kernel/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) 2007-2014  LSI Corporation
   7  * Copyright (C) 20013-2014 Avago Technologies
   8  *  (mailto: MPT-FusionLinux.pdl@avagotech.com)
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * NO WARRANTY
  21  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  22  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  23  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  24  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  25  * solely responsible for determining the appropriateness of using and
  26  * distributing the Program and assumes all risks associated with its
  27  * exercise of rights under this Agreement, including but not limited to
  28  * the risks and costs of program errors, damage to or loss of data,
  29  * programs or equipment, and unavailability or interruption of operations.
  30
  31  * DISCLAIMER OF LIABILITY
  32  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  33  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  35  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  36  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  37  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  38  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  39
  40  * You should have received a copy of the GNU General Public License
  41  * along with this program; if not, write to the Free Software
  42  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  43  * USA.
  44  */
  45
  46 #include <linux/kernel.h>
  47 #include <linux/module.h>
  48 #include <linux/errno.h>
  49 #include <linux/init.h>
  50 #include <linux/slab.h>
  51 #include <linux/types.h>
  52 #include <linux/pci.h>
  53 #include <linux/delay.h>
  54 #include <linux/mutex.h>
  55 #include <linux/compat.h>
  56 #include <linux/poll.h>
  57
  58 #include <linux/io.h>
  59 #include <linux/uaccess.h>
  60
  61 #include "mpt2sas_base.h"
  62 #include "mpt2sas_ctl.h"
  63
  64 static DEFINE_MUTEX(_ctl_mutex);
  65 static struct fasync_struct *async_queue;
  66 static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
  67
  68 static int _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type,
  69     u8 *issue_reset);
  70
  71 /**
  72  * enum block_state - blocking state
  73  * @NON_BLOCKING: non blocking
  74  * @BLOCKING: blocking
  75  *
  76  * These states are for ioctls that need to wait for a response
  77  * from firmware, so they probably require sleep.
  78  */
  79 enum block_state {
  80         NON_BLOCKING,
  81         BLOCKING,
  82 };
  83
  84 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
  85 /**
  86  * _ctl_sas_device_find_by_handle - sas device search
  87  * @ioc: per adapter object
  88  * @handle: sas device handle (assigned by firmware)
  89  * Context: Calling function should acquire ioc->sas_device_lock
  90  *
  91  * This searches for sas_device based on sas_address, then return sas_device
  92  * object.
  93  */
  94 static struct _sas_device *
  95 _ctl_sas_device_find_by_handle(struct MPT2SAS_ADAPTER *ioc, u16 handle)
  96 {
  97         struct _sas_device *sas_device, *r;
  98
  99         r = NULL;
 100         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
 101                 if (sas_device->handle != handle)
 102                         continue;
 103                 r = sas_device;
 104                 goto out;
 105         }
 106
 107  out:
 108         return r;
 109 }
 110
 111 /**
 112  * _ctl_display_some_debug - debug routine
 113  * @ioc: per adapter object
 114  * @smid: system request message index
 115  * @calling_function_name: string pass from calling function
 116  * @mpi_reply: reply message frame
 117  * Context: none.
 118  *
 119  * Function for displaying debug info helpful when debugging issues
 120  * in this module.
 121  */
 122 static void
 123 _ctl_display_some_debug(struct MPT2SAS_ADAPTER *ioc, u16 smid,
 124     char *calling_function_name, MPI2DefaultReply_t *mpi_reply)
 125 {
 126         Mpi2ConfigRequest_t *mpi_request;
 127         char *desc = NULL;
 128
 129         if (!(ioc->logging_level & MPT_DEBUG_IOCTL))
 130                 return;
 131
 132         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
 133         switch (mpi_request->Function) {
 134         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 135         {
 136                 Mpi2SCSIIORequest_t *scsi_request =
 137                     (Mpi2SCSIIORequest_t *)mpi_request;
 138
 139                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 140                     "scsi_io, cmd(0x%02x), cdb_len(%d)",
 141                     scsi_request->CDB.CDB32[0],
 142                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 143                 desc = ioc->tmp_string;
 144                 break;
 145         }
 146         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 147                 desc = "task_mgmt";
 148                 break;
 149         case MPI2_FUNCTION_IOC_INIT:
 150                 desc = "ioc_init";
 151                 break;
 152         case MPI2_FUNCTION_IOC_FACTS:
 153                 desc = "ioc_facts";
 154                 break;
 155         case MPI2_FUNCTION_CONFIG:
 156         {
 157                 Mpi2ConfigRequest_t *config_request =
 158                     (Mpi2ConfigRequest_t *)mpi_request;
 159
 160                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 161                     "config, type(0x%02x), ext_type(0x%02x), number(%d)",
 162                     (config_request->Header.PageType &
 163                      MPI2_CONFIG_PAGETYPE_MASK), config_request->ExtPageType,
 164                     config_request->Header.PageNumber);
 165                 desc = ioc->tmp_string;
 166                 break;
 167         }
 168         case MPI2_FUNCTION_PORT_FACTS:
 169                 desc = "port_facts";
 170                 break;
 171         case MPI2_FUNCTION_PORT_ENABLE:
 172                 desc = "port_enable";
 173                 break;
 174         case MPI2_FUNCTION_EVENT_NOTIFICATION:
 175                 desc = "event_notification";
 176                 break;
 177         case MPI2_FUNCTION_FW_DOWNLOAD:
 178                 desc = "fw_download";
 179                 break;
 180         case MPI2_FUNCTION_FW_UPLOAD:
 181                 desc = "fw_upload";
 182                 break;
 183         case MPI2_FUNCTION_RAID_ACTION:
 184                 desc = "raid_action";
 185                 break;
 186         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 187         {
 188                 Mpi2SCSIIORequest_t *scsi_request =
 189                     (Mpi2SCSIIORequest_t *)mpi_request;
 190
 191                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 192                     "raid_pass, cmd(0x%02x), cdb_len(%d)",
 193                     scsi_request->CDB.CDB32[0],
 194                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 195                 desc = ioc->tmp_string;
 196                 break;
 197         }
 198         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 199                 desc = "sas_iounit_cntl";
 200                 break;
 201         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 202                 desc = "sata_pass";
 203                 break;
 204         case MPI2_FUNCTION_DIAG_BUFFER_POST:
 205                 desc = "diag_buffer_post";
 206                 break;
 207         case MPI2_FUNCTION_DIAG_RELEASE:
 208                 desc = "diag_release";
 209                 break;
 210         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 211                 desc = "smp_passthrough";
 212                 break;
 213         }
 214
 215         if (!desc)
 216                 return;
 217
 218         printk(MPT2SAS_INFO_FMT "%s: %s, smid(%d)\n",
 219             ioc->name, calling_function_name, desc, smid);
 220
 221         if (!mpi_reply)
 222                 return;
 223
 224         if (mpi_reply->IOCStatus || mpi_reply->IOCLogInfo)
 225                 printk(MPT2SAS_INFO_FMT
 226                     "\tiocstatus(0x%04x), loginfo(0x%08x)\n",
 227                     ioc->name, le16_to_cpu(mpi_reply->IOCStatus),
 228                     le32_to_cpu(mpi_reply->IOCLogInfo));
 229
 230         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 231             mpi_request->Function ==
 232             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 233                 Mpi2SCSIIOReply_t *scsi_reply =
 234                     (Mpi2SCSIIOReply_t *)mpi_reply;
 235                 struct _sas_device *sas_device = NULL;
 236                 unsigned long flags;
 237
 238                 spin_lock_irqsave(&ioc->sas_device_lock, flags);
 239                 sas_device = _ctl_sas_device_find_by_handle(ioc,
 240                     le16_to_cpu(scsi_reply->DevHandle));
 241                 if (sas_device) {
 242                         printk(MPT2SAS_WARN_FMT "\tsas_address(0x%016llx), "
 243                             "phy(%d)\n", ioc->name, (unsigned long long)
 244                             sas_device->sas_address, sas_device->phy);
 245                         printk(MPT2SAS_WARN_FMT
 246                             "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 247                             ioc->name, sas_device->enclosure_logical_id,
 248                             sas_device->slot);
 249                 }
 250                 spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
 251                 if (scsi_reply->SCSIState || scsi_reply->SCSIStatus)
 252                         printk(MPT2SAS_INFO_FMT
 253                             "\tscsi_state(0x%02x), scsi_status"
 254                             "(0x%02x)\n", ioc->name,
 255                             scsi_reply->SCSIState,
 256                             scsi_reply->SCSIStatus);
 257         }
 258 }
 259 #endif
 260
 261 /**
 262  * mpt2sas_ctl_done - ctl module completion routine
 263  * @ioc: per adapter object
 264  * @smid: system request message index
 265  * @msix_index: MSIX table index supplied by the OS
 266  * @reply: reply message frame(lower 32bit addr)
 267  * Context: none.
 268  *
 269  * The callback handler when using ioc->ctl_cb_idx.
 270  *
 271  * Return 1 meaning mf should be freed from _base_interrupt
 272  *        0 means the mf is freed from this function.
 273  */
 274 u8
 275 mpt2sas_ctl_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 276         u32 reply)
 277 {
 278         MPI2DefaultReply_t *mpi_reply;
 279         Mpi2SCSIIOReply_t *scsiio_reply;
 280         const void *sense_data;
 281         u32 sz;
 282
 283         if (ioc->ctl_cmds.status == MPT2_CMD_NOT_USED)
 284                 return 1;
 285         if (ioc->ctl_cmds.smid != smid)
 286                 return 1;
 287         ioc->ctl_cmds.status |= MPT2_CMD_COMPLETE;
 288         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 289         if (mpi_reply) {
 290                 memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 291                 ioc->ctl_cmds.status |= MPT2_CMD_REPLY_VALID;
 292                 /* get sense data */
 293                 if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 294                     mpi_reply->Function ==
 295                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 296                         scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply;
 297                         if (scsiio_reply->SCSIState &
 298                             MPI2_SCSI_STATE_AUTOSENSE_VALID) {
 299                                 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
 300                                     le32_to_cpu(scsiio_reply->SenseCount));
 301                                 sense_data = mpt2sas_base_get_sense_buffer(ioc,
 302                                     smid);
 303                                 memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 304                         }
 305                 }
 306         }
 307 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 308         _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply);
 309 #endif
 310         ioc->ctl_cmds.status &= ~MPT2_CMD_PENDING;
 311         complete(&ioc->ctl_cmds.done);
 312         return 1;
 313 }
 314
 315 /**
 316  * _ctl_check_event_type - determines when an event needs logging
 317  * @ioc: per adapter object
 318  * @event: firmware event
 319  *
 320  * The bitmask in ioc->event_type[] indicates which events should be
 321  * be saved in the driver event_log.  This bitmask is set by application.
 322  *
 323  * Returns 1 when event should be captured, or zero means no match.
 324  */
 325 static int
 326 _ctl_check_event_type(struct MPT2SAS_ADAPTER *ioc, u16 event)
 327 {
 328         u16 i;
 329         u32 desired_event;
 330
 331         if (event >= 128 || !event || !ioc->event_log)
 332                 return 0;
 333
 334         desired_event = (1 << (event % 32));
 335         if (!desired_event)
 336                 desired_event = 1;
 337         i = event / 32;
 338         return desired_event & ioc->event_type[i];
 339 }
 340
 341 /**
 342  * mpt2sas_ctl_add_to_event_log - add event
 343  * @ioc: per adapter object
 344  * @mpi_reply: reply message frame
 345  *
 346  * Return nothing.
 347  */
 348 void
 349 mpt2sas_ctl_add_to_event_log(struct MPT2SAS_ADAPTER *ioc,
 350     Mpi2EventNotificationReply_t *mpi_reply)
 351 {
 352         struct MPT2_IOCTL_EVENTS *event_log;
 353         u16 event;
 354         int i;
 355         u32 sz, event_data_sz;
 356         u8 send_aen = 0;
 357
 358         if (!ioc->event_log)
 359                 return;
 360
 361         event = le16_to_cpu(mpi_reply->Event);
 362
 363         if (_ctl_check_event_type(ioc, event)) {
 364
 365                 /* insert entry into circular event_log */
 366                 i = ioc->event_context % MPT2SAS_CTL_EVENT_LOG_SIZE;
 367                 event_log = ioc->event_log;
 368                 event_log[i].event = event;
 369                 event_log[i].context = ioc->event_context++;
 370
 371                 event_data_sz = le16_to_cpu(mpi_reply->EventDataLength)*4;
 372                 sz = min_t(u32, event_data_sz, MPT2_EVENT_DATA_SIZE);
 373                 memset(event_log[i].data, 0, MPT2_EVENT_DATA_SIZE);
 374                 memcpy(event_log[i].data, mpi_reply->EventData, sz);
 375                 send_aen = 1;
 376         }
 377
 378         /* This aen_event_read_flag flag is set until the
 379          * application has read the event log.
