drivers/scsi/smartpqi/smartpqi_init.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    driver for Microsemi PQI-based storage controllers
   4  *    Copyright (c) 2019 Microchip Technology Inc. and its subsidiaries
   5  *    Copyright (c) 2016-2018 Microsemi Corporation
   6  *    Copyright (c) 2016 PMC-Sierra, Inc.
   7  *
   8  *    Questions/Comments/Bugfixes to storagedev@microchip.com
   9  *
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/delay.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/sched.h>
  18 #include <linux/rtc.h>
  19 #include <linux/bcd.h>
  20 #include <linux/reboot.h>
  21 #include <linux/cciss_ioctl.h>
  22 #include <linux/blk-mq-pci.h>
  23 #include <scsi/scsi_host.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_eh.h>
  27 #include <scsi/scsi_transport_sas.h>
  28 #include <asm/unaligned.h>
  29 #include "smartpqi.h"
  30 #include "smartpqi_sis.h"
  31
  32 #if !defined(BUILD_TIMESTAMP)
  33 #define BUILD_TIMESTAMP
  34 #endif
  35
  36 #define DRIVER_VERSION          "1.2.8-026"
  37 #define DRIVER_MAJOR            1
  38 #define DRIVER_MINOR            2
  39 #define DRIVER_RELEASE          8
  40 #define DRIVER_REVISION         26
  41
  42 #define DRIVER_NAME             "Microsemi PQI Driver (v" \
  43                                 DRIVER_VERSION BUILD_TIMESTAMP ")"
  44 #define DRIVER_NAME_SHORT       "smartpqi"
  45
  46 #define PQI_EXTRA_SGL_MEMORY    (12 * sizeof(struct pqi_sg_descriptor))
  47
  48 MODULE_AUTHOR("Microsemi");
  49 MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version "
  50         DRIVER_VERSION);
  51 MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers");
  52 MODULE_VERSION(DRIVER_VERSION);
  53 MODULE_LICENSE("GPL");
  54
  55 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info);
  56 static void pqi_ctrl_offline_worker(struct work_struct *work);
  57 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info);
  58 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info);
  59 static void pqi_scan_start(struct Scsi_Host *shost);
  60 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
  61         struct pqi_queue_group *queue_group, enum pqi_io_path path,
  62         struct pqi_io_request *io_request);
  63 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
  64         struct pqi_iu_header *request, unsigned int flags,
  65         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs);
  66 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
  67         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
  68         unsigned int cdb_length, struct pqi_queue_group *queue_group,
  69         struct pqi_encryption_info *encryption_info, bool raid_bypass);
  70 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
  71 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
  72 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info);
  73 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
  74         u32 bytes_requested);
  75 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info);
  76 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info);
  77 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
  78         struct pqi_scsi_dev *device, unsigned long timeout_secs);
  79
  80 /* for flags argument to pqi_submit_raid_request_synchronous() */
  81 #define PQI_SYNC_FLAGS_INTERRUPTABLE    0x1
  82
  83 static struct scsi_transport_template *pqi_sas_transport_template;
  84
  85 static atomic_t pqi_controller_count = ATOMIC_INIT(0);
  86
  87 enum pqi_lockup_action {
  88         NONE,
  89         REBOOT,
  90         PANIC
  91 };
  92
  93 static enum pqi_lockup_action pqi_lockup_action = NONE;
  94
  95 static struct {
  96         enum pqi_lockup_action  action;
  97         char                    *name;
  98 } pqi_lockup_actions[] = {
  99         {
 100                 .action = NONE,
 101                 .name = "none",
 102         },
 103         {
 104                 .action = REBOOT,
 105                 .name = "reboot",
 106         },
 107         {
 108                 .action = PANIC,
 109                 .name = "panic",
 110         },
 111 };
 112
 113 static unsigned int pqi_supported_event_types[] = {
 114         PQI_EVENT_TYPE_HOTPLUG,
 115         PQI_EVENT_TYPE_HARDWARE,
 116         PQI_EVENT_TYPE_PHYSICAL_DEVICE,
 117         PQI_EVENT_TYPE_LOGICAL_DEVICE,
 118         PQI_EVENT_TYPE_OFA,
 119         PQI_EVENT_TYPE_AIO_STATE_CHANGE,
 120         PQI_EVENT_TYPE_AIO_CONFIG_CHANGE,
 121 };
 122
 123 static int pqi_disable_device_id_wildcards;
 124 module_param_named(disable_device_id_wildcards,
 125         pqi_disable_device_id_wildcards, int, 0644);
 126 MODULE_PARM_DESC(disable_device_id_wildcards,
 127         "Disable device ID wildcards.");
 128
 129 static int pqi_disable_heartbeat;
 130 module_param_named(disable_heartbeat,
 131         pqi_disable_heartbeat, int, 0644);
 132 MODULE_PARM_DESC(disable_heartbeat,
 133         "Disable heartbeat.");
 134
 135 static int pqi_disable_ctrl_shutdown;
 136 module_param_named(disable_ctrl_shutdown,
 137         pqi_disable_ctrl_shutdown, int, 0644);
 138 MODULE_PARM_DESC(disable_ctrl_shutdown,
 139         "Disable controller shutdown when controller locked up.");
 140
 141 static char *pqi_lockup_action_param;
 142 module_param_named(lockup_action,
 143         pqi_lockup_action_param, charp, 0644);
 144 MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n"
 145         "\t\tSupported: none, reboot, panic\n"
 146         "\t\tDefault: none");
 147
 148 static int pqi_expose_ld_first;
 149 module_param_named(expose_ld_first,
 150         pqi_expose_ld_first, int, 0644);
 151 MODULE_PARM_DESC(expose_ld_first,
 152         "Expose logical drives before physical drives.");
 153
 154 static int pqi_hide_vsep;
 155 module_param_named(hide_vsep,
 156         pqi_hide_vsep, int, 0644);
 157 MODULE_PARM_DESC(hide_vsep,
 158         "Hide the virtual SEP for direct attached drives.");
 159
 160 static char *raid_levels[] = {
 161         "RAID-0",
 162         "RAID-4",
 163         "RAID-1(1+0)",
 164         "RAID-5",
 165         "RAID-5+1",
 166         "RAID-ADG",
 167         "RAID-1(ADM)",
 168 };
 169
 170 static char *pqi_raid_level_to_string(u8 raid_level)
 171 {
 172         if (raid_level < ARRAY_SIZE(raid_levels))
 173                 return raid_levels[raid_level];
 174
 175         return "RAID UNKNOWN";
 176 }
 177
 178 #define SA_RAID_0               0
 179 #define SA_RAID_4               1
 180 #define SA_RAID_1               2       /* also used for RAID 10 */
 181 #define SA_RAID_5               3       /* also used for RAID 50 */
 182 #define SA_RAID_51              4
 183 #define SA_RAID_6               5       /* also used for RAID 60 */
 184 #define SA_RAID_ADM             6       /* also used for RAID 1+0 ADM */
 185 #define SA_RAID_MAX             SA_RAID_ADM
 186 #define SA_RAID_UNKNOWN         0xff
 187
 188 static inline void pqi_scsi_done(struct scsi_cmnd *scmd)
 189 {
 190         pqi_prep_for_scsi_done(scmd);
 191         scmd->scsi_done(scmd);
 192 }
 193
 194 static inline void pqi_disable_write_same(struct scsi_device *sdev)
 195 {
 196         sdev->no_write_same = 1;
 197 }
 198
 199 static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
 200 {
 201         return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
 202 }
 203
 204 static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
 205 {
 206         return !device->is_physical_device;
 207 }
 208
 209 static inline bool pqi_is_external_raid_addr(u8 *scsi3addr)
 210 {
 211         return scsi3addr[2] != 0;
 212 }
 213
 214 static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info)
 215 {
 216         if (ctrl_info->controller_online)
 217                 if (!sis_is_firmware_running(ctrl_info))
 218                         pqi_take_ctrl_offline(ctrl_info);
 219 }
 220
 221 static inline bool pqi_is_hba_lunid(u8 *scsi3addr)
 222 {
 223         return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID);
 224 }
 225
 226 static inline enum pqi_ctrl_mode pqi_get_ctrl_mode(
 227         struct pqi_ctrl_info *ctrl_info)
 228 {
 229         return sis_read_driver_scratch(ctrl_info);
 230 }
 231
 232 static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info,
 233         enum pqi_ctrl_mode mode)
 234 {
 235         sis_write_driver_scratch(ctrl_info, mode);
 236 }
 237
 238 static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info)
 239 {
 240         ctrl_info->block_requests = true;
 241         scsi_block_requests(ctrl_info->scsi_host);
 242 }
 243
 244 static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info)
 245 {
 246         ctrl_info->block_requests = false;
 247         wake_up_all(&ctrl_info->block_requests_wait);
 248         pqi_retry_raid_bypass_requests(ctrl_info);
 249         scsi_unblock_requests(ctrl_info->scsi_host);
 250 }
 251
 252 static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info)
 253 {
 254         ctrl_info->block_device_reset = true;
 255 }
 256
 257 static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info,
 258         unsigned long timeout_msecs)
 259 {
 260         unsigned long remaining_msecs;
 261
 262         if (!pqi_ctrl_blocked(ctrl_info))
 263                 return timeout_msecs;
 264
 265         atomic_inc(&ctrl_info->num_blocked_threads);
 266
 267         if (timeout_msecs == NO_TIMEOUT) {
 268                 wait_event(ctrl_info->block_requests_wait,
 269                         !pqi_ctrl_blocked(ctrl_info));
 270                 remaining_msecs = timeout_msecs;
 271         } else {
 272                 unsigned long remaining_jiffies;
 273
 274                 remaining_jiffies =
 275                         wait_event_timeout(ctrl_info->block_requests_wait,
 276                                 !pqi_ctrl_blocked(ctrl_info),
 277                                 msecs_to_jiffies(timeout_msecs));
 278                 remaining_msecs = jiffies_to_msecs(remaining_jiffies);
 279         }
 280
 281         atomic_dec(&ctrl_info->num_blocked_threads);
 282
 283         return remaining_msecs;
 284 }
 285
 286 static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info)
 287 {
 288         while (atomic_read(&ctrl_info->num_busy_threads) >
 289                 atomic_read(&ctrl_info->num_blocked_threads))
 290                 usleep_range(1000, 2000);
 291 }
 292
 293 static inline bool pqi_device_offline(struct pqi_scsi_dev *device)
 294 {
 295         return device->device_offline;
 296 }
 297
 298 static inline void pqi_device_reset_start(struct pqi_scsi_dev *device)
 299 {
 300         device->in_reset = true;
 301 }
 302
 303 static inline void pqi_device_reset_done(struct pqi_scsi_dev *device)
 304 {
 305         device->in_reset = false;
 306 }
 307
 308 static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device)
 309 {
 310         return device->in_reset;
 311 }
 312
 313 static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info)
 314 {
 315         ctrl_info->in_ofa = true;
 316 }
 317
 318 static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info)
 319 {
 320         ctrl_info->in_ofa = false;
 321 }
 322
 323 static inline bool pqi_ctrl_in_ofa(struct pqi_ctrl_info *ctrl_info)
 324 {
 325         return ctrl_info->in_ofa;
 326 }
 327
 328 static inline void pqi_device_remove_start(struct pqi_scsi_dev *device)
 329 {
 330         device->in_remove = true;
 331 }
 332
 333 static inline bool pqi_device_in_remove(struct pqi_ctrl_info *ctrl_info,
 334                                         struct pqi_scsi_dev *device)
 335 {
 336         return device->in_remove && !ctrl_info->in_shutdown;
 337 }
 338
 339 static inline void pqi_ctrl_shutdown_start(struct pqi_ctrl_info *ctrl_info)
 340 {
 341         ctrl_info->in_shutdown = true;
 342 }
 343
 344 static inline bool pqi_ctrl_in_shutdown(struct pqi_ctrl_info *ctrl_info)
 345 {
 346         return ctrl_info->in_shutdown;
 347 }
 348
 349 static inline void pqi_schedule_rescan_worker_with_delay(
 350         struct pqi_ctrl_info *ctrl_info, unsigned long delay)
 351 {
 352         if (pqi_ctrl_offline(ctrl_info))
 353                 return;
 354         if (pqi_ctrl_in_ofa(ctrl_info))
 355                 return;
 356
 357         schedule_delayed_work(&ctrl_info->rescan_work, delay);
 358 }
 359
 360 static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 361 {
 362         pqi_schedule_rescan_worker_with_delay(ctrl_info, 0);
 363 }
 364
 365 #define PQI_RESCAN_WORK_DELAY   (10 * PQI_HZ)
 366
 367 static inline void pqi_schedule_rescan_worker_delayed(
 368         struct pqi_ctrl_info *ctrl_info)
 369 {
 370         pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY);
 371 }
 372
 373 static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info)
 374 {
 375         cancel_delayed_work_sync(&ctrl_info->rescan_work);
 376 }
 377
 378 static inline void pqi_cancel_event_worker(struct pqi_ctrl_info *ctrl_info)
 379 {
 380         cancel_work_sync(&ctrl_info->event_work);
 381 }
 382
 383 static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info)
 384 {
 385         if (!ctrl_info->heartbeat_counter)
 386                 return 0;
 387
 388         return readl(ctrl_info->heartbeat_counter);
 389 }
 390
 391 static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info)
 392 {
 393         if (!ctrl_info->soft_reset_status)
 394                 return 0;
 395
 396         return readb(ctrl_info->soft_reset_status);
 397 }
 398
 399 static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info,
 400                                                 u8 clear)
 401 {
 402         u8 status;
 403
 404         if (!ctrl_info->soft_reset_status)
 405                 return;
 406
 407         status = pqi_read_soft_reset_status(ctrl_info);
 408         status &= ~clear;
 409         writeb(status, ctrl_info->soft_reset_status);
 410 }
 411
 412 static int pqi_map_single(struct pci_dev *pci_dev,
 413         struct pqi_sg_descriptor *sg_descriptor, void *buffer,
 414         size_t buffer_length, enum dma_data_direction data_direction)
 415 {
 416         dma_addr_t bus_address;
 417
 418         if (!buffer || buffer_length == 0 || data_direction == DMA_NONE)
 419                 return 0;
 420
 421         bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length,
 422                 data_direction);
 423         if (dma_mapping_error(&pci_dev->dev, bus_address))
 424                 return -ENOMEM;
 425
 426         put_unaligned_le64((u64)bus_address, &sg_descriptor->address);
 427         put_unaligned_le32(buffer_length, &sg_descriptor->length);
 428         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
 429
 430         return 0;
 431 }
 432
 433 static void pqi_pci_unmap(struct pci_dev *pci_dev,
 434         struct pqi_sg_descriptor *descriptors, int num_descriptors,
 435         enum dma_data_direction data_direction)
 436 {
 437         int i;
 438
 439         if (data_direction == DMA_NONE)
 440                 return;
 441
 442         for (i = 0; i < num_descriptors; i++)
 443                 dma_unmap_single(&pci_dev->dev,
 444                         (dma_addr_t)get_unaligned_le64(&descriptors[i].address),
 445                         get_unaligned_le32(&descriptors[i].length),
 446                         data_direction);
 447 }
 448
 449 static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 450         struct pqi_raid_path_request *request, u8 cmd,
 451         u8 *scsi3addr, void *buffer, size_t buffer_length,
 452         u16 vpd_page, enum dma_data_direction *dir)
 453 {
 454         u8 *cdb;
 455         size_t cdb_length = buffer_length;
 456
 457         memset(request, 0, sizeof(*request));
 458
 459         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
 460         put_unaligned_le16(offsetof(struct pqi_raid_path_request,
 461                 sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH,
 462                 &request->header.iu_length);
 463         put_unaligned_le32(buffer_length, &request->buffer_length);
 464         memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number));
 465         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
 466         request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
 467
 468         cdb = request->cdb;
 469
 470         switch (cmd) {
 471         case INQUIRY:
 472                 request->data_direction = SOP_READ_FLAG;
 473                 cdb[0] = INQUIRY;
 474                 if (vpd_page & VPD_PAGE) {
 475                         cdb[1] = 0x1;
 476                         cdb[2] = (u8)vpd_page;
 477                 }
 478                 cdb[4] = (u8)cdb_length;
 479                 break;
 480         case CISS_REPORT_LOG:
 481         case CISS_REPORT_PHYS:
 482                 request->data_direction = SOP_READ_FLAG;
 483                 cdb[0] = cmd;
 484                 if (cmd == CISS_REPORT_PHYS)
 485                         cdb[1] = CISS_REPORT_PHYS_EXTENDED;
 486                 else
 487                         cdb[1] = CISS_REPORT_LOG_EXTENDED;
 488                 put_unaligned_be32(cdb_length, &cdb[6]);
 489                 break;
 490         case CISS_GET_RAID_MAP:
 491                 request->data_direction = SOP_READ_FLAG;
 492                 cdb[0] = CISS_READ;
 493                 cdb[1] = CISS_GET_RAID_MAP;
 494                 put_unaligned_be32(cdb_length, &cdb[6]);
 495                 break;
 496         case SA_FLUSH_CACHE:
 497                 request->data_direction = SOP_WRITE_FLAG;
 498                 cdb[0] = BMIC_WRITE;
 499                 cdb[6] = BMIC_FLUSH_CACHE;
 500                 put_unaligned_be16(cdb_length, &cdb[7]);
 501                 break;
 502         case BMIC_SENSE_DIAG_OPTIONS:
 503                 cdb_length = 0;
 504                 /* fall through */
 505         case BMIC_IDENTIFY_CONTROLLER:
 506         case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 507         case BMIC_SENSE_SUBSYSTEM_INFORMATION:
 508                 request->data_direction = SOP_READ_FLAG;
 509                 cdb[0] = BMIC_READ;
 510                 cdb[6] = cmd;
 511                 put_unaligned_be16(cdb_length, &cdb[7]);
 512                 break;
 513         case BMIC_SET_DIAG_OPTIONS:
 514                 cdb_length = 0;
 515                 /* fall through */
 516         case BMIC_WRITE_HOST_WELLNESS:
 517                 request->data_direction = SOP_WRITE_FLAG;
 518                 cdb[0] = BMIC_WRITE;
 519                 cdb[6] = cmd;
 520                 put_unaligned_be16(cdb_length, &cdb[7]);
 521                 break;
 522         case BMIC_CSMI_PASSTHRU:
 523                 request->data_direction = SOP_BIDIRECTIONAL;
 524                 cdb[0] = BMIC_WRITE;
 525                 cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU;
 526                 cdb[6] = cmd;
 527                 put_unaligned_be16(cdb_length, &cdb[7]);
 528                 break;
 529         default:
 530                 dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
 531                         cmd);
 532                 break;
 533         }
 534
 535         switch (request->data_direction) {
 536         case SOP_READ_FLAG:
 537                 *dir = DMA_FROM_DEVICE;
 538                 break;
 539         case SOP_WRITE_FLAG:
 540                 *dir = DMA_TO_DEVICE;
 541                 break;
 542         case SOP_NO_DIRECTION_FLAG:
 543                 *dir = DMA_NONE;
 544                 break;
 545         default:
 546                 *dir = DMA_BIDIRECTIONAL;
 547                 break;
 548         }
 549
 550         return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
 551                 buffer, buffer_length, *dir);
 552 }
 553
 554 static inline void pqi_reinit_io_request(struct pqi_io_request *io_request)
 555 {
 556         io_request->scmd = NULL;
 557         io_request->status = 0;
 558         io_request->error_info = NULL;
 559         io_request->raid_bypass = false;
 560 }
 561
 562 static struct pqi_io_request *pqi_alloc_io_request(
 563         struct pqi_ctrl_info *ctrl_info)
 564 {
 565         struct pqi_io_request *io_request;
 566         u16 i = ctrl_info->next_io_request_slot;        /* benignly racy */
 567
 568         while (1) {
 569                 io_request = &ctrl_info->io_request_pool[i];
 570                 if (atomic_inc_return(&io_request->refcount) == 1)
 571                         break;
 572                 atomic_dec(&io_request->refcount);
 573                 i = (i + 1) % ctrl_info->max_io_slots;
 574         }
 575
 576         /* benignly racy */
 577         ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots;
 578
 579         pqi_reinit_io_request(io_request);
 580
 581         return io_request;
 582 }
 583
 584 static void pqi_free_io_request(struct pqi_io_request *io_request)
 585 {
 586         atomic_dec(&io_request->refcount);
 587 }
 588
 589 static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 590                 u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page,
 591                 struct pqi_raid_error_info *error_info,
 592                 unsigned long timeout_msecs)
 593 {
 594         int rc;
 595         enum dma_data_direction dir;
 596         struct pqi_raid_path_request request;
 597
 598         rc = pqi_build_raid_path_request(ctrl_info, &request,
 599                 cmd, scsi3addr, buffer,
 600                 buffer_length, vpd_page, &dir);
 601         if (rc)
 602                 return rc;
 603
 604         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 605                  0, error_info, timeout_msecs);
 606
 607         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 608         return rc;
 609 }
 610
 611 /* Helper functions for pqi_send_scsi_raid_request */
 612
 613 static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info,
 614                 u8 cmd, void *buffer, size_t buffer_length)
 615 {
 616         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 617                         buffer, buffer_length, 0, NULL, NO_TIMEOUT);
 618 }
 619
 620 static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info,
 621                 u8 cmd, void *buffer, size_t buffer_length,
 622                 struct pqi_raid_error_info *error_info)
 623 {
 624         return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID,
 625                         buffer, buffer_length, 0, error_info, NO_TIMEOUT);
 626 }
 627
 628
 629 static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
 630                 struct bmic_identify_controller *buffer)
 631 {
 632         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER,
 633                         buffer, sizeof(*buffer));
 634 }
 635
 636 static inline int pqi_sense_subsystem_info(struct  pqi_ctrl_info *ctrl_info,
 637                 struct bmic_sense_subsystem_info *sense_info)
 638 {
 639         return pqi_send_ctrl_raid_request(ctrl_info,
 640                         BMIC_SENSE_SUBSYSTEM_INFORMATION,
 641                         sense_info, sizeof(*sense_info));
 642 }
 643
 644 static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
 645         u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
 646 {
 647         return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr,
 648                 buffer, buffer_length, vpd_page, NULL, NO_TIMEOUT);
 649 }
 650
 651 static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info,
 652         struct pqi_scsi_dev *device,
 653         struct bmic_identify_physical_device *buffer,
 654         size_t buffer_length)
 655 {
 656         int rc;
 657         enum dma_data_direction dir;
 658         u16 bmic_device_index;
 659         struct pqi_raid_path_request request;
 660
 661         rc = pqi_build_raid_path_request(ctrl_info, &request,
 662                 BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer,
 663                 buffer_length, 0, &dir);
 664         if (rc)
 665                 return rc;
 666
 667         bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr);
 668         request.cdb[2] = (u8)bmic_device_index;
 669         request.cdb[9] = (u8)(bmic_device_index >> 8);
 670
 671         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
 672                 0, NULL, NO_TIMEOUT);
 673
 674         pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir);
 675         return rc;
 676 }
 677
 678 static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info,
 679         enum bmic_flush_cache_shutdown_event shutdown_event)
 680 {
 681         int rc;
 682         struct bmic_flush_cache *flush_cache;
 683
 684         /*
 685          * Don't bother trying to flush the cache if the controller is
 686          * locked up.
 687          */
 688         if (pqi_ctrl_offline(ctrl_info))
 689                 return -ENXIO;
 690
 691         flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL);
 692         if (!flush_cache)
 693                 return -ENOMEM;
 694
 695         flush_cache->shutdown_event = shutdown_event;
 696
 697         rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache,
 698                 sizeof(*flush_cache));
 699
 700         kfree(flush_cache);
 701
 702         return rc;
 703 }
 704
 705 int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info,
 706         struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length,
 707         struct pqi_raid_error_info *error_info)
 708 {
 709         return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU,
 710                 buffer, buffer_length, error_info);
 711 }
 712
 713 #define PQI_FETCH_PTRAID_DATA (1UL<<31)
 714
 715 static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info)
 716 {
 717         int rc;
 718         struct bmic_diag_options *diag;
 719
 720         diag = kzalloc(sizeof(*diag), GFP_KERNEL);
 721         if (!diag)
 722                 return -ENOMEM;
 723
 724         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS,
 725                                         diag, sizeof(*diag));
 726         if (rc)
 727                 goto out;
 728
 729         diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA);
 730
 731         rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS,
 732                                         diag, sizeof(*diag));
 733 out:
 734         kfree(diag);
 735
 736         return rc;
 737 }
 738
 739 static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
 740         void *buffer, size_t buffer_length)
 741 {
 742         return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS,
 743                                         buffer, buffer_length);
 744 }
 745
 746 #pragma pack(1)
 747
 748 struct bmic_host_wellness_driver_version {
 749         u8      start_tag[4];
 750         u8      driver_version_tag[2];
 751         __le16  driver_version_length;
 752         char    driver_version[32];
 753         u8      dont_write_tag[2];
 754         u8      end_tag[2];
 755 };
 756
 757 #pragma pack()
 758
 759 static int pqi_write_driver_version_to_host_wellness(
 760         struct pqi_ctrl_info *ctrl_info)
 761 {
 762         int rc;
 763         struct bmic_host_wellness_driver_version *buffer;
 764         size_t buffer_length;
 765
 766         buffer_length = sizeof(*buffer);
 767
 768         buffer = kmalloc(buffer_length, GFP_KERNEL);
 769         if (!buffer)
 770                 return -ENOMEM;
 771
 772         buffer->start_tag[0] = '<';
 773         buffer->start_tag[1] = 'H';
 774         buffer->start_tag[2] = 'W';
 775         buffer->start_tag[3] = '>';
 776         buffer->driver_version_tag[0] = 'D';
 777         buffer->driver_version_tag[1] = 'V';
 778         put_unaligned_le16(sizeof(buffer->driver_version),
 779                 &buffer->driver_version_length);
 780         strncpy(buffer->driver_version, "Linux " DRIVER_VERSION,
 781                 sizeof(buffer->driver_version) - 1);
 782         buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
 783         buffer->dont_write_tag[0] = 'D';
 784         buffer->dont_write_tag[1] = 'W';
 785         buffer->end_tag[0] = 'Z';
 786         buffer->end_tag[1] = 'Z';
 787
 788         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 789
 790         kfree(buffer);
 791
 792         return rc;
 793 }
 794
 795 #pragma pack(1)
 796
 797 struct bmic_host_wellness_time {
 798         u8      start_tag[4];
 799         u8      time_tag[2];
 800         __le16  time_length;
 801         u8      time[8];
 802         u8      dont_write_tag[2];
 803         u8      end_tag[2];
 804 };
 805
 806 #pragma pack()
 807
 808 static int pqi_write_current_time_to_host_wellness(
 809         struct pqi_ctrl_info *ctrl_info)
 810 {
 811         int rc;
 812         struct bmic_host_wellness_time *buffer;
 813         size_t buffer_length;
 814         time64_t local_time;
 815         unsigned int year;
 816         struct tm tm;
 817
 818         buffer_length = sizeof(*buffer);
 819
 820         buffer = kmalloc(buffer_length, GFP_KERNEL);
 821         if (!buffer)
 822                 return -ENOMEM;
 823
 824         buffer->start_tag[0] = '<';
 825         buffer->start_tag[1] = 'H';
 826         buffer->start_tag[2] = 'W';
 827         buffer->start_tag[3] = '>';
 828         buffer->time_tag[0] = 'T';
 829         buffer->time_tag[1] = 'D';
 830         put_unaligned_le16(sizeof(buffer->time),
 831                 &buffer->time_length);
 832
 833         local_time = ktime_get_real_seconds();
 834         time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm);
 835         year = tm.tm_year + 1900;
 836
 837         buffer->time[0] = bin2bcd(tm.tm_hour);
 838         buffer->time[1] = bin2bcd(tm.tm_min);
 839         buffer->time[2] = bin2bcd(tm.tm_sec);
 840         buffer->time[3] = 0;
 841         buffer->time[4] = bin2bcd(tm.tm_mon + 1);
 842         buffer->time[5] = bin2bcd(tm.tm_mday);
 843         buffer->time[6] = bin2bcd(year / 100);
 844         buffer->time[7] = bin2bcd(year % 100);
 845
 846         buffer->dont_write_tag[0] = 'D';
 847         buffer->dont_write_tag[1] = 'W';
 848         buffer->end_tag[0] = 'Z';
 849         buffer->end_tag[1] = 'Z';
 850
 851         rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length);
 852
 853         kfree(buffer);
 854
 855         return rc;
 856 }
 857
 858 #define PQI_UPDATE_TIME_WORK_INTERVAL   (24UL * 60 * 60 * PQI_HZ)
 859
 860 static void pqi_update_time_worker(struct work_struct *work)
 861 {
 862         int rc;
 863         struct pqi_ctrl_info *ctrl_info;
 864
 865         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
 866                 update_time_work);
 867
 868         if (pqi_ctrl_offline(ctrl_info))
 869                 return;
 870
 871         rc = pqi_write_current_time_to_host_wellness(ctrl_info);
 872         if (rc)
 873                 dev_warn(&ctrl_info->pci_dev->dev,
 874                         "error updating time on controller\n");
 875
 876         schedule_delayed_work(&ctrl_info->update_time_work,
 877                 PQI_UPDATE_TIME_WORK_INTERVAL);
 878 }
 879
 880 static inline void pqi_schedule_update_time_worker(
 881         struct pqi_ctrl_info *ctrl_info)
 882 {
 883         schedule_delayed_work(&ctrl_info->update_time_work, 0);
 884 }
 885
 886 static inline void pqi_cancel_update_time_worker(
 887         struct pqi_ctrl_info *ctrl_info)
 888 {
 889         cancel_delayed_work_sync(&ctrl_info->update_time_work);
 890 }
 891
 892 static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 893         void *buffer, size_t buffer_length)
 894 {
 895         return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer,
 896                                         buffer_length);
 897 }
 898
 899 static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
 900         void **buffer)
 901 {
 902         int rc;
 903         size_t lun_list_length;
 904         size_t lun_data_length;
 905         size_t new_lun_list_length;
 906         void *lun_data = NULL;
 907         struct report_lun_header *report_lun_header;
 908
 909         report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL);
 910         if (!report_lun_header) {
 911                 rc = -ENOMEM;
 912                 goto out;
 913         }
 914
 915         rc = pqi_report_luns(ctrl_info, cmd, report_lun_header,
 916                 sizeof(*report_lun_header));
 917         if (rc)
 918                 goto out;
 919
 920         lun_list_length = get_unaligned_be32(&report_lun_header->list_length);
 921
 922 again:
 923         lun_data_length = sizeof(struct report_lun_header) + lun_list_length;
 924
 925         lun_data = kmalloc(lun_data_length, GFP_KERNEL);
 926         if (!lun_data) {
 927                 rc = -ENOMEM;
 928                 goto out;
 929         }
 930
 931         if (lun_list_length == 0) {
 932                 memcpy(lun_data, report_lun_header, sizeof(*report_lun_header));
 933                 goto out;
 934         }
 935
 936         rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length);
 937         if (rc)
 938                 goto out;
 939
 940         new_lun_list_length = get_unaligned_be32(
 941                 &((struct report_lun_header *)lun_data)->list_length);
 942
 943         if (new_lun_list_length > lun_list_length) {
 944                 lun_list_length = new_lun_list_length;
 945                 kfree(lun_data);
 946                 goto again;
 947         }
 948
 949 out:
 950         kfree(report_lun_header);
 951
 952         if (rc) {
 953                 kfree(lun_data);
 954                 lun_data = NULL;
 955         }
 956
 957         *buffer = lun_data;
 958
 959         return rc;
 960 }
 961
 962 static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info,
 963         void **buffer)
 964 {
 965         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS,
 966                 buffer);
 967 }
 968
 969 static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info,
 970         void **buffer)
 971 {
 972         return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer);
 973 }
 974
 975 static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info,
 976         struct report_phys_lun_extended **physdev_list,
 977         struct report_log_lun_extended **logdev_list)
 978 {
 979         int rc;
 980         size_t logdev_list_length;
 981         size_t logdev_data_length;
 982         struct report_log_lun_extended *internal_logdev_list;
 983         struct report_log_lun_extended *logdev_data;
 984         struct report_lun_header report_lun_header;
 985
 986         rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list);
 987         if (rc)
 988                 dev_err(&ctrl_info->pci_dev->dev,
 989                         "report physical LUNs failed\n");
 990
 991         rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list);
 992         if (rc)
 993                 dev_err(&ctrl_info->pci_dev->dev,
 994                         "report logical LUNs failed\n");
 995
 996         /*
 997          * Tack the controller itself onto the end of the logical device list.
 998          */
 999
1000         logdev_data = *logdev_list;
1001
1002         if (logdev_data) {
1003                 logdev_list_length =
1004                         get_unaligned_be32(&logdev_data->header.list_length);
1005         } else {
1006                 memset(&report_lun_header, 0, sizeof(report_lun_header));
1007                 logdev_data =
1008                         (struct report_log_lun_extended *)&report_lun_header;
1009                 logdev_list_length = 0;
1010         }
1011
1012         logdev_data_length = sizeof(struct report_lun_header) +
1013                 logdev_list_length;
1014
1015         internal_logdev_list = kmalloc(logdev_data_length +
1016                 sizeof(struct report_log_lun_extended), GFP_KERNEL);
1017         if (!internal_logdev_list) {
1018                 kfree(*logdev_list);
1019                 *logdev_list = NULL;
1020                 return -ENOMEM;
1021         }
1022
1023         memcpy(internal_logdev_list, logdev_data, logdev_data_length);
1024         memset((u8 *)internal_logdev_list + logdev_data_length, 0,
1025                 sizeof(struct report_log_lun_extended_entry));
1026         put_unaligned_be32(logdev_list_length +
1027                 sizeof(struct report_log_lun_extended_entry),
1028                 &internal_logdev_list->header.list_length);
1029
1030         kfree(*logdev_list);
1031         *logdev_list = internal_logdev_list;
1032
1033         return 0;
1034 }
1035
1036 static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device,
1037         int bus, int target, int lun)
1038 {
1039         device->bus = bus;
1040         device->target = target;
1041         device->lun = lun;
1042 }
1043
1044 static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device)
1045 {
1046         u8 *scsi3addr;
1047         u32 lunid;
1048         int bus;
1049         int target;
1050         int lun;
1051
1052         scsi3addr = device->scsi3addr;
1053         lunid = get_unaligned_le32(scsi3addr);
1054
1055         if (pqi_is_hba_lunid(scsi3addr)) {
1056                 /* The specified device is the controller. */
1057                 pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff);
1058                 device->target_lun_valid = true;
1059                 return;
1060         }
1061
1062         if (pqi_is_logical_device(device)) {
1063                 if (device->is_external_raid_device) {
1064                         bus = PQI_EXTERNAL_RAID_VOLUME_BUS;
1065                         target = (lunid >> 16) & 0x3fff;
1066                         lun = lunid & 0xff;
1067                 } else {
1068                         bus = PQI_RAID_VOLUME_BUS;
1069                         target = 0;
1070                         lun = lunid & 0x3fff;
1071                 }
1072                 pqi_set_bus_target_lun(device, bus, target, lun);
1073                 device->target_lun_valid = true;
1074                 return;
1075         }
1076
1077         /*
1078          * Defer target and LUN assignment for non-controller physical devices
1079          * because the SAS transport layer will make these assignments later.
