices.
4364                  * Event-based change notification is unreliable for those.
4365                  */
4366                 if (!h->discovery_polling) {
4367                         if (tmpdevice->external) {
4368                                 h->discovery_polling = 1;
4369                                 dev_info(&h->pdev->dev,
4370                                         "External target, activate discovery polling.\n");
4371                         }
4372                 }
4373
4374
4375                 *this_device = *tmpdevice;
4376                 this_device->physical_device = physical_device;
4377
4378                 /*
4379                  * Expose all devices except for physical devices that
4380                  * are masked.
4381                  */
4382                 if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4383                         this_device->expose_device = 0;
4384                 else
4385                         this_device->expose_device = 1;
4386
4387
4388                 /*
4389                  * Get the SAS address for physical devices that are exposed.
4390                  */
4391                 if (this_device->physical_device && this_device->expose_device)
4392                         hpsa_get_sas_address(h, lunaddrbytes, this_device);
4393
4394                 switch (this_device->devtype) {
4395                 case TYPE_ROM:
4396                         /* We don't *really* support actual CD-ROM devices,
4397                          * just "One Button Disaster Recovery" tape drive
4398                          * which temporarily pretends to be a CD-ROM drive.
4399                          * So we check that the device is really an OBDR tape
4400                          * device by checking for "$DR-10" in bytes 43-48 of
4401                          * the inquiry data.
4402                          */
4403                         if (is_OBDR)
4404                                 ncurrent++;
4405                         break;
4406                 case TYPE_DISK:
4407                 case TYPE_ZBC:
4408                         if (this_device->physical_device) {
4409                                 /* The disk is in HBA mode. */
4410                                 /* Never use RAID mapper in HBA mode. */
4411                                 this_device->offload_enabled = 0;
4412                                 hpsa_get_ioaccel_drive_info(h, this_device,
4413                                         physdev_list, phys_dev_index, id_phys);
4414                                 hpsa_get_path_info(this_device,
4415                                         physdev_list, phys_dev_index, id_phys);
4416                         }
4417                         ncurrent++;
4418                         break;
4419                 case TYPE_TAPE:
4420                 case TYPE_MEDIUM_CHANGER:
4421                         ncurrent++;
4422                         break;
4423                 case TYPE_ENCLOSURE:
4424                         if (!this_device->external)
4425                                 hpsa_get_enclosure_info(h, lunaddrbytes,
4426                                                 physdev_list, phys_dev_index,
4427                                                 this_device);
4428                         ncurrent++;
4429                         break;
4430                 case TYPE_RAID:
4431                         /* Only present the Smartarray HBA as a RAID controller.
4432                          * If it's a RAID controller other than the HBA itself
4433                          * (an external RAID controller, MSA500 or similar)
4434                          * don't present it.
4435                          */
4436                         if (!is_hba_lunid(lunaddrbytes))
4437                                 break;
4438                         ncurrent++;
4439                         break;
4440                 default:
4441                         break;
4442                 }
4443                 if (ncurrent >= HPSA_MAX_DEVICES)
4444                         break;
4445         }
4446
4447         if (h->sas_host == NULL) {
4448                 int rc = 0;
4449
4450                 rc = hpsa_add_sas_host(h);
4451                 if (rc) {
4452                         dev_warn(&h->pdev->dev,
4453                                 "Could not add sas host %d\n", rc);
4454                         goto out;
4455                 }
4456         }
4457
4458         adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4459 out:
4460         kfree(tmpdevice);
4461         for (i = 0; i < ndev_allocated; i++)
4462                 kfree(currentsd[i]);
4463         kfree(currentsd);
4464         kfree(physdev_list);
4465         kfree(logdev_list);
4466         kfree(id_ctlr);
4467         kfree(id_phys);
4468 }
4469
4470 static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
4471                                    struct scatterlist *sg)
4472 {
4473         u64 addr64 = (u64) sg_dma_address(sg);
4474         unsigned int len = sg_dma_len(sg);
4475
4476         desc->Addr = cpu_to_le64(addr64);
4477         desc->Len = cpu_to_le32(len);
4478         desc->Ext = 0;
4479 }
4480
4481 /*
4482  * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4483  * dma mapping  and fills in the scatter gather entries of the
4484  * hpsa command, cp.
4485  */
4486 static int hpsa_scatter_gather(struct ctlr_info *h,
4487                 struct CommandList *cp,
4488                 struct scsi_cmnd *cmd)
4489 {
4490         struct scatterlist *sg;
4491         int use_sg, i, sg_limit, chained, last_sg;
4492         struct SGDescriptor *curr_sg;
4493
4494         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4495
4496         use_sg = scsi_dma_map(cmd);
4497         if (use_sg < 0)
4498                 return use_sg;
4499
4500         if (!use_sg)
4501                 goto sglist_finished;
4502
4503         /*
4504          * If the number of entries is greater than the max for a single list,
4505          * then we have a chained list; we will set up all but one entry in the
4506          * first list (the last entry is saved for link information);
4507          * otherwise, we don't have a chained list and we'll set up at each of
4508          * the entries in the one list.
4509          */
4510         curr_sg = cp->SG;
4511         chained = use_sg > h->max_cmd_sg_entries;
4512         sg_limit = chained ? h->max_cmd_sg_entries - 1 : use_sg;
4513         last_sg = scsi_sg_count(cmd) - 1;
4514         scsi_for_each_sg(cmd, sg, sg_limit, i) {
4515                 hpsa_set_sg_descriptor(curr_sg, sg);
4516                 curr_sg++;
4517         }
4518
4519         if (chained) {
4520                 /*
4521                  * Continue with the chained list.  Set curr_sg to the chained
4522                  * list.  Modify the limit to the total count less the entries
4523                  * we've already set up.  Resume the scan at the list entry
4524                  * where the previous loop left off.
4525                  */
4526                 curr_sg = h->cmd_sg_list[cp->cmdindex];
4527                 sg_limit = use_sg - sg_limit;
4528                 for_each_sg(sg, sg, sg_limit, i) {
4529                         hpsa_set_sg_descriptor(curr_sg, sg);
4530                         curr_sg++;
4531                 }
4532         }
4533
4534         /* Back the pointer up to the last entry and mark it as "last". */
4535         (curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4536
4537         if (use_sg + chained > h->maxSG)
4538                 h->maxSG = use_sg + chained;
4539
4540         if (chained) {
4541                 cp->Header.SGList = h->max_cmd_sg_entries;
4542                 cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4543                 if (hpsa_map_sg_chain_block(h, cp)) {
4544                         scsi_dma_unmap(cmd);
4545                         return -1;
4546                 }
4547                 return 0;
4548         }
4549
4550 sglist_finished:
4551
4552         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4553         cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4554         return 0;
4555 }
4556
4557 #define IO_ACCEL_INELIGIBLE (1)
4558 static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
4559 {
4560         int is_write = 0;
4561         u32 block;
4562         u32 block_cnt;
4563
4564         /* Perform some CDB fixups if needed using 10 byte reads/writes only */
4565         switch (cdb[0]) {
4566         case WRITE_6:
4567         case WRITE_12:
4568                 is_write = 1;
4569         case READ_6:
4570         case READ_12:
4571                 if (*cdb_len == 6) {
4572                         block = (((cdb[1] & 0x1F) << 16) |
4573                                 (cdb[2] << 8) |
4574                                 cdb[3]);
4575                         block_cnt = cdb[4];
4576                         if (block_cnt == 0)
4577                                 block_cnt = 256;
4578                 } else {
4579                         BUG_ON(*cdb_len != 12);
4580                         block = get_unaligned_be32(&cdb[2]);
4581                         block_cnt = get_unaligned_be32(&cdb[6]);
4582                 }
4583                 if (block_cnt > 0xffff)
4584                         return IO_ACCEL_INELIGIBLE;
4585
4586                 cdb[0] = is_write ? WRITE_10 : READ_10;
4587                 cdb[1] = 0;
4588                 cdb[2] = (u8) (block >> 24);
4589                 cdb[3] = (u8) (block >> 16);
4590                 cdb[4] = (u8) (block >> 8);
4591                 cdb[5] = (u8) (block);
4592                 cdb[6] = 0;
4593                 cdb[7] = (u8) (block_cnt >> 8);
4594                 cdb[8] = (u8) (block_cnt);
4595                 cdb[9] = 0;
4596                 *cdb_len = 10;
4597                 break;
4598         }
4599         return 0;
4600 }
4601
4602 static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4603         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4604         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4605 {
4606         struct scsi_cmnd *cmd = c->scsi_cmd;
4607         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
4608         unsigned int len;
4609         unsigned int total_len = 0;
4610         struct scatterlist *sg;
4611         u64 addr64;
4612         int use_sg, i;
4613         struct SGDescriptor *curr_sg;
4614         u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;
4615
4616         /* TODO: implement chaining support */
4617         if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
4618                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4619                 return IO_ACCEL_INELIGIBLE;
4620         }
4621
4622         BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);
4623
4624         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4625                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4626                 return IO_ACCEL_INELIGIBLE;
4627         }
4628
4629         c->cmd_type = CMD_IOACCEL1;
4630
4631         /* Adjust the DMA address to point to the accelerated command buffer */
4632         c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
4633                                 (c->cmdindex * sizeof(*cp));
4634         BUG_ON(c->busaddr & 0x0000007F);
4635
4636         use_sg = scsi_dma_map(cmd);
4637         if (use_sg < 0) {
4638                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4639                 return use_sg;
4640         }
4641
4642         if (use_sg) {
4643                 curr_sg = cp->SG;
4644                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4645                         addr64 = (u64) sg_dma_address(sg);
4646                         len  = sg_dma_len(sg);
4647                         total_len += len;
4648                         curr_sg->Addr = cpu_to_le64(addr64);
4649                         curr_sg->Len = cpu_to_le32(len);
4650                         curr_sg->Ext = cpu_to_le32(0);
4651                         curr_sg++;
4652                 }
4653                 (--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4654
4655                 switch (cmd->sc_data_direction) {
4656                 case DMA_TO_DEVICE:
4657                         control |= IOACCEL1_CONTROL_DATA_OUT;
4658                         break;
4659                 case DMA_FROM_DEVICE:
4660                         control |= IOACCEL1_CONTROL_DATA_IN;
4661                         break;
4662                 case DMA_NONE:
4663                         control |= IOACCEL1_CONTROL_NODATAXFER;
4664                         break;
4665                 default:
4666                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4667                         cmd->sc_data_direction);
4668                         BUG();
4669                         break;
4670                 }
4671         } else {
4672                 control |= IOACCEL1_CONTROL_NODATAXFER;
4673         }
4674
4675         c->Header.SGList = use_sg;
4676         /* Fill out the command structure to submit */
4677         cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
4678         cp->transfer_len = cpu_to_le32(total_len);
4679         cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
4680                         (cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
4681         cp->control = cpu_to_le32(control);
4682         memcpy(cp->CDB, cdb, cdb_len);
4683         memcpy(cp->CISS_LUN, scsi3addr, 8);
4684         /* Tag was already set at init time. */
4685         enqueue_cmd_and_start_io(h, c);
4686         return 0;
4687 }
4688
4689 /*
4690  * Queue a command directly to a device behind the controller using the
4691  * I/O accelerator path.
4692  */
4693 static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
4694         struct CommandList *c)
4695 {
4696         struct scsi_cmnd *cmd = c->scsi_cmd;
4697         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4698
4699         if (!dev)
4700                 return -1;
4701
4702         c->phys_disk = dev;
4703
4704         return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4705                 cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4706 }
4707
4708 /*
4709  * Set encryption parameters for the ioaccel2 request
4710  */
4711 static void set_encrypt_ioaccel2(struct ctlr_info *h,
4712         struct CommandList *c, struct io_accel2_cmd *cp)
4713 {
4714         struct scsi_cmnd *cmd = c->scsi_cmd;
4715         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4716         struct raid_map_data *map = &dev->raid_map;
4717         u64 first_block;
4718
4719         /* Are we doing encryption on this device */
4720         if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4721                 return;
4722         /* Set the data encryption key index. */
4723         cp->dekindex = map->dekindex;
4724
4725         /* Set the encryption enable flag, encoded into direction field. */
4726         cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;
4727
4728         /* Set encryption tweak values based on logical block address
4729          * If block size is 512, tweak value is LBA.
4730          * For other block sizes, tweak is (LBA * block size)/ 512)
4731          */
4732         switch (cmd->cmnd[0]) {
4733         /* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
4734         case READ_6:
4735         case WRITE_6:
4736                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
4737                                 (cmd->cmnd[2] << 8) |
4738                                 cmd->cmnd[3]);
4739                 break;
4740         case WRITE_10:
4741         case READ_10:
4742         /* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
4743         case WRITE_12:
4744         case READ_12:
4745                 first_block = get_unaligned_be32(&cmd->cmnd[2]);
4746                 break;
4747         case WRITE_16:
4748         case READ_16:
4749                 first_block = get_unaligned_be64(&cmd->cmnd[2]);
4750                 break;
4751         default:
4752                 dev_err(&h->pdev->dev,
4753                         "ERROR: %s: size (0x%x) not supported for encryption\n",
4754                         __func__, cmd->cmnd[0]);
4755                 BUG();
4756                 break;
4757         }
4758
4759         if (le32_to_cpu(map->volume_blk_size) != 512)
4760                 first_block = first_block *
4761                                 le32_to_cpu(map->volume_blk_size)/512;
4762
4763         cp->tweak_lower = cpu_to_le32(first_block);
4764         cp->tweak_upper = cpu_to_le32(first_block >> 32);
4765 }
4766
4767 static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
4768         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4769         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4770 {
4771         struct scsi_cmnd *cmd = c->scsi_cmd;
4772         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
4773         struct ioaccel2_sg_element *curr_sg;
4774         int use_sg, i;
4775         struct scatterlist *sg;
4776         u64 addr64;
4777         u32 len;
4778         u32 total_len = 0;
4779
4780         if (!cmd->device)
4781                 return -1;
4782
4783         if (!cmd->device->hostdata)
4784                 return -1;
4785
4786         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4787
4788         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4789                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4790                 return IO_ACCEL_INELIGIBLE;
4791         }
4792
4793         c->cmd_type = CMD_IOACCEL2;
4794         /* Adjust the DMA address to point to the accelerated command buffer */
4795         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
4796                                 (c->cmdindex * sizeof(*cp));
4797         BUG_ON(c->busaddr & 0x0000007F);
4798
4799         memset(cp, 0, sizeof(*cp));
4800         cp->IU_type = IOACCEL2_IU_TYPE;
4801
4802         use_sg = scsi_dma_map(cmd);
4803         if (use_sg < 0) {
4804                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4805                 return use_sg;
4806         }
4807
4808         if (use_sg) {
4809                 curr_sg = cp->sg;
4810                 if (use_sg > h->ioaccel_maxsg) {
4811                         addr64 = le64_to_cpu(
4812                                 h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
4813                         curr_sg->address = cpu_to_le64(addr64);
4814                         curr_sg->length = 0;
4815                         curr_sg->reserved[0] = 0;
4816                         curr_sg->reserved[1] = 0;
4817                         curr_sg->reserved[2] = 0;
4818                         curr_sg->chain_indicator = 0x80;
4819
4820                         curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
4821                 }
4822                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4823                         addr64 = (u64) sg_dma_address(sg);
4824                         len  = sg_dma_len(sg);
4825                         total_len += len;
4826                         curr_sg->address = cpu_to_le64(addr64);
4827                         curr_sg->length = cpu_to_le32(len);
4828                         curr_sg->reserved[0] = 0;
4829                         curr_sg->reserved[1] = 0;
4830                         curr_sg->reserved[2] = 0;
4831                         curr_sg->chain_indicator = 0;
4832                         curr_sg++;
4833                 }
4834
4835                 switch (cmd->sc_data_direction) {
4836                 case DMA_TO_DEVICE:
4837                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4838                         cp->direction |= IOACCEL2_DIR_DATA_OUT;
4839                         break;
4840                 case DMA_FROM_DEVICE:
4841                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4842                         cp->direction |= IOACCEL2_DIR_DATA_IN;
4843                         break;
4844                 case DMA_NONE:
4845                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4846                         cp->direction |= IOACCEL2_DIR_NO_DATA;
4847                         break;
4848                 default:
4849                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4850                                 cmd->sc_data_direction);
4851                         BUG();
4852                         break;
4853                 }
4854         } else {
4855                 cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4856                 cp->direction |= IOACCEL2_DIR_NO_DATA;
4857         }
4858
4859         /* Set encryption parameters, if necessary */
4860         set_encrypt_ioaccel2(h, c, cp);
4861
4862         cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
4863         cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
4864         memcpy(cp->cdb, cdb, sizeof(cp->cdb));
4865
4866         cp->data_len = cpu_to_le32(total_len);
4867         cp->err_ptr = cpu_to_le64(c->busaddr +
4868                         offsetof(struct io_accel2_cmd, error_data));
4869         cp->err_len = cpu_to_le32(sizeof(cp->error_data));
4870
4871         /* fill in sg elements */
4872         if (use_sg > h->ioaccel_maxsg) {
4873                 cp->sg_count = 1;
4874                 cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
4875                 if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
4876                         atomic_dec(&phys_disk->ioaccel_cmds_out);
4877                         scsi_dma_unmap(cmd);
4878                         return -1;
4879                 }
4880         } else
4881                 cp->sg_count = (u8) use_sg;
4882
4883         enqueue_cmd_and_start_io(h, c);
4884         return 0;
4885 }
4886
4887 /*
4888  * Queue a command to the correct I/O accelerator path.
4889  */
4890 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
4891         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4892         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4893 {
4894         if (!c->scsi_cmd->device)
4895                 return -1;
4896
4897         if (!c->scsi_cmd->device->hostdata)
4898                 return -1;
4899
4900         /* Try to honor the device's queue depth */
4901         if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
4902                                         phys_disk->queue_depth) {
4903                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4904                 return IO_ACCEL_INELIGIBLE;
4905         }
4906         if (h->transMethod & CFGTBL_Trans_io_accel1)
4907                 return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
4908                                                 cdb, cdb_len, scsi3addr,
4909                                                 phys_disk);
4910         else
4911                 return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
4912                                                 cdb, cdb_len, scsi3addr,
4913                                                 phys_disk);
4914 }
4915
4916 static void raid_map_helper(struct raid_map_data *map,
4917                 int offload_to_mirror, u32 *map_index, u32 *current_group)
4918 {
4919         if (offload_to_mirror == 0)  {
4920                 /* use physical disk in the first mirrored group. */
4921                 *map_index %= le16_to_cpu(map->data_disks_per_row);
4922                 return;
4923         }
4924         do {
4925                 /* determine mirror group that *map_index indicates */
4926                 *current_group = *map_index /
4927                         le16_to_cpu(map->data_disks_per_row);
4928                 if (offload_to_mirror == *current_group)
4929                         continue;
4930                 if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
4931                         /* select map index from next group */
4932                         *map_index += le16_to_cpu(map->data_disks_per_row);
4933                         (*current_group)++;
4934                 } else {
4935                         /* select map index from first group */
4936                         *map_index %= le16_to_cpu(map->data_disks_per_row);
4937                         *current_group = 0;
4938                 }
4939         } while (offload_to_mirror != *current_group);
4940 }
4941
4942 /*
4943  * Attempt to perform offload RAID mapping for a logical volume I/O.
4944  */
4945 static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
4946         struct CommandList *c)
4947 {
4948         struct scsi_cmnd *cmd = c->scsi_cmd;
4949         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4950         struct raid_map_data *map = &dev->raid_map;
4951         struct raid_map_disk_data *dd = &map->data[0];
4952         int is_write = 0;
4953         u32 map_index;
4954         u64 first_block, last_block;
4955         u32 block_cnt;
4956         u32 blocks_per_row;
4957         u64 first_row, last_row;
4958         u32 first_row_offset, last_row_offset;
4959         u32 first_column, last_column;
4960         u64 r0_first_row, r0_last_row;
4961         u32 r5or6_blocks_per_row;
4962         u64 r5or6_first_row, r5or6_last_row;
4963         u32 r5or6_first_row_offset, r5or6_last_row_offset;
4964         u32 r5or6_first_column, r5or6_last_column;
4965         u32 total_disks_per_row;
4966         u32 stripesize;
4967         u32 first_group, last_group, current_group;
4968         u32 map_row;
4969         u32 disk_handle;
4970         u64 disk_block;
4971         u32 disk_block_cnt;
4972         u8 cdb[16];
4973         u8 cdb_len;
4974         u16 strip_size;
4975 #if BITS_PER_LONG == 32
4976         u64 tmpdiv;
4977 #endif
4978         int offload_to_mirror;
4979
4980         if (!dev)
4981                 return -1;
4982
4983         /* check for valid opcode, get LBA and block count */
4984         switch (cmd->cmnd[0]) {
4985         case WRITE_6:
4986                 is_write = 1;
4987         case READ_6:
4988                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
4989                                 (cmd->cmnd[2] << 8) |
4990                                 cmd->cmnd[3]);
4991                 block_cnt = cmd->cmnd[4];
4992                 if (block_cnt == 0)
4993                         block_cnt = 256;
4994                 break;
4995         case WRITE_10:
4996                 is_write = 1;
4997         case READ_10:
4998                 first_block =
4999                         (((u64) cmd->cmnd[2]) << 24) |
5000                         (((u64) cmd->cmnd[3]) << 16) |
5001                         (((u64) cmd->cmnd[4]) << 8) |
5002                         cmd->cmnd[5];
5003                 block_cnt =
5004                         (((u32) cmd->cmnd[7]) << 8) |
5005                         cmd->cmnd[8];
5006                 break;
5007         case WRITE_12:
5008                 is_write = 1;
5009         case READ_12:
5010                 first_block =
5011                         (((u64) cmd->cmnd[2]) << 24) |
5012                         (((u64) cmd->cmnd[3]) << 16) |
5013                         (((u64) cmd->cmnd[4]) << 8) |
5014                         cmd->cmnd[5];
5015                 block_cnt =
5016                         (((u32) cmd->cmnd[6]) << 24) |
5017                         (((u32) cmd->cmnd[7]) << 16) |
5018                         (((u32) cmd->cmnd[8]) << 8) |
5019                 cmd->cmnd[9];
5020                 break;
5021         case WRITE_16:
5022                 is_write = 1;
5023         case READ_16:
5024                 first_block =
5025                         (((u64) cmd->cmnd[2]) << 56) |
5026                         (((u64) cmd->cmnd[3]) << 48) |
5027                         (((u64) cmd->cmnd[4]) << 40) |
5028                         (((u64) cmd->cmnd[5]) << 32) |
5029                         (((u64) cmd->cmnd[6]) << 24) |
5030                         (((u64) cmd->cmnd[7]) << 16) |
5031                         (((u64) cmd->cmnd[8]) << 8) |
5032                         cmd->cmnd[9];
5033                 block_cnt =
5034                         (((u32) cmd->cmnd[10]) << 24) |
5035                         (((u32) cmd->cmnd[11]) << 16) |
5036                         (((u32) cmd->cmnd[12]) << 8) |
5037                         cmd->cmnd[13];
5038                 break;
5039         default:
5040                 return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
5041         }
5042         last_block = first_block + block_cnt - 1;
5043
5044         /* check for write to non-RAID-0 */
5045         if (is_write && dev->raid_level != 0)
5046                 return IO_ACCEL_INELIGIBLE;
5047
5048         /* check for invalid block or wraparound */
5049         if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
5050                 last_block < first_block)
5051                 return IO_ACCEL_INELIGIBLE;
5052
5053         /* calculate stripe information for the request */
5054         blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
5055                                 le16_to_cpu(map->strip_size);
5056         strip_size = le16_to_cpu(map->strip_size);
5057 #if BITS_PER_LONG == 32
5058         tmpdiv = first_block;
5059         (void) do_div(tmpdiv, blocks_per_row);
5060         first_row = tmpdiv;
5061         tmpdiv = last_block;
5062         (void) do_div(tmpdiv, blocks_per_row);
5063         last_row = tmpdiv;
5064         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5065         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5066         tmpdiv = first_row_offset;
5067         (void) do_div(tmpdiv, strip_size);
5068         first_column = tmpdiv;
5069         tmpdiv = last_row_offset;
5070         (void) do_div(tmpdiv, strip_size);
5071         last_column = tmpdiv;
5072 #else
5073         first_row = first_block / blocks_per_row;
5074         last_row = last_block / blocks_per_row;
5075         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5076         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5077         first_column = first_row_offset / strip_size;
5078         last_column = last_row_offset / strip_size;
5079 #endif
5080
5081         /* if this isn't a single row/column then give to the controller */
5082         if ((first_row != last_row) || (first_column != last_column))
5083                 return IO_ACCEL_INELIGIBLE;
5084
5085         /* proceeding with driver mapping */
5086         total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
5087                                 le16_to_cpu(map->metadata_disks_per_row);
5088         map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5089                                 le16_to_cpu(map->row_cnt);
5090         map_index = (map_row * total_disks_per_row) + first_column;
5091
5092         switch (dev->raid_level) {
5093         case HPSA_RAID_0:
5094                 break; /* nothing special to do */
5095         case HPSA_RAID_1:
5096                 /* Handles load balance across RAID 1 members.
5097                  * (2-drive R1 and R10 with even # of drives.)