 380          * For MPI2_EVENT_LOG_ENTRY_ADDED, we always notify.
 381          */
 382         if (event == MPI2_EVENT_LOG_ENTRY_ADDED ||
 383             (send_aen && !ioc->aen_event_read_flag)) {
 384                 ioc->aen_event_read_flag = 1;
 385                 wake_up_interruptible(&ctl_poll_wait);
 386                 if (async_queue)
 387                         kill_fasync(&async_queue, SIGIO, POLL_IN);
 388         }
 389 }
 390
 391 /**
 392  * mpt2sas_ctl_event_callback - firmware event handler (called at ISR time)
 393  * @ioc: per adapter object
 394  * @msix_index: MSIX table index supplied by the OS
 395  * @reply: reply message frame(lower 32bit addr)
 396  * Context: interrupt.
 397  *
 398  * This function merely adds a new work task into ioc->firmware_event_thread.
 399  * The tasks are worked from _firmware_event_work in user context.
 400  *
 401  * Returns void.
 402  */
 403 void
 404 mpt2sas_ctl_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index,
 405         u32 reply)
 406 {
 407         Mpi2EventNotificationReply_t *mpi_reply;
 408
 409         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 410         if (unlikely(!mpi_reply)) {
 411                 printk(MPT2SAS_ERR_FMT "mpi_reply not valid at %s:%d/%s()!\n",
 412                     ioc->name, __FILE__, __LINE__, __func__);
 413                 return;
 414         }
 415         mpt2sas_ctl_add_to_event_log(ioc, mpi_reply);
 416         return;
 417 }
 418
 419 /**
 420  * _ctl_verify_adapter - validates ioc_number passed from application
 421  * @ioc: per adapter object
 422  * @iocpp: The ioc pointer is returned in this.
 423  *
 424  * Return (-1) means error, else ioc_number.
 425  */
 426 static int
 427 _ctl_verify_adapter(int ioc_number, struct MPT2SAS_ADAPTER **iocpp)
 428 {
 429         struct MPT2SAS_ADAPTER *ioc;
 430
 431         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 432                 if (ioc->id != ioc_number)
 433                         continue;
 434                 *iocpp = ioc;
 435                 return ioc_number;
 436         }
 437         *iocpp = NULL;
 438         return -1;
 439 }
 440
 441 /**
 442  * mpt2sas_ctl_reset_handler - reset callback handler (for ctl)
 443  * @ioc: per adapter object
 444  * @reset_phase: phase
 445  *
 446  * The handler for doing any required cleanup or initialization.
 447  *
 448  * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
 449  * MPT2_IOC_DONE_RESET
 450  */
 451 void
 452 mpt2sas_ctl_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
 453 {
 454         int i;
 455         u8 issue_reset;
 456
 457         switch (reset_phase) {
 458         case MPT2_IOC_PRE_RESET:
 459                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 460                     "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
 461                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 462                         if (!(ioc->diag_buffer_status[i] &
 463                             MPT2_DIAG_BUFFER_IS_REGISTERED))
 464                                 continue;
 465                         if ((ioc->diag_buffer_status[i] &
 466                             MPT2_DIAG_BUFFER_IS_RELEASED))
 467                                 continue;
 468                         _ctl_send_release(ioc, i, &issue_reset);
 469                 }
 470                 break;
 471         case MPT2_IOC_AFTER_RESET:
 472                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 473                     "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
 474                 if (ioc->ctl_cmds.status & MPT2_CMD_PENDING) {
 475                         ioc->ctl_cmds.status |= MPT2_CMD_RESET;
 476                         mpt2sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
 477                         complete(&ioc->ctl_cmds.done);
 478                 }
 479                 break;
 480         case MPT2_IOC_DONE_RESET:
 481                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 482                     "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
 483
 484                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 485                         if (!(ioc->diag_buffer_status[i] &
 486                             MPT2_DIAG_BUFFER_IS_REGISTERED))
 487                                 continue;
 488                         if ((ioc->diag_buffer_status[i] &
 489                             MPT2_DIAG_BUFFER_IS_RELEASED))
 490                                 continue;
 491                         ioc->diag_buffer_status[i] |=
 492                             MPT2_DIAG_BUFFER_IS_DIAG_RESET;
 493                 }
 494                 break;
 495         }
 496 }
 497
 498 /**
 499  * _ctl_fasync -
 500  * @fd -
 501  * @filep -
 502  * @mode -
 503  *
 504  * Called when application request fasyn callback handler.
 505  */
 506 static int
 507 _ctl_fasync(int fd, struct file *filep, int mode)
 508 {
 509         return fasync_helper(fd, filep, mode, &async_queue);
 510 }
 511
 512 /**
 513  * _ctl_poll -
 514  * @file -
 515  * @wait -
 516  *
 517  */
 518 static unsigned int
 519 _ctl_poll(struct file *filep, poll_table *wait)
 520 {
 521         struct MPT2SAS_ADAPTER *ioc;
 522
 523         poll_wait(filep, &ctl_poll_wait, wait);
 524
 525         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 526                 if (ioc->aen_event_read_flag)
 527                         return POLLIN | POLLRDNORM;
 528         }
 529         return 0;
 530 }
 531
 532 /**
 533  * _ctl_set_task_mid - assign an active smid to tm request
 534  * @ioc: per adapter object
 535  * @karg - (struct mpt2_ioctl_command)
 536  * @tm_request - pointer to mf from user space
 537  *
 538  * Returns 0 when an smid if found, else fail.
 539  * during failure, the reply frame is filled.
 540  */
 541 static int
 542 _ctl_set_task_mid(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command *karg,
 543     Mpi2SCSITaskManagementRequest_t *tm_request)
 544 {
 545         u8 found = 0;
 546         u16 i;
 547         u16 handle;
 548         struct scsi_cmnd *scmd;
 549         struct MPT2SAS_DEVICE *priv_data;
 550         unsigned long flags;
 551         Mpi2SCSITaskManagementReply_t *tm_reply;
 552         u32 sz;
 553         u32 lun;
 554         char *desc = NULL;
 555
 556         if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
 557                 desc = "abort_task";
 558         else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
 559                 desc = "query_task";
 560         else
 561                 return 0;
 562
 563         lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
 564
 565         handle = le16_to_cpu(tm_request->DevHandle);
 566         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
 567         for (i = ioc->scsiio_depth; i && !found; i--) {
 568                 scmd = ioc->scsi_lookup[i - 1].scmd;
 569                 if (scmd == NULL || scmd->device == NULL ||
 570                     scmd->device->hostdata == NULL)
 571                         continue;
 572                 if (lun != scmd->device->lun)
 573                         continue;
 574                 priv_data = scmd->device->hostdata;
 575                 if (priv_data->sas_target == NULL)
 576                         continue;
 577                 if (priv_data->sas_target->handle != handle)
 578                         continue;
 579                 tm_request->TaskMID = cpu_to_le16(ioc->scsi_lookup[i - 1].smid);
 580                 found = 1;
 581         }
 582         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
 583
 584         if (!found) {
 585                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 586                     "handle(0x%04x), lun(%d), no active mid!!\n", ioc->name,
 587                     desc, le16_to_cpu(tm_request->DevHandle), lun));
 588                 tm_reply = ioc->ctl_cmds.reply;
 589                 tm_reply->DevHandle = tm_request->DevHandle;
 590                 tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 591                 tm_reply->TaskType = tm_request->TaskType;
 592                 tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
 593                 tm_reply->VP_ID = tm_request->VP_ID;
 594                 tm_reply->VF_ID = tm_request->VF_ID;
 595                 sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
 596                 if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 597                     sz))
 598                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 599                             __LINE__, __func__);
 600                 return 1;
 601         }
 602
 603         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
 604             "handle(0x%04x), lun(%d), task_mid(%d)\n", ioc->name,
 605             desc, le16_to_cpu(tm_request->DevHandle), lun,
 606              le16_to_cpu(tm_request->TaskMID)));
 607         return 0;
 608 }
 609
 610 /**
 611  * _ctl_do_mpt_command - main handler for MPT2COMMAND opcode
 612  * @ioc: per adapter object
 613  * @karg - (struct mpt2_ioctl_command)
 614  * @mf - pointer to mf in user space
 615  */
 616 static long
 617 _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command karg,
 618         void __user *mf)
 619 {
 620         MPI2RequestHeader_t *mpi_request = NULL, *request;
 621         MPI2DefaultReply_t *mpi_reply;
 622         u32 ioc_state;
 623         u16 ioc_status;
 624         u16 smid;
 625         unsigned long timeout, timeleft;
 626         u8 issue_reset;
 627         u32 sz;
 628         void *psge;
 629         void *data_out = NULL;
 630         dma_addr_t data_out_dma;
 631         size_t data_out_sz = 0;
 632         void *data_in = NULL;
 633         dma_addr_t data_in_dma;
 634         size_t data_in_sz = 0;
 635         u32 sgl_flags;
 636         long ret;
 637         u16 wait_state_count;
 638
 639         issue_reset = 0;
 640
 641         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
 642                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
 643                     ioc->name, __func__);
 644                 ret = -EAGAIN;
 645                 goto out;
 646         }
 647
 648         wait_state_count = 0;
 649         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 650         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 651                 if (wait_state_count++ == 10) {
 652                         printk(MPT2SAS_ERR_FMT
 653                             "%s: failed due to ioc not operational\n",
 654                             ioc->name, __func__);
 655                         ret = -EFAULT;
 656                         goto out;
 657                 }
 658                 ssleep(1);
 659                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 660                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 661                     "operational state(count=%d)\n", ioc->name,
 662                     __func__, wait_state_count);
 663         }
 664         if (wait_state_count)
 665                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 666                     ioc->name, __func__);
 667
 668         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 669         if (!mpi_request) {
 670                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a memory for "
 671                     "mpi_request\n", ioc->name, __func__);
 672                 ret = -ENOMEM;
 673                 goto out;
 674         }
 675
 676         /* Check for overflow and wraparound */
 677         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 678             karg.data_sge_offset > (UINT_MAX / 4)) {
 679                 ret = -EINVAL;
 680                 goto out;
 681         }
 682
 683         /* copy in request message frame from user */
 684         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 685                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 686                     __func__);
 687                 ret = -EFAULT;
 688                 goto out;
 689         }
 690
 691         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 692                 smid = mpt2sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 693                 if (!smid) {
 694                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 695                             ioc->name, __func__);
 696                         ret = -EAGAIN;
 697                         goto out;
 698                 }
 699         } else {
 700
 701                 smid = mpt2sas_base_get_smid_scsiio(ioc, ioc->ctl_cb_idx, NULL);
 702                 if (!smid) {
 703                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 704                             ioc->name, __func__);
 705                         ret = -EAGAIN;
 706                         goto out;
 707                 }
 708         }
 709
 710         ret = 0;
 711         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
 712         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 713         request = mpt2sas_base_get_msg_frame(ioc, smid);
 714         memcpy(request, mpi_request, karg.data_sge_offset*4);
 715         ioc->ctl_cmds.smid = smid;
 716         data_out_sz = karg.data_out_size;
 717         data_in_sz = karg.data_in_size;
 718
 719         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 720             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 721                 if (!le16_to_cpu(mpi_request->FunctionDependent1) ||
 722                     le16_to_cpu(mpi_request->FunctionDependent1) >
 723                     ioc->facts.MaxDevHandle) {
 724                         ret = -EINVAL;
 725                         mpt2sas_base_free_smid(ioc, smid);
 726                         goto out;
 727                 }
 728         }
 729
 730         /* obtain dma-able memory for data transfer */
 731         if (data_out_sz) /* WRITE */ {
 732                 data_out = pci_alloc_consistent(ioc->pdev, data_out_sz,
 733                     &data_out_dma);
 734                 if (!data_out) {
 735                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 736                             __LINE__, __func__);
 737                         ret = -ENOMEM;
 738                         mpt2sas_base_free_smid(ioc, smid);
 739                         goto out;
 740                 }
 741                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 742                         data_out_sz)) {
 743                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 744                             __LINE__, __func__);
 745                         ret =  -EFAULT;
 746                         mpt2sas_base_free_smid(ioc, smid);
 747                         goto out;
 748                 }
 749         }
 750
 751         if (data_in_sz) /* READ */ {
 752                 data_in = pci_alloc_consistent(ioc->pdev, data_in_sz,
 753                     &data_in_dma);
 754                 if (!data_in) {
 755                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 756                             __LINE__, __func__);
 757                         ret = -ENOMEM;
 758                         mpt2sas_base_free_smid(ioc, smid);
 759                         goto out;
 760                 }
 761         }
 762
 763         /* add scatter gather elements */
 764         psge = (void *)request + (karg.data_sge_offset*4);
 765
 766         if (!data_out_sz && !data_in_sz) {
 767                 mpt2sas_base_build_zero_len_sge(ioc, psge);
 768         } else if (data_out_sz && data_in_sz) {
 769                 /* WRITE sgel first */
 770                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 771                     MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 772                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 773                 ioc->base_add_sg_single(psge, sgl_flags |
 774                     data_out_sz, data_out_dma);
 775
 776                 /* incr sgel */
 777                 psge += ioc->sge_size;
 778
 779                 /* READ sgel last */
 780                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 781                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 782                     MPI2_SGE_FLAGS_END_OF_LIST);
 783                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 784                 ioc->base_add_sg_single(psge, sgl_flags |
 785                     data_in_sz, data_in_dma);
 786         } else if (data_out_sz) /* WRITE */ {