1080          */
1081         pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0);
1082 }
1083
1084 static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info,
1085         struct pqi_scsi_dev *device)
1086 {
1087         int rc;
1088         u8 raid_level;
1089         u8 *buffer;
1090
1091         raid_level = SA_RAID_UNKNOWN;
1092
1093         buffer = kmalloc(64, GFP_KERNEL);
1094         if (buffer) {
1095                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1096                         VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64);
1097                 if (rc == 0) {
1098                         raid_level = buffer[8];
1099                         if (raid_level > SA_RAID_MAX)
1100                                 raid_level = SA_RAID_UNKNOWN;
1101                 }
1102                 kfree(buffer);
1103         }
1104
1105         device->raid_level = raid_level;
1106 }
1107
1108 static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info,
1109         struct pqi_scsi_dev *device, struct raid_map *raid_map)
1110 {
1111         char *err_msg;
1112         u32 raid_map_size;
1113         u32 r5or6_blocks_per_row;
1114
1115         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1116
1117         if (raid_map_size < offsetof(struct raid_map, disk_data)) {
1118                 err_msg = "RAID map too small";
1119                 goto bad_raid_map;
1120         }
1121
1122         if (device->raid_level == SA_RAID_1) {
1123                 if (get_unaligned_le16(&raid_map->layout_map_count) != 2) {
1124                         err_msg = "invalid RAID-1 map";
1125                         goto bad_raid_map;
1126                 }
1127         } else if (device->raid_level == SA_RAID_ADM) {
1128                 if (get_unaligned_le16(&raid_map->layout_map_count) != 3) {
1129                         err_msg = "invalid RAID-1(ADM) map";
1130                         goto bad_raid_map;
1131                 }
1132         } else if ((device->raid_level == SA_RAID_5 ||
1133                 device->raid_level == SA_RAID_6) &&
1134                 get_unaligned_le16(&raid_map->layout_map_count) > 1) {
1135                 /* RAID 50/60 */
1136                 r5or6_blocks_per_row =
1137                         get_unaligned_le16(&raid_map->strip_size) *
1138                         get_unaligned_le16(&raid_map->data_disks_per_row);
1139                 if (r5or6_blocks_per_row == 0) {
1140                         err_msg = "invalid RAID-5 or RAID-6 map";
1141                         goto bad_raid_map;
1142                 }
1143         }
1144
1145         return 0;
1146
1147 bad_raid_map:
1148         dev_warn(&ctrl_info->pci_dev->dev,
1149                 "logical device %08x%08x %s\n",
1150                 *((u32 *)&device->scsi3addr),
1151                 *((u32 *)&device->scsi3addr[4]), err_msg);
1152
1153         return -EINVAL;
1154 }
1155
1156 static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
1157         struct pqi_scsi_dev *device)
1158 {
1159         int rc;
1160         u32 raid_map_size;
1161         struct raid_map *raid_map;
1162
1163         raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
1164         if (!raid_map)
1165                 return -ENOMEM;
1166
1167         rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1168                 device->scsi3addr, raid_map, sizeof(*raid_map),
1169                 0, NULL, NO_TIMEOUT);
1170
1171         if (rc)
1172                 goto error;
1173
1174         raid_map_size = get_unaligned_le32(&raid_map->structure_size);
1175
1176         if (raid_map_size > sizeof(*raid_map)) {
1177
1178                 kfree(raid_map);
1179
1180                 raid_map = kmalloc(raid_map_size, GFP_KERNEL);
1181                 if (!raid_map)
1182                         return -ENOMEM;
1183
1184                 rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP,
1185                         device->scsi3addr, raid_map, raid_map_size,
1186                         0, NULL, NO_TIMEOUT);
1187                 if (rc)
1188                         goto error;
1189
1190                 if (get_unaligned_le32(&raid_map->structure_size)
1191                         != raid_map_size) {
1192                         dev_warn(&ctrl_info->pci_dev->dev,
1193                                 "Requested %d bytes, received %d bytes",
1194                                 raid_map_size,
1195                                 get_unaligned_le32(&raid_map->structure_size));
1196                         goto error;
1197                 }
1198         }
1199
1200         rc = pqi_validate_raid_map(ctrl_info, device, raid_map);
1201         if (rc)
1202                 goto error;
1203
1204         device->raid_map = raid_map;
1205
1206         return 0;
1207
1208 error:
1209         kfree(raid_map);
1210
1211         return rc;
1212 }
1213
1214 static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info,
1215         struct pqi_scsi_dev *device)
1216 {
1217         int rc;
1218         u8 *buffer;
1219         u8 bypass_status;
1220
1221         buffer = kmalloc(64, GFP_KERNEL);
1222         if (!buffer)
1223                 return;
1224
1225         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1226                 VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64);
1227         if (rc)
1228                 goto out;
1229
1230 #define RAID_BYPASS_STATUS      4
1231 #define RAID_BYPASS_CONFIGURED  0x1
1232 #define RAID_BYPASS_ENABLED     0x2
1233
1234         bypass_status = buffer[RAID_BYPASS_STATUS];
1235         device->raid_bypass_configured =
1236                 (bypass_status & RAID_BYPASS_CONFIGURED) != 0;
1237         if (device->raid_bypass_configured &&
1238                 (bypass_status & RAID_BYPASS_ENABLED) &&
1239                 pqi_get_raid_map(ctrl_info, device) == 0)
1240                 device->raid_bypass_enabled = true;
1241
1242 out:
1243         kfree(buffer);
1244 }
1245
1246 /*
1247  * Use vendor-specific VPD to determine online/offline status of a volume.
1248  */
1249
1250 static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info,
1251         struct pqi_scsi_dev *device)
1252 {
1253         int rc;
1254         size_t page_length;
1255         u8 volume_status = CISS_LV_STATUS_UNAVAILABLE;
1256         bool volume_offline = true;
1257         u32 volume_flags;
1258         struct ciss_vpd_logical_volume_status *vpd;
1259
1260         vpd = kmalloc(sizeof(*vpd), GFP_KERNEL);
1261         if (!vpd)
1262                 goto no_buffer;
1263
1264         rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
1265                 VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd));
1266         if (rc)
1267                 goto out;
1268
1269         if (vpd->page_code != CISS_VPD_LV_STATUS)
1270                 goto out;
1271
1272         page_length = offsetof(struct ciss_vpd_logical_volume_status,
1273                 volume_status) + vpd->page_length;
1274         if (page_length < sizeof(*vpd))
1275                 goto out;
1276
1277         volume_status = vpd->volume_status;
1278         volume_flags = get_unaligned_be32(&vpd->flags);
1279         volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0;
1280
1281 out:
1282         kfree(vpd);
1283 no_buffer:
1284         device->volume_status = volume_status;
1285         device->volume_offline = volume_offline;
1286 }
1287
1288 #define PQI_INQUIRY_PAGE0_RETRIES       3
1289
1290 static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info,
1291         struct pqi_scsi_dev *device)
1292 {
1293         int rc;
1294         u8 *buffer;
1295         unsigned int retries;
1296
1297         if (device->is_expander_smp_device)
1298                 return 0;
1299
1300         buffer = kmalloc(64, GFP_KERNEL);
1301         if (!buffer)
1302                 return -ENOMEM;
1303
1304         /* Send an inquiry to the device to see what it is. */
1305         for (retries = 0;;) {
1306                 rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0,
1307                         buffer, 64);
1308                 if (rc == 0)
1309                         break;
1310                 if (pqi_is_logical_device(device) ||
1311                         rc != PQI_CMD_STATUS_ABORTED ||
1312                         ++retries > PQI_INQUIRY_PAGE0_RETRIES)
1313                         goto out;
1314         }
1315
1316         scsi_sanitize_inquiry_string(&buffer[8], 8);
1317         scsi_sanitize_inquiry_string(&buffer[16], 16);
1318
1319         device->devtype = buffer[0] & 0x1f;
1320         memcpy(device->vendor, &buffer[8], sizeof(device->vendor));
1321         memcpy(device->model, &buffer[16], sizeof(device->model));
1322
1323         if (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
1324                 if (device->is_external_raid_device) {
1325                         device->raid_level = SA_RAID_UNKNOWN;
1326                         device->volume_status = CISS_LV_OK;
1327                         device->volume_offline = false;
1328                 } else {
1329                         pqi_get_raid_level(ctrl_info, device);
1330                         pqi_get_raid_bypass_status(ctrl_info, device);
1331                         pqi_get_volume_status(ctrl_info, device);
1332                 }
1333         }
1334
1335 out:
1336         kfree(buffer);
1337
1338         return rc;
1339 }
1340
1341 static void pqi_get_physical_disk_info(struct pqi_ctrl_info *ctrl_info,
1342         struct pqi_scsi_dev *device,
1343         struct bmic_identify_physical_device *id_phys)
1344 {
1345         int rc;
1346
1347         memset(id_phys, 0, sizeof(*id_phys));
1348
1349         rc = pqi_identify_physical_device(ctrl_info, device,
1350                 id_phys, sizeof(*id_phys));
1351         if (rc) {
1352                 device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH;
1353                 return;
1354         }
1355         device->box_index = id_phys->box_index;
1356         device->phys_box_on_bus = id_phys->phys_box_on_bus;
1357         device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0];
1358         device->queue_depth =
1359                 get_unaligned_le16(&id_phys->current_queue_depth_limit);
1360         device->device_type = id_phys->device_type;
1361         device->active_path_index = id_phys->active_path_number;
1362         device->path_map = id_phys->redundant_path_present_map;
1363         memcpy(&device->box,
1364                 &id_phys->alternate_paths_phys_box_on_port,
1365                 sizeof(device->box));
1366         memcpy(&device->phys_connector,
1367                 &id_phys->alternate_paths_phys_connector,
1368                 sizeof(device->phys_connector));
1369         device->bay = id_phys->phys_bay_in_box;
1370 }
1371
1372 static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info,
1373         struct pqi_scsi_dev *device)
1374 {
1375         char *status;
1376         static const char unknown_state_str[] =
1377                 "Volume is in an unknown state (%u)";
1378         char unknown_state_buffer[sizeof(unknown_state_str) + 10];
1379
1380         switch (device->volume_status) {
1381         case CISS_LV_OK:
1382                 status = "Volume online";
1383                 break;
1384         case CISS_LV_FAILED:
1385                 status = "Volume failed";
1386                 break;
1387         case CISS_LV_NOT_CONFIGURED:
1388                 status = "Volume not configured";
1389                 break;
1390         case CISS_LV_DEGRADED:
1391                 status = "Volume degraded";
1392                 break;
1393         case CISS_LV_READY_FOR_RECOVERY:
1394                 status = "Volume ready for recovery operation";
1395                 break;
1396         case CISS_LV_UNDERGOING_RECOVERY:
1397                 status = "Volume undergoing recovery";
1398                 break;
1399         case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED:
1400                 status = "Wrong physical drive was replaced";
1401                 break;
1402         case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM:
1403                 status = "A physical drive not properly connected";
1404                 break;
1405         case CISS_LV_HARDWARE_OVERHEATING:
1406                 status = "Hardware is overheating";
1407                 break;
1408         case CISS_LV_HARDWARE_HAS_OVERHEATED:
1409                 status = "Hardware has overheated";
1410                 break;
1411         case CISS_LV_UNDERGOING_EXPANSION:
1412                 status = "Volume undergoing expansion";
1413                 break;
1414         case CISS_LV_NOT_AVAILABLE:
1415                 status = "Volume waiting for transforming volume";
1416                 break;
1417         case CISS_LV_QUEUED_FOR_EXPANSION:
1418                 status = "Volume queued for expansion";
1419                 break;
1420         case CISS_LV_DISABLED_SCSI_ID_CONFLICT:
1421                 status = "Volume disabled due to SCSI ID conflict";
1422                 break;
1423         case CISS_LV_EJECTED:
1424                 status = "Volume has been ejected";
1425                 break;
1426         case CISS_LV_UNDERGOING_ERASE:
1427                 status = "Volume undergoing background erase";
1428                 break;
1429         case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD:
1430                 status = "Volume ready for predictive spare rebuild";
1431                 break;
1432         case CISS_LV_UNDERGOING_RPI:
1433                 status = "Volume undergoing rapid parity initialization";
1434                 break;
1435         case CISS_LV_PENDING_RPI:
1436                 status = "Volume queued for rapid parity initialization";
1437                 break;
1438         case CISS_LV_ENCRYPTED_NO_KEY:
1439                 status = "Encrypted volume inaccessible - key not present";
1440                 break;
1441         case CISS_LV_UNDERGOING_ENCRYPTION:
1442                 status = "Volume undergoing encryption process";
1443                 break;
1444         case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING:
1445                 status = "Volume undergoing encryption re-keying process";
1446                 break;
1447         case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1448                 status = "Volume encrypted but encryption is disabled";
1449                 break;
1450         case CISS_LV_PENDING_ENCRYPTION:
1451                 status = "Volume pending migration to encrypted state";
1452                 break;
1453         case CISS_LV_PENDING_ENCRYPTION_REKEYING:
1454                 status = "Volume pending encryption rekeying";
1455                 break;
1456         case CISS_LV_NOT_SUPPORTED:
1457                 status = "Volume not supported on this controller";
1458                 break;
1459         case CISS_LV_STATUS_UNAVAILABLE:
1460                 status = "Volume status not available";
1461                 break;
1462         default:
1463                 snprintf(unknown_state_buffer, sizeof(unknown_state_buffer),
1464                         unknown_state_str, device->volume_status);
1465                 status = unknown_state_buffer;
1466                 break;
1467         }
1468
1469         dev_info(&ctrl_info->pci_dev->dev,
1470                 "scsi %d:%d:%d:%d %s\n",
1471                 ctrl_info->scsi_host->host_no,
1472                 device->bus, device->target, device->lun, status);
1473 }
1474
1475 static void pqi_rescan_worker(struct work_struct *work)
1476 {
1477         struct pqi_ctrl_info *ctrl_info;
1478
1479         ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info,
1480                 rescan_work);
1481
1482         pqi_scan_scsi_devices(ctrl_info);
1483 }
1484
1485 static int pqi_add_device(struct pqi_ctrl_info *ctrl_info,
1486         struct pqi_scsi_dev *device)
1487 {
1488         int rc;
1489
1490         if (pqi_is_logical_device(device))
1491                 rc = scsi_add_device(ctrl_info->scsi_host, device->bus,
1492                         device->target, device->lun);
1493         else
1494                 rc = pqi_add_sas_device(ctrl_info->sas_host, device);
1495
1496         return rc;
1497 }
1498
1499 #define PQI_PENDING_IO_TIMEOUT_SECS     20
1500
1501 static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
1502         struct pqi_scsi_dev *device)
1503 {
1504         int rc;
1505
1506         pqi_device_remove_start(device);
1507
1508         rc = pqi_device_wait_for_pending_io(ctrl_info, device,
1509                 PQI_PENDING_IO_TIMEOUT_SECS);
1510         if (rc)
1511                 dev_err(&ctrl_info->pci_dev->dev,
1512                         "scsi %d:%d:%d:%d removing device with %d outstanding commands\n",
1513                         ctrl_info->scsi_host->host_no, device->bus,
1514                         device->target, device->lun,
1515                         atomic_read(&device->scsi_cmds_outstanding));
1516
1517         if (pqi_is_logical_device(device))
1518                 scsi_remove_device(device->sdev);
1519         else
1520                 pqi_remove_sas_device(device);
1521 }
1522
1523 /* Assumes the SCSI device list lock is held. */
1524
1525 static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info,
1526         int bus, int target, int lun)
1527 {
1528         struct pqi_scsi_dev *device;
1529
1530         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1531                 scsi_device_list_entry)
1532                 if (device->bus == bus && device->target == target &&
1533                         device->lun == lun)
1534                         return device;
1535
1536         return NULL;
1537 }
1538
1539 static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1,
1540         struct pqi_scsi_dev *dev2)
1541 {
1542         if (dev1->is_physical_device != dev2->is_physical_device)
1543                 return false;
1544
1545         if (dev1->is_physical_device)
1546                 return dev1->wwid == dev2->wwid;
1547
1548         return memcmp(dev1->volume_id, dev2->volume_id,
1549                 sizeof(dev1->volume_id)) == 0;
1550 }
1551
1552 enum pqi_find_result {
1553         DEVICE_NOT_FOUND,
1554         DEVICE_CHANGED,
1555         DEVICE_SAME,
1556 };
1557
1558 static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info,
1559         struct pqi_scsi_dev *device_to_find,
1560         struct pqi_scsi_dev **matching_device)
1561 {
1562         struct pqi_scsi_dev *device;
1563
1564         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1565                 scsi_device_list_entry) {
1566                 if (pqi_scsi3addr_equal(device_to_find->scsi3addr,
1567                         device->scsi3addr)) {
1568                         *matching_device = device;
1569                         if (pqi_device_equal(device_to_find, device)) {
1570                                 if (device_to_find->volume_offline)
1571                                         return DEVICE_CHANGED;
1572                                 return DEVICE_SAME;
1573                         }
1574                         return DEVICE_CHANGED;
1575                 }
1576         }
1577
1578         return DEVICE_NOT_FOUND;
1579 }
1580
1581 static inline const char *pqi_device_type(struct pqi_scsi_dev *device)
1582 {
1583         if (device->is_expander_smp_device)
1584                 return "Enclosure SMP    ";
1585
1586         return scsi_device_type(device->devtype);
1587 }
1588
1589 #define PQI_DEV_INFO_BUFFER_LENGTH      128
1590
1591 static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
1592         char *action, struct pqi_scsi_dev *device)
1593 {
1594         ssize_t count;
1595         char buffer[PQI_DEV_INFO_BUFFER_LENGTH];
1596
1597         count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH,
1598                 "%d:%d:", ctrl_info->scsi_host->host_no, device->bus);
1599
1600         if (device->target_lun_valid)
1601                 count += snprintf(buffer + count,
1602                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1603                         "%d:%d",
1604                         device->target,
1605                         device->lun);
1606         else
1607                 count += snprintf(buffer + count,
1608                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1609                         "-:-");
1610
1611         if (pqi_is_logical_device(device))
1612                 count += snprintf(buffer + count,
1613                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1614                         " %08x%08x",
1615                         *((u32 *)&device->scsi3addr),
1616                         *((u32 *)&device->scsi3addr[4]));
1617         else
1618                 count += snprintf(buffer + count,
1619                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1620                         " %016llx", device->sas_address);
1621
1622         count += snprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count,
1623                 " %s %.8s %.16s ",
1624                 pqi_device_type(device),
1625                 device->vendor,
1626                 device->model);
1627
1628         if (pqi_is_logical_device(device)) {
1629                 if (device->devtype == TYPE_DISK)
1630                         count += snprintf(buffer + count,
1631                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1632                                 "SSDSmartPathCap%c En%c %-12s",
1633                                 device->raid_bypass_configured ? '+' : '-',
1634                                 device->raid_bypass_enabled ? '+' : '-',
1635                                 pqi_raid_level_to_string(device->raid_level));
1636         } else {
1637                 count += snprintf(buffer + count,
1638                         PQI_DEV_INFO_BUFFER_LENGTH - count,
1639                         "AIO%c", device->aio_enabled ? '+' : '-');
1640                 if (device->devtype == TYPE_DISK ||
1641                         device->devtype == TYPE_ZBC)
1642                         count += snprintf(buffer + count,
1643                                 PQI_DEV_INFO_BUFFER_LENGTH - count,
1644                                 " qd=%-6d", device->queue_depth);
1645         }
1646
1647         dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer);
1648 }
1649
1650 /* Assumes the SCSI device list lock is held. */
1651
1652 static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device,
1653         struct pqi_scsi_dev *new_device)
1654 {
1655         existing_device->devtype = new_device->devtype;
1656         existing_device->device_type = new_device->device_type;
1657         existing_device->bus = new_device->bus;
1658         if (new_device->target_lun_valid) {
1659                 existing_device->target = new_device->target;
1660                 existing_device->lun = new_device->lun;
1661                 existing_device->target_lun_valid = true;
1662         }
1663
1664         /* By definition, the scsi3addr and wwid fields are already the same. */
1665
1666         existing_device->is_physical_device = new_device->is_physical_device;
1667         existing_device->is_external_raid_device =
1668                 new_device->is_external_raid_device;
1669         existing_device->is_expander_smp_device =
1670                 new_device->is_expander_smp_device;
1671         existing_device->aio_enabled = new_device->aio_enabled;
1672         memcpy(existing_device->vendor, new_device->vendor,
1673                 sizeof(existing_device->vendor));
1674         memcpy(existing_device->model, new_device->model,
1675                 sizeof(existing_device->model));
1676         existing_device->sas_address = new_device->sas_address;
1677         existing_device->raid_level = new_device->raid_level;
1678         existing_device->queue_depth = new_device->queue_depth;
1679         existing_device->aio_handle = new_device->aio_handle;
1680         existing_device->volume_status = new_device->volume_status;
1681         existing_device->active_path_index = new_device->active_path_index;
1682         existing_device->path_map = new_device->path_map;
1683         existing_device->bay = new_device->bay;
1684         existing_device->box_index = new_device->box_index;
1685         existing_device->phys_box_on_bus = new_device->phys_box_on_bus;
1686         existing_device->phy_connected_dev_type =
1687                 new_device->phy_connected_dev_type;
1688         memcpy(existing_device->box, new_device->box,
1689                 sizeof(existing_device->box));
1690         memcpy(existing_device->phys_connector, new_device->phys_connector,
1691                 sizeof(existing_device->phys_connector));
1692         existing_device->offload_to_mirror = 0;
1693         kfree(existing_device->raid_map);
1694         existing_device->raid_map = new_device->raid_map;
1695         existing_device->raid_bypass_configured =
1696                 new_device->raid_bypass_configured;
1697         existing_device->raid_bypass_enabled =
1698                 new_device->raid_bypass_enabled;
1699         existing_device->device_offline = false;
1700
1701         /* To prevent this from being freed later. */
1702         new_device->raid_map = NULL;
1703 }
1704
1705 static inline void pqi_free_device(struct pqi_scsi_dev *device)
1706 {
1707         if (device) {
1708                 kfree(device->raid_map);
1709                 kfree(device);
1710         }
1711 }
1712
1713 /*
1714  * Called when exposing a new device to the OS fails in order to re-adjust
1715  * our internal SCSI device list to match the SCSI ML's view.
1716  */
1717
1718 static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info,
1719         struct pqi_scsi_dev *device)
1720 {
1721         unsigned long flags;
1722
1723         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1724         list_del(&device->scsi_device_list_entry);
1725         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1726
1727         /* Allow the device structure to be freed later. */
1728         device->keep_device = false;
1729 }
1730
1731 static inline bool pqi_is_device_added(struct pqi_scsi_dev *device)
1732 {
1733         if (device->is_expander_smp_device)
1734                 return device->sas_port != NULL;
1735
1736         return device->sdev != NULL;
1737 }
1738
1739 static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info,
1740         struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices)
1741 {
1742         int rc;
1743         unsigned int i;
1744         unsigned long flags;
1745         enum pqi_find_result find_result;
1746         struct pqi_scsi_dev *device;
1747         struct pqi_scsi_dev *next;
1748         struct pqi_scsi_dev *matching_device;
1749         LIST_HEAD(add_list);
1750         LIST_HEAD(delete_list);
1751
1752         /*
1753          * The idea here is to do as little work as possible while holding the
1754          * spinlock.  That's why we go to great pains to defer anything other
1755          * than updating the internal device list until after we release the
1756          * spinlock.
1757          */
1758
1759         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
1760
1761         /* Assume that all devices in the existing list have gone away. */
1762         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1763                 scsi_device_list_entry)
1764                 device->device_gone = true;
1765
1766         for (i = 0; i < num_new_devices; i++) {
1767                 device = new_device_list[i];
1768
1769                 find_result = pqi_scsi_find_entry(ctrl_info, device,
1770                                                 &matching_device);
1771
1772                 switch (find_result) {
1773                 case DEVICE_SAME:
1774                         /*
1775                          * The newly found device is already in the existing
1776                          * device list.
1777                          */
1778                         device->new_device = false;
1779                         matching_device->device_gone = false;
1780                         pqi_scsi_update_device(matching_device, device);
1781                         break;
1782                 case DEVICE_NOT_FOUND:
1783                         /*
1784                          * The newly found device is NOT in the existing device
1785                          * list.
1786                          */
1787                         device->new_device = true;
1788                         break;
1789                 case DEVICE_CHANGED:
1790                         /*
1791                          * The original device has gone away and we need to add
1792                          * the new device.
1793                          */
1794                         device->new_device = true;
1795                         break;
1796                 }
1797         }
1798
1799         /* Process all devices that have gone away. */
1800         list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
1801                 scsi_device_list_entry) {
1802                 if (device->device_gone) {
1803                         list_del(&device->scsi_device_list_entry);
1804                         list_add_tail(&device->delete_list_entry, &delete_list);
1805                 }
1806         }
1807
1808         /* Process all new devices. */
1809         for (i = 0; i < num_new_devices; i++) {
1810                 device = new_device_list[i];
1811                 if (!device->new_device)
1812                         continue;
1813                 if (device->volume_offline)
1814                         continue;
1815                 list_add_tail(&device->scsi_device_list_entry,
1816                         &ctrl_info->scsi_device_list);
1817                 list_add_tail(&device->add_list_entry, &add_list);
1818                 /* To prevent this device structure from being freed later. */
1819                 device->keep_device = true;
1820         }
1821
1822         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
1823
1824         if (pqi_ctrl_in_ofa(ctrl_info))
1825                 pqi_ctrl_ofa_done(ctrl_info);
1826
1827         /* Remove all devices that have gone away. */
1828         list_for_each_entry_safe(device, next, &delete_list,
1829                 delete_list_entry) {
1830                 if (device->volume_offline) {
1831                         pqi_dev_info(ctrl_info, "offline", device);
1832                         pqi_show_volume_status(ctrl_info, device);
1833                 } else {
1834                         pqi_dev_info(ctrl_info, "removed", device);
1835                 }
1836                 if (pqi_is_device_added(device))
1837                         pqi_remove_device(ctrl_info, device);
1838                 list_del(&device->delete_list_entry);
1839                 pqi_free_device(device);
1840         }
1841
1842         /*
1843          * Notify the SCSI ML if the queue depth of any existing device has
1844          * changed.
1845          */
1846         list_for_each_entry(device, &ctrl_info->scsi_device_list,
1847                 scsi_device_list_entry) {
1848                 if (device->sdev && device->queue_depth !=
1849                         device->advertised_queue_depth) {
1850                         device->advertised_queue_depth = device->queue_depth;
1851                         scsi_change_queue_depth(device->sdev,
1852                                 device->advertised_queue_depth);
1853                 }
1854         }
1855
1856         /* Expose any new devices. */
1857         list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
1858                 if (!pqi_is_device_added(device)) {
1859                         pqi_dev_info(ctrl_info, "added", device);
1860                         rc = pqi_add_device(ctrl_info, device);
1861                         if (rc) {
1862                                 dev_warn(&ctrl_info->pci_dev->dev,
1863                                         "scsi %d:%d:%d:%d addition failed, device not added\n",
1864                                         ctrl_info->scsi_host->host_no,
1865                                         device->bus, device->target,
1866                                         device->lun);
1867                                 pqi_fixup_botched_add(ctrl_info, device);
1868                         }
1869                 }
1870         }
1871 }
1872
1873 static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
1874 {
1875         bool is_supported;
1876
1877         if (device->is_expander_smp_device)
1878                 return true;
1879
1880         is_supported = false;
1881
1882         switch (device->devtype) {
1883         case TYPE_DISK:
1884         case TYPE_ZBC:
1885         case TYPE_TAPE:
1886         case TYPE_MEDIUM_CHANGER:
1887         case TYPE_ENCLOSURE:
1888                 is_supported = true;
1889                 break;
1890         case TYPE_RAID:
1891                 /*
1892                  * Only support the HBA controller itself as a RAID
1893                  * controller.  If it's a RAID controller other than
1894                  * the HBA itself (an external RAID controller, for
1895                  * example), we don't support it.
1896                  */
1897                 if (pqi_is_hba_lunid(device->scsi3addr))
1898                         is_supported = true;
1899                 break;
1900         }
1901
1902         return is_supported;
1903 }
1904
1905 static inline bool pqi_skip_device(u8 *scsi3addr)
1906 {
1907         /* Ignore all masked devices. */
1908         if (MASKED_DEVICE(scsi3addr))
1909                 return true;
1910
1911         return false;
1912 }
1913
1914 static inline void pqi_mask_device(u8 *scsi3addr)
1915 {
1916         scsi3addr[3] |= 0xc0;
1917 }
1918
1919 static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device)
1920 {
1921         if (!device->is_physical_device)
1922                 return false;
1923
1924         if (device->is_expander_smp_device)
1925                 return true;
1926
1927         switch (device->devtype) {
1928         case TYPE_DISK:
1929         case TYPE_ZBC:
1930         case TYPE_ENCLOSURE:
1931                 return true;
1932         }
1933
1934         return false;
1935 }
1936
1937 static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
1938 {
1939         return !device->is_physical_device ||
1940                 !pqi_skip_device(device->scsi3addr);
1941 }
1942
1943 static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
1944 {
1945         int i;
1946         int rc;
1947         LIST_HEAD(new_device_list_head);
1948         struct report_phys_lun_extended *physdev_list = NULL;
1949         struct report_log_lun_extended *logdev_list = NULL;
1950         struct report_phys_lun_extended_entry *phys_lun_ext_entry;
1951         struct report_log_lun_extended_entry *log_lun_ext_entry;
1952         struct bmic_identify_physical_device *id_phys = NULL;
1953         u32 num_physicals;
1954         u32 num_logicals;
1955         struct pqi_scsi_dev **new_device_list = NULL;
1956         struct pqi_scsi_dev *device;
1957         struct pqi_scsi_dev *next;
1958         unsigned int num_new_devices;
1959         unsigned int num_valid_devices;
1960         bool is_physical_device;
1961         u8 *scsi3addr;
1962         unsigned int physical_index;
1963         unsigned int logical_index;
1964         static char *out_of_memory_msg =
1965                 "failed to allocate memory, device discovery stopped";
1966
1967         rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list);
1968         if (rc)
1969                 goto out;
1970
1971         if (physdev_list)
1972                 num_physicals =
1973                         get_unaligned_be32(&physdev_list->header.list_length)
1974                                 / sizeof(physdev_list->lun_entries[0]);
1975         else
1976                 num_physicals = 0;
1977
1978         if (logdev_list)
1979                 num_logicals =
1980                         get_unaligned_be32(&logdev_list->header.list_length)
1981                                 / sizeof(logdev_list->lun_entries[0]);
1982         else
1983                 num_logicals = 0;
1984
1985         if (num_physicals) {
1986                 /*
1987                  * We need this buffer for calls to pqi_get_physical_disk_info()
1988                  * below.  We allocate it here instead of inside
1989                  * pqi_get_physical_disk_info() because it's a fairly large
1990                  * buffer.
1991                  */
1992                 id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL);
1993                 if (!id_phys) {
1994                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
1995                                 out_of_memory_msg);
1996                         rc = -ENOMEM;
1997                         goto out;
1998                 }
1999                 if (pqi_hide_vsep) {
2000                         int i;
2001
2002                         for (i = num_physicals - 1; i >= 0; i--) {
2003                                 phys_lun_ext_entry =
2004                                                 &physdev_list->lun_entries[i];
2005                                 if (CISS_GET_DRIVE_NUMBER(
2006                                         phys_lun_ext_entry->lunid) ==
2007                                                 PQI_VSEP_CISS_BTL) {
2008                                         pqi_mask_device(
2009                                                 phys_lun_ext_entry->lunid);
2010                                         break;
2011                                 }
2012                         }
2013                 }
2014         }
2015
2016         num_new_devices = num_physicals + num_logicals;
2017
2018         new_device_list = kmalloc_array(num_new_devices,
2019                                         sizeof(*new_device_list),
2020                                         GFP_KERNEL);
2021         if (!new_device_list) {
2022                 dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg);
2023                 rc = -ENOMEM;
2024                 goto out;
2025         }
2026
2027         for (i = 0; i < num_new_devices; i++) {
2028                 device = kzalloc(sizeof(*device), GFP_KERNEL);
2029                 if (!device) {
2030                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2031                                 out_of_memory_msg);
2032                         rc = -ENOMEM;
2033                         goto out;
2034                 }
2035                 list_add_tail(&device->new_device_list_entry,
2036                         &new_device_list_head);
2037         }
2038
2039         device = NULL;
2040         num_valid_devices = 0;
2041         physical_index = 0;
2042         logical_index = 0;
2043
2044         for (i = 0; i < num_new_devices; i++) {
2045
2046                 if ((!pqi_expose_ld_first && i < num_physicals) ||
2047                         (pqi_expose_ld_first && i >= num_logicals)) {
2048                         is_physical_device = true;
2049                         phys_lun_ext_entry =
2050                                 &physdev_list->lun_entries[physical_index++];
2051                         log_lun_ext_entry = NULL;
2052                         scsi3addr = phys_lun_ext_entry->lunid;
2053                 } else {
2054                         is_physical_device = false;
2055                         phys_lun_ext_entry = NULL;
2056                         log_lun_ext_entry =
2057                                 &logdev_list->lun_entries[logical_index++];
2058                         scsi3addr = log_lun_ext_entry->lunid;
2059                 }
2060
2061                 if (is_physical_device && pqi_skip_device(scsi3addr))
2062                         continue;
2063
2064                 if (device)
2065                         device = list_next_entry(device, new_device_list_entry);
2066                 else
2067                         device = list_first_entry(&new_device_list_head,
2068                                 struct pqi_scsi_dev, new_device_list_entry);
2069
2070                 memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
2071                 device->is_physical_device = is_physical_device;
2072                 if (is_physical_device) {
2073                         if (phys_lun_ext_entry->device_type ==
2074                                 SA_EXPANDER_SMP_DEVICE)
2075                                 device->is_expander_smp_device = true;
2076                 } else {
2077                         device->is_external_raid_device =
2078                                 pqi_is_external_raid_addr(scsi3addr);
2079                 }
2080
2081                 /* Gather information about the device. */
2082                 rc = pqi_get_device_info(ctrl_info, device);
2083                 if (rc == -ENOMEM) {
2084                         dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
2085                                 out_of_memory_msg);
2086                         goto out;
2087                 }
2088                 if (rc) {
2089                         if (device->is_physical_device)
2090                                 dev_warn(&ctrl_info->pci_dev->dev,
2091                                         "obtaining device info failed, skipping physical device %016llx\n",
2092                                         get_unaligned_be64(
2093                                                 &phys_lun_ext_entry->wwid));
2094                         else
2095                                 dev_warn(&ctrl_info->pci_dev->dev,
2096                                         "obtaining device info failed, skipping logical device %08x%08x\n",
2097                                         *((u32 *)&device->scsi3addr),
2098                                         *((u32 *)&device->scsi3addr[4]));
2099                         rc = 0;
2100                         continue;
2101                 }
2102
2103                 if (!pqi_is_supported_device(device))
2104                         continue;
2105
2106                 pqi_assign_bus_target_lun(device);
2107
2108                 if (device->is_physical_device) {
2109                         device->wwid = phys_lun_ext_entry->wwid;
2110                         if ((phys_lun_ext_entry->device_flags &
2111                                 REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
2112                                 phys_lun_ext_entry->aio_handle) {
2113                                 device->aio_enabled = true;
2114                                         device->aio_handle =
2115                                                 phys_lun_ext_entry->aio_handle;
2116                         }
2117
2118                                 pqi_get_physical_disk_info(ctrl_info,
2119                                         device, id_phys);
2120
2121                 } else {
2122                         memcpy(device->volume_id, log_lun_ext_entry->volume_id,
2123                                 sizeof(device->volume_id));
2124                 }
2125
2126                 if (pqi_is_device_with_sas_address(device))
2127                         device->sas_address = get_unaligned_be64(&device->wwid);
2128
2129                 new_device_list[num_valid_devices++] = device;
2130         }
2131
2132         pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices);
2133
2134 out:
2135         list_for_each_entry_safe(device, next, &new_device_list_head,
2136                 new_device_list_entry) {
2137                 if (device->keep_device)
2138                         continue;
2139                 list_del(&device->new_device_list_entry);
2140                 pqi_free_device(device);
2141         }
2142
2143         kfree(new_device_list);
2144         kfree(physdev_list);
2145         kfree(logdev_list);
2146         kfree(id_phys);
2147
2148         return rc;
2149 }
2150
2151 static void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2152 {
2153         unsigned long flags;
2154         struct pqi_scsi_dev *device;
2155
2156         while (1) {
2157                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
2158
2159                 device = list_first_entry_or_null(&ctrl_info->scsi_device_list,
2160                         struct pqi_scsi_dev, scsi_device_list_entry);
2161                 if (device)
2162                         list_del(&device->scsi_device_list_entry);
2163
2164                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
2165                         flags);
2166
2167                 if (!device)
2168                         break;
2169
2170                 if (pqi_is_device_added(device))
2171                         pqi_remove_device(ctrl_info, device);
2172                 pqi_free_device(device);
2173         }
2174 }
2175
2176 static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
2177 {
2178         int rc = 0;
2179
2180         if (pqi_ctrl_offline(ctrl_info))
2181                 return -ENXIO;
2182
2183         if (!mutex_trylock(&ctrl_info->scan_mutex)) {
2184                 pqi_schedule_rescan_worker_delayed(ctrl_info);
2185                 rc = -EINPROGRESS;
2186         } else {
2187                 rc = pqi_update_scsi_devices(ctrl_info);
2188                 if (rc)
2189                         pqi_schedule_rescan_worker_delayed(ctrl_info);
2190                 mutex_unlock(&ctrl_info->scan_mutex);
2191         }
2192
2193         return rc;
2194 }
2195
2196 static void pqi_scan_start(struct Scsi_Host *shost)
2197 {
2198         struct pqi_ctrl_info *ctrl_info;
2199
2200         ctrl_info = shost_to_hba(shost);
2201         if (pqi_ctrl_in_ofa(ctrl_info))
2202                 return;
2203
2204         pqi_scan_scsi_devices(ctrl_info);
2205 }
2206
2207 /* Returns TRUE if scan is finished. */
2208
2209 static int pqi_scan_finished(struct Scsi_Host *shost,
2210         unsigned long elapsed_time)
2211 {
2212         struct pqi_ctrl_info *ctrl_info;
2213
2214         ctrl_info = shost_priv(shost);
2215
2216         return !mutex_is_locked(&ctrl_info->scan_mutex);
2217 }
2218
2219 static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info)
2220 {
2221         mutex_lock(&ctrl_info->scan_mutex);
2222         mutex_unlock(&ctrl_info->scan_mutex);
2223 }
2224
2225 static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info)
2226 {
2227         mutex_lock(&ctrl_info->lun_reset_mutex);
2228         mutex_unlock(&ctrl_info->lun_reset_mutex);
2229 }
2230
2231 static void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info)
2232 {
2233         mutex_lock(&ctrl_info->ofa_mutex);
2234         mutex_unlock(&ctrl_info->ofa_mutex);
2235 }
2236
2237 static inline void pqi_set_encryption_info(
2238         struct pqi_encryption_info *encryption_info, struct raid_map *raid_map,
2239         u64 first_block)
2240 {
2241         u32 volume_blk_size;
2242
2243         /*
2244          * Set the encryption tweak values based on logical block address.