5098                  * Appropriate for SSDs, not optimal for HDDs
5099                  */
5100                 BUG_ON(le16_to_cpu(map->layout_map_count) != 2);
5101                 if (dev->offload_to_mirror)
5102                         map_index += le16_to_cpu(map->data_disks_per_row);
5103                 dev->offload_to_mirror = !dev->offload_to_mirror;
5104                 break;
5105         case HPSA_RAID_ADM:
5106                 /* Handles N-way mirrors  (R1-ADM)
5107                  * and R10 with # of drives divisible by 3.)
5108                  */
5109                 BUG_ON(le16_to_cpu(map->layout_map_count) != 3);
5110
5111                 offload_to_mirror = dev->offload_to_mirror;
5112                 raid_map_helper(map, offload_to_mirror,
5113                                 &map_index, &current_group);
5114                 /* set mirror group to use next time */
5115                 offload_to_mirror =
5116                         (offload_to_mirror >=
5117                         le16_to_cpu(map->layout_map_count) - 1)
5118                         ? 0 : offload_to_mirror + 1;
5119                 dev->offload_to_mirror = offload_to_mirror;
5120                 /* Avoid direct use of dev->offload_to_mirror within this
5121                  * function since multiple threads might simultaneously
5122                  * increment it beyond the range of dev->layout_map_count -1.
5123                  */
5124                 break;
5125         case HPSA_RAID_5:
5126         case HPSA_RAID_6:
5127                 if (le16_to_cpu(map->layout_map_count) <= 1)
5128                         break;
5129
5130                 /* Verify first and last block are in same RAID group */
5131                 r5or6_blocks_per_row =
5132                         le16_to_cpu(map->strip_size) *
5133                         le16_to_cpu(map->data_disks_per_row);
5134                 BUG_ON(r5or6_blocks_per_row == 0);
5135                 stripesize = r5or6_blocks_per_row *
5136                         le16_to_cpu(map->layout_map_count);
5137 #if BITS_PER_LONG == 32
5138                 tmpdiv = first_block;
5139                 first_group = do_div(tmpdiv, stripesize);
5140                 tmpdiv = first_group;
5141                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5142                 first_group = tmpdiv;
5143                 tmpdiv = last_block;
5144                 last_group = do_div(tmpdiv, stripesize);
5145                 tmpdiv = last_group;
5146                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5147                 last_group = tmpdiv;
5148 #else
5149                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
5150                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
5151 #endif
5152                 if (first_group != last_group)
5153                         return IO_ACCEL_INELIGIBLE;
5154
5155                 /* Verify request is in a single row of RAID 5/6 */
5156 #if BITS_PER_LONG == 32
5157                 tmpdiv = first_block;
5158                 (void) do_div(tmpdiv, stripesize);
5159                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
5160                 tmpdiv = last_block;
5161                 (void) do_div(tmpdiv, stripesize);
5162                 r5or6_last_row = r0_last_row = tmpdiv;
5163 #else
5164                 first_row = r5or6_first_row = r0_first_row =
5165                                                 first_block / stripesize;
5166                 r5or6_last_row = r0_last_row = last_block / stripesize;
5167 #endif
5168                 if (r5or6_first_row != r5or6_last_row)
5169                         return IO_ACCEL_INELIGIBLE;
5170
5171
5172                 /* Verify request is in a single column */
5173 #if BITS_PER_LONG == 32
5174                 tmpdiv = first_block;
5175                 first_row_offset = do_div(tmpdiv, stripesize);
5176                 tmpdiv = first_row_offset;
5177                 first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
5178                 r5or6_first_row_offset = first_row_offset;
5179                 tmpdiv = last_block;
5180                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
5181                 tmpdiv = r5or6_last_row_offset;
5182                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
5183                 tmpdiv = r5or6_first_row_offset;
5184                 (void) do_div(tmpdiv, map->strip_size);
5185                 first_column = r5or6_first_column = tmpdiv;
5186                 tmpdiv = r5or6_last_row_offset;
5187                 (void) do_div(tmpdiv, map->strip_size);
5188                 r5or6_last_column = tmpdiv;
5189 #else
5190                 first_row_offset = r5or6_first_row_offset =
5191                         (u32)((first_block % stripesize) %
5192                                                 r5or6_blocks_per_row);
5193
5194                 r5or6_last_row_offset =
5195                         (u32)((last_block % stripesize) %
5196                                                 r5or6_blocks_per_row);
5197
5198                 first_column = r5or6_first_column =
5199                         r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5200                 r5or6_last_column =
5201                         r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5202 #endif
5203                 if (r5or6_first_column != r5or6_last_column)
5204                         return IO_ACCEL_INELIGIBLE;
5205
5206                 /* Request is eligible */
5207                 map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5208                         le16_to_cpu(map->row_cnt);
5209
5210                 map_index = (first_group *
5211                         (le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5212                         (map_row * total_disks_per_row) + first_column;
5213                 break;
5214         default:
5215                 return IO_ACCEL_INELIGIBLE;
5216         }
5217
5218         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
5219                 return IO_ACCEL_INELIGIBLE;
5220
5221         c->phys_disk = dev->phys_disk[map_index];
5222         if (!c->phys_disk)
5223                 return IO_ACCEL_INELIGIBLE;
5224
5225         disk_handle = dd[map_index].ioaccel_handle;
5226         disk_block = le64_to_cpu(map->disk_starting_blk) +
5227                         first_row * le16_to_cpu(map->strip_size) +
5228                         (first_row_offset - first_column *
5229                         le16_to_cpu(map->strip_size));
5230         disk_block_cnt = block_cnt;
5231
5232         /* handle differing logical/physical block sizes */
5233         if (map->phys_blk_shift) {
5234                 disk_block <<= map->phys_blk_shift;
5235                 disk_block_cnt <<= map->phys_blk_shift;
5236         }
5237         BUG_ON(disk_block_cnt > 0xffff);
5238
5239         /* build the new CDB for the physical disk I/O */
5240         if (disk_block > 0xffffffff) {
5241                 cdb[0] = is_write ? WRITE_16 : READ_16;
5242                 cdb[1] = 0;
5243                 cdb[2] = (u8) (disk_block >> 56);
5244                 cdb[3] = (u8) (disk_block >> 48);
5245                 cdb[4] = (u8) (disk_block >> 40);
5246                 cdb[5] = (u8) (disk_block >> 32);
5247                 cdb[6] = (u8) (disk_block >> 24);
5248                 cdb[7] = (u8) (disk_block >> 16);
5249                 cdb[8] = (u8) (disk_block >> 8);
5250                 cdb[9] = (u8) (disk_block);
5251                 cdb[10] = (u8) (disk_block_cnt >> 24);
5252                 cdb[11] = (u8) (disk_block_cnt >> 16);
5253                 cdb[12] = (u8) (disk_block_cnt >> 8);
5254                 cdb[13] = (u8) (disk_block_cnt);
5255                 cdb[14] = 0;
5256                 cdb[15] = 0;
5257                 cdb_len = 16;
5258         } else {
5259                 cdb[0] = is_write ? WRITE_10 : READ_10;
5260                 cdb[1] = 0;
5261                 cdb[2] = (u8) (disk_block >> 24);
5262                 cdb[3] = (u8) (disk_block >> 16);
5263                 cdb[4] = (u8) (disk_block >> 8);
5264                 cdb[5] = (u8) (disk_block);
5265                 cdb[6] = 0;
5266                 cdb[7] = (u8) (disk_block_cnt >> 8);
5267                 cdb[8] = (u8) (disk_block_cnt);
5268                 cdb[9] = 0;
5269                 cdb_len = 10;
5270         }
5271         return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
5272                                                 dev->scsi3addr,
5273                                                 dev->phys_disk[map_index]);
5274 }
5275
5276 /*
5277  * Submit commands down the "normal" RAID stack path
5278  * All callers to hpsa_ciss_submit must check lockup_detected
5279  * beforehand, before (opt.) and after calling cmd_alloc
5280  */
5281 static int hpsa_ciss_submit(struct ctlr_info *h,
5282         struct CommandList *c, struct scsi_cmnd *cmd,
5283         unsigned char scsi3addr[])
5284 {
5285         cmd->host_scribble = (unsigned char *) c;
5286         c->cmd_type = CMD_SCSI;
5287         c->scsi_cmd = cmd;
5288         c->Header.ReplyQueue = 0;  /* unused in simple mode */
5289         memcpy(&c->Header.LUN.LunAddrBytes[0], &scsi3addr[0], 8);
5290         c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5291
5292         /* Fill in the request block... */
5293
5294         c->Request.Timeout = 0;
5295         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
5296         c->Request.CDBLen = cmd->cmd_len;
5297         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
5298         switch (cmd->sc_data_direction) {
5299         case DMA_TO_DEVICE:
5300                 c->Request.type_attr_dir =
5301                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5302                 break;
5303         case DMA_FROM_DEVICE:
5304                 c->Request.type_attr_dir =
5305                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5306                 break;
5307         case DMA_NONE:
5308                 c->Request.type_attr_dir =
5309                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5310                 break;
5311         case DMA_BIDIRECTIONAL:
5312                 /* This can happen if a buggy application does a scsi passthru
5313                  * and sets both inlen and outlen to non-zero. ( see
5314                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
5315                  */
5316
5317                 c->Request.type_attr_dir =
5318                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5319                 /* This is technically wrong, and hpsa controllers should
5320                  * reject it with CMD_INVALID, which is the most correct
5321                  * response, but non-fibre backends appear to let it
5322                  * slide by, and give the same results as if this field
5323                  * were set correctly.  Either way is acceptable for
5324                  * our purposes here.
5325                  */
5326
5327                 break;
5328
5329         default:
5330                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
5331                         cmd->sc_data_direction);
5332                 BUG();
5333                 break;
5334         }
5335
5336         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5337                 hpsa_cmd_resolve_and_free(h, c);
5338                 return SCSI_MLQUEUE_HOST_BUSY;
5339         }
5340         enqueue_cmd_and_start_io(h, c);
5341         /* the cmd'll come back via intr handler in complete_scsi_command()  */
5342         return 0;
5343 }
5344
5345 static void hpsa_cmd_init(struct ctlr_info *h, int index,
5346                                 struct CommandList *c)
5347 {
5348         dma_addr_t cmd_dma_handle, err_dma_handle;
5349
5350         /* Zero out all of commandlist except the last field, refcount */
5351         memset(c, 0, offsetof(struct CommandList, refcount));
5352         c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
5353         cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5354         c->err_info = h->errinfo_pool + index;
5355         memset(c->err_info, 0, sizeof(*c->err_info));
5356         err_dma_handle = h->errinfo_pool_dhandle
5357             + index * sizeof(*c->err_info);
5358         c->cmdindex = index;
5359         c->busaddr = (u32) cmd_dma_handle;
5360         c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
5361         c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
5362         c->h = h;
5363         c->scsi_cmd = SCSI_CMD_IDLE;
5364 }
5365
5366 static void hpsa_preinitialize_commands(struct ctlr_info *h)
5367 {
5368         int i;
5369
5370         for (i = 0; i < h->nr_cmds; i++) {
5371                 struct CommandList *c = h->cmd_pool + i;
5372
5373                 hpsa_cmd_init(h, i, c);
5374                 atomic_set(&c->refcount, 0);
5375         }
5376 }
5377
5378 static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
5379                                 struct CommandList *c)
5380 {
5381         dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5382
5383         BUG_ON(c->cmdindex != index);
5384
5385         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
5386         memset(c->err_info, 0, sizeof(*c->err_info));
5387         c->busaddr = (u32) cmd_dma_handle;
5388 }
5389
5390 static int hpsa_ioaccel_submit(struct ctlr_info *h,
5391                 struct CommandList *c, struct scsi_cmnd *cmd,
5392                 unsigned char *scsi3addr)
5393 {
5394         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5395         int rc = IO_ACCEL_INELIGIBLE;
5396
5397         if (!dev)
5398                 return SCSI_MLQUEUE_HOST_BUSY;
5399
5400         cmd->host_scribble = (unsigned char *) c;
5401
5402         if (dev->offload_enabled) {
5403                 hpsa_cmd_init(h, c->cmdindex, c);
5404                 c->cmd_type = CMD_SCSI;
5405                 c->scsi_cmd = cmd;
5406                 rc = hpsa_scsi_ioaccel_raid_map(h, c);
5407                 if (rc < 0)     /* scsi_dma_map failed. */
5408                         rc = SCSI_MLQUEUE_HOST_BUSY;
5409         } else if (dev->hba_ioaccel_enabled) {
5410                 hpsa_cmd_init(h, c->cmdindex, c);
5411                 c->cmd_type = CMD_SCSI;
5412                 c->scsi_cmd = cmd;
5413                 rc = hpsa_scsi_ioaccel_direct_map(h, c);
5414                 if (rc < 0)     /* scsi_dma_map failed. */
5415                         rc = SCSI_MLQUEUE_HOST_BUSY;
5416         }
5417         return rc;
5418 }
5419
5420 static void hpsa_command_resubmit_worker(struct work_struct *work)
5421 {
5422         struct scsi_cmnd *cmd;
5423         struct hpsa_scsi_dev_t *dev;
5424         struct CommandList *c = container_of(work, struct CommandList, work);
5425
5426         cmd = c->scsi_cmd;
5427         dev = cmd->device->hostdata;
5428         if (!dev) {
5429                 cmd->result = DID_NO_CONNECT << 16;
5430                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5431         }
5432         if (c->reset_pending)
5433                 return hpsa_cmd_resolve_and_free(c->h, c);
5434         if (c->abort_pending)
5435                 return hpsa_cmd_abort_and_free(c->h, c, cmd);
5436         if (c->cmd_type == CMD_IOACCEL2) {
5437                 struct ctlr_info *h = c->h;
5438                 struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5439                 int rc;
5440
5441                 if (c2->error_data.serv_response ==
5442                                 IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
5443                         rc = hpsa_ioaccel_submit(h, c, cmd, dev->scsi3addr);
5444                         if (rc == 0)
5445                                 return;
5446                         if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5447                                 /*
5448                                  * If we get here, it means dma mapping failed.
5449                                  * Try again via scsi mid layer, which will
5450                                  * then get SCSI_MLQUEUE_HOST_BUSY.
5451                                  */
5452                                 cmd->result = DID_IMM_RETRY << 16;
5453                                 return hpsa_cmd_free_and_done(h, c, cmd);
5454                         }
5455                         /* else, fall thru and resubmit down CISS path */
5456                 }
5457         }
5458         hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5459         if (hpsa_ciss_submit(c->h, c, cmd, dev->scsi3addr)) {
5460                 /*
5461                  * If we get here, it means dma mapping failed. Try
5462                  * again via scsi mid layer, which will then get
5463                  * SCSI_MLQUEUE_HOST_BUSY.
5464                  *
5465                  * hpsa_ciss_submit will have already freed c
5466                  * if it encountered a dma mapping failure.
5467                  */
5468                 cmd->result = DID_IMM_RETRY << 16;
5469                 cmd->scsi_done(cmd);
5470         }
5471 }
5472
5473 /* Running in struct Scsi_Host->host_lock less mode */
5474 static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
5475 {
5476         struct ctlr_info *h;
5477         struct hpsa_scsi_dev_t *dev;
5478         unsigned char scsi3addr[8];
5479         struct CommandList *c;
5480         int rc = 0;
5481
5482         /* Get the ptr to our adapter structure out of cmd->host. */
5483         h = sdev_to_hba(cmd->device);
5484
5485         BUG_ON(cmd->request->tag < 0);
5486
5487         dev = cmd->device->hostdata;
5488         if (!dev) {
5489                 cmd->result = NOT_READY << 16; /* host byte */
5490                 cmd->scsi_done(cmd);
5491                 return 0;
5492         }
5493
5494         if (dev->removed) {
5495                 cmd->result = DID_NO_CONNECT << 16;
5496                 cmd->scsi_done(cmd);
5497                 return 0;
5498         }
5499
5500         memcpy(scsi3addr, dev->scsi3addr, sizeof(scsi3addr));
5501
5502         if (unlikely(lockup_detected(h))) {
5503                 cmd->result = DID_NO_CONNECT << 16;
5504                 cmd->scsi_done(cmd);
5505                 return 0;
5506         }
5507         c = cmd_tagged_alloc(h, cmd);
5508
5509         /*
5510          * Call alternate submit routine for I/O accelerated commands.
5511          * Retries always go down the normal I/O path.
5512          */
5513         if (likely(cmd->retries == 0 &&
5514                 cmd->request->cmd_type == REQ_TYPE_FS &&
5515                 h->acciopath_status)) {
5516                 rc = hpsa_ioaccel_submit(h, c, cmd, scsi3addr);
5517                 if (rc == 0)
5518                         return 0;
5519                 if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5520                         hpsa_cmd_resolve_and_free(h, c);
5521                         return SCSI_MLQUEUE_HOST_BUSY;
5522                 }
5523         }
5524         return hpsa_ciss_submit(h, c, cmd, scsi3addr);
5525 }
5526
5527 static void hpsa_scan_complete(struct ctlr_info *h)
5528 {
5529         unsigned long flags;
5530
5531         spin_lock_irqsave(&h->scan_lock, flags);
5532         h->scan_finished = 1;
5533         wake_up(&h->scan_wait_queue);
5534         spin_unlock_irqrestore(&h->scan_lock, flags);
5535 }
5536
5537 static void hpsa_scan_start(struct Scsi_Host *sh)
5538 {
5539         struct ctlr_info *h = shost_to_hba(sh);
5540         unsigned long flags;
5541
5542         /*
5543          * Don't let rescans be initiated on a controller known to be locked
5544          * up.  If the controller locks up *during* a rescan, that thread is
5545          * probably hosed, but at least we can prevent new rescan threads from
5546          * piling up on a locked up controller.
5547          */
5548         if (unlikely(lockup_detected(h)))
5549                 return hpsa_scan_complete(h);
5550
5551         /*
5552          * If a scan is already waiting to run, no need to add another
5553          */
5554         spin_lock_irqsave(&h->scan_lock, flags);
5555         if (h->scan_waiting) {
5556                 spin_unlock_irqrestore(&h->scan_lock, flags);
5557                 return;
5558         }
5559
5560         spin_unlock_irqrestore(&h->scan_lock, flags);
5561
5562         /* wait until any scan already in progress is finished. */
5563         while (1) {
5564                 spin_lock_irqsave(&h->scan_lock, flags);
5565                 if (h->scan_finished)
5566                         break;
5567                 h->scan_waiting = 1;
5568                 spin_unlock_irqrestore(&h->scan_lock, flags);
5569                 wait_event(h->scan_wait_queue, h->scan_finished);
5570                 /* Note: We don't need to worry about a race between this
5571                  * thread and driver unload because the midlayer will
5572                  * have incremented the reference count, so unload won't
5573                  * happen if we're in here.
5574                  */
5575         }
5576         h->scan_finished = 0; /* mark scan as in progress */
5577         h->scan_waiting = 0;
5578         spin_unlock_irqrestore(&h->scan_lock, flags);
5579
5580         if (unlikely(lockup_detected(h)))
5581                 return hpsa_scan_complete(h);
5582
5583         hpsa_update_scsi_devices(h);
5584
5585         hpsa_scan_complete(h);
5586 }
5587
5588 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
5589 {
5590         struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;
5591
5592         if (!logical_drive)
5593                 return -ENODEV;
5594
5595         if (qdepth < 1)
5596                 qdepth = 1;
5597         else if (qdepth > logical_drive->queue_depth)
5598                 qdepth = logical_drive->queue_depth;
5599
5600         return scsi_change_queue_depth(sdev, qdepth);
5601 }
5602
5603 static int hpsa_scan_finished(struct Scsi_Host *sh,
5604         unsigned long elapsed_time)
5605 {
5606         struct ctlr_info *h = shost_to_hba(sh);
5607         unsigned long flags;
5608         int finished;
5609
5610         spin_lock_irqsave(&h->scan_lock, flags);
5611         finished = h->scan_finished;
5612         spin_unlock_irqrestore(&h->scan_lock, flags);
5613         return finished;
5614 }
5615
5616 static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5617 {
5618         struct Scsi_Host *sh;
5619
5620         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5621         if (sh == NULL) {
5622                 dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
5623                 return -ENOMEM;
5624         }
5625
5626         sh->io_port = 0;
5627         sh->n_io_port = 0;
5628         sh->this_id = -1;
5629         sh->max_channel = 3;
5630         sh->max_cmd_len = MAX_COMMAND_SIZE;
5631         sh->max_lun = HPSA_MAX_LUN;
5632         sh->max_id = HPSA_MAX_LUN;
5633         sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5634         sh->cmd_per_lun = sh->can_queue;
5635         sh->sg_tablesize = h->maxsgentries;
5636         sh->transportt = hpsa_sas_transport_template;
5637         sh->hostdata[0] = (unsigned long) h;
5638         sh->irq = h->intr[h->intr_mode];
5639         sh->unique_id = sh->irq;
5640
5641         h->scsi_host = sh;
5642         return 0;
5643 }
5644
5645 static int hpsa_scsi_add_host(struct ctlr_info *h)
5646 {
5647         int rv;
5648
5649         rv = scsi_add_host(h->scsi_host, &h->pdev->dev);
5650         if (rv) {
5651                 dev_err(&h->pdev->dev, "scsi_add_host failed\n");
5652                 return rv;
5653         }
5654         scsi_scan_host(h->scsi_host);
5655         return 0;
5656 }
5657
5658 /*
5659  * The block layer has already gone to the trouble of picking out a unique,
5660  * small-integer tag for this request.  We use an offset from that value as
5661  * an index to select our command block.  (The offset allows us to reserve the
5662  * low-numbered entries for our own uses.)
5663  */
5664 static int hpsa_get_cmd_index(struct scsi_cmnd *scmd)
5665 {
5666         int idx = scmd->request->tag;
5667
5668         if (idx < 0)
5669                 return idx;
5670
5671         /* Offset to leave space for internal cmds. */
5672         return idx += HPSA_NRESERVED_CMDS;
5673 }
5674
5675 /*
5676  * Send a TEST_UNIT_READY command to the specified LUN using the specified
5677  * reply queue; returns zero if the unit is ready, and non-zero otherwise.
5678  */
5679 static int hpsa_send_test_unit_ready(struct ctlr_info *h,
5680                                 struct CommandList *c, unsigned char lunaddr[],
5681                                 int reply_queue)
5682 {
5683         int rc;
5684
5685         /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
5686         (void) fill_cmd(c, TEST_UNIT_READY, h,
5687                         NULL, 0, 0, lunaddr, TYPE_CMD);
5688         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5689         if (rc)
5690                 return rc;
5691         /* no unmap needed here because no data xfer. */
5692
5693         /* Check if the unit is already ready. */
5694         if (c->err_info->CommandStatus == CMD_SUCCESS)
5695                 return 0;
5696
5697         /*
5698          * The first command sent after reset will receive "unit attention" to
5699          * indicate that the LUN has been reset...this is actually what we're
5700          * looking for (but, success is good too).
5701          */
5702         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
5703                 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
5704                         (c->err_info->SenseInfo[2] == NO_SENSE ||
5705                          c->err_info->SenseInfo[2] == UNIT_ATTENTION))
5706                 return 0;
5707
5708         return 1;
5709 }
5710
5711 /*
5712  * Wait for a TEST_UNIT_READY command to complete, retrying as necessary;
5713  * returns zero when the unit is ready, and non-zero when giving up.
5714  */
5715 static int hpsa_wait_for_test_unit_ready(struct ctlr_info *h,
5716                                 struct CommandList *c,
5717                                 unsigned char lunaddr[], int reply_queue)
5718 {
5719         int rc;
5720         int count = 0;
5721         int waittime = 1; /* seconds */
5722
5723         /* Send test unit ready until device ready, or give up. */
5724         for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5725
5726                 /*
5727                  * Wait for a bit.  do this first, because if we send
5728                  * the TUR right away, the reset will just abort it.
5729                  */
5730                 msleep(1000 * waittime);
5731
5732                 rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
5733                 if (!rc)
5734                         break;
5735
5736                 /* Increase wait time with each try, up to a point. */
5737                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5738                         waittime *= 2;
5739
5740                 dev_warn(&h->pdev->dev,
5741                          "waiting %d secs for device to become ready.\n",
5742                          waittime);
5743         }
5744
5745         return rc;
5746 }
5747
5748 static int wait_for_device_to_become_ready(struct ctlr_info *h,
5749                                            unsigned char lunaddr[],
5750                                            int reply_queue)
5751 {
5752         int first_queue;
5753         int last_queue;
5754         int rq;
5755         int rc = 0;
5756         struct CommandList *c;
5757
5758         c = cmd_alloc(h);
5759
5760         /*
5761          * If no specific reply queue was requested, then send the TUR
5762          * repeatedly, requesting a reply on each reply queue; otherwise execute
5763          * the loop exactly once using only the specified queue.
5764          */
5765         if (reply_queue == DEFAULT_REPLY_QUEUE) {
5766                 first_queue = 0;
5767                 last_queue = h->nreply_queues - 1;
5768         } else {
5769                 first_queue = reply_queue;
5770                 last_queue = reply_queue;
5771         }
5772
5773         for (rq = first_queue; rq <= last_queue; rq++) {
5774                 rc = hpsa_wait_for_test_unit_ready(h, c, lunaddr, rq);
5775                 if (rc)
5776                         break;
5777         }
5778
5779         if (rc)
5780                 dev_warn(&h->pdev->dev, "giving up on device.\n");
5781         else
5782                 dev_warn(&h->pdev->dev, "device is ready.\n");
5783
5784         cmd_free(h, c);
5785         return rc;
5786 }
5787
5788 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
5789  * complaining.  Doing a host- or bus-reset can't do anything good here.
