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: MPT-FusionLinux.pdl@avagotech.com)
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * NO WARRANTY
  21  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  22  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  23  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  24  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  25  * solely responsible for determining the appropriateness of using and
  26  * distributing the Program and assumes all risks associated with its
  27  * exercise of rights under this Agreement, including but not limited to
  28  * the risks and costs of program errors, damage to or loss of data,
  29  * programs or equipment, and unavailability or interruption of operations.
  30
  31  * DISCLAIMER OF LIABILITY
  32  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  33  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  35  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  36  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  37  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  38  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  39
  40  * You should have received a copy of the GNU General Public License
  41  * along with this program; if not, write to the Free Software
  42  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  43  * USA.
  44  */
  45
  46 #include <linux/kernel.h>
  47 #include <linux/module.h>
  48 #include <linux/errno.h>
  49 #include <linux/init.h>
  50 #include <linux/slab.h>
  51 #include <linux/types.h>
  52 #include <linux/pci.h>
  53 #include <linux/delay.h>
  54 #include <linux/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         case MPI2_FUNCTION_TOOLBOX:
 184                 desc = "toolbox";
 185                 break;
 186         case MPI2_FUNCTION_NVME_ENCAPSULATED:
 187                 desc = "nvme_encapsulated";
 188                 break;
 189         }
 190
 191         if (!desc)
 192                 return;
 193
 194         ioc_info(ioc, "%s: %s, smid(%d)\n", calling_function_name, desc, smid);
 195
 196         if (!mpi_reply)
 197                 return;
 198
 199         if (mpi_reply->IOCStatus || mpi_reply->IOCLogInfo)
 200                 ioc_info(ioc, "\tiocstatus(0x%04x), loginfo(0x%08x)\n",
 201                          le16_to_cpu(mpi_reply->IOCStatus),
 202                          le32_to_cpu(mpi_reply->IOCLogInfo));
 203
 204         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 205             mpi_request->Function ==
 206             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 207                 Mpi2SCSIIOReply_t *scsi_reply =
 208                     (Mpi2SCSIIOReply_t *)mpi_reply;
 209                 struct _sas_device *sas_device = NULL;
 210                 struct _pcie_device *pcie_device = NULL;
 211
 212                 sas_device = mpt3sas_get_sdev_by_handle(ioc,
 213                     le16_to_cpu(scsi_reply->DevHandle));
 214                 if (sas_device) {
 215                         ioc_warn(ioc, "\tsas_address(0x%016llx), phy(%d)\n",
 216                                  (u64)sas_device->sas_address,
 217                                  sas_device->phy);
 218                         ioc_warn(ioc, "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 219                                  (u64)sas_device->enclosure_logical_id,
 220                                  sas_device->slot);
 221                         sas_device_put(sas_device);
 222                 }
 223                 if (!sas_device) {
 224                         pcie_device = mpt3sas_get_pdev_by_handle(ioc,
 225                                 le16_to_cpu(scsi_reply->DevHandle));
 226                         if (pcie_device) {
 227                                 ioc_warn(ioc, "\tWWID(0x%016llx), port(%d)\n",
 228                                          (unsigned long long)pcie_device->wwid,
 229                                          pcie_device->port_num);
 230                                 if (pcie_device->enclosure_handle != 0)
 231                                         ioc_warn(ioc, "\tenclosure_logical_id(0x%016llx), slot(%d)\n",
 232                                                  (u64)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                         ioc_info(ioc, "\tscsi_state(0x%02x), scsi_status(0x%02x)\n",
 239                                  scsi_reply->SCSIState,
 240                                  scsi_reply->SCSIStatus);
 241         }
 242 }
 243
 244 /**
 245  * mpt3sas_ctl_done - ctl module completion routine
 246  * @ioc: per adapter object
 247  * @smid: system request message index
 248  * @msix_index: MSIX table index supplied by the OS
 249  * @reply: reply message frame(lower 32bit addr)
 250  * Context: none.
 251  *
 252  * The callback handler when using ioc->ctl_cb_idx.
 253  *
 254  * Return: 1 meaning mf should be freed from _base_interrupt
 255  *         0 means the mf is freed from this function.
 256  */
 257 u8
 258 mpt3sas_ctl_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 259         u32 reply)
 260 {
 261         MPI2DefaultReply_t *mpi_reply;
 262         Mpi2SCSIIOReply_t *scsiio_reply;
 263         Mpi26NVMeEncapsulatedErrorReply_t *nvme_error_reply;
 264         const void *sense_data;
 265         u32 sz;
 266
 267         if (ioc->ctl_cmds.status == MPT3_CMD_NOT_USED)
 268                 return 1;
 269         if (ioc->ctl_cmds.smid != smid)
 270                 return 1;
 271         ioc->ctl_cmds.status |= MPT3_CMD_COMPLETE;
 272         mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
 273         if (mpi_reply) {
 274                 memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 275                 ioc->ctl_cmds.status |= MPT3_CMD_REPLY_VALID;
 276                 /* get sense data */
 277                 if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 278                     mpi_reply->Function ==
 279                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 280                         scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply;
 281                         if (scsiio_reply->SCSIState &
 282                             MPI2_SCSI_STATE_AUTOSENSE_VALID) {
 283                                 sz = min_t(u32, SCSI_SENSE_BUFFERSIZE,
 284                                     le32_to_cpu(scsiio_reply->SenseCount));
 285                                 sense_data = mpt3sas_base_get_sense_buffer(ioc,
 286                                     smid);
 287                                 memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 288                         }
 289                 }
 290                 /*
 291                  * Get Error Response data for NVMe device. The ctl_cmds.sense
 292                  * buffer is used to store the Error Response data.
 293                  */
 294                 if (mpi_reply->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
 295                         nvme_error_reply =
 296                             (Mpi26NVMeEncapsulatedErrorReply_t *)mpi_reply;
 297                         sz = min_t(u32, NVME_ERROR_RESPONSE_SIZE,
 298                             le16_to_cpu(nvme_error_reply->ErrorResponseCount));
 299                         sense_data = mpt3sas_base_get_sense_buffer(ioc, smid);
 300                         memcpy(ioc->ctl_cmds.sense, sense_data, sz);
 301                 }
 302         }
 303
 304         _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply);
 305         ioc->ctl_cmds.status &= ~MPT3_CMD_PENDING;
 306         complete(&ioc->ctl_cmds.done);
 307         return 1;
 308 }
 309
 310 /**
 311  * _ctl_check_event_type - determines when an event needs logging
 312  * @ioc: per adapter object
 313  * @event: firmware event
 314  *
 315  * The bitmask in ioc->event_type[] indicates which events should be
 316  * be saved in the driver event_log.  This bitmask is set by application.
 317  *
 318  * Return: 1 when event should be captured, or zero means no match.
 319  */
 320 static int
 321 _ctl_check_event_type(struct MPT3SAS_ADAPTER *ioc, u16 event)
 322 {
 323         u16 i;
 324         u32 desired_event;
 325
 326         if (event >= 128 || !event || !ioc->event_log)
 327                 return 0;
 328
 329         desired_event = (1 << (event % 32));
 330         if (!desired_event)
 331                 desired_event = 1;
 332         i = event / 32;
 333         return desired_event & ioc->event_type[i];
 334 }
 335
 336 /**
 337  * mpt3sas_ctl_add_to_event_log - add event
 338  * @ioc: per adapter object
 339  * @mpi_reply: reply message frame
 340  */
 341 void
 342 mpt3sas_ctl_add_to_event_log(struct MPT3SAS_ADAPTER *ioc,
 343         Mpi2EventNotificationReply_t *mpi_reply)
 344 {
 345         struct MPT3_IOCTL_EVENTS *event_log;
 346         u16 event;
 347         int i;
 348         u32 sz, event_data_sz;
 349         u8 send_aen = 0;
 350
 351         if (!ioc->event_log)
 352                 return;
 353
 354         event = le16_to_cpu(mpi_reply->Event);
 355
 356         if (_ctl_check_event_type(ioc, event)) {
 357
 358                 /* insert entry into circular event_log */
 359                 i = ioc->event_context % MPT3SAS_CTL_EVENT_LOG_SIZE;
 360                 event_log = ioc->event_log;
 361                 event_log[i].event = event;
 362                 event_log[i].context = ioc->event_context++;
 363
 364                 event_data_sz = le16_to_cpu(mpi_reply->EventDataLength)*4;
 365                 sz = min_t(u32, event_data_sz, MPT3_EVENT_DATA_SIZE);
 366                 memset(event_log[i].data, 0, MPT3_EVENT_DATA_SIZE);
 367                 memcpy(event_log[i].data, mpi_reply->EventData, sz);
 368                 send_aen = 1;
 369         }
 370
 371         /* This aen_event_read_flag flag is set until the
 372          * application has read the event log.
 373          * For MPI2_EVENT_LOG_ENTRY_ADDED, we always notify.
 374          */
 375         if (event == MPI2_EVENT_LOG_ENTRY_ADDED ||
 376             (send_aen && !ioc->aen_event_read_flag)) {
 377                 ioc->aen_event_read_flag = 1;
 378                 wake_up_interruptible(&ctl_poll_wait);
 379                 if (async_queue)
 380                         kill_fasync(&async_queue, SIGIO, POLL_IN);
 381         }
 382 }
 383
 384 /**
 385  * mpt3sas_ctl_event_callback - firmware event handler (called at ISR time)
 386  * @ioc: per adapter object
 387  * @msix_index: MSIX table index supplied by the OS
 388  * @reply: reply message frame(lower 32bit addr)
 389  * Context: interrupt.
 390  *
 391  * This function merely adds a new work task into ioc->firmware_event_thread.
 392  * The tasks are worked from _firmware_event_work in user context.
