drivers/scsi/mpt3sas/mpt3sas_ctl.c

   1 /*
   2  * Management Module Support for MPT (Message Passing Technology) based
   3  * controllers
   4  *
   5  * This code is based on drivers/scsi/mpt3sas/mpt3sas_ctl.c
   6  * Copyright (C) 2012-2014  LSI Corporation
   7  * Copyright (C) 2013-2014 Avago Technologies
   8  *  (mailto: [email protected])
   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/compat.h>
  55 #include <linux/poll.h>
  56
  57 #include <linux/io.h>
  58 #include <linux/uaccess.h>
  59
  60 #include "mpt3sas_base.h"
  61 #include "mpt3sas_ctl.h"
  62
  63
  64 static struct fasync_struct *async_queue;
  65 static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
  66
  67
  68 /**
  69  * enum block_state - blocking state
  70  * @NON_BLOCKING: non blocking
  71  * @BLOCKING: blocking
  72  *
  73  * These states are for ioctls that need to wait for a response
  74  * from firmware, so they probably require sleep.
  75  */
  76 enum block_state {
  77         NON_BLOCKING,
  78         BLOCKING,
  79 };
  80
  81 /**
  82  * _ctl_display_some_debug - debug routine
  83  * @ioc: per adapter object
  84  * @smid: system request message index
  85  * @calling_function_name: string pass from calling function
  86  * @mpi_reply: reply message frame
  87  * Context: none.
  88  *
  89  * Function for displaying debug info helpful when debugging issues
  90  * in this module.
  91  */
  92 static void
  93 _ctl_display_some_debug(struct MPT3SAS_ADAPTER *ioc, u16 smid,
  94         char *calling_function_name, MPI2DefaultReply_t *mpi_reply)
  95 {
  96         Mpi2ConfigRequest_t *mpi_request;
  97         char *desc = NULL;
  98
  99         if (!(ioc->logging_level & MPT_DEBUG_IOCTL))
 100                 return;
 101
 102         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
 103         switch (mpi_request->Function) {
 104         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 105         {
 106                 Mpi2SCSIIORequest_t *scsi_request =
 107                     (Mpi2SCSIIORequest_t *)mpi_request;
 108
 109                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 110                     "scsi_io, cmd(0x%02x), cdb_len(%d)",
 111                     scsi_request->CDB.CDB32[0],
 112                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 113                 desc = ioc->tmp_string;
 114                 break;
 115         }
 116         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 117                 desc = "task_mgmt";
 118                 break;
 119         case MPI2_FUNCTION_IOC_INIT:
 120                 desc = "ioc_init";
 121                 break;
 122         case MPI2_FUNCTION_IOC_FACTS:
 123                 desc = "ioc_facts";
 124                 break;
 125         case MPI2_FUNCTION_CONFIG:
 126         {
 127                 Mpi2ConfigRequest_t *config_request =
 128                     (Mpi2ConfigRequest_t *)mpi_request;
 129
 130                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 131                     "config, type(0x%02x), ext_type(0x%02x), number(%d)",
 132                     (config_request->Header.PageType &
 133                      MPI2_CONFIG_PAGETYPE_MASK), config_request->ExtPageType,
 134                     config_request->Header.PageNumber);
 135                 desc = ioc->tmp_string;
 136                 break;
 137         }
 138         case MPI2_FUNCTION_PORT_FACTS:
 139                 desc = "port_facts";
 140                 break;
 141         case MPI2_FUNCTION_PORT_ENABLE:
 142                 desc = "port_enable";
 143                 break;
 144         case MPI2_FUNCTION_EVENT_NOTIFICATION:
 145                 desc = "event_notification";
 146                 break;
 147         case MPI2_FUNCTION_FW_DOWNLOAD:
 148                 desc = "fw_download";
 149                 break;
 150         case MPI2_FUNCTION_FW_UPLOAD:
 151                 desc = "fw_upload";
 152                 break;
 153         case MPI2_FUNCTION_RAID_ACTION:
 154                 desc = "raid_action";
 155                 break;
 156         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 157         {
 158                 Mpi2SCSIIORequest_t *scsi_request =
 159                     (Mpi2SCSIIORequest_t *)mpi_request;
 160
 161                 snprintf(ioc->tmp_string, MPT_STRING_LENGTH,
 162                     "raid_pass, cmd(0x%02x), cdb_len(%d)",
 163                     scsi_request->CDB.CDB32[0],
 164                     le16_to_cpu(scsi_request->IoFlags) & 0xF);
 165                 desc = ioc->tmp_string;
 166                 break;
 167         }
 168         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 169                 desc = "sas_iounit_cntl";
 170                 break;
 171         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 172                 desc = "sata_pass";
 173                 break;
 174         case MPI2_FUNCTION_DIAG_BUFFER_POST:
 175                 desc = "diag_buffer_post";
 176                 break;
 177         case MPI2_FUNCTION_DIAG_RELEASE:
 178                 desc = "diag_release";
 179                 break;
 180         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 181                 desc = "smp_passthrough";
 182                 break;
 183         }
 184
 185         if (!desc)
 186                 return;
 187
 188         pr_info(MPT3SAS_FMT "%s: %s, smid(%d)\n",
 189             ioc->name, calling_function_name, desc, smid);
 190
 191         if (!mpi_reply)
 192                 return;
 193
 194         if (mpi_reply->IOCStatus || mpi_reply->IOCLogInfo)
 195                 pr_info(MPT3SAS_FMT
 196                     "\tiocstatus(0x%04x), loginfo(0x%08x)\n",
 197                     ioc->name, le16_to_cpu(mpi_reply->IOCStatus),
 198                     le32_to_cpu(mpi_reply->IOCLogInfo));
 199
 200         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 201             mpi_request->Function ==
 202             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 203                 Mpi2SCSIIOReply_t *scsi_reply =
 204                     (Mpi2SCSIIOReply_t *)mpi_reply;
 205                 struct _sas_device *sas_device = NULL;
 206                 struct _pcie_device *pcie_device = NULL;
 207
 208                 sas_device = mpt3sas_get_sdev_by_handle(ioc,
 209                     le16_to_cpu(scsi_reply->DevHandle));
 210                 if (sas_device) {
 211                         pr_warn(MPT3SAS_FMT "\tsas_address(0x%016llx), phy(%d)\n",
 212                                 ioc->name, (unsigned long long)
 213                             sas_device->sas_address, sas_device->phy);
 214                         pr_warn(MPT3SAS_FMT
 215                             "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 216                             ioc->name, (unsigned long long)
 217                             sas_device->enclosure_logical_id, sas_device->slot);
 218                         sas_device_put(sas_device);
 219                 }
 220                 if (!sas_device) {
 221                         pcie_device = mpt3sas_get_pdev_by_handle(ioc,
 222                                 le16_to_cpu(scsi_reply->DevHandle));
 223                         if (pcie_device) {
 224                                 pr_warn(MPT3SAS_FMT
 225                                     "\tWWID(0x%016llx), port(%d)\n", ioc->name,
 226                                     (unsigned long long)pcie_device->wwid,
 227                                     pcie_device->port_num);
 228                                 if (pcie_device->enclosure_handle != 0)
 229                                         pr_warn(MPT3SAS_FMT
 230                                             "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 231                                             ioc->name, (unsigned long long)
 232                                             pcie_device->enclosure_logical_id,
 233                                             pcie_device->slot);
 234                                 pcie_device_put(pcie_device);
 235                         }
 236                 }
 237                 if (scsi_reply->SCSIState || scsi_reply->SCSIStatus)
 238                         pr_info(MPT3SAS_FMT
 239                             "\tscsi_state(0x%02x), scsi_status"
 240                             "(0x%02x)\n", ioc->name,
 241                             scsi_reply->SCSIState,
 242                             scsi_reply->SCSIStatus);
 243         }
 244 }
 245
 246 /**
 247  * mpt3sas_ctl_done - ctl module completion routine
 248  * @ioc: per adapter object
 249  * @smid: system request message index
 250  * @msix_index: MSIX table index supplied by the OS
 251  * @reply: reply message frame(lower 32bit addr)
 252  * Context: none.
 253  *
 254  * The callback handler when using ioc->ctl_cb_idx.
 255  *
 256  * Return 1 meaning mf should be freed from _base_interrupt
 257  *        0 means the mf is freed from this function.
 258  */
 259 u8
 260 mpt3sas_ctl_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 261         u32 reply)
 262 {
 263         MPI2DefaultReply_t *mpi_reply;
 264         Mpi2SCSIIOReply_t *scsiio_reply;
 265         Mpi26NVMeEncapsulatedErrorReply_t *nvme_error_reply;
 266         const void *sense_data;
 267         u32 sz;
 268
 269         if (ioc->ctl_cmds.status == MPT3_CMD_NOT_USED)
 270                 return 1;
 271         if (ioc->ctl_cmds.smid != smid)
 272                 return 1;
 273         ioc->ctl_cmds.status |= MPT3_CMD_COMPLETE;
 274         mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
 275         if (mpi_reply) {
 276                 memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 277                 ioc->ctl_cmds.status |= MPT3_CMD_REPLY_VALID;
 278                 /* get sense data */
 279                 if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 280                     mpi_reply->Function ==
 281                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 282                         scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply;
 283                         if (scsiio_reply->SCSIState &
 284                             MPI2_SCSI_STATE_AUTOSENSE_VALID) {
 285                                 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
 286                                     le32_to_cpu(scsiio_reply->SenseCount));
 287                                 sense_data = mpt3sas_base_get_sense_buffer(ioc,
 288                                     smid);
 289                                 memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 290                         }
 291                 }
 292                 /*
 293                  * Get Error Response data for NVMe device. The ctl_cmds.sense
 294                  * buffer is used to store the Error Response data.
 295                  */
 296                 if (mpi_reply->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
 297                         nvme_error_reply =
 298                             (Mpi26NVMeEncapsulatedErrorReply_t *)mpi_reply;
 299                         sz = min_t(u32, NVME_ERROR_RESPONSE_SIZE,
 300                             le16_to_cpu(nvme_error_reply->ErrorResponseCount));
 301                         sense_data = mpt3sas_base_get_sense_buffer(ioc, smid);
 302                         memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 303                 }
 304         }
 305
 306         _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply);
 307         ioc->ctl_cmds.status &= ~MPT3_CMD_PENDING;
 308         complete(&ioc->ctl_cmds.done);
 309         return 1;
 310 }
 311
 312 /**
 313  * _ctl_check_event_type - determines when an event needs logging
 314  * @ioc: per adapter object
 315  * @event: firmware event
 316  *
 317  * The bitmask in ioc->event_type[] indicates which events should be
 318  * be saved in the driver event_log.  This bitmask is set by application.
 319  *
 320  * Returns 1 when event should be captured, or zero means no match.
 321  */
 322 static int
 323 _ctl_check_event_type(struct MPT3SAS_ADAPTER *ioc, u16 event)
 324 {
 325         u16 i;
 326         u32 desired_event;
 327
 328         if (event >= 128 || !event || !ioc->event_log)
 329                 return 0;
 330
 331         desired_event = (1 << (event % 32));
 332         if (!desired_event)
 333                 desired_event = 1;
 334         i = event / 32;
 335         return desired_event & ioc->event_type[i];
 336 }
 337
 338 /**
 339  * mpt3sas_ctl_add_to_event_log - add event
 340  * @ioc: per adapter object
 341  * @mpi_reply: reply message frame
 342  *
 343  * Return nothing.
 344  */
 345 void
 346 mpt3sas_ctl_add_to_event_log(struct MPT3SAS_ADAPTER *ioc,
 347         Mpi2EventNotificationReply_t *mpi_reply)
 348 {
 349         struct MPT3_IOCTL_EVENTS *event_log;
 350         u16 event;
 351         int i;
 352         u32 sz, event_data_sz;
 353         u8 send_aen = 0;
 354
 355         if (!ioc->event_log)
 356                 return;
 357
 358         event = le16_to_cpu(mpi_reply->Event);
 359
 360         if (_ctl_check_event_type(ioc, event)) {
 361
 362                 /* insert entry into circular event_log */
 363                 i = ioc->event_context % MPT3SAS_CTL_EVENT_LOG_SIZE;
 364                 event_log = ioc->event_log;
 365                 event_log[i].event = event;
 366                 event_log[i].context = ioc->event_context++;
 367
 368                 event_data_sz = le16_to_cpu(mpi_reply->EventDataLength)*4;
 369                 sz = min_t(u32, event_data_sz, MPT3_EVENT_DATA_SIZE);
 370                 memset(event_log[i].data, 0, MPT3_EVENT_DATA_SIZE);
 371                 memcpy(event_log[i].data, mpi_reply->EventData, sz);
 372                 send_aen = 1;
 373         }
 374
 375         /* This aen_event_read_flag flag is set until the
 376          * application has read the event log.
 377          * For MPI2_EVENT_LOG_ENTRY_ADDED, we always notify.
 378          */
 379         if (event == MPI2_EVENT_LOG_ENTRY_ADDED ||
 380             (send_aen && !ioc->aen_event_read_flag)) {
 381                 ioc->aen_event_read_flag = 1;
 382                 wake_up_interruptible(&ctl_poll_wait);
 383                 if (async_queue)
 384                         kill_fasync(&async_queue, SIGIO, POLL_IN);
 385         }
 386 }
 387
 388 /**
 389  * mpt3sas_ctl_event_callback - firmware event handler (called at ISR time)
 390  * @ioc: per adapter object
 391  * @msix_index: MSIX table index supplied by the OS
 392  * @reply: reply message frame(lower 32bit addr)
 393  * Context: interrupt.
 394  *
 395  * This function merely adds a new work task into ioc->firmware_event_thread.
 396  * The tasks are worked from _firmware_event_work in user context.
 397  *
 398  * Return 1 meaning mf should be freed from _base_interrupt
 399  *        0 means the mf is freed from this function.
 400  */
 401 u8
 402 mpt3sas_ctl_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
 403         u32 reply)
 404 {
 405         Mpi2EventNotificationReply_t *mpi_reply;
 406
 407         mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
 408         if (mpi_reply)
 409                 mpt3sas_ctl_add_to_event_log(ioc, mpi_reply);
 410         return 1;
 411 }
 412
 413 /**
 414  * _ctl_verify_adapter - validates ioc_number passed from application
 415  * @ioc: per adapter object
 416  * @iocpp: The ioc pointer is returned in this.
 417  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
 418  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
 419  *
 420  * Return (-1) means error, else ioc_number.
 421  */
 422 static int
 423 _ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp,
 424                                                         int mpi_version)
 425 {
 426         struct MPT3SAS_ADAPTER *ioc;
 427         int version = 0;
 428         /* global ioc lock to protect controller on list operations */
 429         spin_lock(&gioc_lock);
 430         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 431                 if (ioc->id != ioc_number)
 432                         continue;
 433                 /* Check whether this ioctl command is from right
 434                  * ioctl device or not, if not continue the search.
 435                  */
 436                 version = ioc->hba_mpi_version_belonged;
 437                 /* MPI25_VERSION and MPI26_VERSION uses same ioctl
 438                  * device.
 439                  */
 440                 if (mpi_version == (MPI25_VERSION | MPI26_VERSION)) {
 441                         if ((version == MPI25_VERSION) ||
 442                                 (version == MPI26_VERSION))
 443                                 goto out;
 444                         else
 445                                 continue;
 446                 } else {
 447                         if (version != mpi_version)
 448                                 continue;
 449                 }
 450 out:
 451                 spin_unlock(&gioc_lock);
 452                 *iocpp = ioc;
 453                 return ioc_number;
 454         }
 455         spin_unlock(&gioc_lock);
 456         *iocpp = NULL;
 457         return -1;
 458 }
 459
 460 /**
 461  * mpt3sas_ctl_reset_handler - reset callback handler (for ctl)
 462  * @ioc: per adapter object
 463  * @reset_phase: phase
 464  *
 465  * The handler for doing any required cleanup or initialization.