5790  */
5791 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
5792 {
5793         int rc;
5794         struct ctlr_info *h;
5795         struct hpsa_scsi_dev_t *dev;
5796         u8 reset_type;
5797         char msg[48];
5798
5799         /* find the controller to which the command to be aborted was sent */
5800         h = sdev_to_hba(scsicmd->device);
5801         if (h == NULL) /* paranoia */
5802                 return FAILED;
5803
5804         if (lockup_detected(h))
5805                 return FAILED;
5806
5807         dev = scsicmd->device->hostdata;
5808         if (!dev) {
5809                 dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
5810                 return FAILED;
5811         }
5812
5813         /* if controller locked up, we can guarantee command won't complete */
5814         if (lockup_detected(h)) {
5815                 snprintf(msg, sizeof(msg),
5816                          "cmd %d RESET FAILED, lockup detected",
5817                          hpsa_get_cmd_index(scsicmd));
5818                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5819                 return FAILED;
5820         }
5821
5822         /* this reset request might be the result of a lockup; check */
5823         if (detect_controller_lockup(h)) {
5824                 snprintf(msg, sizeof(msg),
5825                          "cmd %d RESET FAILED, new lockup detected",
5826                          hpsa_get_cmd_index(scsicmd));
5827                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5828                 return FAILED;
5829         }
5830
5831         /* Do not attempt on controller */
5832         if (is_hba_lunid(dev->scsi3addr))
5833                 return SUCCESS;
5834
5835         if (is_logical_dev_addr_mode(dev->scsi3addr))
5836                 reset_type = HPSA_DEVICE_RESET_MSG;
5837         else
5838                 reset_type = HPSA_PHYS_TARGET_RESET;
5839
5840         sprintf(msg, "resetting %s",
5841                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ");
5842         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5843
5844         h->reset_in_progress = 1;
5845
5846         /* send a reset to the SCSI LUN which the command was sent to */
5847         rc = hpsa_do_reset(h, dev, dev->scsi3addr, reset_type,
5848                            DEFAULT_REPLY_QUEUE);
5849         sprintf(msg, "reset %s %s",
5850                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
5851                 rc == 0 ? "completed successfully" : "failed");
5852         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
5853         h->reset_in_progress = 0;
5854         return rc == 0 ? SUCCESS : FAILED;
5855 }
5856
5857 static void swizzle_abort_tag(u8 *tag)
5858 {
5859         u8 original_tag[8];
5860
5861         memcpy(original_tag, tag, 8);
5862         tag[0] = original_tag[3];
5863         tag[1] = original_tag[2];
5864         tag[2] = original_tag[1];
5865         tag[3] = original_tag[0];
5866         tag[4] = original_tag[7];
5867         tag[5] = original_tag[6];
5868         tag[6] = original_tag[5];
5869         tag[7] = original_tag[4];
5870 }
5871
5872 static void hpsa_get_tag(struct ctlr_info *h,
5873         struct CommandList *c, __le32 *taglower, __le32 *tagupper)
5874 {
5875         u64 tag;
5876         if (c->cmd_type == CMD_IOACCEL1) {
5877                 struct io_accel1_cmd *cm1 = (struct io_accel1_cmd *)
5878                         &h->ioaccel_cmd_pool[c->cmdindex];
5879                 tag = le64_to_cpu(cm1->tag);
5880                 *tagupper = cpu_to_le32(tag >> 32);
5881                 *taglower = cpu_to_le32(tag);
5882                 return;
5883         }
5884         if (c->cmd_type == CMD_IOACCEL2) {
5885                 struct io_accel2_cmd *cm2 = (struct io_accel2_cmd *)
5886                         &h->ioaccel2_cmd_pool[c->cmdindex];
5887                 /* upper tag not used in ioaccel2 mode */
5888                 memset(tagupper, 0, sizeof(*tagupper));
5889                 *taglower = cm2->Tag;
5890                 return;
5891         }
5892         tag = le64_to_cpu(c->Header.tag);
5893         *tagupper = cpu_to_le32(tag >> 32);
5894         *taglower = cpu_to_le32(tag);
5895 }
5896
5897 static int hpsa_send_abort(struct ctlr_info *h, unsigned char *scsi3addr,
5898         struct CommandList *abort, int reply_queue)
5899 {
5900         int rc = IO_OK;
5901         struct CommandList *c;
5902         struct ErrorInfo *ei;
5903         __le32 tagupper, taglower;
5904
5905         c = cmd_alloc(h);
5906
5907         /* fill_cmd can't fail here, no buffer to map */
5908         (void) fill_cmd(c, HPSA_ABORT_MSG, h, &abort->Header.tag,
5909                 0, 0, scsi3addr, TYPE_MSG);
5910         if (h->needs_abort_tags_swizzled)
5911                 swizzle_abort_tag(&c->Request.CDB[4]);
5912         (void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
5913         hpsa_get_tag(h, abort, &taglower, &tagupper);
5914         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: do_simple_cmd(abort) completed.\n",
5915                 __func__, tagupper, taglower);
5916         /* no unmap needed here because no data xfer. */
5917
5918         ei = c->err_info;
5919         switch (ei->CommandStatus) {
5920         case CMD_SUCCESS:
5921                 break;
5922         case CMD_TMF_STATUS:
5923                 rc = hpsa_evaluate_tmf_status(h, c);
5924                 break;
5925         case CMD_UNABORTABLE: /* Very common, don't make noise. */
5926                 rc = -1;
5927                 break;
5928         default:
5929                 dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: interpreting error.\n",
5930                         __func__, tagupper, taglower);
5931                 hpsa_scsi_interpret_error(h, c);
5932                 rc = -1;
5933                 break;
5934         }
5935         cmd_free(h, c);
5936         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n",
5937                 __func__, tagupper, taglower);
5938         return rc;
5939 }
5940
5941 static void setup_ioaccel2_abort_cmd(struct CommandList *c, struct ctlr_info *h,
5942         struct CommandList *command_to_abort, int reply_queue)
5943 {
5944         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5945         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
5946         struct io_accel2_cmd *c2a =
5947                 &h->ioaccel2_cmd_pool[command_to_abort->cmdindex];
5948         struct scsi_cmnd *scmd = command_to_abort->scsi_cmd;
5949         struct hpsa_scsi_dev_t *dev = scmd->device->hostdata;
5950
5951         if (!dev)
5952                 return;
5953
5954         /*
5955          * We're overlaying struct hpsa_tmf_struct on top of something which
5956          * was allocated as a struct io_accel2_cmd, so we better be sure it
5957          * actually fits, and doesn't overrun the error info space.
5958          */
5959         BUILD_BUG_ON(sizeof(struct hpsa_tmf_struct) >
5960                         sizeof(struct io_accel2_cmd));
5961         BUG_ON(offsetof(struct io_accel2_cmd, error_data) <
5962                         offsetof(struct hpsa_tmf_struct, error_len) +
5963                                 sizeof(ac->error_len));
5964
5965         c->cmd_type = IOACCEL2_TMF;
5966         c->scsi_cmd = SCSI_CMD_BUSY;
5967
5968         /* Adjust the DMA address to point to the accelerated command buffer */
5969         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
5970                                 (c->cmdindex * sizeof(struct io_accel2_cmd));
5971         BUG_ON(c->busaddr & 0x0000007F);
5972
5973         memset(ac, 0, sizeof(*c2)); /* yes this is correct */
5974         ac->iu_type = IOACCEL2_IU_TMF_TYPE;
5975         ac->reply_queue = reply_queue;
5976         ac->tmf = IOACCEL2_TMF_ABORT;
5977         ac->it_nexus = cpu_to_le32(dev->ioaccel_handle);
5978         memset(ac->lun_id, 0, sizeof(ac->lun_id));
5979         ac->tag = cpu_to_le64(c->cmdindex << DIRECT_LOOKUP_SHIFT);
5980         ac->abort_tag = cpu_to_le64(le32_to_cpu(c2a->Tag));
5981         ac->error_ptr = cpu_to_le64(c->busaddr +
5982                         offsetof(struct io_accel2_cmd, error_data));
5983         ac->error_len = cpu_to_le32(sizeof(c2->error_data));
5984 }
5985
5986 /* ioaccel2 path firmware cannot handle abort task requests.
5987  * Change abort requests to physical target reset, and send to the
5988  * address of the physical disk used for the ioaccel 2 command.
5989  * Return 0 on success (IO_OK)
5990  *       -1 on failure
5991  */
5992
5993 static int hpsa_send_reset_as_abort_ioaccel2(struct ctlr_info *h,
5994         unsigned char *scsi3addr, struct CommandList *abort, int reply_queue)
5995 {
5996         int rc = IO_OK;
5997         struct scsi_cmnd *scmd; /* scsi command within request being aborted */
5998         struct hpsa_scsi_dev_t *dev; /* device to which scsi cmd was sent */
5999         unsigned char phys_scsi3addr[8]; /* addr of phys disk with volume */
6000         unsigned char *psa = &phys_scsi3addr[0];
6001
6002         /* Get a pointer to the hpsa logical device. */
6003         scmd = abort->scsi_cmd;
6004         dev = (struct hpsa_scsi_dev_t *)(scmd->device->hostdata);
6005         if (dev == NULL) {
6006                 dev_warn(&h->pdev->dev,
6007                         "Cannot abort: no device pointer for command.\n");
6008                         return -1; /* not abortable */
6009         }
6010
6011         if (h->raid_offload_debug > 0)
6012                 dev_info(&h->pdev->dev,
6013                         "scsi %d:%d:%d:%d %s scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
6014                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
6015                         "Reset as abort",
6016                         scsi3addr[0], scsi3addr[1], scsi3addr[2], scsi3addr[3],
6017                         scsi3addr[4], scsi3addr[5], scsi3addr[6], scsi3addr[7]);
6018
6019         if (!dev->offload_enabled) {
6020                 dev_warn(&h->pdev->dev,
6021                         "Can't abort: device is not operating in HP SSD Smart Path mode.\n");
6022                 return -1; /* not abortable */
6023         }
6024
6025         /* Incoming scsi3addr is logical addr. We need physical disk addr. */
6026         if (!hpsa_get_pdisk_of_ioaccel2(h, abort, psa)) {
6027                 dev_warn(&h->pdev->dev, "Can't abort: Failed lookup of physical address.\n");
6028                 return -1; /* not abortable */
6029         }
6030
6031         /* send the reset */
6032         if (h->raid_offload_debug > 0)
6033                 dev_info(&h->pdev->dev,
6034                         "Reset as abort: Resetting physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
6035                         psa[0], psa[1], psa[2], psa[3],
6036                         psa[4], psa[5], psa[6], psa[7]);
6037         rc = hpsa_do_reset(h, dev, psa, HPSA_PHYS_TARGET_RESET, reply_queue);
6038         if (rc != 0) {
6039                 dev_warn(&h->pdev->dev,
6040                         "Reset as abort: Failed on physical device at scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
6041                         psa[0], psa[1], psa[2], psa[3],
6042                         psa[4], psa[5], psa[6], psa[7]);
6043                 return rc; /* failed to reset */
6044         }
6045
6046         /* wait for device to recover */
6047         if (wait_for_device_to_become_ready(h, psa, reply_queue) != 0) {
6048                 dev_warn(&h->pdev->dev,
6049                         "Reset as abort: Failed: Device never recovered from reset: 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
6050                         psa[0], psa[1], psa[2], psa[3],
6051                         psa[4], psa[5], psa[6], psa[7]);
6052                 return -1;  /* failed to recover */
6053         }
6054
6055         /* device recovered */
6056         dev_info(&h->pdev->dev,
6057                 "Reset as abort: Device recovered from reset: scsi3addr 0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
6058                 psa[0], psa[1], psa[2], psa[3],
6059                 psa[4], psa[5], psa[6], psa[7]);
6060
6061         return rc; /* success */
6062 }
6063
6064 static int hpsa_send_abort_ioaccel2(struct ctlr_info *h,
6065         struct CommandList *abort, int reply_queue)
6066 {
6067         int rc = IO_OK;
6068         struct CommandList *c;
6069         __le32 taglower, tagupper;
6070         struct hpsa_scsi_dev_t *dev;
6071         struct io_accel2_cmd *c2;
6072
6073         dev = abort->scsi_cmd->device->hostdata;
6074         if (!dev)
6075                 return -1;
6076
6077         if (!dev->offload_enabled && !dev->hba_ioaccel_enabled)
6078                 return -1;
6079
6080         c = cmd_alloc(h);
6081         setup_ioaccel2_abort_cmd(c, h, abort, reply_queue);
6082         c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
6083         (void) hpsa_scsi_do_simple_cmd(h, c, reply_queue, DEFAULT_TIMEOUT);
6084         hpsa_get_tag(h, abort, &taglower, &tagupper);
6085         dev_dbg(&h->pdev->dev,
6086                 "%s: Tag:0x%08x:%08x: do_simple_cmd(ioaccel2 abort) completed.\n",
6087                 __func__, tagupper, taglower);
6088         /* no unmap needed here because no data xfer. */
6089
6090         dev_dbg(&h->pdev->dev,
6091                 "%s: Tag:0x%08x:%08x: abort service response = 0x%02x.\n",
6092                 __func__, tagupper, taglower, c2->error_data.serv_response);
6093         switch (c2->error_data.serv_response) {
6094         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
6095         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
6096                 rc = 0;
6097                 break;
6098         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
6099         case IOACCEL2_SERV_RESPONSE_FAILURE:
6100         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
6101                 rc = -1;
6102                 break;
6103         default:
6104                 dev_warn(&h->pdev->dev,
6105                         "%s: Tag:0x%08x:%08x: unknown abort service response 0x%02x\n",
6106                         __func__, tagupper, taglower,
6107                         c2->error_data.serv_response);
6108                 rc = -1;
6109         }
6110         cmd_free(h, c);
6111         dev_dbg(&h->pdev->dev, "%s: Tag:0x%08x:%08x: Finished.\n", __func__,
6112                 tagupper, taglower);
6113         return rc;
6114 }
6115
6116 static int hpsa_send_abort_both_ways(struct ctlr_info *h,
6117         struct hpsa_scsi_dev_t *dev, struct CommandList *abort, int reply_queue)
6118 {
6119         /*
6120          * ioccelerator mode 2 commands should be aborted via the
6121          * accelerated path, since RAID path is unaware of these commands,
6122          * but not all underlying firmware can handle abort TMF.
6123          * Change abort to physical device reset when abort TMF is unsupported.
6124          */
6125         if (abort->cmd_type == CMD_IOACCEL2) {
6126                 if ((HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags) ||
6127                         dev->physical_device)
6128                         return hpsa_send_abort_ioaccel2(h, abort,
6129                                                 reply_queue);
6130                 else
6131                         return hpsa_send_reset_as_abort_ioaccel2(h,
6132                                                         dev->scsi3addr,
6133                                                         abort, reply_queue);
6134         }
6135         return hpsa_send_abort(h, dev->scsi3addr, abort, reply_queue);
6136 }
6137
6138 /* Find out which reply queue a command was meant to return on */
6139 static int hpsa_extract_reply_queue(struct ctlr_info *h,
6140                                         struct CommandList *c)
6141 {
6142         if (c->cmd_type == CMD_IOACCEL2)
6143                 return h->ioaccel2_cmd_pool[c->cmdindex].reply_queue;
6144         return c->Header.ReplyQueue;
6145 }
6146
6147 /*
6148  * Limit concurrency of abort commands to prevent
6149  * over-subscription of commands
6150  */
6151 static inline int wait_for_available_abort_cmd(struct ctlr_info *h)
6152 {
6153 #define ABORT_CMD_WAIT_MSECS 5000
6154         return !wait_event_timeout(h->abort_cmd_wait_queue,
6155                         atomic_dec_if_positive(&h->abort_cmds_available) >= 0,
6156                         msecs_to_jiffies(ABORT_CMD_WAIT_MSECS));
6157 }
6158
6159 /* Send an abort for the specified command.
6160  *      If the device and controller support it,
6161  *              send a task abort request.
6162  */
6163 static int hpsa_eh_abort_handler(struct scsi_cmnd *sc)
6164 {
6165
6166         int rc;
6167         struct ctlr_info *h;
6168         struct hpsa_scsi_dev_t *dev;
6169         struct CommandList *abort; /* pointer to command to be aborted */
6170         struct scsi_cmnd *as;   /* ptr to scsi cmd inside aborted command. */
6171         char msg[256];          /* For debug messaging. */
6172         int ml = 0;
6173         __le32 tagupper, taglower;
6174         int refcount, reply_queue;
6175
6176         if (sc == NULL)
6177                 return FAILED;
6178
6179         if (sc->device == NULL)
6180                 return FAILED;
6181
6182         /* Find the controller of the command to be aborted */
6183         h = sdev_to_hba(sc->device);
6184         if (h == NULL)
6185                 return FAILED;
6186
6187         /* Find the device of the command to be aborted */
6188         dev = sc->device->hostdata;
6189         if (!dev) {
6190                 dev_err(&h->pdev->dev, "%s FAILED, Device lookup failed.\n",
6191                                 msg);
6192                 return FAILED;
6193         }
6194
6195         /* If controller locked up, we can guarantee command won't complete */
6196         if (lockup_detected(h)) {
6197                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6198                                         "ABORT FAILED, lockup detected");
6199                 return FAILED;
6200         }
6201
6202         /* This is a good time to check if controller lockup has occurred */
6203         if (detect_controller_lockup(h)) {
6204                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6205                                         "ABORT FAILED, new lockup detected");
6206                 return FAILED;
6207         }
6208
6209         /* Check that controller supports some kind of task abort */
6210         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags) &&
6211                 !(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
6212                 return FAILED;
6213
6214         memset(msg, 0, sizeof(msg));
6215         ml += sprintf(msg+ml, "scsi %d:%d:%d:%llu %s %p",
6216                 h->scsi_host->host_no, sc->device->channel,
6217                 sc->device->id, sc->device->lun,
6218                 "Aborting command", sc);
6219
6220         /* Get SCSI command to be aborted */
6221         abort = (struct CommandList *) sc->host_scribble;
6222         if (abort == NULL) {
6223                 /* This can happen if the command already completed. */
6224                 return SUCCESS;
6225         }
6226         refcount = atomic_inc_return(&abort->refcount);
6227         if (refcount == 1) { /* Command is done already. */
6228                 cmd_free(h, abort);
6229                 return SUCCESS;
6230         }
6231
6232         /* Don't bother trying the abort if we know it won't work. */
6233         if (abort->cmd_type != CMD_IOACCEL2 &&
6234                 abort->cmd_type != CMD_IOACCEL1 && !dev->supports_aborts) {
6235                 cmd_free(h, abort);
6236                 return FAILED;
6237         }
6238
6239         /*
6240          * Check that we're aborting the right command.
6241          * It's possible the CommandList already completed and got re-used.
6242          */
6243         if (abort->scsi_cmd != sc) {
6244                 cmd_free(h, abort);
6245                 return SUCCESS;
6246         }
6247
6248         abort->abort_pending = true;
6249         hpsa_get_tag(h, abort, &taglower, &tagupper);
6250         reply_queue = hpsa_extract_reply_queue(h, abort);
6251         ml += sprintf(msg+ml, "Tag:0x%08x:%08x ", tagupper, taglower);
6252         as  = abort->scsi_cmd;
6253         if (as != NULL)
6254                 ml += sprintf(msg+ml,
6255                         "CDBLen: %d CDB: 0x%02x%02x... SN: 0x%lx ",
6256                         as->cmd_len, as->cmnd[0], as->cmnd[1],
6257                         as->serial_number);
6258         dev_warn(&h->pdev->dev, "%s BEING SENT\n", msg);
6259         hpsa_show_dev_msg(KERN_WARNING, h, dev, "Aborting command");
6260
6261         /*
6262          * Command is in flight, or possibly already completed
6263          * by the firmware (but not to the scsi mid layer) but we can't
6264          * distinguish which.  Send the abort down.
6265          */
6266         if (wait_for_available_abort_cmd(h)) {
6267                 dev_warn(&h->pdev->dev,
6268                         "%s FAILED, timeout waiting for an abort command to become available.\n",
6269                         msg);
6270                 cmd_free(h, abort);
6271                 return FAILED;
6272         }
6273         rc = hpsa_send_abort_both_ways(h, dev, abort, reply_queue);
6274         atomic_inc(&h->abort_cmds_available);
6275         wake_up_all(&h->abort_cmd_wait_queue);
6276         if (rc != 0) {
6277                 dev_warn(&h->pdev->dev, "%s SENT, FAILED\n", msg);
6278                 hpsa_show_dev_msg(KERN_WARNING, h, dev,
6279                                 "FAILED to abort command");
6280                 cmd_free(h, abort);
6281                 return FAILED;
6282         }
6283         dev_info(&h->pdev->dev, "%s SENT, SUCCESS\n", msg);
6284         wait_event(h->event_sync_wait_queue,
6285                    abort->scsi_cmd != sc || lockup_detected(h));
6286         cmd_free(h, abort);
6287         return !lockup_detected(h) ? SUCCESS : FAILED;
6288 }
6289
6290 /*
6291  * For operations with an associated SCSI command, a command block is allocated
6292  * at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
6293  * block request tag as an index into a table of entries.  cmd_tagged_free() is
6294  * the complement, although cmd_free() may be called instead.
6295  */
6296 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
6297                                             struct scsi_cmnd *scmd)
6298 {
6299         int idx = hpsa_get_cmd_index(scmd);
6300         struct CommandList *c = h->cmd_pool + idx;
6301
6302         if (idx < HPSA_NRESERVED_CMDS || idx >= h->nr_cmds) {
6303                 dev_err(&h->pdev->dev, "Bad block tag: %d not in [%d..%d]\n",
6304                         idx, HPSA_NRESERVED_CMDS, h->nr_cmds - 1);
6305                 /* The index value comes from the block layer, so if it's out of
6306                  * bounds, it's probably not our bug.
6307                  */
6308                 BUG();
6309         }
6310
6311         atomic_inc(&c->refcount);
6312         if (unlikely(!hpsa_is_cmd_idle(c))) {
6313                 /*
6314                  * We expect that the SCSI layer will hand us a unique tag
6315                  * value.  Thus, there should never be a collision here between
6316                  * two requests...because if the selected command isn't idle
6317                  * then someone is going to be very disappointed.
6318                  */
6319                 dev_err(&h->pdev->dev,
6320                         "tag collision (tag=%d) in cmd_tagged_alloc().\n",
6321                         idx);
6322                 if (c->scsi_cmd != NULL)
6323                         scsi_print_command(c->scsi_cmd);
6324                 scsi_print_command(scmd);
6325         }
6326
6327         hpsa_cmd_partial_init(h, idx, c);
6328         return c;
6329 }
6330
6331 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
6332 {
6333         /*
6334          * Release our reference to the block.  We don't need to do anything
6335          * else to free it, because it is accessed by index.  (There's no point
6336          * in checking the result of the decrement, since we cannot guarantee
6337          * that there isn't a concurrent abort which is also accessing it.)
6338          */
6339         (void)atomic_dec(&c->refcount);
6340 }
6341
6342 /*
6343  * For operations that cannot sleep, a command block is allocated at init,
6344  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
6345  * which ones are free or in use.  Lock must be held when calling this.
6346  * cmd_free() is the complement.
6347  * This function never gives up and returns NULL.  If it hangs,
6348  * another thread must call cmd_free() to free some tags.
6349  */
6350
6351 static struct CommandList *cmd_alloc(struct ctlr_info *h)
6352 {
6353         struct CommandList *c;
6354         int refcount, i;
6355         int offset = 0;
6356
6357         /*
6358          * There is some *extremely* small but non-zero chance that that
6359          * multiple threads could get in here, and one thread could
6360          * be scanning through the list of bits looking for a free
6361          * one, but the free ones are always behind him, and other
6362          * threads sneak in behind him and eat them before he can
6363          * get to them, so that while there is always a free one, a
6364          * very unlucky thread might be starved anyway, never able to
6365          * beat the other threads.  In reality, this happens so
6366          * infrequently as to be indistinguishable from never.
6367          *
6368          * Note that we start allocating commands before the SCSI host structure
6369          * is initialized.  Since the search starts at bit zero, this
6370          * all works, since we have at least one command structure available;
6371          * however, it means that the structures with the low indexes have to be
6372          * reserved for driver-initiated requests, while requests from the block
6373          * layer will use the higher indexes.
6374          */
6375
6376         for (;;) {
6377                 i = find_next_zero_bit(h->cmd_pool_bits,
6378                                         HPSA_NRESERVED_CMDS,
6379                                         offset);
6380                 if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6381                         offset = 0;
6382                         continue;
6383                 }
6384                 c = h->cmd_pool + i;
6385                 refcount = atomic_inc_return(&c->refcount);
6386                 if (unlikely(refcount > 1)) {
6387                         cmd_free(h, c); /* already in use */
6388                         offset = (i + 1) % HPSA_NRESERVED_CMDS;
6389                         continue;
6390                 }
6391                 set_bit(i & (BITS_PER_LONG - 1),
6392                         h->cmd_pool_bits + (i / BITS_PER_LONG));
6393                 break; /* it's ours now. */
6394         }
6395         hpsa_cmd_partial_init(h, i, c);
6396         return c;
6397 }
6398
6399 /*
6400  * This is the complementary operation to cmd_alloc().  Note, however, in some
6401  * corner cases it may also be used to free blocks allocated by
6402  * cmd_tagged_alloc() in which case the ref-count decrement does the trick and
6403  * the clear-bit is harmless.