 393  *
 394  * Return: 1 meaning mf should be freed from _base_interrupt
 395  *         0 means the mf is freed from this function.
 396  */
 397 u8
 398 mpt3sas_ctl_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index,
 399         u32 reply)
 400 {
 401         Mpi2EventNotificationReply_t *mpi_reply;
 402
 403         mpi_reply = mpt3sas_base_get_reply_virt_addr(ioc, reply);
 404         if (mpi_reply)
 405                 mpt3sas_ctl_add_to_event_log(ioc, mpi_reply);
 406         return 1;
 407 }
 408
 409 /**
 410  * _ctl_verify_adapter - validates ioc_number passed from application
 411  * @ioc_number: ?
 412  * @iocpp: The ioc pointer is returned in this.
 413  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
 414  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
 415  *
 416  * Return: (-1) means error, else ioc_number.
 417  */
 418 static int
 419 _ctl_verify_adapter(int ioc_number, struct MPT3SAS_ADAPTER **iocpp,
 420                                                         int mpi_version)
 421 {
 422         struct MPT3SAS_ADAPTER *ioc;
 423         int version = 0;
 424         /* global ioc lock to protect controller on list operations */
 425         spin_lock(&gioc_lock);
 426         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 427                 if (ioc->id != ioc_number)
 428                         continue;
 429                 /* Check whether this ioctl command is from right
 430                  * ioctl device or not, if not continue the search.
 431                  */
 432                 version = ioc->hba_mpi_version_belonged;
 433                 /* MPI25_VERSION and MPI26_VERSION uses same ioctl
 434                  * device.
 435                  */
 436                 if (mpi_version == (MPI25_VERSION | MPI26_VERSION)) {
 437                         if ((version == MPI25_VERSION) ||
 438                                 (version == MPI26_VERSION))
 439                                 goto out;
 440                         else
 441                                 continue;
 442                 } else {
 443                         if (version != mpi_version)
 444                                 continue;
 445                 }
 446 out:
 447                 spin_unlock(&gioc_lock);
 448                 *iocpp = ioc;
 449                 return ioc_number;
 450         }
 451         spin_unlock(&gioc_lock);
 452         *iocpp = NULL;
 453         return -1;
 454 }
 455
 456 /**
 457  * mpt3sas_ctl_pre_reset_handler - reset callback handler (for ctl)
 458  * @ioc: per adapter object
 459  *
 460  * The handler for doing any required cleanup or initialization.
 461  */
 462 void mpt3sas_ctl_pre_reset_handler(struct MPT3SAS_ADAPTER *ioc)
 463 {
 464         int i;
 465         u8 issue_reset;
 466
 467         dtmprintk(ioc, ioc_info(ioc, "%s: MPT3_IOC_PRE_RESET\n", __func__));
 468         for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 469                 if (!(ioc->diag_buffer_status[i] &
 470                       MPT3_DIAG_BUFFER_IS_REGISTERED))
 471                         continue;
 472                 if ((ioc->diag_buffer_status[i] &
 473                      MPT3_DIAG_BUFFER_IS_RELEASED))
 474                         continue;
 475
 476                 /*
 477                  * add a log message to indicate the release
 478                  */
 479                 ioc_info(ioc,
 480                     "%s: Releasing the trace buffer due to adapter reset.",
 481                     __func__);
 482                 ioc->htb_rel.buffer_rel_condition =
 483                     MPT3_DIAG_BUFFER_REL_TRIGGER;
 484                 mpt3sas_send_diag_release(ioc, i, &issue_reset);
 485         }
 486 }
 487
 488 /**
 489  * mpt3sas_ctl_clear_outstanding_ioctls - clears outstanding ioctl cmd.
 490  * @ioc: per adapter object
 491  *
 492  * The handler for doing any required cleanup or initialization.
 493  */
 494 void mpt3sas_ctl_clear_outstanding_ioctls(struct MPT3SAS_ADAPTER *ioc)
 495 {
 496         dtmprintk(ioc,
 497             ioc_info(ioc, "%s: clear outstanding ioctl cmd\n", __func__));
 498         if (ioc->ctl_cmds.status & MPT3_CMD_PENDING) {
 499                 ioc->ctl_cmds.status |= MPT3_CMD_RESET;
 500                 mpt3sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
 501                 complete(&ioc->ctl_cmds.done);
 502         }
 503 }
 504
 505 /**
 506  * mpt3sas_ctl_reset_done_handler - reset callback handler (for ctl)
 507  * @ioc: per adapter object
 508  *
 509  * The handler for doing any required cleanup or initialization.
 510  */
 511 void mpt3sas_ctl_reset_done_handler(struct MPT3SAS_ADAPTER *ioc)
 512 {
 513         int i;
 514
 515         dtmprintk(ioc, ioc_info(ioc, "%s: MPT3_IOC_DONE_RESET\n", __func__));
 516
 517         for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 518                 if (!(ioc->diag_buffer_status[i] &
 519                       MPT3_DIAG_BUFFER_IS_REGISTERED))
 520                         continue;
 521                 if ((ioc->diag_buffer_status[i] &
 522                      MPT3_DIAG_BUFFER_IS_RELEASED))
 523                         continue;
 524                 ioc->diag_buffer_status[i] |=
 525                         MPT3_DIAG_BUFFER_IS_DIAG_RESET;
 526         }
 527 }
 528
 529 /**
 530  * _ctl_fasync -
 531  * @fd: ?
 532  * @filep: ?
 533  * @mode: ?
 534  *
 535  * Called when application request fasyn callback handler.
 536  */
 537 static int
 538 _ctl_fasync(int fd, struct file *filep, int mode)
 539 {
 540         return fasync_helper(fd, filep, mode, &async_queue);
 541 }
 542
 543 /**
 544  * _ctl_poll -
 545  * @filep: ?
 546  * @wait: ?
 547  *
 548  */
 549 static __poll_t
 550 _ctl_poll(struct file *filep, poll_table *wait)
 551 {
 552         struct MPT3SAS_ADAPTER *ioc;
 553
 554         poll_wait(filep, &ctl_poll_wait, wait);
 555
 556         /* global ioc lock to protect controller on list operations */
 557         spin_lock(&gioc_lock);
 558         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 559                 if (ioc->aen_event_read_flag) {
 560                         spin_unlock(&gioc_lock);
 561                         return EPOLLIN | EPOLLRDNORM;
 562                 }
 563         }
 564         spin_unlock(&gioc_lock);
 565         return 0;
 566 }
 567
 568 /**
 569  * _ctl_set_task_mid - assign an active smid to tm request
 570  * @ioc: per adapter object
 571  * @karg: (struct mpt3_ioctl_command)
 572  * @tm_request: pointer to mf from user space
 573  *
 574  * Return: 0 when an smid if found, else fail.
 575  * during failure, the reply frame is filled.
 576  */
 577 static int
 578 _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
 579         Mpi2SCSITaskManagementRequest_t *tm_request)
 580 {
 581         bool found = false;
 582         u16 smid;
 583         u16 handle;
 584         struct scsi_cmnd *scmd;
 585         struct MPT3SAS_DEVICE *priv_data;
 586         Mpi2SCSITaskManagementReply_t *tm_reply;
 587         u32 sz;
 588         u32 lun;
 589         char *desc = NULL;
 590
 591         if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
 592                 desc = "abort_task";
 593         else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
 594                 desc = "query_task";
 595         else
 596                 return 0;
 597
 598         lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
 599
 600         handle = le16_to_cpu(tm_request->DevHandle);
 601         for (smid = ioc->scsiio_depth; smid && !found; smid--) {
 602                 struct scsiio_tracker *st;
 603                 __le16 task_mid;
 604
 605                 scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
 606                 if (!scmd)
 607                         continue;
 608                 if (lun != scmd->device->lun)
 609                         continue;
 610                 priv_data = scmd->device->hostdata;
 611                 if (priv_data->sas_target == NULL)
 612                         continue;
 613                 if (priv_data->sas_target->handle != handle)
 614                         continue;
 615                 st = scsi_cmd_priv(scmd);
 616
 617                 /*
 618                  * If the given TaskMID from the user space is zero, then the
 619                  * first outstanding smid will be picked up.  Otherwise,
 620                  * targeted smid will be the one.