 787                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 788                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 789                     MPI2_SGE_FLAGS_END_OF_LIST | MPI2_SGE_FLAGS_HOST_TO_IOC);
 790                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 791                 ioc->base_add_sg_single(psge, sgl_flags |
 792                     data_out_sz, data_out_dma);
 793         } else if (data_in_sz) /* READ */ {
 794                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 795                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 796                     MPI2_SGE_FLAGS_END_OF_LIST);
 797                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 798                 ioc->base_add_sg_single(psge, sgl_flags |
 799                     data_in_sz, data_in_dma);
 800         }
 801
 802         /* send command to firmware */
 803 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 804         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 805 #endif
 806
 807         init_completion(&ioc->ctl_cmds.done);
 808         switch (mpi_request->Function) {
 809         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 810         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 811         {
 812                 Mpi2SCSIIORequest_t *scsiio_request =
 813                     (Mpi2SCSIIORequest_t *)request;
 814                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 815                 scsiio_request->SenseBufferLowAddress =
 816                     mpt2sas_base_get_sense_buffer_dma(ioc, smid);
 817                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 818                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 819                         mpt2sas_base_put_smid_scsi_io(ioc, smid,
 820                             le16_to_cpu(mpi_request->FunctionDependent1));
 821                 else
 822                         mpt2sas_base_put_smid_default(ioc, smid);
 823                 break;
 824         }
 825         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 826         {
 827                 Mpi2SCSITaskManagementRequest_t *tm_request =
 828                     (Mpi2SCSITaskManagementRequest_t *)request;
 829
 830                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 831                     "handle(0x%04x), task_type(0x%02x)\n", ioc->name,
 832                     le16_to_cpu(tm_request->DevHandle), tm_request->TaskType));
 833
 834                 if (tm_request->TaskType ==
 835                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 836                     tm_request->TaskType ==
 837                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 838                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 839                                 mpt2sas_base_free_smid(ioc, smid);
 840                                 goto out;
 841                         }
 842                 }
 843
 844                 mpt2sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 845                     tm_request->DevHandle));
 846                 mpt2sas_base_put_smid_hi_priority(ioc, smid);
 847                 break;
 848         }
 849         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 850         {
 851                 Mpi2SmpPassthroughRequest_t *smp_request =
 852                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 853                 u8 *data;
 854
 855                 /* ioc determines which port to use */
 856                 smp_request->PhysicalPort = 0xFF;
 857                 if (smp_request->PassthroughFlags &
 858                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 859                         data = (u8 *)&smp_request->SGL;
 860                 else {
 861                         if (unlikely(data_out == NULL)) {
 862                                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
 863                                     __FILE__, __LINE__, __func__);
 864                                 mpt2sas_base_free_smid(ioc, smid);
 865                                 ret = -EINVAL;
 866                                 goto out;
 867                         }
 868                         data = data_out;
 869                 }
 870
 871                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 872                         ioc->ioc_link_reset_in_progress = 1;
 873                         ioc->ignore_loginfos = 1;
 874                 }
 875                 mpt2sas_base_put_smid_default(ioc, smid);
 876                 break;
 877         }
 878         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 879         {
 880                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
 881                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
 882
 883                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
 884                     || sasiounit_request->Operation ==
 885                     MPI2_SAS_OP_PHY_LINK_RESET) {
 886                         ioc->ioc_link_reset_in_progress = 1;
 887                         ioc->ignore_loginfos = 1;
 888                 }
 889                 mpt2sas_base_put_smid_default(ioc, smid);
 890                 break;
 891         }
 892         default:
 893                 mpt2sas_base_put_smid_default(ioc, smid);
 894                 break;
 895         }
 896
 897         if (karg.timeout < MPT2_IOCTL_DEFAULT_TIMEOUT)
 898                 timeout = MPT2_IOCTL_DEFAULT_TIMEOUT;
 899         else
 900                 timeout = karg.timeout;
 901         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
 902             timeout*HZ);
 903         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 904                 Mpi2SCSITaskManagementRequest_t *tm_request =
 905                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
 906                 mpt2sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
 907                     tm_request->DevHandle));
 908         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
 909             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
 910                 ioc->ioc_link_reset_in_progress) {
 911                 ioc->ioc_link_reset_in_progress = 0;
 912                 ioc->ignore_loginfos = 0;
 913         }
 914         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
 915                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
 916                     __func__);
 917                 _debug_dump_mf(mpi_request, karg.data_sge_offset);
 918                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
 919                         issue_reset = 1;
 920                 goto issue_host_reset;
 921         }
 922
 923         mpi_reply = ioc->ctl_cmds.reply;
 924         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
 925
 926 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 927         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
 928             (ioc->logging_level & MPT_DEBUG_TM)) {
 929                 Mpi2SCSITaskManagementReply_t *tm_reply =
 930                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
 931
 932                 printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 933                     "IOCStatus(0x%04x), IOCLogInfo(0x%08x), "
 934                     "TerminationCount(0x%08x)\n", ioc->name,
 935                     le16_to_cpu(tm_reply->IOCStatus),
 936                     le32_to_cpu(tm_reply->IOCLogInfo),
 937                     le32_to_cpu(tm_reply->TerminationCount));
 938         }
 939 #endif
 940         /* copy out xdata to user */
 941         if (data_in_sz) {
 942                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
 943                     data_in_sz)) {
 944                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 945                             __LINE__, __func__);
 946                         ret = -ENODATA;
 947                         goto out;
 948                 }
 949         }
 950
 951         /* copy out reply message frame to user */
 952         if (karg.max_reply_bytes) {
 953                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
 954                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 955                     sz)) {
 956                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 957                             __LINE__, __func__);
 958                         ret = -ENODATA;
 959                         goto out;
 960                 }
 961         }
 962
 963         /* copy out sense to user */
 964         if (karg.max_sense_bytes && (mpi_request->Function ==
 965             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
 966             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) {
 967                 sz = min_t(u32, karg.max_sense_bytes, SCSI_SENSE_BUFFERSIZE);
 968                 if (copy_to_user(karg.sense_data_ptr,
 969                         ioc->ctl_cmds.sense, sz)) {
 970                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 971                             __LINE__, __func__);
 972                         ret = -ENODATA;
 973                         goto out;
 974                 }
 975         }
 976
 977  issue_host_reset:
 978         if (issue_reset) {
 979                 ret = -ENODATA;
 980                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 981                     mpi_request->Function ==
 982                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 983                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
 984                         printk(MPT2SAS_INFO_FMT "issue target reset: handle "
 985                             "= (0x%04x)\n", ioc->name,
 986                             le16_to_cpu(mpi_request->FunctionDependent1));
 987                         mpt2sas_halt_firmware(ioc);
 988                         mpt2sas_scsih_issue_tm(ioc,
 989                             le16_to_cpu(mpi_request->FunctionDependent1), 0, 0,
 990                             0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 10,
 991                             TM_MUTEX_ON);
 992                         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
 993                 } else
 994                         mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 995                             FORCE_BIG_HAMMER);
 996         }
 997
 998  out:
 999
1000         /* free memory associated with sg buffers */
1001         if (data_in)
1002                 pci_free_consistent(ioc->pdev, data_in_sz, data_in,
1003                     data_in_dma);
1004
1005         if (data_out)
1006                 pci_free_consistent(ioc->pdev, data_out_sz, data_out,
1007                     data_out_dma);
1008
1009         kfree(mpi_request);
1010         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1011         return ret;
1012 }
1013
1014 /**
1015  * _ctl_getiocinfo - main handler for MPT2IOCINFO opcode
1016  * @ioc: per adapter object
1017  * @arg - user space buffer containing ioctl content
1018  */
1019 static long
1020 _ctl_getiocinfo(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1021 {
1022         struct mpt2_ioctl_iocinfo karg;
1023
1024         if (copy_from_user(&karg, arg, sizeof(karg))) {
1025                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1026                     __FILE__, __LINE__, __func__);
1027                 return -EFAULT;
1028         }
1029
1030         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1031             __func__));
1032
1033         memset(&karg, 0 , sizeof(karg));
1034         if (ioc->is_warpdrive)
1035                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1036         else
1037                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1038         if (ioc->pfacts)
1039                 karg.port_number = ioc->pfacts[0].PortNumber;
1040         karg.hw_rev = ioc->pdev->revision;
1041         karg.pci_id = ioc->pdev->device;
1042         karg.subsystem_device = ioc->pdev->subsystem_device;
1043         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1044         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1045         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1046         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1047         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1048         karg.firmware_version = ioc->facts.FWVersion.Word;
1049         strcpy(karg.driver_version, MPT2SAS_DRIVER_NAME);
1050         strcat(karg.driver_version, "-");
1051         strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1052         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1053
1054         if (copy_to_user(arg, &karg, sizeof(karg))) {
1055                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1056                     __FILE__, __LINE__, __func__);
1057                 return -EFAULT;
1058         }
1059         return 0;
1060 }
1061
1062 /**
1063  * _ctl_eventquery - main handler for MPT2EVENTQUERY opcode
1064  * @ioc: per adapter object
1065  * @arg - user space buffer containing ioctl content
1066  */
1067 static long
1068 _ctl_eventquery(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1069 {
1070         struct mpt2_ioctl_eventquery karg;
1071
1072         if (copy_from_user(&karg, arg, sizeof(karg))) {
1073                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1074                     __FILE__, __LINE__, __func__);
1075                 return -EFAULT;
1076         }
1077
1078         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1079             __func__));
1080
1081         karg.event_entries = MPT2SAS_CTL_EVENT_LOG_SIZE;
1082         memcpy(karg.event_types, ioc->event_type,
1083             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1084
1085         if (copy_to_user(arg, &karg, sizeof(karg))) {
1086                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1087                     __FILE__, __LINE__, __func__);
1088                 return -EFAULT;
1089         }
1090         return 0;
1091 }
1092
1093 /**
1094  * _ctl_eventenable - main handler for MPT2EVENTENABLE opcode
1095  * @ioc: per adapter object
1096  * @arg - user space buffer containing ioctl content
1097  */
1098 static long
1099 _ctl_eventenable(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1100 {
1101         struct mpt2_ioctl_eventenable karg;
1102
1103         if (copy_from_user(&karg, arg, sizeof(karg))) {
1104                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1105                     __FILE__, __LINE__, __func__);
1106                 return -EFAULT;
1107         }
1108
1109         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1110             __func__));
1111
1112         if (ioc->event_log)
1113                 return 0;
1114         memcpy(ioc->event_type, karg.event_types,
1115             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1116         mpt2sas_base_validate_event_type(ioc, ioc->event_type);
1117
1118         /* initialize event_log */
1119         ioc->event_context = 0;
1120         ioc->aen_event_read_flag = 0;
1121         ioc->event_log = kcalloc(MPT2SAS_CTL_EVENT_LOG_SIZE,
1122             sizeof(struct MPT2_IOCTL_EVENTS), GFP_KERNEL);
1123         if (!ioc->event_log) {
1124                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1125                     __FILE__, __LINE__, __func__);
1126                 return -ENOMEM;
1127         }
1128         return 0;
1129 }
1130
1131 /**
1132  * _ctl_eventreport - main handler for MPT2EVENTREPORT opcode
1133  * @ioc: per adapter object
1134  * @arg - user space buffer containing ioctl content
1135  */
1136 static long
1137 _ctl_eventreport(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1138 {
1139         struct mpt2_ioctl_eventreport karg;
1140         u32 number_bytes, max_events, max;
1141         struct mpt2_ioctl_eventreport __user *uarg = arg;
1142
1143         if (copy_from_user(&karg, arg, sizeof(karg))) {
1144                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1145                     __FILE__, __LINE__, __func__);
1146                 return -EFAULT;
1147         }
1148
1149         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1150             __func__));
1151
1152         number_bytes = karg.hdr.max_data_size -
1153             sizeof(struct mpt2_ioctl_header);
1154         max_events = number_bytes/sizeof(struct MPT2_IOCTL_EVENTS);
1155         max = min_t(u32, MPT2SAS_CTL_EVENT_LOG_SIZE, max_events);
1156
1157         /* If fewer than 1 event is requested, there must have
1158          * been some type of error.