2245          * If the block size is 512, the tweak value is equal to the LBA.
2246          * For other block sizes, tweak value is (LBA * block size) / 512.
2247          */
2248         volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size);
2249         if (volume_blk_size != 512)
2250                 first_block = (first_block * volume_blk_size) / 512;
2251
2252         encryption_info->data_encryption_key_index =
2253                 get_unaligned_le16(&raid_map->data_encryption_key_index);
2254         encryption_info->encrypt_tweak_lower = lower_32_bits(first_block);
2255         encryption_info->encrypt_tweak_upper = upper_32_bits(first_block);
2256 }
2257
2258 /*
2259  * Attempt to perform RAID bypass mapping for a logical volume I/O.
2260  */
2261
2262 #define PQI_RAID_BYPASS_INELIGIBLE      1
2263
2264 static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
2265         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
2266         struct pqi_queue_group *queue_group)
2267 {
2268         struct raid_map *raid_map;
2269         bool is_write = false;
2270         u32 map_index;
2271         u64 first_block;
2272         u64 last_block;
2273         u32 block_cnt;
2274         u32 blocks_per_row;
2275         u64 first_row;
2276         u64 last_row;
2277         u32 first_row_offset;
2278         u32 last_row_offset;
2279         u32 first_column;
2280         u32 last_column;
2281         u64 r0_first_row;
2282         u64 r0_last_row;
2283         u32 r5or6_blocks_per_row;
2284         u64 r5or6_first_row;
2285         u64 r5or6_last_row;
2286         u32 r5or6_first_row_offset;
2287         u32 r5or6_last_row_offset;
2288         u32 r5or6_first_column;
2289         u32 r5or6_last_column;
2290         u16 data_disks_per_row;
2291         u32 total_disks_per_row;
2292         u16 layout_map_count;
2293         u32 stripesize;
2294         u16 strip_size;
2295         u32 first_group;
2296         u32 last_group;
2297         u32 current_group;
2298         u32 map_row;
2299         u32 aio_handle;
2300         u64 disk_block;
2301         u32 disk_block_cnt;
2302         u8 cdb[16];
2303         u8 cdb_length;
2304         int offload_to_mirror;
2305         struct pqi_encryption_info *encryption_info_ptr;
2306         struct pqi_encryption_info encryption_info;
2307 #if BITS_PER_LONG == 32
2308         u64 tmpdiv;
2309 #endif
2310
2311         /* Check for valid opcode, get LBA and block count. */
2312         switch (scmd->cmnd[0]) {
2313         case WRITE_6:
2314                 is_write = true;
2315                 /* fall through */
2316         case READ_6:
2317                 first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
2318                         (scmd->cmnd[2] << 8) | scmd->cmnd[3]);
2319                 block_cnt = (u32)scmd->cmnd[4];
2320                 if (block_cnt == 0)
2321                         block_cnt = 256;
2322                 break;
2323         case WRITE_10:
2324                 is_write = true;
2325                 /* fall through */
2326         case READ_10:
2327                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2328                 block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
2329                 break;
2330         case WRITE_12:
2331                 is_write = true;
2332                 /* fall through */
2333         case READ_12:
2334                 first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
2335                 block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
2336                 break;
2337         case WRITE_16:
2338                 is_write = true;
2339                 /* fall through */
2340         case READ_16:
2341                 first_block = get_unaligned_be64(&scmd->cmnd[2]);
2342                 block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
2343                 break;
2344         default:
2345                 /* Process via normal I/O path. */
2346                 return PQI_RAID_BYPASS_INELIGIBLE;
2347         }
2348
2349         /* Check for write to non-RAID-0. */
2350         if (is_write && device->raid_level != SA_RAID_0)
2351                 return PQI_RAID_BYPASS_INELIGIBLE;
2352
2353         if (unlikely(block_cnt == 0))
2354                 return PQI_RAID_BYPASS_INELIGIBLE;
2355
2356         last_block = first_block + block_cnt - 1;
2357         raid_map = device->raid_map;
2358
2359         /* Check for invalid block or wraparound. */
2360         if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) ||
2361                 last_block < first_block)
2362                 return PQI_RAID_BYPASS_INELIGIBLE;
2363
2364         data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row);
2365         strip_size = get_unaligned_le16(&raid_map->strip_size);
2366         layout_map_count = get_unaligned_le16(&raid_map->layout_map_count);
2367
2368         /* Calculate stripe information for the request. */
2369         blocks_per_row = data_disks_per_row * strip_size;
2370 #if BITS_PER_LONG == 32
2371         tmpdiv = first_block;
2372         do_div(tmpdiv, blocks_per_row);
2373         first_row = tmpdiv;
2374         tmpdiv = last_block;
2375         do_div(tmpdiv, blocks_per_row);
2376         last_row = tmpdiv;
2377         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2378         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2379         tmpdiv = first_row_offset;
2380         do_div(tmpdiv, strip_size);
2381         first_column = tmpdiv;
2382         tmpdiv = last_row_offset;
2383         do_div(tmpdiv, strip_size);
2384         last_column = tmpdiv;
2385 #else
2386         first_row = first_block / blocks_per_row;
2387         last_row = last_block / blocks_per_row;
2388         first_row_offset = (u32)(first_block - (first_row * blocks_per_row));
2389         last_row_offset = (u32)(last_block - (last_row * blocks_per_row));
2390         first_column = first_row_offset / strip_size;
2391         last_column = last_row_offset / strip_size;
2392 #endif
2393
2394         /* If this isn't a single row/column then give to the controller. */
2395         if (first_row != last_row || first_column != last_column)
2396                 return PQI_RAID_BYPASS_INELIGIBLE;
2397
2398         /* Proceeding with driver mapping. */
2399         total_disks_per_row = data_disks_per_row +
2400                 get_unaligned_le16(&raid_map->metadata_disks_per_row);
2401         map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2402                 get_unaligned_le16(&raid_map->row_cnt);
2403         map_index = (map_row * total_disks_per_row) + first_column;
2404
2405         /* RAID 1 */
2406         if (device->raid_level == SA_RAID_1) {
2407                 if (device->offload_to_mirror)
2408                         map_index += data_disks_per_row;
2409                 device->offload_to_mirror = !device->offload_to_mirror;
2410         } else if (device->raid_level == SA_RAID_ADM) {
2411                 /* RAID ADM */
2412                 /*
2413                  * Handles N-way mirrors  (R1-ADM) and R10 with # of drives
2414                  * divisible by 3.
2415                  */
2416                 offload_to_mirror = device->offload_to_mirror;
2417                 if (offload_to_mirror == 0)  {
2418                         /* use physical disk in the first mirrored group. */
2419                         map_index %= data_disks_per_row;
2420                 } else {
2421                         do {
2422                                 /*
2423                                  * Determine mirror group that map_index
2424                                  * indicates.
2425                                  */
2426                                 current_group = map_index / data_disks_per_row;
2427
2428                                 if (offload_to_mirror != current_group) {
2429                                         if (current_group <
2430                                                 layout_map_count - 1) {
2431                                                 /*
2432                                                  * Select raid index from
2433                                                  * next group.
2434                                                  */
2435                                                 map_index += data_disks_per_row;
2436                                                 current_group++;
2437                                         } else {
2438                                                 /*
2439                                                  * Select raid index from first
2440                                                  * group.
2441                                                  */
2442                                                 map_index %= data_disks_per_row;
2443                                                 current_group = 0;
2444                                         }
2445                                 }
2446                         } while (offload_to_mirror != current_group);
2447                 }
2448
2449                 /* Set mirror group to use next time. */
2450                 offload_to_mirror =
2451                         (offload_to_mirror >= layout_map_count - 1) ?
2452                                 0 : offload_to_mirror + 1;
2453                 WARN_ON(offload_to_mirror >= layout_map_count);
2454                 device->offload_to_mirror = offload_to_mirror;
2455                 /*
2456                  * Avoid direct use of device->offload_to_mirror within this
2457                  * function since multiple threads might simultaneously
2458                  * increment it beyond the range of device->layout_map_count -1.
2459                  */
2460         } else if ((device->raid_level == SA_RAID_5 ||
2461                 device->raid_level == SA_RAID_6) && layout_map_count > 1) {
2462                 /* RAID 50/60 */
2463                 /* Verify first and last block are in same RAID group */
2464                 r5or6_blocks_per_row = strip_size * data_disks_per_row;
2465                 stripesize = r5or6_blocks_per_row * layout_map_count;
2466 #if BITS_PER_LONG == 32
2467                 tmpdiv = first_block;
2468                 first_group = do_div(tmpdiv, stripesize);
2469                 tmpdiv = first_group;
2470                 do_div(tmpdiv, r5or6_blocks_per_row);
2471                 first_group = tmpdiv;
2472                 tmpdiv = last_block;
2473                 last_group = do_div(tmpdiv, stripesize);
2474                 tmpdiv = last_group;
2475                 do_div(tmpdiv, r5or6_blocks_per_row);
2476                 last_group = tmpdiv;
2477 #else
2478                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
2479                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
2480 #endif
2481                 if (first_group != last_group)
2482                         return PQI_RAID_BYPASS_INELIGIBLE;
2483
2484                 /* Verify request is in a single row of RAID 5/6 */
2485 #if BITS_PER_LONG == 32
2486                 tmpdiv = first_block;
2487                 do_div(tmpdiv, stripesize);
2488                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
2489                 tmpdiv = last_block;
2490                 do_div(tmpdiv, stripesize);
2491                 r5or6_last_row = r0_last_row = tmpdiv;
2492 #else
2493                 first_row = r5or6_first_row = r0_first_row =
2494                         first_block / stripesize;
2495                 r5or6_last_row = r0_last_row = last_block / stripesize;
2496 #endif
2497                 if (r5or6_first_row != r5or6_last_row)
2498                         return PQI_RAID_BYPASS_INELIGIBLE;
2499
2500                 /* Verify request is in a single column */
2501 #if BITS_PER_LONG == 32
2502                 tmpdiv = first_block;
2503                 first_row_offset = do_div(tmpdiv, stripesize);
2504                 tmpdiv = first_row_offset;
2505                 first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row);
2506                 r5or6_first_row_offset = first_row_offset;
2507                 tmpdiv = last_block;
2508                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
2509                 tmpdiv = r5or6_last_row_offset;
2510                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
2511                 tmpdiv = r5or6_first_row_offset;
2512                 do_div(tmpdiv, strip_size);
2513                 first_column = r5or6_first_column = tmpdiv;
2514                 tmpdiv = r5or6_last_row_offset;
2515                 do_div(tmpdiv, strip_size);
2516                 r5or6_last_column = tmpdiv;
2517 #else
2518                 first_row_offset = r5or6_first_row_offset =
2519                         (u32)((first_block % stripesize) %
2520                         r5or6_blocks_per_row);
2521
2522                 r5or6_last_row_offset =
2523                         (u32)((last_block % stripesize) %
2524                         r5or6_blocks_per_row);
2525
2526                 first_column = r5or6_first_row_offset / strip_size;
2527                 r5or6_first_column = first_column;
2528                 r5or6_last_column = r5or6_last_row_offset / strip_size;
2529 #endif
2530                 if (r5or6_first_column != r5or6_last_column)
2531                         return PQI_RAID_BYPASS_INELIGIBLE;
2532
2533                 /* Request is eligible */
2534                 map_row =
2535                         ((u32)(first_row >> raid_map->parity_rotation_shift)) %
2536                         get_unaligned_le16(&raid_map->row_cnt);
2537
2538                 map_index = (first_group *
2539                         (get_unaligned_le16(&raid_map->row_cnt) *
2540                         total_disks_per_row)) +
2541                         (map_row * total_disks_per_row) + first_column;
2542         }
2543
2544         aio_handle = raid_map->disk_data[map_index].aio_handle;
2545         disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) +
2546                 first_row * strip_size +
2547                 (first_row_offset - first_column * strip_size);
2548         disk_block_cnt = block_cnt;
2549
2550         /* Handle differing logical/physical block sizes. */
2551         if (raid_map->phys_blk_shift) {
2552                 disk_block <<= raid_map->phys_blk_shift;
2553                 disk_block_cnt <<= raid_map->phys_blk_shift;
2554         }
2555
2556         if (unlikely(disk_block_cnt > 0xffff))
2557                 return PQI_RAID_BYPASS_INELIGIBLE;
2558
2559         /* Build the new CDB for the physical disk I/O. */
2560         if (disk_block > 0xffffffff) {
2561                 cdb[0] = is_write ? WRITE_16 : READ_16;
2562                 cdb[1] = 0;
2563                 put_unaligned_be64(disk_block, &cdb[2]);
2564                 put_unaligned_be32(disk_block_cnt, &cdb[10]);
2565                 cdb[14] = 0;
2566                 cdb[15] = 0;
2567                 cdb_length = 16;
2568         } else {
2569                 cdb[0] = is_write ? WRITE_10 : READ_10;
2570                 cdb[1] = 0;
2571                 put_unaligned_be32((u32)disk_block, &cdb[2]);
2572                 cdb[6] = 0;
2573                 put_unaligned_be16((u16)disk_block_cnt, &cdb[7]);
2574                 cdb[9] = 0;
2575                 cdb_length = 10;
2576         }
2577
2578         if (get_unaligned_le16(&raid_map->flags) &
2579                 RAID_MAP_ENCRYPTION_ENABLED) {
2580                 pqi_set_encryption_info(&encryption_info, raid_map,
2581                         first_block);
2582                 encryption_info_ptr = &encryption_info;
2583         } else {
2584                 encryption_info_ptr = NULL;
2585         }
2586
2587         return pqi_aio_submit_io(ctrl_info, scmd, aio_handle,
2588                 cdb, cdb_length, queue_group, encryption_info_ptr, true);
2589 }
2590
2591 #define PQI_STATUS_IDLE         0x0
2592
2593 #define PQI_CREATE_ADMIN_QUEUE_PAIR     1
2594 #define PQI_DELETE_ADMIN_QUEUE_PAIR     2
2595
2596 #define PQI_DEVICE_STATE_POWER_ON_AND_RESET             0x0
2597 #define PQI_DEVICE_STATE_STATUS_AVAILABLE               0x1
2598 #define PQI_DEVICE_STATE_ALL_REGISTERS_READY            0x2
2599 #define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY         0x3
2600 #define PQI_DEVICE_STATE_ERROR                          0x4
2601
2602 #define PQI_MODE_READY_TIMEOUT_SECS             30
2603 #define PQI_MODE_READY_POLL_INTERVAL_MSECS      1
2604
2605 static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info)
2606 {
2607         struct pqi_device_registers __iomem *pqi_registers;
2608         unsigned long timeout;
2609         u64 signature;
2610         u8 status;
2611
2612         pqi_registers = ctrl_info->pqi_registers;
2613         timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies;
2614
2615         while (1) {
2616                 signature = readq(&pqi_registers->signature);
2617                 if (memcmp(&signature, PQI_DEVICE_SIGNATURE,
2618                         sizeof(signature)) == 0)
2619                         break;
2620                 if (time_after(jiffies, timeout)) {
2621                         dev_err(&ctrl_info->pci_dev->dev,
2622                                 "timed out waiting for PQI signature\n");
2623                         return -ETIMEDOUT;
2624                 }
2625                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2626         }
2627
2628         while (1) {
2629                 status = readb(&pqi_registers->function_and_status_code);
2630                 if (status == PQI_STATUS_IDLE)
2631                         break;
2632                 if (time_after(jiffies, timeout)) {
2633                         dev_err(&ctrl_info->pci_dev->dev,
2634                                 "timed out waiting for PQI IDLE\n");
2635                         return -ETIMEDOUT;
2636                 }
2637                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2638         }
2639
2640         while (1) {
2641                 if (readl(&pqi_registers->device_status) ==
2642                         PQI_DEVICE_STATE_ALL_REGISTERS_READY)
2643                         break;
2644                 if (time_after(jiffies, timeout)) {
2645                         dev_err(&ctrl_info->pci_dev->dev,
2646                                 "timed out waiting for PQI all registers ready\n");
2647                         return -ETIMEDOUT;
2648                 }
2649                 msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS);
2650         }
2651
2652         return 0;
2653 }
2654
2655 static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request)
2656 {
2657         struct pqi_scsi_dev *device;
2658
2659         device = io_request->scmd->device->hostdata;
2660         device->raid_bypass_enabled = false;
2661         device->aio_enabled = false;
2662 }
2663
2664 static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path)
2665 {
2666         struct pqi_ctrl_info *ctrl_info;
2667         struct pqi_scsi_dev *device;
2668
2669         device = sdev->hostdata;
2670         if (device->device_offline)
2671                 return;
2672
2673         device->device_offline = true;
2674         ctrl_info = shost_to_hba(sdev->host);
2675         pqi_schedule_rescan_worker(ctrl_info);
2676         dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n",
2677                 path, ctrl_info->scsi_host->host_no, device->bus,
2678                 device->target, device->lun);
2679 }
2680
2681 static void pqi_process_raid_io_error(struct pqi_io_request *io_request)
2682 {
2683         u8 scsi_status;
2684         u8 host_byte;
2685         struct scsi_cmnd *scmd;
2686         struct pqi_raid_error_info *error_info;
2687         size_t sense_data_length;
2688         int residual_count;
2689         int xfer_count;
2690         struct scsi_sense_hdr sshdr;
2691
2692         scmd = io_request->scmd;
2693         if (!scmd)
2694                 return;
2695
2696         error_info = io_request->error_info;
2697         scsi_status = error_info->status;
2698         host_byte = DID_OK;
2699
2700         switch (error_info->data_out_result) {
2701         case PQI_DATA_IN_OUT_GOOD:
2702                 break;
2703         case PQI_DATA_IN_OUT_UNDERFLOW:
2704                 xfer_count =
2705                         get_unaligned_le32(&error_info->data_out_transferred);
2706                 residual_count = scsi_bufflen(scmd) - xfer_count;
2707                 scsi_set_resid(scmd, residual_count);
2708                 if (xfer_count < scmd->underflow)
2709                         host_byte = DID_SOFT_ERROR;
2710                 break;
2711         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
2712         case PQI_DATA_IN_OUT_ABORTED:
2713                 host_byte = DID_ABORT;
2714                 break;
2715         case PQI_DATA_IN_OUT_TIMEOUT:
2716                 host_byte = DID_TIME_OUT;
2717                 break;
2718         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
2719         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
2720         case PQI_DATA_IN_OUT_BUFFER_ERROR:
2721         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
2722         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
2723         case PQI_DATA_IN_OUT_ERROR:
2724         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
2725         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
2726         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
2727         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
2728         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
2729         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
2730         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
2731         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
2732         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
2733         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
2734         default:
2735                 host_byte = DID_ERROR;
2736                 break;
2737         }
2738
2739         sense_data_length = get_unaligned_le16(&error_info->sense_data_length);
2740         if (sense_data_length == 0)
2741                 sense_data_length =
2742                         get_unaligned_le16(&error_info->response_data_length);
2743         if (sense_data_length) {
2744                 if (sense_data_length > sizeof(error_info->data))
2745                         sense_data_length = sizeof(error_info->data);
2746
2747                 if (scsi_status == SAM_STAT_CHECK_CONDITION &&
2748                         scsi_normalize_sense(error_info->data,
2749                                 sense_data_length, &sshdr) &&
2750                                 sshdr.sense_key == HARDWARE_ERROR &&
2751                                 sshdr.asc == 0x3e) {
2752                         struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host);
2753                         struct pqi_scsi_dev *device = scmd->device->hostdata;
2754
2755                         switch (sshdr.ascq) {
2756                         case 0x1: /* LOGICAL UNIT FAILURE */
2757                                 if (printk_ratelimit())
2758                                         scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n",
2759                                                 ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
2760                                 pqi_take_device_offline(scmd->device, "RAID");
2761                                 host_byte = DID_NO_CONNECT;
2762                                 break;
2763
2764                         default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */
2765                                 if (printk_ratelimit())
2766                                         scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n",
2767                                                 sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun);
2768                                 break;
2769                         }
2770                 }
2771
2772                 if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2773                         sense_data_length = SCSI_SENSE_BUFFERSIZE;
2774                 memcpy(scmd->sense_buffer, error_info->data,
2775                         sense_data_length);
2776         }
2777
2778         scmd->result = scsi_status;
2779         set_host_byte(scmd, host_byte);
2780 }
2781
2782 static void pqi_process_aio_io_error(struct pqi_io_request *io_request)
2783 {
2784         u8 scsi_status;
2785         u8 host_byte;
2786         struct scsi_cmnd *scmd;
2787         struct pqi_aio_error_info *error_info;
2788         size_t sense_data_length;
2789         int residual_count;
2790         int xfer_count;
2791         bool device_offline;
2792
2793         scmd = io_request->scmd;
2794         error_info = io_request->error_info;
2795         host_byte = DID_OK;
2796         sense_data_length = 0;
2797         device_offline = false;
2798
2799         switch (error_info->service_response) {
2800         case PQI_AIO_SERV_RESPONSE_COMPLETE:
2801                 scsi_status = error_info->status;
2802                 break;
2803         case PQI_AIO_SERV_RESPONSE_FAILURE:
2804                 switch (error_info->status) {
2805                 case PQI_AIO_STATUS_IO_ABORTED:
2806                         scsi_status = SAM_STAT_TASK_ABORTED;
2807                         break;
2808                 case PQI_AIO_STATUS_UNDERRUN:
2809                         scsi_status = SAM_STAT_GOOD;
2810                         residual_count = get_unaligned_le32(
2811                                                 &error_info->residual_count);
2812                         scsi_set_resid(scmd, residual_count);
2813                         xfer_count = scsi_bufflen(scmd) - residual_count;
2814                         if (xfer_count < scmd->underflow)
2815                                 host_byte = DID_SOFT_ERROR;
2816                         break;
2817                 case PQI_AIO_STATUS_OVERRUN:
2818                         scsi_status = SAM_STAT_GOOD;
2819                         break;
2820                 case PQI_AIO_STATUS_AIO_PATH_DISABLED:
2821                         pqi_aio_path_disabled(io_request);
2822                         scsi_status = SAM_STAT_GOOD;
2823                         io_request->status = -EAGAIN;
2824                         break;
2825                 case PQI_AIO_STATUS_NO_PATH_TO_DEVICE:
2826                 case PQI_AIO_STATUS_INVALID_DEVICE:
2827                         if (!io_request->raid_bypass) {
2828                                 device_offline = true;
2829                                 pqi_take_device_offline(scmd->device, "AIO");
2830                                 host_byte = DID_NO_CONNECT;
2831                         }
2832                         scsi_status = SAM_STAT_CHECK_CONDITION;
2833                         break;
2834                 case PQI_AIO_STATUS_IO_ERROR:
2835                 default:
2836                         scsi_status = SAM_STAT_CHECK_CONDITION;
2837                         break;
2838                 }
2839                 break;
2840         case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE:
2841         case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED:
2842                 scsi_status = SAM_STAT_GOOD;
2843                 break;
2844         case PQI_AIO_SERV_RESPONSE_TMF_REJECTED:
2845         case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN:
2846         default:
2847                 scsi_status = SAM_STAT_CHECK_CONDITION;
2848                 break;
2849         }
2850
2851         if (error_info->data_present) {
2852                 sense_data_length =
2853                         get_unaligned_le16(&error_info->data_length);
2854                 if (sense_data_length) {
2855                         if (sense_data_length > sizeof(error_info->data))
2856                                 sense_data_length = sizeof(error_info->data);
2857                         if (sense_data_length > SCSI_SENSE_BUFFERSIZE)
2858                                 sense_data_length = SCSI_SENSE_BUFFERSIZE;
2859                         memcpy(scmd->sense_buffer, error_info->data,
2860                                 sense_data_length);
2861                 }
2862         }
2863
2864         if (device_offline && sense_data_length == 0)
2865                 scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR,
2866                         0x3e, 0x1);
2867
2868         scmd->result = scsi_status;
2869         set_host_byte(scmd, host_byte);
2870 }
2871
2872 static void pqi_process_io_error(unsigned int iu_type,
2873         struct pqi_io_request *io_request)
2874 {
2875         switch (iu_type) {
2876         case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2877                 pqi_process_raid_io_error(io_request);
2878                 break;
2879         case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2880                 pqi_process_aio_io_error(io_request);
2881                 break;
2882         }
2883 }
2884
2885 static int pqi_interpret_task_management_response(
2886         struct pqi_task_management_response *response)
2887 {
2888         int rc;
2889
2890         switch (response->response_code) {
2891         case SOP_TMF_COMPLETE:
2892         case SOP_TMF_FUNCTION_SUCCEEDED:
2893                 rc = 0;
2894                 break;
2895         case SOP_TMF_REJECTED:
2896                 rc = -EAGAIN;
2897                 break;
2898         default:
2899                 rc = -EIO;
2900                 break;
2901         }
2902
2903         return rc;
2904 }
2905
2906 static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
2907         struct pqi_queue_group *queue_group)
2908 {
2909         unsigned int num_responses;
2910         pqi_index_t oq_pi;
2911         pqi_index_t oq_ci;
2912         struct pqi_io_request *io_request;
2913         struct pqi_io_response *response;
2914         u16 request_id;
2915
2916         num_responses = 0;
2917         oq_ci = queue_group->oq_ci_copy;
2918
2919         while (1) {
2920                 oq_pi = readl(queue_group->oq_pi);
2921                 if (oq_pi == oq_ci)
2922                         break;
2923
2924                 num_responses++;
2925                 response = queue_group->oq_element_array +
2926                         (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
2927
2928                 request_id = get_unaligned_le16(&response->request_id);
2929                 WARN_ON(request_id >= ctrl_info->max_io_slots);
2930
2931                 io_request = &ctrl_info->io_request_pool[request_id];
2932                 WARN_ON(atomic_read(&io_request->refcount) == 0);
2933
2934                 switch (response->header.iu_type) {
2935                 case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
2936                 case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
2937                         if (io_request->scmd)
2938                                 io_request->scmd->result = 0;
2939                         /* fall through */
2940                 case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
2941                         break;
2942                 case PQI_RESPONSE_IU_VENDOR_GENERAL:
2943                         io_request->status =
2944                                 get_unaligned_le16(
2945                                 &((struct pqi_vendor_general_response *)
2946                                         response)->status);
2947                         break;
2948                 case PQI_RESPONSE_IU_TASK_MANAGEMENT:
2949                         io_request->status =
2950                                 pqi_interpret_task_management_response(
2951                                         (void *)response);
2952                         break;
2953                 case PQI_RESPONSE_IU_AIO_PATH_DISABLED:
2954                         pqi_aio_path_disabled(io_request);
2955                         io_request->status = -EAGAIN;
2956                         break;
2957                 case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR:
2958                 case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR:
2959                         io_request->error_info = ctrl_info->error_buffer +
2960                                 (get_unaligned_le16(&response->error_index) *
2961                                 PQI_ERROR_BUFFER_ELEMENT_LENGTH);
2962                         pqi_process_io_error(response->header.iu_type,
2963                                 io_request);
2964                         break;
2965                 default:
2966                         dev_err(&ctrl_info->pci_dev->dev,
2967                                 "unexpected IU type: 0x%x\n",
2968                                 response->header.iu_type);
2969                         break;
2970                 }
2971
2972                 io_request->io_complete_callback(io_request,
2973                         io_request->context);
2974
2975                 /*
2976                  * Note that the I/O request structure CANNOT BE TOUCHED after
2977                  * returning from the I/O completion callback!
2978                  */
2979
2980                 oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq;
2981         }
2982
2983         if (num_responses) {
2984                 queue_group->oq_ci_copy = oq_ci;
2985                 writel(oq_ci, queue_group->oq_ci);
2986         }
2987
2988         return num_responses;
2989 }
2990
2991 static inline unsigned int pqi_num_elements_free(unsigned int pi,
2992         unsigned int ci, unsigned int elements_in_queue)
2993 {
2994         unsigned int num_elements_used;
2995
2996         if (pi >= ci)
2997                 num_elements_used = pi - ci;
2998         else
2999                 num_elements_used = elements_in_queue - ci + pi;
3000
3001         return elements_in_queue - num_elements_used - 1;
3002 }
3003
3004 static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info,
3005         struct pqi_event_acknowledge_request *iu, size_t iu_length)
3006 {
3007         pqi_index_t iq_pi;
3008         pqi_index_t iq_ci;
3009         unsigned long flags;
3010         void *next_element;
3011         struct pqi_queue_group *queue_group;
3012
3013         queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP];
3014         put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id);
3015
3016         while (1) {
3017                 spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
3018
3019                 iq_pi = queue_group->iq_pi_copy[RAID_PATH];
3020                 iq_ci = readl(queue_group->iq_ci[RAID_PATH]);
3021
3022                 if (pqi_num_elements_free(iq_pi, iq_ci,
3023                         ctrl_info->num_elements_per_iq))
3024                         break;
3025
3026                 spin_unlock_irqrestore(
3027                         &queue_group->submit_lock[RAID_PATH], flags);
3028
3029                 if (pqi_ctrl_offline(ctrl_info))
3030                         return;
3031         }
3032
3033         next_element = queue_group->iq_element_array[RAID_PATH] +
3034                 (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3035
3036         memcpy(next_element, iu, iu_length);
3037
3038         iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq;
3039         queue_group->iq_pi_copy[RAID_PATH] = iq_pi;
3040
3041         /*
3042          * This write notifies the controller that an IU is available to be
3043          * processed.