 466  *
 467  * The reset phase can be MPT3_IOC_PRE_RESET, MPT3_IOC_AFTER_RESET,
 468  * MPT3_IOC_DONE_RESET
 469  */
 470 void
 471 mpt3sas_ctl_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase)
 472 {
 473         int i;
 474         u8 issue_reset;
 475
 476         switch (reset_phase) {
 477         case MPT3_IOC_PRE_RESET:
 478                 dtmprintk(ioc, pr_info(MPT3SAS_FMT
 479                         "%s: MPT3_IOC_PRE_RESET\n", ioc->name, __func__));
 480                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 481                         if (!(ioc->diag_buffer_status[i] &
 482                             MPT3_DIAG_BUFFER_IS_REGISTERED))
 483                                 continue;
 484                         if ((ioc->diag_buffer_status[i] &
 485                             MPT3_DIAG_BUFFER_IS_RELEASED))
 486                                 continue;
 487                         mpt3sas_send_diag_release(ioc, i, &issue_reset);
 488                 }
 489                 break;
 490         case MPT3_IOC_AFTER_RESET:
 491                 dtmprintk(ioc, pr_info(MPT3SAS_FMT
 492                         "%s: MPT3_IOC_AFTER_RESET\n", ioc->name, __func__));
 493                 if (ioc->ctl_cmds.status & MPT3_CMD_PENDING) {
 494                         ioc->ctl_cmds.status |= MPT3_CMD_RESET;
 495                         mpt3sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
 496                         complete(&ioc->ctl_cmds.done);
 497                 }
 498                 break;
 499         case MPT3_IOC_DONE_RESET:
 500                 dtmprintk(ioc, pr_info(MPT3SAS_FMT
 501                         "%s: MPT3_IOC_DONE_RESET\n", ioc->name, __func__));
 502
 503                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 504                         if (!(ioc->diag_buffer_status[i] &
 505                             MPT3_DIAG_BUFFER_IS_REGISTERED))
 506                                 continue;
 507                         if ((ioc->diag_buffer_status[i] &
 508                             MPT3_DIAG_BUFFER_IS_RELEASED))
 509                                 continue;
 510                         ioc->diag_buffer_status[i] |=
 511                             MPT3_DIAG_BUFFER_IS_DIAG_RESET;
 512                 }
 513                 break;
 514         }
 515 }
 516
 517 /**
 518  * _ctl_fasync -
 519  * @fd -
 520  * @filep -
 521  * @mode -
 522  *
 523  * Called when application request fasyn callback handler.
 524  */
 525 static int
 526 _ctl_fasync(int fd, struct file *filep, int mode)
 527 {
 528         return fasync_helper(fd, filep, mode, &async_queue);
 529 }
 530
 531 /**
 532  * _ctl_poll -
 533  * @file -
 534  * @wait -
 535  *
 536  */
 537 static __poll_t
 538 _ctl_poll(struct file *filep, poll_table *wait)
 539 {
 540         struct MPT3SAS_ADAPTER *ioc;
 541
 542         poll_wait(filep, &ctl_poll_wait, wait);
 543
 544         /* global ioc lock to protect controller on list operations */
 545         spin_lock(&gioc_lock);
 546         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 547                 if (ioc->aen_event_read_flag) {
 548                         spin_unlock(&gioc_lock);
 549                         return EPOLLIN | EPOLLRDNORM;
 550                 }
 551         }
 552         spin_unlock(&gioc_lock);
 553         return 0;
 554 }
 555
 556 /**
 557  * _ctl_set_task_mid - assign an active smid to tm request
 558  * @ioc: per adapter object
 559  * @karg - (struct mpt3_ioctl_command)
 560  * @tm_request - pointer to mf from user space
 561  *
 562  * Returns 0 when an smid if found, else fail.
 563  * during failure, the reply frame is filled.
 564  */
 565 static int
 566 _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
 567         Mpi2SCSITaskManagementRequest_t *tm_request)
 568 {
 569         u8 found = 0;
 570         u16 smid;
 571         u16 handle;
 572         struct scsi_cmnd *scmd;
 573         struct MPT3SAS_DEVICE *priv_data;
 574         Mpi2SCSITaskManagementReply_t *tm_reply;
 575         u32 sz;
 576         u32 lun;
 577         char *desc = NULL;
 578
 579         if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
 580                 desc = "abort_task";
 581         else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
 582                 desc = "query_task";
 583         else
 584                 return 0;
 585
 586         lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
 587
 588         handle = le16_to_cpu(tm_request->DevHandle);
 589         for (smid = ioc->scsiio_depth; smid && !found; smid--) {
 590                 struct scsiio_tracker *st;
 591
 592                 scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
 593                 if (!scmd)
 594                         continue;
 595                 if (lun != scmd->device->lun)
 596                         continue;
 597                 priv_data = scmd->device->hostdata;
 598                 if (priv_data->sas_target == NULL)
 599                         continue;
 600                 if (priv_data->sas_target->handle != handle)
 601                         continue;
 602                 st = scsi_cmd_priv(scmd);
 603                 tm_request->TaskMID = cpu_to_le16(st->smid);
 604                 found = 1;
 605         }
 606
 607         if (!found) {
 608                 dctlprintk(ioc, pr_info(MPT3SAS_FMT
 609                         "%s: handle(0x%04x), lun(%d), no active mid!!\n",
 610                         ioc->name,
 611                     desc, le16_to_cpu(tm_request->DevHandle), lun));
 612                 tm_reply = ioc->ctl_cmds.reply;
 613                 tm_reply->DevHandle = tm_request->DevHandle;
 614                 tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 615                 tm_reply->TaskType = tm_request->TaskType;
 616                 tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
 617                 tm_reply->VP_ID = tm_request->VP_ID;
 618                 tm_reply->VF_ID = tm_request->VF_ID;
 619                 sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
 620                 if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 621                     sz))
 622                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 623                             __LINE__, __func__);
 624                 return 1;
 625         }
 626
 627         dctlprintk(ioc, pr_info(MPT3SAS_FMT
 628                 "%s: handle(0x%04x), lun(%d), task_mid(%d)\n", ioc->name,
 629             desc, le16_to_cpu(tm_request->DevHandle), lun,
 630              le16_to_cpu(tm_request->TaskMID)));
 631         return 0;
 632 }
 633
 634 /**
 635  * _ctl_do_mpt_command - main handler for MPT3COMMAND opcode
 636  * @ioc: per adapter object
 637  * @karg - (struct mpt3_ioctl_command)
 638  * @mf - pointer to mf in user space
 639  */
 640 static long
 641 _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
 642         void __user *mf)
 643 {
 644         MPI2RequestHeader_t *mpi_request = NULL, *request;
 645         MPI2DefaultReply_t *mpi_reply;
 646         Mpi26NVMeEncapsulatedRequest_t *nvme_encap_request = NULL;
 647         struct _pcie_device *pcie_device = NULL;
 648         u32 ioc_state;
 649         u16 smid;
 650         u8 timeout;
 651         u8 issue_reset;
 652         u32 sz, sz_arg;
 653         void *psge;
 654         void *data_out = NULL;
 655         dma_addr_t data_out_dma = 0;
 656         size_t data_out_sz = 0;
 657         void *data_in = NULL;
 658         dma_addr_t data_in_dma = 0;
 659         size_t data_in_sz = 0;
 660         long ret;
 661         u16 wait_state_count;
 662         u16 device_handle = MPT3SAS_INVALID_DEVICE_HANDLE;
 663         u8 tr_method = MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE;
 664
 665         issue_reset = 0;
 666
 667         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
 668                 pr_err(MPT3SAS_FMT "%s: ctl_cmd in use\n",
 669                     ioc->name, __func__);
 670                 ret = -EAGAIN;
 671                 goto out;
 672         }
 673
 674         wait_state_count = 0;
 675         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
 676         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 677                 if (wait_state_count++ == 10) {
 678                         pr_err(MPT3SAS_FMT
 679                             "%s: failed due to ioc not operational\n",
 680                             ioc->name, __func__);
 681                         ret = -EFAULT;
 682                         goto out;
 683                 }
 684                 ssleep(1);
 685                 ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
 686                 pr_info(MPT3SAS_FMT
 687                         "%s: waiting for operational state(count=%d)\n",
 688                         ioc->name,
 689                     __func__, wait_state_count);
 690         }
 691         if (wait_state_count)
 692                 pr_info(MPT3SAS_FMT "%s: ioc is operational\n",
 693                     ioc->name, __func__);
 694
 695         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 696         if (!mpi_request) {
 697                 pr_err(MPT3SAS_FMT
 698                         "%s: failed obtaining a memory for mpi_request\n",
 699                         ioc->name, __func__);
 700                 ret = -ENOMEM;
 701                 goto out;
 702         }
 703
 704         /* Check for overflow and wraparound */
 705         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 706             karg.data_sge_offset > (UINT_MAX / 4)) {
 707                 ret = -EINVAL;
 708                 goto out;
 709         }
 710
 711         /* copy in request message frame from user */
 712         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 713                 pr_err("failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 714                     __func__);
 715                 ret = -EFAULT;
 716                 goto out;
 717         }
 718
 719         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 720                 smid = mpt3sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 721                 if (!smid) {
 722                         pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
 723                             ioc->name, __func__);
 724                         ret = -EAGAIN;
 725                         goto out;
 726                 }
 727         } else {
 728                 /* Use first reserved smid for passthrough ioctls */
 729                 smid = ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT + 1;
 730         }
 731
 732         ret = 0;
 733         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
 734         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 735         request = mpt3sas_base_get_msg_frame(ioc, smid);
 736         memcpy(request, mpi_request, karg.data_sge_offset*4);
 737         ioc->ctl_cmds.smid = smid;
 738         data_out_sz = karg.data_out_size;
 739         data_in_sz = karg.data_in_size;
 740
 741         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 742             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 743             mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT ||
 744             mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH ||
 745             mpi_request->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
 746
 747                 device_handle = le16_to_cpu(mpi_request->FunctionDependent1);
 748                 if (!device_handle || (device_handle >
 749                     ioc->facts.MaxDevHandle)) {
 750                         ret = -EINVAL;
 751                         mpt3sas_base_free_smid(ioc, smid);
 752                         goto out;
 753                 }
 754         }
 755
 756         /* obtain dma-able memory for data transfer */
 757         if (data_out_sz) /* WRITE */ {
 758                 data_out = pci_alloc_consistent(ioc->pdev, data_out_sz,
 759                     &data_out_dma);
 760                 if (!data_out) {
 761                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 762                             __LINE__, __func__);
 763                         ret = -ENOMEM;
 764                         mpt3sas_base_free_smid(ioc, smid);
 765                         goto out;
 766                 }
 767                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 768                         data_out_sz)) {
 769                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 770                             __LINE__, __func__);
 771                         ret =  -EFAULT;
 772                         mpt3sas_base_free_smid(ioc, smid);
 773                         goto out;
 774                 }
 775         }
 776
 777         if (data_in_sz) /* READ */ {
 778                 data_in = pci_alloc_consistent(ioc->pdev, data_in_sz,
 779                     &data_in_dma);
 780                 if (!data_in) {
 781                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 782                             __LINE__, __func__);
 783                         ret = -ENOMEM;
 784                         mpt3sas_base_free_smid(ioc, smid);
 785                         goto out;
 786                 }
 787         }
 788
 789         psge = (void *)request + (karg.data_sge_offset*4);
 790
 791         /* send command to firmware */
 792         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 793
 794         init_completion(&ioc->ctl_cmds.done);
 795         switch (mpi_request->Function) {
 796         case MPI2_FUNCTION_NVME_ENCAPSULATED:
 797         {
 798                 nvme_encap_request = (Mpi26NVMeEncapsulatedRequest_t *)request;
 799                 /*
 800                  * Get the Physical Address of the sense buffer.
 801                  * Use Error Response buffer address field to hold the sense
 802                  * buffer address.
 803                  * Clear the internal sense buffer, which will potentially hold
 804                  * the Completion Queue Entry on return, or 0 if no Entry.
 805                  * Build the PRPs and set direction bits.
 806                  * Send the request.
