drivers/scsi/mpt2sas/mpt2sas_ctl.c

   1 /*
   2  * Management Module Support for MPT (Message Passing Technology) based
   3  * controllers
   4  *
   5  * This code is based on drivers/scsi/mpt2sas/mpt2_ctl.c
   6  * Copyright (C) 2007-2013  LSI Corporation
   7  *  (mailto:DL-MPTFusionLinux@lsi.com)
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * NO WARRANTY
  20  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  21  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  22  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  23  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  24  * solely responsible for determining the appropriateness of using and
  25  * distributing the Program and assumes all risks associated with its
  26  * exercise of rights under this Agreement, including but not limited to
  27  * the risks and costs of program errors, damage to or loss of data,
  28  * programs or equipment, and unavailability or interruption of operations.
  29
  30  * DISCLAIMER OF LIABILITY
  31  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  32  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  34  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  35  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  36  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  37  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  38
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  42  * USA.
  43  */
  44
  45 #include <linux/kernel.h>
  46 #include <linux/module.h>
  47 #include <linux/errno.h>
  48 #include <linux/init.h>
  49 #include <linux/slab.h>
  50 #include <linux/types.h>
  51 #include <linux/pci.h>
  52 #include <linux/delay.h>
  53 #include <linux/mutex.h>
  54 #include <linux/compat.h>
  55 #include <linux/poll.h>
  56
  57 #include <linux/io.h>
  58 #include <linux/uaccess.h>
  59
  60 #include "mpt2sas_base.h"
  61 #include "mpt2sas_ctl.h"
  62
  63 static DEFINE_MUTEX(_ctl_mutex);
  64 static struct fasync_struct *async_queue;
  65 static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
  66
  67 static int _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type,
  68     u8 *issue_reset);
  69
  70 /**
  71  * enum block_state - blocking state
  72  * @NON_BLOCKING: non blocking
  73  * @BLOCKING: blocking
  74  *
  75  * These states are for ioctls that need to wait for a response
  76  * from firmware, so they probably require sleep.
  77  */
  78 enum block_state {
  79         NON_BLOCKING,
  80         BLOCKING,
  81 };
  82
  83 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
  84 /**
  85  * _ctl_sas_device_find_by_handle - sas device search
  86  * @ioc: per adapter object
  87  * @handle: sas device handle (assigned by firmware)
  88  * Context: Calling function should acquire ioc->sas_device_lock
  89  *
  90  * This searches for sas_device based on sas_address, then return sas_device
  91  * object.
  92  */
  93 static struct _sas_device *
  94 _ctl_sas_device_find_by_handle(struct MPT2SAS_ADAPTER *ioc, u16 handle)
  95 {
  96         struct _sas_device *sas_device, *r;
  97
  98         r = NULL;
  99         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
 100                 if (sas_device->handle != handle)
 101                         continue;
 102                 r = sas_device;
 103                 goto out;
 104         }
 105
 106  out:
 107         return r;
 108 }
 109
 110 /**
 111  * _ctl_display_some_debug - debug routine
 112  * @ioc: per adapter object
 113  * @smid: system request message index
 114  * @calling_function_name: string pass from calling function
 115  * @mpi_reply: reply message frame
 116  * Context: none.
 117  *
 118  * Function for displaying debug info helpful when debugging issues
 119  * in this module.
 120  */
 121 static void
 122 _ctl_display_some_debug(struct MPT2SAS_ADAPTER *ioc, u16 smid,
 123     char *calling_function_name, MPI2DefaultReply_t *mpi_reply)
 124 {
 125         Mpi2ConfigRequest_t *mpi_request;
 126         char *desc = NULL;
 127
 128         if (!(ioc->logging_level & MPT_DEBUG_IOCTL))
 129                 return;
 130
 131         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 132         switch (mpi_request->Function) {
 133         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 134         {
 135                 Mpi2SCSIIORequest_t *scsi_request =
 136                     (Mpi2SCSIIORequest_t *)mpi_request;
 137
 138                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 139                     "scsi_io, cmd(0x%02x), cdb_len(%d)",
 140                     scsi_request->CDB.CDB32[0],
 141                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 142                 desc = ioc->tmp_string;
 143                 break;
 144         }
 145         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 146                 desc = "task_mgmt";
 147                 break;
 148         case MPI2_FUNCTION_IOC_INIT:
 149                 desc = "ioc_init";
 150                 break;
 151         case MPI2_FUNCTION_IOC_FACTS:
 152                 desc = "ioc_facts";
 153                 break;
 154         case MPI2_FUNCTION_CONFIG:
 155         {
 156                 Mpi2ConfigRequest_t *config_request =
 157                     (Mpi2ConfigRequest_t *)mpi_request;
 158
 159                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 160                     "config, type(0x%02x), ext_type(0x%02x), number(%d)",
 161                     (config_request->Header.PageType &
 162                      MPI2_CONFIG_PAGETYPE_MASK), config_request->ExtPageType,
 163                     config_request->Header.PageNumber);
 164                 desc = ioc->tmp_string;
 165                 break;
 166         }
 167         case MPI2_FUNCTION_PORT_FACTS:
 168                 desc = "port_facts";
 169                 break;
 170         case MPI2_FUNCTION_PORT_ENABLE:
 171                 desc = "port_enable";
 172                 break;
 173         case MPI2_FUNCTION_EVENT_NOTIFICATION:
 174                 desc = "event_notification";
 175                 break;
 176         case MPI2_FUNCTION_FW_DOWNLOAD:
 177                 desc = "fw_download";
 178                 break;
 179         case MPI2_FUNCTION_FW_UPLOAD:
 180                 desc = "fw_upload";
 181                 break;
 182         case MPI2_FUNCTION_RAID_ACTION:
 183                 desc = "raid_action";
 184                 break;
 185         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 186         {
 187                 Mpi2SCSIIORequest_t *scsi_request =
 188                     (Mpi2SCSIIORequest_t *)mpi_request;
 189
 190                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 191                     "raid_pass, cmd(0x%02x), cdb_len(%d)",
 192                     scsi_request->CDB.CDB32[0],
 193                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 194                 desc = ioc->tmp_string;
 195                 break;
 196         }
 197         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 198                 desc = "sas_iounit_cntl";
 199                 break;
 200         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 201                 desc = "sata_pass";
 202                 break;
 203         case MPI2_FUNCTION_DIAG_BUFFER_POST:
 204                 desc = "diag_buffer_post";
 205                 break;
 206         case MPI2_FUNCTION_DIAG_RELEASE:
 207                 desc = "diag_release";
 208                 break;
 209         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 210                 desc = "smp_passthrough";
 211                 break;
 212         }
 213
 214         if (!desc)
 215                 return;
 216
 217         printk(MPT2SAS_INFO_FMT "%s: %s, smid(%d)\n",
 218             ioc->name, calling_function_name, desc, smid);
 219
 220         if (!mpi_reply)
 221                 return;
 222
 223         if (mpi_reply->IOCStatus || mpi_reply->IOCLogInfo)
 224                 printk(MPT2SAS_INFO_FMT
 225                     "\tiocstatus(0x%04x), loginfo(0x%08x)\n",
 226                     ioc->name, le16_to_cpu(mpi_reply->IOCStatus),
 227                     le32_to_cpu(mpi_reply->IOCLogInfo));
 228
 229         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 230             mpi_request->Function ==
 231             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 232                 Mpi2SCSIIOReply_t *scsi_reply =
 233                     (Mpi2SCSIIOReply_t *)mpi_reply;
 234                 struct _sas_device *sas_device = NULL;
 235                 unsigned long flags;
 236
 237                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
 238                 sas_device = _ctl_sas_device_find_by_handle(ioc,
 239                     le16_to_cpu(scsi_reply->DevHandle));
 240                 if (sas_device) {
 241                         printk(MPT2SAS_WARN_FMT "\tsas_address(0x%016llx), "
 242                             "phy(%d)\n", ioc->name, (unsigned long long)
 243                             sas_device->sas_address, sas_device->phy);
 244                         printk(MPT2SAS_WARN_FMT
 245                             "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 246                             ioc->name, sas_device->enclosure_logical_id,
 247                             sas_device->slot);
 248                 }
 249                 spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
 250                 if (scsi_reply->SCSIState || scsi_reply->SCSIStatus)
 251                         printk(MPT2SAS_INFO_FMT
 252                             "\tscsi_state(0x%02x), scsi_status"
 253                             "(0x%02x)\n", ioc->name,
 254                             scsi_reply->SCSIState,
 255                             scsi_reply->SCSIStatus);
 256         }
 257 }
 258 #endif
 259
 260 /**
 261  * mpt2sas_ctl_done - ctl module completion routine
 262  * @ioc: per adapter object
 263  * @smid: system request message index
 264  * @msix_index: MSIX table index supplied by the OS
 265  * @reply: reply message frame(lower 32bit addr)
 266  * Context: none.
 267  *
 268  * The callback handler when using ioc->ctl_cb_idx.
 269  *
 270  * Return 1 meaning mf should be freed from _base_interrupt
 271  *        0 means the mf is freed from this function.
 272  */
 273 u8
 274 mpt2sas_ctl_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 275         u32 reply)
 276 {
 277         MPI2DefaultReply_t *mpi_reply;
 278         Mpi2SCSIIOReply_t *scsiio_reply;
 279         const void *sense_data;
 280         u32 sz;
 281
 282         if (ioc->ctl_cmds.status == MPT2_CMD_NOT_USED)
 283                 return 1;
 284         if (ioc->ctl_cmds.smid != smid)
 285                 return 1;
 286         ioc->ctl_cmds.status |= MPT2_CMD_COMPLETE;
 287         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 288         if (mpi_reply) {
 289                 memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 290                 ioc->ctl_cmds.status |= MPT2_CMD_REPLY_VALID;
 291                 /* get sense data */
 292                 if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 293                     mpi_reply->Function ==
 294                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 295                         scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply;
 296                         if (scsiio_reply->SCSIState &
 297                             MPI2_SCSI_STATE_AUTOSENSE_VALID) {
 298                                 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
 299                                     le32_to_cpu(scsiio_reply->SenseCount));
 300                                 sense_data = mpt2sas_base_get_sense_buffer(ioc,
 301                                     smid);
 302                                 memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 303                         }
 304                 }
 305         }
 306 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 307         _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply);
 308 #endif
 309         ioc->ctl_cmds.status &= ~MPT2_CMD_PENDING;
 310         complete(&ioc->ctl_cmds.done);
 311         return 1;
 312 }
 313
 314 /**
 315  * _ctl_check_event_type - determines when an event needs logging
 316  * @ioc: per adapter object
 317  * @event: firmware event
 318  *
 319  * The bitmask in ioc->event_type[] indicates which events should be
 320  * be saved in the driver event_log.  This bitmask is set by application.
 321  *
 322  * Returns 1 when event should be captured, or zero means no match.
 323  */
 324 static int
 325 _ctl_check_event_type(struct MPT2SAS_ADAPTER *ioc, u16 event)
 326 {
 327         u16 i;
 328         u32 desired_event;
 329
 330         if (event >= 128 || !event || !ioc->event_log)
 331                 return 0;
 332
 333         desired_event = (1 << (event % 32));
 334         if (!desired_event)
 335                 desired_event = 1;
 336         i = event / 32;
 337         return desired_event & ioc->event_type[i];
 338 }
 339
 340 /**
 341  * mpt2sas_ctl_add_to_event_log - add event
 342  * @ioc: per adapter object
 343  * @mpi_reply: reply message frame
 344  *
 345  * Return nothing.
 346  */
 347 void
 348 mpt2sas_ctl_add_to_event_log(struct MPT2SAS_ADAPTER *ioc,
 349     Mpi2EventNotificationReply_t *mpi_reply)
 350 {
 351         struct MPT2_IOCTL_EVENTS *event_log;
 352         u16 event;
 353         int i;
 354         u32 sz, event_data_sz;
 355         u8 send_aen = 0;
 356
 357         if (!ioc->event_log)
 358                 return;
 359
 360         event = le16_to_cpu(mpi_reply->Event);
 361
 362         if (_ctl_check_event_type(ioc, event)) {
 363
 364                 /* insert entry into circular event_log */
 365                 i = ioc->event_context % MPT2SAS_CTL_EVENT_LOG_SIZE;
 366                 event_log = ioc->event_log;
 367                 event_log[i].event = event;
 368                 event_log[i].context = ioc->event_context++;
 369
 370                 event_data_sz = le16_to_cpu(mpi_reply->EventDataLength)*4;
 371                 sz = min_t(u32, event_data_sz, MPT2_EVENT_DATA_SIZE);
 372                 memset(event_log[i].data, 0, MPT2_EVENT_DATA_SIZE);
 373                 memcpy(event_log[i].data, mpi_reply->EventData, sz);
 374                 send_aen = 1;
 375         }
 376
 377         /* This aen_event_read_flag flag is set until the
 378          * application has read the event log.