6404  */
6405 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
6406 {
6407         if (atomic_dec_and_test(&c->refcount)) {
6408                 int i;
6409
6410                 i = c - h->cmd_pool;
6411                 clear_bit(i & (BITS_PER_LONG - 1),
6412                           h->cmd_pool_bits + (i / BITS_PER_LONG));
6413         }
6414 }
6415
6416 #ifdef CONFIG_COMPAT
6417
6418 static int hpsa_ioctl32_passthru(struct scsi_device *dev, int cmd,
6419         void __user *arg)
6420 {
6421         IOCTL32_Command_struct __user *arg32 =
6422             (IOCTL32_Command_struct __user *) arg;
6423         IOCTL_Command_struct arg64;
6424         IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
6425         int err;
6426         u32 cp;
6427
6428         memset(&arg64, 0, sizeof(arg64));
6429         err = 0;
6430         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6431                            sizeof(arg64.LUN_info));
6432         err |= copy_from_user(&arg64.Request, &arg32->Request,
6433                            sizeof(arg64.Request));
6434         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6435                            sizeof(arg64.error_info));
6436         err |= get_user(arg64.buf_size, &arg32->buf_size);
6437         err |= get_user(cp, &arg32->buf);
6438         arg64.buf = compat_ptr(cp);
6439         err |= copy_to_user(p, &arg64, sizeof(arg64));
6440
6441         if (err)
6442                 return -EFAULT;
6443
6444         err = hpsa_ioctl(dev, CCISS_PASSTHRU, p);
6445         if (err)
6446                 return err;
6447         err |= copy_in_user(&arg32->error_info, &p->error_info,
6448                          sizeof(arg32->error_info));
6449         if (err)
6450                 return -EFAULT;
6451         return err;
6452 }
6453
6454 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
6455         int cmd, void __user *arg)
6456 {
6457         BIG_IOCTL32_Command_struct __user *arg32 =
6458             (BIG_IOCTL32_Command_struct __user *) arg;
6459         BIG_IOCTL_Command_struct arg64;
6460         BIG_IOCTL_Command_struct __user *p =
6461             compat_alloc_user_space(sizeof(arg64));
6462         int err;
6463         u32 cp;
6464
6465         memset(&arg64, 0, sizeof(arg64));
6466         err = 0;
6467         err |= copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
6468                            sizeof(arg64.LUN_info));
6469         err |= copy_from_user(&arg64.Request, &arg32->Request,
6470                            sizeof(arg64.Request));
6471         err |= copy_from_user(&arg64.error_info, &arg32->error_info,
6472                            sizeof(arg64.error_info));
6473         err |= get_user(arg64.buf_size, &arg32->buf_size);
6474         err |= get_user(arg64.malloc_size, &arg32->malloc_size);
6475         err |= get_user(cp, &arg32->buf);
6476         arg64.buf = compat_ptr(cp);
6477         err |= copy_to_user(p, &arg64, sizeof(arg64));
6478
6479         if (err)
6480                 return -EFAULT;
6481
6482         err = hpsa_ioctl(dev, CCISS_BIG_PASSTHRU, p);
6483         if (err)
6484                 return err;
6485         err |= copy_in_user(&arg32->error_info, &p->error_info,
6486                          sizeof(arg32->error_info));
6487         if (err)
6488                 return -EFAULT;
6489         return err;
6490 }
6491
6492 static int hpsa_compat_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6493 {
6494         switch (cmd) {
6495         case CCISS_GETPCIINFO:
6496         case CCISS_GETINTINFO:
6497         case CCISS_SETINTINFO:
6498         case CCISS_GETNODENAME:
6499         case CCISS_SETNODENAME:
6500         case CCISS_GETHEARTBEAT:
6501         case CCISS_GETBUSTYPES:
6502         case CCISS_GETFIRMVER:
6503         case CCISS_GETDRIVVER:
6504         case CCISS_REVALIDVOLS:
6505         case CCISS_DEREGDISK:
6506         case CCISS_REGNEWDISK:
6507         case CCISS_REGNEWD:
6508         case CCISS_RESCANDISK:
6509         case CCISS_GETLUNINFO:
6510                 return hpsa_ioctl(dev, cmd, arg);
6511
6512         case CCISS_PASSTHRU32:
6513                 return hpsa_ioctl32_passthru(dev, cmd, arg);
6514         case CCISS_BIG_PASSTHRU32:
6515                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
6516
6517         default:
6518                 return -ENOIOCTLCMD;
6519         }
6520 }
6521 #endif
6522
6523 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
6524 {
6525         struct hpsa_pci_info pciinfo;
6526
6527         if (!argp)
6528                 return -EINVAL;
6529         pciinfo.domain = pci_domain_nr(h->pdev->bus);
6530         pciinfo.bus = h->pdev->bus->number;
6531         pciinfo.dev_fn = h->pdev->devfn;
6532         pciinfo.board_id = h->board_id;
6533         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
6534                 return -EFAULT;
6535         return 0;
6536 }
6537
6538 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
6539 {
6540         DriverVer_type DriverVer;
6541         unsigned char vmaj, vmin, vsubmin;
6542         int rc;
6543
6544         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
6545                 &vmaj, &vmin, &vsubmin);
6546         if (rc != 3) {
6547                 dev_info(&h->pdev->dev, "driver version string '%s' "
6548                         "unrecognized.", HPSA_DRIVER_VERSION);
6549                 vmaj = 0;
6550                 vmin = 0;
6551                 vsubmin = 0;
6552         }
6553         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
6554         if (!argp)
6555                 return -EINVAL;
6556         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
6557                 return -EFAULT;
6558         return 0;
6559 }
6560
6561 static int hpsa_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6562 {
6563         IOCTL_Command_struct iocommand;
6564         struct CommandList *c;
6565         char *buff = NULL;
6566         u64 temp64;
6567         int rc = 0;
6568
6569         if (!argp)
6570                 return -EINVAL;
6571         if (!capable(CAP_SYS_RAWIO))
6572                 return -EPERM;
6573         if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
6574                 return -EFAULT;
6575         if ((iocommand.buf_size < 1) &&
6576             (iocommand.Request.Type.Direction != XFER_NONE)) {
6577                 return -EINVAL;
6578         }
6579         if (iocommand.buf_size > 0) {
6580                 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
6581                 if (buff == NULL)
6582                         return -ENOMEM;
6583                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
6584                         /* Copy the data into the buffer we created */
6585                         if (copy_from_user(buff, iocommand.buf,
6586                                 iocommand.buf_size)) {
6587                                 rc = -EFAULT;
6588                                 goto out_kfree;
6589                         }
6590                 } else {
6591                         memset(buff, 0, iocommand.buf_size);
6592                 }
6593         }
6594         c = cmd_alloc(h);
6595
6596         /* Fill in the command type */
6597         c->cmd_type = CMD_IOCTL_PEND;
6598         c->scsi_cmd = SCSI_CMD_BUSY;
6599         /* Fill in Command Header */
6600         c->Header.ReplyQueue = 0; /* unused in simple mode */
6601         if (iocommand.buf_size > 0) {   /* buffer to fill */
6602                 c->Header.SGList = 1;
6603                 c->Header.SGTotal = cpu_to_le16(1);
6604         } else  { /* no buffers to fill */
6605                 c->Header.SGList = 0;
6606                 c->Header.SGTotal = cpu_to_le16(0);
6607         }
6608         memcpy(&c->Header.LUN, &iocommand.LUN_info, sizeof(c->Header.LUN));
6609
6610         /* Fill in Request block */
6611         memcpy(&c->Request, &iocommand.Request,
6612                 sizeof(c->Request));
6613
6614         /* Fill in the scatter gather information */
6615         if (iocommand.buf_size > 0) {
6616                 temp64 = pci_map_single(h->pdev, buff,
6617                         iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
6618                 if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
6619                         c->SG[0].Addr = cpu_to_le64(0);
6620                         c->SG[0].Len = cpu_to_le32(0);
6621                         rc = -ENOMEM;
6622                         goto out;
6623                 }
6624                 c->SG[0].Addr = cpu_to_le64(temp64);
6625                 c->SG[0].Len = cpu_to_le32(iocommand.buf_size);
6626                 c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
6627         }
6628         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6629                                         NO_TIMEOUT);
6630         if (iocommand.buf_size > 0)
6631                 hpsa_pci_unmap(h->pdev, c, 1, PCI_DMA_BIDIRECTIONAL);
6632         check_ioctl_unit_attention(h, c);
6633         if (rc) {
6634                 rc = -EIO;
6635                 goto out;
6636         }
6637
6638         /* Copy the error information out */
6639         memcpy(&iocommand.error_info, c->err_info,
6640                 sizeof(iocommand.error_info));
6641         if (copy_to_user(argp, &iocommand, sizeof(iocommand))) {
6642                 rc = -EFAULT;
6643                 goto out;
6644         }
6645         if ((iocommand.Request.Type.Direction & XFER_READ) &&
6646                 iocommand.buf_size > 0) {
6647                 /* Copy the data out of the buffer we created */
6648                 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
6649                         rc = -EFAULT;
6650                         goto out;
6651                 }
6652         }
6653 out:
6654         cmd_free(h, c);
6655 out_kfree:
6656         kfree(buff);
6657         return rc;
6658 }
6659
6660 static int hpsa_big_passthru_ioctl(struct ctlr_info *h, void __user *argp)
6661 {
6662         BIG_IOCTL_Command_struct *ioc;
6663         struct CommandList *c;
6664         unsigned char **buff = NULL;
6665         int *buff_size = NULL;
6666         u64 temp64;
6667         BYTE sg_used = 0;
6668         int status = 0;
6669         u32 left;
6670         u32 sz;
6671         BYTE __user *data_ptr;
6672
6673         if (!argp)
6674                 return -EINVAL;
6675         if (!capable(CAP_SYS_RAWIO))
6676                 return -EPERM;
6677         ioc = (BIG_IOCTL_Command_struct *)
6678             kmalloc(sizeof(*ioc), GFP_KERNEL);
6679         if (!ioc) {
6680                 status = -ENOMEM;
6681                 goto cleanup1;
6682         }
6683         if (copy_from_user(ioc, argp, sizeof(*ioc))) {
6684                 status = -EFAULT;
6685                 goto cleanup1;
6686         }
6687         if ((ioc->buf_size < 1) &&
6688             (ioc->Request.Type.Direction != XFER_NONE)) {
6689                 status = -EINVAL;
6690                 goto cleanup1;
6691         }
6692         /* Check kmalloc limits  using all SGs */
6693         if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
6694                 status = -EINVAL;
6695                 goto cleanup1;
6696         }
6697         if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD) {
6698                 status = -EINVAL;
6699                 goto cleanup1;
6700         }
6701         buff = kzalloc(SG_ENTRIES_IN_CMD * sizeof(char *), GFP_KERNEL);
6702         if (!buff) {
6703                 status = -ENOMEM;
6704                 goto cleanup1;
6705         }
6706         buff_size = kmalloc(SG_ENTRIES_IN_CMD * sizeof(int), GFP_KERNEL);
6707         if (!buff_size) {
6708                 status = -ENOMEM;
6709                 goto cleanup1;
6710         }
6711         left = ioc->buf_size;
6712         data_ptr = ioc->buf;
6713         while (left) {
6714                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
6715                 buff_size[sg_used] = sz;
6716                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
6717                 if (buff[sg_used] == NULL) {
6718                         status = -ENOMEM;
6719                         goto cleanup1;
6720                 }
6721                 if (ioc->Request.Type.Direction & XFER_WRITE) {
6722                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6723                                 status = -EFAULT;
6724                                 goto cleanup1;
6725                         }
6726                 } else
6727                         memset(buff[sg_used], 0, sz);
6728                 left -= sz;
6729                 data_ptr += sz;
6730                 sg_used++;
6731         }
6732         c = cmd_alloc(h);
6733
6734         c->cmd_type = CMD_IOCTL_PEND;
6735         c->scsi_cmd = SCSI_CMD_BUSY;
6736         c->Header.ReplyQueue = 0;
6737         c->Header.SGList = (u8) sg_used;
6738         c->Header.SGTotal = cpu_to_le16(sg_used);
6739         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
6740         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
6741         if (ioc->buf_size > 0) {
6742                 int i;
6743                 for (i = 0; i < sg_used; i++) {
6744                         temp64 = pci_map_single(h->pdev, buff[i],
6745                                     buff_size[i], PCI_DMA_BIDIRECTIONAL);
6746                         if (dma_mapping_error(&h->pdev->dev,
6747                                                         (dma_addr_t) temp64)) {
6748                                 c->SG[i].Addr = cpu_to_le64(0);
6749                                 c->SG[i].Len = cpu_to_le32(0);
6750                                 hpsa_pci_unmap(h->pdev, c, i,
6751                                         PCI_DMA_BIDIRECTIONAL);
6752                                 status = -ENOMEM;
6753                                 goto cleanup0;
6754                         }
6755                         c->SG[i].Addr = cpu_to_le64(temp64);
6756                         c->SG[i].Len = cpu_to_le32(buff_size[i]);
6757                         c->SG[i].Ext = cpu_to_le32(0);
6758                 }
6759                 c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6760         }
6761         status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6762                                                 NO_TIMEOUT);
6763         if (sg_used)
6764                 hpsa_pci_unmap(h->pdev, c, sg_used, PCI_DMA_BIDIRECTIONAL);
6765         check_ioctl_unit_attention(h, c);
6766         if (status) {
6767                 status = -EIO;
6768                 goto cleanup0;
6769         }
6770
6771         /* Copy the error information out */
6772         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
6773         if (copy_to_user(argp, ioc, sizeof(*ioc))) {
6774                 status = -EFAULT;
6775                 goto cleanup0;
6776         }
6777         if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
6778                 int i;
6779
6780                 /* Copy the data out of the buffer we created */
6781                 BYTE __user *ptr = ioc->buf;
6782                 for (i = 0; i < sg_used; i++) {
6783                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
6784                                 status = -EFAULT;
6785                                 goto cleanup0;
6786                         }
6787                         ptr += buff_size[i];
6788                 }
6789         }
6790         status = 0;
6791 cleanup0:
6792         cmd_free(h, c);
6793 cleanup1:
6794         if (buff) {
6795                 int i;
6796
6797                 for (i = 0; i < sg_used; i++)
6798                         kfree(buff[i]);
6799                 kfree(buff);
6800         }
6801         kfree(buff_size);
6802         kfree(ioc);
6803         return status;
6804 }
6805
6806 static void check_ioctl_unit_attention(struct ctlr_info *h,
6807         struct CommandList *c)
6808 {
6809         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
6810                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
6811                 (void) check_for_unit_attention(h, c);
6812 }
6813
6814 /*
6815  * ioctl
6816  */
6817 static int hpsa_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
6818 {
6819         struct ctlr_info *h;
6820         void __user *argp = (void __user *)arg;
6821         int rc;
6822
6823         h = sdev_to_hba(dev);
6824
6825         switch (cmd) {
6826         case CCISS_DEREGDISK:
6827         case CCISS_REGNEWDISK:
6828         case CCISS_REGNEWD:
6829                 hpsa_scan_start(h->scsi_host);
6830                 return 0;
6831         case CCISS_GETPCIINFO:
6832                 return hpsa_getpciinfo_ioctl(h, argp);
6833         case CCISS_GETDRIVVER:
6834                 return hpsa_getdrivver_ioctl(h, argp);
6835         case CCISS_PASSTHRU:
6836                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6837                         return -EAGAIN;
6838                 rc = hpsa_passthru_ioctl(h, argp);
6839                 atomic_inc(&h->passthru_cmds_avail);
6840                 return rc;
6841         case CCISS_BIG_PASSTHRU:
6842                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6843                         return -EAGAIN;
6844                 rc = hpsa_big_passthru_ioctl(h, argp);
6845                 atomic_inc(&h->passthru_cmds_avail);
6846                 return rc;
6847         default:
6848                 return -ENOTTY;
6849         }
6850 }
6851
6852 static void hpsa_send_host_reset(struct ctlr_info *h, unsigned char *scsi3addr,
6853                                 u8 reset_type)
6854 {
6855         struct CommandList *c;
6856
6857         c = cmd_alloc(h);
6858
6859         /* fill_cmd can't fail here, no data buffer to map */
6860         (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6861                 RAID_CTLR_LUNID, TYPE_MSG);
6862         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
6863         c->waiting = NULL;
6864         enqueue_cmd_and_start_io(h, c);
6865         /* Don't wait for completion, the reset won't complete.  Don't free
6866          * the command either.  This is the last command we will send before
6867          * re-initializing everything, so it doesn't matter and won't leak.
6868          */
6869         return;
6870 }
6871
6872 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6873         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6874         int cmd_type)
6875 {
6876         int pci_dir = XFER_NONE;
6877         u64 tag; /* for commands to be aborted */
6878
6879         c->cmd_type = CMD_IOCTL_PEND;
6880         c->scsi_cmd = SCSI_CMD_BUSY;
6881         c->Header.ReplyQueue = 0;
6882         if (buff != NULL && size > 0) {
6883                 c->Header.SGList = 1;
6884                 c->Header.SGTotal = cpu_to_le16(1);
6885         } else {
6886                 c->Header.SGList = 0;
6887                 c->Header.SGTotal = cpu_to_le16(0);
6888         }
6889         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
6890
6891         if (cmd_type == TYPE_CMD) {
6892                 switch (cmd) {
6893                 case HPSA_INQUIRY:
6894                         /* are we trying to read a vital product page */
6895                         if (page_code & VPD_PAGE) {
6896                                 c->Request.CDB[1] = 0x01;
6897                                 c->Request.CDB[2] = (page_code & 0xff);
6898                         }
6899                         c->Request.CDBLen = 6;
6900                         c->Request.type_attr_dir =
6901                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6902                         c->Request.Timeout = 0;
6903                         c->Request.CDB[0] = HPSA_INQUIRY;
6904                         c->Request.CDB[4] = size & 0xFF;
6905                         break;
6906                 case HPSA_REPORT_LOG:
6907                 case HPSA_REPORT_PHYS:
6908                         /* Talking to controller so It's a physical command
6909                            mode = 00 target = 0.  Nothing to write.
6910                          */
6911                         c->Request.CDBLen = 12;
6912                         c->Request.type_attr_dir =
6913                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6914                         c->Request.Timeout = 0;
6915                         c->Request.CDB[0] = cmd;
6916                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6917                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6918                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6919                         c->Request.CDB[9] = size & 0xFF;
6920                         break;
6921                 case BMIC_SENSE_DIAG_OPTIONS:
6922                         c->Request.CDBLen = 16;
6923                         c->Request.type_attr_dir =
6924                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6925                         c->Request.Timeout = 0;
6926                         /* Spec says this should be BMIC_WRITE */
6927                         c->Request.CDB[0] = BMIC_READ;
6928                         c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
6929                         break;
6930                 case BMIC_SET_DIAG_OPTIONS:
6931                         c->Request.CDBLen = 16;
6932                         c->Request.type_attr_dir =
6933                                         TYPE_ATTR_DIR(cmd_type,
6934                                                 ATTR_SIMPLE, XFER_WRITE);
6935                         c->Request.Timeout = 0;
6936                         c->Request.CDB[0] = BMIC_WRITE;
6937                         c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
6938                         break;
6939                 case HPSA_CACHE_FLUSH:
6940                         c->Request.CDBLen = 12;
6941                         c->Request.type_attr_dir =
6942                                         TYPE_ATTR_DIR(cmd_type,
6943                                                 ATTR_SIMPLE, XFER_WRITE);
6944                         c->Request.Timeout = 0;
6945                         c->Request.CDB[0] = BMIC_WRITE;
6946                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6947                         c->Request.CDB[7] = (size >> 8) & 0xFF;
6948                         c->Request.CDB[8] = size & 0xFF;
6949                         break;
6950                 case TEST_UNIT_READY:
6951                         c->Request.CDBLen = 6;
6952                         c->Request.type_attr_dir =
6953                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6954                         c->Request.Timeout = 0;
6955                         break;
6956                 case HPSA_GET_RAID_MAP:
6957                         c->Request.CDBLen = 12;
6958                         c->Request.type_attr_dir =
6959                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6960                         c->Request.Timeout = 0;
6961                         c->Request.CDB[0] = HPSA_CISS_READ;
6962                         c->Request.CDB[1] = cmd;
6963                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6964                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6965                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6966                         c->Request.CDB[9] = size & 0xFF;
6967                         break;
6968                 case BMIC_SENSE_CONTROLLER_PARAMETERS:
6969                         c->Request.CDBLen = 10;
6970                         c->Request.type_attr_dir =
6971                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6972                         c->Request.Timeout = 0;
6973                         c->Request.CDB[0] = BMIC_READ;
6974                         c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
6975                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6976                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6977                         break;
6978                 case BMIC_IDENTIFY_PHYSICAL_DEVICE:
6979                         c->Request.CDBLen = 10;
6980                         c->Request.type_attr_dir =
6981                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6982                         c->Request.Timeout = 0;
6983                         c->Request.CDB[0] = BMIC_READ;
6984                         c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
6985                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6986                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6987                         break;
6988                 case BMIC_SENSE_SUBSYSTEM_INFORMATION:
6989                         c->Request.CDBLen = 10;
6990                         c->Request.type_attr_dir =
6991                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6992                         c->Request.Timeout = 0;
6993                         c->Request.CDB[0] = BMIC_READ;
6994                         c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
6995                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6996                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6997                         break;
6998                 case BMIC_SENSE_STORAGE_BOX_PARAMS:
6999                         c->Request.CDBLen = 10;
7000                         c->Request.type_attr_dir =
7001                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7002                         c->Request.Timeout = 0;
7003                         c->Request.CDB[0] = BMIC_READ;
7004                         c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
7005                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7006                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7007                         break;
7008                 case BMIC_IDENTIFY_CONTROLLER:
7009                         c->Request.CDBLen = 10;
7010                         c->Request.type_attr_dir =
7011                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
7012                         c->Request.Timeout = 0;
7013                         c->Request.CDB[0] = BMIC_READ;
7014                         c->Request.CDB[1] = 0;
7015                         c->Request.CDB[2] = 0;
7016                         c->Request.CDB[3] = 0;
7017                         c->Request.CDB[4] = 0;
7018                         c->Request.CDB[5] = 0;
7019                         c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
7020                         c->Request.CDB[7] = (size >> 16) & 0xFF;
7021                         c->Request.CDB[8] = (size >> 8) & 0XFF;
7022                         c->Request.CDB[9] = 0;
7023                         break;
7024                 default:
7025                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
7026                         BUG();
7027                         return -1;
7028                 }
7029         } else if (cmd_type == TYPE_MSG) {
7030                 switch (cmd) {
7031
7032                 case  HPSA_PHYS_TARGET_RESET:
7033                         c->Request.CDBLen = 16;
7034                         c->Request.type_attr_dir =
7035                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
7036                         c->Request.Timeout = 0; /* Don't time out */
7037                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7038                         c->Request.CDB[0] = HPSA_RESET;
7039                         c->Request.CDB[1] = HPSA_TARGET_RESET_TYPE;
7040                         /* Physical target reset needs no control bytes 4-7*/
7041                         c->Request.CDB[4] = 0x00;
7042                         c->Request.CDB[5] = 0x00;
7043                         c->Request.CDB[6] = 0x00;
7044                         c->Request.CDB[7] = 0x00;
7045                         break;
7046                 case  HPSA_DEVICE_RESET_MSG:
7047                         c->Request.CDBLen = 16;
7048                         c->Request.type_attr_dir =
7049                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
7050                         c->Request.Timeout = 0; /* Don't time out */
7051                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7052                         c->Request.CDB[0] =  cmd;
7053                         c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
7054                         /* If bytes 4-7 are zero, it means reset the */
7055                         /* LunID device */
7056                         c->Request.CDB[4] = 0x00;
7057                         c->Request.CDB[5] = 0x00;
7058                         c->Request.CDB[6] = 0x00;
7059                         c->Request.CDB[7] = 0x00;
7060                         break;
7061                 case  HPSA_ABORT_MSG:
7062                         memcpy(&tag, buff, sizeof(tag));
7063                         dev_dbg(&h->pdev->dev,
7064                                 "Abort Tag:0x%016llx using rqst Tag:0x%016llx",
7065                                 tag, c->Header.tag);
7066                         c->Request.CDBLen = 16;
7067                         c->Request.type_attr_dir =
7068                                         TYPE_ATTR_DIR(cmd_type,
7069                                                 ATTR_SIMPLE, XFER_WRITE);
7070                         c->Request.Timeout = 0; /* Don't time out */
7071                         c->Request.CDB[0] = HPSA_TASK_MANAGEMENT;
7072                         c->Request.CDB[1] = HPSA_TMF_ABORT_TASK;
7073                         c->Request.CDB[2] = 0x00; /* reserved */
7074                         c->Request.CDB[3] = 0x00; /* reserved */
7075                         /* Tag to abort goes in CDB[4]-CDB[11] */
7076                         memcpy(&c->Request.CDB[4], &tag, sizeof(tag));
7077                         c->Request.CDB[12] = 0x00; /* reserved */
7078                         c->Request.CDB[13] = 0x00; /* reserved */
7079                         c->Request.CDB[14] = 0x00; /* reserved */
7080                         c->Request.CDB[15] = 0x00; /* reserved */
7081                 break;
7082                 default:
7083                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
7084                                 cmd);
7085                         BUG();
7086                 }
7087         } else {
7088                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
7089                 BUG();
7090         }
7091
7092         switch (GET_DIR(c->Request.type_attr_dir)) {
7093         case XFER_READ:
7094                 pci_dir = PCI_DMA_FROMDEVICE;
7095                 break;
7096         case XFER_WRITE:
7097                 pci_dir = PCI_DMA_TODEVICE;
7098                 break;
7099         case XFER_NONE:
7100                 pci_dir = PCI_DMA_NONE;
7101                 break;
7102         default:
7103                 pci_dir = PCI_DMA_BIDIRECTIONAL;
7104         }
7105         if (hpsa_map_one(h->pdev, c, buff, size, pci_dir))
7106                 return -1;
7107         return 0;
7108 }
7109
7110 /*
7111  * Map (physical) PCI mem into (virtual) kernel space
7112  */
7113 static void __iomem *remap_pci_mem(ulong base, ulong size)
7114 {
7115         ulong page_base = ((ulong) base) & PAGE_MASK;
7116         ulong page_offs = ((ulong) base) - page_base;
7117         void __iomem *page_remapped = ioremap_nocache(page_base,
7118                 page_offs + size);
7119
7120         return page_remapped ? (page_remapped + page_offs) : NULL;
7121 }
7122
7123 static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
7124 {
7125         return h->access.command_completed(h, q);
7126 }
7127
7128 static inline bool interrupt_pending(struct ctlr_info *h)
7129 {
7130         return h->access.intr_pending(h);
7131 }
7132
7133 static inline long interrupt_not_for_us(struct ctlr_info *h)
7134 {
7135         return (h->access.intr_pending(h) == 0) ||
7136                 (h->interrupts_enabled == 0);
7137 }
7138
7139 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
7140         u32 raw_tag)
7141 {
7142         if (unlikely(tag_index >= h->nr_cmds)) {
7143                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
7144                 return 1;
7145         }
7146         return 0;
7147 }
7148
7149 static inline void finish_cmd(struct CommandList *c)
7150 {
7151         dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
7152         if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
7153                         || c->cmd_type == CMD_IOACCEL2))
7154                 complete_scsi_command(c);
7155         else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
7156                 complete(c->waiting);
7157 }
7158
7159 /* process completion of an indexed ("direct lookup") command */
7160 static inline void process_indexed_cmd(struct ctlr_info *h,
7161         u32 raw_tag)
7162 {
7163         u32 tag_index;
7164         struct CommandList *c;
7165
7166         tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
7167         if (!bad_tag(h, tag_index, raw_tag)) {
7168                 c = h->cmd_pool + tag_index;
7169                 finish_cmd(c);
7170         }
7171 }
7172
7173 /* Some controllers, like p400, will give us one interrupt
7174  * after a soft reset, even if we turned interrupts off.