 807                  */
 808                 nvme_encap_request->ErrorResponseBaseAddress =
 809                     cpu_to_le64(ioc->sense_dma & 0xFFFFFFFF00000000UL);
 810                 nvme_encap_request->ErrorResponseBaseAddress |=
 811                    cpu_to_le64(le32_to_cpu(
 812                    mpt3sas_base_get_sense_buffer_dma(ioc, smid)));
 813                 nvme_encap_request->ErrorResponseAllocationLength =
 814                                         cpu_to_le16(NVME_ERROR_RESPONSE_SIZE);
 815                 memset(ioc->ctl_cmds.sense, 0, NVME_ERROR_RESPONSE_SIZE);
 816                 ioc->build_nvme_prp(ioc, smid, nvme_encap_request,
 817                     data_out_dma, data_out_sz, data_in_dma, data_in_sz);
 818                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 819                         dtmprintk(ioc, pr_info(MPT3SAS_FMT "handle(0x%04x) :"
 820                             "ioctl failed due to device removal in progress\n",
 821                             ioc->name, device_handle));
 822                         mpt3sas_base_free_smid(ioc, smid);
 823                         ret = -EINVAL;
 824                         goto out;
 825                 }
 826                 mpt3sas_base_put_smid_nvme_encap(ioc, smid);
 827                 break;
 828         }
 829         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 830         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 831         {
 832                 Mpi2SCSIIORequest_t *scsiio_request =
 833                     (Mpi2SCSIIORequest_t *)request;
 834                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 835                 scsiio_request->SenseBufferLowAddress =
 836                     mpt3sas_base_get_sense_buffer_dma(ioc, smid);
 837                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 838                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 839                         dtmprintk(ioc, pr_info(MPT3SAS_FMT
 840                                 "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 841                                 ioc->name, device_handle));
 842                         mpt3sas_base_free_smid(ioc, smid);
 843                         ret = -EINVAL;
 844                         goto out;
 845                 }
 846                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 847                     data_in_dma, data_in_sz);
 848                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 849                         ioc->put_smid_scsi_io(ioc, smid, device_handle);
 850                 else
 851                         mpt3sas_base_put_smid_default(ioc, smid);
 852                 break;
 853         }
 854         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 855         {
 856                 Mpi2SCSITaskManagementRequest_t *tm_request =
 857                     (Mpi2SCSITaskManagementRequest_t *)request;
 858
 859                 dtmprintk(ioc, pr_info(MPT3SAS_FMT
 860                         "TASK_MGMT: handle(0x%04x), task_type(0x%02x)\n",
 861                         ioc->name,
 862                     le16_to_cpu(tm_request->DevHandle), tm_request->TaskType));
 863                 ioc->got_task_abort_from_ioctl = 1;
 864                 if (tm_request->TaskType ==
 865                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 866                     tm_request->TaskType ==
 867                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 868                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 869                                 mpt3sas_base_free_smid(ioc, smid);
 870                                 ioc->got_task_abort_from_ioctl = 0;
 871                                 goto out;
 872                         }
 873                 }
 874                 ioc->got_task_abort_from_ioctl = 0;
 875
 876                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 877                         dtmprintk(ioc, pr_info(MPT3SAS_FMT
 878                                 "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 879                                 ioc->name, device_handle));
 880                         mpt3sas_base_free_smid(ioc, smid);
 881                         ret = -EINVAL;
 882                         goto out;
 883                 }
 884                 mpt3sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 885                     tm_request->DevHandle));
 886                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 887                     data_in_dma, data_in_sz);
 888                 mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
 889                 break;
 890         }
 891         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 892         {
 893                 Mpi2SmpPassthroughRequest_t *smp_request =
 894                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 895                 u8 *data;
 896
 897                 /* ioc determines which port to use */
 898                 smp_request->PhysicalPort = 0xFF;
 899                 if (smp_request->PassthroughFlags &
 900                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 901                         data = (u8 *)&smp_request->SGL;
 902                 else {
 903                         if (unlikely(data_out == NULL)) {
 904                                 pr_err("failure at %s:%d/%s()!\n",
 905                                     __FILE__, __LINE__, __func__);
 906                                 mpt3sas_base_free_smid(ioc, smid);
 907                                 ret = -EINVAL;
 908                                 goto out;
 909                         }
 910                         data = data_out;
 911                 }
 912
 913                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 914                         ioc->ioc_link_reset_in_progress = 1;
 915                         ioc->ignore_loginfos = 1;
 916                 }
 917                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 918                     data_in_sz);
 919                 mpt3sas_base_put_smid_default(ioc, smid);
 920                 break;
 921         }
 922         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 923         {
 924                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 925                         dtmprintk(ioc, pr_info(MPT3SAS_FMT
 926                                 "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 927                                 ioc->name, device_handle));
 928                         mpt3sas_base_free_smid(ioc, smid);
 929                         ret = -EINVAL;
 930                         goto out;
 931                 }
 932                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 933                     data_in_sz);
 934                 mpt3sas_base_put_smid_default(ioc, smid);
 935                 break;
 936         }
 937         case MPI2_FUNCTION_FW_DOWNLOAD:
 938         case MPI2_FUNCTION_FW_UPLOAD:
 939         {
 940                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 941                     data_in_sz);
 942                 mpt3sas_base_put_smid_default(ioc, smid);
 943                 break;
 944         }
 945         case MPI2_FUNCTION_TOOLBOX:
 946         {
 947                 Mpi2ToolboxCleanRequest_t *toolbox_request =
 948                         (Mpi2ToolboxCleanRequest_t *)mpi_request;
 949
 950                 if (toolbox_request->Tool == MPI2_TOOLBOX_DIAGNOSTIC_CLI_TOOL) {
 951                         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 952                                 data_in_dma, data_in_sz);
 953                 } else {
 954                         ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 955                                 data_in_dma, data_in_sz);
 956                 }
 957                 mpt3sas_base_put_smid_default(ioc, smid);
 958                 break;
 959         }
 960         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 961         {
 962                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
 963                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
 964
 965                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
 966                     || sasiounit_request->Operation ==
 967                     MPI2_SAS_OP_PHY_LINK_RESET) {
 968                         ioc->ioc_link_reset_in_progress = 1;
 969                         ioc->ignore_loginfos = 1;
 970                 }
 971                 /* drop to default case for posting the request */
 972         }
 973         default:
 974                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 975                     data_in_dma, data_in_sz);
 976                 mpt3sas_base_put_smid_default(ioc, smid);
 977                 break;
 978         }
 979
 980         if (karg.timeout < MPT3_IOCTL_DEFAULT_TIMEOUT)
 981                 timeout = MPT3_IOCTL_DEFAULT_TIMEOUT;
 982         else
 983                 timeout = karg.timeout;
 984         wait_for_completion_timeout(&ioc->ctl_cmds.done, timeout*HZ);
 985         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 986                 Mpi2SCSITaskManagementRequest_t *tm_request =
 987                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
 988                 mpt3sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
 989                     tm_request->DevHandle));
 990                 mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
 991         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
 992             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
 993                 ioc->ioc_link_reset_in_progress) {
 994                 ioc->ioc_link_reset_in_progress = 0;
 995                 ioc->ignore_loginfos = 0;
 996         }
 997         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
 998                 pr_err(MPT3SAS_FMT "%s: timeout\n", ioc->name,
 999                     __func__);
1000                 _debug_dump_mf(mpi_request, karg.data_sge_offset);
1001                 if (!(ioc->ctl_cmds.status & MPT3_CMD_RESET))
1002                         issue_reset = 1;
1003                 goto issue_host_reset;
1004         }
1005
1006         mpi_reply = ioc->ctl_cmds.reply;
1007
1008         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
1009             (ioc->logging_level & MPT_DEBUG_TM)) {
1010                 Mpi2SCSITaskManagementReply_t *tm_reply =
1011                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
1012
1013                 pr_info(MPT3SAS_FMT "TASK_MGMT: " \
1014                     "IOCStatus(0x%04x), IOCLogInfo(0x%08x), "
1015                     "TerminationCount(0x%08x)\n", ioc->name,
1016                     le16_to_cpu(tm_reply->IOCStatus),
1017                     le32_to_cpu(tm_reply->IOCLogInfo),
1018                     le32_to_cpu(tm_reply->TerminationCount));
1019         }
1020
1021         /* copy out xdata to user */
1022         if (data_in_sz) {
1023                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
1024                     data_in_sz)) {
1025                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1026                             __LINE__, __func__);
1027                         ret = -ENODATA;
1028                         goto out;
1029                 }
1030         }
1031
1032         /* copy out reply message frame to user */
1033         if (karg.max_reply_bytes) {
1034                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
1035                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
1036                     sz)) {
1037                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1038                             __LINE__, __func__);
1039                         ret = -ENODATA;
1040                         goto out;
1041                 }
1042         }
1043
1044         /* copy out sense/NVMe Error Response to user */
1045         if (karg.max_sense_bytes && (mpi_request->Function ==
1046             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
1047             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH || mpi_request->Function ==
1048             MPI2_FUNCTION_NVME_ENCAPSULATED)) {
1049                 if (karg.sense_data_ptr == NULL) {
1050                         pr_info(MPT3SAS_FMT "Response buffer provided"
1051                             " by application is NULL; Response data will"
1052                             " not be returned.\n", ioc->name);
1053                         goto out;
1054                 }
1055                 sz_arg = (mpi_request->Function ==
1056                 MPI2_FUNCTION_NVME_ENCAPSULATED) ? NVME_ERROR_RESPONSE_SIZE :
1057                                                         SCSI_SENSE_BUFFERSIZE;
1058                 sz = min_t(u32, karg.max_sense_bytes, sz_arg);
1059                 if (copy_to_user(karg.sense_data_ptr, ioc->ctl_cmds.sense,
1060                     sz)) {
1061                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1062                                 __LINE__, __func__);
1063                         ret = -ENODATA;
1064                         goto out;
1065                 }
1066         }
1067
1068  issue_host_reset:
1069         if (issue_reset) {
1070                 ret = -ENODATA;
1071                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
1072                     mpi_request->Function ==
1073                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
1074                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
1075                         pr_info(MPT3SAS_FMT "issue target reset: handle = (0x%04x)\n",
1076                                 ioc->name,
1077                                 le16_to_cpu(mpi_request->FunctionDependent1));
1078                         mpt3sas_halt_firmware(ioc);
1079                         pcie_device = mpt3sas_get_pdev_by_handle(ioc,
1080                                 le16_to_cpu(mpi_request->FunctionDependent1));
1081                         if (pcie_device && (!ioc->tm_custom_handling))
1082                                 mpt3sas_scsih_issue_locked_tm(ioc,
1083                                   le16_to_cpu(mpi_request->FunctionDependent1),
1084                                   0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1085                                   0, pcie_device->reset_timeout,
1086                                   tr_method);
1087                         else
1088                                 mpt3sas_scsih_issue_locked_tm(ioc,
1089                                   le16_to_cpu(mpi_request->FunctionDependent1),
1090                                   0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1091                                   0, 30, MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET);
1092                 } else
1093                         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1094         }
1095
1096  out:
1097         if (pcie_device)
1098                 pcie_device_put(pcie_device);
1099
1100         /* free memory associated with sg buffers */
1101         if (data_in)
1102                 pci_free_consistent(ioc->pdev, data_in_sz, data_in,
1103                     data_in_dma);
1104
1105         if (data_out)
1106                 pci_free_consistent(ioc->pdev, data_out_sz, data_out,
1107                     data_out_dma);
1108
1109         kfree(mpi_request);
1110         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1111         return ret;
1112 }
1113
1114 /**
1115  * _ctl_getiocinfo - main handler for MPT3IOCINFO opcode
1116  * @ioc: per adapter object
1117  * @arg - user space buffer containing ioctl content
1118  */
1119 static long
1120 _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1121 {
1122         struct mpt3_ioctl_iocinfo karg;
1123
1124         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
1125             __func__));
1126
1127         memset(&karg, 0 , sizeof(karg));
1128         if (ioc->pfacts)
1129                 karg.port_number = ioc->pfacts[0].PortNumber;
1130         karg.hw_rev = ioc->pdev->revision;
1131         karg.pci_id = ioc->pdev->device;
1132         karg.subsystem_device = ioc->pdev->subsystem_device;
1133         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1134         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1135         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1136         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1137         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1138         karg.firmware_version = ioc->facts.FWVersion.Word;
1139         strcpy(karg.driver_version, ioc->driver_name);
1140         strcat(karg.driver_version, "-");
1141         switch  (ioc->hba_mpi_version_belonged) {
1142         case MPI2_VERSION:
1143                 if (ioc->is_warpdrive)
1144                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1145                 else
1146                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1147                 strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1148                 break;
1149         case MPI25_VERSION:
1150         case MPI26_VERSION:
1151                 if (ioc->is_gen35_ioc)
1152                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS35;
1153                 else
1154                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS3;
1155                 strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
1156                 break;
1157         }
1158         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1159
1160         if (copy_to_user(arg, &karg, sizeof(karg))) {
1161                 pr_err("failure at %s:%d/%s()!\n",
1162                     __FILE__, __LINE__, __func__);
1163                 return -EFAULT;
1164         }
1165         return 0;
1166 }
1167
1168 /**
1169  * _ctl_eventquery - main handler for MPT3EVENTQUERY opcode
1170  * @ioc: per adapter object
1171  * @arg - user space buffer containing ioctl content
1172  */
1173 static long
1174 _ctl_eventquery(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1175 {
1176         struct mpt3_ioctl_eventquery karg;
1177
1178         if (copy_from_user(&karg, arg, sizeof(karg))) {
1179                 pr_err("failure at %s:%d/%s()!\n",
1180                     __FILE__, __LINE__, __func__);
1181                 return -EFAULT;
1182         }
1183
1184         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
1185             __func__));
1186
1187         karg.event_entries = MPT3SAS_CTL_EVENT_LOG_SIZE;
1188         memcpy(karg.event_types, ioc->event_type,
1189             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1190
1191         if (copy_to_user(arg, &karg, sizeof(karg))) {
1192                 pr_err("failure at %s:%d/%s()!\n",
1193                     __FILE__, __LINE__, __func__);
1194                 return -EFAULT;
1195         }
1196         return 0;
1197 }
1198
1199 /**
1200  * _ctl_eventenable - main handler for MPT3EVENTENABLE opcode
1201  * @ioc: per adapter object
1202  * @arg - user space buffer containing ioctl content
1203  */
1204 static long
1205 _ctl_eventenable(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1206 {
1207         struct mpt3_ioctl_eventenable karg;
1208
1209         if (copy_from_user(&karg, arg, sizeof(karg))) {
1210                 pr_err("failure at %s:%d/%s()!\n",
1211                     __FILE__, __LINE__, __func__);
1212                 return -EFAULT;
1213         }
1214
1215         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
1216             __func__));
1217
1218         memcpy(ioc->event_type, karg.event_types,
1219             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1220         mpt3sas_base_validate_event_type(ioc, ioc->event_type);
1221
1222         if (ioc->event_log)
1223                 return 0;
1224         /* initialize event_log */
1225         ioc->event_context = 0;
1226         ioc->aen_event_read_flag = 0;
1227         ioc->event_log = kcalloc(MPT3SAS_CTL_EVENT_LOG_SIZE,
1228             sizeof(struct MPT3_IOCTL_EVENTS), GFP_KERNEL);
1229         if (!ioc->event_log) {
1230                 pr_err("failure at %s:%d/%s()!\n",
1231                     __FILE__, __LINE__, __func__);
1232                 return -ENOMEM;
1233         }
1234         return 0;
1235 }
1236
1237 /**
1238  * _ctl_eventreport - main handler for MPT3EVENTREPORT opcode
1239  * @ioc: per adapter object
1240  * @arg - user space buffer containing ioctl content
1241  */
1242 static long
1243 _ctl_eventreport(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1244 {
1245         struct mpt3_ioctl_eventreport karg;
1246         u32 number_bytes, max_events, max;
1247         struct mpt3_ioctl_eventreport __user *uarg = arg;
1248
1249         if (copy_from_user(&karg, arg, sizeof(karg))) {
1250                 pr_err("failure at %s:%d/%s()!\n",
1251                     __FILE__, __LINE__, __func__);
1252                 return -EFAULT;
1253         }
1254
1255         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
1256             __func__));
1257
1258         number_bytes = karg.hdr.max_data_size -
1259             sizeof(struct mpt3_ioctl_header);
1260         max_events = number_bytes/sizeof(struct MPT3_IOCTL_EVENTS);
1261         max = min_t(u32, MPT3SAS_CTL_EVENT_LOG_SIZE, max_events);
1262
1263         /* If fewer than 1 event is requested, there must have
1264          * been some type of error.