 379          * For MPI2_EVENT_LOG_ENTRY_ADDED, we always notify.
 380          */
 381         if (event == MPI2_EVENT_LOG_ENTRY_ADDED ||
 382             (send_aen && !ioc->aen_event_read_flag)) {
 383                 ioc->aen_event_read_flag = 1;
 384                 wake_up_interruptible(&ctl_poll_wait);
 385                 if (async_queue)
 386                         kill_fasync(&async_queue, SIGIO, POLL_IN);
 387         }
 388 }
 389
 390 /**
 391  * mpt2sas_ctl_event_callback - firmware event handler (called at ISR time)
 392  * @ioc: per adapter object
 393  * @msix_index: MSIX table index supplied by the OS
 394  * @reply: reply message frame(lower 32bit addr)
 395  * Context: interrupt.
 396  *
 397  * This function merely adds a new work task into ioc->firmware_event_thread.
 398  * The tasks are worked from _firmware_event_work in user context.
 399  *
 400  * Returns void.
 401  */
 402 void
 403 mpt2sas_ctl_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index,
 404         u32 reply)
 405 {
 406         Mpi2EventNotificationReply_t *mpi_reply;
 407
 408         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 409         if (unlikely(!mpi_reply)) {
 410                 printk(MPT2SAS_ERR_FMT "mpi_reply not valid at %s:%d/%s()!\n",
 411                     ioc->name, __FILE__, __LINE__, __func__);
 412                 return;
 413         }
 414         mpt2sas_ctl_add_to_event_log(ioc, mpi_reply);
 415         return;
 416 }
 417
 418 /**
 419  * _ctl_verify_adapter - validates ioc_number passed from application
 420  * @ioc: per adapter object
 421  * @iocpp: The ioc pointer is returned in this.
 422  *
 423  * Return (-1) means error, else ioc_number.
 424  */
 425 static int
 426 _ctl_verify_adapter(int ioc_number, struct MPT2SAS_ADAPTER **iocpp)
 427 {
 428         struct MPT2SAS_ADAPTER *ioc;
 429
 430         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 431                 if (ioc->id != ioc_number)
 432                         continue;
 433                 *iocpp = ioc;
 434                 return ioc_number;
 435         }
 436         *iocpp = NULL;
 437         return -1;
 438 }
 439
 440 /**
 441  * mpt2sas_ctl_reset_handler - reset callback handler (for ctl)
 442  * @ioc: per adapter object
 443  * @reset_phase: phase
 444  *
 445  * The handler for doing any required cleanup or initialization.
 446  *
 447  * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
 448  * MPT2_IOC_DONE_RESET
 449  */
 450 void
 451 mpt2sas_ctl_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
 452 {
 453         int i;
 454         u8 issue_reset;
 455
 456         switch (reset_phase) {
 457         case MPT2_IOC_PRE_RESET:
 458                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 459                     "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
 460                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 461                         if (!(ioc->diag_buffer_status[i] &
 462                             MPT2_DIAG_BUFFER_IS_REGISTERED))
 463                                 continue;
 464                         if ((ioc->diag_buffer_status[i] &
 465                             MPT2_DIAG_BUFFER_IS_RELEASED))
 466                                 continue;
 467                         _ctl_send_release(ioc, i, &issue_reset);
 468                 }
 469                 break;
 470         case MPT2_IOC_AFTER_RESET:
 471                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 472                     "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
 473                 if (ioc->ctl_cmds.status & MPT2_CMD_PENDING) {
 474                         ioc->ctl_cmds.status |= MPT2_CMD_RESET;
 475                         mpt2sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
 476                         complete(&ioc->ctl_cmds.done);
 477                 }
 478                 break;
 479         case MPT2_IOC_DONE_RESET:
 480                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 481                     "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
 482
 483                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 484                         if (!(ioc->diag_buffer_status[i] &
 485                             MPT2_DIAG_BUFFER_IS_REGISTERED))
 486                                 continue;
 487                         if ((ioc->diag_buffer_status[i] &
 488                             MPT2_DIAG_BUFFER_IS_RELEASED))
 489                                 continue;
 490                         ioc->diag_buffer_status[i] |=
 491                             MPT2_DIAG_BUFFER_IS_DIAG_RESET;
 492                 }
 493                 break;
 494         }
 495 }
 496
 497 /**
 498  * _ctl_fasync -
 499  * @fd -
 500  * @filep -
 501  * @mode -
 502  *
 503  * Called when application request fasyn callback handler.
 504  */
 505 static int
 506 _ctl_fasync(int fd, struct file *filep, int mode)
 507 {
 508         return fasync_helper(fd, filep, mode, &async_queue);
 509 }
 510
 511 /**
 512  * _ctl_poll -
 513  * @file -
 514  * @wait -
 515  *
 516  */
 517 static unsigned int
 518 _ctl_poll(struct file *filep, poll_table *wait)
 519 {
 520         struct MPT2SAS_ADAPTER *ioc;
 521
 522         poll_wait(filep, &ctl_poll_wait, wait);
 523
 524         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 525                 if (ioc->aen_event_read_flag)
 526                         return POLLIN | POLLRDNORM;
 527         }
 528         return 0;
 529 }
 530
 531 /**
 532  * _ctl_set_task_mid - assign an active smid to tm request
 533  * @ioc: per adapter object
 534  * @karg - (struct mpt2_ioctl_command)
 535  * @tm_request - pointer to mf from user space
 536  *
 537  * Returns 0 when an smid if found, else fail.
 538  * during failure, the reply frame is filled.
 539  */
 540 static int
 541 _ctl_set_task_mid(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command *karg,
 542     Mpi2SCSITaskManagementRequest_t *tm_request)
 543 {
 544         u8 found = 0;
 545         u16 i;
 546         u16 handle;
 547         struct scsi_cmnd *scmd;
 548         struct MPT2SAS_DEVICE *priv_data;
 549         unsigned long flags;
 550         Mpi2SCSITaskManagementReply_t *tm_reply;
 551         u32 sz;
 552         u32 lun;
 553         char *desc = NULL;
 554
 555         if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
 556                 desc = "abort_task";
 557         else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
 558                 desc = "query_task";
 559         else
 560                 return 0;
 561
 562         lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
 563
 564         handle = le16_to_cpu(tm_request->DevHandle);
 565         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
 566         for (i = ioc->scsiio_depth; i && !found; i--) {
 567                 scmd = ioc->scsi_lookup[i - 1].scmd;
 568                 if (scmd == NULL || scmd->device == NULL ||
 569                     scmd->device->hostdata == NULL)
 570                         continue;
 571                 if (lun != scmd->device->lun)
 572                         continue;
 573                 priv_data = scmd->device->hostdata;
 574                 if (priv_data->sas_target == NULL)
 575                         continue;
 576                 if (priv_data->sas_target->handle != handle)
 577                         continue;
 578                 tm_request->TaskMID = cpu_to_le16(ioc->scsi_lookup[i - 1].smid);
 579                 found = 1;
 580         }
 581         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
 582
 583         if (!found) {
 584                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 585                     "handle(0x%04x), lun(%d), no active mid!!\n", ioc->name,
 586                     desc, le16_to_cpu(tm_request->DevHandle), lun));
 587                 tm_reply = ioc->ctl_cmds.reply;
 588                 tm_reply->DevHandle = tm_request->DevHandle;
 589                 tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 590                 tm_reply->TaskType = tm_request->TaskType;
 591                 tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
 592                 tm_reply->VP_ID = tm_request->VP_ID;
 593                 tm_reply->VF_ID = tm_request->VF_ID;
 594                 sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
 595                 if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 596                     sz))
 597                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 598                             __LINE__, __func__);
 599                 return 1;
 600         }
 601
 602         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 603             "handle(0x%04x), lun(%d), task_mid(%d)\n", ioc->name,
 604             desc, le16_to_cpu(tm_request->DevHandle), lun,
 605              le16_to_cpu(tm_request->TaskMID)));
 606         return 0;
 607 }
 608
 609 /**
 610  * _ctl_do_mpt_command - main handler for MPT2COMMAND opcode
 611  * @ioc: per adapter object
 612  * @karg - (struct mpt2_ioctl_command)
 613  * @mf - pointer to mf in user space
 614  */
 615 static long
 616 _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command karg,
 617         void __user *mf)
 618 {
 619         MPI2RequestHeader_t *mpi_request = NULL, *request;
 620         MPI2DefaultReply_t *mpi_reply;
 621         u32 ioc_state;
 622         u16 ioc_status;
 623         u16 smid;
 624         unsigned long timeout, timeleft;
 625         u8 issue_reset;
 626         u32 sz;
 627         void *psge;
 628         void *data_out = NULL;
 629         dma_addr_t data_out_dma;
 630         size_t data_out_sz = 0;
 631         void *data_in = NULL;
 632         dma_addr_t data_in_dma;
 633         size_t data_in_sz = 0;
 634         u32 sgl_flags;
 635         long ret;
 636         u16 wait_state_count;
 637
 638         issue_reset = 0;
 639
 640         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
 641                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
 642                     ioc->name, __func__);
 643                 ret = -EAGAIN;
 644                 goto out;
 645         }
 646
 647         wait_state_count = 0;
 648         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 649         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 650                 if (wait_state_count++ == 10) {
 651                         printk(MPT2SAS_ERR_FMT
 652                             "%s: failed due to ioc not operational\n",
 653                             ioc->name, __func__);
 654                         ret = -EFAULT;
 655                         goto out;
 656                 }
 657                 ssleep(1);
 658                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 659                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 660                     "operational state(count=%d)\n", ioc->name,
 661                     __func__, wait_state_count);
 662         }
 663         if (wait_state_count)
 664                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 665                     ioc->name, __func__);
 666
 667         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 668         if (!mpi_request) {
 669                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a memory for "
 670                     "mpi_request\n", ioc->name, __func__);
 671                 ret = -ENOMEM;
 672                 goto out;
 673         }
 674
 675         /* Check for overflow and wraparound */
 676         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 677             karg.data_sge_offset > (UINT_MAX / 4)) {
 678                 ret = -EINVAL;
 679                 goto out;
 680         }
 681
 682         /* copy in request message frame from user */
 683         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 684                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 685                     __func__);
 686                 ret = -EFAULT;
 687                 goto out;
 688         }
 689
 690         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 691                 smid = mpt2sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 692                 if (!smid) {
 693                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 694                             ioc->name, __func__);
 695                         ret = -EAGAIN;
 696                         goto out;
 697                 }
 698         } else {
 699
 700                 smid = mpt2sas_base_get_smid_scsiio(ioc, ioc->ctl_cb_idx, NULL);
 701                 if (!smid) {
 702                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 703                             ioc->name, __func__);
 704                         ret = -EAGAIN;
 705                         goto out;
 706                 }
 707         }
 708
 709         ret = 0;
 710         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
 711         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 712         request = mpt2sas_base_get_msg_frame(ioc, smid);
 713         memcpy(request, mpi_request, karg.data_sge_offset*4);
 714         ioc->ctl_cmds.smid = smid;
 715         data_out_sz = karg.data_out_size;
 716         data_in_sz = karg.data_in_size;
 717
 718         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 719             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 720                 if (!le16_to_cpu(mpi_request->FunctionDependent1) ||
 721                     le16_to_cpu(mpi_request->FunctionDependent1) >
 722                     ioc->facts.MaxDevHandle) {
 723                         ret = -EINVAL;
 724                         mpt2sas_base_free_smid(ioc, smid);
 725                         goto out;
 726                 }
 727         }
 728
 729         /* obtain dma-able memory for data transfer */
 730         if (data_out_sz) /* WRITE */ {
 731                 data_out = pci_alloc_consistent(ioc->pdev, data_out_sz,
 732                     &data_out_dma);
 733                 if (!data_out) {
 734                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 735                             __LINE__, __func__);
 736                         ret = -ENOMEM;
 737                         mpt2sas_base_free_smid(ioc, smid);
 738                         goto out;
 739                 }
 740                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 741                         data_out_sz)) {
 742                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 743                             __LINE__, __func__);
 744                         ret =  -EFAULT;
 745                         mpt2sas_base_free_smid(ioc, smid);
 746                         goto out;
 747                 }
 748         }
 749
 750         if (data_in_sz) /* READ */ {
 751                 data_in = pci_alloc_consistent(ioc->pdev, data_in_sz,
 752                     &data_in_dma);
 753                 if (!data_in) {
 754                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 755                             __LINE__, __func__);
 756                         ret = -ENOMEM;
 757                         mpt2sas_base_free_smid(ioc, smid);
 758                         goto out;
 759                 }
 760         }
 761
 762         /* add scatter gather elements */
 763         psge = (void *)request + (karg.data_sge_offset*4);
 764
 765         if (!data_out_sz && !data_in_sz) {
 766                 mpt2sas_base_build_zero_len_sge(ioc, psge);
 767         } else if (data_out_sz && data_in_sz) {
 768                 /* WRITE sgel first */
 769                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 770                     MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 771                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 772                 ioc->base_add_sg_single(psge, sgl_flags |
 773                     data_out_sz, data_out_dma);
 774
 775                 /* incr sgel */
 776                 psge += ioc->sge_size;
 777
 778                 /* READ sgel last */
 779                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 780                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 781                     MPI2_SGE_FLAGS_END_OF_LIST);
 782                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 783                 ioc->base_add_sg_single(psge, sgl_flags |
 784                     data_in_sz, data_in_dma);
 785         } else if (data_out_sz) /* WRITE */ {