7175  * Only need to check for this in the hpsa_xxx_discard_completions
7176  * functions.
7177  */
7178 static int ignore_bogus_interrupt(struct ctlr_info *h)
7179 {
7180         if (likely(!reset_devices))
7181                 return 0;
7182
7183         if (likely(h->interrupts_enabled))
7184                 return 0;
7185
7186         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
7187                 "(known firmware bug.)  Ignoring.\n");
7188
7189         return 1;
7190 }
7191
7192 /*
7193  * Convert &h->q[x] (passed to interrupt handlers) back to h.
7194  * Relies on (h-q[x] == x) being true for x such that
7195  * 0 <= x < MAX_REPLY_QUEUES.
7196  */
7197 static struct ctlr_info *queue_to_hba(u8 *queue)
7198 {
7199         return container_of((queue - *queue), struct ctlr_info, q[0]);
7200 }
7201
7202 static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
7203 {
7204         struct ctlr_info *h = queue_to_hba(queue);
7205         u8 q = *(u8 *) queue;
7206         u32 raw_tag;
7207
7208         if (ignore_bogus_interrupt(h))
7209                 return IRQ_NONE;
7210
7211         if (interrupt_not_for_us(h))
7212                 return IRQ_NONE;
7213         h->last_intr_timestamp = get_jiffies_64();
7214         while (interrupt_pending(h)) {
7215                 raw_tag = get_next_completion(h, q);
7216                 while (raw_tag != FIFO_EMPTY)
7217                         raw_tag = next_command(h, q);
7218         }
7219         return IRQ_HANDLED;
7220 }
7221
7222 static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
7223 {
7224         struct ctlr_info *h = queue_to_hba(queue);
7225         u32 raw_tag;
7226         u8 q = *(u8 *) queue;
7227
7228         if (ignore_bogus_interrupt(h))
7229                 return IRQ_NONE;
7230
7231         h->last_intr_timestamp = get_jiffies_64();
7232         raw_tag = get_next_completion(h, q);
7233         while (raw_tag != FIFO_EMPTY)
7234                 raw_tag = next_command(h, q);
7235         return IRQ_HANDLED;
7236 }
7237
7238 static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
7239 {
7240         struct ctlr_info *h = queue_to_hba((u8 *) queue);
7241         u32 raw_tag;
7242         u8 q = *(u8 *) queue;
7243
7244         if (interrupt_not_for_us(h))
7245                 return IRQ_NONE;
7246         h->last_intr_timestamp = get_jiffies_64();
7247         while (interrupt_pending(h)) {
7248                 raw_tag = get_next_completion(h, q);
7249                 while (raw_tag != FIFO_EMPTY) {
7250                         process_indexed_cmd(h, raw_tag);
7251                         raw_tag = next_command(h, q);
7252                 }
7253         }
7254         return IRQ_HANDLED;
7255 }
7256
7257 static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
7258 {
7259         struct ctlr_info *h = queue_to_hba(queue);
7260         u32 raw_tag;
7261         u8 q = *(u8 *) queue;
7262
7263         h->last_intr_timestamp = get_jiffies_64();
7264         raw_tag = get_next_completion(h, q);
7265         while (raw_tag != FIFO_EMPTY) {
7266                 process_indexed_cmd(h, raw_tag);
7267                 raw_tag = next_command(h, q);
7268         }
7269         return IRQ_HANDLED;
7270 }
7271
7272 /* Send a message CDB to the firmware. Careful, this only works
7273  * in simple mode, not performant mode due to the tag lookup.
7274  * We only ever use this immediately after a controller reset.
7275  */
7276 static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
7277                         unsigned char type)
7278 {
7279         struct Command {
7280                 struct CommandListHeader CommandHeader;
7281                 struct RequestBlock Request;
7282                 struct ErrDescriptor ErrorDescriptor;
7283         };
7284         struct Command *cmd;
7285         static const size_t cmd_sz = sizeof(*cmd) +
7286                                         sizeof(cmd->ErrorDescriptor);
7287         dma_addr_t paddr64;
7288         __le32 paddr32;
7289         u32 tag;
7290         void __iomem *vaddr;
7291         int i, err;
7292
7293         vaddr = pci_ioremap_bar(pdev, 0);
7294         if (vaddr == NULL)
7295                 return -ENOMEM;
7296
7297         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
7298          * CCISS commands, so they must be allocated from the lower 4GiB of
7299          * memory.
7300          */
7301         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
7302         if (err) {
7303                 iounmap(vaddr);
7304                 return err;
7305         }
7306
7307         cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
7308         if (cmd == NULL) {
7309                 iounmap(vaddr);
7310                 return -ENOMEM;
7311         }
7312
7313         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
7314          * although there's no guarantee, we assume that the address is at
7315          * least 4-byte aligned (most likely, it's page-aligned).
7316          */
7317         paddr32 = cpu_to_le32(paddr64);
7318
7319         cmd->CommandHeader.ReplyQueue = 0;
7320         cmd->CommandHeader.SGList = 0;
7321         cmd->CommandHeader.SGTotal = cpu_to_le16(0);
7322         cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7323         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
7324
7325         cmd->Request.CDBLen = 16;
7326         cmd->Request.type_attr_dir =
7327                         TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7328         cmd->Request.Timeout = 0; /* Don't time out */
7329         cmd->Request.CDB[0] = opcode;
7330         cmd->Request.CDB[1] = type;
7331         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
7332         cmd->ErrorDescriptor.Addr =
7333                         cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7334         cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7335
7336         writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7337
7338         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
7339                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
7340                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7341                         break;
7342                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
7343         }
7344
7345         iounmap(vaddr);
7346
7347         /* we leak the DMA buffer here ... no choice since the controller could
7348          *  still complete the command.
7349          */
7350         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
7351                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
7352                         opcode, type);
7353                 return -ETIMEDOUT;
7354         }
7355
7356         pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
7357
7358         if (tag & HPSA_ERROR_BIT) {
7359                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
7360                         opcode, type);
7361                 return -EIO;
7362         }
7363
7364         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
7365                 opcode, type);
7366         return 0;
7367 }
7368
7369 #define hpsa_noop(p) hpsa_message(p, 3, 0)
7370
7371 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
7372         void __iomem *vaddr, u32 use_doorbell)
7373 {
7374
7375         if (use_doorbell) {
7376                 /* For everything after the P600, the PCI power state method
7377                  * of resetting the controller doesn't work, so we have this
7378                  * other way using the doorbell register.
7379                  */
7380                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
7381                 writel(use_doorbell, vaddr + SA5_DOORBELL);
7382
7383                 /* PMC hardware guys tell us we need a 10 second delay after
7384                  * doorbell reset and before any attempt to talk to the board
7385                  * at all to ensure that this actually works and doesn't fall
7386                  * over in some weird corner cases.
7387                  */
7388                 msleep(10000);
7389         } else { /* Try to do it the PCI power state way */
7390
7391                 /* Quoting from the Open CISS Specification: "The Power
7392                  * Management Control/Status Register (CSR) controls the power
7393                  * state of the device.  The normal operating state is D0,
7394                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
7395                  * the controller, place the interface device in D3 then to D0,
7396                  * this causes a secondary PCI reset which will reset the
7397                  * controller." */
7398
7399                 int rc = 0;
7400
7401                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7402
7403                 /* enter the D3hot power management state */
7404                 rc = pci_set_power_state(pdev, PCI_D3hot);
7405                 if (rc)
7406                         return rc;
7407
7408                 msleep(500);
7409
7410                 /* enter the D0 power management state */
7411                 rc = pci_set_power_state(pdev, PCI_D0);
7412                 if (rc)
7413                         return rc;
7414
7415                 /*
7416                  * The P600 requires a small delay when changing states.
7417                  * Otherwise we may think the board did not reset and we bail.
7418                  * This for kdump only and is particular to the P600.
7419                  */
7420                 msleep(500);
7421         }
7422         return 0;
7423 }
7424
7425 static void init_driver_version(char *driver_version, int len)
7426 {
7427         memset(driver_version, 0, len);
7428         strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7429 }
7430
7431 static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7432 {
7433         char *driver_version;
7434         int i, size = sizeof(cfgtable->driver_version);
7435
7436         driver_version = kmalloc(size, GFP_KERNEL);
7437         if (!driver_version)
7438                 return -ENOMEM;
7439
7440         init_driver_version(driver_version, size);
7441         for (i = 0; i < size; i++)
7442                 writeb(driver_version[i], &cfgtable->driver_version[i]);
7443         kfree(driver_version);
7444         return 0;
7445 }
7446
7447 static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
7448                                           unsigned char *driver_ver)
7449 {
7450         int i;
7451
7452         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
7453                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
7454 }
7455
7456 static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7457 {
7458
7459         char *driver_ver, *old_driver_ver;
7460         int rc, size = sizeof(cfgtable->driver_version);
7461
7462         old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
7463         if (!old_driver_ver)
7464                 return -ENOMEM;
7465         driver_ver = old_driver_ver + size;
7466
7467         /* After a reset, the 32 bytes of "driver version" in the cfgtable
7468          * should have been changed, otherwise we know the reset failed.
7469          */
7470         init_driver_version(old_driver_ver, size);
7471         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
7472         rc = !memcmp(driver_ver, old_driver_ver, size);
7473         kfree(old_driver_ver);
7474         return rc;
7475 }
7476 /* This does a hard reset of the controller using PCI power management
7477  * states or the using the doorbell register.
7478  */
7479 static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7480 {
7481         u64 cfg_offset;
7482         u32 cfg_base_addr;
7483         u64 cfg_base_addr_index;
7484         void __iomem *vaddr;
7485         unsigned long paddr;
7486         u32 misc_fw_support;
7487         int rc;
7488         struct CfgTable __iomem *cfgtable;
7489         u32 use_doorbell;
7490         u16 command_register;
7491
7492         /* For controllers as old as the P600, this is very nearly
7493          * the same thing as
7494          *
7495          * pci_save_state(pci_dev);
7496          * pci_set_power_state(pci_dev, PCI_D3hot);
7497          * pci_set_power_state(pci_dev, PCI_D0);
7498          * pci_restore_state(pci_dev);
7499          *
7500          * For controllers newer than the P600, the pci power state
7501          * method of resetting doesn't work so we have another way
7502          * using the doorbell register.
7503          */
7504
7505         if (!ctlr_is_resettable(board_id)) {
7506                 dev_warn(&pdev->dev, "Controller not resettable\n");
7507                 return -ENODEV;
7508         }
7509
7510         /* if controller is soft- but not hard resettable... */
7511         if (!ctlr_is_hard_resettable(board_id))
7512                 return -ENOTSUPP; /* try soft reset later. */
7513
7514         /* Save the PCI command register */
7515         pci_read_config_word(pdev, 4, &command_register);
7516         pci_save_state(pdev);
7517
7518         /* find the first memory BAR, so we can find the cfg table */
7519         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
7520         if (rc)
7521                 return rc;
7522         vaddr = remap_pci_mem(paddr, 0x250);
7523         if (!vaddr)
7524                 return -ENOMEM;
7525
7526         /* find cfgtable in order to check if reset via doorbell is supported */
7527         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
7528                                         &cfg_base_addr_index, &cfg_offset);
7529         if (rc)
7530                 goto unmap_vaddr;
7531         cfgtable = remap_pci_mem(pci_resource_start(pdev,
7532                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
7533         if (!cfgtable) {
7534                 rc = -ENOMEM;
7535                 goto unmap_vaddr;
7536         }
7537         rc = write_driver_ver_to_cfgtable(cfgtable);
7538         if (rc)
7539                 goto unmap_cfgtable;
7540
7541         /* If reset via doorbell register is supported, use that.
7542          * There are two such methods.  Favor the newest method.
7543          */
7544         misc_fw_support = readl(&cfgtable->misc_fw_support);
7545         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
7546         if (use_doorbell) {
7547                 use_doorbell = DOORBELL_CTLR_RESET2;
7548         } else {
7549                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
7550                 if (use_doorbell) {
7551                         dev_warn(&pdev->dev,
7552                                 "Soft reset not supported. Firmware update is required.\n");
7553                         rc = -ENOTSUPP; /* try soft reset */
7554                         goto unmap_cfgtable;
7555                 }
7556         }
7557
7558         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
7559         if (rc)
7560                 goto unmap_cfgtable;
7561
7562         pci_restore_state(pdev);
7563         pci_write_config_word(pdev, 4, command_register);
7564
7565         /* Some devices (notably the HP Smart Array 5i Controller)
7566            need a little pause here */
7567         msleep(HPSA_POST_RESET_PAUSE_MSECS);
7568
7569         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
7570         if (rc) {
7571                 dev_warn(&pdev->dev,
7572                         "Failed waiting for board to become ready after hard reset\n");
7573                 goto unmap_cfgtable;
7574         }
7575
7576         rc = controller_reset_failed(vaddr);
7577         if (rc < 0)
7578                 goto unmap_cfgtable;
7579         if (rc) {
7580                 dev_warn(&pdev->dev, "Unable to successfully reset "
7581                         "controller. Will try soft reset.\n");
7582                 rc = -ENOTSUPP;
7583         } else {
7584                 dev_info(&pdev->dev, "board ready after hard reset.\n");
7585         }
7586
7587 unmap_cfgtable:
7588         iounmap(cfgtable);
7589
7590 unmap_vaddr:
7591         iounmap(vaddr);
7592         return rc;
7593 }
7594
7595 /*
7596  *  We cannot read the structure directly, for portability we must use
7597  *   the io functions.
7598  *   This is for debug only.
7599  */
7600 static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7601 {
7602 #ifdef HPSA_DEBUG
7603         int i;
7604         char temp_name[17];
7605
7606         dev_info(dev, "Controller Configuration information\n");
7607         dev_info(dev, "------------------------------------\n");
7608         for (i = 0; i < 4; i++)
7609                 temp_name[i] = readb(&(tb->Signature[i]));
7610         temp_name[4] = '\0';
7611         dev_info(dev, "   Signature = %s\n", temp_name);
7612         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
7613         dev_info(dev, "   Transport methods supported = 0x%x\n",
7614                readl(&(tb->TransportSupport)));
7615         dev_info(dev, "   Transport methods active = 0x%x\n",
7616                readl(&(tb->TransportActive)));
7617         dev_info(dev, "   Requested transport Method = 0x%x\n",
7618                readl(&(tb->HostWrite.TransportRequest)));
7619         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
7620                readl(&(tb->HostWrite.CoalIntDelay)));
7621         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
7622                readl(&(tb->HostWrite.CoalIntCount)));
7623         dev_info(dev, "   Max outstanding commands = %d\n",
7624                readl(&(tb->CmdsOutMax)));
7625         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
7626         for (i = 0; i < 16; i++)
7627                 temp_name[i] = readb(&(tb->ServerName[i]));
7628         temp_name[16] = '\0';
7629         dev_info(dev, "   Server Name = %s\n", temp_name);
7630         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
7631                 readl(&(tb->HeartBeat)));
7632 #endif                          /* HPSA_DEBUG */
7633 }
7634
7635 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
7636 {
7637         int i, offset, mem_type, bar_type;
7638
7639         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
7640                 return 0;
7641         offset = 0;
7642         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
7643                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
7644                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
7645                         offset += 4;
7646                 else {
7647                         mem_type = pci_resource_flags(pdev, i) &
7648                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
7649                         switch (mem_type) {
7650                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
7651                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
7652                                 offset += 4;    /* 32 bit */
7653                                 break;
7654                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
7655                                 offset += 8;
7656                                 break;
7657                         default:        /* reserved in PCI 2.2 */
7658                                 dev_warn(&pdev->dev,
7659                                        "base address is invalid\n");
7660                                 return -1;
7661                                 break;
7662                         }
7663                 }
7664                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
7665                         return i + 1;
7666         }
7667         return -1;
7668 }
7669
7670 static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
7671 {
7672         if (h->msix_vector) {
7673                 if (h->pdev->msix_enabled)
7674                         pci_disable_msix(h->pdev);
7675                 h->msix_vector = 0;
7676         } else if (h->msi_vector) {
7677                 if (h->pdev->msi_enabled)
7678                         pci_disable_msi(h->pdev);
7679                 h->msi_vector = 0;
7680         }
7681 }
7682
7683 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
7684  * controllers that are capable. If not, we use legacy INTx mode.
7685  */
7686 static void hpsa_interrupt_mode(struct ctlr_info *h)
7687 {
7688 #ifdef CONFIG_PCI_MSI
7689         int err, i;
7690         struct msix_entry hpsa_msix_entries[MAX_REPLY_QUEUES];
7691
7692         for (i = 0; i < MAX_REPLY_QUEUES; i++) {
7693                 hpsa_msix_entries[i].vector = 0;
7694                 hpsa_msix_entries[i].entry = i;
7695         }
7696
7697         /* Some boards advertise MSI but don't really support it */
7698         if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
7699             (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
7700                 goto default_int_mode;
7701         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
7702                 dev_info(&h->pdev->dev, "MSI-X capable controller\n");
7703                 h->msix_vector = MAX_REPLY_QUEUES;
7704                 if (h->msix_vector > num_online_cpus())
7705                         h->msix_vector = num_online_cpus();
7706                 err = pci_enable_msix_range(h->pdev, hpsa_msix_entries,
7707                                             1, h->msix_vector);
7708                 if (err < 0) {
7709                         dev_warn(&h->pdev->dev, "MSI-X init failed %d\n", err);
7710                         h->msix_vector = 0;
7711                         goto single_msi_mode;
7712                 } else if (err < h->msix_vector) {
7713                         dev_warn(&h->pdev->dev, "only %d MSI-X vectors "
7714                                "available\n", err);
7715                 }
7716                 h->msix_vector = err;
7717                 for (i = 0; i < h->msix_vector; i++)
7718                         h->intr[i] = hpsa_msix_entries[i].vector;
7719                 return;
7720         }
7721 single_msi_mode:
7722         if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
7723                 dev_info(&h->pdev->dev, "MSI capable controller\n");
7724                 if (!pci_enable_msi(h->pdev))
7725                         h->msi_vector = 1;
7726                 else
7727                         dev_warn(&h->pdev->dev, "MSI init failed\n");
7728         }
7729 default_int_mode:
7730 #endif                          /* CONFIG_PCI_MSI */
7731         /* if we get here we're going to use the default interrupt mode */
7732         h->intr[h->intr_mode] = h->pdev->irq;
7733 }
7734
7735 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
7736 {
7737         int i;
7738         u32 subsystem_vendor_id, subsystem_device_id;
7739
7740         subsystem_vendor_id = pdev->subsystem_vendor;
7741         subsystem_device_id = pdev->subsystem_device;
7742         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
7743                     subsystem_vendor_id;
7744
7745         for (i = 0; i < ARRAY_SIZE(products); i++)
7746                 if (*board_id == products[i].board_id)
7747                         return i;
7748
7749         if ((subsystem_vendor_id != PCI_VENDOR_ID_HP &&
7750                 subsystem_vendor_id != PCI_VENDOR_ID_COMPAQ) ||
7751                 !hpsa_allow_any) {
7752                 dev_warn(&pdev->dev, "unrecognized board ID: "
7753                         "0x%08x, ignoring.\n", *board_id);
7754                         return -ENODEV;
7755         }
7756         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
7757 }
7758
7759 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
7760                                     unsigned long *memory_bar)
7761 {
7762         int i;
7763
7764         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7765                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7766                         /* addressing mode bits already removed */
7767                         *memory_bar = pci_resource_start(pdev, i);
7768                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7769                                 *memory_bar);
7770                         return 0;
7771                 }
7772         dev_warn(&pdev->dev, "no memory BAR found\n");
7773         return -ENODEV;
7774 }
7775
7776 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
7777                                      int wait_for_ready)
7778 {
7779         int i, iterations;
7780         u32 scratchpad;
7781         if (wait_for_ready)
7782                 iterations = HPSA_BOARD_READY_ITERATIONS;
7783         else
7784                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7785
7786         for (i = 0; i < iterations; i++) {
7787                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
7788                 if (wait_for_ready) {
7789                         if (scratchpad == HPSA_FIRMWARE_READY)
7790                                 return 0;
7791                 } else {
7792                         if (scratchpad != HPSA_FIRMWARE_READY)
7793                                 return 0;
7794                 }
7795                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
7796         }
7797         dev_warn(&pdev->dev, "board not ready, timed out.\n");
7798         return -ENODEV;
7799 }
7800
7801 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
7802                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
7803                                u64 *cfg_offset)
7804 {
7805         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
7806         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
7807         *cfg_base_addr &= (u32) 0x0000ffff;
7808         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
7809         if (*cfg_base_addr_index == -1) {
7810                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
7811                 return -ENODEV;
7812         }
7813         return 0;
7814 }
7815
7816 static void hpsa_free_cfgtables(struct ctlr_info *h)
7817 {
7818         if (h->transtable) {
7819                 iounmap(h->transtable);
7820                 h->transtable = NULL;
7821         }
7822         if (h->cfgtable) {
7823                 iounmap(h->cfgtable);
7824                 h->cfgtable = NULL;
7825         }
7826 }
7827
7828 /* Find and map CISS config table and transfer table
7829 + * several items must be unmapped (freed) later
7830 + * */
7831 static int hpsa_find_cfgtables(struct ctlr_info *h)
7832 {
7833         u64 cfg_offset;
7834         u32 cfg_base_addr;
7835         u64 cfg_base_addr_index;
7836         u32 trans_offset;
7837         int rc;
7838
7839         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
7840                 &cfg_base_addr_index, &cfg_offset);
7841         if (rc)
7842                 return rc;
7843         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7844                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7845         if (!h->cfgtable) {
7846                 dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7847                 return -ENOMEM;
7848         }
7849         rc = write_driver_ver_to_cfgtable(h->cfgtable);
7850         if (rc)
7851                 return rc;
7852         /* Find performant mode table. */
7853         trans_offset = readl(&h->cfgtable->TransMethodOffset);
7854         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
7855                                 cfg_base_addr_index)+cfg_offset+trans_offset,
7856                                 sizeof(*h->transtable));
7857         if (!h->transtable) {
7858                 dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
7859                 hpsa_free_cfgtables(h);
7860                 return -ENOMEM;
7861         }
7862         return 0;
7863 }
7864
7865 static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7866 {
7867 #define MIN_MAX_COMMANDS 16
7868         BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);
7869
7870         h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7871
7872         /* Limit commands in memory limited kdump scenario. */
7873         if (reset_devices && h->max_commands > 32)
7874                 h->max_commands = 32;
7875
7876         if (h->max_commands < MIN_MAX_COMMANDS) {
7877                 dev_warn(&h->pdev->dev,
7878                         "Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
7879                         h->max_commands,
7880                         MIN_MAX_COMMANDS);
7881                 h->max_commands = MIN_MAX_COMMANDS;
7882         }
7883 }
7884
7885 /* If the controller reports that the total max sg entries is greater than 512,
7886  * then we know that chained SG blocks work.  (Original smart arrays did not
7887  * support chained SG blocks and would return zero for max sg entries.)