 621                  */
 622                 task_mid = cpu_to_le16(st->smid);
 623                 if (!tm_request->TaskMID)
 624                         tm_request->TaskMID = task_mid;
 625                 found = tm_request->TaskMID == task_mid;
 626         }
 627
 628         if (!found) {
 629                 dctlprintk(ioc,
 630                            ioc_info(ioc, "%s: handle(0x%04x), lun(%d), no active mid!!\n",
 631                                     desc, le16_to_cpu(tm_request->DevHandle),
 632                                     lun));
 633                 tm_reply = ioc->ctl_cmds.reply;
 634                 tm_reply->DevHandle = tm_request->DevHandle;
 635                 tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 636                 tm_reply->TaskType = tm_request->TaskType;
 637                 tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
 638                 tm_reply->VP_ID = tm_request->VP_ID;
 639                 tm_reply->VF_ID = tm_request->VF_ID;
 640                 sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
 641                 if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 642                     sz))
 643                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 644                             __LINE__, __func__);
 645                 return 1;
 646         }
 647
 648         dctlprintk(ioc,
 649                    ioc_info(ioc, "%s: handle(0x%04x), lun(%d), task_mid(%d)\n",
 650                             desc, le16_to_cpu(tm_request->DevHandle), lun,
 651                             le16_to_cpu(tm_request->TaskMID)));
 652         return 0;
 653 }
 654
 655 /**
 656  * _ctl_do_mpt_command - main handler for MPT3COMMAND opcode
 657  * @ioc: per adapter object
 658  * @karg: (struct mpt3_ioctl_command)
 659  * @mf: pointer to mf in user space
 660  */
 661 static long
 662 _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
 663         void __user *mf)
 664 {
 665         MPI2RequestHeader_t *mpi_request = NULL, *request;
 666         MPI2DefaultReply_t *mpi_reply;
 667         Mpi26NVMeEncapsulatedRequest_t *nvme_encap_request = NULL;
 668         struct _pcie_device *pcie_device = NULL;
 669         u16 smid;
 670         unsigned long timeout;
 671         u8 issue_reset;
 672         u32 sz, sz_arg;
 673         void *psge;
 674         void *data_out = NULL;
 675         dma_addr_t data_out_dma = 0;
 676         size_t data_out_sz = 0;
 677         void *data_in = NULL;
 678         dma_addr_t data_in_dma = 0;
 679         size_t data_in_sz = 0;
 680         long ret;
 681         u16 device_handle = MPT3SAS_INVALID_DEVICE_HANDLE;
 682
 683         issue_reset = 0;
 684
 685         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
 686                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
 687                 ret = -EAGAIN;
 688                 goto out;
 689         }
 690
 691         ret = mpt3sas_wait_for_ioc(ioc, IOC_OPERATIONAL_WAIT_COUNT);
 692         if (ret)
 693                 goto out;
 694
 695         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 696         if (!mpi_request) {
 697                 ioc_err(ioc, "%s: failed obtaining a memory for mpi_request\n",
 698                         __func__);
 699                 ret = -ENOMEM;
 700                 goto out;
 701         }
 702
 703         /* Check for overflow and wraparound */
 704         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 705             karg.data_sge_offset > (UINT_MAX / 4)) {
 706                 ret = -EINVAL;
 707                 goto out;
 708         }
 709
 710         /* copy in request message frame from user */
 711         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 712                 pr_err("failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 713                     __func__);
 714                 ret = -EFAULT;
 715                 goto out;
 716         }
 717
 718         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 719                 smid = mpt3sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 720                 if (!smid) {
 721                         ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
 722                         ret = -EAGAIN;
 723                         goto out;
 724                 }
 725         } else {
 726                 /* Use first reserved smid for passthrough ioctls */
 727                 smid = ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT + 1;
 728         }
 729
 730         ret = 0;
 731         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
 732         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 733         request = mpt3sas_base_get_msg_frame(ioc, smid);
 734         memset(request, 0, ioc->request_sz);
 735         memcpy(request, mpi_request, karg.data_sge_offset*4);
 736         ioc->ctl_cmds.smid = smid;
 737         data_out_sz = karg.data_out_size;
 738         data_in_sz = karg.data_in_size;
 739
 740         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 741             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 742             mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT ||
 743             mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH ||
 744             mpi_request->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
 745
 746                 device_handle = le16_to_cpu(mpi_request->FunctionDependent1);
 747                 if (!device_handle || (device_handle >
 748                     ioc->facts.MaxDevHandle)) {
 749                         ret = -EINVAL;
 750                         mpt3sas_base_free_smid(ioc, smid);
 751                         goto out;
 752                 }
 753         }
 754
 755         /* obtain dma-able memory for data transfer */
 756         if (data_out_sz) /* WRITE */ {
 757                 data_out = dma_alloc_coherent(&ioc->pdev->dev, data_out_sz,
 758                                 &data_out_dma, GFP_KERNEL);
 759                 if (!data_out) {
 760                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 761                             __LINE__, __func__);
 762                         ret = -ENOMEM;
 763                         mpt3sas_base_free_smid(ioc, smid);
 764                         goto out;
 765                 }
 766                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 767                         data_out_sz)) {
 768                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 769                             __LINE__, __func__);
 770                         ret =  -EFAULT;
 771                         mpt3sas_base_free_smid(ioc, smid);
 772                         goto out;
 773                 }
 774         }
 775
 776         if (data_in_sz) /* READ */ {
 777                 data_in = dma_alloc_coherent(&ioc->pdev->dev, data_in_sz,
 778                                 &data_in_dma, GFP_KERNEL);
 779                 if (!data_in) {
 780                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 781                             __LINE__, __func__);
 782                         ret = -ENOMEM;
 783                         mpt3sas_base_free_smid(ioc, smid);
 784                         goto out;
 785                 }
 786         }
 787
 788         psge = (void *)request + (karg.data_sge_offset*4);
 789
 790         /* send command to firmware */
 791         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 792
 793         init_completion(&ioc->ctl_cmds.done);
 794         switch (mpi_request->Function) {
 795         case MPI2_FUNCTION_NVME_ENCAPSULATED:
 796         {
 797                 nvme_encap_request = (Mpi26NVMeEncapsulatedRequest_t *)request;
 798                 if (!ioc->pcie_sg_lookup) {
 799                         dtmprintk(ioc, ioc_info(ioc,
 800                             "HBA doesn't support NVMe. Rejecting NVMe Encapsulated request.\n"
 801                             ));
 802
 803                         if (ioc->logging_level & MPT_DEBUG_TM)
 804                                 _debug_dump_mf(nvme_encap_request,
 805                                     ioc->request_sz/4);
 806                         mpt3sas_base_free_smid(ioc, smid);
 807                         ret = -EINVAL;
 808                         goto out;
 809                 }
 810                 /*
 811                  * Get the Physical Address of the sense buffer.
 812                  * Use Error Response buffer address field to hold the sense
 813                  * buffer address.
 814                  * Clear the internal sense buffer, which will potentially hold
 815                  * the Completion Queue Entry on return, or 0 if no Entry.
 816                  * Build the PRPs and set direction bits.
 817                  * Send the request.
 818                  */
 819                 nvme_encap_request->ErrorResponseBaseAddress =
 820                     cpu_to_le64(ioc->sense_dma & 0xFFFFFFFF00000000UL);
 821                 nvme_encap_request->ErrorResponseBaseAddress |=
 822                    cpu_to_le64(le32_to_cpu(
 823                    mpt3sas_base_get_sense_buffer_dma(ioc, smid)));
 824                 nvme_encap_request->ErrorResponseAllocationLength =
 825                                         cpu_to_le16(NVME_ERROR_RESPONSE_SIZE);
 826                 memset(ioc->ctl_cmds.sense, 0, NVME_ERROR_RESPONSE_SIZE);
 827                 ioc->build_nvme_prp(ioc, smid, nvme_encap_request,
 828                     data_out_dma, data_out_sz, data_in_dma, data_in_sz);
 829                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 830                         dtmprintk(ioc,
 831                                   ioc_info(ioc, "handle(0x%04x): ioctl failed due to device removal in progress\n",
 832                                            device_handle));
 833                         mpt3sas_base_free_smid(ioc, smid);
 834                         ret = -EINVAL;
 835                         goto out;
 836                 }
 837                 mpt3sas_base_put_smid_nvme_encap(ioc, smid);
 838                 break;
 839         }
 840         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 841         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 842         {
 843                 Mpi2SCSIIORequest_t *scsiio_request =
 844                     (Mpi2SCSIIORequest_t *)request;
 845                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 846                 scsiio_request->SenseBufferLowAddress =
 847                     mpt3sas_base_get_sense_buffer_dma(ioc, smid);
 848                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 849                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 850                         dtmprintk(ioc,
 851                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 852                                            device_handle));
 853                         mpt3sas_base_free_smid(ioc, smid);
 854                         ret = -EINVAL;
 855                         goto out;
 856                 }
 857                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 858                     data_in_dma, data_in_sz);
 859                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 860                         ioc->put_smid_scsi_io(ioc, smid, device_handle);
 861                 else
 862                         ioc->put_smid_default(ioc, smid);
 863                 break;
 864         }
 865         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 866         {
 867                 Mpi2SCSITaskManagementRequest_t *tm_request =
 868                     (Mpi2SCSITaskManagementRequest_t *)request;
 869
 870                 dtmprintk(ioc,
 871                           ioc_info(ioc, "TASK_MGMT: handle(0x%04x), task_type(0x%02x)\n",
 872                                    le16_to_cpu(tm_request->DevHandle),
 873                                    tm_request->TaskType));
 874                 ioc->got_task_abort_from_ioctl = 1;
 875                 if (tm_request->TaskType ==
 876                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 877                     tm_request->TaskType ==
 878                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 879                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 880                                 mpt3sas_base_free_smid(ioc, smid);
 881                                 ioc->got_task_abort_from_ioctl = 0;
 882                                 goto out;
 883                         }
 884                 }
 885                 ioc->got_task_abort_from_ioctl = 0;
 886
 887                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 888                         dtmprintk(ioc,
 889                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 890                                            device_handle));
 891                         mpt3sas_base_free_smid(ioc, smid);
 892                         ret = -EINVAL;
 893                         goto out;
 894                 }
 895                 mpt3sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 896                     tm_request->DevHandle));
 897                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 898                     data_in_dma, data_in_sz);