 786                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 787                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 788                     MPI2_SGE_FLAGS_END_OF_LIST | MPI2_SGE_FLAGS_HOST_TO_IOC);
 789                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 790                 ioc->base_add_sg_single(psge, sgl_flags |
 791                     data_out_sz, data_out_dma);
 792         } else if (data_in_sz) /* READ */ {
 793                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 794                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 795                     MPI2_SGE_FLAGS_END_OF_LIST);
 796                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 797                 ioc->base_add_sg_single(psge, sgl_flags |
 798                     data_in_sz, data_in_dma);
 799         }
 800
 801         /* send command to firmware */
 802 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 803         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 804 #endif
 805
 806         init_completion(&ioc->ctl_cmds.done);
 807         switch (mpi_request->Function) {
 808         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 809         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 810         {
 811                 Mpi2SCSIIORequest_t *scsiio_request =
 812                     (Mpi2SCSIIORequest_t *)request;
 813                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 814                 scsiio_request->SenseBufferLowAddress =
 815                     mpt2sas_base_get_sense_buffer_dma(ioc, smid);
 816                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 817                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 818                         mpt2sas_base_put_smid_scsi_io(ioc, smid,
 819                             le16_to_cpu(mpi_request->FunctionDependent1));
 820                 else
 821                         mpt2sas_base_put_smid_default(ioc, smid);
 822                 break;
 823         }
 824         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 825         {
 826                 Mpi2SCSITaskManagementRequest_t *tm_request =
 827                     (Mpi2SCSITaskManagementRequest_t *)request;
 828
 829                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 830                     "handle(0x%04x), task_type(0x%02x)\n", ioc->name,
 831                     le16_to_cpu(tm_request->DevHandle), tm_request->TaskType));
 832
 833                 if (tm_request->TaskType ==
 834                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 835                     tm_request->TaskType ==
 836                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 837                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 838                                 mpt2sas_base_free_smid(ioc, smid);
 839                                 goto out;
 840                         }
 841                 }
 842
 843                 mpt2sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 844                     tm_request->DevHandle));
 845                 mpt2sas_base_put_smid_hi_priority(ioc, smid);
 846                 break;
 847         }
 848         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 849         {
 850                 Mpi2SmpPassthroughRequest_t *smp_request =
 851                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 852                 u8 *data;
 853
 854                 /* ioc determines which port to use */
 855                 smp_request->PhysicalPort = 0xFF;
 856                 if (smp_request->PassthroughFlags &
 857                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 858                         data = (u8 *)&smp_request->SGL;
 859                 else {
 860                         if (unlikely(data_out == NULL)) {
 861                                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
 862                                     __FILE__, __LINE__, __func__);
 863                                 mpt2sas_base_free_smid(ioc, smid);
 864                                 ret = -EINVAL;
 865                                 goto out;
 866                         }
 867                         data = data_out;
 868                 }
 869
 870                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 871                         ioc->ioc_link_reset_in_progress = 1;
 872                         ioc->ignore_loginfos = 1;
 873                 }
 874                 mpt2sas_base_put_smid_default(ioc, smid);
 875                 break;
 876         }
 877         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 878         {
 879                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
 880                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
 881
 882                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
 883                     || sasiounit_request->Operation ==
 884                     MPI2_SAS_OP_PHY_LINK_RESET) {
 885                         ioc->ioc_link_reset_in_progress = 1;
 886                         ioc->ignore_loginfos = 1;
 887                 }
 888                 mpt2sas_base_put_smid_default(ioc, smid);
 889                 break;
 890         }
 891         default:
 892                 mpt2sas_base_put_smid_default(ioc, smid);
 893                 break;
 894         }
 895
 896         if (karg.timeout < MPT2_IOCTL_DEFAULT_TIMEOUT)
 897                 timeout = MPT2_IOCTL_DEFAULT_TIMEOUT;
 898         else
 899                 timeout = karg.timeout;
 900         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
 901             timeout*HZ);
 902         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 903                 Mpi2SCSITaskManagementRequest_t *tm_request =
 904                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
 905                 mpt2sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
 906                     tm_request->DevHandle));
 907         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
 908             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
 909                 ioc->ioc_link_reset_in_progress) {
 910                 ioc->ioc_link_reset_in_progress = 0;
 911                 ioc->ignore_loginfos = 0;
 912         }
 913         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
 914                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
 915                     __func__);
 916                 _debug_dump_mf(mpi_request, karg.data_sge_offset);
 917                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
 918                         issue_reset = 1;
 919                 goto issue_host_reset;
 920         }
 921
 922         mpi_reply = ioc->ctl_cmds.reply;
 923         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
 924
 925 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 926         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
 927             (ioc->logging_level & MPT_DEBUG_TM)) {
 928                 Mpi2SCSITaskManagementReply_t *tm_reply =
 929                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
 930
 931                 printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 932                     "IOCStatus(0x%04x), IOCLogInfo(0x%08x), "
 933                     "TerminationCount(0x%08x)\n", ioc->name,
 934                     le16_to_cpu(tm_reply->IOCStatus),
 935                     le32_to_cpu(tm_reply->IOCLogInfo),
 936                     le32_to_cpu(tm_reply->TerminationCount));
 937         }
 938 #endif
 939         /* copy out xdata to user */
 940         if (data_in_sz) {
 941                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
 942                     data_in_sz)) {
 943                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 944                             __LINE__, __func__);
 945                         ret = -ENODATA;
 946                         goto out;
 947                 }
 948         }
 949
 950         /* copy out reply message frame to user */
 951         if (karg.max_reply_bytes) {
 952                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
 953                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 954                     sz)) {
 955                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 956                             __LINE__, __func__);
 957                         ret = -ENODATA;
 958                         goto out;
 959                 }
 960         }
 961
 962         /* copy out sense to user */
 963         if (karg.max_sense_bytes && (mpi_request->Function ==
 964             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
 965             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) {
 966                 sz = min_t(u32, karg.max_sense_bytes, SCSI_SENSE_BUFFERSIZE);
 967                 if (copy_to_user(karg.sense_data_ptr,
 968                         ioc->ctl_cmds.sense, sz)) {
 969                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 970                             __LINE__, __func__);
 971                         ret = -ENODATA;
 972                         goto out;
 973                 }
 974         }
 975
 976  issue_host_reset:
 977         if (issue_reset) {
 978                 ret = -ENODATA;
 979                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 980                     mpi_request->Function ==
 981                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 982                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
 983                         printk(MPT2SAS_INFO_FMT "issue target reset: handle "
 984                             "= (0x%04x)\n", ioc->name,
 985                             le16_to_cpu(mpi_request->FunctionDependent1));
 986                         mpt2sas_halt_firmware(ioc);
 987                         mpt2sas_scsih_issue_tm(ioc,
 988                             le16_to_cpu(mpi_request->FunctionDependent1), 0, 0,
 989                             0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 10,
 990                             TM_MUTEX_ON);
 991                         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
 992                 } else
 993                         mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 994                             FORCE_BIG_HAMMER);
 995         }
 996
 997  out:
 998
 999         /* free memory associated with sg buffers */
1000         if (data_in)
1001                 pci_free_consistent(ioc->pdev, data_in_sz, data_in,
1002                     data_in_dma);
1003
1004         if (data_out)
1005                 pci_free_consistent(ioc->pdev, data_out_sz, data_out,
1006                     data_out_dma);
1007
1008         kfree(mpi_request);
1009         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1010         return ret;
1011 }
1012
1013 /**
1014  * _ctl_getiocinfo - main handler for MPT2IOCINFO opcode
1015  * @ioc: per adapter object
1016  * @arg - user space buffer containing ioctl content
1017  */
1018 static long
1019 _ctl_getiocinfo(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1020 {
1021         struct mpt2_ioctl_iocinfo karg;
1022
1023         if (copy_from_user(&karg, arg, sizeof(karg))) {
1024                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1025                     __FILE__, __LINE__, __func__);
1026                 return -EFAULT;
1027         }
1028
1029         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1030             __func__));
1031
1032         memset(&karg, 0 , sizeof(karg));
1033         if (ioc->is_warpdrive)
1034                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1035         else
1036                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1037         if (ioc->pfacts)
1038                 karg.port_number = ioc->pfacts[0].PortNumber;
1039         karg.hw_rev = ioc->pdev->revision;
1040         karg.pci_id = ioc->pdev->device;
1041         karg.subsystem_device = ioc->pdev->subsystem_device;
1042         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1043         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1044         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1045         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1046         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1047         karg.firmware_version = ioc->facts.FWVersion.Word;
1048         strcpy(karg.driver_version, MPT2SAS_DRIVER_NAME);
1049         strcat(karg.driver_version, "-");
1050         strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1051         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1052
1053         if (copy_to_user(arg, &karg, sizeof(karg))) {
1054                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1055                     __FILE__, __LINE__, __func__);
1056                 return -EFAULT;
1057         }
1058         return 0;
1059 }
1060
1061 /**
1062  * _ctl_eventquery - main handler for MPT2EVENTQUERY opcode
1063  * @ioc: per adapter object
1064  * @arg - user space buffer containing ioctl content
1065  */
1066 static long
1067 _ctl_eventquery(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1068 {
1069         struct mpt2_ioctl_eventquery karg;
1070
1071         if (copy_from_user(&karg, arg, sizeof(karg))) {
1072                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1073                     __FILE__, __LINE__, __func__);
1074                 return -EFAULT;
1075         }
1076
1077         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1078             __func__));
1079
1080         karg.event_entries = MPT2SAS_CTL_EVENT_LOG_SIZE;
1081         memcpy(karg.event_types, ioc->event_type,
1082             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1083
1084         if (copy_to_user(arg, &karg, sizeof(karg))) {
1085                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1086                     __FILE__, __LINE__, __func__);
1087                 return -EFAULT;
1088         }
1089         return 0;
1090 }
1091
1092 /**
1093  * _ctl_eventenable - main handler for MPT2EVENTENABLE opcode
1094  * @ioc: per adapter object
1095  * @arg - user space buffer containing ioctl content
1096  */
1097 static long
1098 _ctl_eventenable(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1099 {
1100         struct mpt2_ioctl_eventenable karg;
1101
1102         if (copy_from_user(&karg, arg, sizeof(karg))) {
1103                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1104                     __FILE__, __LINE__, __func__);
1105                 return -EFAULT;
1106         }
1107
1108         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1109             __func__));
1110
1111         if (ioc->event_log)
1112                 return 0;
1113         memcpy(ioc->event_type, karg.event_types,
1114             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1115         mpt2sas_base_validate_event_type(ioc, ioc->event_type);
1116
1117         /* initialize event_log */
1118         ioc->event_context = 0;
1119         ioc->aen_event_read_flag = 0;
1120         ioc->event_log = kcalloc(MPT2SAS_CTL_EVENT_LOG_SIZE,
1121             sizeof(struct MPT2_IOCTL_EVENTS), GFP_KERNEL);
1122         if (!ioc->event_log) {
1123                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1124                     __FILE__, __LINE__, __func__);
1125                 return -ENOMEM;
1126         }
1127         return 0;
1128 }
1129
1130 /**
1131  * _ctl_eventreport - main handler for MPT2EVENTREPORT opcode
1132  * @ioc: per adapter object
1133  * @arg - user space buffer containing ioctl content
1134  */
1135 static long
1136 _ctl_eventreport(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1137 {
1138         struct mpt2_ioctl_eventreport karg;
1139         u32 number_bytes, max_events, max;
1140         struct mpt2_ioctl_eventreport __user *uarg = arg;
1141
1142         if (copy_from_user(&karg, arg, sizeof(karg))) {
1143                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1144                     __FILE__, __LINE__, __func__);
1145                 return -EFAULT;
1146         }
1147
1148         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1149             __func__));
1150
1151         number_bytes = karg.hdr.max_data_size -
1152             sizeof(struct mpt2_ioctl_header);
1153         max_events = number_bytes/sizeof(struct MPT2_IOCTL_EVENTS);
1154         max = min_t(u32, MPT2SAS_CTL_EVENT_LOG_SIZE, max_events);
1155
1156         /* If fewer than 1 event is requested, there must have
1157          * been some type of error.