1159          */
1160         if (!max || !ioc->event_log)
1161                 return -ENODATA;
1162
1163         number_bytes = max * sizeof(struct MPT2_IOCTL_EVENTS);
1164         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1165                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1166                     __FILE__, __LINE__, __func__);
1167                 return -EFAULT;
1168         }
1169
1170         /* reset flag so SIGIO can restart */
1171         ioc->aen_event_read_flag = 0;
1172         return 0;
1173 }
1174
1175 /**
1176  * _ctl_do_reset - main handler for MPT2HARDRESET opcode
1177  * @ioc: per adapter object
1178  * @arg - user space buffer containing ioctl content
1179  */
1180 static long
1181 _ctl_do_reset(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1182 {
1183         struct mpt2_ioctl_diag_reset karg;
1184         int retval;
1185
1186         if (copy_from_user(&karg, arg, sizeof(karg))) {
1187                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1188                     __FILE__, __LINE__, __func__);
1189                 return -EFAULT;
1190         }
1191
1192         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1193                 ioc->is_driver_loading)
1194                 return -EAGAIN;
1195         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1196             __func__));
1197
1198         retval = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1199             FORCE_BIG_HAMMER);
1200         printk(MPT2SAS_INFO_FMT "host reset: %s\n",
1201             ioc->name, ((!retval) ? "SUCCESS" : "FAILED"));
1202         return 0;
1203 }
1204
1205 /**
1206  * _ctl_btdh_search_sas_device - searching for sas device
1207  * @ioc: per adapter object
1208  * @btdh: btdh ioctl payload
1209  */
1210 static int
1211 _ctl_btdh_search_sas_device(struct MPT2SAS_ADAPTER *ioc,
1212     struct mpt2_ioctl_btdh_mapping *btdh)
1213 {
1214         struct _sas_device *sas_device;
1215         unsigned long flags;
1216         int rc = 0;
1217
1218         if (list_empty(&ioc->sas_device_list))
1219                 return rc;
1220
1221         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1222         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1223                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1224                     btdh->handle == sas_device->handle) {
1225                         btdh->bus = sas_device->channel;
1226                         btdh->id = sas_device->id;
1227                         rc = 1;
1228                         goto out;
1229                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1230                     sas_device->id && btdh->handle == 0xFFFF) {
1231                         btdh->handle = sas_device->handle;
1232                         rc = 1;
1233                         goto out;
1234                 }
1235         }
1236  out:
1237         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1238         return rc;
1239 }
1240
1241 /**
1242  * _ctl_btdh_search_raid_device - searching for raid device
1243  * @ioc: per adapter object
1244  * @btdh: btdh ioctl payload
1245  */
1246 static int
1247 _ctl_btdh_search_raid_device(struct MPT2SAS_ADAPTER *ioc,
1248     struct mpt2_ioctl_btdh_mapping *btdh)
1249 {
1250         struct _raid_device *raid_device;
1251         unsigned long flags;
1252         int rc = 0;
1253
1254         if (list_empty(&ioc->raid_device_list))
1255                 return rc;
1256
1257         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1258         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1259                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1260                     btdh->handle == raid_device->handle) {
1261                         btdh->bus = raid_device->channel;
1262                         btdh->id = raid_device->id;
1263                         rc = 1;
1264                         goto out;
1265                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1266                     raid_device->id && btdh->handle == 0xFFFF) {
1267                         btdh->handle = raid_device->handle;
1268                         rc = 1;
1269                         goto out;
1270                 }
1271         }
1272  out:
1273         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1274         return rc;
1275 }
1276
1277 /**
1278  * _ctl_btdh_mapping - main handler for MPT2BTDHMAPPING opcode
1279  * @ioc: per adapter object
1280  * @arg - user space buffer containing ioctl content
1281  */
1282 static long
1283 _ctl_btdh_mapping(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1284 {
1285         struct mpt2_ioctl_btdh_mapping karg;
1286         int rc;
1287
1288         if (copy_from_user(&karg, arg, sizeof(karg))) {
1289                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1290                     __FILE__, __LINE__, __func__);
1291                 return -EFAULT;
1292         }
1293
1294         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1295             __func__));
1296
1297         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1298         if (!rc)
1299                 _ctl_btdh_search_raid_device(ioc, &karg);
1300
1301         if (copy_to_user(arg, &karg, sizeof(karg))) {
1302                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1303                     __FILE__, __LINE__, __func__);
1304                 return -EFAULT;
1305         }
1306         return 0;
1307 }
1308
1309 /**
1310  * _ctl_diag_capability - return diag buffer capability
1311  * @ioc: per adapter object
1312  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1313  *
1314  * returns 1 when diag buffer support is enabled in firmware
1315  */
1316 static u8
1317 _ctl_diag_capability(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type)
1318 {
1319         u8 rc = 0;
1320
1321         switch (buffer_type) {
1322         case MPI2_DIAG_BUF_TYPE_TRACE:
1323                 if (ioc->facts.IOCCapabilities &
1324                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1325                         rc = 1;
1326                 break;
1327         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1328                 if (ioc->facts.IOCCapabilities &
1329                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1330                         rc = 1;
1331                 break;
1332         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1333                 if (ioc->facts.IOCCapabilities &
1334                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1335                         rc = 1;
1336         }
1337
1338         return rc;
1339 }
1340
1341 /**
1342  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1343  * @ioc: per adapter object
1344  * @diag_register: the diag_register struct passed in from user space
1345  *
1346  */
1347 static long
1348 _ctl_diag_register_2(struct MPT2SAS_ADAPTER *ioc,
1349     struct mpt2_diag_register *diag_register)
1350 {
1351         int rc, i;
1352         void *request_data = NULL;
1353         dma_addr_t request_data_dma;
1354         u32 request_data_sz = 0;
1355         Mpi2DiagBufferPostRequest_t *mpi_request;
1356         Mpi2DiagBufferPostReply_t *mpi_reply;
1357         u8 buffer_type;
1358         unsigned long timeleft;
1359         u16 smid;
1360         u16 ioc_status;
1361         u8 issue_reset = 0;
1362
1363         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1364             __func__));
1365
1366         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1367                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1368                     ioc->name, __func__);
1369                 rc = -EAGAIN;
1370                 goto out;
1371         }
1372
1373         buffer_type = diag_register->buffer_type;
1374         if (!_ctl_diag_capability(ioc, buffer_type)) {
1375                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1376                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1377                 return -EPERM;
1378         }
1379
1380         if (ioc->diag_buffer_status[buffer_type] &
1381             MPT2_DIAG_BUFFER_IS_REGISTERED) {
1382                 printk(MPT2SAS_ERR_FMT "%s: already has a registered "
1383                     "buffer for buffer_type(0x%02x)\n", ioc->name, __func__,
1384                     buffer_type);
1385                 return -EINVAL;
1386         }
1387
1388         if (diag_register->requested_buffer_size % 4)  {
1389                 printk(MPT2SAS_ERR_FMT "%s: the requested_buffer_size "
1390                     "is not 4 byte aligned\n", ioc->name, __func__);
1391                 return -EINVAL;
1392         }
1393
1394         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1395         if (!smid) {
1396                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1397                     ioc->name, __func__);
1398                 rc = -EAGAIN;
1399                 goto out;
1400         }
1401
1402         rc = 0;
1403         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1404         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1405         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1406         ioc->ctl_cmds.smid = smid;
1407
1408         request_data = ioc->diag_buffer[buffer_type];
1409         request_data_sz = diag_register->requested_buffer_size;
1410         ioc->unique_id[buffer_type] = diag_register->unique_id;
1411         ioc->diag_buffer_status[buffer_type] = 0;
1412         memcpy(ioc->product_specific[buffer_type],
1413             diag_register->product_specific, MPT2_PRODUCT_SPECIFIC_DWORDS);
1414         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1415
1416         if (request_data) {
1417                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1418                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1419                         pci_free_consistent(ioc->pdev,
1420                             ioc->diag_buffer_sz[buffer_type],
1421                             request_data, request_data_dma);
1422                         request_data = NULL;
1423                 }
1424         }
1425
1426         if (request_data == NULL) {
1427                 ioc->diag_buffer_sz[buffer_type] = 0;
1428                 ioc->diag_buffer_dma[buffer_type] = 0;
1429                 request_data = pci_alloc_consistent(
1430                         ioc->pdev, request_data_sz, &request_data_dma);
1431                 if (request_data == NULL) {
1432                         printk(MPT2SAS_ERR_FMT "%s: failed allocating memory"
1433                             " for diag buffers, requested size(%d)\n",
1434                             ioc->name, __func__, request_data_sz);
1435                         mpt2sas_base_free_smid(ioc, smid);
1436                         return -ENOMEM;
1437                 }
1438                 ioc->diag_buffer[buffer_type] = request_data;
1439                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1440                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1441         }
1442
1443         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1444         mpi_request->BufferType = diag_register->buffer_type;
1445         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1446         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1447         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1448         mpi_request->VF_ID = 0; /* TODO */
1449         mpi_request->VP_ID = 0;
1450
1451         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(0x%p), "
1452             "dma(0x%llx), sz(%d)\n", ioc->name, __func__, request_data,
1453             (unsigned long long)request_data_dma,
1454             le32_to_cpu(mpi_request->BufferLength)));
1455
1456         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1457                 mpi_request->ProductSpecific[i] =
1458                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1459
1460         init_completion(&ioc->ctl_cmds.done);
1461         mpt2sas_base_put_smid_default(ioc, smid);
1462         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1463             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1464
1465         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1466                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1467                     __func__);
1468                 _debug_dump_mf(mpi_request,
1469                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
1470                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1471                         issue_reset = 1;
1472                 goto issue_host_reset;
1473         }
1474
1475         /* process the completed Reply Message Frame */
1476         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1477                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1478                     ioc->name, __func__);
1479                 rc = -EFAULT;
1480                 goto out;
1481         }
1482
1483         mpi_reply = ioc->ctl_cmds.reply;
1484         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1485
1486         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1487                 ioc->diag_buffer_status[buffer_type] |=
1488                         MPT2_DIAG_BUFFER_IS_REGISTERED;
1489                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1490                     ioc->name, __func__));
1491         } else {
1492                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1493                     "log_info(0x%08x)\n", ioc->name, __func__,
1494                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1495                 rc = -EFAULT;
1496         }
1497
1498  issue_host_reset:
1499         if (issue_reset)
1500                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1501                     FORCE_BIG_HAMMER);
1502
1503  out:
1504
1505         if (rc && request_data)
1506                 pci_free_consistent(ioc->pdev, request_data_sz,
1507                     request_data, request_data_dma);
1508
1509         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1510         return rc;
1511 }
1512
1513 /**
1514  * mpt2sas_enable_diag_buffer - enabling diag_buffers support driver load time
1515  * @ioc: per adapter object
1516  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1517  *
1518  * This is called when command line option diag_buffer_enable is enabled
1519  * at driver load time.