1265          */
1266         if (!max || !ioc->event_log)
1267                 return -ENODATA;
1268
1269         number_bytes = max * sizeof(struct MPT3_IOCTL_EVENTS);
1270         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1271                 pr_err("failure at %s:%d/%s()!\n",
1272                     __FILE__, __LINE__, __func__);
1273                 return -EFAULT;
1274         }
1275
1276         /* reset flag so SIGIO can restart */
1277         ioc->aen_event_read_flag = 0;
1278         return 0;
1279 }
1280
1281 /**
1282  * _ctl_do_reset - main handler for MPT3HARDRESET opcode
1283  * @ioc: per adapter object
1284  * @arg - user space buffer containing ioctl content
1285  */
1286 static long
1287 _ctl_do_reset(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1288 {
1289         struct mpt3_ioctl_diag_reset karg;
1290         int retval;
1291
1292         if (copy_from_user(&karg, arg, sizeof(karg))) {
1293                 pr_err("failure at %s:%d/%s()!\n",
1294                     __FILE__, __LINE__, __func__);
1295                 return -EFAULT;
1296         }
1297
1298         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1299             ioc->is_driver_loading)
1300                 return -EAGAIN;
1301
1302         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: enter\n", ioc->name,
1303             __func__));
1304
1305         retval = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1306         pr_info(MPT3SAS_FMT "host reset: %s\n",
1307             ioc->name, ((!retval) ? "SUCCESS" : "FAILED"));
1308         return 0;
1309 }
1310
1311 /**
1312  * _ctl_btdh_search_sas_device - searching for sas device
1313  * @ioc: per adapter object
1314  * @btdh: btdh ioctl payload
1315  */
1316 static int
1317 _ctl_btdh_search_sas_device(struct MPT3SAS_ADAPTER *ioc,
1318         struct mpt3_ioctl_btdh_mapping *btdh)
1319 {
1320         struct _sas_device *sas_device;
1321         unsigned long flags;
1322         int rc = 0;
1323
1324         if (list_empty(&ioc->sas_device_list))
1325                 return rc;
1326
1327         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1328         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1329                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1330                     btdh->handle == sas_device->handle) {
1331                         btdh->bus = sas_device->channel;
1332                         btdh->id = sas_device->id;
1333                         rc = 1;
1334                         goto out;
1335                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1336                     sas_device->id && btdh->handle == 0xFFFF) {
1337                         btdh->handle = sas_device->handle;
1338                         rc = 1;
1339                         goto out;
1340                 }
1341         }
1342  out:
1343         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1344         return rc;
1345 }
1346
1347 /**
1348  * _ctl_btdh_search_pcie_device - searching for pcie device
1349  * @ioc: per adapter object
1350  * @btdh: btdh ioctl payload
1351  */
1352 static int
1353 _ctl_btdh_search_pcie_device(struct MPT3SAS_ADAPTER *ioc,
1354         struct mpt3_ioctl_btdh_mapping *btdh)
1355 {
1356         struct _pcie_device *pcie_device;
1357         unsigned long flags;
1358         int rc = 0;
1359
1360         if (list_empty(&ioc->pcie_device_list))
1361                 return rc;
1362
1363         spin_lock_irqsave(&ioc->pcie_device_lock, flags);
1364         list_for_each_entry(pcie_device, &ioc->pcie_device_list, list) {
1365                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1366                            btdh->handle == pcie_device->handle) {
1367                         btdh->bus = pcie_device->channel;
1368                         btdh->id = pcie_device->id;
1369                         rc = 1;
1370                         goto out;
1371                 } else if (btdh->bus == pcie_device->channel && btdh->id ==
1372                            pcie_device->id && btdh->handle == 0xFFFF) {
1373                         btdh->handle = pcie_device->handle;
1374                         rc = 1;
1375                         goto out;
1376                 }
1377         }
1378  out:
1379         spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
1380         return rc;
1381 }
1382
1383 /**
1384  * _ctl_btdh_search_raid_device - searching for raid device
1385  * @ioc: per adapter object
1386  * @btdh: btdh ioctl payload
1387  */
1388 static int
1389 _ctl_btdh_search_raid_device(struct MPT3SAS_ADAPTER *ioc,
1390         struct mpt3_ioctl_btdh_mapping *btdh)
1391 {
1392         struct _raid_device *raid_device;
1393         unsigned long flags;
1394         int rc = 0;
1395
1396         if (list_empty(&ioc->raid_device_list))
1397                 return rc;
1398
1399         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1400         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1401                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1402                     btdh->handle == raid_device->handle) {
1403                         btdh->bus = raid_device->channel;
1404                         btdh->id = raid_device->id;
1405                         rc = 1;
1406                         goto out;
1407                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1408                     raid_device->id && btdh->handle == 0xFFFF) {
1409                         btdh->handle = raid_device->handle;
1410                         rc = 1;
1411                         goto out;
1412                 }
1413         }
1414  out:
1415         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1416         return rc;
1417 }
1418
1419 /**
1420  * _ctl_btdh_mapping - main handler for MPT3BTDHMAPPING opcode
1421  * @ioc: per adapter object
1422  * @arg - user space buffer containing ioctl content
1423  */
1424 static long
1425 _ctl_btdh_mapping(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1426 {
1427         struct mpt3_ioctl_btdh_mapping karg;
1428         int rc;
1429
1430         if (copy_from_user(&karg, arg, sizeof(karg))) {
1431                 pr_err("failure at %s:%d/%s()!\n",
1432                     __FILE__, __LINE__, __func__);
1433                 return -EFAULT;
1434         }
1435
1436         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
1437             __func__));
1438
1439         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1440         if (!rc)
1441                 rc = _ctl_btdh_search_pcie_device(ioc, &karg);
1442         if (!rc)
1443                 _ctl_btdh_search_raid_device(ioc, &karg);
1444
1445         if (copy_to_user(arg, &karg, sizeof(karg))) {
1446                 pr_err("failure at %s:%d/%s()!\n",
1447                     __FILE__, __LINE__, __func__);
1448                 return -EFAULT;
1449         }
1450         return 0;
1451 }
1452
1453 /**
1454  * _ctl_diag_capability - return diag buffer capability
1455  * @ioc: per adapter object
1456  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1457  *
1458  * returns 1 when diag buffer support is enabled in firmware
1459  */
1460 static u8
1461 _ctl_diag_capability(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type)
1462 {
1463         u8 rc = 0;
1464
1465         switch (buffer_type) {
1466         case MPI2_DIAG_BUF_TYPE_TRACE:
1467                 if (ioc->facts.IOCCapabilities &
1468                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1469                         rc = 1;
1470                 break;
1471         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1472                 if (ioc->facts.IOCCapabilities &
1473                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1474                         rc = 1;
1475                 break;
1476         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1477                 if (ioc->facts.IOCCapabilities &
1478                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1479                         rc = 1;
1480         }
1481
1482         return rc;
1483 }
1484
1485
1486 /**
1487  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1488  * @ioc: per adapter object
1489  * @diag_register: the diag_register struct passed in from user space
1490  *
1491  */
1492 static long
1493 _ctl_diag_register_2(struct MPT3SAS_ADAPTER *ioc,
1494         struct mpt3_diag_register *diag_register)
1495 {
1496         int rc, i;
1497         void *request_data = NULL;
1498         dma_addr_t request_data_dma;
1499         u32 request_data_sz = 0;
1500         Mpi2DiagBufferPostRequest_t *mpi_request;
1501         Mpi2DiagBufferPostReply_t *mpi_reply;
1502         u8 buffer_type;
1503         u16 smid;
1504         u16 ioc_status;
1505         u32 ioc_state;
1506         u8 issue_reset = 0;
1507
1508         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
1509             __func__));
1510
1511         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1512         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1513                 pr_err(MPT3SAS_FMT
1514                     "%s: failed due to ioc not operational\n",
1515                     ioc->name, __func__);
1516                 rc = -EAGAIN;
1517                 goto out;
1518         }
1519
1520         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
1521                 pr_err(MPT3SAS_FMT "%s: ctl_cmd in use\n",
1522                     ioc->name, __func__);
1523                 rc = -EAGAIN;
1524                 goto out;
1525         }
1526
1527         buffer_type = diag_register->buffer_type;
1528         if (!_ctl_diag_capability(ioc, buffer_type)) {
1529                 pr_err(MPT3SAS_FMT
1530                         "%s: doesn't have capability for buffer_type(0x%02x)\n",
1531                         ioc->name, __func__, buffer_type);
1532                 return -EPERM;
1533         }
1534
1535         if (ioc->diag_buffer_status[buffer_type] &
1536             MPT3_DIAG_BUFFER_IS_REGISTERED) {
1537                 pr_err(MPT3SAS_FMT
1538                         "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1539                         ioc->name, __func__,
1540                     buffer_type);
1541                 return -EINVAL;
1542         }
1543
1544         if (diag_register->requested_buffer_size % 4)  {
1545                 pr_err(MPT3SAS_FMT
1546                         "%s: the requested_buffer_size is not 4 byte aligned\n",
1547                         ioc->name, __func__);
1548                 return -EINVAL;
1549         }
1550
1551         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1552         if (!smid) {
1553                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
1554                     ioc->name, __func__);
1555                 rc = -EAGAIN;
1556                 goto out;
1557         }
1558
1559         rc = 0;
1560         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
1561         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1562         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1563         ioc->ctl_cmds.smid = smid;
1564
1565         request_data = ioc->diag_buffer[buffer_type];
1566         request_data_sz = diag_register->requested_buffer_size;
1567         ioc->unique_id[buffer_type] = diag_register->unique_id;
1568         ioc->diag_buffer_status[buffer_type] = 0;
1569         memcpy(ioc->product_specific[buffer_type],
1570             diag_register->product_specific, MPT3_PRODUCT_SPECIFIC_DWORDS);
1571         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1572
1573         if (request_data) {
1574                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1575                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1576                         pci_free_consistent(ioc->pdev,
1577                             ioc->diag_buffer_sz[buffer_type],
1578                             request_data, request_data_dma);
1579                         request_data = NULL;
1580                 }
1581         }
1582
1583         if (request_data == NULL) {
1584                 ioc->diag_buffer_sz[buffer_type] = 0;
1585                 ioc->diag_buffer_dma[buffer_type] = 0;
1586                 request_data = pci_alloc_consistent(
1587                         ioc->pdev, request_data_sz, &request_data_dma);
1588                 if (request_data == NULL) {
1589                         pr_err(MPT3SAS_FMT "%s: failed allocating memory" \
1590                             " for diag buffers, requested size(%d)\n",
1591                             ioc->name, __func__, request_data_sz);
1592                         mpt3sas_base_free_smid(ioc, smid);
1593                         return -ENOMEM;
1594                 }
1595                 ioc->diag_buffer[buffer_type] = request_data;
1596                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1597                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1598         }
1599
1600         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1601         mpi_request->BufferType = diag_register->buffer_type;
1602         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1603         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1604         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1605         mpi_request->VF_ID = 0; /* TODO */
1606         mpi_request->VP_ID = 0;
1607
1608         dctlprintk(ioc, pr_info(MPT3SAS_FMT
1609                 "%s: diag_buffer(0x%p), dma(0x%llx), sz(%d)\n",
1610                 ioc->name, __func__, request_data,
1611             (unsigned long long)request_data_dma,
1612             le32_to_cpu(mpi_request->BufferLength)));
1613
1614         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
1615                 mpi_request->ProductSpecific[i] =
1616                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1617
1618         init_completion(&ioc->ctl_cmds.done);
1619         mpt3sas_base_put_smid_default(ioc, smid);
1620         wait_for_completion_timeout(&ioc->ctl_cmds.done,
1621             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
1622
1623         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1624                 pr_err(MPT3SAS_FMT "%s: timeout\n", ioc->name,
1625                     __func__);
1626                 _debug_dump_mf(mpi_request,
1627                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
1628                 if (!(ioc->ctl_cmds.status & MPT3_CMD_RESET))
1629                         issue_reset = 1;
1630                 goto issue_host_reset;
1631         }
1632
1633         /* process the completed Reply Message Frame */
1634         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
1635                 pr_err(MPT3SAS_FMT "%s: no reply message\n",
1636                     ioc->name, __func__);
1637                 rc = -EFAULT;
1638                 goto out;
1639         }
1640
1641         mpi_reply = ioc->ctl_cmds.reply;
1642         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1643
1644         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1645                 ioc->diag_buffer_status[buffer_type] |=
1646                         MPT3_DIAG_BUFFER_IS_REGISTERED;
1647                 dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: success\n",
1648                     ioc->name, __func__));
1649         } else {
1650                 pr_info(MPT3SAS_FMT
1651                         "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
1652                         ioc->name, __func__,
1653                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1654                 rc = -EFAULT;
1655         }
1656
1657  issue_host_reset:
1658         if (issue_reset)
1659                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1660
1661  out:
1662
1663         if (rc && request_data)
1664                 pci_free_consistent(ioc->pdev, request_data_sz,
1665                     request_data, request_data_dma);
1666
1667         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1668         return rc;
1669 }
1670
1671 /**
1672  * mpt3sas_enable_diag_buffer - enabling diag_buffers support driver load time
1673  * @ioc: per adapter object
1674  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1675  *
1676  * This is called when command line option diag_buffer_enable is enabled
1677  * at driver load time.
1678  */
1679 void
1680 mpt3sas_enable_diag_buffer(struct MPT3SAS_ADAPTER *ioc, u8 bits_to_register)
1681 {
1682         struct mpt3_diag_register diag_register;
1683
1684         memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
1685
1686         if (bits_to_register & 1) {
1687                 pr_info(MPT3SAS_FMT "registering trace buffer support\n",
1688                     ioc->name);
1689                 ioc->diag_trigger_master.MasterData =
1690                     (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
1691                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1692                 /* register for 2MB buffers  */
1693                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1694                 diag_register.unique_id = 0x7075900;
1695                 _ctl_diag_register_2(ioc,  &diag_register);
1696         }
1697
1698         if (bits_to_register & 2) {
1699                 pr_info(MPT3SAS_FMT "registering snapshot buffer support\n",
1700                     ioc->name);
1701                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1702                 /* register for 2MB buffers  */
1703                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1704                 diag_register.unique_id = 0x7075901;
1705                 _ctl_diag_register_2(ioc,  &diag_register);
1706         }
1707
1708         if (bits_to_register & 4) {
1709                 pr_info(MPT3SAS_FMT "registering extended buffer support\n",
1710                     ioc->name);
1711                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1712                 /* register for 2MB buffers  */
1713                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1714                 diag_register.unique_id = 0x7075901;
1715                 _ctl_diag_register_2(ioc,  &diag_register);
1716         }
1717 }
1718
1719 /**
1720  * _ctl_diag_register - application register with driver
1721  * @ioc: per adapter object
1722  * @arg - user space buffer containing ioctl content
1723  *
1724  * This will allow the driver to setup any required buffers that will be
1725  * needed by firmware to communicate with the driver.
1726  */
1727 static long
1728 _ctl_diag_register(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1729 {
1730         struct mpt3_diag_register karg;
1731         long rc;
1732
1733         if (copy_from_user(&karg, arg, sizeof(karg))) {
1734                 pr_err("failure at %s:%d/%s()!\n",
1735                     __FILE__, __LINE__, __func__);
1736                 return -EFAULT;
1737         }
1738
1739         rc = _ctl_diag_register_2(ioc, &karg);
1740         return rc;
1741 }
1742
1743 /**
1744  * _ctl_diag_unregister - application unregister with driver
1745  * @ioc: per adapter object
1746  * @arg - user space buffer containing ioctl content
1747  *
1748  * This will allow the driver to cleanup any memory allocated for diag
1749  * messages and to free up any resources.
1750  */
1751 static long
1752 _ctl_diag_unregister(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1753 {
1754         struct mpt3_diag_unregister karg;
1755         void *request_data;
1756         dma_addr_t request_data_dma;
1757         u32 request_data_sz;
1758         u8 buffer_type;
1759
1760         if (copy_from_user(&karg, arg, sizeof(karg))) {
1761                 pr_err("failure at %s:%d/%s()!\n",
1762                     __FILE__, __LINE__, __func__);
1763                 return -EFAULT;
1764         }
1765
1766         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
1767             __func__));
1768
1769         buffer_type = karg.unique_id & 0x000000ff;
1770         if (!_ctl_diag_capability(ioc, buffer_type)) {
1771                 pr_err(MPT3SAS_FMT
1772                         "%s: doesn't have capability for buffer_type(0x%02x)\n",
1773                         ioc->name, __func__, buffer_type);
1774                 return -EPERM;
1775         }
1776
1777         if ((ioc->diag_buffer_status[buffer_type] &
1778             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
1779                 pr_err(MPT3SAS_FMT
1780                         "%s: buffer_type(0x%02x) is not registered\n",
1781                         ioc->name, __func__, buffer_type);
1782                 return -EINVAL;
1783         }
1784         if ((ioc->diag_buffer_status[buffer_type] &
1785             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
1786                 pr_err(MPT3SAS_FMT
1787                         "%s: buffer_type(0x%02x) has not been released\n",
1788                         ioc->name, __func__, buffer_type);
1789                 return -EINVAL;
1790         }
1791
1792         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1793                 pr_err(MPT3SAS_FMT
1794                         "%s: unique_id(0x%08x) is not registered\n",
1795                         ioc->name, __func__, karg.unique_id);
1796                 return -EINVAL;
1797         }
1798
1799         request_data = ioc->diag_buffer[buffer_type];
1800         if (!request_data) {
1801                 pr_err(MPT3SAS_FMT
1802                         "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
1803                         ioc->name, __func__, buffer_type);
1804                 return -ENOMEM;
1805         }
1806
1807         request_data_sz = ioc->diag_buffer_sz[buffer_type];
1808         request_data_dma = ioc->diag_buffer_dma[buffer_type];
1809         pci_free_consistent(ioc->pdev, request_data_sz,
1810             request_data, request_data_dma);
1811         ioc->diag_buffer[buffer_type] = NULL;
1812         ioc->diag_buffer_status[buffer_type] = 0;
1813         return 0;
1814 }
1815
1816 /**
1817  * _ctl_diag_query - query relevant info associated with diag buffers
1818  * @ioc: per adapter object
1819  * @arg - user space buffer containing ioctl content
1820  *
1821  * The application will send only buffer_type and unique_id.  Driver will
1822  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
1823  * 0x00, the driver will return info specified by Buffer Type.