1158          */
1159         if (!max || !ioc->event_log)
1160                 return -ENODATA;
1161
1162         number_bytes = max * sizeof(struct MPT2_IOCTL_EVENTS);
1163         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1164                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1165                     __FILE__, __LINE__, __func__);
1166                 return -EFAULT;
1167         }
1168
1169         /* reset flag so SIGIO can restart */
1170         ioc->aen_event_read_flag = 0;
1171         return 0;
1172 }
1173
1174 /**
1175  * _ctl_do_reset - main handler for MPT2HARDRESET opcode
1176  * @ioc: per adapter object
1177  * @arg - user space buffer containing ioctl content
1178  */
1179 static long
1180 _ctl_do_reset(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1181 {
1182         struct mpt2_ioctl_diag_reset karg;
1183         int retval;
1184
1185         if (copy_from_user(&karg, arg, sizeof(karg))) {
1186                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1187                     __FILE__, __LINE__, __func__);
1188                 return -EFAULT;
1189         }
1190
1191         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1192                 ioc->is_driver_loading)
1193                 return -EAGAIN;
1194         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1195             __func__));
1196
1197         retval = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1198             FORCE_BIG_HAMMER);
1199         printk(MPT2SAS_INFO_FMT "host reset: %s\n",
1200             ioc->name, ((!retval) ? "SUCCESS" : "FAILED"));
1201         return 0;
1202 }
1203
1204 /**
1205  * _ctl_btdh_search_sas_device - searching for sas device
1206  * @ioc: per adapter object
1207  * @btdh: btdh ioctl payload
1208  */
1209 static int
1210 _ctl_btdh_search_sas_device(struct MPT2SAS_ADAPTER *ioc,
1211     struct mpt2_ioctl_btdh_mapping *btdh)
1212 {
1213         struct _sas_device *sas_device;
1214         unsigned long flags;
1215         int rc = 0;
1216
1217         if (list_empty(&ioc->sas_device_list))
1218                 return rc;
1219
1220         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1221         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1222                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1223                     btdh->handle == sas_device->handle) {
1224                         btdh->bus = sas_device->channel;
1225                         btdh->id = sas_device->id;
1226                         rc = 1;
1227                         goto out;
1228                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1229                     sas_device->id && btdh->handle == 0xFFFF) {
1230                         btdh->handle = sas_device->handle;
1231                         rc = 1;
1232                         goto out;
1233                 }
1234         }
1235  out:
1236         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1237         return rc;
1238 }
1239
1240 /**
1241  * _ctl_btdh_search_raid_device - searching for raid device
1242  * @ioc: per adapter object
1243  * @btdh: btdh ioctl payload
1244  */
1245 static int
1246 _ctl_btdh_search_raid_device(struct MPT2SAS_ADAPTER *ioc,
1247     struct mpt2_ioctl_btdh_mapping *btdh)
1248 {
1249         struct _raid_device *raid_device;
1250         unsigned long flags;
1251         int rc = 0;
1252
1253         if (list_empty(&ioc->raid_device_list))
1254                 return rc;
1255
1256         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1257         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1258                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1259                     btdh->handle == raid_device->handle) {
1260                         btdh->bus = raid_device->channel;
1261                         btdh->id = raid_device->id;
1262                         rc = 1;
1263                         goto out;
1264                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1265                     raid_device->id && btdh->handle == 0xFFFF) {
1266                         btdh->handle = raid_device->handle;
1267                         rc = 1;
1268                         goto out;
1269                 }
1270         }
1271  out:
1272         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1273         return rc;
1274 }
1275
1276 /**
1277  * _ctl_btdh_mapping - main handler for MPT2BTDHMAPPING opcode
1278  * @ioc: per adapter object
1279  * @arg - user space buffer containing ioctl content
1280  */
1281 static long
1282 _ctl_btdh_mapping(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1283 {
1284         struct mpt2_ioctl_btdh_mapping karg;
1285         int rc;
1286
1287         if (copy_from_user(&karg, arg, sizeof(karg))) {
1288                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1289                     __FILE__, __LINE__, __func__);
1290                 return -EFAULT;
1291         }
1292
1293         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1294             __func__));
1295
1296         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1297         if (!rc)
1298                 _ctl_btdh_search_raid_device(ioc, &karg);
1299
1300         if (copy_to_user(arg, &karg, sizeof(karg))) {
1301                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1302                     __FILE__, __LINE__, __func__);
1303                 return -EFAULT;
1304         }
1305         return 0;
1306 }
1307
1308 /**
1309  * _ctl_diag_capability - return diag buffer capability
1310  * @ioc: per adapter object
1311  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1312  *
1313  * returns 1 when diag buffer support is enabled in firmware
1314  */
1315 static u8
1316 _ctl_diag_capability(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type)
1317 {
1318         u8 rc = 0;
1319
1320         switch (buffer_type) {
1321         case MPI2_DIAG_BUF_TYPE_TRACE:
1322                 if (ioc->facts.IOCCapabilities &
1323                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1324                         rc = 1;
1325                 break;
1326         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1327                 if (ioc->facts.IOCCapabilities &
1328                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1329                         rc = 1;
1330                 break;
1331         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1332                 if (ioc->facts.IOCCapabilities &
1333                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1334                         rc = 1;
1335         }
1336
1337         return rc;
1338 }
1339
1340 /**
1341  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1342  * @ioc: per adapter object
1343  * @diag_register: the diag_register struct passed in from user space
1344  *
1345  */
1346 static long
1347 _ctl_diag_register_2(struct MPT2SAS_ADAPTER *ioc,
1348     struct mpt2_diag_register *diag_register)
1349 {
1350         int rc, i;
1351         void *request_data = NULL;
1352         dma_addr_t request_data_dma;
1353         u32 request_data_sz = 0;
1354         Mpi2DiagBufferPostRequest_t *mpi_request;
1355         Mpi2DiagBufferPostReply_t *mpi_reply;
1356         u8 buffer_type;
1357         unsigned long timeleft;
1358         u16 smid;
1359         u16 ioc_status;
1360         u8 issue_reset = 0;
1361
1362         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1363             __func__));
1364
1365         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1366                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1367                     ioc->name, __func__);
1368                 rc = -EAGAIN;
1369                 goto out;
1370         }
1371
1372         buffer_type = diag_register->buffer_type;
1373         if (!_ctl_diag_capability(ioc, buffer_type)) {
1374                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1375                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1376                 return -EPERM;
1377         }
1378
1379         if (ioc->diag_buffer_status[buffer_type] &
1380             MPT2_DIAG_BUFFER_IS_REGISTERED) {
1381                 printk(MPT2SAS_ERR_FMT "%s: already has a registered "
1382                     "buffer for buffer_type(0x%02x)\n", ioc->name, __func__,
1383                     buffer_type);
1384                 return -EINVAL;
1385         }
1386
1387         if (diag_register->requested_buffer_size % 4)  {
1388                 printk(MPT2SAS_ERR_FMT "%s: the requested_buffer_size "
1389                     "is not 4 byte aligned\n", ioc->name, __func__);
1390                 return -EINVAL;
1391         }
1392
1393         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1394         if (!smid) {
1395                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1396                     ioc->name, __func__);
1397                 rc = -EAGAIN;
1398                 goto out;
1399         }
1400
1401         rc = 0;
1402         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1403         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1404         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1405         ioc->ctl_cmds.smid = smid;
1406
1407         request_data = ioc->diag_buffer[buffer_type];
1408         request_data_sz = diag_register->requested_buffer_size;
1409         ioc->unique_id[buffer_type] = diag_register->unique_id;
1410         ioc->diag_buffer_status[buffer_type] = 0;
1411         memcpy(ioc->product_specific[buffer_type],
1412             diag_register->product_specific, MPT2_PRODUCT_SPECIFIC_DWORDS);
1413         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1414
1415         if (request_data) {
1416                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1417                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1418                         pci_free_consistent(ioc->pdev,
1419                             ioc->diag_buffer_sz[buffer_type],
1420                             request_data, request_data_dma);
1421                         request_data = NULL;
1422                 }
1423         }
1424
1425         if (request_data == NULL) {
1426                 ioc->diag_buffer_sz[buffer_type] = 0;
1427                 ioc->diag_buffer_dma[buffer_type] = 0;
1428                 request_data = pci_alloc_consistent(
1429                         ioc->pdev, request_data_sz, &request_data_dma);
1430                 if (request_data == NULL) {
1431                         printk(MPT2SAS_ERR_FMT "%s: failed allocating memory"
1432                             " for diag buffers, requested size(%d)\n",
1433                             ioc->name, __func__, request_data_sz);
1434                         mpt2sas_base_free_smid(ioc, smid);
1435                         return -ENOMEM;
1436                 }
1437                 ioc->diag_buffer[buffer_type] = request_data;
1438                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1439                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1440         }
1441
1442         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1443         mpi_request->BufferType = diag_register->buffer_type;
1444         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1445         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1446         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1447         mpi_request->VF_ID = 0; /* TODO */
1448         mpi_request->VP_ID = 0;
1449
1450         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(0x%p), "
1451             "dma(0x%llx), sz(%d)\n", ioc->name, __func__, request_data,
1452             (unsigned long long)request_data_dma,
1453             le32_to_cpu(mpi_request->BufferLength)));
1454
1455         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1456                 mpi_request->ProductSpecific[i] =
1457                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1458
1459         init_completion(&ioc->ctl_cmds.done);
1460         mpt2sas_base_put_smid_default(ioc, smid);
1461         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1462             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1463
1464         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1465                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1466                     __func__);
1467                 _debug_dump_mf(mpi_request,
1468                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
1469                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1470                         issue_reset = 1;
1471                 goto issue_host_reset;
1472         }
1473
1474         /* process the completed Reply Message Frame */
1475         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1476                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1477                     ioc->name, __func__);
1478                 rc = -EFAULT;
1479                 goto out;
1480         }
1481
1482         mpi_reply = ioc->ctl_cmds.reply;
1483         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1484
1485         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1486                 ioc->diag_buffer_status[buffer_type] |=
1487                         MPT2_DIAG_BUFFER_IS_REGISTERED;
1488                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1489                     ioc->name, __func__));
1490         } else {
1491                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1492                     "log_info(0x%08x)\n", ioc->name, __func__,
1493                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1494                 rc = -EFAULT;
1495         }
1496
1497  issue_host_reset:
1498         if (issue_reset)
1499                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1500                     FORCE_BIG_HAMMER);
1501
1502  out:
1503
1504         if (rc && request_data)
1505                 pci_free_consistent(ioc->pdev, request_data_sz,
1506                     request_data, request_data_dma);
1507
1508         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1509         return rc;
1510 }
1511
1512 /**
1513  * mpt2sas_enable_diag_buffer - enabling diag_buffers support driver load time
1514  * @ioc: per adapter object
1515  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1516  *
1517  * This is called when command line option diag_buffer_enable is enabled
1518  * at driver load time.