3044          */
3045         writel(iq_pi, queue_group->iq_pi[RAID_PATH]);
3046
3047         spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags);
3048 }
3049
3050 static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info,
3051         struct pqi_event *event)
3052 {
3053         struct pqi_event_acknowledge_request request;
3054
3055         memset(&request, 0, sizeof(request));
3056
3057         request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT;
3058         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
3059                 &request.header.iu_length);
3060         request.event_type = event->event_type;
3061         request.event_id = event->event_id;
3062         request.additional_event_id = event->additional_event_id;
3063
3064         pqi_send_event_ack(ctrl_info, &request, sizeof(request));
3065 }
3066
3067 #define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS              30
3068 #define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS        1
3069
3070 static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status(
3071         struct pqi_ctrl_info *ctrl_info)
3072 {
3073         unsigned long timeout;
3074         u8 status;
3075
3076         timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies;
3077
3078         while (1) {
3079                 status = pqi_read_soft_reset_status(ctrl_info);
3080                 if (status & PQI_SOFT_RESET_INITIATE)
3081                         return RESET_INITIATE_DRIVER;
3082
3083                 if (status & PQI_SOFT_RESET_ABORT)
3084                         return RESET_ABORT;
3085
3086                 if (time_after(jiffies, timeout)) {
3087                         dev_err(&ctrl_info->pci_dev->dev,
3088                                 "timed out waiting for soft reset status\n");
3089                         return RESET_TIMEDOUT;
3090                 }
3091
3092                 if (!sis_is_firmware_running(ctrl_info))
3093                         return RESET_NORESPONSE;
3094
3095                 ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS);
3096         }
3097 }
3098
3099 static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info,
3100                 enum pqi_soft_reset_status reset_status)
3101 {
3102         int rc;
3103
3104         switch (reset_status) {
3105         case RESET_INITIATE_DRIVER:
3106                 /* fall through */
3107         case RESET_TIMEDOUT:
3108                 dev_info(&ctrl_info->pci_dev->dev,
3109                         "resetting controller %u\n", ctrl_info->ctrl_id);
3110                 sis_soft_reset(ctrl_info);
3111                 /* fall through */
3112         case RESET_INITIATE_FIRMWARE:
3113                 rc = pqi_ofa_ctrl_restart(ctrl_info);
3114                 pqi_ofa_free_host_buffer(ctrl_info);
3115                 dev_info(&ctrl_info->pci_dev->dev,
3116                         "Online Firmware Activation for controller %u: %s\n",
3117                         ctrl_info->ctrl_id, rc == 0 ? "SUCCESS" : "FAILED");
3118                 break;
3119         case RESET_ABORT:
3120                 pqi_ofa_ctrl_unquiesce(ctrl_info);
3121                 dev_info(&ctrl_info->pci_dev->dev,
3122                         "Online Firmware Activation for controller %u: %s\n",
3123                         ctrl_info->ctrl_id, "ABORTED");
3124                 break;
3125         case RESET_NORESPONSE:
3126                 pqi_ofa_free_host_buffer(ctrl_info);
3127                 pqi_take_ctrl_offline(ctrl_info);
3128                 break;
3129         }
3130 }
3131
3132 static void pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info,
3133         struct pqi_event *event)
3134 {
3135         u16 event_id;
3136         enum pqi_soft_reset_status status;
3137
3138         event_id = get_unaligned_le16(&event->event_id);
3139
3140         mutex_lock(&ctrl_info->ofa_mutex);
3141
3142         if (event_id == PQI_EVENT_OFA_QUIESCE) {
3143                 dev_info(&ctrl_info->pci_dev->dev,
3144                          "Received Online Firmware Activation quiesce event for controller %u\n",
3145                          ctrl_info->ctrl_id);
3146                 pqi_ofa_ctrl_quiesce(ctrl_info);
3147                 pqi_acknowledge_event(ctrl_info, event);
3148                 if (ctrl_info->soft_reset_handshake_supported) {
3149                         status = pqi_poll_for_soft_reset_status(ctrl_info);
3150                         pqi_process_soft_reset(ctrl_info, status);
3151                 } else {
3152                         pqi_process_soft_reset(ctrl_info,
3153                                         RESET_INITIATE_FIRMWARE);
3154                 }
3155
3156         } else if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3157                 pqi_acknowledge_event(ctrl_info, event);
3158                 pqi_ofa_setup_host_buffer(ctrl_info,
3159                         le32_to_cpu(event->ofa_bytes_requested));
3160                 pqi_ofa_host_memory_update(ctrl_info);
3161         } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3162                 pqi_ofa_free_host_buffer(ctrl_info);
3163                 pqi_acknowledge_event(ctrl_info, event);
3164                 dev_info(&ctrl_info->pci_dev->dev,
3165                          "Online Firmware Activation(%u) cancel reason : %u\n",
3166                          ctrl_info->ctrl_id, event->ofa_cancel_reason);
3167         }
3168
3169         mutex_unlock(&ctrl_info->ofa_mutex);
3170 }
3171
3172 static void pqi_event_worker(struct work_struct *work)
3173 {
3174         unsigned int i;
3175         struct pqi_ctrl_info *ctrl_info;
3176         struct pqi_event *event;
3177
3178         ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
3179
3180         pqi_ctrl_busy(ctrl_info);
3181         pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT);
3182         if (pqi_ctrl_offline(ctrl_info))
3183                 goto out;
3184
3185         pqi_schedule_rescan_worker_delayed(ctrl_info);
3186
3187         event = ctrl_info->events;
3188         for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
3189                 if (event->pending) {
3190                         event->pending = false;
3191                         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3192                                 pqi_ctrl_unbusy(ctrl_info);
3193                                 pqi_ofa_process_event(ctrl_info, event);
3194                                 return;
3195                         }
3196                         pqi_acknowledge_event(ctrl_info, event);
3197                 }
3198                 event++;
3199         }
3200
3201 out:
3202         pqi_ctrl_unbusy(ctrl_info);
3203 }
3204
3205 #define PQI_HEARTBEAT_TIMER_INTERVAL    (10 * PQI_HZ)
3206
3207 static void pqi_heartbeat_timer_handler(struct timer_list *t)
3208 {
3209         int num_interrupts;
3210         u32 heartbeat_count;
3211         struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t,
3212                                                      heartbeat_timer);
3213
3214         pqi_check_ctrl_health(ctrl_info);
3215         if (pqi_ctrl_offline(ctrl_info))
3216                 return;
3217
3218         num_interrupts = atomic_read(&ctrl_info->num_interrupts);
3219         heartbeat_count = pqi_read_heartbeat_counter(ctrl_info);
3220
3221         if (num_interrupts == ctrl_info->previous_num_interrupts) {
3222                 if (heartbeat_count == ctrl_info->previous_heartbeat_count) {
3223                         dev_err(&ctrl_info->pci_dev->dev,
3224                                 "no heartbeat detected - last heartbeat count: %u\n",
3225                                 heartbeat_count);
3226                         pqi_take_ctrl_offline(ctrl_info);
3227                         return;
3228                 }
3229         } else {
3230                 ctrl_info->previous_num_interrupts = num_interrupts;
3231         }
3232
3233         ctrl_info->previous_heartbeat_count = heartbeat_count;
3234         mod_timer(&ctrl_info->heartbeat_timer,
3235                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
3236 }
3237
3238 static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3239 {
3240         if (!ctrl_info->heartbeat_counter)
3241                 return;
3242
3243         ctrl_info->previous_num_interrupts =
3244                 atomic_read(&ctrl_info->num_interrupts);
3245         ctrl_info->previous_heartbeat_count =
3246                 pqi_read_heartbeat_counter(ctrl_info);
3247
3248         ctrl_info->heartbeat_timer.expires =
3249                 jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
3250         add_timer(&ctrl_info->heartbeat_timer);
3251 }
3252
3253 static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
3254 {
3255         del_timer_sync(&ctrl_info->heartbeat_timer);
3256 }
3257
3258 static inline int pqi_event_type_to_event_index(unsigned int event_type)
3259 {
3260         int index;
3261
3262         for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++)
3263                 if (event_type == pqi_supported_event_types[index])
3264                         return index;
3265
3266         return -1;
3267 }
3268
3269 static inline bool pqi_is_supported_event(unsigned int event_type)
3270 {
3271         return pqi_event_type_to_event_index(event_type) != -1;
3272 }
3273
3274 static void pqi_ofa_capture_event_payload(struct pqi_event *event,
3275         struct pqi_event_response *response)
3276 {
3277         u16 event_id;
3278
3279         event_id = get_unaligned_le16(&event->event_id);
3280
3281         if (event->event_type == PQI_EVENT_TYPE_OFA) {
3282                 if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) {
3283                         event->ofa_bytes_requested =
3284                         response->data.ofa_memory_allocation.bytes_requested;
3285                 } else if (event_id == PQI_EVENT_OFA_CANCELLED) {
3286                         event->ofa_cancel_reason =
3287                         response->data.ofa_cancelled.reason;
3288                 }
3289         }
3290 }
3291
3292 static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
3293 {
3294         unsigned int num_events;
3295         pqi_index_t oq_pi;
3296         pqi_index_t oq_ci;
3297         struct pqi_event_queue *event_queue;
3298         struct pqi_event_response *response;
3299         struct pqi_event *event;
3300         int event_index;
3301
3302         event_queue = &ctrl_info->event_queue;
3303         num_events = 0;
3304         oq_ci = event_queue->oq_ci_copy;
3305
3306         while (1) {
3307                 oq_pi = readl(event_queue->oq_pi);
3308                 if (oq_pi == oq_ci)
3309                         break;
3310
3311                 num_events++;
3312                 response = event_queue->oq_element_array +
3313                         (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH);
3314
3315                 event_index =
3316                         pqi_event_type_to_event_index(response->event_type);
3317
3318                 if (event_index >= 0) {
3319                         if (response->request_acknowlege) {
3320                                 event = &ctrl_info->events[event_index];
3321                                 event->pending = true;
3322                                 event->event_type = response->event_type;
3323                                 event->event_id = response->event_id;
3324                                 event->additional_event_id =
3325                                         response->additional_event_id;
3326                                 pqi_ofa_capture_event_payload(event, response);
3327                         }
3328                 }
3329
3330                 oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS;
3331         }
3332
3333         if (num_events) {
3334                 event_queue->oq_ci_copy = oq_ci;
3335                 writel(oq_ci, event_queue->oq_ci);
3336                 schedule_work(&ctrl_info->event_work);
3337         }
3338
3339         return num_events;
3340 }
3341
3342 #define PQI_LEGACY_INTX_MASK    0x1
3343
3344 static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info,
3345                                                 bool enable_intx)
3346 {
3347         u32 intx_mask;
3348         struct pqi_device_registers __iomem *pqi_registers;
3349         volatile void __iomem *register_addr;
3350
3351         pqi_registers = ctrl_info->pqi_registers;
3352
3353         if (enable_intx)
3354                 register_addr = &pqi_registers->legacy_intx_mask_clear;
3355         else
3356                 register_addr = &pqi_registers->legacy_intx_mask_set;
3357
3358         intx_mask = readl(register_addr);
3359         intx_mask |= PQI_LEGACY_INTX_MASK;
3360         writel(intx_mask, register_addr);
3361 }
3362
3363 static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info,
3364         enum pqi_irq_mode new_mode)
3365 {
3366         switch (ctrl_info->irq_mode) {
3367         case IRQ_MODE_MSIX:
3368                 switch (new_mode) {
3369                 case IRQ_MODE_MSIX:
3370                         break;
3371                 case IRQ_MODE_INTX:
3372                         pqi_configure_legacy_intx(ctrl_info, true);
3373                         sis_enable_intx(ctrl_info);
3374                         break;
3375                 case IRQ_MODE_NONE:
3376                         break;
3377                 }
3378                 break;
3379         case IRQ_MODE_INTX:
3380                 switch (new_mode) {
3381                 case IRQ_MODE_MSIX:
3382                         pqi_configure_legacy_intx(ctrl_info, false);
3383                         sis_enable_msix(ctrl_info);
3384                         break;
3385                 case IRQ_MODE_INTX:
3386                         break;
3387                 case IRQ_MODE_NONE:
3388                         pqi_configure_legacy_intx(ctrl_info, false);
3389                         break;
3390                 }
3391                 break;
3392         case IRQ_MODE_NONE:
3393                 switch (new_mode) {
3394                 case IRQ_MODE_MSIX:
3395                         sis_enable_msix(ctrl_info);
3396                         break;
3397                 case IRQ_MODE_INTX:
3398                         pqi_configure_legacy_intx(ctrl_info, true);
3399                         sis_enable_intx(ctrl_info);
3400                         break;
3401                 case IRQ_MODE_NONE:
3402                         break;
3403                 }
3404                 break;
3405         }
3406
3407         ctrl_info->irq_mode = new_mode;
3408 }
3409
3410 #define PQI_LEGACY_INTX_PENDING         0x1
3411
3412 static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info)
3413 {
3414         bool valid_irq;
3415         u32 intx_status;
3416
3417         switch (ctrl_info->irq_mode) {
3418         case IRQ_MODE_MSIX:
3419                 valid_irq = true;
3420                 break;
3421         case IRQ_MODE_INTX:
3422                 intx_status =
3423                         readl(&ctrl_info->pqi_registers->legacy_intx_status);
3424                 if (intx_status & PQI_LEGACY_INTX_PENDING)
3425                         valid_irq = true;
3426                 else
3427                         valid_irq = false;
3428                 break;
3429         case IRQ_MODE_NONE:
3430         default:
3431                 valid_irq = false;
3432                 break;
3433         }
3434
3435         return valid_irq;
3436 }
3437
3438 static irqreturn_t pqi_irq_handler(int irq, void *data)
3439 {
3440         struct pqi_ctrl_info *ctrl_info;
3441         struct pqi_queue_group *queue_group;
3442         unsigned int num_responses_handled;
3443
3444         queue_group = data;
3445         ctrl_info = queue_group->ctrl_info;
3446
3447         if (!pqi_is_valid_irq(ctrl_info))
3448                 return IRQ_NONE;
3449
3450         num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
3451
3452         if (irq == ctrl_info->event_irq)
3453                 num_responses_handled += pqi_process_event_intr(ctrl_info);
3454
3455         if (num_responses_handled)
3456                 atomic_inc(&ctrl_info->num_interrupts);
3457
3458         pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL);
3459         pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL);
3460
3461         return IRQ_HANDLED;
3462 }
3463
3464 static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
3465 {
3466         struct pci_dev *pci_dev = ctrl_info->pci_dev;
3467         int i;
3468         int rc;
3469
3470         ctrl_info->event_irq = pci_irq_vector(pci_dev, 0);
3471
3472         for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
3473                 rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0,
3474                         DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]);
3475                 if (rc) {
3476                         dev_err(&pci_dev->dev,
3477                                 "irq %u init failed with error %d\n",
3478                                 pci_irq_vector(pci_dev, i), rc);
3479                         return rc;
3480                 }
3481                 ctrl_info->num_msix_vectors_initialized++;
3482         }
3483
3484         return 0;
3485 }
3486
3487 static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info)
3488 {
3489         int i;
3490
3491         for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
3492                 free_irq(pci_irq_vector(ctrl_info->pci_dev, i),
3493                         &ctrl_info->queue_groups[i]);
3494
3495         ctrl_info->num_msix_vectors_initialized = 0;
3496 }
3497
3498 static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3499 {
3500         int num_vectors_enabled;
3501
3502         num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
3503                         PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
3504                         PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
3505         if (num_vectors_enabled < 0) {
3506                 dev_err(&ctrl_info->pci_dev->dev,
3507                         "MSI-X init failed with error %d\n",
3508                         num_vectors_enabled);
3509                 return num_vectors_enabled;
3510         }
3511
3512         ctrl_info->num_msix_vectors_enabled = num_vectors_enabled;
3513         ctrl_info->irq_mode = IRQ_MODE_MSIX;
3514         return 0;
3515 }
3516
3517 static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
3518 {
3519         if (ctrl_info->num_msix_vectors_enabled) {
3520                 pci_free_irq_vectors(ctrl_info->pci_dev);
3521                 ctrl_info->num_msix_vectors_enabled = 0;
3522         }
3523 }
3524
3525 static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info)
3526 {
3527         unsigned int i;
3528         size_t alloc_length;
3529         size_t element_array_length_per_iq;
3530         size_t element_array_length_per_oq;
3531         void *element_array;
3532         void __iomem *next_queue_index;
3533         void *aligned_pointer;
3534         unsigned int num_inbound_queues;
3535         unsigned int num_outbound_queues;
3536         unsigned int num_queue_indexes;
3537         struct pqi_queue_group *queue_group;
3538
3539         element_array_length_per_iq =
3540                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH *
3541                 ctrl_info->num_elements_per_iq;
3542         element_array_length_per_oq =
3543                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH *
3544                 ctrl_info->num_elements_per_oq;
3545         num_inbound_queues = ctrl_info->num_queue_groups * 2;
3546         num_outbound_queues = ctrl_info->num_queue_groups;
3547         num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1;
3548
3549         aligned_pointer = NULL;
3550
3551         for (i = 0; i < num_inbound_queues; i++) {
3552                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3553                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3554                 aligned_pointer += element_array_length_per_iq;
3555         }
3556
3557         for (i = 0; i < num_outbound_queues; i++) {
3558                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3559                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3560                 aligned_pointer += element_array_length_per_oq;
3561         }
3562
3563         aligned_pointer = PTR_ALIGN(aligned_pointer,
3564                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3565         aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3566                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3567
3568         for (i = 0; i < num_queue_indexes; i++) {
3569                 aligned_pointer = PTR_ALIGN(aligned_pointer,
3570                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3571                 aligned_pointer += sizeof(pqi_index_t);
3572         }
3573
3574         alloc_length = (size_t)aligned_pointer +
3575                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3576
3577         alloc_length += PQI_EXTRA_SGL_MEMORY;
3578
3579         ctrl_info->queue_memory_base =
3580                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3581                                    &ctrl_info->queue_memory_base_dma_handle,
3582                                    GFP_KERNEL);
3583
3584         if (!ctrl_info->queue_memory_base)
3585                 return -ENOMEM;
3586
3587         ctrl_info->queue_memory_length = alloc_length;
3588
3589         element_array = PTR_ALIGN(ctrl_info->queue_memory_base,
3590                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3591
3592         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3593                 queue_group = &ctrl_info->queue_groups[i];
3594                 queue_group->iq_element_array[RAID_PATH] = element_array;
3595                 queue_group->iq_element_array_bus_addr[RAID_PATH] =
3596                         ctrl_info->queue_memory_base_dma_handle +
3597                                 (element_array - ctrl_info->queue_memory_base);
3598                 element_array += element_array_length_per_iq;
3599                 element_array = PTR_ALIGN(element_array,
3600                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3601                 queue_group->iq_element_array[AIO_PATH] = element_array;
3602                 queue_group->iq_element_array_bus_addr[AIO_PATH] =
3603                         ctrl_info->queue_memory_base_dma_handle +
3604                         (element_array - ctrl_info->queue_memory_base);
3605                 element_array += element_array_length_per_iq;
3606                 element_array = PTR_ALIGN(element_array,
3607                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3608         }
3609
3610         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3611                 queue_group = &ctrl_info->queue_groups[i];
3612                 queue_group->oq_element_array = element_array;
3613                 queue_group->oq_element_array_bus_addr =
3614                         ctrl_info->queue_memory_base_dma_handle +
3615                         (element_array - ctrl_info->queue_memory_base);
3616                 element_array += element_array_length_per_oq;
3617                 element_array = PTR_ALIGN(element_array,
3618                         PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3619         }
3620
3621         ctrl_info->event_queue.oq_element_array = element_array;
3622         ctrl_info->event_queue.oq_element_array_bus_addr =
3623                 ctrl_info->queue_memory_base_dma_handle +
3624                 (element_array - ctrl_info->queue_memory_base);
3625         element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS *
3626                 PQI_EVENT_OQ_ELEMENT_LENGTH;
3627
3628         next_queue_index = (void __iomem *)PTR_ALIGN(element_array,
3629                 PQI_OPERATIONAL_INDEX_ALIGNMENT);
3630
3631         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3632                 queue_group = &ctrl_info->queue_groups[i];
3633                 queue_group->iq_ci[RAID_PATH] = next_queue_index;
3634                 queue_group->iq_ci_bus_addr[RAID_PATH] =
3635                         ctrl_info->queue_memory_base_dma_handle +
3636                         (next_queue_index -
3637                         (void __iomem *)ctrl_info->queue_memory_base);
3638                 next_queue_index += sizeof(pqi_index_t);
3639                 next_queue_index = PTR_ALIGN(next_queue_index,
3640                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3641                 queue_group->iq_ci[AIO_PATH] = next_queue_index;
3642                 queue_group->iq_ci_bus_addr[AIO_PATH] =
3643                         ctrl_info->queue_memory_base_dma_handle +
3644                         (next_queue_index -
3645                         (void __iomem *)ctrl_info->queue_memory_base);
3646                 next_queue_index += sizeof(pqi_index_t);
3647                 next_queue_index = PTR_ALIGN(next_queue_index,
3648                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3649                 queue_group->oq_pi = next_queue_index;
3650                 queue_group->oq_pi_bus_addr =
3651                         ctrl_info->queue_memory_base_dma_handle +
3652                         (next_queue_index -
3653                         (void __iomem *)ctrl_info->queue_memory_base);
3654                 next_queue_index += sizeof(pqi_index_t);
3655                 next_queue_index = PTR_ALIGN(next_queue_index,
3656                         PQI_OPERATIONAL_INDEX_ALIGNMENT);
3657         }
3658
3659         ctrl_info->event_queue.oq_pi = next_queue_index;
3660         ctrl_info->event_queue.oq_pi_bus_addr =
3661                 ctrl_info->queue_memory_base_dma_handle +
3662                 (next_queue_index -
3663                 (void __iomem *)ctrl_info->queue_memory_base);
3664
3665         return 0;
3666 }
3667
3668 static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info)
3669 {
3670         unsigned int i;
3671         u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3672         u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID;
3673
3674         /*
3675          * Initialize the backpointers to the controller structure in
3676          * each operational queue group structure.
3677          */
3678         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3679                 ctrl_info->queue_groups[i].ctrl_info = ctrl_info;
3680
3681         /*
3682          * Assign IDs to all operational queues.  Note that the IDs
3683          * assigned to operational IQs are independent of the IDs
3684          * assigned to operational OQs.
3685          */
3686         ctrl_info->event_queue.oq_id = next_oq_id++;
3687         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3688                 ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++;
3689                 ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++;
3690                 ctrl_info->queue_groups[i].oq_id = next_oq_id++;
3691         }
3692
3693         /*
3694          * Assign MSI-X table entry indexes to all queues.  Note that the
3695          * interrupt for the event queue is shared with the first queue group.
3696          */
3697         ctrl_info->event_queue.int_msg_num = 0;
3698         for (i = 0; i < ctrl_info->num_queue_groups; i++)
3699                 ctrl_info->queue_groups[i].int_msg_num = i;
3700
3701         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
3702                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]);
3703                 spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]);
3704                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]);
3705                 INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]);
3706         }
3707 }
3708
3709 static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info)
3710 {
3711         size_t alloc_length;
3712         struct pqi_admin_queues_aligned *admin_queues_aligned;
3713         struct pqi_admin_queues *admin_queues;
3714
3715         alloc_length = sizeof(struct pqi_admin_queues_aligned) +
3716                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT;
3717
3718         ctrl_info->admin_queue_memory_base =
3719                 dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length,
3720                                    &ctrl_info->admin_queue_memory_base_dma_handle,
3721                                    GFP_KERNEL);
3722
3723         if (!ctrl_info->admin_queue_memory_base)
3724                 return -ENOMEM;
3725
3726         ctrl_info->admin_queue_memory_length = alloc_length;
3727
3728         admin_queues = &ctrl_info->admin_queues;
3729         admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base,
3730                 PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT);
3731         admin_queues->iq_element_array =
3732                 &admin_queues_aligned->iq_element_array;
3733         admin_queues->oq_element_array =
3734                 &admin_queues_aligned->oq_element_array;
3735         admin_queues->iq_ci = &admin_queues_aligned->iq_ci;
3736         admin_queues->oq_pi =
3737                 (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi;
3738
3739         admin_queues->iq_element_array_bus_addr =
3740                 ctrl_info->admin_queue_memory_base_dma_handle +
3741                 (admin_queues->iq_element_array -
3742                 ctrl_info->admin_queue_memory_base);
3743         admin_queues->oq_element_array_bus_addr =
3744                 ctrl_info->admin_queue_memory_base_dma_handle +
3745                 (admin_queues->oq_element_array -
3746                 ctrl_info->admin_queue_memory_base);
3747         admin_queues->iq_ci_bus_addr =
3748                 ctrl_info->admin_queue_memory_base_dma_handle +
3749                 ((void *)admin_queues->iq_ci -
3750                 ctrl_info->admin_queue_memory_base);
3751         admin_queues->oq_pi_bus_addr =
3752                 ctrl_info->admin_queue_memory_base_dma_handle +
3753                 ((void __iomem *)admin_queues->oq_pi -
3754                 (void __iomem *)ctrl_info->admin_queue_memory_base);
3755
3756         return 0;
3757 }
3758
3759 #define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES          PQI_HZ
3760 #define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS      1
3761
3762 static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info)
3763 {
3764         struct pqi_device_registers __iomem *pqi_registers;
3765         struct pqi_admin_queues *admin_queues;
3766         unsigned long timeout;
3767         u8 status;
3768         u32 reg;
3769
3770         pqi_registers = ctrl_info->pqi_registers;
3771         admin_queues = &ctrl_info->admin_queues;
3772
3773         writeq((u64)admin_queues->iq_element_array_bus_addr,
3774                 &pqi_registers->admin_iq_element_array_addr);
3775         writeq((u64)admin_queues->oq_element_array_bus_addr,
3776                 &pqi_registers->admin_oq_element_array_addr);
3777         writeq((u64)admin_queues->iq_ci_bus_addr,
3778                 &pqi_registers->admin_iq_ci_addr);
3779         writeq((u64)admin_queues->oq_pi_bus_addr,
3780                 &pqi_registers->admin_oq_pi_addr);
3781
3782         reg = PQI_ADMIN_IQ_NUM_ELEMENTS |
3783                 (PQI_ADMIN_OQ_NUM_ELEMENTS) << 8 |
3784                 (admin_queues->int_msg_num << 16);
3785         writel(reg, &pqi_registers->admin_iq_num_elements);
3786         writel(PQI_CREATE_ADMIN_QUEUE_PAIR,
3787                 &pqi_registers->function_and_status_code);
3788
3789         timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies;
3790         while (1) {
3791                 status = readb(&pqi_registers->function_and_status_code);
3792                 if (status == PQI_STATUS_IDLE)
3793                         break;
3794                 if (time_after(jiffies, timeout))
3795                         return -ETIMEDOUT;
3796                 msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS);
3797         }
3798
3799         /*
3800          * The offset registers are not initialized to the correct
3801          * offsets until *after* the create admin queue pair command
3802          * completes successfully.
3803          */
3804         admin_queues->iq_pi = ctrl_info->iomem_base +
3805                 PQI_DEVICE_REGISTERS_OFFSET +
3806                 readq(&pqi_registers->admin_iq_pi_offset);
3807         admin_queues->oq_ci = ctrl_info->iomem_base +
3808                 PQI_DEVICE_REGISTERS_OFFSET +
3809                 readq(&pqi_registers->admin_oq_ci_offset);
3810
3811         return 0;
3812 }
3813
3814 static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info,
3815         struct pqi_general_admin_request *request)
3816 {
3817         struct pqi_admin_queues *admin_queues;
3818         void *next_element;
3819         pqi_index_t iq_pi;
3820
3821         admin_queues = &ctrl_info->admin_queues;
3822         iq_pi = admin_queues->iq_pi_copy;
3823
3824         next_element = admin_queues->iq_element_array +
3825                 (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH);
3826
3827         memcpy(next_element, request, sizeof(*request));
3828
3829         iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS;
3830         admin_queues->iq_pi_copy = iq_pi;
3831
3832         /*
3833          * This write notifies the controller that an IU is available to be
3834          * processed.
3835          */
3836         writel(iq_pi, admin_queues->iq_pi);
3837 }
3838
3839 #define PQI_ADMIN_REQUEST_TIMEOUT_SECS  60
3840
3841 static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info,
3842         struct pqi_general_admin_response *response)
3843 {
3844         struct pqi_admin_queues *admin_queues;
3845         pqi_index_t oq_pi;
3846         pqi_index_t oq_ci;
3847         unsigned long timeout;
3848
3849         admin_queues = &ctrl_info->admin_queues;
3850         oq_ci = admin_queues->oq_ci_copy;
3851
3852         timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies;
3853
3854         while (1) {
3855                 oq_pi = readl(admin_queues->oq_pi);
3856                 if (oq_pi != oq_ci)
3857                         break;
3858                 if (time_after(jiffies, timeout)) {
3859                         dev_err(&ctrl_info->pci_dev->dev,
3860                                 "timed out waiting for admin response\n");
3861                         return -ETIMEDOUT;
3862                 }
3863                 if (!sis_is_firmware_running(ctrl_info))
3864                         return -ENXIO;
3865                 usleep_range(1000, 2000);
3866         }
3867
3868         memcpy(response, admin_queues->oq_element_array +
3869                 (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response));
3870
3871         oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS;
3872         admin_queues->oq_ci_copy = oq_ci;
3873         writel(oq_ci, admin_queues->oq_ci);
3874
3875         return 0;
3876 }
3877
3878 static void pqi_start_io(struct pqi_ctrl_info *ctrl_info,
3879         struct pqi_queue_group *queue_group, enum pqi_io_path path,
3880         struct pqi_io_request *io_request)
3881 {
3882         struct pqi_io_request *next;
3883         void *next_element;
3884         pqi_index_t iq_pi;
3885         pqi_index_t iq_ci;
3886         size_t iu_length;
3887         unsigned long flags;
3888         unsigned int num_elements_needed;
3889         unsigned int num_elements_to_end_of_queue;
3890         size_t copy_count;
3891         struct pqi_iu_header *request;
3892
3893         spin_lock_irqsave(&queue_group->submit_lock[path], flags);
3894
3895         if (io_request) {
3896                 io_request->queue_group = queue_group;
3897                 list_add_tail(&io_request->request_list_entry,
3898                         &queue_group->request_list[path]);
3899         }
3900
3901         iq_pi = queue_group->iq_pi_copy[path];
3902
3903         list_for_each_entry_safe(io_request, next,
3904                 &queue_group->request_list[path], request_list_entry) {
3905
3906                 request = io_request->iu;
3907
3908                 iu_length = get_unaligned_le16(&request->iu_length) +
3909                         PQI_REQUEST_HEADER_LENGTH;
3910                 num_elements_needed =
3911                         DIV_ROUND_UP(iu_length,
3912                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3913
3914                 iq_ci = readl(queue_group->iq_ci[path]);
3915
3916                 if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci,
3917                         ctrl_info->num_elements_per_iq))
3918                         break;
3919
3920                 put_unaligned_le16(queue_group->oq_id,
3921                         &request->response_queue_id);
3922
3923                 next_element = queue_group->iq_element_array[path] +
3924                         (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
3925
3926                 num_elements_to_end_of_queue =
3927                         ctrl_info->num_elements_per_iq - iq_pi;
3928
3929                 if (num_elements_needed <= num_elements_to_end_of_queue) {
3930                         memcpy(next_element, request, iu_length);
3931                 } else {
3932                         copy_count = num_elements_to_end_of_queue *
3933                                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
3934                         memcpy(next_element, request, copy_count);
3935                         memcpy(queue_group->iq_element_array[path],
3936                                 (u8 *)request + copy_count,
3937                                 iu_length - copy_count);
3938                 }
3939
3940                 iq_pi = (iq_pi + num_elements_needed) %
3941                         ctrl_info->num_elements_per_iq;
3942
3943                 list_del(&io_request->request_list_entry);
3944         }
3945
3946         if (iq_pi != queue_group->iq_pi_copy[path]) {
3947                 queue_group->iq_pi_copy[path] = iq_pi;
3948                 /*
3949                  * This write notifies the controller that one or more IUs are
3950                  * available to be processed.
3951                  */
3952                 writel(iq_pi, queue_group->iq_pi[path]);
3953         }
3954
3955         spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
3956 }
3957
3958 #define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS         10
3959
3960 static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info,
3961         struct completion *wait)
3962 {
3963         int rc;
3964
3965         while (1) {
3966                 if (wait_for_completion_io_timeout(wait,
3967                         PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) {
3968                         rc = 0;
3969                         break;
3970                 }
3971
3972                 pqi_check_ctrl_health(ctrl_info);
3973                 if (pqi_ctrl_offline(ctrl_info)) {
3974                         rc = -ENXIO;
3975                         break;
3976                 }
3977         }
3978
3979         return rc;
3980 }
3981
3982 static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
3983         void *context)
3984 {
3985         struct completion *waiting = context;
3986
3987         complete(waiting);
3988 }
3989
3990 static int pqi_process_raid_io_error_synchronous(struct pqi_raid_error_info
3991                                                 *error_info)
3992 {
3993         int rc = -EIO;
3994
3995         switch (error_info->data_out_result) {
3996         case PQI_DATA_IN_OUT_GOOD:
3997                 if (error_info->status == SAM_STAT_GOOD)
3998                         rc = 0;
3999                 break;
4000         case PQI_DATA_IN_OUT_UNDERFLOW:
4001                 if (error_info->status == SAM_STAT_GOOD ||
4002                         error_info->status == SAM_STAT_CHECK_CONDITION)
4003                         rc = 0;
4004                 break;
4005         case PQI_DATA_IN_OUT_ABORTED:
4006                 rc = PQI_CMD_STATUS_ABORTED;
4007                 break;
4008         }
4009
4010         return rc;
4011 }
4012
4013 static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info,
4014         struct pqi_iu_header *request, unsigned int flags,
4015         struct pqi_raid_error_info *error_info, unsigned long timeout_msecs)
4016 {
4017         int rc = 0;
4018         struct pqi_io_request *io_request;
4019         unsigned long start_jiffies;
4020         unsigned long msecs_blocked;
4021         size_t iu_length;
4022         DECLARE_COMPLETION_ONSTACK(wait);
4023
4024         /*
4025          * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value
4026          * are mutually exclusive.
4027          */
4028
4029         if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) {
4030                 if (down_interruptible(&ctrl_info->sync_request_sem))
4031                         return -ERESTARTSYS;
4032         } else {
4033                 if (timeout_msecs == NO_TIMEOUT) {
4034                         down(&ctrl_info->sync_request_sem);
4035                 } else {
4036                         start_jiffies = jiffies;
4037                         if (down_timeout(&ctrl_info->sync_request_sem,
4038                                 msecs_to_jiffies(timeout_msecs)))
4039                                 return -ETIMEDOUT;
4040                         msecs_blocked =
4041                                 jiffies_to_msecs(jiffies - start_jiffies);
4042                         if (msecs_blocked >= timeout_msecs) {
4043                                 rc = -ETIMEDOUT;
4044                                 goto out;
4045                         }
4046                         timeout_msecs -= msecs_blocked;
4047                 }
4048         }
4049
4050         pqi_ctrl_busy(ctrl_info);
4051         timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs);
4052         if (timeout_msecs == 0) {
4053                 pqi_ctrl_unbusy(ctrl_info);
4054                 rc = -ETIMEDOUT;
4055                 goto out;
4056         }
4057
4058         if (pqi_ctrl_offline(ctrl_info)) {
4059                 pqi_ctrl_unbusy(ctrl_info);
4060                 rc = -ENXIO;
4061                 goto out;
4062         }
4063
4064         atomic_inc(&ctrl_info->sync_cmds_outstanding);
4065
4066         io_request = pqi_alloc_io_request(ctrl_info);
4067
4068         put_unaligned_le16(io_request->index,
4069                 &(((struct pqi_raid_path_request *)request)->request_id));
4070
4071         if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO)
4072                 ((struct pqi_raid_path_request *)request)->error_index =
4073                         ((struct pqi_raid_path_request *)request)->request_id;
4074
4075         iu_length = get_unaligned_le16(&request->iu_length) +
4076                 PQI_REQUEST_HEADER_LENGTH;
4077         memcpy(io_request->iu, request, iu_length);
4078
4079         io_request->io_complete_callback = pqi_raid_synchronous_complete;
4080         io_request->context = &wait;
4081
4082         pqi_start_io(ctrl_info,
4083                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
4084                 io_request);
4085
4086         pqi_ctrl_unbusy(ctrl_info);
4087
4088         if (timeout_msecs == NO_TIMEOUT) {
4089                 pqi_wait_for_completion_io(ctrl_info, &wait);
4090         } else {
4091                 if (!wait_for_completion_io_timeout(&wait,
4092                         msecs_to_jiffies(timeout_msecs))) {
4093                         dev_warn(&ctrl_info->pci_dev->dev,
4094                                 "command timed out\n");
4095                         rc = -ETIMEDOUT;
4096                 }
4097         }
4098
4099         if (error_info) {
4100                 if (io_request->error_info)
4101                         memcpy(error_info, io_request->error_info,
4102                                 sizeof(*error_info));
4103                 else
4104                         memset(error_info, 0, sizeof(*error_info));
4105         } else if (rc == 0 && io_request->error_info) {
4106                 rc = pqi_process_raid_io_error_synchronous(
4107                         io_request->error_info);
4108         }
4109
4110         pqi_free_io_request(io_request);
4111
4112         atomic_dec(&ctrl_info->sync_cmds_outstanding);
4113 out:
4114         up(&ctrl_info->sync_request_sem);
4115
4116         return rc;
4117 }
4118
4119 static int pqi_validate_admin_response(
4120         struct pqi_general_admin_response *response, u8 expected_function_code)
4121 {
4122         if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN)
4123                 return -EINVAL;
4124
4125         if (get_unaligned_le16(&response->header.iu_length) !=
4126                 PQI_GENERAL_ADMIN_IU_LENGTH)
4127                 return -EINVAL;
4128
4129         if (response->function_code != expected_function_code)
4130                 return -EINVAL;
4131
4132         if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS)
4133                 return -EINVAL;
4134
4135         return 0;
4136 }
4137
4138 static int pqi_submit_admin_request_synchronous(
4139         struct pqi_ctrl_info *ctrl_info,
4140         struct pqi_general_admin_request *request,
4141         struct pqi_general_admin_response *response)
4142 {
4143         int rc;
4144
4145         pqi_submit_admin_request(ctrl_info, request);
4146
4147         rc = pqi_poll_for_admin_response(ctrl_info, response);
4148
4149         if (rc == 0)
4150                 rc = pqi_validate_admin_response(response,
4151                         request->function_code);
4152
4153         return rc;
4154 }
4155
4156 static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info)
4157 {
4158         int rc;
4159         struct pqi_general_admin_request request;
4160         struct pqi_general_admin_response response;
4161         struct pqi_device_capability *capability;
4162         struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor;
4163
4164         capability = kmalloc(sizeof(*capability), GFP_KERNEL);
4165         if (!capability)
4166                 return -ENOMEM;
4167
4168         memset(&request, 0, sizeof(request));
4169
4170         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4171         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4172                 &request.header.iu_length);
4173         request.function_code =
4174                 PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY;
4175         put_unaligned_le32(sizeof(*capability),
4176                 &request.data.report_device_capability.buffer_length);
4177
4178         rc = pqi_map_single(ctrl_info->pci_dev,
4179                 &request.data.report_device_capability.sg_descriptor,
4180                 capability, sizeof(*capability),
4181                 DMA_FROM_DEVICE);
4182         if (rc)
4183                 goto out;
4184
4185         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4186                 &response);
4187
4188         pqi_pci_unmap(ctrl_info->pci_dev,
4189                 &request.data.report_device_capability.sg_descriptor, 1,
4190                 DMA_FROM_DEVICE);
4191
4192         if (rc)
4193                 goto out;
4194
4195         if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) {
4196                 rc = -EIO;
4197                 goto out;
4198         }
4199
4200         ctrl_info->max_inbound_queues =
4201                 get_unaligned_le16(&capability->max_inbound_queues);
4202         ctrl_info->max_elements_per_iq =
4203                 get_unaligned_le16(&capability->max_elements_per_iq);
4204         ctrl_info->max_iq_element_length =
4205                 get_unaligned_le16(&capability->max_iq_element_length)
4206                 * 16;
4207         ctrl_info->max_outbound_queues =
4208                 get_unaligned_le16(&capability->max_outbound_queues);
4209         ctrl_info->max_elements_per_oq =
4210                 get_unaligned_le16(&capability->max_elements_per_oq);
4211         ctrl_info->max_oq_element_length =
4212                 get_unaligned_le16(&capability->max_oq_element_length)
4213                 * 16;
4214
4215         sop_iu_layer_descriptor =
4216                 &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP];
4217
4218         ctrl_info->max_inbound_iu_length_per_firmware =
4219                 get_unaligned_le16(
4220                         &sop_iu_layer_descriptor->max_inbound_iu_length);
4221         ctrl_info->inbound_spanning_supported =
4222                 sop_iu_layer_descriptor->inbound_spanning_supported;
4223         ctrl_info->outbound_spanning_supported =
4224                 sop_iu_layer_descriptor->outbound_spanning_supported;
4225
4226 out:
4227         kfree(capability);
4228
4229         return rc;
4230 }
4231
4232 static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info)
4233 {
4234         if (ctrl_info->max_iq_element_length <
4235                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4236                 dev_err(&ctrl_info->pci_dev->dev,
4237                         "max. inbound queue element length of %d is less than the required length of %d\n",
4238                         ctrl_info->max_iq_element_length,
4239                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4240                 return -EINVAL;
4241         }
4242
4243         if (ctrl_info->max_oq_element_length <
4244                 PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) {
4245                 dev_err(&ctrl_info->pci_dev->dev,
4246                         "max. outbound queue element length of %d is less than the required length of %d\n",
4247                         ctrl_info->max_oq_element_length,
4248                         PQI_OPERATIONAL_OQ_ELEMENT_LENGTH);
4249                 return -EINVAL;
4250         }
4251
4252         if (ctrl_info->max_inbound_iu_length_per_firmware <
4253                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) {
4254                 dev_err(&ctrl_info->pci_dev->dev,
4255                         "max. inbound IU length of %u is less than the min. required length of %d\n",
4256                         ctrl_info->max_inbound_iu_length_per_firmware,
4257                         PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4258                 return -EINVAL;
4259         }
4260
4261         if (!ctrl_info->inbound_spanning_supported) {
4262                 dev_err(&ctrl_info->pci_dev->dev,
4263                         "the controller does not support inbound spanning\n");
4264                 return -EINVAL;
4265         }
4266
4267         if (ctrl_info->outbound_spanning_supported) {
4268                 dev_err(&ctrl_info->pci_dev->dev,
4269                         "the controller supports outbound spanning but this driver does not\n");
4270                 return -EINVAL;
4271         }
4272
4273         return 0;
4274 }
4275
4276 static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info)
4277 {
4278         int rc;
4279         struct pqi_event_queue *event_queue;
4280         struct pqi_general_admin_request request;
4281         struct pqi_general_admin_response response;
4282
4283         event_queue = &ctrl_info->event_queue;
4284
4285         /*
4286          * Create OQ (Outbound Queue - device to host queue) to dedicate
4287          * to events.