1824  */
1825 static long
1826 _ctl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1827 {
1828         struct mpt3_diag_query karg;
1829         void *request_data;
1830         int i;
1831         u8 buffer_type;
1832
1833         if (copy_from_user(&karg, arg, sizeof(karg))) {
1834                 pr_err("failure at %s:%d/%s()!\n",
1835                     __FILE__, __LINE__, __func__);
1836                 return -EFAULT;
1837         }
1838
1839         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
1840             __func__));
1841
1842         karg.application_flags = 0;
1843         buffer_type = karg.buffer_type;
1844
1845         if (!_ctl_diag_capability(ioc, buffer_type)) {
1846                 pr_err(MPT3SAS_FMT
1847                         "%s: doesn't have capability for buffer_type(0x%02x)\n",
1848                         ioc->name, __func__, buffer_type);
1849                 return -EPERM;
1850         }
1851
1852         if ((ioc->diag_buffer_status[buffer_type] &
1853             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
1854                 pr_err(MPT3SAS_FMT
1855                         "%s: buffer_type(0x%02x) is not registered\n",
1856                         ioc->name, __func__, buffer_type);
1857                 return -EINVAL;
1858         }
1859
1860         if (karg.unique_id & 0xffffff00) {
1861                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
1862                         pr_err(MPT3SAS_FMT
1863                                 "%s: unique_id(0x%08x) is not registered\n",
1864                                 ioc->name, __func__, karg.unique_id);
1865                         return -EINVAL;
1866                 }
1867         }
1868
1869         request_data = ioc->diag_buffer[buffer_type];
1870         if (!request_data) {
1871                 pr_err(MPT3SAS_FMT
1872                         "%s: doesn't have buffer for buffer_type(0x%02x)\n",
1873                         ioc->name, __func__, buffer_type);
1874                 return -ENOMEM;
1875         }
1876
1877         if (ioc->diag_buffer_status[buffer_type] & MPT3_DIAG_BUFFER_IS_RELEASED)
1878                 karg.application_flags = (MPT3_APP_FLAGS_APP_OWNED |
1879                     MPT3_APP_FLAGS_BUFFER_VALID);
1880         else
1881                 karg.application_flags = (MPT3_APP_FLAGS_APP_OWNED |
1882                     MPT3_APP_FLAGS_BUFFER_VALID |
1883                     MPT3_APP_FLAGS_FW_BUFFER_ACCESS);
1884
1885         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
1886                 karg.product_specific[i] =
1887                     ioc->product_specific[buffer_type][i];
1888
1889         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
1890         karg.driver_added_buffer_size = 0;
1891         karg.unique_id = ioc->unique_id[buffer_type];
1892         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
1893
1894         if (copy_to_user(arg, &karg, sizeof(struct mpt3_diag_query))) {
1895                 pr_err(MPT3SAS_FMT
1896                         "%s: unable to write mpt3_diag_query data @ %p\n",
1897                         ioc->name, __func__, arg);
1898                 return -EFAULT;
1899         }
1900         return 0;
1901 }
1902
1903 /**
1904  * mpt3sas_send_diag_release - Diag Release Message
1905  * @ioc: per adapter object
1906  * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
1907  * @issue_reset - specifies whether host reset is required.
1908  *
1909  */
1910 int
1911 mpt3sas_send_diag_release(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type,
1912         u8 *issue_reset)
1913 {
1914         Mpi2DiagReleaseRequest_t *mpi_request;
1915         Mpi2DiagReleaseReply_t *mpi_reply;
1916         u16 smid;
1917         u16 ioc_status;
1918         u32 ioc_state;
1919         int rc;
1920
1921         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
1922             __func__));
1923
1924         rc = 0;
1925         *issue_reset = 0;
1926
1927         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1928         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1929                 if (ioc->diag_buffer_status[buffer_type] &
1930                     MPT3_DIAG_BUFFER_IS_REGISTERED)
1931                         ioc->diag_buffer_status[buffer_type] |=
1932                             MPT3_DIAG_BUFFER_IS_RELEASED;
1933                 dctlprintk(ioc, pr_info(MPT3SAS_FMT
1934                         "%s: skipping due to FAULT state\n", ioc->name,
1935                     __func__));
1936                 rc = -EAGAIN;
1937                 goto out;
1938         }
1939
1940         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
1941                 pr_err(MPT3SAS_FMT "%s: ctl_cmd in use\n",
1942                     ioc->name, __func__);
1943                 rc = -EAGAIN;
1944                 goto out;
1945         }
1946
1947         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1948         if (!smid) {
1949                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
1950                     ioc->name, __func__);
1951                 rc = -EAGAIN;
1952                 goto out;
1953         }
1954
1955         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
1956         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1957         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1958         ioc->ctl_cmds.smid = smid;
1959
1960         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
1961         mpi_request->BufferType = buffer_type;
1962         mpi_request->VF_ID = 0; /* TODO */
1963         mpi_request->VP_ID = 0;
1964
1965         init_completion(&ioc->ctl_cmds.done);
1966         mpt3sas_base_put_smid_default(ioc, smid);
1967         wait_for_completion_timeout(&ioc->ctl_cmds.done,
1968             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
1969
1970         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1971                 pr_err(MPT3SAS_FMT "%s: timeout\n", ioc->name,
1972                     __func__);
1973                 _debug_dump_mf(mpi_request,
1974                     sizeof(Mpi2DiagReleaseRequest_t)/4);
1975                 if (!(ioc->ctl_cmds.status & MPT3_CMD_RESET))
1976                         *issue_reset = 1;
1977                 rc = -EFAULT;
1978                 goto out;
1979         }
1980
1981         /* process the completed Reply Message Frame */
1982         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
1983                 pr_err(MPT3SAS_FMT "%s: no reply message\n",
1984                     ioc->name, __func__);
1985                 rc = -EFAULT;
1986                 goto out;
1987         }
1988
1989         mpi_reply = ioc->ctl_cmds.reply;
1990         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1991
1992         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1993                 ioc->diag_buffer_status[buffer_type] |=
1994                     MPT3_DIAG_BUFFER_IS_RELEASED;
1995                 dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: success\n",
1996                     ioc->name, __func__));
1997         } else {
1998                 pr_info(MPT3SAS_FMT
1999                         "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2000                         ioc->name, __func__,
2001                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2002                 rc = -EFAULT;
2003         }
2004
2005  out:
2006         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2007         return rc;
2008 }
2009
2010 /**
2011  * _ctl_diag_release - request to send Diag Release Message to firmware
2012  * @arg - user space buffer containing ioctl content
2013  *
2014  * This allows ownership of the specified buffer to returned to the driver,
2015  * allowing an application to read the buffer without fear that firmware is
2016  * overwriting information in the buffer.
2017  */
2018 static long
2019 _ctl_diag_release(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2020 {
2021         struct mpt3_diag_release karg;
2022         void *request_data;
2023         int rc;
2024         u8 buffer_type;
2025         u8 issue_reset = 0;
2026
2027         if (copy_from_user(&karg, arg, sizeof(karg))) {
2028                 pr_err("failure at %s:%d/%s()!\n",
2029                     __FILE__, __LINE__, __func__);
2030                 return -EFAULT;
2031         }
2032
2033         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
2034             __func__));
2035
2036         buffer_type = karg.unique_id & 0x000000ff;
2037         if (!_ctl_diag_capability(ioc, buffer_type)) {
2038                 pr_err(MPT3SAS_FMT
2039                         "%s: doesn't have capability for buffer_type(0x%02x)\n",
2040                         ioc->name, __func__, buffer_type);
2041                 return -EPERM;
2042         }
2043
2044         if ((ioc->diag_buffer_status[buffer_type] &
2045             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2046                 pr_err(MPT3SAS_FMT
2047                         "%s: buffer_type(0x%02x) is not registered\n",
2048                         ioc->name, __func__, buffer_type);
2049                 return -EINVAL;
2050         }
2051
2052         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2053                 pr_err(MPT3SAS_FMT
2054                         "%s: unique_id(0x%08x) is not registered\n",
2055                         ioc->name, __func__, karg.unique_id);
2056                 return -EINVAL;
2057         }
2058
2059         if (ioc->diag_buffer_status[buffer_type] &
2060             MPT3_DIAG_BUFFER_IS_RELEASED) {
2061                 pr_err(MPT3SAS_FMT
2062                         "%s: buffer_type(0x%02x) is already released\n",
2063                         ioc->name, __func__,
2064                     buffer_type);
2065                 return 0;
2066         }
2067
2068         request_data = ioc->diag_buffer[buffer_type];
2069
2070         if (!request_data) {
2071                 pr_err(MPT3SAS_FMT
2072                         "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
2073                         ioc->name, __func__, buffer_type);
2074                 return -ENOMEM;
2075         }
2076
2077         /* buffers were released by due to host reset */
2078         if ((ioc->diag_buffer_status[buffer_type] &
2079             MPT3_DIAG_BUFFER_IS_DIAG_RESET)) {
2080                 ioc->diag_buffer_status[buffer_type] |=
2081                     MPT3_DIAG_BUFFER_IS_RELEASED;
2082                 ioc->diag_buffer_status[buffer_type] &=
2083                     ~MPT3_DIAG_BUFFER_IS_DIAG_RESET;
2084                 pr_err(MPT3SAS_FMT
2085                         "%s: buffer_type(0x%02x) was released due to host reset\n",
2086                         ioc->name, __func__, buffer_type);
2087                 return 0;
2088         }
2089
2090         rc = mpt3sas_send_diag_release(ioc, buffer_type, &issue_reset);
2091
2092         if (issue_reset)
2093                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2094
2095         return rc;
2096 }
2097
2098 /**
2099  * _ctl_diag_read_buffer - request for copy of the diag buffer
2100  * @ioc: per adapter object
2101  * @arg - user space buffer containing ioctl content
2102  */
2103 static long
2104 _ctl_diag_read_buffer(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2105 {
2106         struct mpt3_diag_read_buffer karg;
2107         struct mpt3_diag_read_buffer __user *uarg = arg;
2108         void *request_data, *diag_data;
2109         Mpi2DiagBufferPostRequest_t *mpi_request;
2110         Mpi2DiagBufferPostReply_t *mpi_reply;
2111         int rc, i;
2112         u8 buffer_type;
2113         unsigned long request_size, copy_size;
2114         u16 smid;
2115         u16 ioc_status;
2116         u8 issue_reset = 0;
2117
2118         if (copy_from_user(&karg, arg, sizeof(karg))) {
2119                 pr_err("failure at %s:%d/%s()!\n",
2120                     __FILE__, __LINE__, __func__);
2121                 return -EFAULT;
2122         }
2123
2124         dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s\n", ioc->name,
2125             __func__));
2126
2127         buffer_type = karg.unique_id & 0x000000ff;
2128         if (!_ctl_diag_capability(ioc, buffer_type)) {
2129                 pr_err(MPT3SAS_FMT
2130                         "%s: doesn't have capability for buffer_type(0x%02x)\n",
2131                         ioc->name, __func__, buffer_type);
2132                 return -EPERM;
2133         }
2134
2135         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2136                 pr_err(MPT3SAS_FMT
2137                         "%s: unique_id(0x%08x) is not registered\n",
2138                         ioc->name, __func__, karg.unique_id);
2139                 return -EINVAL;
2140         }
2141
2142         request_data = ioc->diag_buffer[buffer_type];
2143         if (!request_data) {
2144                 pr_err(MPT3SAS_FMT
2145                         "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2146                         ioc->name, __func__, buffer_type);
2147                 return -ENOMEM;
2148         }
2149
2150         request_size = ioc->diag_buffer_sz[buffer_type];
2151
2152         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
2153                 pr_err(MPT3SAS_FMT "%s: either the starting_offset " \
2154                     "or bytes_to_read are not 4 byte aligned\n", ioc->name,
2155                     __func__);
2156                 return -EINVAL;
2157         }
2158
2159         if (karg.starting_offset > request_size)
2160                 return -EINVAL;
2161
2162         diag_data = (void *)(request_data + karg.starting_offset);
2163         dctlprintk(ioc, pr_info(MPT3SAS_FMT
2164                 "%s: diag_buffer(%p), offset(%d), sz(%d)\n",
2165                 ioc->name, __func__,
2166             diag_data, karg.starting_offset, karg.bytes_to_read));
2167
2168         /* Truncate data on requests that are too large */
2169         if ((diag_data + karg.bytes_to_read < diag_data) ||
2170             (diag_data + karg.bytes_to_read > request_data + request_size))
2171                 copy_size = request_size - karg.starting_offset;
2172         else
2173                 copy_size = karg.bytes_to_read;
2174
2175         if (copy_to_user((void __user *)uarg->diagnostic_data,
2176             diag_data, copy_size)) {
2177                 pr_err(MPT3SAS_FMT
2178                         "%s: Unable to write mpt_diag_read_buffer_t data @ %p\n",
2179                         ioc->name, __func__, diag_data);
2180                 return -EFAULT;
2181         }
2182
2183         if ((karg.flags & MPT3_FLAGS_REREGISTER) == 0)
2184                 return 0;
2185
2186         dctlprintk(ioc, pr_info(MPT3SAS_FMT
2187                 "%s: Reregister buffer_type(0x%02x)\n",
2188                 ioc->name, __func__, buffer_type));
2189         if ((ioc->diag_buffer_status[buffer_type] &
2190             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2191                 dctlprintk(ioc, pr_info(MPT3SAS_FMT
2192                         "%s: buffer_type(0x%02x) is still registered\n",
2193                         ioc->name, __func__, buffer_type));
2194                 return 0;
2195         }
2196         /* Get a free request frame and save the message context.
2197         */
2198
2199         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2200                 pr_err(MPT3SAS_FMT "%s: ctl_cmd in use\n",
2201                     ioc->name, __func__);
2202                 rc = -EAGAIN;
2203                 goto out;
2204         }
2205
2206         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2207         if (!smid) {
2208                 pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
2209                     ioc->name, __func__);
2210                 rc = -EAGAIN;
2211                 goto out;
2212         }
2213
2214         rc = 0;
2215         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2216         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2217         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2218         ioc->ctl_cmds.smid = smid;
2219
2220         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2221         mpi_request->BufferType = buffer_type;
2222         mpi_request->BufferLength =
2223             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2224         mpi_request->BufferAddress =
2225             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2226         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2227                 mpi_request->ProductSpecific[i] =
2228                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2229         mpi_request->VF_ID = 0; /* TODO */
2230         mpi_request->VP_ID = 0;
2231
2232         init_completion(&ioc->ctl_cmds.done);
2233         mpt3sas_base_put_smid_default(ioc, smid);
2234         wait_for_completion_timeout(&ioc->ctl_cmds.done,
2235             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2236
2237         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2238                 pr_err(MPT3SAS_FMT "%s: timeout\n", ioc->name,
2239                     __func__);
2240                 _debug_dump_mf(mpi_request,
2241                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
2242                 if (!(ioc->ctl_cmds.status & MPT3_CMD_RESET))
2243                         issue_reset = 1;
2244                 goto issue_host_reset;
2245         }
2246
2247         /* process the completed Reply Message Frame */
2248         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2249                 pr_err(MPT3SAS_FMT "%s: no reply message\n",
2250                     ioc->name, __func__);
2251                 rc = -EFAULT;
2252                 goto out;
2253         }
2254
2255         mpi_reply = ioc->ctl_cmds.reply;
2256         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2257
2258         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2259                 ioc->diag_buffer_status[buffer_type] |=
2260                     MPT3_DIAG_BUFFER_IS_REGISTERED;
2261                 dctlprintk(ioc, pr_info(MPT3SAS_FMT "%s: success\n",
2262                     ioc->name, __func__));
2263         } else {
2264                 pr_info(MPT3SAS_FMT
2265                         "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2266                         ioc->name, __func__,
2267                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2268                 rc = -EFAULT;
2269         }
2270
2271  issue_host_reset:
2272         if (issue_reset)
2273                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2274
2275  out:
2276
2277         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2278         return rc;
2279 }
2280
2281
2282
2283 #ifdef CONFIG_COMPAT
2284 /**
2285  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2286  * @ioc: per adapter object
2287  * @cmd - ioctl opcode
2288  * @arg - (struct mpt3_ioctl_command32)
2289  *
2290  * MPT3COMMAND32 - Handle 32bit applications running on 64bit os.