 899                 ioc->put_smid_hi_priority(ioc, smid, 0);
 900                 break;
 901         }
 902         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 903         {
 904                 Mpi2SmpPassthroughRequest_t *smp_request =
 905                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 906                 u8 *data;
 907
 908                 if (!ioc->multipath_on_hba) {
 909                         /* ioc determines which port to use */
 910                         smp_request->PhysicalPort = 0xFF;
 911                 }
 912                 if (smp_request->PassthroughFlags &
 913                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 914                         data = (u8 *)&smp_request->SGL;
 915                 else {
 916                         if (unlikely(data_out == NULL)) {
 917                                 pr_err("failure at %s:%d/%s()!\n",
 918                                     __FILE__, __LINE__, __func__);
 919                                 mpt3sas_base_free_smid(ioc, smid);
 920                                 ret = -EINVAL;
 921                                 goto out;
 922                         }
 923                         data = data_out;
 924                 }
 925
 926                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 927                         ioc->ioc_link_reset_in_progress = 1;
 928                         ioc->ignore_loginfos = 1;
 929                 }
 930                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 931                     data_in_sz);
 932                 ioc->put_smid_default(ioc, smid);
 933                 break;
 934         }
 935         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 936         {
 937                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 938                         dtmprintk(ioc,
 939                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 940                                            device_handle));
 941                         mpt3sas_base_free_smid(ioc, smid);
 942                         ret = -EINVAL;
 943                         goto out;
 944                 }
 945                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 946                     data_in_sz);
 947                 ioc->put_smid_default(ioc, smid);
 948                 break;
 949         }
 950         case MPI2_FUNCTION_FW_DOWNLOAD:
 951         {
 952                 if (ioc->pdev->vendor == MPI2_MFGPAGE_VENDORID_ATTO) {
 953                         ioc_info(ioc, "Firmware download not supported for ATTO HBA.\n");
 954                         ret = -EPERM;
 955                         break;
 956                 }
 957                 fallthrough;
 958         }
 959         case MPI2_FUNCTION_FW_UPLOAD:
 960         {
 961                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 962                     data_in_sz);
 963                 ioc->put_smid_default(ioc, smid);
 964                 break;
 965         }
 966         case MPI2_FUNCTION_TOOLBOX:
 967         {
 968                 Mpi2ToolboxCleanRequest_t *toolbox_request =
 969                         (Mpi2ToolboxCleanRequest_t *)mpi_request;
 970
 971                 if ((toolbox_request->Tool == MPI2_TOOLBOX_DIAGNOSTIC_CLI_TOOL)
 972                     || (toolbox_request->Tool ==
 973                     MPI26_TOOLBOX_BACKEND_PCIE_LANE_MARGIN))
 974                         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 975                                 data_in_dma, data_in_sz);
 976                 else if (toolbox_request->Tool ==
 977                                 MPI2_TOOLBOX_MEMORY_MOVE_TOOL) {
 978                         Mpi2ToolboxMemMoveRequest_t *mem_move_request =
 979                                         (Mpi2ToolboxMemMoveRequest_t *)request;
 980                         Mpi2SGESimple64_t tmp, *src = NULL, *dst = NULL;
 981
 982                         ioc->build_sg_mpi(ioc, psge, data_out_dma,
 983                                         data_out_sz, data_in_dma, data_in_sz);
 984                         if (data_out_sz && !data_in_sz) {
 985                                 dst =
 986                                     (Mpi2SGESimple64_t *)&mem_move_request->SGL;
 987                                 src = (void *)dst + ioc->sge_size;
 988
 989                                 memcpy(&tmp, src, ioc->sge_size);
 990                                 memcpy(src, dst, ioc->sge_size);
 991                                 memcpy(dst, &tmp, ioc->sge_size);
 992                         }
 993                         if (ioc->logging_level & MPT_DEBUG_TM) {
 994                                 ioc_info(ioc,
 995                                   "Mpi2ToolboxMemMoveRequest_t request msg\n");
 996                                 _debug_dump_mf(mem_move_request,
 997                                                         ioc->request_sz/4);
 998                         }
 999                 } else
1000                         ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
1001                             data_in_dma, data_in_sz);
1002                 ioc->put_smid_default(ioc, smid);
1003                 break;
1004         }
1005         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
1006         {
1007                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
1008                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
1009
1010                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
1011                     || sasiounit_request->Operation ==
1012                     MPI2_SAS_OP_PHY_LINK_RESET) {
1013                         ioc->ioc_link_reset_in_progress = 1;
1014                         ioc->ignore_loginfos = 1;
1015                 }
1016                 /* drop to default case for posting the request */
1017         }
1018                 fallthrough;
1019         default:
1020                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
1021                     data_in_dma, data_in_sz);
1022                 ioc->put_smid_default(ioc, smid);
1023                 break;
1024         }
1025
1026         if (karg.timeout < MPT3_IOCTL_DEFAULT_TIMEOUT)
1027                 timeout = MPT3_IOCTL_DEFAULT_TIMEOUT;
1028         else
1029                 timeout = karg.timeout;
1030         wait_for_completion_timeout(&ioc->ctl_cmds.done, timeout*HZ);
1031         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
1032                 Mpi2SCSITaskManagementRequest_t *tm_request =
1033                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
1034                 mpt3sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
1035                     tm_request->DevHandle));
1036                 mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
1037         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
1038             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
1039                 ioc->ioc_link_reset_in_progress) {
1040                 ioc->ioc_link_reset_in_progress = 0;
1041                 ioc->ignore_loginfos = 0;
1042         }
1043         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1044                 mpt3sas_check_cmd_timeout(ioc,
1045                     ioc->ctl_cmds.status, mpi_request,
1046                     karg.data_sge_offset, issue_reset);
1047                 goto issue_host_reset;
1048         }
1049
1050         mpi_reply = ioc->ctl_cmds.reply;
1051
1052         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
1053             (ioc->logging_level & MPT_DEBUG_TM)) {
1054                 Mpi2SCSITaskManagementReply_t *tm_reply =
1055                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
1056
1057                 ioc_info(ioc, "TASK_MGMT: IOCStatus(0x%04x), IOCLogInfo(0x%08x), TerminationCount(0x%08x)\n",
1058                          le16_to_cpu(tm_reply->IOCStatus),
1059                          le32_to_cpu(tm_reply->IOCLogInfo),
1060                          le32_to_cpu(tm_reply->TerminationCount));
1061         }
1062
1063         /* copy out xdata to user */
1064         if (data_in_sz) {
1065                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
1066                     data_in_sz)) {
1067                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1068                             __LINE__, __func__);
1069                         ret = -ENODATA;
1070                         goto out;
1071                 }
1072         }
1073
1074         /* copy out reply message frame to user */
1075         if (karg.max_reply_bytes) {
1076                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
1077                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
1078                     sz)) {
1079                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1080                             __LINE__, __func__);
1081                         ret = -ENODATA;
1082                         goto out;
1083                 }
1084         }
1085
1086         /* copy out sense/NVMe Error Response to user */
1087         if (karg.max_sense_bytes && (mpi_request->Function ==
1088             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
1089             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH || mpi_request->Function ==
1090             MPI2_FUNCTION_NVME_ENCAPSULATED)) {
1091                 if (karg.sense_data_ptr == NULL) {
1092                         ioc_info(ioc, "Response buffer provided by application is NULL; Response data will not be returned\n");
1093                         goto out;
1094                 }
1095                 sz_arg = (mpi_request->Function ==
1096                 MPI2_FUNCTION_NVME_ENCAPSULATED) ? NVME_ERROR_RESPONSE_SIZE :
1097                                                         SCSI_SENSE_BUFFERSIZE;
1098                 sz = min_t(u32, karg.max_sense_bytes, sz_arg);
1099                 if (copy_to_user(karg.sense_data_ptr, ioc->ctl_cmds.sense,
1100                     sz)) {
1101                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1102                                 __LINE__, __func__);
1103                         ret = -ENODATA;
1104                         goto out;
1105                 }
1106         }
1107
1108  issue_host_reset:
1109         if (issue_reset) {
1110                 ret = -ENODATA;
1111                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
1112                     mpi_request->Function ==
1113                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
1114                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
1115                         ioc_info(ioc, "issue target reset: handle = (0x%04x)\n",
1116                                  le16_to_cpu(mpi_request->FunctionDependent1));
1117                         mpt3sas_halt_firmware(ioc);
1118                         pcie_device = mpt3sas_get_pdev_by_handle(ioc,
1119                                 le16_to_cpu(mpi_request->FunctionDependent1));
1120                         if (pcie_device && (!ioc->tm_custom_handling) &&
1121                             (!(mpt3sas_scsih_is_pcie_scsi_device(
1122                             pcie_device->device_info))))
1123                                 mpt3sas_scsih_issue_locked_tm(ioc,
1124                                   le16_to_cpu(mpi_request->FunctionDependent1),
1125                                   0, 0, 0,
1126                                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1127                                   0, pcie_device->reset_timeout,
1128                         MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE);
1129                         else
1130                                 mpt3sas_scsih_issue_locked_tm(ioc,
1131                                   le16_to_cpu(mpi_request->FunctionDependent1),
1132                                   0, 0, 0,
1133                                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1134                                   0, 30, MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET);
1135                 } else
1136                         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1137         }
1138
1139  out:
1140         if (pcie_device)
1141                 pcie_device_put(pcie_device);
1142
1143         /* free memory associated with sg buffers */
1144         if (data_in)
1145                 dma_free_coherent(&ioc->pdev->dev, data_in_sz, data_in,
1146                     data_in_dma);
1147
1148         if (data_out)
1149                 dma_free_coherent(&ioc->pdev->dev, data_out_sz, data_out,
1150                     data_out_dma);
1151
1152         kfree(mpi_request);
1153         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1154         return ret;
1155 }
1156
1157 /**
1158  * _ctl_getiocinfo - main handler for MPT3IOCINFO opcode
1159  * @ioc: per adapter object
1160  * @arg: user space buffer containing ioctl content
1161  */
1162 static long
1163 _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1164 {
1165         struct mpt3_ioctl_iocinfo karg;
1166
1167         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1168                                  __func__));
1169
1170         memset(&karg, 0 , sizeof(karg));
1171         if (ioc->pfacts)