1519  */
1520 void
1521 mpt2sas_enable_diag_buffer(struct MPT2SAS_ADAPTER *ioc, u8 bits_to_register)
1522 {
1523         struct mpt2_diag_register diag_register;
1524
1525         memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
1526
1527         if (bits_to_register & 1) {
1528                 printk(MPT2SAS_INFO_FMT "registering trace buffer support\n",
1529                     ioc->name);
1530                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1531                 /* register for 1MB buffers  */
1532                 diag_register.requested_buffer_size = (1024 * 1024);
1533                 diag_register.unique_id = 0x7075900;
1534                 _ctl_diag_register_2(ioc,  &diag_register);
1535         }
1536
1537         if (bits_to_register & 2) {
1538                 printk(MPT2SAS_INFO_FMT "registering snapshot buffer support\n",
1539                     ioc->name);
1540                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1541                 /* register for 2MB buffers  */
1542                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1543                 diag_register.unique_id = 0x7075901;
1544                 _ctl_diag_register_2(ioc,  &diag_register);
1545         }
1546
1547         if (bits_to_register & 4) {
1548                 printk(MPT2SAS_INFO_FMT "registering extended buffer support\n",
1549                     ioc->name);
1550                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1551                 /* register for 2MB buffers  */
1552                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1553                 diag_register.unique_id = 0x7075901;
1554                 _ctl_diag_register_2(ioc,  &diag_register);
1555         }
1556 }
1557
1558 /**
1559  * _ctl_diag_register - application register with driver
1560  * @ioc: per adapter object
1561  * @arg - user space buffer containing ioctl content
1562  *
1563  * This will allow the driver to setup any required buffers that will be
1564  * needed by firmware to communicate with the driver.
1565  */
1566 static long
1567 _ctl_diag_register(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1568 {
1569         struct mpt2_diag_register karg;
1570         long rc;
1571
1572         if (copy_from_user(&karg, arg, sizeof(karg))) {
1573                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1574                     __FILE__, __LINE__, __func__);
1575                 return -EFAULT;
1576         }
1577
1578         rc = _ctl_diag_register_2(ioc, &karg);
1579         return rc;
1580 }
1581
1582 /**
1583  * _ctl_diag_unregister - application unregister with driver
1584  * @ioc: per adapter object
1585  * @arg - user space buffer containing ioctl content
1586  *
1587  * This will allow the driver to cleanup any memory allocated for diag
1588  * messages and to free up any resources.
1589  */
1590 static long
1591 _ctl_diag_unregister(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1592 {
1593         struct mpt2_diag_unregister karg;
1594         void *request_data;
1595         dma_addr_t request_data_dma;
1596         u32 request_data_sz;
1597         u8 buffer_type;
1598
1599         if (copy_from_user(&karg, arg, sizeof(karg))) {
1600                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1601                     __FILE__, __LINE__, __func__);
1602                 return -EFAULT;
1603         }
1604
1605         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1606             __func__));
1607
1608         buffer_type = karg.unique_id & 0x000000ff;
1609         if (!_ctl_diag_capability(ioc, buffer_type)) {
1610                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1611                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1612                 return -EPERM;
1613         }
1614
1615         if ((ioc->diag_buffer_status[buffer_type] &
1616             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1617                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1618                     "registered\n", ioc->name, __func__, buffer_type);
1619                 return -EINVAL;
1620         }
1621         if ((ioc->diag_buffer_status[buffer_type] &
1622             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
1623                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) has not been "
1624                     "released\n", ioc->name, __func__, buffer_type);
1625                 return -EINVAL;
1626         }
1627
1628         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1629                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1630                     "registered\n", ioc->name, __func__, karg.unique_id);
1631                 return -EINVAL;
1632         }
1633
1634         request_data = ioc->diag_buffer[buffer_type];
1635         if (!request_data) {
1636                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1637                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1638                 return -ENOMEM;
1639         }
1640
1641         request_data_sz = ioc->diag_buffer_sz[buffer_type];
1642         request_data_dma = ioc->diag_buffer_dma[buffer_type];
1643         pci_free_consistent(ioc->pdev, request_data_sz,
1644             request_data, request_data_dma);
1645         ioc->diag_buffer[buffer_type] = NULL;
1646         ioc->diag_buffer_status[buffer_type] = 0;
1647         return 0;
1648 }
1649
1650 /**
1651  * _ctl_diag_query - query relevant info associated with diag buffers
1652  * @ioc: per adapter object
1653  * @arg - user space buffer containing ioctl content
1654  *
1655  * The application will send only buffer_type and unique_id.  Driver will
1656  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
1657  * 0x00, the driver will return info specified by Buffer Type.
1658  */
1659 static long
1660 _ctl_diag_query(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1661 {
1662         struct mpt2_diag_query karg;
1663         void *request_data;
1664         int i;
1665         u8 buffer_type;
1666
1667         if (copy_from_user(&karg, arg, sizeof(karg))) {
1668                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1669                     __FILE__, __LINE__, __func__);
1670                 return -EFAULT;
1671         }
1672
1673         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1674             __func__));
1675
1676         karg.application_flags = 0;
1677         buffer_type = karg.buffer_type;
1678
1679         if (!_ctl_diag_capability(ioc, buffer_type)) {
1680                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1681                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1682                 return -EPERM;
1683         }
1684
1685         if ((ioc->diag_buffer_status[buffer_type] &
1686             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1687                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1688                     "registered\n", ioc->name, __func__, buffer_type);
1689                 return -EINVAL;
1690         }
1691
1692         if (karg.unique_id & 0xffffff00) {
1693                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
1694                         printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1695                             "registered\n", ioc->name, __func__,
1696                             karg.unique_id);
1697                         return -EINVAL;
1698                 }
1699         }
1700
1701         request_data = ioc->diag_buffer[buffer_type];
1702         if (!request_data) {
1703                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1704                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1705                 return -ENOMEM;
1706         }
1707
1708         if (ioc->diag_buffer_status[buffer_type] & MPT2_DIAG_BUFFER_IS_RELEASED)
1709                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1710                     MPT2_APP_FLAGS_BUFFER_VALID);
1711         else
1712                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1713                     MPT2_APP_FLAGS_BUFFER_VALID |
1714                     MPT2_APP_FLAGS_FW_BUFFER_ACCESS);
1715
1716         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1717                 karg.product_specific[i] =
1718                     ioc->product_specific[buffer_type][i];
1719
1720         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
1721         karg.driver_added_buffer_size = 0;
1722         karg.unique_id = ioc->unique_id[buffer_type];
1723         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
1724
1725         if (copy_to_user(arg, &karg, sizeof(struct mpt2_diag_query))) {
1726                 printk(MPT2SAS_ERR_FMT "%s: unable to write mpt2_diag_query "
1727                     "data @ %p\n", ioc->name, __func__, arg);
1728                 return -EFAULT;
1729         }
1730         return 0;
1731 }
1732
1733 /**
1734  * _ctl_send_release - Diag Release Message
1735  * @ioc: per adapter object
1736  * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
1737  * @issue_reset - specifies whether host reset is required.
1738  *
1739  */
1740 static int
1741 _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type, u8 *issue_reset)
1742 {
1743         Mpi2DiagReleaseRequest_t *mpi_request;
1744         Mpi2DiagReleaseReply_t *mpi_reply;
1745         u16 smid;
1746         u16 ioc_status;
1747         u32 ioc_state;
1748         int rc;
1749         unsigned long timeleft;
1750
1751         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1752             __func__));
1753
1754         rc = 0;
1755         *issue_reset = 0;
1756
1757         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1758         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1759                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
1760                     "skipping due to FAULT state\n", ioc->name,
1761                     __func__));
1762                 rc = -EAGAIN;
1763                 goto out;
1764         }
1765
1766         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1767                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1768                     ioc->name, __func__);
1769                 rc = -EAGAIN;
1770                 goto out;
1771         }
1772
1773         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1774         if (!smid) {
1775                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1776                     ioc->name, __func__);
1777                 rc = -EAGAIN;
1778                 goto out;
1779         }
1780
1781         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1782         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1783         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1784         ioc->ctl_cmds.smid = smid;
1785
1786         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
1787         mpi_request->BufferType = buffer_type;
1788         mpi_request->VF_ID = 0; /* TODO */
1789         mpi_request->VP_ID = 0;
1790
1791         init_completion(&ioc->ctl_cmds.done);
1792         mpt2sas_base_put_smid_default(ioc, smid);
1793         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1794             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1795
1796         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1797                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1798                     __func__);
1799                 _debug_dump_mf(mpi_request,
1800                     sizeof(Mpi2DiagReleaseRequest_t)/4);
1801                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1802                         *issue_reset = 1;
1803                 rc = -EFAULT;
1804                 goto out;
1805         }
1806
1807         /* process the completed Reply Message Frame */
1808         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1809                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1810                     ioc->name, __func__);
1811                 rc = -EFAULT;
1812                 goto out;
1813         }
1814
1815         mpi_reply = ioc->ctl_cmds.reply;
1816         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1817
1818         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1819                 ioc->diag_buffer_status[buffer_type] |=
1820                     MPT2_DIAG_BUFFER_IS_RELEASED;
1821                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1822                     ioc->name, __func__));
1823         } else {
1824                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1825                     "log_info(0x%08x)\n", ioc->name, __func__,
1826                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1827                 rc = -EFAULT;
1828         }
1829
1830  out:
1831         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1832         return rc;
1833 }
1834
1835 /**
1836  * _ctl_diag_release - request to send Diag Release Message to firmware
1837  * @arg - user space buffer containing ioctl content
1838  *
1839  * This allows ownership of the specified buffer to returned to the driver,
1840  * allowing an application to read the buffer without fear that firmware is
1841  * overwritting information in the buffer.
1842  */
1843 static long
1844 _ctl_diag_release(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1845 {
1846         struct mpt2_diag_release karg;
1847         void *request_data;
1848         int rc;
1849         u8 buffer_type;
1850         u8 issue_reset = 0;
1851
1852         if (copy_from_user(&karg, arg, sizeof(karg))) {
1853                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1854                     __FILE__, __LINE__, __func__);
1855                 return -EFAULT;
1856         }
1857
1858         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1859             __func__));
1860
1861         buffer_type = karg.unique_id & 0x000000ff;
1862         if (!_ctl_diag_capability(ioc, buffer_type)) {
1863                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1864                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1865                 return -EPERM;
1866         }
1867
1868         if ((ioc->diag_buffer_status[buffer_type] &
1869             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1870                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1871                     "registered\n", ioc->name, __func__, buffer_type);
1872                 return -EINVAL;
1873         }
1874
1875         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1876                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1877                     "registered\n", ioc->name, __func__, karg.unique_id);
1878                 return -EINVAL;
1879         }
1880
1881         if (ioc->diag_buffer_status[buffer_type] &
1882             MPT2_DIAG_BUFFER_IS_RELEASED) {
1883                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1884                     "is already released\n", ioc->name, __func__,
1885                     buffer_type);
1886                 return 0;
1887         }
1888
1889         request_data = ioc->diag_buffer[buffer_type];
1890
1891         if (!request_data) {
1892                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1893                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1894                 return -ENOMEM;
1895         }
1896
1897         /* buffers were released by due to host reset */
1898         if ((ioc->diag_buffer_status[buffer_type] &
1899             MPT2_DIAG_BUFFER_IS_DIAG_RESET)) {
1900                 ioc->diag_buffer_status[buffer_type] |=
1901                     MPT2_DIAG_BUFFER_IS_RELEASED;
1902                 ioc->diag_buffer_status[buffer_type] &=
1903                     ~MPT2_DIAG_BUFFER_IS_DIAG_RESET;
1904                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1905                     "was released due to host reset\n", ioc->name, __func__,
1906                     buffer_type);
1907                 return 0;
1908         }
1909
1910         rc = _ctl_send_release(ioc, buffer_type, &issue_reset);
1911
1912         if (issue_reset)
1913                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1914                     FORCE_BIG_HAMMER);
1915
1916         return rc;
1917 }
1918
1919 /**
1920  * _ctl_diag_read_buffer - request for copy of the diag buffer
1921  * @ioc: per adapter object
1922  * @arg - user space buffer containing ioctl content
1923  */
1924 static long
1925 _ctl_diag_read_buffer(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1926 {
1927         struct mpt2_diag_read_buffer karg;
1928         struct mpt2_diag_read_buffer __user *uarg = arg;
1929         void *request_data, *diag_data;
1930         Mpi2DiagBufferPostRequest_t *mpi_request;
1931         Mpi2DiagBufferPostReply_t *mpi_reply;
1932         int rc, i;
1933         u8 buffer_type;
1934         unsigned long timeleft, request_size, copy_size;
1935         u16 smid;
1936         u16 ioc_status;
1937         u8 issue_reset = 0;
1938
1939         if (copy_from_user(&karg, arg, sizeof(karg))) {
1940                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1941                     __FILE__, __LINE__, __func__);
1942                 return -EFAULT;
1943         }
1944
1945         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1946             __func__));
1947
1948         buffer_type = karg.unique_id & 0x000000ff;
1949         if (!_ctl_diag_capability(ioc, buffer_type)) {
1950                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1951                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1952                 return -EPERM;
1953         }
1954
1955         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1956                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1957                     "registered\n", ioc->name, __func__, karg.unique_id);
1958                 return -EINVAL;
1959         }
1960
1961         request_data = ioc->diag_buffer[buffer_type];
1962         if (!request_data) {
1963                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1964                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1965                 return -ENOMEM;
1966         }
1967
1968         request_size = ioc->diag_buffer_sz[buffer_type];
1969
1970         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
1971                 printk(MPT2SAS_ERR_FMT "%s: either the starting_offset "
1972                     "or bytes_to_read are not 4 byte aligned\n", ioc->name,
1973                     __func__);
1974                 return -EINVAL;
1975         }
1976
1977         if (karg.starting_offset > request_size)
1978                 return -EINVAL;
1979
1980         diag_data = (void *)(request_data + karg.starting_offset);
1981         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(%p), "
1982             "offset(%d), sz(%d)\n", ioc->name, __func__,
1983             diag_data, karg.starting_offset, karg.bytes_to_read));
1984
1985         /* Truncate data on requests that are too large */
1986         if ((diag_data + karg.bytes_to_read < diag_data) ||
1987             (diag_data + karg.bytes_to_read > request_data + request_size))
1988                 copy_size = request_size - karg.starting_offset;
1989         else
1990                 copy_size = karg.bytes_to_read;
1991
1992         if (copy_to_user((void __user *)uarg->diagnostic_data,
1993             diag_data, copy_size)) {
1994                 printk(MPT2SAS_ERR_FMT "%s: Unable to write "
1995                     "mpt_diag_read_buffer_t data @ %p\n", ioc->name,
1996                     __func__, diag_data);
1997                 return -EFAULT;
1998         }
1999
2000         if ((karg.flags & MPT2_FLAGS_REREGISTER) == 0)
2001                 return 0;
2002
2003         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: Reregister "
2004                 "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type));
2005         if ((ioc->diag_buffer_status[buffer_type] &
2006             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
2007                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2008                     "buffer_type(0x%02x) is still registered\n", ioc->name,
2009                      __func__, buffer_type));
2010                 return 0;
2011         }
2012         /* Get a free request frame and save the message context.