1520  */
1521 void
1522 mpt2sas_enable_diag_buffer(struct MPT2SAS_ADAPTER *ioc, u8 bits_to_register)
1523 {
1524         struct mpt2_diag_register diag_register;
1525
1526         memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
1527
1528         if (bits_to_register & 1) {
1529                 printk(MPT2SAS_INFO_FMT "registering trace buffer support\n",
1530                     ioc->name);
1531                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1532                 /* register for 1MB buffers  */
1533                 diag_register.requested_buffer_size = (1024 * 1024);
1534                 diag_register.unique_id = 0x7075900;
1535                 _ctl_diag_register_2(ioc,  &diag_register);
1536         }
1537
1538         if (bits_to_register & 2) {
1539                 printk(MPT2SAS_INFO_FMT "registering snapshot buffer support\n",
1540                     ioc->name);
1541                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1542                 /* register for 2MB buffers  */
1543                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1544                 diag_register.unique_id = 0x7075901;
1545                 _ctl_diag_register_2(ioc,  &diag_register);
1546         }
1547
1548         if (bits_to_register & 4) {
1549                 printk(MPT2SAS_INFO_FMT "registering extended buffer support\n",
1550                     ioc->name);
1551                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1552                 /* register for 2MB buffers  */
1553                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1554                 diag_register.unique_id = 0x7075901;
1555                 _ctl_diag_register_2(ioc,  &diag_register);
1556         }
1557 }
1558
1559 /**
1560  * _ctl_diag_register - application register with driver
1561  * @ioc: per adapter object
1562  * @arg - user space buffer containing ioctl content
1563  *
1564  * This will allow the driver to setup any required buffers that will be
1565  * needed by firmware to communicate with the driver.
1566  */
1567 static long
1568 _ctl_diag_register(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1569 {
1570         struct mpt2_diag_register karg;
1571         long rc;
1572
1573         if (copy_from_user(&karg, arg, sizeof(karg))) {
1574                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1575                     __FILE__, __LINE__, __func__);
1576                 return -EFAULT;
1577         }
1578
1579         rc = _ctl_diag_register_2(ioc, &karg);
1580         return rc;
1581 }
1582
1583 /**
1584  * _ctl_diag_unregister - application unregister with driver
1585  * @ioc: per adapter object
1586  * @arg - user space buffer containing ioctl content
1587  *
1588  * This will allow the driver to cleanup any memory allocated for diag
1589  * messages and to free up any resources.
1590  */
1591 static long
1592 _ctl_diag_unregister(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1593 {
1594         struct mpt2_diag_unregister karg;
1595         void *request_data;
1596         dma_addr_t request_data_dma;
1597         u32 request_data_sz;
1598         u8 buffer_type;
1599
1600         if (copy_from_user(&karg, arg, sizeof(karg))) {
1601                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1602                     __FILE__, __LINE__, __func__);
1603                 return -EFAULT;
1604         }
1605
1606         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1607             __func__));
1608
1609         buffer_type = karg.unique_id & 0x000000ff;
1610         if (!_ctl_diag_capability(ioc, buffer_type)) {
1611                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1612                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1613                 return -EPERM;
1614         }
1615
1616         if ((ioc->diag_buffer_status[buffer_type] &
1617             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1618                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1619                     "registered\n", ioc->name, __func__, buffer_type);
1620                 return -EINVAL;
1621         }
1622         if ((ioc->diag_buffer_status[buffer_type] &
1623             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
1624                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) has not been "
1625                     "released\n", ioc->name, __func__, buffer_type);
1626                 return -EINVAL;
1627         }
1628
1629         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1630                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1631                     "registered\n", ioc->name, __func__, karg.unique_id);
1632                 return -EINVAL;
1633         }
1634
1635         request_data = ioc->diag_buffer[buffer_type];
1636         if (!request_data) {
1637                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1638                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1639                 return -ENOMEM;
1640         }
1641
1642         request_data_sz = ioc->diag_buffer_sz[buffer_type];
1643         request_data_dma = ioc->diag_buffer_dma[buffer_type];
1644         pci_free_consistent(ioc->pdev, request_data_sz,
1645             request_data, request_data_dma);
1646         ioc->diag_buffer[buffer_type] = NULL;
1647         ioc->diag_buffer_status[buffer_type] = 0;
1648         return 0;
1649 }
1650
1651 /**
1652  * _ctl_diag_query - query relevant info associated with diag buffers
1653  * @ioc: per adapter object
1654  * @arg - user space buffer containing ioctl content
1655  *
1656  * The application will send only buffer_type and unique_id.  Driver will
1657  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
1658  * 0x00, the driver will return info specified by Buffer Type.
1659  */
1660 static long
1661 _ctl_diag_query(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1662 {
1663         struct mpt2_diag_query karg;
1664         void *request_data;
1665         int i;
1666         u8 buffer_type;
1667
1668         if (copy_from_user(&karg, arg, sizeof(karg))) {
1669                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1670                     __FILE__, __LINE__, __func__);
1671                 return -EFAULT;
1672         }
1673
1674         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1675             __func__));
1676
1677         karg.application_flags = 0;
1678         buffer_type = karg.buffer_type;
1679
1680         if (!_ctl_diag_capability(ioc, buffer_type)) {
1681                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1682                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1683                 return -EPERM;
1684         }
1685
1686         if ((ioc->diag_buffer_status[buffer_type] &
1687             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1688                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1689                     "registered\n", ioc->name, __func__, buffer_type);
1690                 return -EINVAL;
1691         }
1692
1693         if (karg.unique_id & 0xffffff00) {
1694                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
1695                         printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1696                             "registered\n", ioc->name, __func__,
1697                             karg.unique_id);
1698                         return -EINVAL;
1699                 }
1700         }
1701
1702         request_data = ioc->diag_buffer[buffer_type];
1703         if (!request_data) {
1704                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1705                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1706                 return -ENOMEM;
1707         }
1708
1709         if (ioc->diag_buffer_status[buffer_type] & MPT2_DIAG_BUFFER_IS_RELEASED)
1710                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1711                     MPT2_APP_FLAGS_BUFFER_VALID);
1712         else
1713                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1714                     MPT2_APP_FLAGS_BUFFER_VALID |
1715                     MPT2_APP_FLAGS_FW_BUFFER_ACCESS);
1716
1717         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1718                 karg.product_specific[i] =
1719                     ioc->product_specific[buffer_type][i];
1720
1721         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
1722         karg.driver_added_buffer_size = 0;
1723         karg.unique_id = ioc->unique_id[buffer_type];
1724         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
1725
1726         if (copy_to_user(arg, &karg, sizeof(struct mpt2_diag_query))) {
1727                 printk(MPT2SAS_ERR_FMT "%s: unable to write mpt2_diag_query "
1728                     "data @ %p\n", ioc->name, __func__, arg);
1729                 return -EFAULT;
1730         }
1731         return 0;
1732 }
1733
1734 /**
1735  * _ctl_send_release - Diag Release Message
1736  * @ioc: per adapter object
1737  * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
1738  * @issue_reset - specifies whether host reset is required.
1739  *
1740  */
1741 static int
1742 _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type, u8 *issue_reset)
1743 {
1744         Mpi2DiagReleaseRequest_t *mpi_request;
1745         Mpi2DiagReleaseReply_t *mpi_reply;
1746         u16 smid;
1747         u16 ioc_status;
1748         u32 ioc_state;
1749         int rc;
1750         unsigned long timeleft;
1751
1752         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1753             __func__));
1754
1755         rc = 0;
1756         *issue_reset = 0;
1757
1758         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1759         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1760                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
1761                     "skipping due to FAULT state\n", ioc->name,
1762                     __func__));
1763                 rc = -EAGAIN;
1764                 goto out;
1765         }
1766
1767         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1768                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1769                     ioc->name, __func__);
1770                 rc = -EAGAIN;
1771                 goto out;
1772         }
1773
1774         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1775         if (!smid) {
1776                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1777                     ioc->name, __func__);
1778                 rc = -EAGAIN;
1779                 goto out;
1780         }
1781
1782         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1783         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1784         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1785         ioc->ctl_cmds.smid = smid;
1786
1787         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
1788         mpi_request->BufferType = buffer_type;
1789         mpi_request->VF_ID = 0; /* TODO */
1790         mpi_request->VP_ID = 0;
1791
1792         init_completion(&ioc->ctl_cmds.done);
1793         mpt2sas_base_put_smid_default(ioc, smid);
1794         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1795             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1796
1797         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1798                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1799                     __func__);
1800                 _debug_dump_mf(mpi_request,
1801                     sizeof(Mpi2DiagReleaseRequest_t)/4);
1802                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1803                         *issue_reset = 1;
1804                 rc = -EFAULT;
1805                 goto out;
1806         }
1807
1808         /* process the completed Reply Message Frame */
1809         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1810                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1811                     ioc->name, __func__);
1812                 rc = -EFAULT;
1813                 goto out;
1814         }
1815
1816         mpi_reply = ioc->ctl_cmds.reply;
1817         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1818
1819         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1820                 ioc->diag_buffer_status[buffer_type] |=
1821                     MPT2_DIAG_BUFFER_IS_RELEASED;
1822                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1823                     ioc->name, __func__));
1824         } else {
1825                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1826                     "log_info(0x%08x)\n", ioc->name, __func__,
1827                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1828                 rc = -EFAULT;
1829         }
1830
1831  out:
1832         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1833         return rc;
1834 }
1835
1836 /**
1837  * _ctl_diag_release - request to send Diag Release Message to firmware
1838  * @arg - user space buffer containing ioctl content
1839  *
1840  * This allows ownership of the specified buffer to returned to the driver,
1841  * allowing an application to read the buffer without fear that firmware is
1842  * overwritting information in the buffer.
1843  */
1844 static long
1845 _ctl_diag_release(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1846 {
1847         struct mpt2_diag_release karg;
1848         void *request_data;
1849         int rc;
1850         u8 buffer_type;
1851         u8 issue_reset = 0;
1852
1853         if (copy_from_user(&karg, arg, sizeof(karg))) {
1854                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1855                     __FILE__, __LINE__, __func__);
1856                 return -EFAULT;
1857         }
1858
1859         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1860             __func__));
1861
1862         buffer_type = karg.unique_id & 0x000000ff;
1863         if (!_ctl_diag_capability(ioc, buffer_type)) {
1864                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1865                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1866                 return -EPERM;
1867         }
1868
1869         if ((ioc->diag_buffer_status[buffer_type] &
1870             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1871                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1872                     "registered\n", ioc->name, __func__, buffer_type);
1873                 return -EINVAL;
1874         }
1875
1876         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1877                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1878                     "registered\n", ioc->name, __func__, karg.unique_id);
1879                 return -EINVAL;
1880         }
1881
1882         if (ioc->diag_buffer_status[buffer_type] &
1883             MPT2_DIAG_BUFFER_IS_RELEASED) {
1884                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1885                     "is already released\n", ioc->name, __func__,
1886                     buffer_type);
1887                 return 0;
1888         }
1889
1890         request_data = ioc->diag_buffer[buffer_type];
1891
1892         if (!request_data) {
1893                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1894                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1895                 return -ENOMEM;
1896         }
1897
1898         /* buffers were released by due to host reset */
1899         if ((ioc->diag_buffer_status[buffer_type] &
1900             MPT2_DIAG_BUFFER_IS_DIAG_RESET)) {
1901                 ioc->diag_buffer_status[buffer_type] |=
1902                     MPT2_DIAG_BUFFER_IS_RELEASED;
1903                 ioc->diag_buffer_status[buffer_type] &=
1904                     ~MPT2_DIAG_BUFFER_IS_DIAG_RESET;
1905                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1906                     "was released due to host reset\n", ioc->name, __func__,
1907                     buffer_type);
1908                 return 0;
1909         }
1910
1911         rc = _ctl_send_release(ioc, buffer_type, &issue_reset);
1912
1913         if (issue_reset)
1914                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1915                     FORCE_BIG_HAMMER);
1916
1917         return rc;
1918 }
1919
1920 /**
1921  * _ctl_diag_read_buffer - request for copy of the diag buffer
1922  * @ioc: per adapter object
1923  * @arg - user space buffer containing ioctl content
1924  */
1925 static long
1926 _ctl_diag_read_buffer(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1927 {
1928         struct mpt2_diag_read_buffer karg;
1929         struct mpt2_diag_read_buffer __user *uarg = arg;
1930         void *request_data, *diag_data;
1931         Mpi2DiagBufferPostRequest_t *mpi_request;
1932         Mpi2DiagBufferPostReply_t *mpi_reply;
1933         int rc, i;
1934         u8 buffer_type;
1935         unsigned long timeleft, request_size, copy_size;
1936         u16 smid;
1937         u16 ioc_status;
1938         u8 issue_reset = 0;
1939
1940         if (copy_from_user(&karg, arg, sizeof(karg))) {
1941                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1942                     __FILE__, __LINE__, __func__);
1943                 return -EFAULT;
1944         }
1945
1946         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1947             __func__));
1948
1949         buffer_type = karg.unique_id & 0x000000ff;
1950         if (!_ctl_diag_capability(ioc, buffer_type)) {
1951                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1952                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1953                 return -EPERM;
1954         }
1955
1956         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1957                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1958                     "registered\n", ioc->name, __func__, karg.unique_id);
1959                 return -EINVAL;
1960         }
1961
1962         request_data = ioc->diag_buffer[buffer_type];
1963         if (!request_data) {
1964                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1965                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1966                 return -ENOMEM;
1967         }
1968
1969         request_size = ioc->diag_buffer_sz[buffer_type];
1970
1971         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
1972                 printk(MPT2SAS_ERR_FMT "%s: either the starting_offset "
1973                     "or bytes_to_read are not 4 byte aligned\n", ioc->name,
1974                     __func__);
1975                 return -EINVAL;
1976         }
1977
1978         if (karg.starting_offset > request_size)
1979                 return -EINVAL;
1980
1981         diag_data = (void *)(request_data + karg.starting_offset);
1982         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(%p), "
1983             "offset(%d), sz(%d)\n", ioc->name, __func__,
1984             diag_data, karg.starting_offset, karg.bytes_to_read));
1985
1986         /* Truncate data on requests that are too large */
1987         if ((diag_data + karg.bytes_to_read < diag_data) ||
1988             (diag_data + karg.bytes_to_read > request_data + request_size))
1989                 copy_size = request_size - karg.starting_offset;
1990         else
1991                 copy_size = karg.bytes_to_read;
1992
1993         if (copy_to_user((void __user *)uarg->diagnostic_data,
1994             diag_data, copy_size)) {
1995                 printk(MPT2SAS_ERR_FMT "%s: Unable to write "
1996                     "mpt_diag_read_buffer_t data @ %p\n", ioc->name,
1997                     __func__, diag_data);
1998                 return -EFAULT;
1999         }
2000
2001         if ((karg.flags & MPT2_FLAGS_REREGISTER) == 0)
2002                 return 0;
2003
2004         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: Reregister "
2005                 "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type));
2006         if ((ioc->diag_buffer_status[buffer_type] &
2007             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
2008                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2009                     "buffer_type(0x%02x) is still registered\n", ioc->name,
2010                      __func__, buffer_type));
2011                 return 0;
2012         }
2013         /* Get a free request frame and save the message context.