1172                 karg.port_number = ioc->pfacts[0].PortNumber;
1173         karg.hw_rev = ioc->pdev->revision;
1174         karg.pci_id = ioc->pdev->device;
1175         karg.subsystem_device = ioc->pdev->subsystem_device;
1176         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1177         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1178         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1179         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1180         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1181         karg.firmware_version = ioc->facts.FWVersion.Word;
1182         strcpy(karg.driver_version, ioc->driver_name);
1183         strcat(karg.driver_version, "-");
1184         switch  (ioc->hba_mpi_version_belonged) {
1185         case MPI2_VERSION:
1186                 if (ioc->is_warpdrive)
1187                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1188                 else
1189                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1190                 strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1191                 break;
1192         case MPI25_VERSION:
1193         case MPI26_VERSION:
1194                 if (ioc->is_gen35_ioc)
1195                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS35;
1196                 else
1197                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS3;
1198                 strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
1199                 break;
1200         }
1201         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1202
1203         if (copy_to_user(arg, &karg, sizeof(karg))) {
1204                 pr_err("failure at %s:%d/%s()!\n",
1205                     __FILE__, __LINE__, __func__);
1206                 return -EFAULT;
1207         }
1208         return 0;
1209 }
1210
1211 /**
1212  * _ctl_eventquery - main handler for MPT3EVENTQUERY opcode
1213  * @ioc: per adapter object
1214  * @arg: user space buffer containing ioctl content
1215  */
1216 static long
1217 _ctl_eventquery(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1218 {
1219         struct mpt3_ioctl_eventquery karg;
1220
1221         if (copy_from_user(&karg, arg, sizeof(karg))) {
1222                 pr_err("failure at %s:%d/%s()!\n",
1223                     __FILE__, __LINE__, __func__);
1224                 return -EFAULT;
1225         }
1226
1227         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1228                                  __func__));
1229
1230         karg.event_entries = MPT3SAS_CTL_EVENT_LOG_SIZE;
1231         memcpy(karg.event_types, ioc->event_type,
1232             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1233
1234         if (copy_to_user(arg, &karg, sizeof(karg))) {
1235                 pr_err("failure at %s:%d/%s()!\n",
1236                     __FILE__, __LINE__, __func__);
1237                 return -EFAULT;
1238         }
1239         return 0;
1240 }
1241
1242 /**
1243  * _ctl_eventenable - main handler for MPT3EVENTENABLE opcode
1244  * @ioc: per adapter object
1245  * @arg: user space buffer containing ioctl content
1246  */
1247 static long
1248 _ctl_eventenable(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1249 {
1250         struct mpt3_ioctl_eventenable karg;
1251
1252         if (copy_from_user(&karg, arg, sizeof(karg))) {
1253                 pr_err("failure at %s:%d/%s()!\n",
1254                     __FILE__, __LINE__, __func__);
1255                 return -EFAULT;
1256         }
1257
1258         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1259                                  __func__));
1260
1261         memcpy(ioc->event_type, karg.event_types,
1262             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1263         mpt3sas_base_validate_event_type(ioc, ioc->event_type);
1264
1265         if (ioc->event_log)
1266                 return 0;
1267         /* initialize event_log */
1268         ioc->event_context = 0;
1269         ioc->aen_event_read_flag = 0;
1270         ioc->event_log = kcalloc(MPT3SAS_CTL_EVENT_LOG_SIZE,
1271             sizeof(struct MPT3_IOCTL_EVENTS), GFP_KERNEL);
1272         if (!ioc->event_log) {
1273                 pr_err("failure at %s:%d/%s()!\n",
1274                     __FILE__, __LINE__, __func__);
1275                 return -ENOMEM;
1276         }
1277         return 0;
1278 }
1279
1280 /**
1281  * _ctl_eventreport - main handler for MPT3EVENTREPORT opcode
1282  * @ioc: per adapter object
1283  * @arg: user space buffer containing ioctl content
1284  */
1285 static long
1286 _ctl_eventreport(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1287 {
1288         struct mpt3_ioctl_eventreport karg;
1289         u32 number_bytes, max_events, max;
1290         struct mpt3_ioctl_eventreport __user *uarg = arg;
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         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1299                                  __func__));
1300
1301         number_bytes = karg.hdr.max_data_size -
1302             sizeof(struct mpt3_ioctl_header);
1303         max_events = number_bytes/sizeof(struct MPT3_IOCTL_EVENTS);
1304         max = min_t(u32, MPT3SAS_CTL_EVENT_LOG_SIZE, max_events);
1305
1306         /* If fewer than 1 event is requested, there must have
1307          * been some type of error.
1308          */
1309         if (!max || !ioc->event_log)
1310                 return -ENODATA;
1311
1312         number_bytes = max * sizeof(struct MPT3_IOCTL_EVENTS);
1313         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1314                 pr_err("failure at %s:%d/%s()!\n",
1315                     __FILE__, __LINE__, __func__);
1316                 return -EFAULT;
1317         }
1318
1319         /* reset flag so SIGIO can restart */
1320         ioc->aen_event_read_flag = 0;
1321         return 0;
1322 }
1323
1324 /**
1325  * _ctl_do_reset - main handler for MPT3HARDRESET opcode
1326  * @ioc: per adapter object
1327  * @arg: user space buffer containing ioctl content
1328  */
1329 static long
1330 _ctl_do_reset(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1331 {
1332         struct mpt3_ioctl_diag_reset karg;
1333         int retval;
1334
1335         if (copy_from_user(&karg, arg, sizeof(karg))) {
1336                 pr_err("failure at %s:%d/%s()!\n",
1337                     __FILE__, __LINE__, __func__);
1338                 return -EFAULT;
1339         }
1340
1341         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1342             ioc->is_driver_loading)
1343                 return -EAGAIN;
1344
1345         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1346                                  __func__));
1347
1348         ioc->reset_from_user = 1;
1349         retval = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1350         ioc_info(ioc,
1351             "Ioctl: host reset: %s\n", ((!retval) ? "SUCCESS" : "FAILED"));
1352         return 0;
1353 }
1354
1355 /**
1356  * _ctl_btdh_search_sas_device - searching for sas device
1357  * @ioc: per adapter object
1358  * @btdh: btdh ioctl payload
1359  */
1360 static int
1361 _ctl_btdh_search_sas_device(struct MPT3SAS_ADAPTER *ioc,
1362         struct mpt3_ioctl_btdh_mapping *btdh)
1363 {
1364         struct _sas_device *sas_device;
1365         unsigned long flags;
1366         int rc = 0;
1367
1368         if (list_empty(&ioc->sas_device_list))
1369                 return rc;
1370
1371         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1372         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1373                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1374                     btdh->handle == sas_device->handle) {
1375                         btdh->bus = sas_device->channel;
1376                         btdh->id = sas_device->id;
1377                         rc = 1;
1378                         goto out;
1379                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1380                     sas_device->id && btdh->handle == 0xFFFF) {
1381                         btdh->handle = sas_device->handle;
1382                         rc = 1;
1383                         goto out;
1384                 }
1385         }
1386  out:
1387         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1388         return rc;
1389 }
1390
1391 /**
1392  * _ctl_btdh_search_pcie_device - searching for pcie device
1393  * @ioc: per adapter object
1394  * @btdh: btdh ioctl payload
1395  */
1396 static int
1397 _ctl_btdh_search_pcie_device(struct MPT3SAS_ADAPTER *ioc,
1398         struct mpt3_ioctl_btdh_mapping *btdh)
1399 {
1400         struct _pcie_device *pcie_device;
1401         unsigned long flags;
1402         int rc = 0;
1403
1404         if (list_empty(&ioc->pcie_device_list))
1405                 return rc;
1406
1407         spin_lock_irqsave(&ioc->pcie_device_lock, flags);
1408         list_for_each_entry(pcie_device, &ioc->pcie_device_list, list) {
1409                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1410                            btdh->handle == pcie_device->handle) {
1411                         btdh->bus = pcie_device->channel;
1412                         btdh->id = pcie_device->id;
1413                         rc = 1;
1414                         goto out;
1415                 } else if (btdh->bus == pcie_device->channel && btdh->id ==
1416                            pcie_device->id && btdh->handle == 0xFFFF) {
1417                         btdh->handle = pcie_device->handle;
1418                         rc = 1;
1419                         goto out;
1420                 }
1421         }
1422  out:
1423         spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
1424         return rc;
1425 }
1426
1427 /**
1428  * _ctl_btdh_search_raid_device - searching for raid device
1429  * @ioc: per adapter object
1430  * @btdh: btdh ioctl payload
1431  */
1432 static int
1433 _ctl_btdh_search_raid_device(struct MPT3SAS_ADAPTER *ioc,
1434         struct mpt3_ioctl_btdh_mapping *btdh)
1435 {
1436         struct _raid_device *raid_device;
1437         unsigned long flags;
1438         int rc = 0;
1439
1440         if (list_empty(&ioc->raid_device_list))
1441                 return rc;
1442
1443         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1444         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1445                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1446                     btdh->handle == raid_device->handle) {
1447                         btdh->bus = raid_device->channel;
1448                         btdh->id = raid_device->id;
1449                         rc = 1;
1450                         goto out;
1451                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1452                     raid_device->id && btdh->handle == 0xFFFF) {
1453                         btdh->handle = raid_device->handle;
1454                         rc = 1;
1455                         goto out;
1456                 }
1457         }
1458  out:
1459         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1460         return rc;
1461 }
1462
1463 /**
1464  * _ctl_btdh_mapping - main handler for MPT3BTDHMAPPING opcode
1465  * @ioc: per adapter object
1466  * @arg: user space buffer containing ioctl content
1467  */
1468 static long
1469 _ctl_btdh_mapping(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1470 {
1471         struct mpt3_ioctl_btdh_mapping karg;
1472         int rc;
1473
1474         if (copy_from_user(&karg, arg, sizeof(karg))) {
1475                 pr_err("failure at %s:%d/%s()!\n",
1476                     __FILE__, __LINE__, __func__);
1477                 return -EFAULT;
1478         }
1479
1480         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1481                                  __func__));
1482
1483         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1484         if (!rc)
1485                 rc = _ctl_btdh_search_pcie_device(ioc, &karg);
1486         if (!rc)
1487                 _ctl_btdh_search_raid_device(ioc, &karg);
1488
1489         if (copy_to_user(arg, &karg, sizeof(karg))) {
1490                 pr_err("failure at %s:%d/%s()!\n",
1491                     __FILE__, __LINE__, __func__);
1492                 return -EFAULT;
1493         }
1494         return 0;
1495 }
1496
1497 /**
1498  * _ctl_diag_capability - return diag buffer capability
1499  * @ioc: per adapter object
1500  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1501  *
1502  * returns 1 when diag buffer support is enabled in firmware
1503  */
1504 static u8
1505 _ctl_diag_capability(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type)
1506 {
1507         u8 rc = 0;
1508
1509         switch (buffer_type) {
1510         case MPI2_DIAG_BUF_TYPE_TRACE:
1511                 if (ioc->facts.IOCCapabilities &
1512                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1513                         rc = 1;
1514                 break;
1515         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1516                 if (ioc->facts.IOCCapabilities &
1517                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1518                         rc = 1;
1519                 break;
1520         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1521                 if (ioc->facts.IOCCapabilities &