4288          */
4289         memset(&request, 0, sizeof(request));
4290         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4291         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4292                 &request.header.iu_length);
4293         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4294         put_unaligned_le16(event_queue->oq_id,
4295                 &request.data.create_operational_oq.queue_id);
4296         put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr,
4297                 &request.data.create_operational_oq.element_array_addr);
4298         put_unaligned_le64((u64)event_queue->oq_pi_bus_addr,
4299                 &request.data.create_operational_oq.pi_addr);
4300         put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS,
4301                 &request.data.create_operational_oq.num_elements);
4302         put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16,
4303                 &request.data.create_operational_oq.element_length);
4304         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4305         put_unaligned_le16(event_queue->int_msg_num,
4306                 &request.data.create_operational_oq.int_msg_num);
4307
4308         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4309                 &response);
4310         if (rc)
4311                 return rc;
4312
4313         event_queue->oq_ci = ctrl_info->iomem_base +
4314                 PQI_DEVICE_REGISTERS_OFFSET +
4315                 get_unaligned_le64(
4316                         &response.data.create_operational_oq.oq_ci_offset);
4317
4318         return 0;
4319 }
4320
4321 static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info,
4322         unsigned int group_number)
4323 {
4324         int rc;
4325         struct pqi_queue_group *queue_group;
4326         struct pqi_general_admin_request request;
4327         struct pqi_general_admin_response response;
4328
4329         queue_group = &ctrl_info->queue_groups[group_number];
4330
4331         /*
4332          * Create IQ (Inbound Queue - host to device queue) for
4333          * RAID path.
4334          */
4335         memset(&request, 0, sizeof(request));
4336         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4337         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4338                 &request.header.iu_length);
4339         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4340         put_unaligned_le16(queue_group->iq_id[RAID_PATH],
4341                 &request.data.create_operational_iq.queue_id);
4342         put_unaligned_le64(
4343                 (u64)queue_group->iq_element_array_bus_addr[RAID_PATH],
4344                 &request.data.create_operational_iq.element_array_addr);
4345         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH],
4346                 &request.data.create_operational_iq.ci_addr);
4347         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4348                 &request.data.create_operational_iq.num_elements);
4349         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4350                 &request.data.create_operational_iq.element_length);
4351         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4352
4353         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4354                 &response);
4355         if (rc) {
4356                 dev_err(&ctrl_info->pci_dev->dev,
4357                         "error creating inbound RAID queue\n");
4358                 return rc;
4359         }
4360
4361         queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base +
4362                 PQI_DEVICE_REGISTERS_OFFSET +
4363                 get_unaligned_le64(
4364                         &response.data.create_operational_iq.iq_pi_offset);
4365
4366         /*
4367          * Create IQ (Inbound Queue - host to device queue) for
4368          * Advanced I/O (AIO) path.
4369          */
4370         memset(&request, 0, sizeof(request));
4371         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4372         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4373                 &request.header.iu_length);
4374         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ;
4375         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4376                 &request.data.create_operational_iq.queue_id);
4377         put_unaligned_le64((u64)queue_group->
4378                 iq_element_array_bus_addr[AIO_PATH],
4379                 &request.data.create_operational_iq.element_array_addr);
4380         put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH],
4381                 &request.data.create_operational_iq.ci_addr);
4382         put_unaligned_le16(ctrl_info->num_elements_per_iq,
4383                 &request.data.create_operational_iq.num_elements);
4384         put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16,
4385                 &request.data.create_operational_iq.element_length);
4386         request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP;
4387
4388         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4389                 &response);
4390         if (rc) {
4391                 dev_err(&ctrl_info->pci_dev->dev,
4392                         "error creating inbound AIO queue\n");
4393                 return rc;
4394         }
4395
4396         queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base +
4397                 PQI_DEVICE_REGISTERS_OFFSET +
4398                 get_unaligned_le64(
4399                         &response.data.create_operational_iq.iq_pi_offset);
4400
4401         /*
4402          * Designate the 2nd IQ as the AIO path.  By default, all IQs are
4403          * assumed to be for RAID path I/O unless we change the queue's
4404          * property.
4405          */
4406         memset(&request, 0, sizeof(request));
4407         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4408         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4409                 &request.header.iu_length);
4410         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY;
4411         put_unaligned_le16(queue_group->iq_id[AIO_PATH],
4412                 &request.data.change_operational_iq_properties.queue_id);
4413         put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE,
4414                 &request.data.change_operational_iq_properties.vendor_specific);
4415
4416         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4417                 &response);
4418         if (rc) {
4419                 dev_err(&ctrl_info->pci_dev->dev,
4420                         "error changing queue property\n");
4421                 return rc;
4422         }
4423
4424         /*
4425          * Create OQ (Outbound Queue - device to host queue).
4426          */
4427         memset(&request, 0, sizeof(request));
4428         request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN;
4429         put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH,
4430                 &request.header.iu_length);
4431         request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ;
4432         put_unaligned_le16(queue_group->oq_id,
4433                 &request.data.create_operational_oq.queue_id);
4434         put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr,
4435                 &request.data.create_operational_oq.element_array_addr);
4436         put_unaligned_le64((u64)queue_group->oq_pi_bus_addr,
4437                 &request.data.create_operational_oq.pi_addr);
4438         put_unaligned_le16(ctrl_info->num_elements_per_oq,
4439                 &request.data.create_operational_oq.num_elements);
4440         put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16,
4441                 &request.data.create_operational_oq.element_length);
4442         request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP;
4443         put_unaligned_le16(queue_group->int_msg_num,
4444                 &request.data.create_operational_oq.int_msg_num);
4445
4446         rc = pqi_submit_admin_request_synchronous(ctrl_info, &request,
4447                 &response);
4448         if (rc) {
4449                 dev_err(&ctrl_info->pci_dev->dev,
4450                         "error creating outbound queue\n");
4451                 return rc;
4452         }
4453
4454         queue_group->oq_ci = ctrl_info->iomem_base +
4455                 PQI_DEVICE_REGISTERS_OFFSET +
4456                 get_unaligned_le64(
4457                         &response.data.create_operational_oq.oq_ci_offset);
4458
4459         return 0;
4460 }
4461
4462 static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info)
4463 {
4464         int rc;
4465         unsigned int i;
4466
4467         rc = pqi_create_event_queue(ctrl_info);
4468         if (rc) {
4469                 dev_err(&ctrl_info->pci_dev->dev,
4470                         "error creating event queue\n");
4471                 return rc;
4472         }
4473
4474         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
4475                 rc = pqi_create_queue_group(ctrl_info, i);
4476                 if (rc) {
4477                         dev_err(&ctrl_info->pci_dev->dev,
4478                                 "error creating queue group number %u/%u\n",
4479                                 i, ctrl_info->num_queue_groups);
4480                         return rc;
4481                 }
4482         }
4483
4484         return 0;
4485 }
4486
4487 #define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH   \
4488         (offsetof(struct pqi_event_config, descriptors) + \
4489         (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor)))
4490
4491 static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info,
4492         bool enable_events)
4493 {
4494         int rc;
4495         unsigned int i;
4496         struct pqi_event_config *event_config;
4497         struct pqi_event_descriptor *event_descriptor;
4498         struct pqi_general_management_request request;
4499
4500         event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4501                 GFP_KERNEL);
4502         if (!event_config)
4503                 return -ENOMEM;
4504
4505         memset(&request, 0, sizeof(request));
4506
4507         request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG;
4508         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4509                 data.report_event_configuration.sg_descriptors[1]) -
4510                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4511         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4512                 &request.data.report_event_configuration.buffer_length);
4513
4514         rc = pqi_map_single(ctrl_info->pci_dev,
4515                 request.data.report_event_configuration.sg_descriptors,
4516                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4517                 DMA_FROM_DEVICE);
4518         if (rc)
4519                 goto out;
4520
4521         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
4522                 0, NULL, NO_TIMEOUT);
4523
4524         pqi_pci_unmap(ctrl_info->pci_dev,
4525                 request.data.report_event_configuration.sg_descriptors, 1,
4526                 DMA_FROM_DEVICE);
4527
4528         if (rc)
4529                 goto out;
4530
4531         for (i = 0; i < event_config->num_event_descriptors; i++) {
4532                 event_descriptor = &event_config->descriptors[i];
4533                 if (enable_events &&
4534                         pqi_is_supported_event(event_descriptor->event_type))
4535                         put_unaligned_le16(ctrl_info->event_queue.oq_id,
4536                                         &event_descriptor->oq_id);
4537                 else
4538                         put_unaligned_le16(0, &event_descriptor->oq_id);
4539         }
4540
4541         memset(&request, 0, sizeof(request));
4542
4543         request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG;
4544         put_unaligned_le16(offsetof(struct pqi_general_management_request,
4545                 data.report_event_configuration.sg_descriptors[1]) -
4546                 PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length);
4547         put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4548                 &request.data.report_event_configuration.buffer_length);
4549
4550         rc = pqi_map_single(ctrl_info->pci_dev,
4551                 request.data.report_event_configuration.sg_descriptors,
4552                 event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH,
4553                 DMA_TO_DEVICE);
4554         if (rc)
4555                 goto out;
4556
4557         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0,
4558                 NULL, NO_TIMEOUT);
4559
4560         pqi_pci_unmap(ctrl_info->pci_dev,
4561                 request.data.report_event_configuration.sg_descriptors, 1,
4562                 DMA_TO_DEVICE);
4563
4564 out:
4565         kfree(event_config);
4566
4567         return rc;
4568 }
4569
4570 static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info)
4571 {
4572         return pqi_configure_events(ctrl_info, true);
4573 }
4574
4575 static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info)
4576 {
4577         return pqi_configure_events(ctrl_info, false);
4578 }
4579
4580 static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info)
4581 {
4582         unsigned int i;
4583         struct device *dev;
4584         size_t sg_chain_buffer_length;
4585         struct pqi_io_request *io_request;
4586
4587         if (!ctrl_info->io_request_pool)
4588                 return;
4589
4590         dev = &ctrl_info->pci_dev->dev;
4591         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4592         io_request = ctrl_info->io_request_pool;
4593
4594         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4595                 kfree(io_request->iu);
4596                 if (!io_request->sg_chain_buffer)
4597                         break;
4598                 dma_free_coherent(dev, sg_chain_buffer_length,
4599                         io_request->sg_chain_buffer,
4600                         io_request->sg_chain_buffer_dma_handle);
4601                 io_request++;
4602         }
4603
4604         kfree(ctrl_info->io_request_pool);
4605         ctrl_info->io_request_pool = NULL;
4606 }
4607
4608 static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info)
4609 {
4610         ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev,
4611                                                      ctrl_info->error_buffer_length,
4612                                                      &ctrl_info->error_buffer_dma_handle,
4613                                                      GFP_KERNEL);
4614
4615         if (!ctrl_info->error_buffer)
4616                 return -ENOMEM;
4617
4618         return 0;
4619 }
4620
4621 static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info)
4622 {
4623         unsigned int i;
4624         void *sg_chain_buffer;
4625         size_t sg_chain_buffer_length;
4626         dma_addr_t sg_chain_buffer_dma_handle;
4627         struct device *dev;
4628         struct pqi_io_request *io_request;
4629
4630         ctrl_info->io_request_pool =
4631                 kcalloc(ctrl_info->max_io_slots,
4632                         sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL);
4633
4634         if (!ctrl_info->io_request_pool) {
4635                 dev_err(&ctrl_info->pci_dev->dev,
4636                         "failed to allocate I/O request pool\n");
4637                 goto error;
4638         }
4639
4640         dev = &ctrl_info->pci_dev->dev;
4641         sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length;
4642         io_request = ctrl_info->io_request_pool;
4643
4644         for (i = 0; i < ctrl_info->max_io_slots; i++) {
4645                 io_request->iu =
4646                         kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL);
4647
4648                 if (!io_request->iu) {
4649                         dev_err(&ctrl_info->pci_dev->dev,
4650                                 "failed to allocate IU buffers\n");
4651                         goto error;
4652                 }
4653
4654                 sg_chain_buffer = dma_alloc_coherent(dev,
4655                         sg_chain_buffer_length, &sg_chain_buffer_dma_handle,
4656                         GFP_KERNEL);
4657
4658                 if (!sg_chain_buffer) {
4659                         dev_err(&ctrl_info->pci_dev->dev,
4660                                 "failed to allocate PQI scatter-gather chain buffers\n");
4661                         goto error;
4662                 }
4663
4664                 io_request->index = i;
4665                 io_request->sg_chain_buffer = sg_chain_buffer;
4666                 io_request->sg_chain_buffer_dma_handle =
4667                         sg_chain_buffer_dma_handle;
4668                 io_request++;
4669         }
4670
4671         return 0;
4672
4673 error:
4674         pqi_free_all_io_requests(ctrl_info);
4675
4676         return -ENOMEM;
4677 }
4678
4679 /*
4680  * Calculate required resources that are sized based on max. outstanding
4681  * requests and max. transfer size.
4682  */
4683
4684 static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info)
4685 {
4686         u32 max_transfer_size;
4687         u32 max_sg_entries;
4688
4689         ctrl_info->scsi_ml_can_queue =
4690                 ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS;
4691         ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests;
4692
4693         ctrl_info->error_buffer_length =
4694                 ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH;
4695
4696         if (reset_devices)
4697                 max_transfer_size = min(ctrl_info->max_transfer_size,
4698                         PQI_MAX_TRANSFER_SIZE_KDUMP);
4699         else
4700                 max_transfer_size = min(ctrl_info->max_transfer_size,
4701                         PQI_MAX_TRANSFER_SIZE);
4702
4703         max_sg_entries = max_transfer_size / PAGE_SIZE;
4704
4705         /* +1 to cover when the buffer is not page-aligned. */
4706         max_sg_entries++;
4707
4708         max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries);
4709
4710         max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE;
4711
4712         ctrl_info->sg_chain_buffer_length =
4713                 (max_sg_entries * sizeof(struct pqi_sg_descriptor)) +
4714                 PQI_EXTRA_SGL_MEMORY;
4715         ctrl_info->sg_tablesize = max_sg_entries;
4716         ctrl_info->max_sectors = max_transfer_size / 512;
4717 }
4718
4719 static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info)
4720 {
4721         int num_queue_groups;
4722         u16 num_elements_per_iq;
4723         u16 num_elements_per_oq;
4724
4725         if (reset_devices) {
4726                 num_queue_groups = 1;
4727         } else {
4728                 int num_cpus;
4729                 int max_queue_groups;
4730
4731                 max_queue_groups = min(ctrl_info->max_inbound_queues / 2,
4732                         ctrl_info->max_outbound_queues - 1);
4733                 max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS);
4734
4735                 num_cpus = num_online_cpus();
4736                 num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors);
4737                 num_queue_groups = min(num_queue_groups, max_queue_groups);
4738         }
4739
4740         ctrl_info->num_queue_groups = num_queue_groups;
4741         ctrl_info->max_hw_queue_index = num_queue_groups - 1;
4742
4743         /*
4744          * Make sure that the max. inbound IU length is an even multiple
4745          * of our inbound element length.
4746          */
4747         ctrl_info->max_inbound_iu_length =
4748                 (ctrl_info->max_inbound_iu_length_per_firmware /
4749                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) *
4750                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
4751
4752         num_elements_per_iq =
4753                 (ctrl_info->max_inbound_iu_length /
4754                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
4755
4756         /* Add one because one element in each queue is unusable. */
4757         num_elements_per_iq++;
4758
4759         num_elements_per_iq = min(num_elements_per_iq,
4760                 ctrl_info->max_elements_per_iq);
4761
4762         num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1;
4763         num_elements_per_oq = min(num_elements_per_oq,
4764                 ctrl_info->max_elements_per_oq);
4765
4766         ctrl_info->num_elements_per_iq = num_elements_per_iq;
4767         ctrl_info->num_elements_per_oq = num_elements_per_oq;
4768
4769         ctrl_info->max_sg_per_iu =
4770                 ((ctrl_info->max_inbound_iu_length -
4771                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
4772                 sizeof(struct pqi_sg_descriptor)) +
4773                 PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
4774 }
4775
4776 static inline void pqi_set_sg_descriptor(
4777         struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg)
4778 {
4779         u64 address = (u64)sg_dma_address(sg);
4780         unsigned int length = sg_dma_len(sg);
4781
4782         put_unaligned_le64(address, &sg_descriptor->address);
4783         put_unaligned_le32(length, &sg_descriptor->length);
4784         put_unaligned_le32(0, &sg_descriptor->flags);
4785 }
4786
4787 static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info,
4788         struct pqi_raid_path_request *request, struct scsi_cmnd *scmd,
4789         struct pqi_io_request *io_request)
4790 {
4791         int i;
4792         u16 iu_length;
4793         int sg_count;
4794         bool chained;
4795         unsigned int num_sg_in_iu;
4796         unsigned int max_sg_per_iu;
4797         struct scatterlist *sg;
4798         struct pqi_sg_descriptor *sg_descriptor;
4799
4800         sg_count = scsi_dma_map(scmd);
4801         if (sg_count < 0)
4802                 return sg_count;
4803
4804         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
4805                 PQI_REQUEST_HEADER_LENGTH;
4806
4807         if (sg_count == 0)
4808                 goto out;
4809
4810         sg = scsi_sglist(scmd);
4811         sg_descriptor = request->sg_descriptors;
4812         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4813         chained = false;
4814         num_sg_in_iu = 0;
4815         i = 0;
4816
4817         while (1) {
4818                 pqi_set_sg_descriptor(sg_descriptor, sg);
4819                 if (!chained)
4820                         num_sg_in_iu++;
4821                 i++;
4822                 if (i == sg_count)
4823                         break;
4824                 sg_descriptor++;
4825                 if (i == max_sg_per_iu) {
4826                         put_unaligned_le64(
4827                                 (u64)io_request->sg_chain_buffer_dma_handle,
4828                                 &sg_descriptor->address);
4829                         put_unaligned_le32((sg_count - num_sg_in_iu)
4830                                 * sizeof(*sg_descriptor),
4831                                 &sg_descriptor->length);
4832                         put_unaligned_le32(CISS_SG_CHAIN,
4833                                 &sg_descriptor->flags);
4834                         chained = true;
4835                         num_sg_in_iu++;
4836                         sg_descriptor = io_request->sg_chain_buffer;
4837                 }
4838                 sg = sg_next(sg);
4839         }
4840
4841         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4842         request->partial = chained;
4843         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4844
4845 out:
4846         put_unaligned_le16(iu_length, &request->header.iu_length);
4847
4848         return 0;
4849 }
4850
4851 static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info,
4852         struct pqi_aio_path_request *request, struct scsi_cmnd *scmd,
4853         struct pqi_io_request *io_request)
4854 {
4855         int i;
4856         u16 iu_length;
4857         int sg_count;
4858         bool chained;
4859         unsigned int num_sg_in_iu;
4860         unsigned int max_sg_per_iu;
4861         struct scatterlist *sg;
4862         struct pqi_sg_descriptor *sg_descriptor;
4863
4864         sg_count = scsi_dma_map(scmd);
4865         if (sg_count < 0)
4866                 return sg_count;
4867
4868         iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
4869                 PQI_REQUEST_HEADER_LENGTH;
4870         num_sg_in_iu = 0;
4871
4872         if (sg_count == 0)
4873                 goto out;
4874
4875         sg = scsi_sglist(scmd);
4876         sg_descriptor = request->sg_descriptors;
4877         max_sg_per_iu = ctrl_info->max_sg_per_iu - 1;
4878         chained = false;
4879         i = 0;
4880
4881         while (1) {
4882                 pqi_set_sg_descriptor(sg_descriptor, sg);
4883                 if (!chained)
4884                         num_sg_in_iu++;
4885                 i++;
4886                 if (i == sg_count)
4887                         break;
4888                 sg_descriptor++;
4889                 if (i == max_sg_per_iu) {
4890                         put_unaligned_le64(
4891                                 (u64)io_request->sg_chain_buffer_dma_handle,
4892                                 &sg_descriptor->address);
4893                         put_unaligned_le32((sg_count - num_sg_in_iu)
4894                                 * sizeof(*sg_descriptor),
4895                                 &sg_descriptor->length);
4896                         put_unaligned_le32(CISS_SG_CHAIN,
4897                                 &sg_descriptor->flags);
4898                         chained = true;
4899                         num_sg_in_iu++;
4900                         sg_descriptor = io_request->sg_chain_buffer;
4901                 }
4902                 sg = sg_next(sg);
4903         }
4904
4905         put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags);
4906         request->partial = chained;
4907         iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
4908
4909 out:
4910         put_unaligned_le16(iu_length, &request->header.iu_length);
4911         request->num_sg_descriptors = num_sg_in_iu;
4912
4913         return 0;
4914 }
4915
4916 static void pqi_raid_io_complete(struct pqi_io_request *io_request,
4917         void *context)
4918 {
4919         struct scsi_cmnd *scmd;
4920
4921         scmd = io_request->scmd;
4922         pqi_free_io_request(io_request);
4923         scsi_dma_unmap(scmd);
4924         pqi_scsi_done(scmd);
4925 }
4926
4927 static int pqi_raid_submit_scsi_cmd_with_io_request(
4928         struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
4929         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
4930         struct pqi_queue_group *queue_group)
4931 {
4932         int rc;
4933         size_t cdb_length;
4934         struct pqi_raid_path_request *request;
4935
4936         io_request->io_complete_callback = pqi_raid_io_complete;
4937         io_request->scmd = scmd;
4938
4939         request = io_request->iu;
4940         memset(request, 0,
4941                 offsetof(struct pqi_raid_path_request, sg_descriptors));
4942
4943         request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
4944         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
4945         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
4946         put_unaligned_le16(io_request->index, &request->request_id);
4947         request->error_index = request->request_id;
4948         memcpy(request->lun_number, device->scsi3addr,
4949                 sizeof(request->lun_number));
4950
4951         cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb));
4952         memcpy(request->cdb, scmd->cmnd, cdb_length);
4953
4954         switch (cdb_length) {
4955         case 6:
4956         case 10:
4957         case 12:
4958         case 16:
4959                 /* No bytes in the Additional CDB bytes field */
4960                 request->additional_cdb_bytes_usage =
4961                         SOP_ADDITIONAL_CDB_BYTES_0;
4962                 break;
4963         case 20:
4964                 /* 4 bytes in the Additional cdb field */
4965                 request->additional_cdb_bytes_usage =
4966                         SOP_ADDITIONAL_CDB_BYTES_4;
4967                 break;
4968         case 24:
4969                 /* 8 bytes in the Additional cdb field */
4970                 request->additional_cdb_bytes_usage =
4971                         SOP_ADDITIONAL_CDB_BYTES_8;
4972                 break;
4973         case 28:
4974                 /* 12 bytes in the Additional cdb field */
4975                 request->additional_cdb_bytes_usage =
4976                         SOP_ADDITIONAL_CDB_BYTES_12;
4977                 break;
4978         case 32:
4979         default:
4980                 /* 16 bytes in the Additional cdb field */
4981                 request->additional_cdb_bytes_usage =
4982                         SOP_ADDITIONAL_CDB_BYTES_16;
4983                 break;
4984         }
4985
4986         switch (scmd->sc_data_direction) {
4987         case DMA_TO_DEVICE:
4988                 request->data_direction = SOP_READ_FLAG;
4989                 break;
4990         case DMA_FROM_DEVICE:
4991                 request->data_direction = SOP_WRITE_FLAG;
4992                 break;
4993         case DMA_NONE:
4994                 request->data_direction = SOP_NO_DIRECTION_FLAG;
4995                 break;
4996         case DMA_BIDIRECTIONAL:
4997                 request->data_direction = SOP_BIDIRECTIONAL;
4998                 break;
4999         default:
5000                 dev_err(&ctrl_info->pci_dev->dev,
5001                         "unknown data direction: %d\n",
5002                         scmd->sc_data_direction);
5003                 break;
5004         }
5005
5006         rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request);
5007         if (rc) {
5008                 pqi_free_io_request(io_request);
5009                 return SCSI_MLQUEUE_HOST_BUSY;
5010         }
5011
5012         pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request);
5013
5014         return 0;
5015 }
5016
5017 static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5018         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5019         struct pqi_queue_group *queue_group)
5020 {
5021         struct pqi_io_request *io_request;
5022
5023         io_request = pqi_alloc_io_request(ctrl_info);
5024
5025         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5026                 device, scmd, queue_group);
5027 }
5028
5029 static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info)
5030 {
5031         if (!pqi_ctrl_blocked(ctrl_info))
5032                 schedule_work(&ctrl_info->raid_bypass_retry_work);
5033 }
5034
5035 static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request)
5036 {
5037         struct scsi_cmnd *scmd;
5038         struct pqi_scsi_dev *device;
5039         struct pqi_ctrl_info *ctrl_info;
5040
5041         if (!io_request->raid_bypass)
5042                 return false;
5043
5044         scmd = io_request->scmd;
5045         if ((scmd->result & 0xff) == SAM_STAT_GOOD)
5046                 return false;
5047         if (host_byte(scmd->result) == DID_NO_CONNECT)
5048                 return false;
5049
5050         device = scmd->device->hostdata;
5051         if (pqi_device_offline(device))
5052                 return false;
5053
5054         ctrl_info = shost_to_hba(scmd->device->host);
5055         if (pqi_ctrl_offline(ctrl_info))
5056                 return false;
5057
5058         return true;
5059 }
5060
5061 static inline void pqi_add_to_raid_bypass_retry_list(
5062         struct pqi_ctrl_info *ctrl_info,
5063         struct pqi_io_request *io_request, bool at_head)
5064 {
5065         unsigned long flags;
5066
5067         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5068         if (at_head)
5069                 list_add(&io_request->request_list_entry,
5070                         &ctrl_info->raid_bypass_retry_list);
5071         else
5072                 list_add_tail(&io_request->request_list_entry,
5073                         &ctrl_info->raid_bypass_retry_list);
5074         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5075 }
5076
5077 static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request,
5078         void *context)
5079 {
5080         struct scsi_cmnd *scmd;
5081
5082         scmd = io_request->scmd;
5083         pqi_free_io_request(io_request);
5084         pqi_scsi_done(scmd);
5085 }
5086
5087 static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request)
5088 {
5089         struct scsi_cmnd *scmd;
5090         struct pqi_ctrl_info *ctrl_info;
5091
5092         io_request->io_complete_callback = pqi_queued_raid_bypass_complete;
5093         scmd = io_request->scmd;
5094         scmd->result = 0;
5095         ctrl_info = shost_to_hba(scmd->device->host);
5096
5097         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false);
5098         pqi_schedule_bypass_retry(ctrl_info);
5099 }
5100
5101 static int pqi_retry_raid_bypass(struct pqi_io_request *io_request)
5102 {
5103         struct scsi_cmnd *scmd;
5104         struct pqi_scsi_dev *device;
5105         struct pqi_ctrl_info *ctrl_info;
5106         struct pqi_queue_group *queue_group;
5107
5108         scmd = io_request->scmd;
5109         device = scmd->device->hostdata;
5110         if (pqi_device_in_reset(device)) {
5111                 pqi_free_io_request(io_request);
5112                 set_host_byte(scmd, DID_RESET);
5113                 pqi_scsi_done(scmd);
5114                 return 0;
5115         }
5116
5117         ctrl_info = shost_to_hba(scmd->device->host);
5118         queue_group = io_request->queue_group;
5119
5120         pqi_reinit_io_request(io_request);
5121
5122         return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request,
5123                 device, scmd, queue_group);
5124 }
5125
5126 static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request(
5127         struct pqi_ctrl_info *ctrl_info)
5128 {
5129         unsigned long flags;
5130         struct pqi_io_request *io_request;
5131
5132         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5133         io_request = list_first_entry_or_null(
5134                 &ctrl_info->raid_bypass_retry_list,
5135                 struct pqi_io_request, request_list_entry);
5136         if (io_request)
5137                 list_del(&io_request->request_list_entry);
5138         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5139
5140         return io_request;
5141 }
5142
5143 static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info)
5144 {
5145         int rc;
5146         struct pqi_io_request *io_request;
5147
5148         pqi_ctrl_busy(ctrl_info);
5149
5150         while (1) {
5151                 if (pqi_ctrl_blocked(ctrl_info))
5152                         break;
5153                 io_request = pqi_next_queued_raid_bypass_request(ctrl_info);
5154                 if (!io_request)
5155                         break;
5156                 rc = pqi_retry_raid_bypass(io_request);
5157                 if (rc) {
5158                         pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request,
5159                                 true);
5160                         pqi_schedule_bypass_retry(ctrl_info);
5161                         break;
5162                 }
5163         }
5164
5165         pqi_ctrl_unbusy(ctrl_info);
5166 }
5167
5168 static void pqi_raid_bypass_retry_worker(struct work_struct *work)
5169 {
5170         struct pqi_ctrl_info *ctrl_info;
5171
5172         ctrl_info = container_of(work, struct pqi_ctrl_info,
5173                 raid_bypass_retry_work);
5174         pqi_retry_raid_bypass_requests(ctrl_info);
5175 }
5176
5177 static void pqi_clear_all_queued_raid_bypass_retries(
5178         struct pqi_ctrl_info *ctrl_info)
5179 {
5180         unsigned long flags;
5181
5182         spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags);
5183         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
5184         spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags);
5185 }
5186
5187 static void pqi_aio_io_complete(struct pqi_io_request *io_request,
5188         void *context)
5189 {
5190         struct scsi_cmnd *scmd;
5191
5192         scmd = io_request->scmd;
5193         scsi_dma_unmap(scmd);
5194         if (io_request->status == -EAGAIN)
5195                 set_host_byte(scmd, DID_IMM_RETRY);
5196         else if (pqi_raid_bypass_retry_needed(io_request)) {
5197                 pqi_queue_raid_bypass_retry(io_request);
5198                 return;
5199         }
5200         pqi_free_io_request(io_request);
5201         pqi_scsi_done(scmd);
5202 }
5203
5204 static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
5205         struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
5206         struct pqi_queue_group *queue_group)
5207 {
5208         return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle,
5209                 scmd->cmnd, scmd->cmd_len, queue_group, NULL, false);
5210 }
5211
5212 static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info,
5213         struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
5214         unsigned int cdb_length, struct pqi_queue_group *queue_group,
5215         struct pqi_encryption_info *encryption_info, bool raid_bypass)
5216 {
5217         int rc;
5218         struct pqi_io_request *io_request;
5219         struct pqi_aio_path_request *request;
5220
5221         io_request = pqi_alloc_io_request(ctrl_info);
5222         io_request->io_complete_callback = pqi_aio_io_complete;
5223         io_request->scmd = scmd;
5224         io_request->raid_bypass = raid_bypass;
5225
5226         request = io_request->iu;
5227         memset(request, 0,
5228                 offsetof(struct pqi_raid_path_request, sg_descriptors));
5229
5230         request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO;
5231         put_unaligned_le32(aio_handle, &request->nexus_id);
5232         put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length);
5233         request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
5234         put_unaligned_le16(io_request->index, &request->request_id);
5235         request->error_index = request->request_id;
5236         if (cdb_length > sizeof(request->cdb))
5237                 cdb_length = sizeof(request->cdb);
5238         request->cdb_length = cdb_length;
5239         memcpy(request->cdb, cdb, cdb_length);
5240
5241         switch (scmd->sc_data_direction) {
5242         case DMA_TO_DEVICE:
5243                 request->data_direction = SOP_READ_FLAG;
5244                 break;
5245         case DMA_FROM_DEVICE:
5246                 request->data_direction = SOP_WRITE_FLAG;
5247                 break;
5248         case DMA_NONE:
5249                 request->data_direction = SOP_NO_DIRECTION_FLAG;
5250                 break;
5251         case DMA_BIDIRECTIONAL:
5252                 request->data_direction = SOP_BIDIRECTIONAL;
5253                 break;
5254         default:
5255                 dev_err(&ctrl_info->pci_dev->dev,
5256                         "unknown data direction: %d\n",
5257                         scmd->sc_data_direction);
5258                 break;
5259         }
5260
5261         if (encryption_info) {
5262                 request->encryption_enable = true;
5263                 put_unaligned_le16(encryption_info->data_encryption_key_index,
5264                         &request->data_encryption_key_index);
5265                 put_unaligned_le32(encryption_info->encrypt_tweak_lower,
5266                         &request->encrypt_tweak_lower);
5267                 put_unaligned_le32(encryption_info->encrypt_tweak_upper,
5268                         &request->encrypt_tweak_upper);
5269         }
5270
5271         rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request);
5272         if (rc) {
5273                 pqi_free_io_request(io_request);
5274                 return SCSI_MLQUEUE_HOST_BUSY;
5275         }
5276
5277         pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
5278
5279         return 0;
5280 }
5281
5282 static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
5283         struct scsi_cmnd *scmd)
5284 {
5285         u16 hw_queue;
5286
5287         hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
5288         if (hw_queue > ctrl_info->max_hw_queue_index)
5289                 hw_queue = 0;
5290
5291         return hw_queue;
5292 }
5293
5294 /*
5295  * This function gets called just before we hand the completed SCSI request
5296  * back to the SML.
5297  */
5298
5299 void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd)
5300 {
5301         struct pqi_scsi_dev *device;
5302
5303         if (!scmd->device) {
5304                 set_host_byte(scmd, DID_NO_CONNECT);
5305                 return;
5306         }
5307
5308         device = scmd->device->hostdata;
5309         if (!device) {
5310                 set_host_byte(scmd, DID_NO_CONNECT);
5311                 return;
5312         }
5313
5314         atomic_dec(&device->scsi_cmds_outstanding);
5315 }
5316
5317 static int pqi_scsi_queue_command(struct Scsi_Host *shost,
5318         struct scsi_cmnd *scmd)
5319 {
5320         int rc;
5321         struct pqi_ctrl_info *ctrl_info;
5322         struct pqi_scsi_dev *device;
5323         u16 hw_queue;
5324         struct pqi_queue_group *queue_group;
5325         bool raid_bypassed;
5326
5327         device = scmd->device->hostdata;
5328         ctrl_info = shost_to_hba(shost);
5329
5330         if (!device) {
5331                 set_host_byte(scmd, DID_NO_CONNECT);
5332                 pqi_scsi_done(scmd);
5333                 return 0;
5334         }
5335
5336         atomic_inc(&device->scsi_cmds_outstanding);
5337
5338         if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(ctrl_info,
5339                                                                 device)) {
5340                 set_host_byte(scmd, DID_NO_CONNECT);
5341                 pqi_scsi_done(scmd);
5342                 return 0;
5343         }
5344
5345         pqi_ctrl_busy(ctrl_info);
5346         if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) ||
5347             pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info)) {
5348                 rc = SCSI_MLQUEUE_HOST_BUSY;
5349                 goto out;
5350         }
5351
5352         /*
5353          * This is necessary because the SML doesn't zero out this field during
5354          * error recovery.