2014         */
2015
2016         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
2017                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
2018                     ioc->name, __func__);
2019                 rc = -EAGAIN;
2020                 goto out;
2021         }
2022
2023         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2024         if (!smid) {
2025                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2026                     ioc->name, __func__);
2027                 rc = -EAGAIN;
2028                 goto out;
2029         }
2030
2031         rc = 0;
2032         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
2033         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2034         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2035         ioc->ctl_cmds.smid = smid;
2036
2037         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2038         mpi_request->BufferType = buffer_type;
2039         mpi_request->BufferLength =
2040             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2041         mpi_request->BufferAddress =
2042             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2043         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
2044                 mpi_request->ProductSpecific[i] =
2045                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2046         mpi_request->VF_ID = 0; /* TODO */
2047         mpi_request->VP_ID = 0;
2048
2049         init_completion(&ioc->ctl_cmds.done);
2050         mpt2sas_base_put_smid_default(ioc, smid);
2051         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
2052             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
2053
2054         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
2055                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
2056                     __func__);
2057                 _debug_dump_mf(mpi_request,
2058                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
2059                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
2060                         issue_reset = 1;
2061                 goto issue_host_reset;
2062         }
2063
2064         /* process the completed Reply Message Frame */
2065         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
2066                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
2067                     ioc->name, __func__);
2068                 rc = -EFAULT;
2069                 goto out;
2070         }
2071
2072         mpi_reply = ioc->ctl_cmds.reply;
2073         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2074
2075         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2076                 ioc->diag_buffer_status[buffer_type] |=
2077                     MPT2_DIAG_BUFFER_IS_REGISTERED;
2078                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
2079                     ioc->name, __func__));
2080         } else {
2081                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
2082                     "log_info(0x%08x)\n", ioc->name, __func__,
2083                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2084                 rc = -EFAULT;
2085         }
2086
2087  issue_host_reset:
2088         if (issue_reset)
2089                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2090                     FORCE_BIG_HAMMER);
2091
2092  out:
2093
2094         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
2095         return rc;
2096 }
2097
2098
2099 #ifdef CONFIG_COMPAT
2100 /**
2101  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2102  * @ioc: per adapter object
2103  * @cmd - ioctl opcode
2104  * @arg - (struct mpt2_ioctl_command32)
2105  *
2106  * MPT2COMMAND32 - Handle 32bit applications running on 64bit os.
2107  */
2108 static long
2109 _ctl_compat_mpt_command(struct MPT2SAS_ADAPTER *ioc, unsigned cmd,
2110         void __user *arg)
2111 {
2112         struct mpt2_ioctl_command32 karg32;
2113         struct mpt2_ioctl_command32 __user *uarg;
2114         struct mpt2_ioctl_command karg;
2115
2116         if (_IOC_SIZE(cmd) != sizeof(struct mpt2_ioctl_command32))
2117                 return -EINVAL;
2118
2119         uarg = (struct mpt2_ioctl_command32 __user *) arg;
2120
2121         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2122                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2123                     __FILE__, __LINE__, __func__);
2124                 return -EFAULT;
2125         }
2126
2127         memset(&karg, 0, sizeof(struct mpt2_ioctl_command));
2128         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2129         karg.hdr.port_number = karg32.hdr.port_number;
2130         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2131         karg.timeout = karg32.timeout;
2132         karg.max_reply_bytes = karg32.max_reply_bytes;
2133         karg.data_in_size = karg32.data_in_size;
2134         karg.data_out_size = karg32.data_out_size;
2135         karg.max_sense_bytes = karg32.max_sense_bytes;
2136         karg.data_sge_offset = karg32.data_sge_offset;
2137         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2138         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2139         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2140         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2141         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2142 }
2143 #endif
2144
2145 /**
2146  * _ctl_ioctl_main - main ioctl entry point
2147  * @file - (struct file)
2148  * @cmd - ioctl opcode
2149  * @arg -
2150  * compat - handles 32 bit applications in 64bit os
2151  */
2152 static long
2153 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2154         u8 compat)
2155 {
2156         struct MPT2SAS_ADAPTER *ioc;
2157         struct mpt2_ioctl_header ioctl_header;
2158         enum block_state state;
2159         long ret = -EINVAL;
2160
2161         /* get IOCTL header */
2162         if (copy_from_user(&ioctl_header, (char __user *)arg,
2163             sizeof(struct mpt2_ioctl_header))) {
2164                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2165                     __FILE__, __LINE__, __func__);
2166                 return -EFAULT;
2167         }
2168
2169         if (_ctl_verify_adapter(ioctl_header.ioc_number, &ioc) == -1 || !ioc)
2170                 return -ENODEV;
2171         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2172             ioc->is_driver_loading)
2173                 return -EAGAIN;
2174
2175         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2176         if (state == NON_BLOCKING) {
2177                 if (!mutex_trylock(&ioc->ctl_cmds.mutex))
2178                         return -EAGAIN;
2179         } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2180                 return -ERESTARTSYS;
2181         }
2182
2183         switch (cmd) {
2184         case MPT2IOCINFO:
2185                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_iocinfo))
2186                         ret = _ctl_getiocinfo(ioc, arg);
2187                 break;
2188 #ifdef CONFIG_COMPAT
2189         case MPT2COMMAND32:
2190 #endif
2191         case MPT2COMMAND:
2192         {
2193                 struct mpt2_ioctl_command __user *uarg;
2194                 struct mpt2_ioctl_command karg;
2195 #ifdef CONFIG_COMPAT
2196                 if (compat) {
2197                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2198                         break;
2199                 }
2200 #endif
2201                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2202                         printk(KERN_ERR "failure at %s:%d/%s()!\n",
2203                             __FILE__, __LINE__, __func__);
2204                         ret = -EFAULT;
2205                         break;
2206                 }
2207
2208                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_command)) {
2209                         uarg = arg;
2210                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2211                 }
2212                 break;
2213         }
2214         case MPT2EVENTQUERY:
2215                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventquery))
2216                         ret = _ctl_eventquery(ioc, arg);
2217                 break;
2218         case MPT2EVENTENABLE:
2219                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventenable))
2220                         ret = _ctl_eventenable(ioc, arg);
2221                 break;
2222         case MPT2EVENTREPORT:
2223                 ret = _ctl_eventreport(ioc, arg);
2224                 break;
2225         case MPT2HARDRESET:
2226                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_diag_reset))
2227                         ret = _ctl_do_reset(ioc, arg);
2228                 break;
2229         case MPT2BTDHMAPPING:
2230                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_btdh_mapping))
2231                         ret = _ctl_btdh_mapping(ioc, arg);
2232                 break;
2233         case MPT2DIAGREGISTER:
2234                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_register))
2235                         ret = _ctl_diag_register(ioc, arg);
2236                 break;
2237         case MPT2DIAGUNREGISTER:
2238                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_unregister))
2239                         ret = _ctl_diag_unregister(ioc, arg);
2240                 break;
2241         case MPT2DIAGQUERY:
2242                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_query))
2243                         ret = _ctl_diag_query(ioc, arg);
2244                 break;
2245         case MPT2DIAGRELEASE:
2246                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_release))
2247                         ret = _ctl_diag_release(ioc, arg);
2248                 break;
2249         case MPT2DIAGREADBUFFER:
2250                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_read_buffer))
2251                         ret = _ctl_diag_read_buffer(ioc, arg);
2252                 break;
2253         default:
2254
2255                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT
2256                     "unsupported ioctl opcode(0x%08x)\n", ioc->name, cmd));
2257                 break;
2258         }
2259
2260         mutex_unlock(&ioc->ctl_cmds.mutex);
2261         return ret;
2262 }
2263
2264 /**
2265  * _ctl_ioctl - main ioctl entry point (unlocked)
2266  * @file - (struct file)
2267  * @cmd - ioctl opcode
2268  * @arg -
2269  */
2270 static long
2271 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2272 {
2273         long ret;
2274
2275         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0);
2276         return ret;
2277 }
2278 #ifdef CONFIG_COMPAT
2279 /**
2280  * _ctl_ioctl_compat - main ioctl entry point (compat)
2281  * @file -
2282  * @cmd -
2283  * @arg -
2284  *
2285  * This routine handles 32 bit applications in 64bit os.
2286  */
2287 static long
2288 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2289 {
2290         long ret;
2291
2292         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1);
2293         return ret;
2294 }
2295 #endif
2296
2297 /* scsi host attributes */
2298
2299 /**
2300  * _ctl_version_fw_show - firmware version
2301  * @cdev - pointer to embedded class device
2302  * @buf - the buffer returned
2303  *
2304  * A sysfs 'read-only' shost attribute.
2305  */
2306 static ssize_t
2307 _ctl_version_fw_show(struct device *cdev, struct device_attribute *attr,
2308     char *buf)
2309 {
2310         struct Scsi_Host *shost = class_to_shost(cdev);
2311         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2312
2313         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2314             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2315             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2316             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2317             ioc->facts.FWVersion.Word & 0x000000FF);
2318 }
2319 static DEVICE_ATTR(version_fw, S_IRUGO, _ctl_version_fw_show, NULL);
2320
2321 /**
2322  * _ctl_version_bios_show - bios version
2323  * @cdev - pointer to embedded class device
2324  * @buf - the buffer returned
2325  *
2326  * A sysfs 'read-only' shost attribute.
2327  */
2328 static ssize_t
2329 _ctl_version_bios_show(struct device *cdev, struct device_attribute *attr,
2330     char *buf)
2331 {
2332         struct Scsi_Host *shost = class_to_shost(cdev);
2333         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2334
2335         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2336
2337         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2338             (version & 0xFF000000) >> 24,
2339             (version & 0x00FF0000) >> 16,
2340             (version & 0x0000FF00) >> 8,
2341             version & 0x000000FF);
2342 }
2343 static DEVICE_ATTR(version_bios, S_IRUGO, _ctl_version_bios_show, NULL);
2344
2345 /**
2346  * _ctl_version_mpi_show - MPI (message passing interface) version
2347  * @cdev - pointer to embedded class device
2348  * @buf - the buffer returned
2349  *
2350  * A sysfs 'read-only' shost attribute.