1522                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1523                         rc = 1;
1524         }
1525
1526         return rc;
1527 }
1528
1529 /**
1530  * _ctl_diag_get_bufftype - return diag buffer type
1531  *              either TRACE, SNAPSHOT, or EXTENDED
1532  * @ioc: per adapter object
1533  * @unique_id: specifies the unique_id for the buffer
1534  *
1535  * returns MPT3_DIAG_UID_NOT_FOUND if the id not found
1536  */
1537 static u8
1538 _ctl_diag_get_bufftype(struct MPT3SAS_ADAPTER *ioc, u32 unique_id)
1539 {
1540         u8  index;
1541
1542         for (index = 0; index < MPI2_DIAG_BUF_TYPE_COUNT; index++) {
1543                 if (ioc->unique_id[index] == unique_id)
1544                         return index;
1545         }
1546
1547         return MPT3_DIAG_UID_NOT_FOUND;
1548 }
1549
1550 /**
1551  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1552  * @ioc: per adapter object
1553  * @diag_register: the diag_register struct passed in from user space
1554  *
1555  */
1556 static long
1557 _ctl_diag_register_2(struct MPT3SAS_ADAPTER *ioc,
1558         struct mpt3_diag_register *diag_register)
1559 {
1560         int rc, i;
1561         void *request_data = NULL;
1562         dma_addr_t request_data_dma;
1563         u32 request_data_sz = 0;
1564         Mpi2DiagBufferPostRequest_t *mpi_request;
1565         Mpi2DiagBufferPostReply_t *mpi_reply;
1566         u8 buffer_type;
1567         u16 smid;
1568         u16 ioc_status;
1569         u32 ioc_state;
1570         u8 issue_reset = 0;
1571
1572         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1573                                  __func__));
1574
1575         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1576         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1577                 ioc_err(ioc, "%s: failed due to ioc not operational\n",
1578                         __func__);
1579                 rc = -EAGAIN;
1580                 goto out;
1581         }
1582
1583         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
1584                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
1585                 rc = -EAGAIN;
1586                 goto out;
1587         }
1588
1589         buffer_type = diag_register->buffer_type;
1590         if (!_ctl_diag_capability(ioc, buffer_type)) {
1591                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1592                         __func__, buffer_type);
1593                 return -EPERM;
1594         }
1595
1596         if (diag_register->unique_id == 0) {
1597                 ioc_err(ioc,
1598                     "%s: Invalid UID(0x%08x), buffer_type(0x%02x)\n", __func__,
1599                     diag_register->unique_id, buffer_type);
1600                 return -EINVAL;
1601         }
1602
1603         if ((ioc->diag_buffer_status[buffer_type] &
1604             MPT3_DIAG_BUFFER_IS_APP_OWNED) &&
1605             !(ioc->diag_buffer_status[buffer_type] &
1606             MPT3_DIAG_BUFFER_IS_RELEASED)) {
1607                 ioc_err(ioc,
1608                     "%s: buffer_type(0x%02x) is already registered by application with UID(0x%08x)\n",
1609                     __func__, buffer_type, ioc->unique_id[buffer_type]);
1610                 return -EINVAL;
1611         }
1612
1613         if (ioc->diag_buffer_status[buffer_type] &
1614             MPT3_DIAG_BUFFER_IS_REGISTERED) {
1615                 /*
1616                  * If driver posts buffer initially, then an application wants
1617                  * to Register that buffer (own it) without Releasing first,
1618                  * the application Register command MUST have the same buffer
1619                  * type and size in the Register command (obtained from the
1620                  * Query command). Otherwise that Register command will be
1621                  * failed. If the application has released the buffer but wants
1622                  * to re-register it, it should be allowed as long as the
1623                  * Unique-Id/Size match.
1624                  */
1625
1626                 if (ioc->unique_id[buffer_type] == MPT3DIAGBUFFUNIQUEID &&
1627                     ioc->diag_buffer_sz[buffer_type] ==
1628                     diag_register->requested_buffer_size) {
1629
1630                         if (!(ioc->diag_buffer_status[buffer_type] &
1631                              MPT3_DIAG_BUFFER_IS_RELEASED)) {
1632                                 dctlprintk(ioc, ioc_info(ioc,
1633                                     "%s: diag_buffer (%d) ownership changed. old-ID(0x%08x), new-ID(0x%08x)\n",
1634                                     __func__, buffer_type,
1635                                     ioc->unique_id[buffer_type],
1636                                     diag_register->unique_id));
1637
1638                                 /*
1639                                  * Application wants to own the buffer with
1640                                  * the same size.
1641                                  */
1642                                 ioc->unique_id[buffer_type] =
1643                                     diag_register->unique_id;
1644                                 rc = 0; /* success */
1645                                 goto out;
1646                         }
1647                 } else if (ioc->unique_id[buffer_type] !=
1648                     MPT3DIAGBUFFUNIQUEID) {
1649                         if (ioc->unique_id[buffer_type] !=
1650                             diag_register->unique_id ||
1651                             ioc->diag_buffer_sz[buffer_type] !=
1652                             diag_register->requested_buffer_size ||
1653                             !(ioc->diag_buffer_status[buffer_type] &
1654                             MPT3_DIAG_BUFFER_IS_RELEASED)) {
1655                                 ioc_err(ioc,
1656                                     "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1657                                     __func__, buffer_type);
1658                                 return -EINVAL;
1659                         }
1660                 } else {
1661                         ioc_err(ioc, "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1662                             __func__, buffer_type);
1663                         return -EINVAL;
1664                 }
1665         } else if (ioc->diag_buffer_status[buffer_type] &
1666             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
1667
1668                 if (ioc->unique_id[buffer_type] != MPT3DIAGBUFFUNIQUEID ||
1669                     ioc->diag_buffer_sz[buffer_type] !=
1670                     diag_register->requested_buffer_size) {
1671
1672                         ioc_err(ioc,
1673                             "%s: already a buffer is allocated for buffer_type(0x%02x) of size %d bytes, so please try registering again with same size\n",
1674                              __func__, buffer_type,
1675                             ioc->diag_buffer_sz[buffer_type]);
1676                         return -EINVAL;
1677                 }
1678         }
1679
1680         if (diag_register->requested_buffer_size % 4)  {
1681                 ioc_err(ioc, "%s: the requested_buffer_size is not 4 byte aligned\n",
1682                         __func__);
1683                 return -EINVAL;
1684         }
1685
1686         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1687         if (!smid) {
1688                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
1689                 rc = -EAGAIN;
1690                 goto out;
1691         }
1692
1693         rc = 0;
1694         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
1695         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1696         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1697         memset(mpi_request, 0, ioc->request_sz);
1698         ioc->ctl_cmds.smid = smid;
1699
1700         request_data = ioc->diag_buffer[buffer_type];
1701         request_data_sz = diag_register->requested_buffer_size;
1702         ioc->unique_id[buffer_type] = diag_register->unique_id;
1703         /* Reset ioc variables used for additional query commands */
1704         ioc->reset_from_user = 0;
1705         memset(&ioc->htb_rel, 0, sizeof(struct htb_rel_query));
1706         ioc->diag_buffer_status[buffer_type] &=
1707             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1708         memcpy(ioc->product_specific[buffer_type],
1709             diag_register->product_specific, MPT3_PRODUCT_SPECIFIC_DWORDS);
1710         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1711
1712         if (request_data) {
1713                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1714                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1715                         dma_free_coherent(&ioc->pdev->dev,
1716                                         ioc->diag_buffer_sz[buffer_type],
1717                                         request_data, request_data_dma);
1718                         request_data = NULL;
1719                 }
1720         }
1721
1722         if (request_data == NULL) {
1723                 ioc->diag_buffer_sz[buffer_type] = 0;
1724                 ioc->diag_buffer_dma[buffer_type] = 0;
1725                 request_data = dma_alloc_coherent(&ioc->pdev->dev,
1726                                 request_data_sz, &request_data_dma, GFP_KERNEL);
1727                 if (request_data == NULL) {
1728                         ioc_err(ioc, "%s: failed allocating memory for diag buffers, requested size(%d)\n",
1729                                 __func__, request_data_sz);
1730                         mpt3sas_base_free_smid(ioc, smid);
1731                         rc = -ENOMEM;
1732                         goto out;
1733                 }
1734                 ioc->diag_buffer[buffer_type] = request_data;
1735                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1736                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1737         }
1738
1739         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1740         mpi_request->BufferType = diag_register->buffer_type;
1741         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1742         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1743         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1744         mpi_request->VF_ID = 0; /* TODO */
1745         mpi_request->VP_ID = 0;
1746
1747         dctlprintk(ioc,
1748                    ioc_info(ioc, "%s: diag_buffer(0x%p), dma(0x%llx), sz(%d)\n",
1749                             __func__, request_data,
1750                             (unsigned long long)request_data_dma,
1751                             le32_to_cpu(mpi_request->BufferLength)));
1752
1753         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
1754                 mpi_request->ProductSpecific[i] =
1755                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1756
1757         init_completion(&ioc->ctl_cmds.done);
1758         ioc->put_smid_default(ioc, smid);
1759         wait_for_completion_timeout(&ioc->ctl_cmds.done,
1760             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
1761
1762         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1763                 mpt3sas_check_cmd_timeout(ioc,
1764                     ioc->ctl_cmds.status, mpi_request,
1765                     sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
1766                 goto issue_host_reset;
1767         }
1768
1769         /* process the completed Reply Message Frame */
1770         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
1771                 ioc_err(ioc, "%s: no reply message\n", __func__);
1772                 rc = -EFAULT;
1773                 goto out;
1774         }
1775
1776         mpi_reply = ioc->ctl_cmds.reply;
1777         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1778
1779         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1780                 ioc->diag_buffer_status[buffer_type] |=
1781                         MPT3_DIAG_BUFFER_IS_REGISTERED;
1782                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
1783         } else {
1784                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
1785                          __func__,
1786                          ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1787                 rc = -EFAULT;
1788         }
1789
1790  issue_host_reset:
1791         if (issue_reset)
1792                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1793
1794  out:
1795
1796         if (rc && request_data) {
1797                 dma_free_coherent(&ioc->pdev->dev, request_data_sz,
1798                     request_data, request_data_dma);
1799                 ioc->diag_buffer[buffer_type] = NULL;
1800                 ioc->diag_buffer_status[buffer_type] &=
1801                     ~MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1802         }
1803
1804         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1805         return rc;
1806 }
1807
1808 /**
1809  * mpt3sas_enable_diag_buffer - enabling diag_buffers support driver load time
1810  * @ioc: per adapter object
1811  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1812  *
1813  * This is called when command line option diag_buffer_enable is enabled
1814  * at driver load time.