7888  */
7889 static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
7890 {
7891         return h->maxsgentries > 512;
7892 }
7893
7894 /* Interrogate the hardware for some limits:
7895  * max commands, max SG elements without chaining, and with chaining,
7896  * SG chain block size, etc.
7897  */
7898 static void hpsa_find_board_params(struct ctlr_info *h)
7899 {
7900         hpsa_get_max_perf_mode_cmds(h);
7901         h->nr_cmds = h->max_commands;
7902         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7903         h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7904         if (hpsa_supports_chained_sg_blocks(h)) {
7905                 /* Limit in-command s/g elements to 32 save dma'able memory. */
7906                 h->max_cmd_sg_entries = 32;
7907                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7908                 h->maxsgentries--; /* save one for chain pointer */
7909         } else {
7910                 /*
7911                  * Original smart arrays supported at most 31 s/g entries
7912                  * embedded inline in the command (trying to use more
7913                  * would lock up the controller)
7914                  */
7915                 h->max_cmd_sg_entries = 31;
7916                 h->maxsgentries = 31; /* default to traditional values */
7917                 h->chainsize = 0;
7918         }
7919
7920         /* Find out what task management functions are supported and cache */
7921         h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7922         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
7923                 dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
7924         if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
7925                 dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
7926         if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
7927                 dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7928 }
7929
7930 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
7931 {
7932         if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7933                 dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7934                 return false;
7935         }
7936         return true;
7937 }
7938
7939 static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7940 {
7941         u32 driver_support;
7942
7943         driver_support = readl(&(h->cfgtable->driver_support));
7944         /* Need to enable prefetch in the SCSI core for 6400 in x86 */
7945 #ifdef CONFIG_X86
7946         driver_support |= ENABLE_SCSI_PREFETCH;
7947 #endif
7948         driver_support |= ENABLE_UNIT_ATTN;
7949         writel(driver_support, &(h->cfgtable->driver_support));
7950 }
7951
7952 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
7953  * in a prefetch beyond physical memory.
7954  */
7955 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
7956 {
7957         u32 dma_prefetch;
7958
7959         if (h->board_id != 0x3225103C)
7960                 return;
7961         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
7962         dma_prefetch |= 0x8000;
7963         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
7964 }
7965
7966 static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7967 {
7968         int i;
7969         u32 doorbell_value;
7970         unsigned long flags;
7971         /* wait until the clear_event_notify bit 6 is cleared by controller. */
7972         for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7973                 spin_lock_irqsave(&h->lock, flags);
7974                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7975                 spin_unlock_irqrestore(&h->lock, flags);
7976                 if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
7977                         goto done;
7978                 /* delay and try again */
7979                 msleep(CLEAR_EVENT_WAIT_INTERVAL);
7980         }
7981         return -ENODEV;
7982 done:
7983         return 0;
7984 }
7985
7986 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7987 {
7988         int i;
7989         u32 doorbell_value;
7990         unsigned long flags;
7991
7992         /* under certain very rare conditions, this can take awhile.
7993          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
7994          * as we enter this code.)
7995          */
7996         for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7997                 if (h->remove_in_progress)
7998                         goto done;
7999                 spin_lock_irqsave(&h->lock, flags);
8000                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
8001                 spin_unlock_irqrestore(&h->lock, flags);
8002                 if (!(doorbell_value & CFGTBL_ChangeReq))
8003                         goto done;
8004                 /* delay and try again */
8005                 msleep(MODE_CHANGE_WAIT_INTERVAL);
8006         }
8007         return -ENODEV;
8008 done:
8009         return 0;
8010 }
8011
8012 /* return -ENODEV or other reason on error, 0 on success */
8013 static int hpsa_enter_simple_mode(struct ctlr_info *h)
8014 {
8015         u32 trans_support;
8016
8017         trans_support = readl(&(h->cfgtable->TransportSupport));
8018         if (!(trans_support & SIMPLE_MODE))
8019                 return -ENOTSUPP;
8020
8021         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
8022
8023         /* Update the field, and then ring the doorbell */
8024         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
8025         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
8026         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8027         if (hpsa_wait_for_mode_change_ack(h))
8028                 goto error;
8029         print_cfg_table(&h->pdev->dev, h->cfgtable);
8030         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
8031                 goto error;
8032         h->transMethod = CFGTBL_Trans_Simple;
8033         return 0;
8034 error:
8035         dev_err(&h->pdev->dev, "failed to enter simple mode\n");
8036         return -ENODEV;
8037 }
8038
8039 /* free items allocated or mapped by hpsa_pci_init */
8040 static void hpsa_free_pci_init(struct ctlr_info *h)
8041 {
8042         hpsa_free_cfgtables(h);                 /* pci_init 4 */
8043         iounmap(h->vaddr);                      /* pci_init 3 */
8044         h->vaddr = NULL;
8045         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
8046         /*
8047          * call pci_disable_device before pci_release_regions per
8048          * Documentation/PCI/pci.txt
8049          */
8050         pci_disable_device(h->pdev);            /* pci_init 1 */
8051         pci_release_regions(h->pdev);           /* pci_init 2 */
8052 }
8053
8054 /* several items must be freed later */
8055 static int hpsa_pci_init(struct ctlr_info *h)
8056 {
8057         int prod_index, err;
8058
8059         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id);
8060         if (prod_index < 0)
8061                 return prod_index;
8062         h->product_name = products[prod_index].product_name;
8063         h->access = *(products[prod_index].access);
8064
8065         h->needs_abort_tags_swizzled =
8066                 ctlr_needs_abort_tags_swizzled(h->board_id);
8067
8068         pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
8069                                PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
8070
8071         err = pci_enable_device(h->pdev);
8072         if (err) {
8073                 dev_err(&h->pdev->dev, "failed to enable PCI device\n");
8074                 pci_disable_device(h->pdev);
8075                 return err;
8076         }
8077
8078         err = pci_request_regions(h->pdev, HPSA);
8079         if (err) {
8080                 dev_err(&h->pdev->dev,
8081                         "failed to obtain PCI resources\n");
8082                 pci_disable_device(h->pdev);
8083                 return err;
8084         }
8085
8086         pci_set_master(h->pdev);
8087
8088         hpsa_interrupt_mode(h);
8089         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
8090         if (err)
8091                 goto clean2;    /* intmode+region, pci */
8092         h->vaddr = remap_pci_mem(h->paddr, 0x250);
8093         if (!h->vaddr) {
8094                 dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
8095                 err = -ENOMEM;
8096                 goto clean2;    /* intmode+region, pci */
8097         }
8098         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8099         if (err)
8100                 goto clean3;    /* vaddr, intmode+region, pci */
8101         err = hpsa_find_cfgtables(h);
8102         if (err)
8103                 goto clean3;    /* vaddr, intmode+region, pci */
8104         hpsa_find_board_params(h);
8105
8106         if (!hpsa_CISS_signature_present(h)) {
8107                 err = -ENODEV;
8108                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
8109         }
8110         hpsa_set_driver_support_bits(h);
8111         hpsa_p600_dma_prefetch_quirk(h);
8112         err = hpsa_enter_simple_mode(h);
8113         if (err)
8114                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
8115         return 0;
8116
8117 clean4: /* cfgtables, vaddr, intmode+region, pci */
8118         hpsa_free_cfgtables(h);
8119 clean3: /* vaddr, intmode+region, pci */
8120         iounmap(h->vaddr);
8121         h->vaddr = NULL;
8122 clean2: /* intmode+region, pci */
8123         hpsa_disable_interrupt_mode(h);
8124         /*
8125          * call pci_disable_device before pci_release_regions per
8126          * Documentation/PCI/pci.txt
8127          */
8128         pci_disable_device(h->pdev);
8129         pci_release_regions(h->pdev);
8130         return err;
8131 }
8132
8133 static void hpsa_hba_inquiry(struct ctlr_info *h)
8134 {
8135         int rc;
8136
8137 #define HBA_INQUIRY_BYTE_COUNT 64
8138         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
8139         if (!h->hba_inquiry_data)
8140                 return;
8141         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
8142                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
8143         if (rc != 0) {
8144                 kfree(h->hba_inquiry_data);
8145                 h->hba_inquiry_data = NULL;
8146         }
8147 }
8148
8149 static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
8150 {
8151         int rc, i;
8152         void __iomem *vaddr;
8153
8154         if (!reset_devices)
8155                 return 0;
8156
8157         /* kdump kernel is loading, we don't know in which state is
8158          * the pci interface. The dev->enable_cnt is equal zero
8159          * so we call enable+disable, wait a while and switch it on.
8160          */
8161         rc = pci_enable_device(pdev);
8162         if (rc) {
8163                 dev_warn(&pdev->dev, "Failed to enable PCI device\n");
8164                 return -ENODEV;
8165         }
8166         pci_disable_device(pdev);
8167         msleep(260);                    /* a randomly chosen number */
8168         rc = pci_enable_device(pdev);
8169         if (rc) {
8170                 dev_warn(&pdev->dev, "failed to enable device.\n");
8171                 return -ENODEV;
8172         }
8173
8174         pci_set_master(pdev);
8175
8176         vaddr = pci_ioremap_bar(pdev, 0);
8177         if (vaddr == NULL) {
8178                 rc = -ENOMEM;
8179                 goto out_disable;
8180         }
8181         writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
8182         iounmap(vaddr);
8183
8184         /* Reset the controller with a PCI power-cycle or via doorbell */
8185         rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
8186
8187         /* -ENOTSUPP here means we cannot reset the controller
8188          * but it's already (and still) up and running in
8189          * "performant mode".  Or, it might be 640x, which can't reset
8190          * due to concerns about shared bbwc between 6402/6404 pair.
8191          */
8192         if (rc)
8193                 goto out_disable;
8194
8195         /* Now try to get the controller to respond to a no-op */
8196         dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
8197         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
8198                 if (hpsa_noop(pdev) == 0)
8199                         break;
8200                 else
8201                         dev_warn(&pdev->dev, "no-op failed%s\n",
8202                                         (i < 11 ? "; re-trying" : ""));
8203         }
8204
8205 out_disable:
8206
8207         pci_disable_device(pdev);
8208         return rc;
8209 }
8210
8211 static void hpsa_free_cmd_pool(struct ctlr_info *h)
8212 {
8213         kfree(h->cmd_pool_bits);
8214         h->cmd_pool_bits = NULL;
8215         if (h->cmd_pool) {
8216                 pci_free_consistent(h->pdev,
8217                                 h->nr_cmds * sizeof(struct CommandList),
8218                                 h->cmd_pool,
8219                                 h->cmd_pool_dhandle);
8220                 h->cmd_pool = NULL;
8221                 h->cmd_pool_dhandle = 0;
8222         }
8223         if (h->errinfo_pool) {
8224                 pci_free_consistent(h->pdev,
8225                                 h->nr_cmds * sizeof(struct ErrorInfo),
8226                                 h->errinfo_pool,
8227                                 h->errinfo_pool_dhandle);
8228                 h->errinfo_pool = NULL;
8229                 h->errinfo_pool_dhandle = 0;
8230         }
8231 }
8232
8233 static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
8234 {
8235         h->cmd_pool_bits = kzalloc(
8236                 DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG) *
8237                 sizeof(unsigned long), GFP_KERNEL);
8238         h->cmd_pool = pci_alloc_consistent(h->pdev,
8239                     h->nr_cmds * sizeof(*h->cmd_pool),
8240                     &(h->cmd_pool_dhandle));
8241         h->errinfo_pool = pci_alloc_consistent(h->pdev,
8242                     h->nr_cmds * sizeof(*h->errinfo_pool),
8243                     &(h->errinfo_pool_dhandle));
8244         if ((h->cmd_pool_bits == NULL)
8245             || (h->cmd_pool == NULL)
8246             || (h->errinfo_pool == NULL)) {
8247                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
8248                 goto clean_up;
8249         }
8250         hpsa_preinitialize_commands(h);
8251         return 0;
8252 clean_up:
8253         hpsa_free_cmd_pool(h);
8254         return -ENOMEM;
8255 }
8256
8257 static void hpsa_irq_affinity_hints(struct ctlr_info *h)
8258 {
8259         int i, cpu;
8260
8261         cpu = cpumask_first(cpu_online_mask);
8262         for (i = 0; i < h->msix_vector; i++) {
8263                 irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu));
8264                 cpu = cpumask_next(cpu, cpu_online_mask);
8265         }
8266 }
8267
8268 /* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
8269 static void hpsa_free_irqs(struct ctlr_info *h)
8270 {
8271         int i;
8272
8273         if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) {
8274                 /* Single reply queue, only one irq to free */
8275                 i = h->intr_mode;
8276                 irq_set_affinity_hint(h->intr[i], NULL);
8277                 free_irq(h->intr[i], &h->q[i]);
8278                 h->q[i] = 0;
8279                 return;
8280         }
8281
8282         for (i = 0; i < h->msix_vector; i++) {
8283                 irq_set_affinity_hint(h->intr[i], NULL);
8284                 free_irq(h->intr[i], &h->q[i]);
8285                 h->q[i] = 0;
8286         }
8287         for (; i < MAX_REPLY_QUEUES; i++)
8288                 h->q[i] = 0;
8289 }
8290
8291 /* returns 0 on success; cleans up and returns -Enn on error */
8292 static int hpsa_request_irqs(struct ctlr_info *h,
8293         irqreturn_t (*msixhandler)(int, void *),
8294         irqreturn_t (*intxhandler)(int, void *))
8295 {
8296         int rc, i;
8297
8298         /*
8299          * initialize h->q[x] = x so that interrupt handlers know which
8300          * queue to process.
8301          */
8302         for (i = 0; i < MAX_REPLY_QUEUES; i++)
8303                 h->q[i] = (u8) i;
8304
8305         if (h->intr_mode == PERF_MODE_INT && h->msix_vector > 0) {
8306                 /* If performant mode and MSI-X, use multiple reply queues */
8307                 for (i = 0; i < h->msix_vector; i++) {
8308                         sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
8309                         rc = request_irq(h->intr[i], msixhandler,
8310                                         0, h->intrname[i],
8311                                         &h->q[i]);
8312                         if (rc) {
8313                                 int j;
8314
8315                                 dev_err(&h->pdev->dev,
8316                                         "failed to get irq %d for %s\n",
8317                                        h->intr[i], h->devname);
8318                                 for (j = 0; j < i; j++) {
8319                                         free_irq(h->intr[j], &h->q[j]);
8320                                         h->q[j] = 0;
8321                                 }
8322                                 for (; j < MAX_REPLY_QUEUES; j++)
8323                                         h->q[j] = 0;
8324                                 return rc;
8325                         }
8326                 }
8327                 hpsa_irq_affinity_hints(h);
8328         } else {
8329                 /* Use single reply pool */
8330                 if (h->msix_vector > 0 || h->msi_vector) {
8331                         if (h->msix_vector)
8332                                 sprintf(h->intrname[h->intr_mode],
8333                                         "%s-msix", h->devname);
8334                         else
8335                                 sprintf(h->intrname[h->intr_mode],
8336                                         "%s-msi", h->devname);
8337                         rc = request_irq(h->intr[h->intr_mode],
8338                                 msixhandler, 0,
8339                                 h->intrname[h->intr_mode],
8340                                 &h->q[h->intr_mode]);
8341                 } else {
8342                         sprintf(h->intrname[h->intr_mode],
8343                                 "%s-intx", h->devname);
8344                         rc = request_irq(h->intr[h->intr_mode],
8345                                 intxhandler, IRQF_SHARED,
8346                                 h->intrname[h->intr_mode],
8347                                 &h->q[h->intr_mode]);
8348                 }
8349                 irq_set_affinity_hint(h->intr[h->intr_mode], NULL);
8350         }
8351         if (rc) {
8352                 dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8353                        h->intr[h->intr_mode], h->devname);
8354                 hpsa_free_irqs(h);
8355                 return -ENODEV;
8356         }
8357         return 0;
8358 }
8359
8360 static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8361 {
8362         int rc;
8363         hpsa_send_host_reset(h, RAID_CTLR_LUNID, HPSA_RESET_TYPE_CONTROLLER);
8364
8365         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8366         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
8367         if (rc) {
8368                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8369                 return rc;
8370         }
8371
8372         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8373         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8374         if (rc) {
8375                 dev_warn(&h->pdev->dev, "Board failed to become ready "
8376                         "after soft reset.\n");
8377                 return rc;
8378         }
8379
8380         return 0;
8381 }
8382
8383 static void hpsa_free_reply_queues(struct ctlr_info *h)
8384 {
8385         int i;
8386
8387         for (i = 0; i < h->nreply_queues; i++) {
8388                 if (!h->reply_queue[i].head)
8389                         continue;
8390                 pci_free_consistent(h->pdev,
8391                                         h->reply_queue_size,
8392                                         h->reply_queue[i].head,
8393                                         h->reply_queue[i].busaddr);
8394                 h->reply_queue[i].head = NULL;
8395                 h->reply_queue[i].busaddr = 0;
8396         }
8397         h->reply_queue_size = 0;
8398 }
8399
8400 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
8401 {
8402         hpsa_free_performant_mode(h);           /* init_one 7 */
8403         hpsa_free_sg_chain_blocks(h);           /* init_one 6 */
8404         hpsa_free_cmd_pool(h);                  /* init_one 5 */
8405         hpsa_free_irqs(h);                      /* init_one 4 */
8406         scsi_host_put(h->scsi_host);            /* init_one 3 */
8407         h->scsi_host = NULL;                    /* init_one 3 */
8408         hpsa_free_pci_init(h);                  /* init_one 2_5 */
8409         free_percpu(h->lockup_detected);        /* init_one 2 */
8410         h->lockup_detected = NULL;              /* init_one 2 */
8411         if (h->resubmit_wq) {
8412                 destroy_workqueue(h->resubmit_wq);      /* init_one 1 */
8413                 h->resubmit_wq = NULL;
8414         }
8415         if (h->rescan_ctlr_wq) {
8416                 destroy_workqueue(h->rescan_ctlr_wq);
8417                 h->rescan_ctlr_wq = NULL;
8418         }
8419         kfree(h);                               /* init_one 1 */
8420 }
8421
8422 /* Called when controller lockup detected. */
8423 static void fail_all_outstanding_cmds(struct ctlr_info *h)
8424 {
8425         int i, refcount;
8426         struct CommandList *c;
8427         int failcount = 0;
8428
8429         flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8430         for (i = 0; i < h->nr_cmds; i++) {
8431                 c = h->cmd_pool + i;
8432                 refcount = atomic_inc_return(&c->refcount);
8433                 if (refcount > 1) {
8434                         c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8435                         finish_cmd(c);
8436                         atomic_dec(&h->commands_outstanding);
8437                         failcount++;
8438                 }
8439                 cmd_free(h, c);
8440         }
8441         dev_warn(&h->pdev->dev,
8442                 "failed %d commands in fail_all\n", failcount);
8443 }
8444
8445 static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
8446 {
8447         int cpu;
8448
8449         for_each_online_cpu(cpu) {
8450                 u32 *lockup_detected;
8451                 lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
8452                 *lockup_detected = value;
8453         }
8454         wmb(); /* be sure the per-cpu variables are out to memory */
8455 }
8456
8457 static void controller_lockup_detected(struct ctlr_info *h)
8458 {
8459         unsigned long flags;
8460         u32 lockup_detected;
8461
8462         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8463         spin_lock_irqsave(&h->lock, flags);
8464         lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
8465         if (!lockup_detected) {
8466                 /* no heartbeat, but controller gave us a zero. */
8467                 dev_warn(&h->pdev->dev,
8468                         "lockup detected after %d but scratchpad register is zero\n",
8469                         h->heartbeat_sample_interval / HZ);
8470                 lockup_detected = 0xffffffff;
8471         }
8472         set_lockup_detected_for_all_cpus(h, lockup_detected);
8473         spin_unlock_irqrestore(&h->lock, flags);
8474         dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
8475                         lockup_detected, h->heartbeat_sample_interval / HZ);
8476         pci_disable_device(h->pdev);
8477         fail_all_outstanding_cmds(h);
8478 }
8479
8480 static int detect_controller_lockup(struct ctlr_info *h)
8481 {
8482         u64 now;
8483         u32 heartbeat;
8484         unsigned long flags;
8485
8486         now = get_jiffies_64();
8487         /* If we've received an interrupt recently, we're ok. */
8488         if (time_after64(h->last_intr_timestamp +
8489                                 (h->heartbeat_sample_interval), now))
8490                 return false;
8491
8492         /*
8493          * If we've already checked the heartbeat recently, we're ok.
8494          * This could happen if someone sends us a signal. We
8495          * otherwise don't care about signals in this thread.
8496          */
8497         if (time_after64(h->last_heartbeat_timestamp +
8498                                 (h->heartbeat_sample_interval), now))
8499                 return false;
8500
8501         /* If heartbeat has not changed since we last looked, we're not ok. */
8502         spin_lock_irqsave(&h->lock, flags);
8503         heartbeat = readl(&h->cfgtable->HeartBeat);
8504         spin_unlock_irqrestore(&h->lock, flags);
8505         if (h->last_heartbeat == heartbeat) {
8506                 controller_lockup_detected(h);
8507                 return true;
8508         }
8509
8510         /* We're ok. */
8511         h->last_heartbeat = heartbeat;
8512         h->last_heartbeat_timestamp = now;
8513         return false;
8514 }
8515
8516 static void hpsa_ack_ctlr_events(struct ctlr_info *h)
8517 {
8518         int i;
8519         char *event_type;
8520
8521         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8522                 return;
8523
8524         /* Ask the controller to clear the events we're handling. */
8525         if ((h->transMethod & (CFGTBL_Trans_io_accel1
8526                         | CFGTBL_Trans_io_accel2)) &&
8527                 (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
8528                  h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {
8529
8530                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
8531                         event_type = "state change";
8532                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
8533                         event_type = "configuration change";
8534                 /* Stop sending new RAID offload reqs via the IO accelerator */
8535                 scsi_block_requests(h->scsi_host);
8536                 for (i = 0; i < h->ndevices; i++) {
8537                         h->dev[i]->offload_enabled = 0;
8538                         h->dev[i]->offload_to_be_enabled = 0;
8539                 }
8540                 hpsa_drain_accel_commands(h);
8541                 /* Set 'accelerator path config change' bit */
8542                 dev_warn(&h->pdev->dev,
8543                         "Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
8544                         h->events, event_type);
8545                 writel(h->events, &(h->cfgtable->clear_event_notify));
8546                 /* Set the "clear event notify field update" bit 6 */
8547                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8548                 /* Wait until ctlr clears 'clear event notify field', bit 6 */
8549                 hpsa_wait_for_clear_event_notify_ack(h);
8550                 scsi_unblock_requests(h->scsi_host);
8551         } else {
8552                 /* Acknowledge controller notification events. */
8553                 writel(h->events, &(h->cfgtable->clear_event_notify));
8554                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8555                 hpsa_wait_for_clear_event_notify_ack(h);
8556 #if 0
8557                 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
8558                 hpsa_wait_for_mode_change_ack(h);
8559 #endif
8560         }
8561         return;
8562 }
8563
8564 /* Check a register on the controller to see if there are configuration
8565  * changes (added/changed/removed logical drives, etc.) which mean that
8566  * we should rescan the controller for devices.
8567  * Also check flag for driver-initiated rescan.
8568  */
8569 static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8570 {
8571         if (h->drv_req_rescan) {
8572                 h->drv_req_rescan = 0;
8573                 return 1;
8574         }
8575
8576         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8577                 return 0;
8578
8579         h->events = readl(&(h->cfgtable->event_notify));
8580         return h->events & RESCAN_REQUIRED_EVENT_BITS;
8581 }
8582
8583 /*
8584  * Check if any of the offline devices have become ready
8585  */
8586 static int hpsa_offline_devices_ready(struct ctlr_info *h)
8587 {
8588         unsigned long flags;
8589         struct offline_device_entry *d;
8590         struct list_head *this, *tmp;
8591
8592         spin_lock_irqsave(&h->offline_device_lock, flags);
8593         list_for_each_safe(this, tmp, &h->offline_device_list) {
8594                 d = list_entry(this, struct offline_device_entry,
8595                                 offline_list);
8596                 spin_unlock_irqrestore(&h->offline_device_lock, flags);
8597                 if (!hpsa_volume_offline(h, d->scsi3addr)) {
8598                         spin_lock_irqsave(&h->offline_device_lock, flags);
8599                         list_del(&d->offline_list);
8600                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8601                         return 1;
8602                 }
8603                 spin_lock_irqsave(&h->offline_device_lock, flags);
8604         }
8605         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8606         return 0;
8607 }
8608
8609 static int hpsa_luns_changed(struct ctlr_info *h)
8610 {
8611         int rc = 1; /* assume there are changes */
8612         struct ReportLUNdata *logdev = NULL;
8613
8614         /* if we can't find out if lun data has changed,
8615          * assume that it has.