2013         */
2014
2015         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
2016                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
2017                     ioc->name, __func__);
2018                 rc = -EAGAIN;
2019                 goto out;
2020         }
2021
2022         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2023         if (!smid) {
2024                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2025                     ioc->name, __func__);
2026                 rc = -EAGAIN;
2027                 goto out;
2028         }
2029
2030         rc = 0;
2031         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
2032         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2033         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2034         ioc->ctl_cmds.smid = smid;
2035
2036         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2037         mpi_request->BufferType = buffer_type;
2038         mpi_request->BufferLength =
2039             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2040         mpi_request->BufferAddress =
2041             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2042         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
2043                 mpi_request->ProductSpecific[i] =
2044                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2045         mpi_request->VF_ID = 0; /* TODO */
2046         mpi_request->VP_ID = 0;
2047
2048         init_completion(&ioc->ctl_cmds.done);
2049         mpt2sas_base_put_smid_default(ioc, smid);
2050         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
2051             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
2052
2053         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
2054                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
2055                     __func__);
2056                 _debug_dump_mf(mpi_request,
2057                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
2058                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
2059                         issue_reset = 1;
2060                 goto issue_host_reset;
2061         }
2062
2063         /* process the completed Reply Message Frame */
2064         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
2065                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
2066                     ioc->name, __func__);
2067                 rc = -EFAULT;
2068                 goto out;
2069         }
2070
2071         mpi_reply = ioc->ctl_cmds.reply;
2072         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2073
2074         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2075                 ioc->diag_buffer_status[buffer_type] |=
2076                     MPT2_DIAG_BUFFER_IS_REGISTERED;
2077                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
2078                     ioc->name, __func__));
2079         } else {
2080                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
2081                     "log_info(0x%08x)\n", ioc->name, __func__,
2082                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2083                 rc = -EFAULT;
2084         }
2085
2086  issue_host_reset:
2087         if (issue_reset)
2088                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2089                     FORCE_BIG_HAMMER);
2090
2091  out:
2092
2093         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
2094         return rc;
2095 }
2096
2097
2098 #ifdef CONFIG_COMPAT
2099 /**
2100  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2101  * @ioc: per adapter object
2102  * @cmd - ioctl opcode
2103  * @arg - (struct mpt2_ioctl_command32)
2104  *
2105  * MPT2COMMAND32 - Handle 32bit applications running on 64bit os.
2106  */
2107 static long
2108 _ctl_compat_mpt_command(struct MPT2SAS_ADAPTER *ioc, unsigned cmd,
2109         void __user *arg)
2110 {
2111         struct mpt2_ioctl_command32 karg32;
2112         struct mpt2_ioctl_command32 __user *uarg;
2113         struct mpt2_ioctl_command karg;
2114
2115         if (_IOC_SIZE(cmd) != sizeof(struct mpt2_ioctl_command32))
2116                 return -EINVAL;
2117
2118         uarg = (struct mpt2_ioctl_command32 __user *) arg;
2119
2120         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2121                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2122                     __FILE__, __LINE__, __func__);
2123                 return -EFAULT;
2124         }
2125
2126         memset(&karg, 0, sizeof(struct mpt2_ioctl_command));
2127         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2128         karg.hdr.port_number = karg32.hdr.port_number;
2129         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2130         karg.timeout = karg32.timeout;
2131         karg.max_reply_bytes = karg32.max_reply_bytes;
2132         karg.data_in_size = karg32.data_in_size;
2133         karg.data_out_size = karg32.data_out_size;
2134         karg.max_sense_bytes = karg32.max_sense_bytes;
2135         karg.data_sge_offset = karg32.data_sge_offset;
2136         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2137         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2138         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2139         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2140         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2141 }
2142 #endif
2143
2144 /**
2145  * _ctl_ioctl_main - main ioctl entry point
2146  * @file - (struct file)
2147  * @cmd - ioctl opcode
2148  * @arg -
2149  * compat - handles 32 bit applications in 64bit os
2150  */
2151 static long
2152 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2153         u8 compat)
2154 {
2155         struct MPT2SAS_ADAPTER *ioc;
2156         struct mpt2_ioctl_header ioctl_header;
2157         enum block_state state;
2158         long ret = -EINVAL;
2159
2160         /* get IOCTL header */
2161         if (copy_from_user(&ioctl_header, (char __user *)arg,
2162             sizeof(struct mpt2_ioctl_header))) {
2163                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2164                     __FILE__, __LINE__, __func__);
2165                 return -EFAULT;
2166         }
2167
2168         if (_ctl_verify_adapter(ioctl_header.ioc_number, &ioc) == -1 || !ioc)
2169                 return -ENODEV;
2170         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2171             ioc->is_driver_loading)
2172                 return -EAGAIN;
2173
2174         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2175         if (state == NON_BLOCKING) {
2176                 if (!mutex_trylock(&ioc->ctl_cmds.mutex))
2177                         return -EAGAIN;
2178         } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2179                 return -ERESTARTSYS;
2180         }
2181
2182         switch (cmd) {
2183         case MPT2IOCINFO:
2184                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_iocinfo))
2185                         ret = _ctl_getiocinfo(ioc, arg);
2186                 break;
2187 #ifdef CONFIG_COMPAT
2188         case MPT2COMMAND32:
2189 #endif
2190         case MPT2COMMAND:
2191         {
2192                 struct mpt2_ioctl_command __user *uarg;
2193                 struct mpt2_ioctl_command karg;
2194 #ifdef CONFIG_COMPAT
2195                 if (compat) {
2196                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2197                         break;
2198                 }
2199 #endif
2200                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2201                         printk(KERN_ERR "failure at %s:%d/%s()!\n",
2202                             __FILE__, __LINE__, __func__);
2203                         ret = -EFAULT;
2204                         break;
2205                 }
2206
2207                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_command)) {
2208                         uarg = arg;
2209                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2210                 }
2211                 break;
2212         }
2213         case MPT2EVENTQUERY:
2214                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventquery))
2215                         ret = _ctl_eventquery(ioc, arg);
2216                 break;
2217         case MPT2EVENTENABLE:
2218                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventenable))
2219                         ret = _ctl_eventenable(ioc, arg);
2220                 break;
2221         case MPT2EVENTREPORT:
2222                 ret = _ctl_eventreport(ioc, arg);
2223                 break;
2224         case MPT2HARDRESET:
2225                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_diag_reset))
2226                         ret = _ctl_do_reset(ioc, arg);
2227                 break;
2228         case MPT2BTDHMAPPING:
2229                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_btdh_mapping))
2230                         ret = _ctl_btdh_mapping(ioc, arg);
2231                 break;
2232         case MPT2DIAGREGISTER:
2233                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_register))
2234                         ret = _ctl_diag_register(ioc, arg);
2235                 break;
2236         case MPT2DIAGUNREGISTER:
2237                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_unregister))
2238                         ret = _ctl_diag_unregister(ioc, arg);
2239                 break;
2240         case MPT2DIAGQUERY:
2241                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_query))
2242                         ret = _ctl_diag_query(ioc, arg);
2243                 break;
2244         case MPT2DIAGRELEASE:
2245                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_release))
2246                         ret = _ctl_diag_release(ioc, arg);
2247                 break;
2248         case MPT2DIAGREADBUFFER:
2249                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_read_buffer))
2250                         ret = _ctl_diag_read_buffer(ioc, arg);
2251                 break;
2252         default:
2253
2254                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT
2255                     "unsupported ioctl opcode(0x%08x)\n", ioc->name, cmd));
2256                 break;
2257         }
2258
2259         mutex_unlock(&ioc->ctl_cmds.mutex);
2260         return ret;
2261 }
2262
2263 /**
2264  * _ctl_ioctl - main ioctl entry point (unlocked)
2265  * @file - (struct file)
2266  * @cmd - ioctl opcode
2267  * @arg -
2268  */
2269 static long
2270 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2271 {
2272         long ret;
2273
2274         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0);
2275         return ret;
2276 }
2277 #ifdef CONFIG_COMPAT
2278 /**
2279  * _ctl_ioctl_compat - main ioctl entry point (compat)
2280  * @file -
2281  * @cmd -
2282  * @arg -
2283  *
2284  * This routine handles 32 bit applications in 64bit os.
2285  */
2286 static long
2287 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2288 {
2289         long ret;
2290
2291         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1);
2292         return ret;
2293 }
2294 #endif
2295
2296 /* scsi host attributes */
2297
2298 /**
2299  * _ctl_version_fw_show - firmware version
2300  * @cdev - pointer to embedded class device
2301  * @buf - the buffer returned
2302  *
2303  * A sysfs 'read-only' shost attribute.
2304  */
2305 static ssize_t
2306 _ctl_version_fw_show(struct device *cdev, struct device_attribute *attr,
2307     char *buf)
2308 {
2309         struct Scsi_Host *shost = class_to_shost(cdev);
2310         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2311
2312         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2313             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2314             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2315             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2316             ioc->facts.FWVersion.Word & 0x000000FF);
2317 }
2318 static DEVICE_ATTR(version_fw, S_IRUGO, _ctl_version_fw_show, NULL);
2319
2320 /**
2321  * _ctl_version_bios_show - bios version
2322  * @cdev - pointer to embedded class device
2323  * @buf - the buffer returned
2324  *
2325  * A sysfs 'read-only' shost attribute.
2326  */
2327 static ssize_t
2328 _ctl_version_bios_show(struct device *cdev, struct device_attribute *attr,
2329     char *buf)
2330 {
2331         struct Scsi_Host *shost = class_to_shost(cdev);
2332         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2333
2334         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2335
2336         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2337             (version & 0xFF000000) >> 24,
2338             (version & 0x00FF0000) >> 16,
2339             (version & 0x0000FF00) >> 8,
2340             version & 0x000000FF);
2341 }
2342 static DEVICE_ATTR(version_bios, S_IRUGO, _ctl_version_bios_show, NULL);
2343
2344 /**
2345  * _ctl_version_mpi_show - MPI (message passing interface) version
2346  * @cdev - pointer to embedded class device
2347  * @buf - the buffer returned
2348  *
2349  * A sysfs 'read-only' shost attribute.