1815  */
1816 void
1817 mpt3sas_enable_diag_buffer(struct MPT3SAS_ADAPTER *ioc, u8 bits_to_register)
1818 {
1819         struct mpt3_diag_register diag_register;
1820         u32 ret_val;
1821         u32 trace_buff_size = ioc->manu_pg11.HostTraceBufferMaxSizeKB<<10;
1822         u32 min_trace_buff_size = 0;
1823         u32 decr_trace_buff_size = 0;
1824
1825         memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
1826
1827         if (bits_to_register & 1) {
1828                 ioc_info(ioc, "registering trace buffer support\n");
1829                 ioc->diag_trigger_master.MasterData =
1830                     (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
1831                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1832                 diag_register.unique_id =
1833                     (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
1834                     (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
1835
1836                 if (trace_buff_size != 0) {
1837                         diag_register.requested_buffer_size = trace_buff_size;
1838                         min_trace_buff_size =
1839                             ioc->manu_pg11.HostTraceBufferMinSizeKB<<10;
1840                         decr_trace_buff_size =
1841                             ioc->manu_pg11.HostTraceBufferDecrementSizeKB<<10;
1842
1843                         if (min_trace_buff_size > trace_buff_size) {
1844                                 /* The buff size is not set correctly */
1845                                 ioc_err(ioc,
1846                                     "Min Trace Buff size (%d KB) greater than Max Trace Buff size (%d KB)\n",
1847                                      min_trace_buff_size>>10,
1848                                      trace_buff_size>>10);
1849                                 ioc_err(ioc,
1850                                     "Using zero Min Trace Buff Size\n");
1851                                 min_trace_buff_size = 0;
1852                         }
1853
1854                         if (decr_trace_buff_size == 0) {
1855                                 /*
1856                                  * retry the min size if decrement
1857                                  * is not available.
1858                                  */
1859                                 decr_trace_buff_size =
1860                                     trace_buff_size - min_trace_buff_size;
1861                         }
1862                 } else {
1863                         /* register for 2MB buffers  */
1864                         diag_register.requested_buffer_size = 2 * (1024 * 1024);
1865                 }
1866
1867                 do {
1868                         ret_val = _ctl_diag_register_2(ioc,  &diag_register);
1869
1870                         if (ret_val == -ENOMEM && min_trace_buff_size &&
1871                             (trace_buff_size - decr_trace_buff_size) >=
1872                             min_trace_buff_size) {
1873                                 /* adjust the buffer size */
1874                                 trace_buff_size -= decr_trace_buff_size;
1875                                 diag_register.requested_buffer_size =
1876                                     trace_buff_size;
1877                         } else
1878                                 break;
1879                 } while (true);
1880
1881                 if (ret_val == -ENOMEM)
1882                         ioc_err(ioc,
1883                             "Cannot allocate trace buffer memory. Last memory tried = %d KB\n",
1884                             diag_register.requested_buffer_size>>10);
1885                 else if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE]
1886                     & MPT3_DIAG_BUFFER_IS_REGISTERED) {
1887                         ioc_err(ioc, "Trace buffer memory %d KB allocated\n",
1888                             diag_register.requested_buffer_size>>10);
1889                         if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
1890                                 ioc->diag_buffer_status[
1891                                     MPI2_DIAG_BUF_TYPE_TRACE] |=
1892                                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1893                 }
1894         }
1895
1896         if (bits_to_register & 2) {
1897                 ioc_info(ioc, "registering snapshot buffer support\n");
1898                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1899                 /* register for 2MB buffers  */
1900                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1901                 diag_register.unique_id = 0x7075901;
1902                 _ctl_diag_register_2(ioc,  &diag_register);
1903         }
1904
1905         if (bits_to_register & 4) {
1906                 ioc_info(ioc, "registering extended buffer support\n");
1907                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1908                 /* register for 2MB buffers  */
1909                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1910                 diag_register.unique_id = 0x7075901;
1911                 _ctl_diag_register_2(ioc,  &diag_register);
1912         }
1913 }
1914
1915 /**
1916  * _ctl_diag_register - application register with driver
1917  * @ioc: per adapter object
1918  * @arg: user space buffer containing ioctl content
1919  *
1920  * This will allow the driver to setup any required buffers that will be
1921  * needed by firmware to communicate with the driver.
1922  */
1923 static long
1924 _ctl_diag_register(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1925 {
1926         struct mpt3_diag_register karg;
1927         long rc;
1928
1929         if (copy_from_user(&karg, arg, sizeof(karg))) {
1930                 pr_err("failure at %s:%d/%s()!\n",
1931                     __FILE__, __LINE__, __func__);
1932                 return -EFAULT;
1933         }
1934
1935         rc = _ctl_diag_register_2(ioc, &karg);
1936
1937         if (!rc && (ioc->diag_buffer_status[karg.buffer_type] &
1938             MPT3_DIAG_BUFFER_IS_REGISTERED))
1939                 ioc->diag_buffer_status[karg.buffer_type] |=
1940                     MPT3_DIAG_BUFFER_IS_APP_OWNED;
1941
1942         return rc;
1943 }
1944
1945 /**
1946  * _ctl_diag_unregister - application unregister with driver
1947  * @ioc: per adapter object
1948  * @arg: user space buffer containing ioctl content
1949  *
1950  * This will allow the driver to cleanup any memory allocated for diag
1951  * messages and to free up any resources.
1952  */
1953 static long
1954 _ctl_diag_unregister(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1955 {
1956         struct mpt3_diag_unregister karg;
1957         void *request_data;
1958         dma_addr_t request_data_dma;
1959         u32 request_data_sz;
1960         u8 buffer_type;
1961
1962         if (copy_from_user(&karg, arg, sizeof(karg))) {
1963                 pr_err("failure at %s:%d/%s()!\n",
1964                     __FILE__, __LINE__, __func__);
1965                 return -EFAULT;
1966         }
1967
1968         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1969                                  __func__));
1970
1971         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
1972         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
1973                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
1974                     __func__, karg.unique_id);
1975                 return -EINVAL;
1976         }
1977
1978         if (!_ctl_diag_capability(ioc, buffer_type)) {
1979                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1980                         __func__, buffer_type);
1981                 return -EPERM;
1982         }
1983
1984         if ((ioc->diag_buffer_status[buffer_type] &
1985             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
1986                 ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
1987                         __func__, buffer_type);
1988                 return -EINVAL;
1989         }
1990         if ((ioc->diag_buffer_status[buffer_type] &
1991             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
1992                 ioc_err(ioc, "%s: buffer_type(0x%02x) has not been released\n",
1993                         __func__, buffer_type);
1994                 return -EINVAL;
1995         }
1996
1997         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1998                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
1999                         __func__, karg.unique_id);
2000                 return -EINVAL;
2001         }
2002
2003         request_data = ioc->diag_buffer[buffer_type];
2004         if (!request_data) {
2005                 ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
2006                         __func__, buffer_type);
2007                 return -ENOMEM;
2008         }
2009
2010         if (ioc->diag_buffer_status[buffer_type] &
2011             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
2012                 ioc->unique_id[buffer_type] = MPT3DIAGBUFFUNIQUEID;
2013                 ioc->diag_buffer_status[buffer_type] &=
2014                     ~MPT3_DIAG_BUFFER_IS_APP_OWNED;
2015                 ioc->diag_buffer_status[buffer_type] &=
2016                     ~MPT3_DIAG_BUFFER_IS_REGISTERED;
2017         } else {
2018                 request_data_sz = ioc->diag_buffer_sz[buffer_type];
2019                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
2020                 dma_free_coherent(&ioc->pdev->dev, request_data_sz,
2021                                 request_data, request_data_dma);
2022                 ioc->diag_buffer[buffer_type] = NULL;
2023                 ioc->diag_buffer_status[buffer_type] = 0;
2024         }
2025         return 0;
2026 }
2027
2028 /**
2029  * _ctl_diag_query - query relevant info associated with diag buffers
2030  * @ioc: per adapter object
2031  * @arg: user space buffer containing ioctl content
2032  *
2033  * The application will send only buffer_type and unique_id.  Driver will
2034  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
2035  * 0x00, the driver will return info specified by Buffer Type.