2291  */
2292 static long
2293 _ctl_compat_mpt_command(struct MPT3SAS_ADAPTER *ioc, unsigned cmd,
2294         void __user *arg)
2295 {
2296         struct mpt3_ioctl_command32 karg32;
2297         struct mpt3_ioctl_command32 __user *uarg;
2298         struct mpt3_ioctl_command karg;
2299
2300         if (_IOC_SIZE(cmd) != sizeof(struct mpt3_ioctl_command32))
2301                 return -EINVAL;
2302
2303         uarg = (struct mpt3_ioctl_command32 __user *) arg;
2304
2305         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2306                 pr_err("failure at %s:%d/%s()!\n",
2307                     __FILE__, __LINE__, __func__);
2308                 return -EFAULT;
2309         }
2310
2311         memset(&karg, 0, sizeof(struct mpt3_ioctl_command));
2312         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2313         karg.hdr.port_number = karg32.hdr.port_number;
2314         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2315         karg.timeout = karg32.timeout;
2316         karg.max_reply_bytes = karg32.max_reply_bytes;
2317         karg.data_in_size = karg32.data_in_size;
2318         karg.data_out_size = karg32.data_out_size;
2319         karg.max_sense_bytes = karg32.max_sense_bytes;
2320         karg.data_sge_offset = karg32.data_sge_offset;
2321         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2322         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2323         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2324         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2325         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2326 }
2327 #endif
2328
2329 /**
2330  * _ctl_ioctl_main - main ioctl entry point
2331  * @file - (struct file)
2332  * @cmd - ioctl opcode
2333  * @arg - user space data buffer
2334  * @compat - handles 32 bit applications in 64bit os
2335  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
2336  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
2337  */
2338 static long
2339 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2340         u8 compat, u16 mpi_version)
2341 {
2342         struct MPT3SAS_ADAPTER *ioc;
2343         struct mpt3_ioctl_header ioctl_header;
2344         enum block_state state;
2345         long ret = -EINVAL;
2346
2347         /* get IOCTL header */
2348         if (copy_from_user(&ioctl_header, (char __user *)arg,
2349             sizeof(struct mpt3_ioctl_header))) {
2350                 pr_err("failure at %s:%d/%s()!\n",
2351                     __FILE__, __LINE__, __func__);
2352                 return -EFAULT;
2353         }
2354
2355         if (_ctl_verify_adapter(ioctl_header.ioc_number,
2356                                 &ioc, mpi_version) == -1 || !ioc)
2357                 return -ENODEV;
2358
2359         /* pci_access_mutex lock acquired by ioctl path */
2360         mutex_lock(&ioc->pci_access_mutex);
2361
2362         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2363             ioc->is_driver_loading || ioc->remove_host) {
2364                 ret = -EAGAIN;
2365                 goto out_unlock_pciaccess;
2366         }
2367
2368         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2369         if (state == NON_BLOCKING) {
2370                 if (!mutex_trylock(&ioc->ctl_cmds.mutex)) {
2371                         ret = -EAGAIN;
2372                         goto out_unlock_pciaccess;
2373                 }
2374         } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2375                 ret = -ERESTARTSYS;
2376                 goto out_unlock_pciaccess;
2377         }
2378
2379
2380         switch (cmd) {
2381         case MPT3IOCINFO:
2382                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_iocinfo))
2383                         ret = _ctl_getiocinfo(ioc, arg);
2384                 break;
2385 #ifdef CONFIG_COMPAT
2386         case MPT3COMMAND32:
2387 #endif
2388         case MPT3COMMAND:
2389         {
2390                 struct mpt3_ioctl_command __user *uarg;
2391                 struct mpt3_ioctl_command karg;
2392
2393 #ifdef CONFIG_COMPAT
2394                 if (compat) {
2395                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2396                         break;
2397                 }
2398 #endif
2399                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2400                         pr_err("failure at %s:%d/%s()!\n",
2401                             __FILE__, __LINE__, __func__);
2402                         ret = -EFAULT;
2403                         break;
2404                 }
2405
2406                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_command)) {
2407                         uarg = arg;
2408                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2409                 }
2410                 break;
2411         }
2412         case MPT3EVENTQUERY:
2413                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventquery))
2414                         ret = _ctl_eventquery(ioc, arg);
2415                 break;
2416         case MPT3EVENTENABLE:
2417                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventenable))
2418                         ret = _ctl_eventenable(ioc, arg);
2419                 break;
2420         case MPT3EVENTREPORT:
2421                 ret = _ctl_eventreport(ioc, arg);
2422                 break;
2423         case MPT3HARDRESET:
2424                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_diag_reset))
2425                         ret = _ctl_do_reset(ioc, arg);
2426                 break;
2427         case MPT3BTDHMAPPING:
2428                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_btdh_mapping))
2429                         ret = _ctl_btdh_mapping(ioc, arg);
2430                 break;
2431         case MPT3DIAGREGISTER:
2432                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_register))
2433                         ret = _ctl_diag_register(ioc, arg);
2434                 break;
2435         case MPT3DIAGUNREGISTER:
2436                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_unregister))
2437                         ret = _ctl_diag_unregister(ioc, arg);
2438                 break;
2439         case MPT3DIAGQUERY:
2440                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_query))
2441                         ret = _ctl_diag_query(ioc, arg);
2442                 break;
2443         case MPT3DIAGRELEASE:
2444                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_release))
2445                         ret = _ctl_diag_release(ioc, arg);
2446                 break;
2447         case MPT3DIAGREADBUFFER:
2448                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_read_buffer))
2449                         ret = _ctl_diag_read_buffer(ioc, arg);
2450                 break;
2451         default:
2452                 dctlprintk(ioc, pr_info(MPT3SAS_FMT
2453                     "unsupported ioctl opcode(0x%08x)\n", ioc->name, cmd));
2454                 break;
2455         }
2456
2457         mutex_unlock(&ioc->ctl_cmds.mutex);
2458 out_unlock_pciaccess:
2459         mutex_unlock(&ioc->pci_access_mutex);
2460         return ret;
2461 }
2462
2463 /**
2464  * _ctl_ioctl - mpt3ctl main ioctl entry point (unlocked)
2465  * @file - (struct file)
2466  * @cmd - ioctl opcode
2467  * @arg -
2468  */
2469 static long
2470 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2471 {
2472         long ret;
2473
2474         /* pass MPI25_VERSION | MPI26_VERSION value,
2475          * to indicate that this ioctl cmd
2476          * came from mpt3ctl ioctl device.
2477          */
2478         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0,
2479                 MPI25_VERSION | MPI26_VERSION);
2480         return ret;
2481 }
2482
2483 /**
2484  * _ctl_mpt2_ioctl - mpt2ctl main ioctl entry point (unlocked)
2485  * @file - (struct file)
2486  * @cmd - ioctl opcode
2487  * @arg -
2488  */
2489 static long
2490 _ctl_mpt2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2491 {
2492         long ret;
2493
2494         /* pass MPI2_VERSION value, to indicate that this ioctl cmd
2495          * came from mpt2ctl ioctl device.
2496          */
2497         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI2_VERSION);
2498         return ret;
2499 }
2500 #ifdef CONFIG_COMPAT
2501 /**
2502  *_ ctl_ioctl_compat - main ioctl entry point (compat)
2503  * @file -
2504  * @cmd -
2505  * @arg -
2506  *
2507  * This routine handles 32 bit applications in 64bit os.
2508  */
2509 static long
2510 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2511 {
2512         long ret;
2513
2514         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1,
2515                 MPI25_VERSION | MPI26_VERSION);
2516         return ret;
2517 }
2518
2519 /**
2520  *_ ctl_mpt2_ioctl_compat - main ioctl entry point (compat)
2521  * @file -
2522  * @cmd -
2523  * @arg -
2524  *
2525  * This routine handles 32 bit applications in 64bit os.
2526  */
2527 static long
2528 _ctl_mpt2_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2529 {
2530         long ret;
2531
2532         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI2_VERSION);
2533         return ret;
2534 }
2535 #endif
2536
2537 /* scsi host attributes */
2538 /**
2539  * _ctl_version_fw_show - firmware version
2540  * @cdev - pointer to embedded class device
2541  * @buf - the buffer returned
2542  *
2543  * A sysfs 'read-only' shost attribute.
2544  */
2545 static ssize_t
2546 _ctl_version_fw_show(struct device *cdev, struct device_attribute *attr,
2547         char *buf)
2548 {
2549         struct Scsi_Host *shost = class_to_shost(cdev);
2550         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2551
2552         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2553             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2554             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2555             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2556             ioc->facts.FWVersion.Word & 0x000000FF);
2557 }
2558 static DEVICE_ATTR(version_fw, S_IRUGO, _ctl_version_fw_show, NULL);
2559
2560 /**
2561  * _ctl_version_bios_show - bios version
2562  * @cdev - pointer to embedded class device
2563  * @buf - the buffer returned
2564  *
2565  * A sysfs 'read-only' shost attribute.
2566  */
2567 static ssize_t
2568 _ctl_version_bios_show(struct device *cdev, struct device_attribute *attr,
2569         char *buf)
2570 {
2571         struct Scsi_Host *shost = class_to_shost(cdev);
2572         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2573
2574         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2575
2576         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2577             (version & 0xFF000000) >> 24,
2578             (version & 0x00FF0000) >> 16,
2579             (version & 0x0000FF00) >> 8,
2580             version & 0x000000FF);
2581 }
2582 static DEVICE_ATTR(version_bios, S_IRUGO, _ctl_version_bios_show, NULL);
2583
2584 /**
2585  * _ctl_version_mpi_show - MPI (message passing interface) version
2586  * @cdev - pointer to embedded class device
2587  * @buf - the buffer returned
2588  *
2589  * A sysfs 'read-only' shost attribute.
2590  */
2591 static ssize_t
2592 _ctl_version_mpi_show(struct device *cdev, struct device_attribute *attr,
2593         char *buf)
2594 {
2595         struct Scsi_Host *shost = class_to_shost(cdev);
2596         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2597
2598         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2599             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2600 }
2601 static DEVICE_ATTR(version_mpi, S_IRUGO, _ctl_version_mpi_show, NULL);
2602
2603 /**
2604  * _ctl_version_product_show - product name
2605  * @cdev - pointer to embedded class device
2606  * @buf - the buffer returned
2607  *
2608  * A sysfs 'read-only' shost attribute.
2609  */
2610 static ssize_t
2611 _ctl_version_product_show(struct device *cdev, struct device_attribute *attr,
2612         char *buf)
2613 {
2614         struct Scsi_Host *shost = class_to_shost(cdev);
2615         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2616
2617         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2618 }
2619 static DEVICE_ATTR(version_product, S_IRUGO, _ctl_version_product_show, NULL);
2620
2621 /**
2622  * _ctl_version_nvdata_persistent_show - ndvata persistent version
2623  * @cdev - pointer to embedded class device
2624  * @buf - the buffer returned
2625  *
2626  * A sysfs 'read-only' shost attribute.
2627  */
2628 static ssize_t
2629 _ctl_version_nvdata_persistent_show(struct device *cdev,
2630         struct device_attribute *attr, char *buf)
2631 {
2632         struct Scsi_Host *shost = class_to_shost(cdev);
2633         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2634
2635         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2636             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2637 }
2638 static DEVICE_ATTR(version_nvdata_persistent, S_IRUGO,
2639         _ctl_version_nvdata_persistent_show, NULL);
2640
2641 /**
2642  * _ctl_version_nvdata_default_show - nvdata default version
2643  * @cdev - pointer to embedded class device
2644  * @buf - the buffer returned
2645  *
2646  * A sysfs 'read-only' shost attribute.
2647  */
2648 static ssize_t
2649 _ctl_version_nvdata_default_show(struct device *cdev, struct device_attribute
2650         *attr, char *buf)
2651 {
2652         struct Scsi_Host *shost = class_to_shost(cdev);
2653         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2654
2655         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2656             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2657 }
2658 static DEVICE_ATTR(version_nvdata_default, S_IRUGO,
2659         _ctl_version_nvdata_default_show, NULL);
2660
2661 /**
2662  * _ctl_board_name_show - board name
2663  * @cdev - pointer to embedded class device
2664  * @buf - the buffer returned
2665  *
2666  * A sysfs 'read-only' shost attribute.
2667  */
2668 static ssize_t
2669 _ctl_board_name_show(struct device *cdev, struct device_attribute *attr,
2670         char *buf)
2671 {
2672         struct Scsi_Host *shost = class_to_shost(cdev);
2673         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2674
2675         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2676 }
2677 static DEVICE_ATTR(board_name, S_IRUGO, _ctl_board_name_show, NULL);
2678
2679 /**
2680  * _ctl_board_assembly_show - board assembly name
2681  * @cdev - pointer to embedded class device
2682  * @buf - the buffer returned
2683  *
2684  * A sysfs 'read-only' shost attribute.
2685  */
2686 static ssize_t
2687 _ctl_board_assembly_show(struct device *cdev, struct device_attribute *attr,
2688         char *buf)
2689 {
2690         struct Scsi_Host *shost = class_to_shost(cdev);
2691         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2692
2693         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2694 }
2695 static DEVICE_ATTR(board_assembly, S_IRUGO, _ctl_board_assembly_show, NULL);
2696
2697 /**
2698  * _ctl_board_tracer_show - board tracer number
2699  * @cdev - pointer to embedded class device
2700  * @buf - the buffer returned
2701  *
2702  * A sysfs 'read-only' shost attribute.
2703  */
2704 static ssize_t
2705 _ctl_board_tracer_show(struct device *cdev, struct device_attribute *attr,
2706         char *buf)
2707 {
2708         struct Scsi_Host *shost = class_to_shost(cdev);
2709         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2710
2711         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2712 }
2713 static DEVICE_ATTR(board_tracer, S_IRUGO, _ctl_board_tracer_show, NULL);
2714
2715 /**
2716  * _ctl_io_delay_show - io missing delay
2717  * @cdev - pointer to embedded class device
2718  * @buf - the buffer returned
2719  *
2720  * This is for firmware implemention for deboucing device
2721  * removal events.
2722  *
2723  * A sysfs 'read-only' shost attribute.
2724  */
2725 static ssize_t
2726 _ctl_io_delay_show(struct device *cdev, struct device_attribute *attr,
2727         char *buf)
2728 {
2729         struct Scsi_Host *shost = class_to_shost(cdev);
2730         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2731
2732         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
2733 }
2734 static DEVICE_ATTR(io_delay, S_IRUGO, _ctl_io_delay_show, NULL);
2735
2736 /**
2737  * _ctl_device_delay_show - device missing delay
2738  * @cdev - pointer to embedded class device
2739  * @buf - the buffer returned
2740  *
2741  * This is for firmware implemention for deboucing device
2742  * removal events.
2743  *
2744  * A sysfs 'read-only' shost attribute.
2745  */
2746 static ssize_t
2747 _ctl_device_delay_show(struct device *cdev, struct device_attribute *attr,
2748         char *buf)
2749 {
2750         struct Scsi_Host *shost = class_to_shost(cdev);
2751         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2752
2753         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
2754 }
2755 static DEVICE_ATTR(device_delay, S_IRUGO, _ctl_device_delay_show, NULL);
2756
2757 /**
2758  * _ctl_fw_queue_depth_show - global credits
2759  * @cdev - pointer to embedded class device
2760  * @buf - the buffer returned
2761  *
2762  * This is firmware queue depth limit
2763  *
2764  * A sysfs 'read-only' shost attribute.
2765  */
2766 static ssize_t
2767 _ctl_fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
2768         char *buf)
2769 {
2770         struct Scsi_Host *shost = class_to_shost(cdev);
2771         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2772
2773         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
2774 }
2775 static DEVICE_ATTR(fw_queue_depth, S_IRUGO, _ctl_fw_queue_depth_show, NULL);
2776
2777 /**
2778  * _ctl_sas_address_show - sas address
2779  * @cdev - pointer to embedded class device
2780  * @buf - the buffer returned
2781  *
2782  * This is the controller sas address
2783  *
2784  * A sysfs 'read-only' shost attribute.