5355          */
5356         scmd->result = 0;
5357
5358         hw_queue = pqi_get_hw_queue(ctrl_info, scmd);
5359         queue_group = &ctrl_info->queue_groups[hw_queue];
5360
5361         if (pqi_is_logical_device(device)) {
5362                 raid_bypassed = false;
5363                 if (device->raid_bypass_enabled &&
5364                                 !blk_rq_is_passthrough(scmd->request)) {
5365                         rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
5366                                 scmd, queue_group);
5367                         if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY)
5368                                 raid_bypassed = true;
5369                 }
5370                 if (!raid_bypassed)
5371                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5372                                 queue_group);
5373         } else {
5374                 if (device->aio_enabled)
5375                         rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd,
5376                                 queue_group);
5377                 else
5378                         rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd,
5379                                 queue_group);
5380         }
5381
5382 out:
5383         pqi_ctrl_unbusy(ctrl_info);
5384         if (rc)
5385                 atomic_dec(&device->scsi_cmds_outstanding);
5386
5387         return rc;
5388 }
5389
5390 static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info,
5391         struct pqi_queue_group *queue_group)
5392 {
5393         unsigned int path;
5394         unsigned long flags;
5395         bool list_is_empty;
5396
5397         for (path = 0; path < 2; path++) {
5398                 while (1) {
5399                         spin_lock_irqsave(
5400                                 &queue_group->submit_lock[path], flags);
5401                         list_is_empty =
5402                                 list_empty(&queue_group->request_list[path]);
5403                         spin_unlock_irqrestore(
5404                                 &queue_group->submit_lock[path], flags);
5405                         if (list_is_empty)
5406                                 break;
5407                         pqi_check_ctrl_health(ctrl_info);
5408                         if (pqi_ctrl_offline(ctrl_info))
5409                                 return -ENXIO;
5410                         usleep_range(1000, 2000);
5411                 }
5412         }
5413
5414         return 0;
5415 }
5416
5417 static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info)
5418 {
5419         int rc;
5420         unsigned int i;
5421         unsigned int path;
5422         struct pqi_queue_group *queue_group;
5423         pqi_index_t iq_pi;
5424         pqi_index_t iq_ci;
5425
5426         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5427                 queue_group = &ctrl_info->queue_groups[i];
5428
5429                 rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group);
5430                 if (rc)
5431                         return rc;
5432
5433                 for (path = 0; path < 2; path++) {
5434                         iq_pi = queue_group->iq_pi_copy[path];
5435
5436                         while (1) {
5437                                 iq_ci = readl(queue_group->iq_ci[path]);
5438                                 if (iq_ci == iq_pi)
5439                                         break;
5440                                 pqi_check_ctrl_health(ctrl_info);
5441                                 if (pqi_ctrl_offline(ctrl_info))
5442                                         return -ENXIO;
5443                                 usleep_range(1000, 2000);
5444                         }
5445                 }
5446         }
5447
5448         return 0;
5449 }
5450
5451 static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info,
5452         struct pqi_scsi_dev *device)
5453 {
5454         unsigned int i;
5455         unsigned int path;
5456         struct pqi_queue_group *queue_group;
5457         unsigned long flags;
5458         struct pqi_io_request *io_request;
5459         struct pqi_io_request *next;
5460         struct scsi_cmnd *scmd;
5461         struct pqi_scsi_dev *scsi_device;
5462
5463         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5464                 queue_group = &ctrl_info->queue_groups[i];
5465
5466                 for (path = 0; path < 2; path++) {
5467                         spin_lock_irqsave(
5468                                 &queue_group->submit_lock[path], flags);
5469
5470                         list_for_each_entry_safe(io_request, next,
5471                                 &queue_group->request_list[path],
5472                                 request_list_entry) {
5473                                 scmd = io_request->scmd;
5474                                 if (!scmd)
5475                                         continue;
5476
5477                                 scsi_device = scmd->device->hostdata;
5478                                 if (scsi_device != device)
5479                                         continue;
5480
5481                                 list_del(&io_request->request_list_entry);
5482                                 set_host_byte(scmd, DID_RESET);
5483                                 pqi_scsi_done(scmd);
5484                         }
5485
5486                         spin_unlock_irqrestore(
5487                                 &queue_group->submit_lock[path], flags);
5488                 }
5489         }
5490 }
5491
5492 static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info)
5493 {
5494         unsigned int i;
5495         unsigned int path;
5496         struct pqi_queue_group *queue_group;
5497         unsigned long flags;
5498         struct pqi_io_request *io_request;
5499         struct pqi_io_request *next;
5500         struct scsi_cmnd *scmd;
5501
5502         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
5503                 queue_group = &ctrl_info->queue_groups[i];
5504
5505                 for (path = 0; path < 2; path++) {
5506                         spin_lock_irqsave(&queue_group->submit_lock[path],
5507                                                 flags);
5508
5509                         list_for_each_entry_safe(io_request, next,
5510                                 &queue_group->request_list[path],
5511                                 request_list_entry) {
5512
5513                                 scmd = io_request->scmd;
5514                                 if (!scmd)
5515                                         continue;
5516
5517                                 list_del(&io_request->request_list_entry);
5518                                 set_host_byte(scmd, DID_RESET);
5519                                 pqi_scsi_done(scmd);
5520                         }
5521
5522                         spin_unlock_irqrestore(
5523                                 &queue_group->submit_lock[path], flags);
5524                 }
5525         }
5526 }
5527
5528 static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5529         struct pqi_scsi_dev *device, unsigned long timeout_secs)
5530 {
5531         unsigned long timeout;
5532
5533         timeout = (timeout_secs * PQI_HZ) + jiffies;
5534
5535         while (atomic_read(&device->scsi_cmds_outstanding)) {
5536                 pqi_check_ctrl_health(ctrl_info);
5537                 if (pqi_ctrl_offline(ctrl_info))
5538                         return -ENXIO;
5539                 if (timeout_secs != NO_TIMEOUT) {
5540                         if (time_after(jiffies, timeout)) {
5541                                 dev_err(&ctrl_info->pci_dev->dev,
5542                                         "timed out waiting for pending IO\n");
5543                                 return -ETIMEDOUT;
5544                         }
5545                 }
5546                 usleep_range(1000, 2000);
5547         }
5548
5549         return 0;
5550 }
5551
5552 static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info,
5553         unsigned long timeout_secs)
5554 {
5555         bool io_pending;
5556         unsigned long flags;
5557         unsigned long timeout;
5558         struct pqi_scsi_dev *device;
5559
5560         timeout = (timeout_secs * PQI_HZ) + jiffies;
5561         while (1) {
5562                 io_pending = false;
5563
5564                 spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5565                 list_for_each_entry(device, &ctrl_info->scsi_device_list,
5566                         scsi_device_list_entry) {
5567                         if (atomic_read(&device->scsi_cmds_outstanding)) {
5568                                 io_pending = true;
5569                                 break;
5570                         }
5571                 }
5572                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
5573                                         flags);
5574
5575                 if (!io_pending)
5576                         break;
5577
5578                 pqi_check_ctrl_health(ctrl_info);
5579                 if (pqi_ctrl_offline(ctrl_info))
5580                         return -ENXIO;
5581
5582                 if (timeout_secs != NO_TIMEOUT) {
5583                         if (time_after(jiffies, timeout)) {
5584                                 dev_err(&ctrl_info->pci_dev->dev,
5585                                         "timed out waiting for pending IO\n");
5586                                 return -ETIMEDOUT;
5587                         }
5588                 }
5589                 usleep_range(1000, 2000);
5590         }
5591
5592         return 0;
5593 }
5594
5595 static int pqi_ctrl_wait_for_pending_sync_cmds(struct pqi_ctrl_info *ctrl_info)
5596 {
5597         while (atomic_read(&ctrl_info->sync_cmds_outstanding)) {
5598                 pqi_check_ctrl_health(ctrl_info);
5599                 if (pqi_ctrl_offline(ctrl_info))
5600                         return -ENXIO;
5601                 usleep_range(1000, 2000);
5602         }
5603
5604         return 0;
5605 }
5606
5607 static void pqi_lun_reset_complete(struct pqi_io_request *io_request,
5608         void *context)
5609 {
5610         struct completion *waiting = context;
5611
5612         complete(waiting);
5613 }
5614
5615 #define PQI_LUN_RESET_TIMEOUT_SECS      10
5616
5617 static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info,
5618         struct pqi_scsi_dev *device, struct completion *wait)
5619 {
5620         int rc;
5621
5622         while (1) {
5623                 if (wait_for_completion_io_timeout(wait,
5624                         PQI_LUN_RESET_TIMEOUT_SECS * PQI_HZ)) {
5625                         rc = 0;
5626                         break;
5627                 }
5628
5629                 pqi_check_ctrl_health(ctrl_info);
5630                 if (pqi_ctrl_offline(ctrl_info)) {
5631                         rc = -ENXIO;
5632                         break;
5633                 }
5634         }
5635
5636         return rc;
5637 }
5638
5639 static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info,
5640         struct pqi_scsi_dev *device)
5641 {
5642         int rc;
5643         struct pqi_io_request *io_request;
5644         DECLARE_COMPLETION_ONSTACK(wait);
5645         struct pqi_task_management_request *request;
5646
5647         io_request = pqi_alloc_io_request(ctrl_info);
5648         io_request->io_complete_callback = pqi_lun_reset_complete;
5649         io_request->context = &wait;
5650
5651         request = io_request->iu;
5652         memset(request, 0, sizeof(*request));
5653
5654         request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT;
5655         put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH,
5656                 &request->header.iu_length);
5657         put_unaligned_le16(io_request->index, &request->request_id);
5658         memcpy(request->lun_number, device->scsi3addr,
5659                 sizeof(request->lun_number));
5660         request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET;
5661
5662         pqi_start_io(ctrl_info,
5663                 &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
5664                 io_request);
5665
5666         rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait);
5667         if (rc == 0)
5668                 rc = io_request->status;
5669
5670         pqi_free_io_request(io_request);
5671
5672         return rc;
5673 }
5674
5675 /* Performs a reset at the LUN level. */
5676
5677 #define PQI_LUN_RESET_RETRIES                   3
5678 #define PQI_LUN_RESET_RETRY_INTERVAL_MSECS      10000
5679 #define PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS   120
5680
5681 static int _pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5682         struct pqi_scsi_dev *device)
5683 {
5684         int rc;
5685         unsigned int retries;
5686         unsigned long timeout_secs;
5687
5688         for (retries = 0;;) {
5689                 rc = pqi_lun_reset(ctrl_info, device);
5690                 if (rc != -EAGAIN || ++retries > PQI_LUN_RESET_RETRIES)
5691                         break;
5692                 msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS);
5693         }
5694
5695         timeout_secs = rc ? PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS : NO_TIMEOUT;
5696
5697         rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs);
5698
5699         return rc == 0 ? SUCCESS : FAILED;
5700 }
5701
5702 static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
5703         struct pqi_scsi_dev *device)
5704 {
5705         int rc;
5706
5707         mutex_lock(&ctrl_info->lun_reset_mutex);
5708
5709         pqi_ctrl_block_requests(ctrl_info);
5710         pqi_ctrl_wait_until_quiesced(ctrl_info);
5711         pqi_fail_io_queued_for_device(ctrl_info, device);
5712         rc = pqi_wait_until_inbound_queues_empty(ctrl_info);
5713         pqi_device_reset_start(device);
5714         pqi_ctrl_unblock_requests(ctrl_info);
5715
5716         if (rc)
5717                 rc = FAILED;
5718         else
5719                 rc = _pqi_device_reset(ctrl_info, device);
5720
5721         pqi_device_reset_done(device);
5722
5723         mutex_unlock(&ctrl_info->lun_reset_mutex);
5724
5725         return rc;
5726 }
5727
5728 static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
5729 {
5730         int rc;
5731         struct Scsi_Host *shost;
5732         struct pqi_ctrl_info *ctrl_info;
5733         struct pqi_scsi_dev *device;
5734
5735         shost = scmd->device->host;
5736         ctrl_info = shost_to_hba(shost);
5737         device = scmd->device->hostdata;
5738
5739         dev_err(&ctrl_info->pci_dev->dev,
5740                 "resetting scsi %d:%d:%d:%d\n",
5741                 shost->host_no, device->bus, device->target, device->lun);
5742
5743         pqi_check_ctrl_health(ctrl_info);
5744         if (pqi_ctrl_offline(ctrl_info) ||
5745                 pqi_device_reset_blocked(ctrl_info)) {
5746                 rc = FAILED;
5747                 goto out;
5748         }
5749
5750         pqi_wait_until_ofa_finished(ctrl_info);
5751
5752         atomic_inc(&ctrl_info->sync_cmds_outstanding);
5753         rc = pqi_device_reset(ctrl_info, device);
5754         atomic_dec(&ctrl_info->sync_cmds_outstanding);
5755
5756 out:
5757         dev_err(&ctrl_info->pci_dev->dev,
5758                 "reset of scsi %d:%d:%d:%d: %s\n",
5759                 shost->host_no, device->bus, device->target, device->lun,
5760                 rc == SUCCESS ? "SUCCESS" : "FAILED");
5761
5762         return rc;
5763 }
5764
5765 static int pqi_slave_alloc(struct scsi_device *sdev)
5766 {
5767         struct pqi_scsi_dev *device;
5768         unsigned long flags;
5769         struct pqi_ctrl_info *ctrl_info;
5770         struct scsi_target *starget;
5771         struct sas_rphy *rphy;
5772
5773         ctrl_info = shost_to_hba(sdev->host);
5774
5775         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
5776
5777         if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) {
5778                 starget = scsi_target(sdev);
5779                 rphy = target_to_rphy(starget);
5780                 device = pqi_find_device_by_sas_rphy(ctrl_info, rphy);
5781                 if (device) {
5782                         device->target = sdev_id(sdev);
5783                         device->lun = sdev->lun;
5784                         device->target_lun_valid = true;
5785                 }
5786         } else {
5787                 device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev),
5788                         sdev_id(sdev), sdev->lun);
5789         }
5790
5791         if (device) {
5792                 sdev->hostdata = device;
5793                 device->sdev = sdev;
5794                 if (device->queue_depth) {
5795                         device->advertised_queue_depth = device->queue_depth;
5796                         scsi_change_queue_depth(sdev,
5797                                 device->advertised_queue_depth);
5798                 }
5799                 if (pqi_is_logical_device(device))
5800                         pqi_disable_write_same(sdev);
5801                 else
5802                         sdev->allow_restart = 1;
5803         }
5804
5805         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
5806
5807         return 0;
5808 }
5809
5810 static int pqi_map_queues(struct Scsi_Host *shost)
5811 {
5812         struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
5813
5814         return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT],
5815                                         ctrl_info->pci_dev, 0);
5816 }
5817
5818 static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
5819         void __user *arg)
5820 {
5821         struct pci_dev *pci_dev;
5822         u32 subsystem_vendor;
5823         u32 subsystem_device;
5824         cciss_pci_info_struct pciinfo;
5825
5826         if (!arg)
5827                 return -EINVAL;
5828
5829         pci_dev = ctrl_info->pci_dev;
5830
5831         pciinfo.domain = pci_domain_nr(pci_dev->bus);
5832         pciinfo.bus = pci_dev->bus->number;
5833         pciinfo.dev_fn = pci_dev->devfn;
5834         subsystem_vendor = pci_dev->subsystem_vendor;
5835         subsystem_device = pci_dev->subsystem_device;
5836         pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) |
5837                 subsystem_vendor;
5838
5839         if (copy_to_user(arg, &pciinfo, sizeof(pciinfo)))
5840                 return -EFAULT;
5841
5842         return 0;
5843 }
5844
5845 static int pqi_getdrivver_ioctl(void __user *arg)
5846 {
5847         u32 version;
5848
5849         if (!arg)
5850                 return -EINVAL;
5851
5852         version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) |
5853                 (DRIVER_RELEASE << 16) | DRIVER_REVISION;
5854
5855         if (copy_to_user(arg, &version, sizeof(version)))
5856                 return -EFAULT;
5857
5858         return 0;
5859 }
5860
5861 struct ciss_error_info {
5862         u8      scsi_status;
5863         int     command_status;
5864         size_t  sense_data_length;
5865 };
5866
5867 static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info,
5868         struct ciss_error_info *ciss_error_info)
5869 {
5870         int ciss_cmd_status;
5871         size_t sense_data_length;
5872
5873         switch (pqi_error_info->data_out_result) {
5874         case PQI_DATA_IN_OUT_GOOD:
5875                 ciss_cmd_status = CISS_CMD_STATUS_SUCCESS;
5876                 break;
5877         case PQI_DATA_IN_OUT_UNDERFLOW:
5878                 ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN;
5879                 break;
5880         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW:
5881                 ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN;
5882                 break;
5883         case PQI_DATA_IN_OUT_PROTOCOL_ERROR:
5884         case PQI_DATA_IN_OUT_BUFFER_ERROR:
5885         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA:
5886         case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE:
5887         case PQI_DATA_IN_OUT_ERROR:
5888                 ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR;
5889                 break;
5890         case PQI_DATA_IN_OUT_HARDWARE_ERROR:
5891         case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR:
5892         case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT:
5893         case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED:
5894         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED:
5895         case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED:
5896         case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST:
5897         case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION:
5898         case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED:
5899         case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ:
5900                 ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR;
5901                 break;
5902         case PQI_DATA_IN_OUT_UNSOLICITED_ABORT:
5903                 ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT;
5904                 break;
5905         case PQI_DATA_IN_OUT_ABORTED:
5906                 ciss_cmd_status = CISS_CMD_STATUS_ABORTED;
5907                 break;
5908         case PQI_DATA_IN_OUT_TIMEOUT:
5909                 ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT;
5910                 break;
5911         default:
5912                 ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS;
5913                 break;
5914         }
5915
5916         sense_data_length =
5917                 get_unaligned_le16(&pqi_error_info->sense_data_length);
5918         if (sense_data_length == 0)
5919                 sense_data_length =
5920                 get_unaligned_le16(&pqi_error_info->response_data_length);
5921         if (sense_data_length)
5922                 if (sense_data_length > sizeof(pqi_error_info->data))
5923                         sense_data_length = sizeof(pqi_error_info->data);
5924
5925         ciss_error_info->scsi_status = pqi_error_info->status;
5926         ciss_error_info->command_status = ciss_cmd_status;
5927         ciss_error_info->sense_data_length = sense_data_length;
5928 }
5929
5930 static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg)
5931 {
5932         int rc;
5933         char *kernel_buffer = NULL;
5934         u16 iu_length;
5935         size_t sense_data_length;
5936         IOCTL_Command_struct iocommand;
5937         struct pqi_raid_path_request request;
5938         struct pqi_raid_error_info pqi_error_info;
5939         struct ciss_error_info ciss_error_info;
5940
5941         if (pqi_ctrl_offline(ctrl_info))
5942                 return -ENXIO;
5943         if (!arg)
5944                 return -EINVAL;
5945         if (!capable(CAP_SYS_RAWIO))
5946                 return -EPERM;
5947         if (copy_from_user(&iocommand, arg, sizeof(iocommand)))
5948                 return -EFAULT;
5949         if (iocommand.buf_size < 1 &&
5950                 iocommand.Request.Type.Direction != XFER_NONE)
5951                 return -EINVAL;
5952         if (iocommand.Request.CDBLen > sizeof(request.cdb))
5953                 return -EINVAL;
5954         if (iocommand.Request.Type.Type != TYPE_CMD)
5955                 return -EINVAL;
5956
5957         switch (iocommand.Request.Type.Direction) {
5958         case XFER_NONE:
5959         case XFER_WRITE:
5960         case XFER_READ:
5961         case XFER_READ | XFER_WRITE:
5962                 break;
5963         default:
5964                 return -EINVAL;
5965         }
5966
5967         if (iocommand.buf_size > 0) {
5968                 kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL);
5969                 if (!kernel_buffer)
5970                         return -ENOMEM;
5971                 if (iocommand.Request.Type.Direction & XFER_WRITE) {
5972                         if (copy_from_user(kernel_buffer, iocommand.buf,
5973                                 iocommand.buf_size)) {
5974                                 rc = -EFAULT;
5975                                 goto out;
5976                         }
5977                 } else {
5978                         memset(kernel_buffer, 0, iocommand.buf_size);
5979                 }
5980         }
5981
5982         memset(&request, 0, sizeof(request));
5983
5984         request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO;
5985         iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) -
5986                 PQI_REQUEST_HEADER_LENGTH;
5987         memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes,
5988                 sizeof(request.lun_number));
5989         memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen);
5990         request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0;
5991
5992         switch (iocommand.Request.Type.Direction) {
5993         case XFER_NONE:
5994                 request.data_direction = SOP_NO_DIRECTION_FLAG;
5995                 break;
5996         case XFER_WRITE:
5997                 request.data_direction = SOP_WRITE_FLAG;
5998                 break;
5999         case XFER_READ:
6000                 request.data_direction = SOP_READ_FLAG;
6001                 break;
6002         case XFER_READ | XFER_WRITE:
6003                 request.data_direction = SOP_BIDIRECTIONAL;
6004                 break;
6005         }
6006
6007         request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
6008
6009         if (iocommand.buf_size > 0) {
6010                 put_unaligned_le32(iocommand.buf_size, &request.buffer_length);
6011
6012                 rc = pqi_map_single(ctrl_info->pci_dev,
6013                         &request.sg_descriptors[0], kernel_buffer,
6014                         iocommand.buf_size, DMA_BIDIRECTIONAL);
6015                 if (rc)
6016                         goto out;
6017
6018                 iu_length += sizeof(request.sg_descriptors[0]);
6019         }
6020
6021         put_unaligned_le16(iu_length, &request.header.iu_length);
6022
6023         rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6024                 PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT);
6025
6026         if (iocommand.buf_size > 0)
6027                 pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
6028                         DMA_BIDIRECTIONAL);
6029
6030         memset(&iocommand.error_info, 0, sizeof(iocommand.error_info));
6031
6032         if (rc == 0) {
6033                 pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info);
6034                 iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status;
6035                 iocommand.error_info.CommandStatus =
6036                         ciss_error_info.command_status;
6037                 sense_data_length = ciss_error_info.sense_data_length;
6038                 if (sense_data_length) {
6039                         if (sense_data_length >
6040                                 sizeof(iocommand.error_info.SenseInfo))
6041                                 sense_data_length =
6042                                         sizeof(iocommand.error_info.SenseInfo);
6043                         memcpy(iocommand.error_info.SenseInfo,
6044                                 pqi_error_info.data, sense_data_length);
6045                         iocommand.error_info.SenseLen = sense_data_length;
6046                 }
6047         }
6048
6049         if (copy_to_user(arg, &iocommand, sizeof(iocommand))) {
6050                 rc = -EFAULT;
6051                 goto out;
6052         }
6053
6054         if (rc == 0 && iocommand.buf_size > 0 &&
6055                 (iocommand.Request.Type.Direction & XFER_READ)) {
6056                 if (copy_to_user(iocommand.buf, kernel_buffer,
6057                         iocommand.buf_size)) {
6058                         rc = -EFAULT;
6059                 }
6060         }
6061
6062 out:
6063         kfree(kernel_buffer);
6064
6065         return rc;
6066 }
6067
6068 static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd,
6069                      void __user *arg)
6070 {
6071         int rc;
6072         struct pqi_ctrl_info *ctrl_info;
6073
6074         ctrl_info = shost_to_hba(sdev->host);
6075
6076         if (pqi_ctrl_in_ofa(ctrl_info) ||
6077                 pqi_ctrl_in_shutdown(ctrl_info))
6078                 return -EBUSY;
6079
6080         switch (cmd) {
6081         case CCISS_DEREGDISK:
6082         case CCISS_REGNEWDISK:
6083         case CCISS_REGNEWD:
6084                 rc = pqi_scan_scsi_devices(ctrl_info);
6085                 break;
6086         case CCISS_GETPCIINFO:
6087                 rc = pqi_getpciinfo_ioctl(ctrl_info, arg);
6088                 break;
6089         case CCISS_GETDRIVVER:
6090                 rc = pqi_getdrivver_ioctl(arg);
6091                 break;
6092         case CCISS_PASSTHRU:
6093                 rc = pqi_passthru_ioctl(ctrl_info, arg);
6094                 break;
6095         default:
6096                 rc = -EINVAL;
6097                 break;
6098         }
6099
6100         return rc;
6101 }
6102
6103 static ssize_t pqi_firmware_version_show(struct device *dev,
6104         struct device_attribute *attr, char *buffer)
6105 {
6106         struct Scsi_Host *shost;
6107         struct pqi_ctrl_info *ctrl_info;
6108
6109         shost = class_to_shost(dev);
6110         ctrl_info = shost_to_hba(shost);
6111
6112         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version);
6113 }
6114
6115 static ssize_t pqi_driver_version_show(struct device *dev,
6116         struct device_attribute *attr, char *buffer)
6117 {
6118         struct Scsi_Host *shost;
6119         struct pqi_ctrl_info *ctrl_info;
6120
6121         shost = class_to_shost(dev);
6122         ctrl_info = shost_to_hba(shost);
6123
6124         return snprintf(buffer, PAGE_SIZE,
6125                 "%s\n", DRIVER_VERSION BUILD_TIMESTAMP);
6126 }
6127
6128 static ssize_t pqi_serial_number_show(struct device *dev,
6129         struct device_attribute *attr, char *buffer)
6130 {
6131         struct Scsi_Host *shost;
6132         struct pqi_ctrl_info *ctrl_info;
6133
6134         shost = class_to_shost(dev);
6135         ctrl_info = shost_to_hba(shost);
6136
6137         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number);
6138 }
6139
6140 static ssize_t pqi_model_show(struct device *dev,
6141         struct device_attribute *attr, char *buffer)
6142 {
6143         struct Scsi_Host *shost;
6144         struct pqi_ctrl_info *ctrl_info;
6145
6146         shost = class_to_shost(dev);
6147         ctrl_info = shost_to_hba(shost);
6148
6149         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model);
6150 }
6151
6152 static ssize_t pqi_vendor_show(struct device *dev,
6153         struct device_attribute *attr, char *buffer)
6154 {
6155         struct Scsi_Host *shost;
6156         struct pqi_ctrl_info *ctrl_info;
6157
6158         shost = class_to_shost(dev);
6159         ctrl_info = shost_to_hba(shost);
6160
6161         return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor);
6162 }
6163
6164 static ssize_t pqi_host_rescan_store(struct device *dev,
6165         struct device_attribute *attr, const char *buffer, size_t count)
6166 {
6167         struct Scsi_Host *shost = class_to_shost(dev);
6168
6169         pqi_scan_start(shost);
6170
6171         return count;
6172 }
6173
6174 static ssize_t pqi_lockup_action_show(struct device *dev,
6175         struct device_attribute *attr, char *buffer)
6176 {
6177         int count = 0;
6178         unsigned int i;
6179
6180         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6181                 if (pqi_lockup_actions[i].action == pqi_lockup_action)
6182                         count += snprintf(buffer + count, PAGE_SIZE - count,
6183                                 "[%s] ", pqi_lockup_actions[i].name);
6184                 else
6185                         count += snprintf(buffer + count, PAGE_SIZE - count,
6186                                 "%s ", pqi_lockup_actions[i].name);
6187         }
6188
6189         count += snprintf(buffer + count, PAGE_SIZE - count, "\n");
6190
6191         return count;
6192 }
6193
6194 static ssize_t pqi_lockup_action_store(struct device *dev,
6195         struct device_attribute *attr, const char *buffer, size_t count)
6196 {
6197         unsigned int i;
6198         char *action_name;
6199         char action_name_buffer[32];
6200
6201         strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer));
6202         action_name = strstrip(action_name_buffer);
6203
6204         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
6205                 if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) {
6206                         pqi_lockup_action = pqi_lockup_actions[i].action;
6207                         return count;
6208                 }
6209         }
6210
6211         return -EINVAL;
6212 }
6213
6214 static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
6215 static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
6216 static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
6217 static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL);
6218 static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL);
6219 static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
6220 static DEVICE_ATTR(lockup_action, 0644,
6221         pqi_lockup_action_show, pqi_lockup_action_store);
6222
6223 static struct device_attribute *pqi_shost_attrs[] = {
6224         &dev_attr_driver_version,
6225         &dev_attr_firmware_version,
6226         &dev_attr_model,
6227         &dev_attr_serial_number,
6228         &dev_attr_vendor,
6229         &dev_attr_rescan,
6230         &dev_attr_lockup_action,
6231         NULL
6232 };
6233
6234 static ssize_t pqi_unique_id_show(struct device *dev,
6235         struct device_attribute *attr, char *buffer)
6236 {
6237         struct pqi_ctrl_info *ctrl_info;
6238         struct scsi_device *sdev;
6239         struct pqi_scsi_dev *device;
6240         unsigned long flags;
6241         u8 unique_id[16];
6242
6243         sdev = to_scsi_device(dev);
6244         ctrl_info = shost_to_hba(sdev->host);
6245
6246         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6247
6248         device = sdev->hostdata;
6249         if (!device) {
6250                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6251                         flags);
6252                 return -ENODEV;
6253         }
6254
6255         if (device->is_physical_device) {
6256                 memset(unique_id, 0, 8);
6257                 memcpy(unique_id + 8, &device->wwid, sizeof(device->wwid));
6258         } else {
6259                 memcpy(unique_id, device->volume_id, sizeof(device->volume_id));
6260         }
6261
6262         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6263
6264         return snprintf(buffer, PAGE_SIZE,
6265                 "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n",
6266                 unique_id[0], unique_id[1], unique_id[2], unique_id[3],
6267                 unique_id[4], unique_id[5], unique_id[6], unique_id[7],
6268                 unique_id[8], unique_id[9], unique_id[10], unique_id[11],
6269                 unique_id[12], unique_id[13], unique_id[14], unique_id[15]);
6270 }
6271
6272 static ssize_t pqi_lunid_show(struct device *dev,
6273         struct device_attribute *attr, char *buffer)
6274 {
6275         struct pqi_ctrl_info *ctrl_info;
6276         struct scsi_device *sdev;
6277         struct pqi_scsi_dev *device;
6278         unsigned long flags;
6279         u8 lunid[8];
6280
6281         sdev = to_scsi_device(dev);
6282         ctrl_info = shost_to_hba(sdev->host);
6283
6284         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6285
6286         device = sdev->hostdata;
6287         if (!device) {
6288                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6289                         flags);
6290                 return -ENODEV;
6291         }
6292         memcpy(lunid, device->scsi3addr, sizeof(lunid));
6293
6294         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6295
6296         return snprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid);
6297 }
6298
6299 #define MAX_PATHS 8
6300 static ssize_t pqi_path_info_show(struct device *dev,
6301         struct device_attribute *attr, char *buf)
6302 {
6303         struct pqi_ctrl_info *ctrl_info;
6304         struct scsi_device *sdev;
6305         struct pqi_scsi_dev *device;
6306         unsigned long flags;
6307         int i;
6308         int output_len = 0;
6309         u8 box;
6310         u8 bay;
6311         u8 path_map_index = 0;
6312         char *active;
6313         unsigned char phys_connector[2];
6314
6315         sdev = to_scsi_device(dev);
6316         ctrl_info = shost_to_hba(sdev->host);
6317
6318         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6319
6320         device = sdev->hostdata;
6321         if (!device) {
6322                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6323                         flags);
6324                 return -ENODEV;
6325         }
6326
6327         bay = device->bay;
6328         for (i = 0; i < MAX_PATHS; i++) {
6329                 path_map_index = 1<<i;
6330                 if (i == device->active_path_index)
6331                         active = "Active";
6332                 else if (device->path_map & path_map_index)
6333                         active = "Inactive";
6334                 else
6335                         continue;
6336
6337                 output_len += scnprintf(buf + output_len,
6338                                         PAGE_SIZE - output_len,
6339                                         "[%d:%d:%d:%d] %20.20s ",
6340                                         ctrl_info->scsi_host->host_no,
6341                                         device->bus, device->target,
6342                                         device->lun,
6343                                         scsi_device_type(device->devtype));
6344
6345                 if (device->devtype == TYPE_RAID ||
6346                         pqi_is_logical_device(device))
6347                         goto end_buffer;
6348
6349                 memcpy(&phys_connector, &device->phys_connector[i],
6350                         sizeof(phys_connector));
6351                 if (phys_connector[0] < '0')
6352                         phys_connector[0] = '0';
6353                 if (phys_connector[1] < '0')
6354                         phys_connector[1] = '0';
6355
6356                 output_len += scnprintf(buf + output_len,
6357                                         PAGE_SIZE - output_len,
6358                                         "PORT: %.2s ", phys_connector);
6359
6360                 box = device->box[i];
6361                 if (box != 0 && box != 0xFF)
6362                         output_len += scnprintf(buf + output_len,
6363                                                 PAGE_SIZE - output_len,
6364                                                 "BOX: %hhu ", box);
6365
6366                 if ((device->devtype == TYPE_DISK ||
6367                         device->devtype == TYPE_ZBC) &&
6368                         pqi_expose_device(device))
6369                         output_len += scnprintf(buf + output_len,
6370                                                 PAGE_SIZE - output_len,
6371                                                 "BAY: %hhu ", bay);
6372
6373 end_buffer:
6374                 output_len += scnprintf(buf + output_len,
6375                                         PAGE_SIZE - output_len,
6376                                         "%s\n", active);
6377         }
6378
6379         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6380         return output_len;
6381 }
6382
6383
6384 static ssize_t pqi_sas_address_show(struct device *dev,
6385         struct device_attribute *attr, char *buffer)
6386 {
6387         struct pqi_ctrl_info *ctrl_info;
6388         struct scsi_device *sdev;
6389         struct pqi_scsi_dev *device;
6390         unsigned long flags;
6391         u64 sas_address;
6392
6393         sdev = to_scsi_device(dev);
6394         ctrl_info = shost_to_hba(sdev->host);
6395
6396         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6397
6398         device = sdev->hostdata;
6399         if (pqi_is_logical_device(device)) {
6400                 spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock,
6401                         flags);
6402                 return -ENODEV;
6403         }
6404         sas_address = device->sas_address;
6405
6406         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6407
6408         return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address);
6409 }
6410
6411 static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev,
6412         struct device_attribute *attr, char *buffer)
6413 {
6414         struct pqi_ctrl_info *ctrl_info;
6415         struct scsi_device *sdev;
6416         struct pqi_scsi_dev *device;
6417         unsigned long flags;
6418
6419         sdev = to_scsi_device(dev);
6420         ctrl_info = shost_to_hba(sdev->host);
6421
6422         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6423
6424         device = sdev->hostdata;
6425         buffer[0] = device->raid_bypass_enabled ? '1' : '0';
6426         buffer[1] = '\n';
6427         buffer[2] = '\0';
6428
6429         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6430
6431         return 2;
6432 }
6433
6434 static ssize_t pqi_raid_level_show(struct device *dev,
6435         struct device_attribute *attr, char *buffer)
6436 {
6437         struct pqi_ctrl_info *ctrl_info;
6438         struct scsi_device *sdev;
6439         struct pqi_scsi_dev *device;
6440         unsigned long flags;
6441         char *raid_level;
6442
6443         sdev = to_scsi_device(dev);
6444         ctrl_info = shost_to_hba(sdev->host);
6445
6446         spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
6447
6448         device = sdev->hostdata;
6449
6450         if (pqi_is_logical_device(device))
6451                 raid_level = pqi_raid_level_to_string(device->raid_level);
6452         else
6453                 raid_level = "N/A";
6454
6455         spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
6456
6457         return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level);
6458 }
6459
6460 static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL);
6461 static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL);
6462 static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL);
6463 static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL);
6464 static DEVICE_ATTR(ssd_smart_path_enabled, 0444,
6465         pqi_ssd_smart_path_enabled_show, NULL);
6466 static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL);
6467
6468 static struct device_attribute *pqi_sdev_attrs[] = {
6469         &dev_attr_lunid,
6470         &dev_attr_unique_id,
6471         &dev_attr_path_info,
6472         &dev_attr_sas_address,
6473         &dev_attr_ssd_smart_path_enabled,
6474         &dev_attr_raid_level,
6475         NULL
6476 };
6477
6478 static struct scsi_host_template pqi_driver_template = {
6479         .module = THIS_MODULE,
6480         .name = DRIVER_NAME_SHORT,
6481         .proc_name = DRIVER_NAME_SHORT,
6482         .queuecommand = pqi_scsi_queue_command,
6483         .scan_start = pqi_scan_start,
6484         .scan_finished = pqi_scan_finished,
6485         .this_id = -1,
6486         .eh_device_reset_handler = pqi_eh_device_reset_handler,
6487         .ioctl = pqi_ioctl,
6488         .slave_alloc = pqi_slave_alloc,
6489         .map_queues = pqi_map_queues,
6490         .sdev_attrs = pqi_sdev_attrs,
6491         .shost_attrs = pqi_shost_attrs,
6492 };
6493
6494 static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info)
6495 {
6496         int rc;
6497         struct Scsi_Host *shost;
6498
6499         shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info));
6500         if (!shost) {
6501                 dev_err(&ctrl_info->pci_dev->dev,
6502                         "scsi_host_alloc failed for controller %u\n",
6503                         ctrl_info->ctrl_id);
6504                 return -ENOMEM;
6505         }
6506
6507         shost->io_port = 0;
6508         shost->n_io_port = 0;
6509         shost->this_id = -1;
6510         shost->max_channel = PQI_MAX_BUS;
6511         shost->max_cmd_len = MAX_COMMAND_SIZE;
6512         shost->max_lun = ~0;
6513         shost->max_id = ~0;
6514         shost->max_sectors = ctrl_info->max_sectors;
6515         shost->can_queue = ctrl_info->scsi_ml_can_queue;
6516         shost->cmd_per_lun = shost->can_queue;
6517         shost->sg_tablesize = ctrl_info->sg_tablesize;
6518         shost->transportt = pqi_sas_transport_template;
6519         shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0);
6520         shost->unique_id = shost->irq;
6521         shost->nr_hw_queues = ctrl_info->num_queue_groups;
6522         shost->hostdata[0] = (unsigned long)ctrl_info;
6523
6524         rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev);
6525         if (rc) {
6526                 dev_err(&ctrl_info->pci_dev->dev,
6527                         "scsi_add_host failed for controller %u\n",
6528                         ctrl_info->ctrl_id);
6529                 goto free_host;
6530         }
6531
6532         rc = pqi_add_sas_host(shost, ctrl_info);
6533         if (rc) {
6534                 dev_err(&ctrl_info->pci_dev->dev,
6535                         "add SAS host failed for controller %u\n",
6536                         ctrl_info->ctrl_id);
6537                 goto remove_host;
6538         }
6539
6540         ctrl_info->scsi_host = shost;
6541
6542         return 0;
6543
6544 remove_host:
6545         scsi_remove_host(shost);
6546 free_host:
6547         scsi_host_put(shost);
6548
6549         return rc;
6550 }
6551
6552 static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info)
6553 {
6554         struct Scsi_Host *shost;
6555
6556         pqi_delete_sas_host(ctrl_info);
6557
6558         shost = ctrl_info->scsi_host;
6559         if (!shost)
6560                 return;
6561
6562         scsi_remove_host(shost);
6563         scsi_host_put(shost);
6564 }
6565
6566 static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info)
6567 {
6568         int rc = 0;
6569         struct pqi_device_registers __iomem *pqi_registers;
6570         unsigned long timeout;
6571         unsigned int timeout_msecs;
6572         union pqi_reset_register reset_reg;
6573
6574         pqi_registers = ctrl_info->pqi_registers;
6575         timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100;
6576         timeout = msecs_to_jiffies(timeout_msecs) + jiffies;
6577
6578         while (1) {
6579                 msleep(PQI_RESET_POLL_INTERVAL_MSECS);
6580                 reset_reg.all_bits = readl(&pqi_registers->device_reset);
6581                 if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED)
6582                         break;
6583                 pqi_check_ctrl_health(ctrl_info);
6584                 if (pqi_ctrl_offline(ctrl_info)) {
6585                         rc = -ENXIO;
6586                         break;
6587                 }
6588                 if (time_after(jiffies, timeout)) {
6589                         rc = -ETIMEDOUT;
6590                         break;
6591                 }
6592         }
6593
6594         return rc;
6595 }
6596
6597 static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
6598 {
6599         int rc;
6600         union pqi_reset_register reset_reg;
6601
6602         if (ctrl_info->pqi_reset_quiesce_supported) {
6603                 rc = sis_pqi_reset_quiesce(ctrl_info);
6604                 if (rc) {
6605                         dev_err(&ctrl_info->pci_dev->dev,
6606                                 "PQI reset failed during quiesce with error %d\n",
6607                                 rc);
6608                         return rc;
6609                 }
6610         }
6611
6612         reset_reg.all_bits = 0;
6613         reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET;
6614         reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET;
6615
6616         writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset);
6617
6618         rc = pqi_wait_for_pqi_reset_completion(ctrl_info);
6619         if (rc)
6620                 dev_err(&ctrl_info->pci_dev->dev,
6621                         "PQI reset failed with error %d\n", rc);
6622
6623         return rc;
6624 }
6625
6626 static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info)
6627 {
6628         int rc;
6629         struct bmic_sense_subsystem_info *sense_info;
6630
6631         sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL);
6632         if (!sense_info)
6633                 return -ENOMEM;
6634
6635         rc = pqi_sense_subsystem_info(ctrl_info, sense_info);
6636         if (rc)
6637                 goto out;
6638
6639         memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number,
6640                 sizeof(sense_info->ctrl_serial_number));
6641         ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0';
6642
6643 out:
6644         kfree(sense_info);
6645
6646         return rc;
6647 }
6648
6649 static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info)
6650 {
6651         int rc;
6652         struct bmic_identify_controller *identify;
6653
6654         identify = kmalloc(sizeof(*identify), GFP_KERNEL);
6655         if (!identify)
6656                 return -ENOMEM;
6657
6658         rc = pqi_identify_controller(ctrl_info, identify);
6659         if (rc)
6660                 goto out;
6661
6662         memcpy(ctrl_info->firmware_version, identify->firmware_version,
6663                 sizeof(identify->firmware_version));
6664         ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0';
6665         snprintf(ctrl_info->firmware_version +
6666                 strlen(ctrl_info->firmware_version),
6667                 sizeof(ctrl_info->firmware_version),