8616          */
8617
8618         if (!h->lastlogicals)
8619                 goto out;
8620
8621         logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
8622         if (!logdev) {
8623                 dev_warn(&h->pdev->dev,
8624                         "Out of memory, can't track lun changes.\n");
8625                 goto out;
8626         }
8627         if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
8628                 dev_warn(&h->pdev->dev,
8629                         "report luns failed, can't track lun changes.\n");
8630                 goto out;
8631         }
8632         if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
8633                 dev_info(&h->pdev->dev,
8634                         "Lun changes detected.\n");
8635                 memcpy(h->lastlogicals, logdev, sizeof(*logdev));
8636                 goto out;
8637         } else
8638                 rc = 0; /* no changes detected. */
8639 out:
8640         kfree(logdev);
8641         return rc;
8642 }
8643
8644 static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8645 {
8646         unsigned long flags;
8647         struct ctlr_info *h = container_of(to_delayed_work(work),
8648                                         struct ctlr_info, rescan_ctlr_work);
8649
8650
8651         if (h->remove_in_progress)
8652                 return;
8653
8654         if (hpsa_ctlr_needs_rescan(h) || hpsa_offline_devices_ready(h)) {
8655                 scsi_host_get(h->scsi_host);
8656                 hpsa_ack_ctlr_events(h);
8657                 hpsa_scan_start(h->scsi_host);
8658                 scsi_host_put(h->scsi_host);
8659         } else if (h->discovery_polling) {
8660                 hpsa_disable_rld_caching(h);
8661                 if (hpsa_luns_changed(h)) {
8662                         struct Scsi_Host *sh = NULL;
8663
8664                         dev_info(&h->pdev->dev,
8665                                 "driver discovery polling rescan.\n");
8666                         sh = scsi_host_get(h->scsi_host);
8667                         if (sh != NULL) {
8668                                 hpsa_scan_start(sh);
8669                                 scsi_host_put(sh);
8670                         }
8671                 }
8672         }
8673         spin_lock_irqsave(&h->lock, flags);
8674         if (!h->remove_in_progress)
8675                 queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8676                                 h->heartbeat_sample_interval);
8677         spin_unlock_irqrestore(&h->lock, flags);
8678 }
8679
8680 static void hpsa_monitor_ctlr_worker(struct work_struct *work)
8681 {
8682         unsigned long flags;
8683         struct ctlr_info *h = container_of(to_delayed_work(work),
8684                                         struct ctlr_info, monitor_ctlr_work);
8685
8686         detect_controller_lockup(h);
8687         if (lockup_detected(h))
8688                 return;
8689
8690         spin_lock_irqsave(&h->lock, flags);
8691         if (!h->remove_in_progress)
8692                 schedule_delayed_work(&h->monitor_ctlr_work,
8693                                 h->heartbeat_sample_interval);
8694         spin_unlock_irqrestore(&h->lock, flags);
8695 }
8696
8697 static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
8698                                                 char *name)
8699 {
8700         struct workqueue_struct *wq = NULL;
8701
8702         wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8703         if (!wq)
8704                 dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);
8705
8706         return wq;
8707 }
8708
8709 static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8710 {
8711         int dac, rc;
8712         struct ctlr_info *h;
8713         int try_soft_reset = 0;
8714         unsigned long flags;
8715         u32 board_id;
8716
8717         if (number_of_controllers == 0)
8718                 printk(KERN_INFO DRIVER_NAME "\n");
8719
8720         rc = hpsa_lookup_board_id(pdev, &board_id);
8721         if (rc < 0) {
8722                 dev_warn(&pdev->dev, "Board ID not found\n");
8723                 return rc;
8724         }
8725
8726         rc = hpsa_init_reset_devices(pdev, board_id);
8727         if (rc) {
8728                 if (rc != -ENOTSUPP)
8729                         return rc;
8730                 /* If the reset fails in a particular way (it has no way to do
8731                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
8732                  * a soft reset once we get the controller configured up to the
8733                  * point that it can accept a command.
8734                  */
8735                 try_soft_reset = 1;
8736                 rc = 0;
8737         }
8738
8739 reinit_after_soft_reset:
8740
8741         /* Command structures must be aligned on a 32-byte boundary because
8742          * the 5 lower bits of the address are used by the hardware. and by
8743          * the driver.  See comments in hpsa.h for more info.
8744          */
8745         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
8746         h = kzalloc(sizeof(*h), GFP_KERNEL);
8747         if (!h) {
8748                 dev_err(&pdev->dev, "Failed to allocate controller head\n");
8749                 return -ENOMEM;
8750         }
8751
8752         h->pdev = pdev;
8753
8754         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8755         INIT_LIST_HEAD(&h->offline_device_list);
8756         spin_lock_init(&h->lock);
8757         spin_lock_init(&h->offline_device_lock);
8758         spin_lock_init(&h->scan_lock);
8759         atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
8760         atomic_set(&h->abort_cmds_available, HPSA_CMDS_RESERVED_FOR_ABORTS);
8761
8762         /* Allocate and clear per-cpu variable lockup_detected */
8763         h->lockup_detected = alloc_percpu(u32);
8764         if (!h->lockup_detected) {
8765                 dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8766                 rc = -ENOMEM;
8767                 goto clean1;    /* aer/h */
8768         }
8769         set_lockup_detected_for_all_cpus(h, 0);
8770
8771         rc = hpsa_pci_init(h);
8772         if (rc)
8773                 goto clean2;    /* lu, aer/h */
8774
8775         /* relies on h-> settings made by hpsa_pci_init, including
8776          * interrupt_mode h->intr */
8777         rc = hpsa_scsi_host_alloc(h);
8778         if (rc)
8779                 goto clean2_5;  /* pci, lu, aer/h */
8780
8781         sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8782         h->ctlr = number_of_controllers;
8783         number_of_controllers++;
8784
8785         /* configure PCI DMA stuff */
8786         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
8787         if (rc == 0) {
8788                 dac = 1;
8789         } else {
8790                 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
8791                 if (rc == 0) {
8792                         dac = 0;
8793                 } else {
8794                         dev_err(&pdev->dev, "no suitable DMA available\n");
8795                         goto clean3;    /* shost, pci, lu, aer/h */
8796                 }
8797         }
8798
8799         /* make sure the board interrupts are off */
8800         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8801
8802         rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
8803         if (rc)
8804                 goto clean3;    /* shost, pci, lu, aer/h */
8805         rc = hpsa_alloc_cmd_pool(h);
8806         if (rc)
8807                 goto clean4;    /* irq, shost, pci, lu, aer/h */
8808         rc = hpsa_alloc_sg_chain_blocks(h);
8809         if (rc)
8810                 goto clean5;    /* cmd, irq, shost, pci, lu, aer/h */
8811         init_waitqueue_head(&h->scan_wait_queue);
8812         init_waitqueue_head(&h->abort_cmd_wait_queue);
8813         init_waitqueue_head(&h->event_sync_wait_queue);
8814         mutex_init(&h->reset_mutex);
8815         h->scan_finished = 1; /* no scan currently in progress */
8816         h->scan_waiting = 0;
8817
8818         pci_set_drvdata(pdev, h);
8819         h->ndevices = 0;
8820
8821         spin_lock_init(&h->devlock);
8822         rc = hpsa_put_ctlr_into_performant_mode(h);
8823         if (rc)
8824                 goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */
8825
8826         /* create the resubmit workqueue */
8827         h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
8828         if (!h->rescan_ctlr_wq) {
8829                 rc = -ENOMEM;
8830                 goto clean7;
8831         }
8832
8833         h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
8834         if (!h->resubmit_wq) {
8835                 rc = -ENOMEM;
8836                 goto clean7;    /* aer/h */
8837         }
8838
8839         /*
8840          * At this point, the controller is ready to take commands.
8841          * Now, if reset_devices and the hard reset didn't work, try
8842          * the soft reset and see if that works.
8843          */
8844         if (try_soft_reset) {
8845
8846                 /* This is kind of gross.  We may or may not get a completion
8847                  * from the soft reset command, and if we do, then the value
8848                  * from the fifo may or may not be valid.  So, we wait 10 secs
8849                  * after the reset throwing away any completions we get during
8850                  * that time.  Unregister the interrupt handler and register
8851                  * fake ones to scoop up any residual completions.
8852                  */
8853                 spin_lock_irqsave(&h->lock, flags);
8854                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8855                 spin_unlock_irqrestore(&h->lock, flags);
8856                 hpsa_free_irqs(h);
8857                 rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8858                                         hpsa_intx_discard_completions);
8859                 if (rc) {
8860                         dev_warn(&h->pdev->dev,
8861                                 "Failed to request_irq after soft reset.\n");
8862                         /*
8863                          * cannot goto clean7 or free_irqs will be called
8864                          * again. Instead, do its work
8865                          */
8866                         hpsa_free_performant_mode(h);   /* clean7 */
8867                         hpsa_free_sg_chain_blocks(h);   /* clean6 */
8868                         hpsa_free_cmd_pool(h);          /* clean5 */
8869                         /*
8870                          * skip hpsa_free_irqs(h) clean4 since that
8871                          * was just called before request_irqs failed
8872                          */
8873                         goto clean3;
8874                 }
8875
8876                 rc = hpsa_kdump_soft_reset(h);
8877                 if (rc)
8878                         /* Neither hard nor soft reset worked, we're hosed. */
8879                         goto clean7;
8880
8881                 dev_info(&h->pdev->dev, "Board READY.\n");
8882                 dev_info(&h->pdev->dev,
8883                         "Waiting for stale completions to drain.\n");
8884                 h->access.set_intr_mask(h, HPSA_INTR_ON);
8885                 msleep(10000);
8886                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8887
8888                 rc = controller_reset_failed(h->cfgtable);
8889                 if (rc)
8890                         dev_info(&h->pdev->dev,
8891                                 "Soft reset appears to have failed.\n");
8892
8893                 /* since the controller's reset, we have to go back and re-init
8894                  * everything.  Easiest to just forget what we've done and do it
8895                  * all over again.
8896                  */
8897                 hpsa_undo_allocations_after_kdump_soft_reset(h);
8898                 try_soft_reset = 0;
8899                 if (rc)
8900                         /* don't goto clean, we already unallocated */
8901                         return -ENODEV;
8902
8903                 goto reinit_after_soft_reset;
8904         }
8905
8906         /* Enable Accelerated IO path at driver layer */
8907         h->acciopath_status = 1;
8908         /* Disable discovery polling.*/
8909         h->discovery_polling = 0;
8910
8911
8912         /* Turn the interrupts on so we can service requests */
8913         h->access.set_intr_mask(h, HPSA_INTR_ON);
8914
8915         hpsa_hba_inquiry(h);
8916
8917         h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
8918         if (!h->lastlogicals)
8919                 dev_info(&h->pdev->dev,
8920                         "Can't track change to report lun data\n");
8921
8922         /* hook into SCSI subsystem */
8923         rc = hpsa_scsi_add_host(h);
8924         if (rc)
8925                 goto clean7; /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8926
8927         /* Monitor the controller for firmware lockups */
8928         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
8929         INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
8930         schedule_delayed_work(&h->monitor_ctlr_work,
8931                                 h->heartbeat_sample_interval);
8932         INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
8933         queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8934                                 h->heartbeat_sample_interval);
8935         return 0;
8936
8937 clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8938         hpsa_free_performant_mode(h);
8939         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8940 clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8941         hpsa_free_sg_chain_blocks(h);
8942 clean5: /* cmd, irq, shost, pci, lu, aer/h */
8943         hpsa_free_cmd_pool(h);
8944 clean4: /* irq, shost, pci, lu, aer/h */
8945         hpsa_free_irqs(h);
8946 clean3: /* shost, pci, lu, aer/h */
8947         scsi_host_put(h->scsi_host);
8948         h->scsi_host = NULL;
8949 clean2_5: /* pci, lu, aer/h */
8950         hpsa_free_pci_init(h);
8951 clean2: /* lu, aer/h */
8952         if (h->lockup_detected) {
8953                 free_percpu(h->lockup_detected);
8954                 h->lockup_detected = NULL;
8955         }
8956 clean1: /* wq/aer/h */
8957         if (h->resubmit_wq) {
8958                 destroy_workqueue(h->resubmit_wq);
8959                 h->resubmit_wq = NULL;
8960         }
8961         if (h->rescan_ctlr_wq) {
8962                 destroy_workqueue(h->rescan_ctlr_wq);
8963                 h->rescan_ctlr_wq = NULL;
8964         }
8965         kfree(h);
8966         return rc;
8967 }
8968
8969 static void hpsa_flush_cache(struct ctlr_info *h)
8970 {
8971         char *flush_buf;
8972         struct CommandList *c;
8973         int rc;
8974
8975         if (unlikely(lockup_detected(h)))
8976                 return;
8977         flush_buf = kzalloc(4, GFP_KERNEL);
8978         if (!flush_buf)
8979                 return;
8980
8981         c = cmd_alloc(h);
8982
8983         if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
8984                 RAID_CTLR_LUNID, TYPE_CMD)) {
8985                 goto out;
8986         }
8987         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
8988                                         PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
8989         if (rc)
8990                 goto out;
8991         if (c->err_info->CommandStatus != 0)
8992 out:
8993                 dev_warn(&h->pdev->dev,
8994                         "error flushing cache on controller\n");
8995         cmd_free(h, c);
8996         kfree(flush_buf);
8997 }
8998
8999 /* Make controller gather fresh report lun data each time we
9000  * send down a report luns request
9001  */
9002 static void hpsa_disable_rld_caching(struct ctlr_info *h)
9003 {
9004         u32 *options;
9005         struct CommandList *c;
9006         int rc;
9007
9008         /* Don't bother trying to set diag options if locked up */
9009         if (unlikely(h->lockup_detected))
9010                 return;
9011
9012         options = kzalloc(sizeof(*options), GFP_KERNEL);
9013         if (!options) {
9014                 dev_err(&h->pdev->dev,
9015                         "Error: failed to disable rld caching, during alloc.\n");
9016                 return;
9017         }
9018
9019         c = cmd_alloc(h);
9020
9021         /* first, get the current diag options settings */
9022         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
9023                 RAID_CTLR_LUNID, TYPE_CMD))
9024                 goto errout;
9025
9026         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9027                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
9028         if ((rc != 0) || (c->err_info->CommandStatus != 0))
9029                 goto errout;
9030
9031         /* Now, set the bit for disabling the RLD caching */
9032         *options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;
9033
9034         if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
9035                 RAID_CTLR_LUNID, TYPE_CMD))
9036                 goto errout;
9037
9038         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9039                 PCI_DMA_TODEVICE, DEFAULT_TIMEOUT);
9040         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9041                 goto errout;
9042
9043         /* Now verify that it got set: */
9044         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
9045                 RAID_CTLR_LUNID, TYPE_CMD))
9046                 goto errout;
9047
9048         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c,
9049                 PCI_DMA_FROMDEVICE, DEFAULT_TIMEOUT);
9050         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9051                 goto errout;
9052
9053         if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
9054                 goto out;
9055
9056 errout:
9057         dev_err(&h->pdev->dev,
9058                         "Error: failed to disable report lun data caching.\n");
9059 out:
9060         cmd_free(h, c);
9061         kfree(options);
9062 }
9063
9064 static void hpsa_shutdown(struct pci_dev *pdev)
9065 {
9066         struct ctlr_info *h;
9067
9068         h = pci_get_drvdata(pdev);
9069         /* Turn board interrupts off  and send the flush cache command
9070          * sendcmd will turn off interrupt, and send the flush...
9071          * To write all data in the battery backed cache to disks
9072          */
9073         hpsa_flush_cache(h);
9074         h->access.set_intr_mask(h, HPSA_INTR_OFF);
9075         hpsa_free_irqs(h);                      /* init_one 4 */
9076         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
9077 }
9078
9079 static void hpsa_free_device_info(struct ctlr_info *h)
9080 {
9081         int i;
9082
9083         for (i = 0; i < h->ndevices; i++) {
9084                 kfree(h->dev[i]);
9085                 h->dev[i] = NULL;
9086         }
9087 }
9088
9089 static void hpsa_remove_one(struct pci_dev *pdev)
9090 {
9091         struct ctlr_info *h;
9092         unsigned long flags;
9093
9094         if (pci_get_drvdata(pdev) == NULL) {
9095                 dev_err(&pdev->dev, "unable to remove device\n");
9096                 return;
9097         }
9098         h = pci_get_drvdata(pdev);
9099
9100         /* Get rid of any controller monitoring work items */
9101         spin_lock_irqsave(&h->lock, flags);
9102         h->remove_in_progress = 1;
9103         spin_unlock_irqrestore(&h->lock, flags);
9104         cancel_delayed_work_sync(&h->monitor_ctlr_work);
9105         cancel_delayed_work_sync(&h->rescan_ctlr_work);
9106         destroy_workqueue(h->rescan_ctlr_wq);
9107         destroy_workqueue(h->resubmit_wq);
9108
9109         hpsa_delete_sas_host(h);
9110
9111         /*
9112          * Call before disabling interrupts.
9113          * scsi_remove_host can trigger I/O operations especially
9114          * when multipath is enabled. There can be SYNCHRONIZE CACHE
9115          * operations which cannot complete and will hang the system.
9116          */
9117         if (h->scsi_host)
9118                 scsi_remove_host(h->scsi_host);         /* init_one 8 */
9119         /* includes hpsa_free_irqs - init_one 4 */
9120         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9121         hpsa_shutdown(pdev);
9122
9123         hpsa_free_device_info(h);               /* scan */
9124
9125         kfree(h->hba_inquiry_data);                     /* init_one 10 */
9126         h->hba_inquiry_data = NULL;                     /* init_one 10 */
9127         hpsa_free_ioaccel2_sg_chain_blocks(h);
9128         hpsa_free_performant_mode(h);                   /* init_one 7 */
9129         hpsa_free_sg_chain_blocks(h);                   /* init_one 6 */
9130         hpsa_free_cmd_pool(h);                          /* init_one 5 */
9131         kfree(h->lastlogicals);
9132
9133         /* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
9134
9135         scsi_host_put(h->scsi_host);                    /* init_one 3 */
9136         h->scsi_host = NULL;                            /* init_one 3 */
9137
9138         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9139         hpsa_free_pci_init(h);                          /* init_one 2.5 */
9140
9141         free_percpu(h->lockup_detected);                /* init_one 2 */
9142         h->lockup_detected = NULL;                      /* init_one 2 */
9143         /* (void) pci_disable_pcie_error_reporting(pdev); */    /* init_one 1 */
9144
9145         kfree(h);                                       /* init_one 1 */
9146 }
9147
9148 static int hpsa_suspend(__attribute__((unused)) struct pci_dev *pdev,
9149         __attribute__((unused)) pm_message_t state)
9150 {
9151         return -ENOSYS;
9152 }
9153
9154 static int hpsa_resume(__attribute__((unused)) struct pci_dev *pdev)
9155 {
9156         return -ENOSYS;
9157 }
9158
9159 static struct pci_driver hpsa_pci_driver = {
9160         .name = HPSA,
9161         .probe = hpsa_init_one,
9162         .remove = hpsa_remove_one,
9163         .id_table = hpsa_pci_device_id, /* id_table */
9164         .shutdown = hpsa_shutdown,
9165         .suspend = hpsa_suspend,
9166         .resume = hpsa_resume,
9167 };
9168
9169 /* Fill in bucket_map[], given nsgs (the max number of
9170  * scatter gather elements supported) and bucket[],
9171  * which is an array of 8 integers.  The bucket[] array
9172  * contains 8 different DMA transfer sizes (in 16
9173  * byte increments) which the controller uses to fetch
9174  * commands.  This function fills in bucket_map[], which
9175  * maps a given number of scatter gather elements to one of
9176  * the 8 DMA transfer sizes.  The point of it is to allow the
9177  * controller to only do as much DMA as needed to fetch the
9178  * command, with the DMA transfer size encoded in the lower
9179  * bits of the command address.
9180  */
9181 static void  calc_bucket_map(int bucket[], int num_buckets,
9182         int nsgs, int min_blocks, u32 *bucket_map)
9183 {
9184         int i, j, b, size;
9185
9186         /* Note, bucket_map must have nsgs+1 entries. */
9187         for (i = 0; i <= nsgs; i++) {
9188                 /* Compute size of a command with i SG entries */
9189                 size = i + min_blocks;
9190                 b = num_buckets; /* Assume the biggest bucket */
9191                 /* Find the bucket that is just big enough */
9192                 for (j = 0; j < num_buckets; j++) {
9193                         if (bucket[j] >= size) {
9194                                 b = j;
9195                                 break;
9196                         }
9197                 }
9198                 /* for a command with i SG entries, use bucket b. */
9199                 bucket_map[i] = b;
9200         }
9201 }
9202
9203 /*
9204  * return -ENODEV on err, 0 on success (or no action)
9205  * allocates numerous items that must be freed later
9206  */
9207 static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
9208 {
9209         int i;
9210         unsigned long register_value;
9211         unsigned long transMethod = CFGTBL_Trans_Performant |
9212                         (trans_support & CFGTBL_Trans_use_short_tags) |
9213                                 CFGTBL_Trans_enable_directed_msix |
9214                         (trans_support & (CFGTBL_Trans_io_accel1 |
9215                                 CFGTBL_Trans_io_accel2));
9216         struct access_method access = SA5_performant_access;
9217
9218         /* This is a bit complicated.  There are 8 registers on
9219          * the controller which we write to to tell it 8 different
9220          * sizes of commands which there may be.  It's a way of
9221          * reducing the DMA done to fetch each command.  Encoded into
9222          * each command's tag are 3 bits which communicate to the controller
9223          * which of the eight sizes that command fits within.  The size of
9224          * each command depends on how many scatter gather entries there are.
9225          * Each SG entry requires 16 bytes.  The eight registers are programmed
9226          * with the number of 16-byte blocks a command of that size requires.
9227          * The smallest command possible requires 5 such 16 byte blocks.
9228          * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9229          * blocks.  Note, this only extends to the SG entries contained
9230          * within the command block, and does not extend to chained blocks
9231          * of SG elements.   bft[] contains the eight values we write to
9232          * the registers.  They are not evenly distributed, but have more
9233          * sizes for small commands, and fewer sizes for larger commands.
9234          */
9235         int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9236 #define MIN_IOACCEL2_BFT_ENTRY 5
9237 #define HPSA_IOACCEL2_HEADER_SZ 4
9238         int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
9239                         13, 14, 15, 16, 17, 18, 19,
9240                         HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
9241         BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
9242         BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
9243         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
9244                                  16 * MIN_IOACCEL2_BFT_ENTRY);
9245         BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
9246         BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9247         /*  5 = 1 s/g entry or 4k
9248          *  6 = 2 s/g entry or 8k
9249          *  8 = 4 s/g entry or 16k
9250          * 10 = 6 s/g entry or 24k
9251          */
9252
9253         /* If the controller supports either ioaccel method then
9254          * we can also use the RAID stack submit path that does not
9255          * perform the superfluous readl() after each command submission.
9256          */
9257         if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
9258                 access = SA5_performant_access_no_read;
9259
9260         /* Controller spec: zero out this buffer. */
9261         for (i = 0; i < h->nreply_queues; i++)
9262                 memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9263
9264         bft[7] = SG_ENTRIES_IN_CMD + 4;
9265         calc_bucket_map(bft, ARRAY_SIZE(bft),
9266                                 SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9267         for (i = 0; i < 8; i++)
9268                 writel(bft[i], &h->transtable->BlockFetch[i]);
9269
9270         /* size of controller ring buffer */
9271         writel(h->max_commands, &h->transtable->RepQSize);
9272         writel(h->nreply_queues, &h->transtable->RepQCount);
9273         writel(0, &h->transtable->RepQCtrAddrLow32);
9274         writel(0, &h->transtable->RepQCtrAddrHigh32);
9275
9276         for (i = 0; i < h->nreply_queues; i++) {
9277                 writel(0, &h->transtable->RepQAddr[i].upper);
9278                 writel(h->reply_queue[i].busaddr,
9279                         &h->transtable->RepQAddr[i].lower);
9280         }
9281
9282         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9283         writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
9284         /*
9285          * enable outbound interrupt coalescing in accelerator mode;
9286          */
9287         if (trans_support & CFGTBL_Trans_io_accel1) {
9288                 access = SA5_ioaccel_mode1_access;
9289                 writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
9290                 writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9291         } else {
9292                 if (trans_support & CFGTBL_Trans_io_accel2) {
9293                         access = SA5_ioaccel_mode2_access;
9294                         writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
9295                         writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9296                 }
9297         }
9298         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9299         if (hpsa_wait_for_mode_change_ack(h)) {
9300                 dev_err(&h->pdev->dev,
9301                         "performant mode problem - doorbell timeout\n");
9302                 return -ENODEV;
9303         }
9304         register_value = readl(&(h->cfgtable->TransportActive));
9305         if (!(register_value & CFGTBL_Trans_Performant)) {
9306                 dev_err(&h->pdev->dev,
9307                         "performant mode problem - transport not active\n");
9308                 return -ENODEV;
9309         }
9310         /* Change the access methods to the performant access methods */
9311         h->access = access;
9312         h->transMethod = transMethod;
9313
9314         if (!((trans_support & CFGTBL_Trans_io_accel1) ||
9315                 (trans_support & CFGTBL_Trans_io_accel2)))
9316                 return 0;
9317
9318         if (trans_support & CFGTBL_Trans_io_accel1) {
9319                 /* Set up I/O accelerator mode */
9320                 for (i = 0; i < h->nreply_queues; i++) {
9321                         writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
9322                         h->reply_queue[i].current_entry =
9323                                 readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
9324                 }
9325                 bft[7] = h->ioaccel_maxsg + 8;
9326                 calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
9327                                 h->ioaccel1_blockFetchTable);
9328
9329                 /* initialize all reply queue entries to unused */
9330                 for (i = 0; i < h->nreply_queues; i++)
9331                         memset(h->reply_queue[i].head,
9332                                 (u8) IOACCEL_MODE1_REPLY_UNUSED,
9333                                 h->reply_queue_size);
9334
9335                 /* set all the constant fields in the accelerator command
9336                  * frames once at init time to save CPU cycles later.