2785  */
2786 static ssize_t
2787 _ctl_host_sas_address_show(struct device *cdev, struct device_attribute *attr,
2788         char *buf)
2789
2790 {
2791         struct Scsi_Host *shost = class_to_shost(cdev);
2792         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2793
2794         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2795             (unsigned long long)ioc->sas_hba.sas_address);
2796 }
2797 static DEVICE_ATTR(host_sas_address, S_IRUGO,
2798         _ctl_host_sas_address_show, NULL);
2799
2800 /**
2801  * _ctl_logging_level_show - logging level
2802  * @cdev - pointer to embedded class device
2803  * @buf - the buffer returned
2804  *
2805  * A sysfs 'read/write' shost attribute.
2806  */
2807 static ssize_t
2808 _ctl_logging_level_show(struct device *cdev, struct device_attribute *attr,
2809         char *buf)
2810 {
2811         struct Scsi_Host *shost = class_to_shost(cdev);
2812         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2813
2814         return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
2815 }
2816 static ssize_t
2817 _ctl_logging_level_store(struct device *cdev, struct device_attribute *attr,
2818         const char *buf, size_t count)
2819 {
2820         struct Scsi_Host *shost = class_to_shost(cdev);
2821         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2822         int val = 0;
2823
2824         if (sscanf(buf, "%x", &val) != 1)
2825                 return -EINVAL;
2826
2827         ioc->logging_level = val;
2828         pr_info(MPT3SAS_FMT "logging_level=%08xh\n", ioc->name,
2829             ioc->logging_level);
2830         return strlen(buf);
2831 }
2832 static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR, _ctl_logging_level_show,
2833         _ctl_logging_level_store);
2834
2835 /**
2836  * _ctl_fwfault_debug_show - show/store fwfault_debug
2837  * @cdev - pointer to embedded class device
2838  * @buf - the buffer returned
2839  *
2840  * mpt3sas_fwfault_debug is command line option
2841  * A sysfs 'read/write' shost attribute.
2842  */
2843 static ssize_t
2844 _ctl_fwfault_debug_show(struct device *cdev, struct device_attribute *attr,
2845         char *buf)
2846 {
2847         struct Scsi_Host *shost = class_to_shost(cdev);
2848         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2849
2850         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
2851 }
2852 static ssize_t
2853 _ctl_fwfault_debug_store(struct device *cdev, struct device_attribute *attr,
2854         const char *buf, size_t count)
2855 {
2856         struct Scsi_Host *shost = class_to_shost(cdev);
2857         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2858         int val = 0;
2859
2860         if (sscanf(buf, "%d", &val) != 1)
2861                 return -EINVAL;
2862
2863         ioc->fwfault_debug = val;
2864         pr_info(MPT3SAS_FMT "fwfault_debug=%d\n", ioc->name,
2865             ioc->fwfault_debug);
2866         return strlen(buf);
2867 }
2868 static DEVICE_ATTR(fwfault_debug, S_IRUGO | S_IWUSR,
2869         _ctl_fwfault_debug_show, _ctl_fwfault_debug_store);
2870
2871 /**
2872  * _ctl_ioc_reset_count_show - ioc reset count
2873  * @cdev - pointer to embedded class device
2874  * @buf - the buffer returned
2875  *
2876  * This is firmware queue depth limit
2877  *
2878  * A sysfs 'read-only' shost attribute.
2879  */
2880 static ssize_t
2881 _ctl_ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
2882         char *buf)
2883 {
2884         struct Scsi_Host *shost = class_to_shost(cdev);
2885         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2886
2887         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->ioc_reset_count);
2888 }
2889 static DEVICE_ATTR(ioc_reset_count, S_IRUGO, _ctl_ioc_reset_count_show, NULL);
2890
2891 /**
2892  * _ctl_ioc_reply_queue_count_show - number of reply queues
2893  * @cdev - pointer to embedded class device
2894  * @buf - the buffer returned
2895  *
2896  * This is number of reply queues
2897  *
2898  * A sysfs 'read-only' shost attribute.
2899  */
2900 static ssize_t
2901 _ctl_ioc_reply_queue_count_show(struct device *cdev,
2902         struct device_attribute *attr, char *buf)
2903 {
2904         u8 reply_queue_count;
2905         struct Scsi_Host *shost = class_to_shost(cdev);
2906         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2907
2908         if ((ioc->facts.IOCCapabilities &
2909             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
2910                 reply_queue_count = ioc->reply_queue_count;
2911         else
2912                 reply_queue_count = 1;
2913
2914         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
2915 }
2916 static DEVICE_ATTR(reply_queue_count, S_IRUGO, _ctl_ioc_reply_queue_count_show,
2917         NULL);
2918
2919 /**
2920  * _ctl_BRM_status_show - Backup Rail Monitor Status
2921  * @cdev - pointer to embedded class device
2922  * @buf - the buffer returned
2923  *
2924  * This is number of reply queues
2925  *
2926  * A sysfs 'read-only' shost attribute.
2927  */
2928 static ssize_t
2929 _ctl_BRM_status_show(struct device *cdev, struct device_attribute *attr,
2930         char *buf)
2931 {
2932         struct Scsi_Host *shost = class_to_shost(cdev);
2933         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2934         Mpi2IOUnitPage3_t *io_unit_pg3 = NULL;
2935         Mpi2ConfigReply_t mpi_reply;
2936         u16 backup_rail_monitor_status = 0;
2937         u16 ioc_status;
2938         int sz;
2939         ssize_t rc = 0;
2940
2941         if (!ioc->is_warpdrive) {
2942                 pr_err(MPT3SAS_FMT "%s: BRM attribute is only for"
2943                     " warpdrive\n", ioc->name, __func__);
2944                 goto out;
2945         }
2946         /* pci_access_mutex lock acquired by sysfs show path */
2947         mutex_lock(&ioc->pci_access_mutex);
2948         if (ioc->pci_error_recovery || ioc->remove_host) {
2949                 mutex_unlock(&ioc->pci_access_mutex);
2950                 return 0;
2951         }
2952
2953         /* allocate upto GPIOVal 36 entries */
2954         sz = offsetof(Mpi2IOUnitPage3_t, GPIOVal) + (sizeof(u16) * 36);
2955         io_unit_pg3 = kzalloc(sz, GFP_KERNEL);
2956         if (!io_unit_pg3) {
2957                 pr_err(MPT3SAS_FMT "%s: failed allocating memory "
2958                     "for iounit_pg3: (%d) bytes\n", ioc->name, __func__, sz);
2959                 goto out;
2960         }
2961
2962         if (mpt3sas_config_get_iounit_pg3(ioc, &mpi_reply, io_unit_pg3, sz) !=
2963             0) {
2964                 pr_err(MPT3SAS_FMT
2965                     "%s: failed reading iounit_pg3\n", ioc->name,
2966                     __func__);
2967                 goto out;
2968         }
2969
2970         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
2971         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
2972                 pr_err(MPT3SAS_FMT "%s: iounit_pg3 failed with "
2973                     "ioc_status(0x%04x)\n", ioc->name, __func__, ioc_status);
2974                 goto out;
2975         }
2976
2977         if (io_unit_pg3->GPIOCount < 25) {
2978                 pr_err(MPT3SAS_FMT "%s: iounit_pg3->GPIOCount less than "
2979                      "25 entries, detected (%d) entries\n", ioc->name, __func__,
2980                     io_unit_pg3->GPIOCount);
2981                 goto out;
2982         }
2983
2984         /* BRM status is in bit zero of GPIOVal[24] */
2985         backup_rail_monitor_status = le16_to_cpu(io_unit_pg3->GPIOVal[24]);
2986         rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
2987
2988  out:
2989         kfree(io_unit_pg3);
2990         mutex_unlock(&ioc->pci_access_mutex);
2991         return rc;
2992 }
2993 static DEVICE_ATTR(BRM_status, S_IRUGO, _ctl_BRM_status_show, NULL);
2994
2995 struct DIAG_BUFFER_START {
2996         __le32  Size;
2997         __le32  DiagVersion;
2998         u8      BufferType;
2999         u8      Reserved[3];
3000         __le32  Reserved1;
3001         __le32  Reserved2;
3002         __le32  Reserved3;
3003 };
3004
3005 /**
3006  * _ctl_host_trace_buffer_size_show - host buffer size (trace only)
3007  * @cdev - pointer to embedded class device
3008  * @buf - the buffer returned
3009  *
3010  * A sysfs 'read-only' shost attribute.
3011  */
3012 static ssize_t
3013 _ctl_host_trace_buffer_size_show(struct device *cdev,
3014         struct device_attribute *attr, char *buf)
3015 {
3016         struct Scsi_Host *shost = class_to_shost(cdev);
3017         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3018         u32 size = 0;
3019         struct DIAG_BUFFER_START *request_data;
3020
3021         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3022                 pr_err(MPT3SAS_FMT
3023                         "%s: host_trace_buffer is not registered\n",
3024                         ioc->name, __func__);
3025                 return 0;
3026         }
3027
3028         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3029             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3030                 pr_err(MPT3SAS_FMT
3031                         "%s: host_trace_buffer is not registered\n",
3032                         ioc->name, __func__);
3033                 return 0;
3034         }
3035
3036         request_data = (struct DIAG_BUFFER_START *)
3037             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
3038         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
3039             le32_to_cpu(request_data->DiagVersion) == 0x01000000 ||
3040             le32_to_cpu(request_data->DiagVersion) == 0x01010000) &&
3041             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
3042                 size = le32_to_cpu(request_data->Size);
3043
3044         ioc->ring_buffer_sz = size;
3045         return snprintf(buf, PAGE_SIZE, "%d\n", size);
3046 }
3047 static DEVICE_ATTR(host_trace_buffer_size, S_IRUGO,
3048         _ctl_host_trace_buffer_size_show, NULL);
3049
3050 /**
3051  * _ctl_host_trace_buffer_show - firmware ring buffer (trace only)
3052  * @cdev - pointer to embedded class device
3053  * @buf - the buffer returned
3054  *
3055  * A sysfs 'read/write' shost attribute.
3056  *
3057  * You will only be able to read 4k bytes of ring buffer at a time.
3058  * In order to read beyond 4k bytes, you will have to write out the
3059  * offset to the same attribute, it will move the pointer.
3060  */
3061 static ssize_t
3062 _ctl_host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
3063         char *buf)
3064 {
3065         struct Scsi_Host *shost = class_to_shost(cdev);
3066         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3067         void *request_data;
3068         u32 size;
3069
3070         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3071                 pr_err(MPT3SAS_FMT
3072                         "%s: host_trace_buffer is not registered\n",
3073                         ioc->name, __func__);
3074                 return 0;
3075         }
3076
3077         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3078             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3079                 pr_err(MPT3SAS_FMT
3080                         "%s: host_trace_buffer is not registered\n",
3081                         ioc->name, __func__);
3082                 return 0;
3083         }
3084
3085         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
3086                 return 0;
3087
3088         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
3089         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
3090         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
3091         memcpy(buf, request_data, size);
3092         return size;
3093 }
3094
3095 static ssize_t
3096 _ctl_host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
3097         const char *buf, size_t count)
3098 {
3099         struct Scsi_Host *shost = class_to_shost(cdev);
3100         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3101         int val = 0;
3102
3103         if (sscanf(buf, "%d", &val) != 1)
3104                 return -EINVAL;
3105
3106         ioc->ring_buffer_offset = val;
3107         return strlen(buf);
3108 }
3109 static DEVICE_ATTR(host_trace_buffer, S_IRUGO | S_IWUSR,
3110         _ctl_host_trace_buffer_show, _ctl_host_trace_buffer_store);
3111
3112
3113 /*****************************************/
3114
3115 /**
3116  * _ctl_host_trace_buffer_enable_show - firmware ring buffer (trace only)
3117  * @cdev - pointer to embedded class device
3118  * @buf - the buffer returned
3119  *
3120  * A sysfs 'read/write' shost attribute.
3121  *
3122  * This is a mechnism to post/release host_trace_buffers
3123  */
3124 static ssize_t
3125 _ctl_host_trace_buffer_enable_show(struct device *cdev,
3126         struct device_attribute *attr, char *buf)
3127 {
3128         struct Scsi_Host *shost = class_to_shost(cdev);
3129         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3130
3131         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
3132            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3133             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0))
3134                 return snprintf(buf, PAGE_SIZE, "off\n");
3135         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3136             MPT3_DIAG_BUFFER_IS_RELEASED))
3137                 return snprintf(buf, PAGE_SIZE, "release\n");
3138         else
3139                 return snprintf(buf, PAGE_SIZE, "post\n");
3140 }
3141
3142 static ssize_t
3143 _ctl_host_trace_buffer_enable_store(struct device *cdev,
3144         struct device_attribute *attr, const char *buf, size_t count)
3145 {
3146         struct Scsi_Host *shost = class_to_shost(cdev);
3147         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3148         char str[10] = "";
3149         struct mpt3_diag_register diag_register;
3150         u8 issue_reset = 0;
3151
3152         /* don't allow post/release occurr while recovery is active */
3153         if (ioc->shost_recovery || ioc->remove_host ||
3154             ioc->pci_error_recovery || ioc->is_driver_loading)
3155                 return -EBUSY;
3156
3157         if (sscanf(buf, "%9s", str) != 1)
3158                 return -EINVAL;
3159
3160         if (!strcmp(str, "post")) {
3161                 /* exit out if host buffers are already posted */
3162                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
3163                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3164                     MPT3_DIAG_BUFFER_IS_REGISTERED) &&
3165                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3166                     MPT3_DIAG_BUFFER_IS_RELEASED) == 0))
3167                         goto out;
3168                 memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
3169                 pr_info(MPT3SAS_FMT "posting host trace buffers\n",
3170                     ioc->name);
3171                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
3172                 diag_register.requested_buffer_size = (1024 * 1024);
3173                 diag_register.unique_id = 0x7075900;
3174                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
3175                 _ctl_diag_register_2(ioc,  &diag_register);
3176         } else if (!strcmp(str, "release")) {
3177                 /* exit out if host buffers are already released */
3178                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
3179                         goto out;
3180                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3181                     MPT3_DIAG_BUFFER_IS_REGISTERED) == 0)
3182                         goto out;
3183                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3184                     MPT3_DIAG_BUFFER_IS_RELEASED))
3185                         goto out;
3186                 pr_info(MPT3SAS_FMT "releasing host trace buffer\n",
3187                     ioc->name);
3188                 mpt3sas_send_diag_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE,
3189                     &issue_reset);
3190         }
3191
3192  out:
3193         return strlen(buf);
3194 }
3195 static DEVICE_ATTR(host_trace_buffer_enable, S_IRUGO | S_IWUSR,
3196         _ctl_host_trace_buffer_enable_show,
3197         _ctl_host_trace_buffer_enable_store);
3198
3199 /*********** diagnostic trigger suppport *********************************/
3200
3201 /**
3202  * _ctl_diag_trigger_master_show - show the diag_trigger_master attribute
3203  * @cdev - pointer to embedded class device
3204  * @buf - the buffer returned
3205  *
3206  * A sysfs 'read/write' shost attribute.
3207  */
3208 static ssize_t
3209 _ctl_diag_trigger_master_show(struct device *cdev,
3210         struct device_attribute *attr, char *buf)
3211
3212 {
3213         struct Scsi_Host *shost = class_to_shost(cdev);
3214         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3215         unsigned long flags;
3216         ssize_t rc;
3217
3218         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3219         rc = sizeof(struct SL_WH_MASTER_TRIGGER_T);
3220         memcpy(buf, &ioc->diag_trigger_master, rc);
3221         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3222         return rc;
3223 }
3224
3225 /**
3226  * _ctl_diag_trigger_master_store - store the diag_trigger_master attribute
3227  * @cdev - pointer to embedded class device
3228  * @buf - the buffer returned
3229  *
3230  * A sysfs 'read/write' shost attribute.