2351  */
2352 static ssize_t
2353 _ctl_version_mpi_show(struct device *cdev, struct device_attribute *attr,
2354     char *buf)
2355 {
2356         struct Scsi_Host *shost = class_to_shost(cdev);
2357         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2358
2359         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2360             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2361 }
2362 static DEVICE_ATTR(version_mpi, S_IRUGO, _ctl_version_mpi_show, NULL);
2363
2364 /**
2365  * _ctl_version_product_show - product name
2366  * @cdev - pointer to embedded class device
2367  * @buf - the buffer returned
2368  *
2369  * A sysfs 'read-only' shost attribute.
2370  */
2371 static ssize_t
2372 _ctl_version_product_show(struct device *cdev, struct device_attribute *attr,
2373     char *buf)
2374 {
2375         struct Scsi_Host *shost = class_to_shost(cdev);
2376         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2377
2378         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2379 }
2380 static DEVICE_ATTR(version_product, S_IRUGO,
2381    _ctl_version_product_show, NULL);
2382
2383 /**
2384  * _ctl_version_nvdata_persistent_show - ndvata persistent version
2385  * @cdev - pointer to embedded class device
2386  * @buf - the buffer returned
2387  *
2388  * A sysfs 'read-only' shost attribute.
2389  */
2390 static ssize_t
2391 _ctl_version_nvdata_persistent_show(struct device *cdev,
2392     struct device_attribute *attr, char *buf)
2393 {
2394         struct Scsi_Host *shost = class_to_shost(cdev);
2395         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2396
2397         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2398             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2399 }
2400 static DEVICE_ATTR(version_nvdata_persistent, S_IRUGO,
2401     _ctl_version_nvdata_persistent_show, NULL);
2402
2403 /**
2404  * _ctl_version_nvdata_default_show - nvdata default version
2405  * @cdev - pointer to embedded class device
2406  * @buf - the buffer returned
2407  *
2408  * A sysfs 'read-only' shost attribute.
2409  */
2410 static ssize_t
2411 _ctl_version_nvdata_default_show(struct device *cdev,
2412     struct device_attribute *attr, char *buf)
2413 {
2414         struct Scsi_Host *shost = class_to_shost(cdev);
2415         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2416
2417         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2418             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2419 }
2420 static DEVICE_ATTR(version_nvdata_default, S_IRUGO,
2421     _ctl_version_nvdata_default_show, NULL);
2422
2423 /**
2424  * _ctl_board_name_show - board name
2425  * @cdev - pointer to embedded class device
2426  * @buf - the buffer returned
2427  *
2428  * A sysfs 'read-only' shost attribute.
2429  */
2430 static ssize_t
2431 _ctl_board_name_show(struct device *cdev, struct device_attribute *attr,
2432     char *buf)
2433 {
2434         struct Scsi_Host *shost = class_to_shost(cdev);
2435         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2436
2437         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2438 }
2439 static DEVICE_ATTR(board_name, S_IRUGO, _ctl_board_name_show, NULL);
2440
2441 /**
2442  * _ctl_board_assembly_show - board assembly name
2443  * @cdev - pointer to embedded class device
2444  * @buf - the buffer returned
2445  *
2446  * A sysfs 'read-only' shost attribute.
2447  */
2448 static ssize_t
2449 _ctl_board_assembly_show(struct device *cdev, struct device_attribute *attr,
2450     char *buf)
2451 {
2452         struct Scsi_Host *shost = class_to_shost(cdev);
2453         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2454
2455         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2456 }
2457 static DEVICE_ATTR(board_assembly, S_IRUGO,
2458     _ctl_board_assembly_show, NULL);
2459
2460 /**
2461  * _ctl_board_tracer_show - board tracer number
2462  * @cdev - pointer to embedded class device
2463  * @buf - the buffer returned
2464  *
2465  * A sysfs 'read-only' shost attribute.
2466  */
2467 static ssize_t
2468 _ctl_board_tracer_show(struct device *cdev, struct device_attribute *attr,
2469     char *buf)
2470 {
2471         struct Scsi_Host *shost = class_to_shost(cdev);
2472         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2473
2474         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2475 }
2476 static DEVICE_ATTR(board_tracer, S_IRUGO,
2477     _ctl_board_tracer_show, NULL);
2478
2479 /**
2480  * _ctl_io_delay_show - io missing delay
2481  * @cdev - pointer to embedded class device
2482  * @buf - the buffer returned
2483  *
2484  * This is for firmware implemention for deboucing device
2485  * removal events.
2486  *
2487  * A sysfs 'read-only' shost attribute.
2488  */
2489 static ssize_t
2490 _ctl_io_delay_show(struct device *cdev, struct device_attribute *attr,
2491     char *buf)
2492 {
2493         struct Scsi_Host *shost = class_to_shost(cdev);
2494         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2495
2496         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
2497 }
2498 static DEVICE_ATTR(io_delay, S_IRUGO,
2499     _ctl_io_delay_show, NULL);
2500
2501 /**
2502  * _ctl_device_delay_show - device missing delay
2503  * @cdev - pointer to embedded class device
2504  * @buf - the buffer returned
2505  *
2506  * This is for firmware implemention for deboucing device
2507  * removal events.
2508  *
2509  * A sysfs 'read-only' shost attribute.
2510  */
2511 static ssize_t
2512 _ctl_device_delay_show(struct device *cdev, struct device_attribute *attr,
2513     char *buf)
2514 {
2515         struct Scsi_Host *shost = class_to_shost(cdev);
2516         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2517
2518         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
2519 }
2520 static DEVICE_ATTR(device_delay, S_IRUGO,
2521     _ctl_device_delay_show, NULL);
2522
2523 /**
2524  * _ctl_fw_queue_depth_show - global credits
2525  * @cdev - pointer to embedded class device
2526  * @buf - the buffer returned
2527  *
2528  * This is firmware queue depth limit
2529  *
2530  * A sysfs 'read-only' shost attribute.
2531  */
2532 static ssize_t
2533 _ctl_fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
2534     char *buf)
2535 {
2536         struct Scsi_Host *shost = class_to_shost(cdev);
2537         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2538
2539         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
2540 }
2541 static DEVICE_ATTR(fw_queue_depth, S_IRUGO,
2542     _ctl_fw_queue_depth_show, NULL);
2543
2544 /**
2545  * _ctl_sas_address_show - sas address
2546  * @cdev - pointer to embedded class device
2547  * @buf - the buffer returned
2548  *
2549  * This is the controller sas address
2550  *
2551  * A sysfs 'read-only' shost attribute.
2552  */
2553 static ssize_t
2554 _ctl_host_sas_address_show(struct device *cdev, struct device_attribute *attr,
2555     char *buf)
2556 {
2557         struct Scsi_Host *shost = class_to_shost(cdev);
2558         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2559
2560         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2561             (unsigned long long)ioc->sas_hba.sas_address);
2562 }
2563 static DEVICE_ATTR(host_sas_address, S_IRUGO,
2564     _ctl_host_sas_address_show, NULL);
2565
2566 /**
2567  * _ctl_logging_level_show - logging level
2568  * @cdev - pointer to embedded class device
2569  * @buf - the buffer returned
2570  *
2571  * A sysfs 'read/write' shost attribute.
2572  */
2573 static ssize_t
2574 _ctl_logging_level_show(struct device *cdev, struct device_attribute *attr,
2575     char *buf)
2576 {
2577         struct Scsi_Host *shost = class_to_shost(cdev);
2578         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2579
2580         return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
2581 }
2582 static ssize_t
2583 _ctl_logging_level_store(struct device *cdev, struct device_attribute *attr,
2584     const char *buf, size_t count)
2585 {
2586         struct Scsi_Host *shost = class_to_shost(cdev);
2587         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2588         int val = 0;
2589
2590         if (sscanf(buf, "%x", &val) != 1)
2591                 return -EINVAL;
2592
2593         ioc->logging_level = val;
2594         printk(MPT2SAS_INFO_FMT "logging_level=%08xh\n", ioc->name,
2595             ioc->logging_level);
2596         return strlen(buf);
2597 }
2598 static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR,
2599     _ctl_logging_level_show, _ctl_logging_level_store);
2600
2601 /* device attributes */
2602 /*
2603  * _ctl_fwfault_debug_show - show/store fwfault_debug
2604  * @cdev - pointer to embedded class device
2605  * @buf - the buffer returned
2606  *
2607  * mpt2sas_fwfault_debug is command line option
2608  * A sysfs 'read/write' shost attribute.
2609  */
2610 static ssize_t
2611 _ctl_fwfault_debug_show(struct device *cdev,
2612     struct device_attribute *attr, char *buf)
2613 {
2614         struct Scsi_Host *shost = class_to_shost(cdev);
2615         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2616
2617         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
2618 }
2619 static ssize_t
2620 _ctl_fwfault_debug_store(struct device *cdev,
2621     struct device_attribute *attr, const char *buf, size_t count)
2622 {
2623         struct Scsi_Host *shost = class_to_shost(cdev);
2624         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2625         int val = 0;
2626
2627         if (sscanf(buf, "%d", &val) != 1)
2628                 return -EINVAL;
2629
2630         ioc->fwfault_debug = val;
2631         printk(MPT2SAS_INFO_FMT "fwfault_debug=%d\n", ioc->name,
2632             ioc->fwfault_debug);
2633         return strlen(buf);
2634 }
2635 static DEVICE_ATTR(fwfault_debug, S_IRUGO | S_IWUSR,
2636     _ctl_fwfault_debug_show, _ctl_fwfault_debug_store);
2637
2638
2639 /**
2640  * _ctl_ioc_reset_count_show - ioc reset count
2641  * @cdev - pointer to embedded class device
2642  * @buf - the buffer returned
2643  *
2644  * This is firmware queue depth limit
2645  *
2646  * A sysfs 'read-only' shost attribute.
2647  */
2648 static ssize_t
2649 _ctl_ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
2650     char *buf)
2651 {
2652         struct Scsi_Host *shost = class_to_shost(cdev);
2653         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2654
2655         return snprintf(buf, PAGE_SIZE, "%08d\n", ioc->ioc_reset_count);
2656 }
2657 static DEVICE_ATTR(ioc_reset_count, S_IRUGO,
2658     _ctl_ioc_reset_count_show, NULL);
2659
2660 /**
2661  * _ctl_ioc_reply_queue_count_show - number of reply queues
2662  * @cdev - pointer to embedded class device
2663  * @buf - the buffer returned
2664  *
2665  * This is number of reply queues
2666  *
2667  * A sysfs 'read-only' shost attribute.
2668  */
2669 static ssize_t
2670 _ctl_ioc_reply_queue_count_show(struct device *cdev,
2671          struct device_attribute *attr, char *buf)
2672 {
2673         u8 reply_queue_count;
2674         struct Scsi_Host *shost = class_to_shost(cdev);
2675         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2676
2677         if ((ioc->facts.IOCCapabilities &
2678             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
2679                 reply_queue_count = ioc->reply_queue_count;
2680         else
2681                 reply_queue_count = 1;
2682         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
2683 }
2684 static DEVICE_ATTR(reply_queue_count, S_IRUGO,
2685          _ctl_ioc_reply_queue_count_show, NULL);
2686
2687 /**
2688  * _ctl_BRM_status_show - Backup Rail Monitor Status
2689  * @cdev - pointer to embedded class device
2690  * @buf - the buffer returned
2691  *
2692  * This is number of reply queues
2693  *
2694  * A sysfs 'read-only' shost attribute.