2350  */
2351 static ssize_t
2352 _ctl_version_mpi_show(struct device *cdev, struct device_attribute *attr,
2353     char *buf)
2354 {
2355         struct Scsi_Host *shost = class_to_shost(cdev);
2356         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2357
2358         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2359             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2360 }
2361 static DEVICE_ATTR(version_mpi, S_IRUGO, _ctl_version_mpi_show, NULL);
2362
2363 /**
2364  * _ctl_version_product_show - product name
2365  * @cdev - pointer to embedded class device
2366  * @buf - the buffer returned
2367  *
2368  * A sysfs 'read-only' shost attribute.
2369  */
2370 static ssize_t
2371 _ctl_version_product_show(struct device *cdev, struct device_attribute *attr,
2372     char *buf)
2373 {
2374         struct Scsi_Host *shost = class_to_shost(cdev);
2375         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2376
2377         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2378 }
2379 static DEVICE_ATTR(version_product, S_IRUGO,
2380    _ctl_version_product_show, NULL);
2381
2382 /**
2383  * _ctl_version_nvdata_persistent_show - ndvata persistent version
2384  * @cdev - pointer to embedded class device
2385  * @buf - the buffer returned
2386  *
2387  * A sysfs 'read-only' shost attribute.
2388  */
2389 static ssize_t
2390 _ctl_version_nvdata_persistent_show(struct device *cdev,
2391     struct device_attribute *attr, char *buf)
2392 {
2393         struct Scsi_Host *shost = class_to_shost(cdev);
2394         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2395
2396         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2397             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2398 }
2399 static DEVICE_ATTR(version_nvdata_persistent, S_IRUGO,
2400     _ctl_version_nvdata_persistent_show, NULL);
2401
2402 /**
2403  * _ctl_version_nvdata_default_show - nvdata default version
2404  * @cdev - pointer to embedded class device
2405  * @buf - the buffer returned
2406  *
2407  * A sysfs 'read-only' shost attribute.
2408  */
2409 static ssize_t
2410 _ctl_version_nvdata_default_show(struct device *cdev,
2411     struct device_attribute *attr, char *buf)
2412 {
2413         struct Scsi_Host *shost = class_to_shost(cdev);
2414         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2415
2416         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2417             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2418 }
2419 static DEVICE_ATTR(version_nvdata_default, S_IRUGO,
2420     _ctl_version_nvdata_default_show, NULL);
2421
2422 /**
2423  * _ctl_board_name_show - board name
2424  * @cdev - pointer to embedded class device
2425  * @buf - the buffer returned
2426  *
2427  * A sysfs 'read-only' shost attribute.
2428  */
2429 static ssize_t
2430 _ctl_board_name_show(struct device *cdev, struct device_attribute *attr,
2431     char *buf)
2432 {
2433         struct Scsi_Host *shost = class_to_shost(cdev);
2434         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2435
2436         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2437 }
2438 static DEVICE_ATTR(board_name, S_IRUGO, _ctl_board_name_show, NULL);
2439
2440 /**
2441  * _ctl_board_assembly_show - board assembly name
2442  * @cdev - pointer to embedded class device
2443  * @buf - the buffer returned
2444  *
2445  * A sysfs 'read-only' shost attribute.
2446  */
2447 static ssize_t
2448 _ctl_board_assembly_show(struct device *cdev, struct device_attribute *attr,
2449     char *buf)
2450 {
2451         struct Scsi_Host *shost = class_to_shost(cdev);
2452         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2453
2454         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2455 }
2456 static DEVICE_ATTR(board_assembly, S_IRUGO,
2457     _ctl_board_assembly_show, NULL);
2458
2459 /**
2460  * _ctl_board_tracer_show - board tracer number
2461  * @cdev - pointer to embedded class device
2462  * @buf - the buffer returned
2463  *
2464  * A sysfs 'read-only' shost attribute.
2465  */
2466 static ssize_t
2467 _ctl_board_tracer_show(struct device *cdev, struct device_attribute *attr,
2468     char *buf)
2469 {
2470         struct Scsi_Host *shost = class_to_shost(cdev);
2471         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2472
2473         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2474 }
2475 static DEVICE_ATTR(board_tracer, S_IRUGO,
2476     _ctl_board_tracer_show, NULL);
2477
2478 /**
2479  * _ctl_io_delay_show - io missing delay
2480  * @cdev - pointer to embedded class device
2481  * @buf - the buffer returned
2482  *
2483  * This is for firmware implemention for deboucing device
2484  * removal events.
2485  *
2486  * A sysfs 'read-only' shost attribute.
2487  */
2488 static ssize_t
2489 _ctl_io_delay_show(struct device *cdev, struct device_attribute *attr,
2490     char *buf)
2491 {
2492         struct Scsi_Host *shost = class_to_shost(cdev);
2493         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2494
2495         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
2496 }
2497 static DEVICE_ATTR(io_delay, S_IRUGO,
2498     _ctl_io_delay_show, NULL);
2499
2500 /**
2501  * _ctl_device_delay_show - device missing delay
2502  * @cdev - pointer to embedded class device
2503  * @buf - the buffer returned
2504  *
2505  * This is for firmware implemention for deboucing device
2506  * removal events.
2507  *
2508  * A sysfs 'read-only' shost attribute.
2509  */
2510 static ssize_t
2511 _ctl_device_delay_show(struct device *cdev, struct device_attribute *attr,
2512     char *buf)
2513 {
2514         struct Scsi_Host *shost = class_to_shost(cdev);
2515         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2516
2517         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
2518 }
2519 static DEVICE_ATTR(device_delay, S_IRUGO,
2520     _ctl_device_delay_show, NULL);
2521
2522 /**
2523  * _ctl_fw_queue_depth_show - global credits
2524  * @cdev - pointer to embedded class device
2525  * @buf - the buffer returned
2526  *
2527  * This is firmware queue depth limit
2528  *
2529  * A sysfs 'read-only' shost attribute.
2530  */
2531 static ssize_t
2532 _ctl_fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
2533     char *buf)
2534 {
2535         struct Scsi_Host *shost = class_to_shost(cdev);
2536         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2537
2538         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
2539 }
2540 static DEVICE_ATTR(fw_queue_depth, S_IRUGO,
2541     _ctl_fw_queue_depth_show, NULL);
2542
2543 /**
2544  * _ctl_sas_address_show - sas address
2545  * @cdev - pointer to embedded class device
2546  * @buf - the buffer returned
2547  *
2548  * This is the controller sas address
2549  *
2550  * A sysfs 'read-only' shost attribute.
2551  */
2552 static ssize_t
2553 _ctl_host_sas_address_show(struct device *cdev, struct device_attribute *attr,
2554     char *buf)
2555 {
2556         struct Scsi_Host *shost = class_to_shost(cdev);
2557         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2558
2559         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2560             (unsigned long long)ioc->sas_hba.sas_address);
2561 }
2562 static DEVICE_ATTR(host_sas_address, S_IRUGO,
2563     _ctl_host_sas_address_show, NULL);
2564
2565 /**
2566  * _ctl_logging_level_show - logging level
2567  * @cdev - pointer to embedded class device
2568  * @buf - the buffer returned
2569  *
2570  * A sysfs 'read/write' shost attribute.
2571  */
2572 static ssize_t
2573 _ctl_logging_level_show(struct device *cdev, struct device_attribute *attr,
2574     char *buf)
2575 {
2576         struct Scsi_Host *shost = class_to_shost(cdev);
2577         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2578
2579         return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
2580 }
2581 static ssize_t
2582 _ctl_logging_level_store(struct device *cdev, struct device_attribute *attr,
2583     const char *buf, size_t count)
2584 {
2585         struct Scsi_Host *shost = class_to_shost(cdev);
2586         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2587         int val = 0;
2588
2589         if (sscanf(buf, "%x", &val) != 1)
2590                 return -EINVAL;
2591
2592         ioc->logging_level = val;
2593         printk(MPT2SAS_INFO_FMT "logging_level=%08xh\n", ioc->name,
2594             ioc->logging_level);
2595         return strlen(buf);
2596 }
2597 static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR,
2598     _ctl_logging_level_show, _ctl_logging_level_store);
2599
2600 /* device attributes */
2601 /*
2602  * _ctl_fwfault_debug_show - show/store fwfault_debug
2603  * @cdev - pointer to embedded class device
2604  * @buf - the buffer returned
2605  *
2606  * mpt2sas_fwfault_debug is command line option
2607  * A sysfs 'read/write' shost attribute.
2608  */
2609 static ssize_t
2610 _ctl_fwfault_debug_show(struct device *cdev,
2611     struct device_attribute *attr, char *buf)
2612 {
2613         struct Scsi_Host *shost = class_to_shost(cdev);
2614         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2615
2616         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
2617 }
2618 static ssize_t
2619 _ctl_fwfault_debug_store(struct device *cdev,
2620     struct device_attribute *attr, const char *buf, size_t count)
2621 {
2622         struct Scsi_Host *shost = class_to_shost(cdev);
2623         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2624         int val = 0;
2625
2626         if (sscanf(buf, "%d", &val) != 1)
2627                 return -EINVAL;
2628
2629         ioc->fwfault_debug = val;
2630         printk(MPT2SAS_INFO_FMT "fwfault_debug=%d\n", ioc->name,
2631             ioc->fwfault_debug);
2632         return strlen(buf);
2633 }
2634 static DEVICE_ATTR(fwfault_debug, S_IRUGO | S_IWUSR,
2635     _ctl_fwfault_debug_show, _ctl_fwfault_debug_store);
2636
2637
2638 /**
2639  * _ctl_ioc_reset_count_show - ioc reset count
2640  * @cdev - pointer to embedded class device
2641  * @buf - the buffer returned
2642  *
2643  * This is firmware queue depth limit
2644  *
2645  * A sysfs 'read-only' shost attribute.
2646  */
2647 static ssize_t
2648 _ctl_ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
2649     char *buf)
2650 {
2651         struct Scsi_Host *shost = class_to_shost(cdev);
2652         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2653
2654         return snprintf(buf, PAGE_SIZE, "%08d\n", ioc->ioc_reset_count);
2655 }
2656 static DEVICE_ATTR(ioc_reset_count, S_IRUGO,
2657     _ctl_ioc_reset_count_show, NULL);
2658
2659 /**
2660  * _ctl_ioc_reply_queue_count_show - number of reply queues
2661  * @cdev - pointer to embedded class device
2662  * @buf - the buffer returned
2663  *
2664  * This is number of reply queues
2665  *
2666  * A sysfs 'read-only' shost attribute.
2667  */
2668 static ssize_t
2669 _ctl_ioc_reply_queue_count_show(struct device *cdev,
2670          struct device_attribute *attr, char *buf)
2671 {
2672         u8 reply_queue_count;
2673         struct Scsi_Host *shost = class_to_shost(cdev);
2674         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2675
2676         if ((ioc->facts.IOCCapabilities &
2677             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
2678                 reply_queue_count = ioc->reply_queue_count;
2679         else
2680                 reply_queue_count = 1;
2681         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
2682 }
2683 static DEVICE_ATTR(reply_queue_count, S_IRUGO,
2684          _ctl_ioc_reply_queue_count_show, NULL);
2685
2686 /**
2687  * _ctl_BRM_status_show - Backup Rail Monitor Status
2688  * @cdev - pointer to embedded class device
2689  * @buf - the buffer returned
2690  *
2691  * This is number of reply queues
2692  *
2693  * A sysfs 'read-only' shost attribute.