3231  */
3232 static ssize_t
3233 _ctl_diag_trigger_master_store(struct device *cdev,
3234         struct device_attribute *attr, const char *buf, size_t count)
3235
3236 {
3237         struct Scsi_Host *shost = class_to_shost(cdev);
3238         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3239         unsigned long flags;
3240         ssize_t rc;
3241
3242         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3243         rc = min(sizeof(struct SL_WH_MASTER_TRIGGER_T), count);
3244         memset(&ioc->diag_trigger_master, 0,
3245             sizeof(struct SL_WH_MASTER_TRIGGER_T));
3246         memcpy(&ioc->diag_trigger_master, buf, rc);
3247         ioc->diag_trigger_master.MasterData |=
3248             (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
3249         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3250         return rc;
3251 }
3252 static DEVICE_ATTR(diag_trigger_master, S_IRUGO | S_IWUSR,
3253         _ctl_diag_trigger_master_show, _ctl_diag_trigger_master_store);
3254
3255
3256 /**
3257  * _ctl_diag_trigger_event_show - show the diag_trigger_event attribute
3258  * @cdev - pointer to embedded class device
3259  * @buf - the buffer returned
3260  *
3261  * A sysfs 'read/write' shost attribute.
3262  */
3263 static ssize_t
3264 _ctl_diag_trigger_event_show(struct device *cdev,
3265         struct device_attribute *attr, char *buf)
3266 {
3267         struct Scsi_Host *shost = class_to_shost(cdev);
3268         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3269         unsigned long flags;
3270         ssize_t rc;
3271
3272         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3273         rc = sizeof(struct SL_WH_EVENT_TRIGGERS_T);
3274         memcpy(buf, &ioc->diag_trigger_event, rc);
3275         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3276         return rc;
3277 }
3278
3279 /**
3280  * _ctl_diag_trigger_event_store - store the diag_trigger_event attribute
3281  * @cdev - pointer to embedded class device
3282  * @buf - the buffer returned
3283  *
3284  * A sysfs 'read/write' shost attribute.
3285  */
3286 static ssize_t
3287 _ctl_diag_trigger_event_store(struct device *cdev,
3288         struct device_attribute *attr, const char *buf, size_t count)
3289
3290 {
3291         struct Scsi_Host *shost = class_to_shost(cdev);
3292         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3293         unsigned long flags;
3294         ssize_t sz;
3295
3296         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3297         sz = min(sizeof(struct SL_WH_EVENT_TRIGGERS_T), count);
3298         memset(&ioc->diag_trigger_event, 0,
3299             sizeof(struct SL_WH_EVENT_TRIGGERS_T));
3300         memcpy(&ioc->diag_trigger_event, buf, sz);
3301         if (ioc->diag_trigger_event.ValidEntries > NUM_VALID_ENTRIES)
3302                 ioc->diag_trigger_event.ValidEntries = NUM_VALID_ENTRIES;
3303         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3304         return sz;
3305 }
3306 static DEVICE_ATTR(diag_trigger_event, S_IRUGO | S_IWUSR,
3307         _ctl_diag_trigger_event_show, _ctl_diag_trigger_event_store);
3308
3309
3310 /**
3311  * _ctl_diag_trigger_scsi_show - show the diag_trigger_scsi attribute
3312  * @cdev - pointer to embedded class device
3313  * @buf - the buffer returned
3314  *
3315  * A sysfs 'read/write' shost attribute.
3316  */
3317 static ssize_t
3318 _ctl_diag_trigger_scsi_show(struct device *cdev,
3319         struct device_attribute *attr, char *buf)
3320 {
3321         struct Scsi_Host *shost = class_to_shost(cdev);
3322         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3323         unsigned long flags;
3324         ssize_t rc;
3325
3326         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3327         rc = sizeof(struct SL_WH_SCSI_TRIGGERS_T);
3328         memcpy(buf, &ioc->diag_trigger_scsi, rc);
3329         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3330         return rc;
3331 }
3332
3333 /**
3334  * _ctl_diag_trigger_scsi_store - store the diag_trigger_scsi attribute
3335  * @cdev - pointer to embedded class device
3336  * @buf - the buffer returned
3337  *
3338  * A sysfs 'read/write' shost attribute.
3339  */
3340 static ssize_t
3341 _ctl_diag_trigger_scsi_store(struct device *cdev,
3342         struct device_attribute *attr, const char *buf, size_t count)
3343 {
3344         struct Scsi_Host *shost = class_to_shost(cdev);
3345         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3346         unsigned long flags;
3347         ssize_t sz;
3348
3349         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3350         sz = min(sizeof(struct SL_WH_SCSI_TRIGGERS_T), count);
3351         memset(&ioc->diag_trigger_scsi, 0,
3352             sizeof(struct SL_WH_EVENT_TRIGGERS_T));
3353         memcpy(&ioc->diag_trigger_scsi, buf, sz);
3354         if (ioc->diag_trigger_scsi.ValidEntries > NUM_VALID_ENTRIES)
3355                 ioc->diag_trigger_scsi.ValidEntries = NUM_VALID_ENTRIES;
3356         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3357         return sz;
3358 }
3359 static DEVICE_ATTR(diag_trigger_scsi, S_IRUGO | S_IWUSR,
3360         _ctl_diag_trigger_scsi_show, _ctl_diag_trigger_scsi_store);
3361
3362
3363 /**
3364  * _ctl_diag_trigger_scsi_show - show the diag_trigger_mpi attribute
3365  * @cdev - pointer to embedded class device
3366  * @buf - the buffer returned
3367  *
3368  * A sysfs 'read/write' shost attribute.
3369  */
3370 static ssize_t
3371 _ctl_diag_trigger_mpi_show(struct device *cdev,
3372         struct device_attribute *attr, char *buf)
3373 {
3374         struct Scsi_Host *shost = class_to_shost(cdev);
3375         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3376         unsigned long flags;
3377         ssize_t rc;
3378
3379         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3380         rc = sizeof(struct SL_WH_MPI_TRIGGERS_T);
3381         memcpy(buf, &ioc->diag_trigger_mpi, rc);
3382         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3383         return rc;
3384 }
3385
3386 /**
3387  * _ctl_diag_trigger_mpi_store - store the diag_trigger_mpi attribute
3388  * @cdev - pointer to embedded class device
3389  * @buf - the buffer returned
3390  *
3391  * A sysfs 'read/write' shost attribute.
3392  */
3393 static ssize_t
3394 _ctl_diag_trigger_mpi_store(struct device *cdev,
3395         struct device_attribute *attr, const char *buf, size_t count)
3396 {
3397         struct Scsi_Host *shost = class_to_shost(cdev);
3398         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3399         unsigned long flags;
3400         ssize_t sz;
3401
3402         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3403         sz = min(sizeof(struct SL_WH_MPI_TRIGGERS_T), count);
3404         memset(&ioc->diag_trigger_mpi, 0,
3405             sizeof(ioc->diag_trigger_mpi));
3406         memcpy(&ioc->diag_trigger_mpi, buf, sz);
3407         if (ioc->diag_trigger_mpi.ValidEntries > NUM_VALID_ENTRIES)
3408                 ioc->diag_trigger_mpi.ValidEntries = NUM_VALID_ENTRIES;
3409         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3410         return sz;
3411 }
3412
3413 static DEVICE_ATTR(diag_trigger_mpi, S_IRUGO | S_IWUSR,
3414         _ctl_diag_trigger_mpi_show, _ctl_diag_trigger_mpi_store);
3415
3416 /*********** diagnostic trigger suppport *** END ****************************/
3417
3418 /*****************************************/
3419
3420 struct device_attribute *mpt3sas_host_attrs[] = {
3421         &dev_attr_version_fw,
3422         &dev_attr_version_bios,
3423         &dev_attr_version_mpi,
3424         &dev_attr_version_product,
3425         &dev_attr_version_nvdata_persistent,
3426         &dev_attr_version_nvdata_default,
3427         &dev_attr_board_name,
3428         &dev_attr_board_assembly,
3429         &dev_attr_board_tracer,
3430         &dev_attr_io_delay,
3431         &dev_attr_device_delay,
3432         &dev_attr_logging_level,
3433         &dev_attr_fwfault_debug,
3434         &dev_attr_fw_queue_depth,
3435         &dev_attr_host_sas_address,
3436         &dev_attr_ioc_reset_count,
3437         &dev_attr_host_trace_buffer_size,
3438         &dev_attr_host_trace_buffer,
3439         &dev_attr_host_trace_buffer_enable,
3440         &dev_attr_reply_queue_count,
3441         &dev_attr_diag_trigger_master,
3442         &dev_attr_diag_trigger_event,
3443         &dev_attr_diag_trigger_scsi,
3444         &dev_attr_diag_trigger_mpi,
3445         &dev_attr_BRM_status,
3446         NULL,
3447 };
3448
3449 /* device attributes */
3450
3451 /**
3452  * _ctl_device_sas_address_show - sas address
3453  * @cdev - pointer to embedded class device
3454  * @buf - the buffer returned
3455  *
3456  * This is the sas address for the target
3457  *
3458  * A sysfs 'read-only' shost attribute.
3459  */
3460 static ssize_t
3461 _ctl_device_sas_address_show(struct device *dev, struct device_attribute *attr,
3462         char *buf)
3463 {
3464         struct scsi_device *sdev = to_scsi_device(dev);
3465         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3466
3467         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3468             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
3469 }
3470 static DEVICE_ATTR(sas_address, S_IRUGO, _ctl_device_sas_address_show, NULL);
3471
3472 /**
3473  * _ctl_device_handle_show - device handle
3474  * @cdev - pointer to embedded class device
3475  * @buf - the buffer returned
3476  *
3477  * This is the firmware assigned device handle
3478  *
3479  * A sysfs 'read-only' shost attribute.
3480  */
3481 static ssize_t
3482 _ctl_device_handle_show(struct device *dev, struct device_attribute *attr,
3483         char *buf)
3484 {
3485         struct scsi_device *sdev = to_scsi_device(dev);
3486         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3487
3488         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
3489             sas_device_priv_data->sas_target->handle);
3490 }
3491 static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL);
3492
3493 /**
3494  * _ctl_device_ncq_io_prio_show - send prioritized io commands to device
3495  * @dev - pointer to embedded device
3496  * @buf - the buffer returned
3497  *
3498  * A sysfs 'read/write' sdev attribute, only works with SATA
3499  */
3500 static ssize_t
3501 _ctl_device_ncq_prio_enable_show(struct device *dev,
3502                                  struct device_attribute *attr, char *buf)
3503 {
3504         struct scsi_device *sdev = to_scsi_device(dev);
3505         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3506
3507         return snprintf(buf, PAGE_SIZE, "%d\n",
3508                         sas_device_priv_data->ncq_prio_enable);
3509 }
3510
3511 static ssize_t
3512 _ctl_device_ncq_prio_enable_store(struct device *dev,
3513                                   struct device_attribute *attr,
3514                                   const char *buf, size_t count)
3515 {
3516         struct scsi_device *sdev = to_scsi_device(dev);
3517         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3518         bool ncq_prio_enable = 0;
3519
3520         if (kstrtobool(buf, &ncq_prio_enable))
3521                 return -EINVAL;
3522
3523         if (!scsih_ncq_prio_supp(sdev))
3524                 return -EINVAL;
3525
3526         sas_device_priv_data->ncq_prio_enable = ncq_prio_enable;
3527         return strlen(buf);
3528 }
3529 static DEVICE_ATTR(sas_ncq_prio_enable, S_IRUGO | S_IWUSR,
3530                    _ctl_device_ncq_prio_enable_show,
3531                    _ctl_device_ncq_prio_enable_store);
3532
3533 struct device_attribute *mpt3sas_dev_attrs[] = {
3534         &dev_attr_sas_address,
3535         &dev_attr_sas_device_handle,
3536         &dev_attr_sas_ncq_prio_enable,
3537         NULL,
3538 };
3539
3540 /* file operations table for mpt3ctl device */
3541 static const struct file_operations ctl_fops = {
3542         .owner = THIS_MODULE,
3543         .unlocked_ioctl = _ctl_ioctl,
3544         .poll = _ctl_poll,
3545         .fasync = _ctl_fasync,
3546 #ifdef CONFIG_COMPAT
3547         .compat_ioctl = _ctl_ioctl_compat,
3548 #endif
3549 };
3550
3551 /* file operations table for mpt2ctl device */
3552 static const struct file_operations ctl_gen2_fops = {
3553         .owner = THIS_MODULE,
3554         .unlocked_ioctl = _ctl_mpt2_ioctl,
3555         .poll = _ctl_poll,
3556         .fasync = _ctl_fasync,
3557 #ifdef CONFIG_COMPAT
3558         .compat_ioctl = _ctl_mpt2_ioctl_compat,
3559 #endif
3560 };
3561
3562 static struct miscdevice ctl_dev = {
3563         .minor  = MPT3SAS_MINOR,
3564         .name   = MPT3SAS_DEV_NAME,
3565         .fops   = &ctl_fops,
3566 };
3567
3568 static struct miscdevice gen2_ctl_dev = {
3569         .minor  = MPT2SAS_MINOR,
3570         .name   = MPT2SAS_DEV_NAME,
3571         .fops   = &ctl_gen2_fops,
3572 };
3573
3574 /**
3575  * mpt3sas_ctl_init - main entry point for ctl.
3576  *
3577  */
3578 void
3579 mpt3sas_ctl_init(ushort hbas_to_enumerate)
3580 {
3581         async_queue = NULL;
3582
3583         /* Don't register mpt3ctl ioctl device if
3584          * hbas_to_enumarate is one.
3585          */
3586         if (hbas_to_enumerate != 1)
3587                 if (misc_register(&ctl_dev) < 0)
3588                         pr_err("%s can't register misc device [minor=%d]\n",
3589                             MPT3SAS_DRIVER_NAME, MPT3SAS_MINOR);
3590
3591         /* Don't register mpt3ctl ioctl device if
3592          * hbas_to_enumarate is two.
3593          */
3594         if (hbas_to_enumerate != 2)
3595                 if (misc_register(&gen2_ctl_dev) < 0)
3596                         pr_err("%s can't register misc device [minor=%d]\n",
3597                             MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
3598
3599         init_waitqueue_head(&ctl_poll_wait);
3600 }
3601
3602 /**
3603  * mpt3sas_ctl_exit - exit point for ctl
3604  *
3605  */
3606 void
3607 mpt3sas_ctl_exit(ushort hbas_to_enumerate)
3608 {
3609         struct MPT3SAS_ADAPTER *ioc;
3610         int i;
3611
3612         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
3613
3614                 /* free memory associated to diag buffers */
3615                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
3616                         if (!ioc->diag_buffer[i])
3617                                 continue;
3618                         if (!(ioc->diag_buffer_status[i] &
3619                             MPT3_DIAG_BUFFER_IS_REGISTERED))
3620                                 continue;
3621                         if ((ioc->diag_buffer_status[i] &
3622                             MPT3_DIAG_BUFFER_IS_RELEASED))
3623                                 continue;
3624                         pci_free_consistent(ioc->pdev, ioc->diag_buffer_sz[i],
3625                         ioc->diag_buffer[i], ioc->diag_buffer_dma[i]);
3626                         ioc->diag_buffer[i] = NULL;
3627                         ioc->diag_buffer_status[i] = 0;
3628                 }
3629
3630                 kfree(ioc->event_log);
3631         }
3632         if (hbas_to_enumerate != 1)
3633                 misc_deregister(&ctl_dev);
3634         if (hbas_to_enumerate != 2)
3635                 misc_deregister(&gen2_ctl_dev);
3636 }