6668                 "-%u", get_unaligned_le16(&identify->firmware_build_number));
6669
6670         memcpy(ctrl_info->model, identify->product_id,
6671                 sizeof(identify->product_id));
6672         ctrl_info->model[sizeof(identify->product_id)] = '\0';
6673
6674         memcpy(ctrl_info->vendor, identify->vendor_id,
6675                 sizeof(identify->vendor_id));
6676         ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0';
6677
6678 out:
6679         kfree(identify);
6680
6681         return rc;
6682 }
6683
6684 struct pqi_config_table_section_info {
6685         struct pqi_ctrl_info *ctrl_info;
6686         void            *section;
6687         u32             section_offset;
6688         void __iomem    *section_iomem_addr;
6689 };
6690
6691 static inline bool pqi_is_firmware_feature_supported(
6692         struct pqi_config_table_firmware_features *firmware_features,
6693         unsigned int bit_position)
6694 {
6695         unsigned int byte_index;
6696
6697         byte_index = bit_position / BITS_PER_BYTE;
6698
6699         if (byte_index >= le16_to_cpu(firmware_features->num_elements))
6700                 return false;
6701
6702         return firmware_features->features_supported[byte_index] &
6703                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6704 }
6705
6706 static inline bool pqi_is_firmware_feature_enabled(
6707         struct pqi_config_table_firmware_features *firmware_features,
6708         void __iomem *firmware_features_iomem_addr,
6709         unsigned int bit_position)
6710 {
6711         unsigned int byte_index;
6712         u8 __iomem *features_enabled_iomem_addr;
6713
6714         byte_index = (bit_position / BITS_PER_BYTE) +
6715                 (le16_to_cpu(firmware_features->num_elements) * 2);
6716
6717         features_enabled_iomem_addr = firmware_features_iomem_addr +
6718                 offsetof(struct pqi_config_table_firmware_features,
6719                         features_supported) + byte_index;
6720
6721         return *((__force u8 *)features_enabled_iomem_addr) &
6722                 (1 << (bit_position % BITS_PER_BYTE)) ? true : false;
6723 }
6724
6725 static inline void pqi_request_firmware_feature(
6726         struct pqi_config_table_firmware_features *firmware_features,
6727         unsigned int bit_position)
6728 {
6729         unsigned int byte_index;
6730
6731         byte_index = (bit_position / BITS_PER_BYTE) +
6732                 le16_to_cpu(firmware_features->num_elements);
6733
6734         firmware_features->features_supported[byte_index] |=
6735                 (1 << (bit_position % BITS_PER_BYTE));
6736 }
6737
6738 static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info,
6739         u16 first_section, u16 last_section)
6740 {
6741         struct pqi_vendor_general_request request;
6742
6743         memset(&request, 0, sizeof(request));
6744
6745         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
6746         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
6747                 &request.header.iu_length);
6748         put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE,
6749                 &request.function_code);
6750         put_unaligned_le16(first_section,
6751                 &request.data.config_table_update.first_section);
6752         put_unaligned_le16(last_section,
6753                 &request.data.config_table_update.last_section);
6754
6755         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
6756                 0, NULL, NO_TIMEOUT);
6757 }
6758
6759 static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
6760         struct pqi_config_table_firmware_features *firmware_features,
6761         void __iomem *firmware_features_iomem_addr)
6762 {
6763         void *features_requested;
6764         void __iomem *features_requested_iomem_addr;
6765
6766         features_requested = firmware_features->features_supported +
6767                 le16_to_cpu(firmware_features->num_elements);
6768
6769         features_requested_iomem_addr = firmware_features_iomem_addr +
6770                 (features_requested - (void *)firmware_features);
6771
6772         memcpy_toio(features_requested_iomem_addr, features_requested,
6773                 le16_to_cpu(firmware_features->num_elements));
6774
6775         return pqi_config_table_update(ctrl_info,
6776                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES,
6777                 PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES);
6778 }
6779
6780 struct pqi_firmware_feature {
6781         char            *feature_name;
6782         unsigned int    feature_bit;
6783         bool            supported;
6784         bool            enabled;
6785         void (*feature_status)(struct pqi_ctrl_info *ctrl_info,
6786                 struct pqi_firmware_feature *firmware_feature);
6787 };
6788
6789 static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info,
6790         struct pqi_firmware_feature *firmware_feature)
6791 {
6792         if (!firmware_feature->supported) {
6793                 dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n",
6794                         firmware_feature->feature_name);
6795                 return;
6796         }
6797
6798         if (firmware_feature->enabled) {
6799                 dev_info(&ctrl_info->pci_dev->dev,
6800                         "%s enabled\n", firmware_feature->feature_name);
6801                 return;
6802         }
6803
6804         dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n",
6805                 firmware_feature->feature_name);
6806 }
6807
6808 static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info,
6809         struct pqi_firmware_feature *firmware_feature)
6810 {
6811         if (firmware_feature->feature_status)
6812                 firmware_feature->feature_status(ctrl_info, firmware_feature);
6813 }
6814
6815 static DEFINE_MUTEX(pqi_firmware_features_mutex);
6816
6817 static struct pqi_firmware_feature pqi_firmware_features[] = {
6818         {
6819                 .feature_name = "Online Firmware Activation",
6820                 .feature_bit = PQI_FIRMWARE_FEATURE_OFA,
6821                 .feature_status = pqi_firmware_feature_status,
6822         },
6823         {
6824                 .feature_name = "Serial Management Protocol",
6825                 .feature_bit = PQI_FIRMWARE_FEATURE_SMP,
6826                 .feature_status = pqi_firmware_feature_status,
6827         },
6828         {
6829                 .feature_name = "New Soft Reset Handshake",
6830                 .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE,
6831                 .feature_status = pqi_firmware_feature_status,
6832         },
6833 };
6834
6835 static void pqi_process_firmware_features(
6836         struct pqi_config_table_section_info *section_info)
6837 {
6838         int rc;
6839         struct pqi_ctrl_info *ctrl_info;
6840         struct pqi_config_table_firmware_features *firmware_features;
6841         void __iomem *firmware_features_iomem_addr;
6842         unsigned int i;
6843         unsigned int num_features_supported;
6844
6845         ctrl_info = section_info->ctrl_info;
6846         firmware_features = section_info->section;
6847         firmware_features_iomem_addr = section_info->section_iomem_addr;
6848
6849         for (i = 0, num_features_supported = 0;
6850                 i < ARRAY_SIZE(pqi_firmware_features); i++) {
6851                 if (pqi_is_firmware_feature_supported(firmware_features,
6852                         pqi_firmware_features[i].feature_bit)) {
6853                         pqi_firmware_features[i].supported = true;
6854                         num_features_supported++;
6855                 } else {
6856                         pqi_firmware_feature_update(ctrl_info,
6857                                 &pqi_firmware_features[i]);
6858                 }
6859         }
6860
6861         if (num_features_supported == 0)
6862                 return;
6863
6864         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6865                 if (!pqi_firmware_features[i].supported)
6866                         continue;
6867                 pqi_request_firmware_feature(firmware_features,
6868                         pqi_firmware_features[i].feature_bit);
6869         }
6870
6871         rc = pqi_enable_firmware_features(ctrl_info, firmware_features,
6872                 firmware_features_iomem_addr);
6873         if (rc) {
6874                 dev_err(&ctrl_info->pci_dev->dev,
6875                         "failed to enable firmware features in PQI configuration table\n");
6876                 for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6877                         if (!pqi_firmware_features[i].supported)
6878                                 continue;
6879                         pqi_firmware_feature_update(ctrl_info,
6880                                 &pqi_firmware_features[i]);
6881                 }
6882                 return;
6883         }
6884
6885         ctrl_info->soft_reset_handshake_supported = false;
6886         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6887                 if (!pqi_firmware_features[i].supported)
6888                         continue;
6889                 if (pqi_is_firmware_feature_enabled(firmware_features,
6890                         firmware_features_iomem_addr,
6891                         pqi_firmware_features[i].feature_bit)) {
6892                         pqi_firmware_features[i].enabled = true;
6893                         if (pqi_firmware_features[i].feature_bit ==
6894                             PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE)
6895                                 ctrl_info->soft_reset_handshake_supported =
6896                                                                         true;
6897                 }
6898                 pqi_firmware_feature_update(ctrl_info,
6899                         &pqi_firmware_features[i]);
6900         }
6901 }
6902
6903 static void pqi_init_firmware_features(void)
6904 {
6905         unsigned int i;
6906
6907         for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) {
6908                 pqi_firmware_features[i].supported = false;
6909                 pqi_firmware_features[i].enabled = false;
6910         }
6911 }
6912
6913 static void pqi_process_firmware_features_section(
6914         struct pqi_config_table_section_info *section_info)
6915 {
6916         mutex_lock(&pqi_firmware_features_mutex);
6917         pqi_init_firmware_features();
6918         pqi_process_firmware_features(section_info);
6919         mutex_unlock(&pqi_firmware_features_mutex);
6920 }
6921
6922 static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info)
6923 {
6924         u32 table_length;
6925         u32 section_offset;
6926         void __iomem *table_iomem_addr;
6927         struct pqi_config_table *config_table;
6928         struct pqi_config_table_section_header *section;
6929         struct pqi_config_table_section_info section_info;
6930
6931         table_length = ctrl_info->config_table_length;
6932         if (table_length == 0)
6933                 return 0;
6934
6935         config_table = kmalloc(table_length, GFP_KERNEL);
6936         if (!config_table) {
6937                 dev_err(&ctrl_info->pci_dev->dev,
6938                         "failed to allocate memory for PQI configuration table\n");
6939                 return -ENOMEM;
6940         }
6941
6942         /*
6943          * Copy the config table contents from I/O memory space into the
6944          * temporary buffer.
6945          */
6946         table_iomem_addr = ctrl_info->iomem_base +
6947                 ctrl_info->config_table_offset;
6948         memcpy_fromio(config_table, table_iomem_addr, table_length);
6949
6950         section_info.ctrl_info = ctrl_info;
6951         section_offset =
6952                 get_unaligned_le32(&config_table->first_section_offset);
6953
6954         while (section_offset) {
6955                 section = (void *)config_table + section_offset;
6956
6957                 section_info.section = section;
6958                 section_info.section_offset = section_offset;
6959                 section_info.section_iomem_addr =
6960                         table_iomem_addr + section_offset;
6961
6962                 switch (get_unaligned_le16(&section->section_id)) {
6963                 case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES:
6964                         pqi_process_firmware_features_section(&section_info);
6965                         break;
6966                 case PQI_CONFIG_TABLE_SECTION_HEARTBEAT:
6967                         if (pqi_disable_heartbeat)
6968                                 dev_warn(&ctrl_info->pci_dev->dev,
6969                                 "heartbeat disabled by module parameter\n");
6970                         else
6971                                 ctrl_info->heartbeat_counter =
6972                                         table_iomem_addr +
6973                                         section_offset +
6974                                         offsetof(
6975                                         struct pqi_config_table_heartbeat,
6976                                                 heartbeat_counter);
6977                         break;
6978                 case PQI_CONFIG_TABLE_SECTION_SOFT_RESET:
6979                         ctrl_info->soft_reset_status =
6980                                 table_iomem_addr +
6981                                 section_offset +
6982                                 offsetof(struct pqi_config_table_soft_reset,
6983                                                 soft_reset_status);
6984                         break;
6985                 }
6986
6987                 section_offset =
6988                         get_unaligned_le16(&section->next_section_offset);
6989         }
6990
6991         kfree(config_table);
6992
6993         return 0;
6994 }
6995
6996 /* Switches the controller from PQI mode back into SIS mode. */
6997
6998 static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info)
6999 {
7000         int rc;
7001
7002         pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE);
7003         rc = pqi_reset(ctrl_info);
7004         if (rc)
7005                 return rc;
7006         rc = sis_reenable_sis_mode(ctrl_info);
7007         if (rc) {
7008                 dev_err(&ctrl_info->pci_dev->dev,
7009                         "re-enabling SIS mode failed with error %d\n", rc);
7010                 return rc;
7011         }
7012         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7013
7014         return 0;
7015 }
7016
7017 /*
7018  * If the controller isn't already in SIS mode, this function forces it into
7019  * SIS mode.
7020  */
7021
7022 static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info)
7023 {
7024         if (!sis_is_firmware_running(ctrl_info))
7025                 return -ENXIO;
7026
7027         if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE)
7028                 return 0;
7029
7030         if (sis_is_kernel_up(ctrl_info)) {
7031                 pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7032                 return 0;
7033         }
7034
7035         return pqi_revert_to_sis_mode(ctrl_info);
7036 }
7037
7038 #define PQI_POST_RESET_DELAY_B4_MSGU_READY      5000
7039
7040 static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
7041 {
7042         int rc;
7043
7044         if (reset_devices) {
7045                 sis_soft_reset(ctrl_info);
7046                 msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7047         } else {
7048                 rc = pqi_force_sis_mode(ctrl_info);
7049                 if (rc)
7050                         return rc;
7051         }
7052
7053         /*
7054          * Wait until the controller is ready to start accepting SIS
7055          * commands.
7056          */
7057         rc = sis_wait_for_ctrl_ready(ctrl_info);
7058         if (rc)
7059                 return rc;
7060
7061         /*
7062          * Get the controller properties.  This allows us to determine
7063          * whether or not it supports PQI mode.
7064          */
7065         rc = sis_get_ctrl_properties(ctrl_info);
7066         if (rc) {
7067                 dev_err(&ctrl_info->pci_dev->dev,
7068                         "error obtaining controller properties\n");
7069                 return rc;
7070         }
7071
7072         rc = sis_get_pqi_capabilities(ctrl_info);
7073         if (rc) {
7074                 dev_err(&ctrl_info->pci_dev->dev,
7075                         "error obtaining controller capabilities\n");
7076                 return rc;
7077         }
7078
7079         if (reset_devices) {
7080                 if (ctrl_info->max_outstanding_requests >
7081                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP)
7082                         ctrl_info->max_outstanding_requests =
7083                                         PQI_MAX_OUTSTANDING_REQUESTS_KDUMP;
7084         } else {
7085                 if (ctrl_info->max_outstanding_requests >
7086                         PQI_MAX_OUTSTANDING_REQUESTS)
7087                         ctrl_info->max_outstanding_requests =
7088                                         PQI_MAX_OUTSTANDING_REQUESTS;
7089         }
7090
7091         pqi_calculate_io_resources(ctrl_info);
7092
7093         rc = pqi_alloc_error_buffer(ctrl_info);
7094         if (rc) {
7095                 dev_err(&ctrl_info->pci_dev->dev,
7096                         "failed to allocate PQI error buffer\n");
7097                 return rc;
7098         }
7099
7100         /*
7101          * If the function we are about to call succeeds, the
7102          * controller will transition from legacy SIS mode
7103          * into PQI mode.
7104          */
7105         rc = sis_init_base_struct_addr(ctrl_info);
7106         if (rc) {
7107                 dev_err(&ctrl_info->pci_dev->dev,
7108                         "error initializing PQI mode\n");
7109                 return rc;
7110         }
7111
7112         /* Wait for the controller to complete the SIS -> PQI transition. */
7113         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7114         if (rc) {
7115                 dev_err(&ctrl_info->pci_dev->dev,
7116                         "transition to PQI mode failed\n");
7117                 return rc;
7118         }
7119
7120         /* From here on, we are running in PQI mode. */
7121         ctrl_info->pqi_mode_enabled = true;
7122         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7123
7124         rc = pqi_alloc_admin_queues(ctrl_info);
7125         if (rc) {
7126                 dev_err(&ctrl_info->pci_dev->dev,
7127                         "failed to allocate admin queues\n");
7128                 return rc;
7129         }
7130
7131         rc = pqi_create_admin_queues(ctrl_info);
7132         if (rc) {
7133                 dev_err(&ctrl_info->pci_dev->dev,
7134                         "error creating admin queues\n");
7135                 return rc;
7136         }
7137
7138         rc = pqi_report_device_capability(ctrl_info);
7139         if (rc) {
7140                 dev_err(&ctrl_info->pci_dev->dev,
7141                         "obtaining device capability failed\n");
7142                 return rc;
7143         }
7144
7145         rc = pqi_validate_device_capability(ctrl_info);
7146         if (rc)
7147                 return rc;
7148
7149         pqi_calculate_queue_resources(ctrl_info);
7150
7151         rc = pqi_enable_msix_interrupts(ctrl_info);
7152         if (rc)
7153                 return rc;
7154
7155         if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) {
7156                 ctrl_info->max_msix_vectors =
7157                         ctrl_info->num_msix_vectors_enabled;
7158                 pqi_calculate_queue_resources(ctrl_info);
7159         }
7160
7161         rc = pqi_alloc_io_resources(ctrl_info);
7162         if (rc)
7163                 return rc;
7164
7165         rc = pqi_alloc_operational_queues(ctrl_info);
7166         if (rc) {
7167                 dev_err(&ctrl_info->pci_dev->dev,
7168                         "failed to allocate operational queues\n");
7169                 return rc;
7170         }
7171
7172         pqi_init_operational_queues(ctrl_info);
7173
7174         rc = pqi_request_irqs(ctrl_info);
7175         if (rc)
7176                 return rc;
7177
7178         rc = pqi_create_queues(ctrl_info);
7179         if (rc)
7180                 return rc;
7181
7182         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7183
7184         ctrl_info->controller_online = true;
7185
7186         rc = pqi_process_config_table(ctrl_info);
7187         if (rc)
7188                 return rc;
7189
7190         pqi_start_heartbeat_timer(ctrl_info);
7191
7192         rc = pqi_enable_events(ctrl_info);
7193         if (rc) {
7194                 dev_err(&ctrl_info->pci_dev->dev,
7195                         "error enabling events\n");
7196                 return rc;
7197         }
7198
7199         /* Register with the SCSI subsystem. */
7200         rc = pqi_register_scsi(ctrl_info);
7201         if (rc)
7202                 return rc;
7203
7204         rc = pqi_get_ctrl_product_details(ctrl_info);
7205         if (rc) {
7206                 dev_err(&ctrl_info->pci_dev->dev,
7207                         "error obtaining product details\n");
7208                 return rc;
7209         }
7210
7211         rc = pqi_get_ctrl_serial_number(ctrl_info);
7212         if (rc) {
7213                 dev_err(&ctrl_info->pci_dev->dev,
7214                         "error obtaining ctrl serial number\n");
7215                 return rc;
7216         }
7217
7218         rc = pqi_set_diag_rescan(ctrl_info);
7219         if (rc) {
7220                 dev_err(&ctrl_info->pci_dev->dev,
7221                         "error enabling multi-lun rescan\n");
7222                 return rc;
7223         }
7224
7225         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7226         if (rc) {
7227                 dev_err(&ctrl_info->pci_dev->dev,
7228                         "error updating host wellness\n");
7229                 return rc;
7230         }
7231
7232         pqi_schedule_update_time_worker(ctrl_info);
7233
7234         pqi_scan_scsi_devices(ctrl_info);
7235
7236         return 0;
7237 }
7238
7239 static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info)
7240 {
7241         unsigned int i;
7242         struct pqi_admin_queues *admin_queues;
7243         struct pqi_event_queue *event_queue;
7244
7245         admin_queues = &ctrl_info->admin_queues;
7246         admin_queues->iq_pi_copy = 0;
7247         admin_queues->oq_ci_copy = 0;
7248         writel(0, admin_queues->oq_pi);
7249
7250         for (i = 0; i < ctrl_info->num_queue_groups; i++) {
7251                 ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0;
7252                 ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0;
7253                 ctrl_info->queue_groups[i].oq_ci_copy = 0;
7254
7255                 writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]);
7256                 writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]);
7257                 writel(0, ctrl_info->queue_groups[i].oq_pi);
7258         }
7259
7260         event_queue = &ctrl_info->event_queue;
7261         writel(0, event_queue->oq_pi);
7262         event_queue->oq_ci_copy = 0;
7263 }
7264
7265 static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info)
7266 {
7267         int rc;
7268
7269         rc = pqi_force_sis_mode(ctrl_info);
7270         if (rc)
7271                 return rc;
7272
7273         /*
7274          * Wait until the controller is ready to start accepting SIS
7275          * commands.
7276          */
7277         rc = sis_wait_for_ctrl_ready_resume(ctrl_info);
7278         if (rc)
7279                 return rc;
7280
7281         /*
7282          * Get the controller properties.  This allows us to determine
7283          * whether or not it supports PQI mode.
7284          */
7285         rc = sis_get_ctrl_properties(ctrl_info);
7286         if (rc) {
7287                 dev_err(&ctrl_info->pci_dev->dev,
7288                         "error obtaining controller properties\n");
7289                 return rc;
7290         }
7291
7292         rc = sis_get_pqi_capabilities(ctrl_info);
7293         if (rc) {
7294                 dev_err(&ctrl_info->pci_dev->dev,
7295                         "error obtaining controller capabilities\n");
7296                 return rc;
7297         }
7298
7299         /*
7300          * If the function we are about to call succeeds, the
7301          * controller will transition from legacy SIS mode
7302          * into PQI mode.
7303          */
7304         rc = sis_init_base_struct_addr(ctrl_info);
7305         if (rc) {
7306                 dev_err(&ctrl_info->pci_dev->dev,
7307                         "error initializing PQI mode\n");
7308                 return rc;
7309         }
7310
7311         /* Wait for the controller to complete the SIS -> PQI transition. */
7312         rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
7313         if (rc) {
7314                 dev_err(&ctrl_info->pci_dev->dev,
7315                         "transition to PQI mode failed\n");
7316                 return rc;
7317         }
7318
7319         /* From here on, we are running in PQI mode. */
7320         ctrl_info->pqi_mode_enabled = true;
7321         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7322
7323         pqi_reinit_queues(ctrl_info);
7324
7325         rc = pqi_create_admin_queues(ctrl_info);
7326         if (rc) {
7327                 dev_err(&ctrl_info->pci_dev->dev,
7328                         "error creating admin queues\n");
7329                 return rc;
7330         }
7331
7332         rc = pqi_create_queues(ctrl_info);
7333         if (rc)
7334                 return rc;
7335
7336         pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX);
7337
7338         ctrl_info->controller_online = true;
7339         pqi_ctrl_unblock_requests(ctrl_info);
7340
7341         rc = pqi_process_config_table(ctrl_info);
7342         if (rc)
7343                 return rc;
7344
7345         pqi_start_heartbeat_timer(ctrl_info);
7346
7347         rc = pqi_enable_events(ctrl_info);
7348         if (rc) {
7349                 dev_err(&ctrl_info->pci_dev->dev,
7350                         "error enabling events\n");
7351                 return rc;
7352         }
7353
7354         rc = pqi_get_ctrl_product_details(ctrl_info);
7355         if (rc) {
7356                 dev_err(&ctrl_info->pci_dev->dev,
7357                         "error obtaining product detail\n");
7358                 return rc;
7359         }
7360
7361         rc = pqi_set_diag_rescan(ctrl_info);
7362         if (rc) {
7363                 dev_err(&ctrl_info->pci_dev->dev,
7364                         "error enabling multi-lun rescan\n");
7365                 return rc;
7366         }
7367
7368         rc = pqi_write_driver_version_to_host_wellness(ctrl_info);
7369         if (rc) {
7370                 dev_err(&ctrl_info->pci_dev->dev,
7371                         "error updating host wellness\n");
7372                 return rc;
7373         }
7374
7375         pqi_schedule_update_time_worker(ctrl_info);
7376
7377         pqi_scan_scsi_devices(ctrl_info);
7378
7379         return 0;
7380 }
7381
7382 static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev,
7383         u16 timeout)
7384 {
7385         return pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2,
7386                 PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout);
7387 }
7388
7389 static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info)
7390 {
7391         int rc;
7392         u64 mask;
7393
7394         rc = pci_enable_device(ctrl_info->pci_dev);
7395         if (rc) {
7396                 dev_err(&ctrl_info->pci_dev->dev,
7397                         "failed to enable PCI device\n");
7398                 return rc;
7399         }
7400
7401         if (sizeof(dma_addr_t) > 4)
7402                 mask = DMA_BIT_MASK(64);
7403         else
7404                 mask = DMA_BIT_MASK(32);
7405
7406         rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask);
7407         if (rc) {
7408                 dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n");
7409                 goto disable_device;
7410         }
7411
7412         rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT);
7413         if (rc) {
7414                 dev_err(&ctrl_info->pci_dev->dev,
7415                         "failed to obtain PCI resources\n");
7416                 goto disable_device;
7417         }
7418
7419         ctrl_info->iomem_base = ioremap_nocache(pci_resource_start(
7420                 ctrl_info->pci_dev, 0),
7421                 sizeof(struct pqi_ctrl_registers));
7422         if (!ctrl_info->iomem_base) {
7423                 dev_err(&ctrl_info->pci_dev->dev,
7424                         "failed to map memory for controller registers\n");
7425                 rc = -ENOMEM;
7426                 goto release_regions;
7427         }
7428
7429 #define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS               0x6
7430
7431         /* Increase the PCIe completion timeout. */
7432         rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev,
7433                 PCI_EXP_COMP_TIMEOUT_65_TO_210_MS);
7434         if (rc) {
7435                 dev_err(&ctrl_info->pci_dev->dev,
7436                         "failed to set PCIe completion timeout\n");
7437                 goto release_regions;
7438         }
7439
7440         /* Enable bus mastering. */
7441         pci_set_master(ctrl_info->pci_dev);
7442
7443         ctrl_info->registers = ctrl_info->iomem_base;
7444         ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
7445
7446         pci_set_drvdata(ctrl_info->pci_dev, ctrl_info);
7447
7448         return 0;
7449
7450 release_regions:
7451         pci_release_regions(ctrl_info->pci_dev);
7452 disable_device:
7453         pci_disable_device(ctrl_info->pci_dev);
7454
7455         return rc;
7456 }
7457
7458 static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info)
7459 {
7460         iounmap(ctrl_info->iomem_base);
7461         pci_release_regions(ctrl_info->pci_dev);
7462         if (pci_is_enabled(ctrl_info->pci_dev))
7463                 pci_disable_device(ctrl_info->pci_dev);
7464         pci_set_drvdata(ctrl_info->pci_dev, NULL);
7465 }
7466
7467 static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node)
7468 {
7469         struct pqi_ctrl_info *ctrl_info;
7470
7471         ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info),
7472                         GFP_KERNEL, numa_node);
7473         if (!ctrl_info)
7474                 return NULL;
7475
7476         mutex_init(&ctrl_info->scan_mutex);
7477         mutex_init(&ctrl_info->lun_reset_mutex);
7478         mutex_init(&ctrl_info->ofa_mutex);
7479
7480         INIT_LIST_HEAD(&ctrl_info->scsi_device_list);
7481         spin_lock_init(&ctrl_info->scsi_device_list_lock);
7482
7483         INIT_WORK(&ctrl_info->event_work, pqi_event_worker);
7484         atomic_set(&ctrl_info->num_interrupts, 0);
7485         atomic_set(&ctrl_info->sync_cmds_outstanding, 0);
7486
7487         INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
7488         INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
7489
7490         timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0);
7491         INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker);
7492
7493         sema_init(&ctrl_info->sync_request_sem,
7494                 PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
7495         init_waitqueue_head(&ctrl_info->block_requests_wait);
7496
7497         INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list);
7498         spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock);
7499         INIT_WORK(&ctrl_info->raid_bypass_retry_work,
7500                 pqi_raid_bypass_retry_worker);
7501
7502         ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
7503         ctrl_info->irq_mode = IRQ_MODE_NONE;
7504         ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS;
7505
7506         return ctrl_info;
7507 }
7508
7509 static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info)
7510 {
7511         kfree(ctrl_info);
7512 }
7513
7514 static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info)
7515 {
7516         pqi_free_irqs(ctrl_info);
7517         pqi_disable_msix_interrupts(ctrl_info);
7518 }
7519
7520 static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info)
7521 {
7522         pqi_stop_heartbeat_timer(ctrl_info);
7523         pqi_free_interrupts(ctrl_info);
7524         if (ctrl_info->queue_memory_base)
7525                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7526                         ctrl_info->queue_memory_length,
7527                         ctrl_info->queue_memory_base,
7528                         ctrl_info->queue_memory_base_dma_handle);
7529         if (ctrl_info->admin_queue_memory_base)
7530                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7531                         ctrl_info->admin_queue_memory_length,
7532                         ctrl_info->admin_queue_memory_base,
7533                         ctrl_info->admin_queue_memory_base_dma_handle);
7534         pqi_free_all_io_requests(ctrl_info);
7535         if (ctrl_info->error_buffer)
7536                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7537                         ctrl_info->error_buffer_length,
7538                         ctrl_info->error_buffer,
7539                         ctrl_info->error_buffer_dma_handle);
7540         if (ctrl_info->iomem_base)
7541                 pqi_cleanup_pci_init(ctrl_info);
7542         pqi_free_ctrl_info(ctrl_info);
7543 }
7544
7545 static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info)
7546 {
7547         pqi_cancel_rescan_worker(ctrl_info);
7548         pqi_cancel_update_time_worker(ctrl_info);
7549         pqi_remove_all_scsi_devices(ctrl_info);
7550         pqi_unregister_scsi(ctrl_info);
7551         if (ctrl_info->pqi_mode_enabled)
7552                 pqi_revert_to_sis_mode(ctrl_info);
7553         pqi_free_ctrl_resources(ctrl_info);
7554 }
7555
7556 static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info)
7557 {
7558         pqi_cancel_update_time_worker(ctrl_info);
7559         pqi_cancel_rescan_worker(ctrl_info);
7560         pqi_wait_until_lun_reset_finished(ctrl_info);
7561         pqi_wait_until_scan_finished(ctrl_info);
7562         pqi_ctrl_ofa_start(ctrl_info);
7563         pqi_ctrl_block_requests(ctrl_info);
7564         pqi_ctrl_wait_until_quiesced(ctrl_info);
7565         pqi_ctrl_wait_for_pending_io(ctrl_info, PQI_PENDING_IO_TIMEOUT_SECS);
7566         pqi_fail_io_queued_for_all_devices(ctrl_info);
7567         pqi_wait_until_inbound_queues_empty(ctrl_info);
7568         pqi_stop_heartbeat_timer(ctrl_info);
7569         ctrl_info->pqi_mode_enabled = false;
7570         pqi_save_ctrl_mode(ctrl_info, SIS_MODE);
7571 }
7572
7573 static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info)
7574 {
7575         pqi_ofa_free_host_buffer(ctrl_info);
7576         ctrl_info->pqi_mode_enabled = true;
7577         pqi_save_ctrl_mode(ctrl_info, PQI_MODE);
7578         ctrl_info->controller_online = true;
7579         pqi_ctrl_unblock_requests(ctrl_info);
7580         pqi_start_heartbeat_timer(ctrl_info);
7581         pqi_schedule_update_time_worker(ctrl_info);
7582         pqi_clear_soft_reset_status(ctrl_info,
7583                 PQI_SOFT_RESET_ABORT);
7584         pqi_scan_scsi_devices(ctrl_info);
7585 }
7586
7587 static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info,
7588         u32 total_size, u32 chunk_size)
7589 {
7590         u32 sg_count;
7591         u32 size;
7592         int i;
7593         struct pqi_sg_descriptor *mem_descriptor = NULL;
7594         struct device *dev;
7595         struct pqi_ofa_memory *ofap;
7596
7597         dev = &ctrl_info->pci_dev->dev;
7598
7599         sg_count = (total_size + chunk_size - 1);
7600         sg_count /= chunk_size;
7601
7602         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7603
7604         if (sg_count*chunk_size < total_size)
7605                 goto out;
7606
7607         ctrl_info->pqi_ofa_chunk_virt_addr =
7608                                 kcalloc(sg_count, sizeof(void *), GFP_KERNEL);
7609         if (!ctrl_info->pqi_ofa_chunk_virt_addr)
7610                 goto out;
7611
7612         for (size = 0, i = 0; size < total_size; size += chunk_size, i++) {
7613                 dma_addr_t dma_handle;
7614
7615                 ctrl_info->pqi_ofa_chunk_virt_addr[i] =
7616                         dma_alloc_coherent(dev, chunk_size, &dma_handle,
7617                                            GFP_KERNEL);
7618
7619                 if (!ctrl_info->pqi_ofa_chunk_virt_addr[i])
7620                         break;
7621
7622                 mem_descriptor = &ofap->sg_descriptor[i];
7623                 put_unaligned_le64 ((u64) dma_handle, &mem_descriptor->address);
7624                 put_unaligned_le32 (chunk_size, &mem_descriptor->length);
7625         }
7626
7627         if (!size || size < total_size)
7628                 goto out_free_chunks;
7629
7630         put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags);
7631         put_unaligned_le16(sg_count, &ofap->num_memory_descriptors);
7632         put_unaligned_le32(size, &ofap->bytes_allocated);
7633
7634         return 0;
7635
7636 out_free_chunks:
7637         while (--i >= 0) {
7638                 mem_descriptor = &ofap->sg_descriptor[i];
7639                 dma_free_coherent(dev, chunk_size,
7640                                 ctrl_info->pqi_ofa_chunk_virt_addr[i],
7641                                 get_unaligned_le64(&mem_descriptor->address));
7642         }
7643         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7644
7645 out:
7646         put_unaligned_le32 (0, &ofap->bytes_allocated);
7647         return -ENOMEM;
7648 }
7649
7650 static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info)
7651 {
7652         u32 total_size;
7653         u32 min_chunk_size;
7654         u32 chunk_sz;
7655
7656         total_size = le32_to_cpu(
7657                         ctrl_info->pqi_ofa_mem_virt_addr->bytes_allocated);
7658         min_chunk_size = total_size / PQI_OFA_MAX_SG_DESCRIPTORS;
7659
7660         for (chunk_sz = total_size; chunk_sz >= min_chunk_size; chunk_sz /= 2)
7661                 if (!pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_sz))
7662                         return 0;
7663
7664         return -ENOMEM;
7665 }
7666
7667 static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info,
7668         u32 bytes_requested)
7669 {
7670         struct pqi_ofa_memory *pqi_ofa_memory;
7671         struct device *dev;
7672
7673         dev = &ctrl_info->pci_dev->dev;
7674         pqi_ofa_memory = dma_alloc_coherent(dev,
7675                                             PQI_OFA_MEMORY_DESCRIPTOR_LENGTH,
7676                                             &ctrl_info->pqi_ofa_mem_dma_handle,
7677                                             GFP_KERNEL);
7678
7679         if (!pqi_ofa_memory)
7680                 return;
7681
7682         put_unaligned_le16(PQI_OFA_VERSION, &pqi_ofa_memory->version);
7683         memcpy(&pqi_ofa_memory->signature, PQI_OFA_SIGNATURE,
7684                                         sizeof(pqi_ofa_memory->signature));
7685         pqi_ofa_memory->bytes_allocated = cpu_to_le32(bytes_requested);
7686
7687         ctrl_info->pqi_ofa_mem_virt_addr = pqi_ofa_memory;
7688
7689         if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) {
7690                 dev_err(dev, "Failed to allocate host buffer of size = %u",
7691                         bytes_requested);
7692         }
7693 }
7694
7695 static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info)
7696 {
7697         int i;
7698         struct pqi_sg_descriptor *mem_descriptor;
7699         struct pqi_ofa_memory *ofap;
7700
7701         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7702
7703         if (!ofap)
7704                 return;
7705
7706         if (!ofap->bytes_allocated)
7707                 goto out;
7708
7709         mem_descriptor = ofap->sg_descriptor;
7710
7711         for (i = 0; i < get_unaligned_le16(&ofap->num_memory_descriptors);
7712                 i++) {
7713                 dma_free_coherent(&ctrl_info->pci_dev->dev,
7714                         get_unaligned_le32(&mem_descriptor[i].length),
7715                         ctrl_info->pqi_ofa_chunk_virt_addr[i],
7716                         get_unaligned_le64(&mem_descriptor[i].address));
7717         }
7718         kfree(ctrl_info->pqi_ofa_chunk_virt_addr);
7719
7720 out:
7721         dma_free_coherent(&ctrl_info->pci_dev->dev,
7722                         PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, ofap,
7723                         ctrl_info->pqi_ofa_mem_dma_handle);
7724         ctrl_info->pqi_ofa_mem_virt_addr = NULL;
7725 }
7726
7727 static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info)
7728 {
7729         struct pqi_vendor_general_request request;
7730         size_t size;
7731         struct pqi_ofa_memory *ofap;
7732
7733         memset(&request, 0, sizeof(request));
7734
7735         ofap = ctrl_info->pqi_ofa_mem_virt_addr;
7736
7737         request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL;
7738         put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH,
7739                 &request.header.iu_length);
7740         put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE,
7741                 &request.function_code);
7742
7743         if (ofap) {
7744                 size = offsetof(struct pqi_ofa_memory, sg_descriptor) +
7745                         get_unaligned_le16(&ofap->num_memory_descriptors) *
7746                         sizeof(struct pqi_sg_descriptor);
7747
7748                 put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle,
7749                         &request.data.ofa_memory_allocation.buffer_address);
7750                 put_unaligned_le32(size,
7751                         &request.data.ofa_memory_allocation.buffer_length);
7752
7753         }
7754
7755         return pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
7756                 0, NULL, NO_TIMEOUT);
7757 }
7758
7759 static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info)
7760 {
7761         msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY);
7762         return pqi_ctrl_init_resume(ctrl_info);
7763 }
7764
7765 static void pqi_perform_lockup_action(void)
7766 {
7767         switch (pqi_lockup_action) {
7768         case PANIC:
7769                 panic("FATAL: Smart Family Controller lockup detected");
7770                 break;
7771         case REBOOT:
7772                 emergency_restart();
7773                 break;
7774         case NONE:
7775         default:
7776                 break;
7777         }
7778 }
7779
7780 static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = {
7781         .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR,
7782         .status = SAM_STAT_CHECK_CONDITION,
7783 };
7784
7785 static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info)
7786 {
7787         unsigned int i;
7788         struct pqi_io_request *io_request;
7789         struct scsi_cmnd *scmd;
7790
7791         for (i = 0; i < ctrl_info->max_io_slots; i++) {
7792                 io_request = &ctrl_info->io_request_pool[i];
7793                 if (atomic_read(&io_request->refcount) == 0)
7794                         continue;
7795
7796                 scmd = io_request->scmd;
7797                 if (scmd) {
7798                         set_host_byte(scmd, DID_NO_CONNECT);
7799                 } else {
7800                         io_request->status = -ENXIO;
7801                         io_request->error_info =
7802                                 &pqi_ctrl_offline_raid_error_info;
7803                 }
7804
7805                 io_request->io_complete_callback(io_request,
7806                         io_request->context);
7807         }
7808 }
7809
7810 static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info)
7811 {
7812         pqi_perform_lockup_action();
7813         pqi_stop_heartbeat_timer(ctrl_info);
7814         pqi_free_interrupts(ctrl_info);
7815         pqi_cancel_rescan_worker(ctrl_info);
7816         pqi_cancel_update_time_worker(ctrl_info);
7817         pqi_ctrl_wait_until_quiesced(ctrl_info);
7818         pqi_fail_all_outstanding_requests(ctrl_info);
7819         pqi_clear_all_queued_raid_bypass_retries(ctrl_info);
7820         pqi_ctrl_unblock_requests(ctrl_info);
7821 }
7822
7823 static void pqi_ctrl_offline_worker(struct work_struct *work)
7824 {
7825         struct pqi_ctrl_info *ctrl_info;
7826
7827         ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work);
7828         pqi_take_ctrl_offline_deferred(ctrl_info);
7829 }
7830
7831 static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info)
7832 {
7833         if (!ctrl_info->controller_online)
7834                 return;
7835
7836         ctrl_info->controller_online = false;
7837         ctrl_info->pqi_mode_enabled = false;
7838         pqi_ctrl_block_requests(ctrl_info);
7839         if (!pqi_disable_ctrl_shutdown)
7840                 sis_shutdown_ctrl(ctrl_info);
7841         pci_disable_device(ctrl_info->pci_dev);
7842         dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
7843         schedule_work(&ctrl_info->ctrl_offline_work);
7844 }
7845
7846 static void pqi_print_ctrl_info(struct pci_dev *pci_dev,
7847         const struct pci_device_id *id)
7848 {
7849         char *ctrl_description;
7850
7851         if (id->driver_data)
7852                 ctrl_description = (char *)id->driver_data;
7853         else
7854                 ctrl_description = "Microsemi Smart Family Controller";
7855
7856         dev_info(&pci_dev->dev, "%s found\n", ctrl_description);
7857 }
7858
7859 static int pqi_pci_probe(struct pci_dev *pci_dev,
7860         const struct pci_device_id *id)
7861 {
7862         int rc;
7863         int node, cp_node;
7864         struct pqi_ctrl_info *ctrl_info;
7865
7866         pqi_print_ctrl_info(pci_dev, id);
7867
7868         if (pqi_disable_device_id_wildcards &&
7869                 id->subvendor == PCI_ANY_ID &&
7870                 id->subdevice == PCI_ANY_ID) {
7871                 dev_warn(&pci_dev->dev,
7872                         "controller not probed because device ID wildcards are disabled\n");
7873                 return -ENODEV;
7874         }
7875
7876         if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID)
7877                 dev_warn(&pci_dev->dev,
7878                         "controller device ID matched using wildcards\n");
7879
7880         node = dev_to_node(&pci_dev->dev);
7881         if (node == NUMA_NO_NODE) {
7882                 cp_node = cpu_to_node(0);
7883                 if (cp_node == NUMA_NO_NODE)
7884                         cp_node = 0;
7885                 set_dev_node(&pci_dev->dev, cp_node);
7886         }
7887
7888         ctrl_info = pqi_alloc_ctrl_info(node);
7889         if (!ctrl_info) {
7890                 dev_err(&pci_dev->dev,
7891                         "failed to allocate controller info block\n");
7892                 return -ENOMEM;
7893         }
7894
7895         ctrl_info->pci_dev = pci_dev;
7896
7897         rc = pqi_pci_init(ctrl_info);
7898         if (rc)
7899                 goto error;
7900
7901         rc = pqi_ctrl_init(ctrl_info);
7902         if (rc)
7903                 goto error;
7904
7905         return 0;
7906
7907 error:
7908         pqi_remove_ctrl(ctrl_info);
7909
7910         return rc;
7911 }
7912
7913 static void pqi_pci_remove(struct pci_dev *pci_dev)
7914 {
7915         struct pqi_ctrl_info *ctrl_info;
7916
7917         ctrl_info = pci_get_drvdata(pci_dev);
7918         if (!ctrl_info)
7919                 return;
7920
7921         ctrl_info->in_shutdown = true;
7922
7923         pqi_remove_ctrl(ctrl_info);
7924 }
7925
7926 static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info)
7927 {
7928         unsigned int i;
7929         struct pqi_io_request *io_request;
7930         struct scsi_cmnd *scmd;
7931
7932         for (i = 0; i < ctrl_info->max_io_slots; i++) {
7933                 io_request = &ctrl_info->io_request_pool[i];
7934                 if (atomic_read(&io_request->refcount) == 0)
7935                         continue;
7936                 scmd = io_request->scmd;
7937                 WARN_ON(scmd != NULL); /* IO command from SML */
7938                 WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/
7939         }
7940 }
7941
7942 static void pqi_shutdown(struct pci_dev *pci_dev)
7943 {
7944         int rc;
7945         struct pqi_ctrl_info *ctrl_info;
7946
7947         ctrl_info = pci_get_drvdata(pci_dev);
7948         if (!ctrl_info) {
7949                 dev_err(&pci_dev->dev,
7950                         "cache could not be flushed\n");
7951                 return;
7952         }
7953
7954         pqi_disable_events(ctrl_info);
7955         pqi_wait_until_ofa_finished(ctrl_info);
7956         pqi_cancel_update_time_worker(ctrl_info);
7957         pqi_cancel_rescan_worker(ctrl_info);
7958         pqi_cancel_event_worker(ctrl_info);
7959
7960         pqi_ctrl_shutdown_start(ctrl_info);
7961         pqi_ctrl_wait_until_quiesced(ctrl_info);
7962
7963         rc = pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
7964         if (rc) {
7965                 dev_err(&pci_dev->dev,
7966                         "wait for pending I/O failed\n");
7967                 return;
7968         }
7969
7970         pqi_ctrl_block_device_reset(ctrl_info);
7971         pqi_wait_until_lun_reset_finished(ctrl_info);
7972
7973         /*
7974          * Write all data in the controller's battery-backed cache to
7975          * storage.