2694  */
2695 static ssize_t
2696 _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr,
2697         char *buf)
2698 {
2699         struct Scsi_Host *shost = class_to_shost(cdev);
2700         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2701         Mpi2IOUnitPage3_t *io_unit_pg3 = NULL;
2702         Mpi2ConfigReply_t mpi_reply;
2703         u16 backup_rail_monitor_status = 0;
2704         u16 ioc_status;
2705         int sz;
2706         ssize_t rc = 0;
2707
2708         if (!ioc->is_warpdrive) {
2709                 printk(MPT2SAS_ERR_FMT "%s: BRM attribute is only for"\
2710                     "warpdrive\n", ioc->name, __func__);
2711                 goto out;
2712         }
2713
2714         /* allocate upto GPIOVal 36 entries */
2715         sz = offsetof(Mpi2IOUnitPage3_t, GPIOVal) + (sizeof(u16) * 36);
2716         io_unit_pg3 = kzalloc(sz, GFP_KERNEL);
2717         if (!io_unit_pg3) {
2718                 printk(MPT2SAS_ERR_FMT "%s: failed allocating memory"\
2719                     "for iounit_pg3: (%d) bytes\n", ioc->name, __func__, sz);
2720                 goto out;
2721         }
2722
2723         if (mpt2sas_config_get_iounit_pg3(ioc, &mpi_reply, io_unit_pg3, sz) !=
2724             0) {
2725                 printk(MPT2SAS_ERR_FMT
2726                     "%s: failed reading iounit_pg3\n", ioc->name,
2727                     __func__);
2728                 goto out;
2729         }
2730
2731         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
2732         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
2733                 printk(MPT2SAS_ERR_FMT "%s: iounit_pg3 failed with"\
2734                     "ioc_status(0x%04x)\n", ioc->name, __func__, ioc_status);
2735                 goto out;
2736         }
2737
2738         if (io_unit_pg3->GPIOCount < 25) {
2739                 printk(MPT2SAS_ERR_FMT "%s: iounit_pg3->GPIOCount less than"\
2740                      "25 entries, detected (%d) entries\n", ioc->name, __func__,
2741                     io_unit_pg3->GPIOCount);
2742                 goto out;
2743         }
2744
2745         /* BRM status is in bit zero of GPIOVal[24] */
2746         backup_rail_monitor_status = le16_to_cpu(io_unit_pg3->GPIOVal[24]);
2747         rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
2748
2749  out:
2750         kfree(io_unit_pg3);
2751         return rc;
2752 }
2753 static DEVICE_ATTR(BRM_status, S_IRUGO, _ctl_BRM_status_show, NULL);
2754
2755 struct DIAG_BUFFER_START {
2756         __le32 Size;
2757         __le32 DiagVersion;
2758         u8 BufferType;
2759         u8 Reserved[3];
2760         __le32 Reserved1;
2761         __le32 Reserved2;
2762         __le32 Reserved3;
2763 };
2764 /**
2765  * _ctl_host_trace_buffer_size_show - host buffer size (trace only)
2766  * @cdev - pointer to embedded class device
2767  * @buf - the buffer returned
2768  *
2769  * A sysfs 'read-only' shost attribute.
2770  */
2771 static ssize_t
2772 _ctl_host_trace_buffer_size_show(struct device *cdev,
2773     struct device_attribute *attr, char *buf)
2774 {
2775         struct Scsi_Host *shost = class_to_shost(cdev);
2776         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2777         u32 size = 0;
2778         struct DIAG_BUFFER_START *request_data;
2779
2780         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2781                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2782                     "registered\n", ioc->name, __func__);
2783                 return 0;
2784         }
2785
2786         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2787             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2788                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2789                     "registered\n", ioc->name, __func__);
2790                 return 0;
2791         }
2792
2793         request_data = (struct DIAG_BUFFER_START *)
2794             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
2795         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
2796             le32_to_cpu(request_data->DiagVersion) == 0x01000000) &&
2797             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
2798                 size = le32_to_cpu(request_data->Size);
2799
2800         ioc->ring_buffer_sz = size;
2801         return snprintf(buf, PAGE_SIZE, "%d\n", size);
2802 }
2803 static DEVICE_ATTR(host_trace_buffer_size, S_IRUGO,
2804          _ctl_host_trace_buffer_size_show, NULL);
2805
2806 /**
2807  * _ctl_host_trace_buffer_show - firmware ring buffer (trace only)
2808  * @cdev - pointer to embedded class device
2809  * @buf - the buffer returned
2810  *
2811  * A sysfs 'read/write' shost attribute.
2812  *
2813  * You will only be able to read 4k bytes of ring buffer at a time.
2814  * In order to read beyond 4k bytes, you will have to write out the
2815  * offset to the same attribute, it will move the pointer.
2816  */
2817 static ssize_t
2818 _ctl_host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
2819      char *buf)
2820 {
2821         struct Scsi_Host *shost = class_to_shost(cdev);
2822         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2823         void *request_data;
2824         u32 size;
2825
2826         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2827                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2828                     "registered\n", ioc->name, __func__);
2829                 return 0;
2830         }
2831
2832         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2833             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2834                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2835                     "registered\n", ioc->name, __func__);
2836                 return 0;
2837         }
2838
2839         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
2840                 return 0;
2841
2842         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
2843         size = (size > PAGE_SIZE) ? PAGE_SIZE : size;
2844         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
2845         memcpy(buf, request_data, size);
2846         return size;
2847 }
2848
2849 static ssize_t
2850 _ctl_host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
2851     const char *buf, size_t count)
2852 {
2853         struct Scsi_Host *shost = class_to_shost(cdev);
2854         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2855         int val = 0;
2856
2857         if (sscanf(buf, "%d", &val) != 1)
2858                 return -EINVAL;
2859
2860         ioc->ring_buffer_offset = val;
2861         return strlen(buf);
2862 }
2863 static DEVICE_ATTR(host_trace_buffer, S_IRUGO | S_IWUSR,
2864     _ctl_host_trace_buffer_show, _ctl_host_trace_buffer_store);
2865
2866 /*****************************************/
2867
2868 /**
2869  * _ctl_host_trace_buffer_enable_show - firmware ring buffer (trace only)
2870  * @cdev - pointer to embedded class device
2871  * @buf - the buffer returned
2872  *
2873  * A sysfs 'read/write' shost attribute.
2874  *
2875  * This is a mechnism to post/release host_trace_buffers
2876  */
2877 static ssize_t
2878 _ctl_host_trace_buffer_enable_show(struct device *cdev,
2879     struct device_attribute *attr, char *buf)
2880 {
2881         struct Scsi_Host *shost = class_to_shost(cdev);
2882         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2883
2884         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
2885            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2886             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0))
2887                 return snprintf(buf, PAGE_SIZE, "off\n");
2888         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2889             MPT2_DIAG_BUFFER_IS_RELEASED))
2890                 return snprintf(buf, PAGE_SIZE, "release\n");
2891         else
2892                 return snprintf(buf, PAGE_SIZE, "post\n");
2893 }
2894
2895 static ssize_t
2896 _ctl_host_trace_buffer_enable_store(struct device *cdev,
2897     struct device_attribute *attr, const char *buf, size_t count)
2898 {
2899         struct Scsi_Host *shost = class_to_shost(cdev);
2900         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2901         char str[10] = "";
2902         struct mpt2_diag_register diag_register;
2903         u8 issue_reset = 0;
2904
2905         if (sscanf(buf, "%9s", str) != 1)
2906                 return -EINVAL;
2907
2908         if (!strcmp(str, "post")) {
2909                 /* exit out if host buffers are already posted */
2910                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
2911                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2912                     MPT2_DIAG_BUFFER_IS_REGISTERED) &&
2913                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2914                     MPT2_DIAG_BUFFER_IS_RELEASED) == 0))
2915                         goto out;
2916                 memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
2917                 printk(MPT2SAS_INFO_FMT "posting host trace buffers\n",
2918                     ioc->name);
2919                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
2920                 diag_register.requested_buffer_size = (1024 * 1024);
2921                 diag_register.unique_id = 0x7075900;
2922                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
2923                 _ctl_diag_register_2(ioc,  &diag_register);
2924         } else if (!strcmp(str, "release")) {
2925                 /* exit out if host buffers are already released */
2926                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
2927                         goto out;
2928                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2929                     MPT2_DIAG_BUFFER_IS_REGISTERED) == 0)
2930                         goto out;
2931                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2932                     MPT2_DIAG_BUFFER_IS_RELEASED))
2933                         goto out;
2934                 printk(MPT2SAS_INFO_FMT "releasing host trace buffer\n",
2935                     ioc->name);
2936                 _ctl_send_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE, &issue_reset);
2937         }
2938
2939  out:
2940         return strlen(buf);
2941 }
2942 static DEVICE_ATTR(host_trace_buffer_enable, S_IRUGO | S_IWUSR,
2943     _ctl_host_trace_buffer_enable_show, _ctl_host_trace_buffer_enable_store);
2944
2945 struct device_attribute *mpt2sas_host_attrs[] = {
2946         &dev_attr_version_fw,
2947         &dev_attr_version_bios,
2948         &dev_attr_version_mpi,
2949         &dev_attr_version_product,
2950         &dev_attr_version_nvdata_persistent,
2951         &dev_attr_version_nvdata_default,
2952         &dev_attr_board_name,
2953         &dev_attr_board_assembly,
2954         &dev_attr_board_tracer,
2955         &dev_attr_io_delay,
2956         &dev_attr_device_delay,
2957         &dev_attr_logging_level,
2958         &dev_attr_fwfault_debug,
2959         &dev_attr_fw_queue_depth,
2960         &dev_attr_host_sas_address,
2961         &dev_attr_ioc_reset_count,
2962         &dev_attr_host_trace_buffer_size,
2963         &dev_attr_host_trace_buffer,
2964         &dev_attr_host_trace_buffer_enable,
2965         &dev_attr_reply_queue_count,
2966         &dev_attr_BRM_status,
2967         NULL,
2968 };
2969
2970 /**
2971  * _ctl_device_sas_address_show - sas address
2972  * @cdev - pointer to embedded class device
2973  * @buf - the buffer returned
2974  *
2975  * This is the sas address for the target
2976  *
2977  * A sysfs 'read-only' shost attribute.
2978  */
2979 static ssize_t
2980 _ctl_device_sas_address_show(struct device *dev, struct device_attribute *attr,
2981     char *buf)
2982 {
2983         struct scsi_device *sdev = to_scsi_device(dev);
2984         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
2985
2986         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2987             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
2988 }
2989 static DEVICE_ATTR(sas_address, S_IRUGO, _ctl_device_sas_address_show, NULL);
2990
2991 /**
2992  * _ctl_device_handle_show - device handle
2993  * @cdev - pointer to embedded class device
2994  * @buf - the buffer returned
2995  *
2996  * This is the firmware assigned device handle
2997  *
2998  * A sysfs 'read-only' shost attribute.
2999  */
3000 static ssize_t
3001 _ctl_device_handle_show(struct device *dev, struct device_attribute *attr,
3002     char *buf)
3003 {
3004         struct scsi_device *sdev = to_scsi_device(dev);
3005         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3006
3007         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
3008             sas_device_priv_data->sas_target->handle);
3009 }
3010 static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL);
3011
3012 struct device_attribute *mpt2sas_dev_attrs[] = {
3013         &dev_attr_sas_address,
3014         &dev_attr_sas_device_handle,
3015         NULL,
3016 };
3017
3018 static const struct file_operations ctl_fops = {
3019         .owner = THIS_MODULE,
3020         .unlocked_ioctl = _ctl_ioctl,
3021         .poll = _ctl_poll,
3022         .fasync = _ctl_fasync,
3023 #ifdef CONFIG_COMPAT
3024         .compat_ioctl = _ctl_ioctl_compat,
3025 #endif
3026         .llseek = noop_llseek,
3027 };
3028
3029 static struct miscdevice ctl_dev = {
3030         .minor  = MPT2SAS_MINOR,
3031         .name   = MPT2SAS_DEV_NAME,
3032         .fops   = &ctl_fops,
3033 };
3034
3035 /**
3036  * mpt2sas_ctl_init - main entry point for ctl.
3037  *
3038  */
3039 void
3040 mpt2sas_ctl_init(void)
3041 {
3042         async_queue = NULL;
3043         if (misc_register(&ctl_dev) < 0)
3044                 printk(KERN_ERR "%s can't register misc device [minor=%d]\n",
3045                     MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
3046
3047         init_waitqueue_head(&ctl_poll_wait);
3048 }
3049
3050 /**
3051  * mpt2sas_ctl_exit - exit point for ctl
3052  *
3053  */
3054 void
3055 mpt2sas_ctl_exit(void)
3056 {
3057         struct MPT2SAS_ADAPTER *ioc;
3058         int i;
3059
3060         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
3061
3062                 /* free memory associated to diag buffers */
3063                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
3064                         if (!ioc->diag_buffer[i])
3065                                 continue;
3066                         pci_free_consistent(ioc->pdev, ioc->diag_buffer_sz[i],
3067                             ioc->diag_buffer[i], ioc->diag_buffer_dma[i]);
3068                         ioc->diag_buffer[i] = NULL;
3069                         ioc->diag_buffer_status[i] = 0;
3070                 }
3071
3072                 kfree(ioc->event_log);
3073         }
3074         misc_deregister(&ctl_dev);
3075 }
3076