9337                  */
9338                 for (i = 0; i < h->nr_cmds; i++) {
9339                         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];
9340
9341                         cp->function = IOACCEL1_FUNCTION_SCSIIO;
9342                         cp->err_info = (u32) (h->errinfo_pool_dhandle +
9343                                         (i * sizeof(struct ErrorInfo)));
9344                         cp->err_info_len = sizeof(struct ErrorInfo);
9345                         cp->sgl_offset = IOACCEL1_SGLOFFSET;
9346                         cp->host_context_flags =
9347                                 cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9348                         cp->timeout_sec = 0;
9349                         cp->ReplyQueue = 0;
9350                         cp->tag =
9351                                 cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9352                         cp->host_addr =
9353                                 cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9354                                         (i * sizeof(struct io_accel1_cmd)));
9355                 }
9356         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9357                 u64 cfg_offset, cfg_base_addr_index;
9358                 u32 bft2_offset, cfg_base_addr;
9359                 int rc;
9360
9361                 rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
9362                         &cfg_base_addr_index, &cfg_offset);
9363                 BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
9364                 bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
9365                 calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
9366                                 4, h->ioaccel2_blockFetchTable);
9367                 bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
9368                 BUILD_BUG_ON(offsetof(struct CfgTable,
9369                                 io_accel_request_size_offset) != 0xb8);
9370                 h->ioaccel2_bft2_regs =
9371                         remap_pci_mem(pci_resource_start(h->pdev,
9372                                         cfg_base_addr_index) +
9373                                         cfg_offset + bft2_offset,
9374                                         ARRAY_SIZE(bft2) *
9375                                         sizeof(*h->ioaccel2_bft2_regs));
9376                 for (i = 0; i < ARRAY_SIZE(bft2); i++)
9377                         writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
9378         }
9379         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9380         if (hpsa_wait_for_mode_change_ack(h)) {
9381                 dev_err(&h->pdev->dev,
9382                         "performant mode problem - enabling ioaccel mode\n");
9383                 return -ENODEV;
9384         }
9385         return 0;
9386 }
9387
9388 /* Free ioaccel1 mode command blocks and block fetch table */
9389 static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9390 {
9391         if (h->ioaccel_cmd_pool) {
9392                 pci_free_consistent(h->pdev,
9393                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9394                         h->ioaccel_cmd_pool,
9395                         h->ioaccel_cmd_pool_dhandle);
9396                 h->ioaccel_cmd_pool = NULL;
9397                 h->ioaccel_cmd_pool_dhandle = 0;
9398         }
9399         kfree(h->ioaccel1_blockFetchTable);
9400         h->ioaccel1_blockFetchTable = NULL;
9401 }
9402
9403 /* Allocate ioaccel1 mode command blocks and block fetch table */
9404 static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9405 {
9406         h->ioaccel_maxsg =
9407                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9408         if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
9409                 h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;
9410
9411         /* Command structures must be aligned on a 128-byte boundary
9412          * because the 7 lower bits of the address are used by the
9413          * hardware.
9414          */
9415         BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
9416                         IOACCEL1_COMMANDLIST_ALIGNMENT);
9417         h->ioaccel_cmd_pool =
9418                 pci_alloc_consistent(h->pdev,
9419                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9420                         &(h->ioaccel_cmd_pool_dhandle));
9421
9422         h->ioaccel1_blockFetchTable =
9423                 kmalloc(((h->ioaccel_maxsg + 1) *
9424                                 sizeof(u32)), GFP_KERNEL);
9425
9426         if ((h->ioaccel_cmd_pool == NULL) ||
9427                 (h->ioaccel1_blockFetchTable == NULL))
9428                 goto clean_up;
9429
9430         memset(h->ioaccel_cmd_pool, 0,
9431                 h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
9432         return 0;
9433
9434 clean_up:
9435         hpsa_free_ioaccel1_cmd_and_bft(h);
9436         return -ENOMEM;
9437 }
9438
9439 /* Free ioaccel2 mode command blocks and block fetch table */
9440 static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9441 {
9442         hpsa_free_ioaccel2_sg_chain_blocks(h);
9443
9444         if (h->ioaccel2_cmd_pool) {
9445                 pci_free_consistent(h->pdev,
9446                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9447                         h->ioaccel2_cmd_pool,
9448                         h->ioaccel2_cmd_pool_dhandle);
9449                 h->ioaccel2_cmd_pool = NULL;
9450                 h->ioaccel2_cmd_pool_dhandle = 0;
9451         }
9452         kfree(h->ioaccel2_blockFetchTable);
9453         h->ioaccel2_blockFetchTable = NULL;
9454 }
9455
9456 /* Allocate ioaccel2 mode command blocks and block fetch table */
9457 static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9458 {
9459         int rc;
9460
9461         /* Allocate ioaccel2 mode command blocks and block fetch table */
9462
9463         h->ioaccel_maxsg =
9464                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9465         if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
9466                 h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;
9467
9468         BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
9469                         IOACCEL2_COMMANDLIST_ALIGNMENT);
9470         h->ioaccel2_cmd_pool =
9471                 pci_alloc_consistent(h->pdev,
9472                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9473                         &(h->ioaccel2_cmd_pool_dhandle));
9474
9475         h->ioaccel2_blockFetchTable =
9476                 kmalloc(((h->ioaccel_maxsg + 1) *
9477                                 sizeof(u32)), GFP_KERNEL);
9478
9479         if ((h->ioaccel2_cmd_pool == NULL) ||
9480                 (h->ioaccel2_blockFetchTable == NULL)) {
9481                 rc = -ENOMEM;
9482                 goto clean_up;
9483         }
9484
9485         rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
9486         if (rc)
9487                 goto clean_up;
9488
9489         memset(h->ioaccel2_cmd_pool, 0,
9490                 h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
9491         return 0;
9492
9493 clean_up:
9494         hpsa_free_ioaccel2_cmd_and_bft(h);
9495         return rc;
9496 }
9497
9498 /* Free items allocated by hpsa_put_ctlr_into_performant_mode */
9499 static void hpsa_free_performant_mode(struct ctlr_info *h)
9500 {
9501         kfree(h->blockFetchTable);
9502         h->blockFetchTable = NULL;
9503         hpsa_free_reply_queues(h);
9504         hpsa_free_ioaccel1_cmd_and_bft(h);
9505         hpsa_free_ioaccel2_cmd_and_bft(h);
9506 }
9507
9508 /* return -ENODEV on error, 0 on success (or no action)
9509  * allocates numerous items that must be freed later
9510  */
9511 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
9512 {
9513         u32 trans_support;
9514         unsigned long transMethod = CFGTBL_Trans_Performant |
9515                                         CFGTBL_Trans_use_short_tags;
9516         int i, rc;
9517
9518         if (hpsa_simple_mode)
9519                 return 0;
9520
9521         trans_support = readl(&(h->cfgtable->TransportSupport));
9522         if (!(trans_support & PERFORMANT_MODE))
9523                 return 0;
9524
9525         /* Check for I/O accelerator mode support */
9526         if (trans_support & CFGTBL_Trans_io_accel1) {
9527                 transMethod |= CFGTBL_Trans_io_accel1 |
9528                                 CFGTBL_Trans_enable_directed_msix;
9529                 rc = hpsa_alloc_ioaccel1_cmd_and_bft(h);
9530                 if (rc)
9531                         return rc;
9532         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9533                 transMethod |= CFGTBL_Trans_io_accel2 |
9534                                 CFGTBL_Trans_enable_directed_msix;
9535                 rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
9536                 if (rc)
9537                         return rc;
9538         }
9539
9540         h->nreply_queues = h->msix_vector > 0 ? h->msix_vector : 1;
9541         hpsa_get_max_perf_mode_cmds(h);
9542         /* Performant mode ring buffer and supporting data structures */
9543         h->reply_queue_size = h->max_commands * sizeof(u64);
9544
9545         for (i = 0; i < h->nreply_queues; i++) {
9546                 h->reply_queue[i].head = pci_alloc_consistent(h->pdev,
9547                                                 h->reply_queue_size,
9548                                                 &(h->reply_queue[i].busaddr));
9549                 if (!h->reply_queue[i].head) {
9550                         rc = -ENOMEM;
9551                         goto clean1;    /* rq, ioaccel */
9552                 }
9553                 h->reply_queue[i].size = h->max_commands;
9554                 h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
9555                 h->reply_queue[i].current_entry = 0;
9556         }
9557
9558         /* Need a block fetch table for performant mode */
9559         h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9560                                 sizeof(u32)), GFP_KERNEL);
9561         if (!h->blockFetchTable) {
9562                 rc = -ENOMEM;
9563                 goto clean1;    /* rq, ioaccel */
9564         }
9565
9566         rc = hpsa_enter_performant_mode(h, trans_support);
9567         if (rc)
9568                 goto clean2;    /* bft, rq, ioaccel */
9569         return 0;
9570
9571 clean2: /* bft, rq, ioaccel */
9572         kfree(h->blockFetchTable);
9573         h->blockFetchTable = NULL;
9574 clean1: /* rq, ioaccel */
9575         hpsa_free_reply_queues(h);
9576         hpsa_free_ioaccel1_cmd_and_bft(h);
9577         hpsa_free_ioaccel2_cmd_and_bft(h);
9578         return rc;
9579 }
9580
9581 static int is_accelerated_cmd(struct CommandList *c)
9582 {
9583         return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
9584 }
9585
9586 static void hpsa_drain_accel_commands(struct ctlr_info *h)
9587 {
9588         struct CommandList *c = NULL;
9589         int i, accel_cmds_out;
9590         int refcount;
9591
9592         do { /* wait for all outstanding ioaccel commands to drain out */
9593                 accel_cmds_out = 0;
9594                 for (i = 0; i < h->nr_cmds; i++) {
9595                         c = h->cmd_pool + i;
9596                         refcount = atomic_inc_return(&c->refcount);
9597                         if (refcount > 1) /* Command is allocated */
9598                                 accel_cmds_out += is_accelerated_cmd(c);
9599                         cmd_free(h, c);
9600                 }
9601                 if (accel_cmds_out <= 0)
9602                         break;
9603                 msleep(100);
9604         } while (1);
9605 }
9606
9607 static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
9608                                 struct hpsa_sas_port *hpsa_sas_port)
9609 {
9610         struct hpsa_sas_phy *hpsa_sas_phy;
9611         struct sas_phy *phy;
9612
9613         hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
9614         if (!hpsa_sas_phy)
9615                 return NULL;
9616
9617         phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
9618                 hpsa_sas_port->next_phy_index);
9619         if (!phy) {
9620                 kfree(hpsa_sas_phy);
9621                 return NULL;
9622         }
9623
9624         hpsa_sas_port->next_phy_index++;
9625         hpsa_sas_phy->phy = phy;
9626         hpsa_sas_phy->parent_port = hpsa_sas_port;
9627
9628         return hpsa_sas_phy;
9629 }
9630
9631 static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9632 {
9633         struct sas_phy *phy = hpsa_sas_phy->phy;
9634
9635         sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
9636         if (hpsa_sas_phy->added_to_port)
9637                 list_del(&hpsa_sas_phy->phy_list_entry);
9638         sas_phy_delete(phy);
9639         kfree(hpsa_sas_phy);
9640 }
9641
9642 static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9643 {
9644         int rc;
9645         struct hpsa_sas_port *hpsa_sas_port;
9646         struct sas_phy *phy;
9647         struct sas_identify *identify;
9648
9649         hpsa_sas_port = hpsa_sas_phy->parent_port;
9650         phy = hpsa_sas_phy->phy;
9651
9652         identify = &phy->identify;
9653         memset(identify, 0, sizeof(*identify));
9654         identify->sas_address = hpsa_sas_port->sas_address;
9655         identify->device_type = SAS_END_DEVICE;
9656         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9657         identify->target_port_protocols = SAS_PROTOCOL_STP;
9658         phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9659         phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9660         phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
9661         phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
9662         phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
9663
9664         rc = sas_phy_add(hpsa_sas_phy->phy);
9665         if (rc)
9666                 return rc;
9667
9668         sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
9669         list_add_tail(&hpsa_sas_phy->phy_list_entry,
9670                         &hpsa_sas_port->phy_list_head);
9671         hpsa_sas_phy->added_to_port = true;
9672
9673         return 0;
9674 }
9675
9676 static int
9677         hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
9678                                 struct sas_rphy *rphy)
9679 {
9680         struct sas_identify *identify;
9681
9682         identify = &rphy->identify;
9683         identify->sas_address = hpsa_sas_port->sas_address;
9684         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9685         identify->target_port_protocols = SAS_PROTOCOL_STP;
9686
9687         return sas_rphy_add(rphy);
9688 }
9689
9690 static struct hpsa_sas_port
9691         *hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
9692                                 u64 sas_address)
9693 {
9694         int rc;
9695         struct hpsa_sas_port *hpsa_sas_port;
9696         struct sas_port *port;
9697
9698         hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
9699         if (!hpsa_sas_port)
9700                 return NULL;
9701
9702         INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
9703         hpsa_sas_port->parent_node = hpsa_sas_node;
9704
9705         port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
9706         if (!port)
9707                 goto free_hpsa_port;
9708
9709         rc = sas_port_add(port);
9710         if (rc)
9711                 goto free_sas_port;
9712
9713         hpsa_sas_port->port = port;
9714         hpsa_sas_port->sas_address = sas_address;
9715         list_add_tail(&hpsa_sas_port->port_list_entry,
9716                         &hpsa_sas_node->port_list_head);
9717
9718         return hpsa_sas_port;
9719
9720 free_sas_port:
9721         sas_port_free(port);
9722 free_hpsa_port:
9723         kfree(hpsa_sas_port);
9724
9725         return NULL;
9726 }
9727
9728 static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
9729 {
9730         struct hpsa_sas_phy *hpsa_sas_phy;
9731         struct hpsa_sas_phy *next;
9732
9733         list_for_each_entry_safe(hpsa_sas_phy, next,
9734                         &hpsa_sas_port->phy_list_head, phy_list_entry)
9735                 hpsa_free_sas_phy(hpsa_sas_phy);
9736
9737         sas_port_delete(hpsa_sas_port->port);
9738         list_del(&hpsa_sas_port->port_list_entry);
9739         kfree(hpsa_sas_port);
9740 }
9741
9742 static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
9743 {
9744         struct hpsa_sas_node *hpsa_sas_node;
9745
9746         hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
9747         if (hpsa_sas_node) {
9748                 hpsa_sas_node->parent_dev = parent_dev;
9749                 INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
9750         }
9751
9752         return hpsa_sas_node;
9753 }
9754
9755 static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
9756 {
9757         struct hpsa_sas_port *hpsa_sas_port;
9758         struct hpsa_sas_port *next;
9759
9760         if (!hpsa_sas_node)
9761                 return;
9762
9763         list_for_each_entry_safe(hpsa_sas_port, next,
9764                         &hpsa_sas_node->port_list_head, port_list_entry)
9765                 hpsa_free_sas_port(hpsa_sas_port);
9766
9767         kfree(hpsa_sas_node);
9768 }
9769
9770 static struct hpsa_scsi_dev_t
9771         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
9772                                         struct sas_rphy *rphy)
9773 {
9774         int i;
9775         struct hpsa_scsi_dev_t *device;
9776
9777         for (i = 0; i < h->ndevices; i++) {
9778                 device = h->dev[i];
9779                 if (!device->sas_port)
9780                         continue;
9781                 if (device->sas_port->rphy == rphy)
9782                         return device;
9783         }
9784
9785         return NULL;
9786 }
9787
9788 static int hpsa_add_sas_host(struct ctlr_info *h)
9789 {
9790         int rc;
9791         struct device *parent_dev;
9792         struct hpsa_sas_node *hpsa_sas_node;
9793         struct hpsa_sas_port *hpsa_sas_port;
9794         struct hpsa_sas_phy *hpsa_sas_phy;
9795
9796         parent_dev = &h->scsi_host->shost_gendev;
9797
9798         hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
9799         if (!hpsa_sas_node)
9800                 return -ENOMEM;
9801
9802         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
9803         if (!hpsa_sas_port) {
9804                 rc = -ENODEV;
9805                 goto free_sas_node;
9806         }
9807
9808         hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
9809         if (!hpsa_sas_phy) {
9810                 rc = -ENODEV;
9811                 goto free_sas_port;
9812         }
9813
9814         rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
9815         if (rc)
9816                 goto free_sas_phy;
9817
9818         h->sas_host = hpsa_sas_node;
9819
9820         return 0;
9821
9822 free_sas_phy:
9823         hpsa_free_sas_phy(hpsa_sas_phy);
9824 free_sas_port:
9825         hpsa_free_sas_port(hpsa_sas_port);
9826 free_sas_node:
9827         hpsa_free_sas_node(hpsa_sas_node);
9828
9829         return rc;
9830 }
9831
9832 static void hpsa_delete_sas_host(struct ctlr_info *h)
9833 {
9834         hpsa_free_sas_node(h->sas_host);
9835 }
9836
9837 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
9838                                 struct hpsa_scsi_dev_t *device)
9839 {
9840         int rc;
9841         struct hpsa_sas_port *hpsa_sas_port;
9842         struct sas_rphy *rphy;
9843
9844         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
9845         if (!hpsa_sas_port)
9846                 return -ENOMEM;
9847
9848         rphy = sas_end_device_alloc(hpsa_sas_port->port);
9849         if (!rphy) {
9850                 rc = -ENODEV;
9851                 goto free_sas_port;
9852         }
9853
9854         hpsa_sas_port->rphy = rphy;
9855         device->sas_port = hpsa_sas_port;
9856
9857         rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
9858         if (rc)
9859                 goto free_sas_port;
9860
9861         return 0;
9862
9863 free_sas_port:
9864         hpsa_free_sas_port(hpsa_sas_port);
9865         device->sas_port = NULL;
9866
9867         return rc;
9868 }
9869
9870 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
9871 {
9872         if (device->sas_port) {
9873                 hpsa_free_sas_port(device->sas_port);
9874                 device->sas_port = NULL;
9875         }
9876 }
9877
9878 static int
9879 hpsa_sas_get_linkerrors(struct sas_phy *phy)
9880 {
9881         return 0;
9882 }
9883
9884 static int
9885 hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
9886 {
9887         *identifier = 0;
9888         return 0;
9889 }
9890
9891 static int
9892 hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
9893 {
9894         return -ENXIO;
9895 }
9896
9897 static int
9898 hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
9899 {
9900         return 0;
9901 }
9902
9903 static int
9904 hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
9905 {
9906         return 0;
9907 }
9908
9909 static int
9910 hpsa_sas_phy_setup(struct sas_phy *phy)
9911 {
9912         return 0;
9913 }
9914
9915 static void
9916 hpsa_sas_phy_release(struct sas_phy *phy)
9917 {
9918 }
9919
9920 static int
9921 hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
9922 {
9923         return -EINVAL;
9924 }
9925
9926 /* SMP = Serial Management Protocol */
9927 static int
9928 hpsa_sas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
9929 struct request *req)
9930 {
9931         return -EINVAL;
9932 }
9933
9934 static struct sas_function_template hpsa_sas_transport_functions = {
9935         .get_linkerrors = hpsa_sas_get_linkerrors,
9936         .get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
9937         .get_bay_identifier = hpsa_sas_get_bay_identifier,
9938         .phy_reset = hpsa_sas_phy_reset,
9939         .phy_enable = hpsa_sas_phy_enable,
9940         .phy_setup = hpsa_sas_phy_setup,
9941         .phy_release = hpsa_sas_phy_release,
9942         .set_phy_speed = hpsa_sas_phy_speed,
9943         .smp_handler = hpsa_sas_smp_handler,
9944 };
9945
9946 /*
9947  *  This is it.  Register the PCI driver information for the cards we control
9948  *  the OS will call our registered routines when it finds one of our cards.
9949  */
9950 static int __init hpsa_init(void)
9951 {
9952         int rc;
9953
9954         hpsa_sas_transport_template =
9955                 sas_attach_transport(&hpsa_sas_transport_functions);
9956         if (!hpsa_sas_transport_template)
9957                 return -ENODEV;
9958
9959         rc = pci_register_driver(&hpsa_pci_driver);
9960
9961         if (rc)
9962                 sas_release_transport(hpsa_sas_transport_template);
9963
9964         return rc;
9965 }
9966
9967 static void __exit hpsa_cleanup(void)
9968 {
9969         pci_unregister_driver(&hpsa_pci_driver);
9970         sas_release_transport(hpsa_sas_transport_template);
9971 }
9972
9973 static void __attribute__((unused)) verify_offsets(void)
9974 {
9975 #define VERIFY_OFFSET(member, offset) \
9976         BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)
9977
9978         VERIFY_OFFSET(structure_size, 0);
9979         VERIFY_OFFSET(volume_blk_size, 4);
9980         VERIFY_OFFSET(volume_blk_cnt, 8);
9981         VERIFY_OFFSET(phys_blk_shift, 16);
9982         VERIFY_OFFSET(parity_rotation_shift, 17);
9983         VERIFY_OFFSET(strip_size, 18);
9984         VERIFY_OFFSET(disk_starting_blk, 20);
9985         VERIFY_OFFSET(disk_blk_cnt, 28);
9986         VERIFY_OFFSET(data_disks_per_row, 36);
9987         VERIFY_OFFSET(metadata_disks_per_row, 38);
9988         VERIFY_OFFSET(row_cnt, 40);
9989         VERIFY_OFFSET(layout_map_count, 42);
9990         VERIFY_OFFSET(flags, 44);
9991         VERIFY_OFFSET(dekindex, 46);
9992         /* VERIFY_OFFSET(reserved, 48 */
9993         VERIFY_OFFSET(data, 64);
9994
9995 #undef VERIFY_OFFSET
9996
9997 #define VERIFY_OFFSET(member, offset) \
9998         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)
9999
10000         VERIFY_OFFSET(IU_type, 0);
10001         VERIFY_OFFSET(direction, 1);
10002         VERIFY_OFFSET(reply_queue, 2);
10003         /* VERIFY_OFFSET(reserved1, 3);  */
10004         VERIFY_OFFSET(scsi_nexus, 4);
10005         VERIFY_OFFSET(Tag, 8);
10006         VERIFY_OFFSET(cdb, 16);
10007         VERIFY_OFFSET(cciss_lun, 32);
10008         VERIFY_OFFSET(data_len, 40);
10009         VERIFY_OFFSET(cmd_priority_task_attr, 44);
10010         VERIFY_OFFSET(sg_count, 45);
10011         /* VERIFY_OFFSET(reserved3 */
10012         VERIFY_OFFSET(err_ptr, 48);
10013         VERIFY_OFFSET(err_len, 56);
10014         /* VERIFY_OFFSET(reserved4  */
10015         VERIFY_OFFSET(sg, 64);
10016
10017 #undef VERIFY_OFFSET
10018
10019 #define VERIFY_OFFSET(member, offset) \
10020         BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)
10021
10022         VERIFY_OFFSET(dev_handle, 0x00);
10023         VERIFY_OFFSET(reserved1, 0x02);
10024         VERIFY_OFFSET(function, 0x03);
10025         VERIFY_OFFSET(reserved2, 0x04);
10026         VERIFY_OFFSET(err_info, 0x0C);
10027         VERIFY_OFFSET(reserved3, 0x10);
10028         VERIFY_OFFSET(err_info_len, 0x12);
10029         VERIFY_OFFSET(reserved4, 0x13);
10030         VERIFY_OFFSET(sgl_offset, 0x14);
10031         VERIFY_OFFSET(reserved5, 0x15);
10032         VERIFY_OFFSET(transfer_len, 0x1C);
10033         VERIFY_OFFSET(reserved6, 0x20);
10034         VERIFY_OFFSET(io_flags, 0x24);
10035         VERIFY_OFFSET(reserved7, 0x26);
10036         VERIFY_OFFSET(LUN, 0x34);
10037         VERIFY_OFFSET(control, 0x3C);
10038         VERIFY_OFFSET(CDB, 0x40);
10039         VERIFY_OFFSET(reserved8, 0x50);
10040         VERIFY_OFFSET(host_context_flags, 0x60);
10041         VERIFY_OFFSET(timeout_sec, 0x62);
10042         VERIFY_OFFSET(ReplyQueue, 0x64);
10043         VERIFY_OFFSET(reserved9, 0x65);
10044         VERIFY_OFFSET(tag, 0x68);
10045         VERIFY_OFFSET(host_addr, 0x70);
10046         VERIFY_OFFSET(CISS_LUN, 0x78);
10047         VERIFY_OFFSET(SG, 0x78 + 8);
10048 #undef VERIFY_OFFSET
10049 }
10050
10051 module_init(hpsa_init);
10052 module_exit(hpsa_cleanup);