7976          */
7977         rc = pqi_flush_cache(ctrl_info, SHUTDOWN);
7978         if (rc)
7979                 dev_err(&pci_dev->dev,
7980                         "unable to flush controller cache\n");
7981
7982         pqi_ctrl_block_requests(ctrl_info);
7983
7984         rc = pqi_ctrl_wait_for_pending_sync_cmds(ctrl_info);
7985         if (rc) {
7986                 dev_err(&pci_dev->dev,
7987                         "wait for pending sync cmds failed\n");
7988                 return;
7989         }
7990
7991         pqi_crash_if_pending_command(ctrl_info);
7992         pqi_reset(ctrl_info);
7993
7994 }
7995
7996 static void pqi_process_lockup_action_param(void)
7997 {
7998         unsigned int i;
7999
8000         if (!pqi_lockup_action_param)
8001                 return;
8002
8003         for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) {
8004                 if (strcmp(pqi_lockup_action_param,
8005                         pqi_lockup_actions[i].name) == 0) {
8006                         pqi_lockup_action = pqi_lockup_actions[i].action;
8007                         return;
8008                 }
8009         }
8010
8011         pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n",
8012                 DRIVER_NAME_SHORT, pqi_lockup_action_param);
8013 }
8014
8015 static void pqi_process_module_params(void)
8016 {
8017         pqi_process_lockup_action_param();
8018 }
8019
8020 static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state)
8021 {
8022         struct pqi_ctrl_info *ctrl_info;
8023
8024         ctrl_info = pci_get_drvdata(pci_dev);
8025
8026         pqi_disable_events(ctrl_info);
8027         pqi_cancel_update_time_worker(ctrl_info);
8028         pqi_cancel_rescan_worker(ctrl_info);
8029         pqi_wait_until_scan_finished(ctrl_info);
8030         pqi_wait_until_lun_reset_finished(ctrl_info);
8031         pqi_wait_until_ofa_finished(ctrl_info);
8032         pqi_flush_cache(ctrl_info, SUSPEND);
8033         pqi_ctrl_block_requests(ctrl_info);
8034         pqi_ctrl_wait_until_quiesced(ctrl_info);
8035         pqi_wait_until_inbound_queues_empty(ctrl_info);
8036         pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT);
8037         pqi_stop_heartbeat_timer(ctrl_info);
8038
8039         if (state.event == PM_EVENT_FREEZE)
8040                 return 0;
8041
8042         pci_save_state(pci_dev);
8043         pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
8044
8045         ctrl_info->controller_online = false;
8046         ctrl_info->pqi_mode_enabled = false;
8047
8048         return 0;
8049 }
8050
8051 static __maybe_unused int pqi_resume(struct pci_dev *pci_dev)
8052 {
8053         int rc;
8054         struct pqi_ctrl_info *ctrl_info;
8055
8056         ctrl_info = pci_get_drvdata(pci_dev);
8057
8058         if (pci_dev->current_state != PCI_D0) {
8059                 ctrl_info->max_hw_queue_index = 0;
8060                 pqi_free_interrupts(ctrl_info);
8061                 pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX);
8062                 rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler,
8063                         IRQF_SHARED, DRIVER_NAME_SHORT,
8064                         &ctrl_info->queue_groups[0]);
8065                 if (rc) {
8066                         dev_err(&ctrl_info->pci_dev->dev,
8067                                 "irq %u init failed with error %d\n",
8068                                 pci_dev->irq, rc);
8069                         return rc;
8070                 }
8071                 pqi_start_heartbeat_timer(ctrl_info);
8072                 pqi_ctrl_unblock_requests(ctrl_info);
8073                 return 0;
8074         }
8075
8076         pci_set_power_state(pci_dev, PCI_D0);
8077         pci_restore_state(pci_dev);
8078
8079         return pqi_ctrl_init_resume(ctrl_info);
8080 }
8081
8082 /* Define the PCI IDs for the controllers that we support. */
8083 static const struct pci_device_id pqi_pci_id_table[] = {
8084         {
8085                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8086                                0x105b, 0x1211)
8087         },
8088         {
8089                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8090                                0x105b, 0x1321)
8091         },
8092         {
8093                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8094                                0x152d, 0x8a22)
8095         },
8096         {
8097                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8098                                0x152d, 0x8a23)
8099         },
8100         {
8101                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8102                                0x152d, 0x8a24)
8103         },
8104         {
8105                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8106                                0x152d, 0x8a36)
8107         },
8108         {
8109                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8110                                0x152d, 0x8a37)
8111         },
8112         {
8113                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8114                                0x193d, 0x1104)
8115         },
8116         {
8117                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8118                                0x193d, 0x1105)
8119         },
8120         {
8121                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8122                                0x193d, 0x1106)
8123         },
8124         {
8125                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8126                                0x193d, 0x1107)
8127         },
8128         {
8129                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8130                                0x193d, 0x8460)
8131         },
8132         {
8133                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8134                                0x193d, 0x8461)
8135         },
8136         {
8137                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8138                                0x193d, 0xc460)
8139         },
8140         {
8141                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8142                                0x193d, 0xc461)
8143         },
8144         {
8145                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8146                                0x193d, 0xf460)
8147         },
8148         {
8149                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8150                                0x193d, 0xf461)
8151         },
8152         {
8153                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8154                                0x1bd4, 0x0045)
8155         },
8156         {
8157                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8158                                0x1bd4, 0x0046)
8159         },
8160         {
8161                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8162                                0x1bd4, 0x0047)
8163         },
8164         {
8165                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8166                                0x1bd4, 0x0048)
8167         },
8168         {
8169                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8170                                0x1bd4, 0x004a)
8171         },
8172         {
8173                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8174                                0x1bd4, 0x004b)
8175         },
8176         {
8177                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8178                                0x1bd4, 0x004c)
8179         },
8180         {
8181                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8182                                0x1bd4, 0x004f)
8183         },
8184         {
8185                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8186                                0x19e5, 0xd227)
8187         },
8188         {
8189                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8190                                0x19e5, 0xd228)
8191         },
8192         {
8193                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8194                                0x19e5, 0xd229)
8195         },
8196         {
8197                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8198                                0x19e5, 0xd22a)
8199         },
8200         {
8201                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8202                                0x19e5, 0xd22b)
8203         },
8204         {
8205                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8206                                0x19e5, 0xd22c)
8207         },
8208         {
8209                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8210                                PCI_VENDOR_ID_ADAPTEC2, 0x0110)
8211         },
8212         {
8213                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8214                                PCI_VENDOR_ID_ADAPTEC2, 0x0608)
8215         },
8216         {
8217                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8218                                PCI_VENDOR_ID_ADAPTEC2, 0x0800)
8219         },
8220         {
8221                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8222                                PCI_VENDOR_ID_ADAPTEC2, 0x0801)
8223         },
8224         {
8225                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8226                                PCI_VENDOR_ID_ADAPTEC2, 0x0802)
8227         },
8228         {
8229                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8230                                PCI_VENDOR_ID_ADAPTEC2, 0x0803)
8231         },
8232         {
8233                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8234                                PCI_VENDOR_ID_ADAPTEC2, 0x0804)
8235         },
8236         {
8237                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8238                                PCI_VENDOR_ID_ADAPTEC2, 0x0805)
8239         },
8240         {
8241                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8242                                PCI_VENDOR_ID_ADAPTEC2, 0x0806)
8243         },
8244         {
8245                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8246                                PCI_VENDOR_ID_ADAPTEC2, 0x0807)
8247         },
8248         {
8249                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8250                                PCI_VENDOR_ID_ADAPTEC2, 0x0808)
8251         },
8252         {
8253                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8254                                PCI_VENDOR_ID_ADAPTEC2, 0x0809)
8255         },
8256         {
8257                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8258                                PCI_VENDOR_ID_ADAPTEC2, 0x0900)
8259         },
8260         {
8261                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8262                                PCI_VENDOR_ID_ADAPTEC2, 0x0901)
8263         },
8264         {
8265                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8266                                PCI_VENDOR_ID_ADAPTEC2, 0x0902)
8267         },
8268         {
8269                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8270                                PCI_VENDOR_ID_ADAPTEC2, 0x0903)
8271         },
8272         {
8273                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8274                                PCI_VENDOR_ID_ADAPTEC2, 0x0904)
8275         },
8276         {
8277                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8278                                PCI_VENDOR_ID_ADAPTEC2, 0x0905)
8279         },
8280         {
8281                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8282                                PCI_VENDOR_ID_ADAPTEC2, 0x0906)
8283         },
8284         {
8285                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8286                                PCI_VENDOR_ID_ADAPTEC2, 0x0907)
8287         },
8288         {
8289                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8290                                PCI_VENDOR_ID_ADAPTEC2, 0x0908)
8291         },
8292         {
8293                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8294                                PCI_VENDOR_ID_ADAPTEC2, 0x090a)
8295         },
8296         {
8297                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8298                                PCI_VENDOR_ID_ADAPTEC2, 0x1200)
8299         },
8300         {
8301                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8302                                PCI_VENDOR_ID_ADAPTEC2, 0x1201)
8303         },
8304         {
8305                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8306                                PCI_VENDOR_ID_ADAPTEC2, 0x1202)
8307         },
8308         {
8309                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8310                                PCI_VENDOR_ID_ADAPTEC2, 0x1280)
8311         },
8312         {
8313                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8314                                PCI_VENDOR_ID_ADAPTEC2, 0x1281)
8315         },
8316         {
8317                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8318                                PCI_VENDOR_ID_ADAPTEC2, 0x1282)
8319         },
8320         {
8321                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8322                                PCI_VENDOR_ID_ADAPTEC2, 0x1300)
8323         },
8324         {
8325                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8326                                PCI_VENDOR_ID_ADAPTEC2, 0x1301)
8327         },
8328         {
8329                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8330                                PCI_VENDOR_ID_ADAPTEC2, 0x1302)
8331         },
8332         {
8333                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8334                                PCI_VENDOR_ID_ADAPTEC2, 0x1303)
8335         },
8336         {
8337                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8338                                PCI_VENDOR_ID_ADAPTEC2, 0x1380)
8339         },
8340         {
8341                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8342                                PCI_VENDOR_ID_ADVANTECH, 0x8312)
8343         },
8344         {
8345                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8346                                PCI_VENDOR_ID_DELL, 0x1fe0)
8347         },
8348         {
8349                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8350                                PCI_VENDOR_ID_HP, 0x0600)
8351         },
8352         {
8353                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8354                                PCI_VENDOR_ID_HP, 0x0601)
8355         },
8356         {
8357                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8358                                PCI_VENDOR_ID_HP, 0x0602)
8359         },
8360         {
8361                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8362                                PCI_VENDOR_ID_HP, 0x0603)
8363         },
8364         {
8365                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8366                                PCI_VENDOR_ID_HP, 0x0609)
8367         },
8368         {
8369                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8370                                PCI_VENDOR_ID_HP, 0x0650)
8371         },
8372         {
8373                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8374                                PCI_VENDOR_ID_HP, 0x0651)
8375         },
8376         {
8377                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8378                                PCI_VENDOR_ID_HP, 0x0652)
8379         },
8380         {
8381                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8382                                PCI_VENDOR_ID_HP, 0x0653)
8383         },
8384         {
8385                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8386                                PCI_VENDOR_ID_HP, 0x0654)
8387         },
8388         {
8389                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8390                                PCI_VENDOR_ID_HP, 0x0655)
8391         },
8392         {
8393                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8394                                PCI_VENDOR_ID_HP, 0x0700)
8395         },
8396         {
8397                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8398                                PCI_VENDOR_ID_HP, 0x0701)
8399         },
8400         {
8401                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8402                                PCI_VENDOR_ID_HP, 0x1001)
8403         },
8404         {
8405                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8406                                PCI_VENDOR_ID_HP, 0x1100)
8407         },
8408         {
8409                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8410                                PCI_VENDOR_ID_HP, 0x1101)
8411         },
8412         {
8413                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8414                                0x1d8d, 0x0800)
8415         },
8416         {
8417                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8418                                0x1d8d, 0x0908)
8419         },
8420         {
8421                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8422                                0x1d8d, 0x0806)
8423         },
8424         {
8425                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8426                                0x1d8d, 0x0916)
8427         },
8428         {
8429                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8430                                PCI_VENDOR_ID_GIGABYTE, 0x1000)
8431         },
8432         {
8433                 PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
8434                                PCI_ANY_ID, PCI_ANY_ID)
8435         },
8436         { 0 }
8437 };
8438
8439 MODULE_DEVICE_TABLE(pci, pqi_pci_id_table);
8440
8441 static struct pci_driver pqi_pci_driver = {
8442         .name = DRIVER_NAME_SHORT,
8443         .id_table = pqi_pci_id_table,
8444         .probe = pqi_pci_probe,
8445         .remove = pqi_pci_remove,
8446         .shutdown = pqi_shutdown,
8447 #if defined(CONFIG_PM)
8448         .suspend = pqi_suspend,
8449         .resume = pqi_resume,
8450 #endif
8451 };
8452
8453 static int __init pqi_init(void)
8454 {
8455         int rc;
8456
8457         pr_info(DRIVER_NAME "\n");
8458
8459         pqi_sas_transport_template =
8460                 sas_attach_transport(&pqi_sas_transport_functions);
8461         if (!pqi_sas_transport_template)
8462                 return -ENODEV;
8463
8464         pqi_process_module_params();
8465
8466         rc = pci_register_driver(&pqi_pci_driver);
8467         if (rc)
8468                 sas_release_transport(pqi_sas_transport_template);
8469
8470         return rc;
8471 }
8472
8473 static void __exit pqi_cleanup(void)
8474 {
8475         pci_unregister_driver(&pqi_pci_driver);
8476         sas_release_transport(pqi_sas_transport_template);
8477 }
8478
8479 module_init(pqi_init);
8480 module_exit(pqi_cleanup);
8481
8482 static void __attribute__((unused)) verify_structures(void)
8483 {
8484         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8485                 sis_host_to_ctrl_doorbell) != 0x20);
8486         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8487                 sis_interrupt_mask) != 0x34);
8488         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8489                 sis_ctrl_to_host_doorbell) != 0x9c);
8490         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8491                 sis_ctrl_to_host_doorbell_clear) != 0xa0);
8492         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8493                 sis_driver_scratch) != 0xb0);
8494         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8495                 sis_firmware_status) != 0xbc);
8496         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8497                 sis_mailbox) != 0x1000);
8498         BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers,
8499                 pqi_registers) != 0x4000);
8500
8501         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8502                 iu_type) != 0x0);
8503         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8504                 iu_length) != 0x2);
8505         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8506                 response_queue_id) != 0x4);
8507         BUILD_BUG_ON(offsetof(struct pqi_iu_header,
8508                 work_area) != 0x6);
8509         BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8);
8510
8511         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8512                 status) != 0x0);
8513         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8514                 service_response) != 0x1);
8515         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8516                 data_present) != 0x2);
8517         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8518                 reserved) != 0x3);
8519         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8520                 residual_count) != 0x4);
8521         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8522                 data_length) != 0x8);
8523         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8524                 reserved1) != 0xa);
8525         BUILD_BUG_ON(offsetof(struct pqi_aio_error_info,
8526                 data) != 0xc);
8527         BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c);
8528
8529         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8530                 data_in_result) != 0x0);
8531         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8532                 data_out_result) != 0x1);
8533         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8534                 reserved) != 0x2);
8535         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8536                 status) != 0x5);
8537         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8538                 status_qualifier) != 0x6);
8539         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8540                 sense_data_length) != 0x8);
8541         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8542                 response_data_length) != 0xa);
8543         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8544                 data_in_transferred) != 0xc);
8545         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8546                 data_out_transferred) != 0x10);
8547         BUILD_BUG_ON(offsetof(struct pqi_raid_error_info,
8548                 data) != 0x14);
8549         BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114);
8550
8551         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8552                 signature) != 0x0);
8553         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8554                 function_and_status_code) != 0x8);
8555         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8556                 max_admin_iq_elements) != 0x10);
8557         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8558                 max_admin_oq_elements) != 0x11);
8559         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8560                 admin_iq_element_length) != 0x12);
8561         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8562                 admin_oq_element_length) != 0x13);
8563         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8564                 max_reset_timeout) != 0x14);
8565         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8566                 legacy_intx_status) != 0x18);
8567         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8568                 legacy_intx_mask_set) != 0x1c);
8569         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8570                 legacy_intx_mask_clear) != 0x20);
8571         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8572                 device_status) != 0x40);
8573         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8574                 admin_iq_pi_offset) != 0x48);
8575         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8576                 admin_oq_ci_offset) != 0x50);
8577         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8578                 admin_iq_element_array_addr) != 0x58);
8579         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8580                 admin_oq_element_array_addr) != 0x60);
8581         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8582                 admin_iq_ci_addr) != 0x68);
8583         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8584                 admin_oq_pi_addr) != 0x70);
8585         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8586                 admin_iq_num_elements) != 0x78);
8587         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8588                 admin_oq_num_elements) != 0x79);
8589         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8590                 admin_queue_int_msg_num) != 0x7a);
8591         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8592                 device_error) != 0x80);
8593         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8594                 error_details) != 0x88);
8595         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8596                 device_reset) != 0x90);
8597         BUILD_BUG_ON(offsetof(struct pqi_device_registers,
8598                 power_action) != 0x94);
8599         BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100);
8600
8601         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8602                 header.iu_type) != 0);
8603         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8604                 header.iu_length) != 2);
8605         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8606                 header.work_area) != 6);
8607         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8608                 request_id) != 8);
8609         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8610                 function_code) != 10);
8611         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8612                 data.report_device_capability.buffer_length) != 44);
8613         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8614                 data.report_device_capability.sg_descriptor) != 48);
8615         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8616                 data.create_operational_iq.queue_id) != 12);
8617         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8618                 data.create_operational_iq.element_array_addr) != 16);
8619         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8620                 data.create_operational_iq.ci_addr) != 24);
8621         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8622                 data.create_operational_iq.num_elements) != 32);
8623         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8624                 data.create_operational_iq.element_length) != 34);
8625         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8626                 data.create_operational_iq.queue_protocol) != 36);
8627         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8628                 data.create_operational_oq.queue_id) != 12);
8629         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8630                 data.create_operational_oq.element_array_addr) != 16);
8631         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8632                 data.create_operational_oq.pi_addr) != 24);
8633         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8634                 data.create_operational_oq.num_elements) != 32);
8635         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8636                 data.create_operational_oq.element_length) != 34);
8637         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8638                 data.create_operational_oq.queue_protocol) != 36);
8639         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8640                 data.create_operational_oq.int_msg_num) != 40);
8641         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8642                 data.create_operational_oq.coalescing_count) != 42);
8643         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8644                 data.create_operational_oq.min_coalescing_time) != 44);
8645         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8646                 data.create_operational_oq.max_coalescing_time) != 48);
8647         BUILD_BUG_ON(offsetof(struct pqi_general_admin_request,
8648                 data.delete_operational_queue.queue_id) != 12);
8649         BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64);
8650         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8651                 data.create_operational_iq) != 64 - 11);
8652         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8653                 data.create_operational_oq) != 64 - 11);
8654         BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
8655                 data.delete_operational_queue) != 64 - 11);
8656
8657         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8658                 header.iu_type) != 0);
8659         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8660                 header.iu_length) != 2);
8661         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8662                 header.work_area) != 6);
8663         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8664                 request_id) != 8);
8665         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8666                 function_code) != 10);
8667         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8668                 status) != 11);
8669         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8670                 data.create_operational_iq.status_descriptor) != 12);
8671         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8672                 data.create_operational_iq.iq_pi_offset) != 16);
8673         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8674                 data.create_operational_oq.status_descriptor) != 12);
8675         BUILD_BUG_ON(offsetof(struct pqi_general_admin_response,
8676                 data.create_operational_oq.oq_ci_offset) != 16);
8677         BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64);
8678
8679         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8680                 header.iu_type) != 0);
8681         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8682                 header.iu_length) != 2);
8683         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8684                 header.response_queue_id) != 4);
8685         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8686                 header.work_area) != 6);
8687         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8688                 request_id) != 8);
8689         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8690                 nexus_id) != 10);
8691         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8692                 buffer_length) != 12);
8693         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8694                 lun_number) != 16);
8695         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8696                 protocol_specific) != 24);
8697         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8698                 error_index) != 27);
8699         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8700                 cdb) != 32);
8701         BUILD_BUG_ON(offsetof(struct pqi_raid_path_request,
8702                 sg_descriptors) != 64);
8703         BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) !=
8704                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8705
8706         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8707                 header.iu_type) != 0);
8708         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8709                 header.iu_length) != 2);
8710         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8711                 header.response_queue_id) != 4);
8712         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8713                 header.work_area) != 6);
8714         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8715                 request_id) != 8);
8716         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8717                 nexus_id) != 12);
8718         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8719                 buffer_length) != 16);
8720         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8721                 data_encryption_key_index) != 22);
8722         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8723                 encrypt_tweak_lower) != 24);
8724         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8725                 encrypt_tweak_upper) != 28);
8726         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8727                 cdb) != 32);
8728         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8729                 error_index) != 48);
8730         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8731                 num_sg_descriptors) != 50);
8732         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8733                 cdb_length) != 51);
8734         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8735                 lun_number) != 52);
8736         BUILD_BUG_ON(offsetof(struct pqi_aio_path_request,
8737                 sg_descriptors) != 64);
8738         BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) !=
8739                 PQI_OPERATIONAL_IQ_ELEMENT_LENGTH);
8740
8741         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8742                 header.iu_type) != 0);
8743         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8744                 header.iu_length) != 2);
8745         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8746                 request_id) != 8);
8747         BUILD_BUG_ON(offsetof(struct pqi_io_response,
8748                 error_index) != 10);
8749
8750         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8751                 header.iu_type) != 0);
8752         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8753                 header.iu_length) != 2);
8754         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8755                 header.response_queue_id) != 4);
8756         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8757                 request_id) != 8);
8758         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8759                 data.report_event_configuration.buffer_length) != 12);
8760         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8761                 data.report_event_configuration.sg_descriptors) != 16);
8762         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8763                 data.set_event_configuration.global_event_oq_id) != 10);
8764         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8765                 data.set_event_configuration.buffer_length) != 12);
8766         BUILD_BUG_ON(offsetof(struct pqi_general_management_request,
8767                 data.set_event_configuration.sg_descriptors) != 16);
8768
8769         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8770                 max_inbound_iu_length) != 6);
8771         BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor,
8772                 max_outbound_iu_length) != 14);
8773         BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16);
8774
8775         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8776                 data_length) != 0);
8777         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8778                 iq_arbitration_priority_support_bitmask) != 8);
8779         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8780                 maximum_aw_a) != 9);
8781         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8782                 maximum_aw_b) != 10);
8783         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8784                 maximum_aw_c) != 11);
8785         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8786                 max_inbound_queues) != 16);
8787         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8788                 max_elements_per_iq) != 18);
8789         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8790                 max_iq_element_length) != 24);
8791         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8792                 min_iq_element_length) != 26);
8793         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8794                 max_outbound_queues) != 30);
8795         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8796                 max_elements_per_oq) != 32);
8797         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8798                 intr_coalescing_time_granularity) != 34);
8799         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8800                 max_oq_element_length) != 36);
8801         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8802                 min_oq_element_length) != 38);
8803         BUILD_BUG_ON(offsetof(struct pqi_device_capability,
8804                 iu_layer_descriptors) != 64);
8805         BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576);
8806
8807         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8808                 event_type) != 0);
8809         BUILD_BUG_ON(offsetof(struct pqi_event_descriptor,
8810                 oq_id) != 2);
8811         BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4);
8812
8813         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8814                 num_event_descriptors) != 2);
8815         BUILD_BUG_ON(offsetof(struct pqi_event_config,
8816                 descriptors) != 4);
8817
8818         BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS !=
8819                 ARRAY_SIZE(pqi_supported_event_types));
8820
8821         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8822                 header.iu_type) != 0);
8823         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8824                 header.iu_length) != 2);
8825         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8826                 event_type) != 8);
8827         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8828                 event_id) != 10);
8829         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8830                 additional_event_id) != 12);
8831         BUILD_BUG_ON(offsetof(struct pqi_event_response,
8832                 data) != 16);
8833         BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32);
8834
8835         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8836                 header.iu_type) != 0);
8837         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8838                 header.iu_length) != 2);
8839         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8840                 event_type) != 8);
8841         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8842                 event_id) != 10);
8843         BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request,
8844                 additional_event_id) != 12);
8845         BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16);
8846
8847         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8848                 header.iu_type) != 0);
8849         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8850                 header.iu_length) != 2);
8851         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8852                 request_id) != 8);
8853         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8854                 nexus_id) != 10);
8855         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8856                 lun_number) != 16);
8857         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8858                 protocol_specific) != 24);
8859         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8860                 outbound_queue_id_to_manage) != 26);
8861         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8862                 request_id_to_manage) != 28);
8863         BUILD_BUG_ON(offsetof(struct pqi_task_management_request,
8864                 task_management_function) != 30);
8865         BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32);
8866
8867         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8868                 header.iu_type) != 0);
8869         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8870                 header.iu_length) != 2);
8871         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8872                 request_id) != 8);
8873         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8874                 nexus_id) != 10);
8875         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8876                 additional_response_info) != 12);
8877         BUILD_BUG_ON(offsetof(struct pqi_task_management_response,
8878                 response_code) != 15);
8879         BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16);
8880
8881         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8882                 configured_logical_drive_count) != 0);
8883         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8884                 configuration_signature) != 1);
8885         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8886                 firmware_version) != 5);
8887         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8888                 extended_logical_unit_count) != 154);
8889         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8890                 firmware_build_number) != 190);
8891         BUILD_BUG_ON(offsetof(struct bmic_identify_controller,
8892                 controller_mode) != 292);
8893
8894         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8895                 phys_bay_in_box) != 115);
8896         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8897                 device_type) != 120);
8898         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8899                 redundant_path_present_map) != 1736);
8900         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8901                 active_path_number) != 1738);
8902         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8903                 alternate_paths_phys_connector) != 1739);
8904         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8905                 alternate_paths_phys_box_on_port) != 1755);
8906         BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device,
8907                 current_queue_depth_limit) != 1796);
8908         BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560);
8909
8910         BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255);
8911         BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255);
8912         BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH %
8913                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8914         BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH %
8915                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8916         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560);
8917         BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH %
8918                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8919         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560);
8920         BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH %
8921                 PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0);
8922
8923         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS);
8924         BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >=
8925                 PQI_MAX_OUTSTANDING_REQUESTS_KDUMP);
8926 }