2695  */
2696 static ssize_t
2697 _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr,
2698         char *buf)
2699 {
2700         struct Scsi_Host *shost = class_to_shost(cdev);
2701         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2702         Mpi2IOUnitPage3_t *io_unit_pg3 = NULL;
2703         Mpi2ConfigReply_t mpi_reply;
2704         u16 backup_rail_monitor_status = 0;
2705         u16 ioc_status;
2706         int sz;
2707         ssize_t rc = 0;
2708
2709         if (!ioc->is_warpdrive) {
2710                 printk(MPT2SAS_ERR_FMT "%s: BRM attribute is only for"\
2711                     "warpdrive\n", ioc->name, __func__);
2712                 goto out;
2713         }
2714
2715         /* allocate upto GPIOVal 36 entries */
2716         sz = offsetof(Mpi2IOUnitPage3_t, GPIOVal) + (sizeof(u16) * 36);
2717         io_unit_pg3 = kzalloc(sz, GFP_KERNEL);
2718         if (!io_unit_pg3) {
2719                 printk(MPT2SAS_ERR_FMT "%s: failed allocating memory"\
2720                     "for iounit_pg3: (%d) bytes\n", ioc->name, __func__, sz);
2721                 goto out;
2722         }
2723
2724         if (mpt2sas_config_get_iounit_pg3(ioc, &mpi_reply, io_unit_pg3, sz) !=
2725             0) {
2726                 printk(MPT2SAS_ERR_FMT
2727                     "%s: failed reading iounit_pg3\n", ioc->name,
2728                     __func__);
2729                 goto out;
2730         }
2731
2732         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
2733         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
2734                 printk(MPT2SAS_ERR_FMT "%s: iounit_pg3 failed with"\
2735                     "ioc_status(0x%04x)\n", ioc->name, __func__, ioc_status);
2736                 goto out;
2737         }
2738
2739         if (io_unit_pg3->GPIOCount < 25) {
2740                 printk(MPT2SAS_ERR_FMT "%s: iounit_pg3->GPIOCount less than"\
2741                      "25 entries, detected (%d) entries\n", ioc->name, __func__,
2742                     io_unit_pg3->GPIOCount);
2743                 goto out;
2744         }
2745
2746         /* BRM status is in bit zero of GPIOVal[24] */
2747         backup_rail_monitor_status = le16_to_cpu(io_unit_pg3->GPIOVal[24]);
2748         rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
2749
2750  out:
2751         kfree(io_unit_pg3);
2752         return rc;
2753 }
2754 static DEVICE_ATTR(BRM_status, S_IRUGO, _ctl_BRM_status_show, NULL);
2755
2756 struct DIAG_BUFFER_START {
2757         __le32 Size;
2758         __le32 DiagVersion;
2759         u8 BufferType;
2760         u8 Reserved[3];
2761         __le32 Reserved1;
2762         __le32 Reserved2;
2763         __le32 Reserved3;
2764 };
2765 /**
2766  * _ctl_host_trace_buffer_size_show - host buffer size (trace only)
2767  * @cdev - pointer to embedded class device
2768  * @buf - the buffer returned
2769  *
2770  * A sysfs 'read-only' shost attribute.
2771  */
2772 static ssize_t
2773 _ctl_host_trace_buffer_size_show(struct device *cdev,
2774     struct device_attribute *attr, char *buf)
2775 {
2776         struct Scsi_Host *shost = class_to_shost(cdev);
2777         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2778         u32 size = 0;
2779         struct DIAG_BUFFER_START *request_data;
2780
2781         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2782                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2783                     "registered\n", ioc->name, __func__);
2784                 return 0;
2785         }
2786
2787         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2788             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2789                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2790                     "registered\n", ioc->name, __func__);
2791                 return 0;
2792         }
2793
2794         request_data = (struct DIAG_BUFFER_START *)
2795             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
2796         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
2797             le32_to_cpu(request_data->DiagVersion) == 0x01000000) &&
2798             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
2799                 size = le32_to_cpu(request_data->Size);
2800
2801         ioc->ring_buffer_sz = size;
2802         return snprintf(buf, PAGE_SIZE, "%d\n", size);
2803 }
2804 static DEVICE_ATTR(host_trace_buffer_size, S_IRUGO,
2805          _ctl_host_trace_buffer_size_show, NULL);
2806
2807 /**
2808  * _ctl_host_trace_buffer_show - firmware ring buffer (trace only)
2809  * @cdev - pointer to embedded class device
2810  * @buf - the buffer returned
2811  *
2812  * A sysfs 'read/write' shost attribute.
2813  *
2814  * You will only be able to read 4k bytes of ring buffer at a time.
2815  * In order to read beyond 4k bytes, you will have to write out the
2816  * offset to the same attribute, it will move the pointer.
2817  */
2818 static ssize_t
2819 _ctl_host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
2820      char *buf)
2821 {
2822         struct Scsi_Host *shost = class_to_shost(cdev);
2823         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2824         void *request_data;
2825         u32 size;
2826
2827         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2828                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2829                     "registered\n", ioc->name, __func__);
2830                 return 0;
2831         }
2832
2833         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2834             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2835                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2836                     "registered\n", ioc->name, __func__);
2837                 return 0;
2838         }
2839
2840         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
2841                 return 0;
2842
2843         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
2844         size = (size > PAGE_SIZE) ? PAGE_SIZE : size;
2845         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
2846         memcpy(buf, request_data, size);
2847         return size;
2848 }
2849
2850 static ssize_t
2851 _ctl_host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
2852     const char *buf, size_t count)
2853 {
2854         struct Scsi_Host *shost = class_to_shost(cdev);
2855         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2856         int val = 0;
2857
2858         if (sscanf(buf, "%d", &val) != 1)
2859                 return -EINVAL;
2860
2861         ioc->ring_buffer_offset = val;
2862         return strlen(buf);
2863 }
2864 static DEVICE_ATTR(host_trace_buffer, S_IRUGO | S_IWUSR,
2865     _ctl_host_trace_buffer_show, _ctl_host_trace_buffer_store);
2866
2867 /*****************************************/
2868
2869 /**
2870  * _ctl_host_trace_buffer_enable_show - firmware ring buffer (trace only)
2871  * @cdev - pointer to embedded class device
2872  * @buf - the buffer returned
2873  *
2874  * A sysfs 'read/write' shost attribute.
2875  *
2876  * This is a mechnism to post/release host_trace_buffers
2877  */
2878 static ssize_t
2879 _ctl_host_trace_buffer_enable_show(struct device *cdev,
2880     struct device_attribute *attr, char *buf)
2881 {
2882         struct Scsi_Host *shost = class_to_shost(cdev);
2883         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2884
2885         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
2886            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2887             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0))
2888                 return snprintf(buf, PAGE_SIZE, "off\n");
2889         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2890             MPT2_DIAG_BUFFER_IS_RELEASED))
2891                 return snprintf(buf, PAGE_SIZE, "release\n");
2892         else
2893                 return snprintf(buf, PAGE_SIZE, "post\n");
2894 }
2895
2896 static ssize_t
2897 _ctl_host_trace_buffer_enable_store(struct device *cdev,
2898     struct device_attribute *attr, const char *buf, size_t count)
2899 {
2900         struct Scsi_Host *shost = class_to_shost(cdev);
2901         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2902         char str[10] = "";
2903         struct mpt2_diag_register diag_register;
2904         u8 issue_reset = 0;
2905
2906         if (sscanf(buf, "%9s", str) != 1)
2907                 return -EINVAL;
2908
2909         if (!strcmp(str, "post")) {
2910                 /* exit out if host buffers are already posted */
2911                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
2912                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2913                     MPT2_DIAG_BUFFER_IS_REGISTERED) &&
2914                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2915                     MPT2_DIAG_BUFFER_IS_RELEASED) == 0))
2916                         goto out;
2917                 memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
2918                 printk(MPT2SAS_INFO_FMT "posting host trace buffers\n",
2919                     ioc->name);
2920                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
2921                 diag_register.requested_buffer_size = (1024 * 1024);
2922                 diag_register.unique_id = 0x7075900;
2923                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
2924                 _ctl_diag_register_2(ioc,  &diag_register);
2925         } else if (!strcmp(str, "release")) {
2926                 /* exit out if host buffers are already released */
2927                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
2928                         goto out;
2929                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2930                     MPT2_DIAG_BUFFER_IS_REGISTERED) == 0)
2931                         goto out;
2932                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2933                     MPT2_DIAG_BUFFER_IS_RELEASED))
2934                         goto out;
2935                 printk(MPT2SAS_INFO_FMT "releasing host trace buffer\n",
2936                     ioc->name);
2937                 _ctl_send_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE, &issue_reset);
2938         }
2939
2940  out:
2941         return strlen(buf);
2942 }
2943 static DEVICE_ATTR(host_trace_buffer_enable, S_IRUGO | S_IWUSR,
2944     _ctl_host_trace_buffer_enable_show, _ctl_host_trace_buffer_enable_store);
2945
2946 struct device_attribute *mpt2sas_host_attrs[] = {
2947         &dev_attr_version_fw,
2948         &dev_attr_version_bios,
2949         &dev_attr_version_mpi,
2950         &dev_attr_version_product,
2951         &dev_attr_version_nvdata_persistent,
2952         &dev_attr_version_nvdata_default,
2953         &dev_attr_board_name,
2954         &dev_attr_board_assembly,
2955         &dev_attr_board_tracer,
2956         &dev_attr_io_delay,
2957         &dev_attr_device_delay,
2958         &dev_attr_logging_level,
2959         &dev_attr_fwfault_debug,
2960         &dev_attr_fw_queue_depth,
2961         &dev_attr_host_sas_address,
2962         &dev_attr_ioc_reset_count,
2963         &dev_attr_host_trace_buffer_size,
2964         &dev_attr_host_trace_buffer,
2965         &dev_attr_host_trace_buffer_enable,
2966         &dev_attr_reply_queue_count,
2967         &dev_attr_BRM_status,
2968         NULL,
2969 };
2970
2971 /**
2972  * _ctl_device_sas_address_show - sas address
2973  * @cdev - pointer to embedded class device
2974  * @buf - the buffer returned
2975  *
2976  * This is the sas address for the target
2977  *
2978  * A sysfs 'read-only' shost attribute.
2979  */
2980 static ssize_t
2981 _ctl_device_sas_address_show(struct device *dev, struct device_attribute *attr,
2982     char *buf)
2983 {
2984         struct scsi_device *sdev = to_scsi_device(dev);
2985         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
2986
2987         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2988             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
2989 }
2990 static DEVICE_ATTR(sas_address, S_IRUGO, _ctl_device_sas_address_show, NULL);
2991
2992 /**
2993  * _ctl_device_handle_show - device handle
2994  * @cdev - pointer to embedded class device
2995  * @buf - the buffer returned
2996  *
2997  * This is the firmware assigned device handle
2998  *
2999  * A sysfs 'read-only' shost attribute.
3000  */
3001 static ssize_t
3002 _ctl_device_handle_show(struct device *dev, struct device_attribute *attr,
3003     char *buf)
3004 {
3005         struct scsi_device *sdev = to_scsi_device(dev);
3006         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3007
3008         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
3009             sas_device_priv_data->sas_target->handle);
3010 }
3011 static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL);
3012
3013 struct device_attribute *mpt2sas_dev_attrs[] = {
3014         &dev_attr_sas_address,
3015         &dev_attr_sas_device_handle,
3016         NULL,
3017 };
3018
3019 static const struct file_operations ctl_fops = {
3020         .owner = THIS_MODULE,
3021         .unlocked_ioctl = _ctl_ioctl,
3022         .poll = _ctl_poll,
3023         .fasync = _ctl_fasync,
3024 #ifdef CONFIG_COMPAT
3025         .compat_ioctl = _ctl_ioctl_compat,
3026 #endif
3027         .llseek = noop_llseek,
3028 };
3029
3030 static struct miscdevice ctl_dev = {
3031         .minor  = MPT2SAS_MINOR,
3032         .name   = MPT2SAS_DEV_NAME,
3033         .fops   = &ctl_fops,
3034 };
3035
3036 /**
3037  * mpt2sas_ctl_init - main entry point for ctl.
3038  *
3039  */
3040 void
3041 mpt2sas_ctl_init(void)
3042 {
3043         async_queue = NULL;
3044         if (misc_register(&ctl_dev) < 0)
3045                 printk(KERN_ERR "%s can't register misc device [minor=%d]\n",
3046                     MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
3047
3048         init_waitqueue_head(&ctl_poll_wait);
3049 }
3050
3051 /**
3052  * mpt2sas_ctl_exit - exit point for ctl
3053  *
3054  */
3055 void
3056 mpt2sas_ctl_exit(void)
3057 {
3058         struct MPT2SAS_ADAPTER *ioc;
3059         int i;
3060
3061         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
3062
3063                 /* free memory associated to diag buffers */
3064                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
3065                         if (!ioc->diag_buffer[i])
3066                                 continue;
3067                         pci_free_consistent(ioc->pdev, ioc->diag_buffer_sz[i],
3068                             ioc->diag_buffer[i], ioc->diag_buffer_dma[i]);
3069                         ioc->diag_buffer[i] = NULL;
3070                         ioc->diag_buffer_status[i] = 0;
3071                 }
3072
3073                 kfree(ioc->event_log);
3074         }
3075         misc_deregister(&ctl_dev);
3076 }
3077