2036  */
2037 static long
2038 _ctl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2039 {
2040         struct mpt3_diag_query karg;
2041         void *request_data;
2042         int i;
2043         u8 buffer_type;
2044
2045         if (copy_from_user(&karg, arg, sizeof(karg))) {
2046                 pr_err("failure at %s:%d/%s()!\n",
2047                     __FILE__, __LINE__, __func__);
2048                 return -EFAULT;
2049         }
2050
2051         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2052                                  __func__));
2053
2054         karg.application_flags = 0;
2055         buffer_type = karg.buffer_type;
2056
2057         if (!_ctl_diag_capability(ioc, buffer_type)) {
2058                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2059                         __func__, buffer_type);
2060                 return -EPERM;
2061         }
2062
2063         if (!(ioc->diag_buffer_status[buffer_type] &
2064             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED)) {
2065                 if ((ioc->diag_buffer_status[buffer_type] &
2066                     MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2067                         ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2068                                 __func__, buffer_type);
2069                         return -EINVAL;
2070                 }
2071         }
2072
2073         if (karg.unique_id) {
2074                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
2075                         ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2076                                 __func__, karg.unique_id);
2077                         return -EINVAL;
2078                 }
2079         }
2080
2081         request_data = ioc->diag_buffer[buffer_type];
2082         if (!request_data) {
2083                 ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2084                         __func__, buffer_type);
2085                 return -ENOMEM;
2086         }
2087
2088         if ((ioc->diag_buffer_status[buffer_type] &
2089             MPT3_DIAG_BUFFER_IS_REGISTERED))
2090                 karg.application_flags |= MPT3_APP_FLAGS_BUFFER_VALID;
2091
2092         if (!(ioc->diag_buffer_status[buffer_type] &
2093              MPT3_DIAG_BUFFER_IS_RELEASED))
2094                 karg.application_flags |= MPT3_APP_FLAGS_FW_BUFFER_ACCESS;
2095
2096         if (!(ioc->diag_buffer_status[buffer_type] &
2097             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED))
2098                 karg.application_flags |= MPT3_APP_FLAGS_DYNAMIC_BUFFER_ALLOC;
2099
2100         if ((ioc->diag_buffer_status[buffer_type] &
2101             MPT3_DIAG_BUFFER_IS_APP_OWNED))
2102                 karg.application_flags |= MPT3_APP_FLAGS_APP_OWNED;
2103
2104         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2105                 karg.product_specific[i] =
2106                     ioc->product_specific[buffer_type][i];
2107
2108         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
2109         karg.driver_added_buffer_size = 0;
2110         karg.unique_id = ioc->unique_id[buffer_type];
2111         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
2112
2113         if (copy_to_user(arg, &karg, sizeof(struct mpt3_diag_query))) {
2114                 ioc_err(ioc, "%s: unable to write mpt3_diag_query data @ %p\n",
2115                         __func__, arg);
2116                 return -EFAULT;
2117         }
2118         return 0;
2119 }
2120
2121 /**
2122  * mpt3sas_send_diag_release - Diag Release Message
2123  * @ioc: per adapter object
2124  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
2125  * @issue_reset: specifies whether host reset is required.
2126  *
2127  */
2128 int
2129 mpt3sas_send_diag_release(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type,
2130         u8 *issue_reset)
2131 {
2132         Mpi2DiagReleaseRequest_t *mpi_request;
2133         Mpi2DiagReleaseReply_t *mpi_reply;
2134         u16 smid;
2135         u16 ioc_status;
2136         u32 ioc_state;
2137         int rc;
2138         u8 reset_needed = 0;
2139
2140         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2141                                  __func__));
2142
2143         rc = 0;
2144         *issue_reset = 0;
2145
2146
2147         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
2148         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2149                 if (ioc->diag_buffer_status[buffer_type] &
2150                     MPT3_DIAG_BUFFER_IS_REGISTERED)
2151                         ioc->diag_buffer_status[buffer_type] |=
2152                             MPT3_DIAG_BUFFER_IS_RELEASED;
2153                 dctlprintk(ioc,
2154                            ioc_info(ioc, "%s: skipping due to FAULT state\n",
2155                                     __func__));
2156                 rc = -EAGAIN;
2157                 goto out;
2158         }
2159
2160         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2161                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2162                 rc = -EAGAIN;
2163                 goto out;
2164         }
2165
2166         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2167         if (!smid) {
2168                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2169                 rc = -EAGAIN;
2170                 goto out;
2171         }
2172
2173         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2174         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2175         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2176         memset(mpi_request, 0, ioc->request_sz);
2177         ioc->ctl_cmds.smid = smid;
2178
2179         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
2180         mpi_request->BufferType = buffer_type;
2181         mpi_request->VF_ID = 0; /* TODO */
2182         mpi_request->VP_ID = 0;
2183
2184         init_completion(&ioc->ctl_cmds.done);
2185         ioc->put_smid_default(ioc, smid);
2186         wait_for_completion_timeout(&ioc->ctl_cmds.done,
2187             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2188
2189         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2190                 mpt3sas_check_cmd_timeout(ioc,
2191                     ioc->ctl_cmds.status, mpi_request,
2192                     sizeof(Mpi2DiagReleaseRequest_t)/4, reset_needed);
2193                 *issue_reset = reset_needed;
2194                 rc = -EFAULT;
2195                 goto out;
2196         }
2197
2198         /* process the completed Reply Message Frame */
2199         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2200                 ioc_err(ioc, "%s: no reply message\n", __func__);
2201                 rc = -EFAULT;
2202                 goto out;
2203         }
2204
2205         mpi_reply = ioc->ctl_cmds.reply;
2206         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2207
2208         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2209                 ioc->diag_buffer_status[buffer_type] |=
2210                     MPT3_DIAG_BUFFER_IS_RELEASED;
2211                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2212         } else {
2213                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2214                          __func__,
2215                          ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2216                 rc = -EFAULT;
2217         }
2218
2219  out:
2220         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2221         return rc;
2222 }
2223
2224 /**
2225  * _ctl_diag_release - request to send Diag Release Message to firmware
2226  * @ioc: ?
2227  * @arg: user space buffer containing ioctl content
2228  *
2229  * This allows ownership of the specified buffer to returned to the driver,
2230  * allowing an application to read the buffer without fear that firmware is
2231  * overwriting information in the buffer.
2232  */
2233 static long
2234 _ctl_diag_release(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2235 {
2236         struct mpt3_diag_release karg;
2237         void *request_data;
2238         int rc;
2239         u8 buffer_type;
2240         u8 issue_reset = 0;
2241
2242         if (copy_from_user(&karg, arg, sizeof(karg))) {
2243                 pr_err("failure at %s:%d/%s()!\n",
2244                     __FILE__, __LINE__, __func__);
2245                 return -EFAULT;
2246         }
2247
2248         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2249                                  __func__));
2250
2251         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2252         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2253                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2254                     __func__, karg.unique_id);
2255                 return -EINVAL;
2256         }
2257
2258         if (!_ctl_diag_capability(ioc, buffer_type)) {
2259                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2260                         __func__, buffer_type);
2261                 return -EPERM;
2262         }
2263
2264         if ((ioc->diag_buffer_status[buffer_type] &
2265             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2266                 ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2267                         __func__, buffer_type);
2268                 return -EINVAL;
2269         }
2270
2271         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2272                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2273                         __func__, karg.unique_id);
2274                 return -EINVAL;
2275         }
2276
2277         if (ioc->diag_buffer_status[buffer_type] &
2278             MPT3_DIAG_BUFFER_IS_RELEASED) {
2279                 ioc_err(ioc, "%s: buffer_type(0x%02x) is already released\n",
2280                         __func__, buffer_type);
2281                 return -EINVAL;
2282         }
2283
2284         request_data = ioc->diag_buffer[buffer_type];
2285
2286         if (!request_data) {
2287                 ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
2288                         __func__, buffer_type);
2289                 return -ENOMEM;
2290         }
2291
2292         /* buffers were released by due to host reset */
2293         if ((ioc->diag_buffer_status[buffer_type] &
2294             MPT3_DIAG_BUFFER_IS_DIAG_RESET)) {
2295                 ioc->diag_buffer_status[buffer_type] |=
2296                     MPT3_DIAG_BUFFER_IS_RELEASED;
2297                 ioc->diag_buffer_status[buffer_type] &=
2298                     ~MPT3_DIAG_BUFFER_IS_DIAG_RESET;
2299                 ioc_err(ioc, "%s: buffer_type(0x%02x) was released due to host reset\n",
2300                         __func__, buffer_type);
2301                 return 0;
2302         }
2303
2304         rc = mpt3sas_send_diag_release(ioc, buffer_type, &issue_reset);
2305
2306         if (issue_reset)
2307                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2308
2309         return rc;
2310 }
2311
2312 /**
2313  * _ctl_diag_read_buffer - request for copy of the diag buffer
2314  * @ioc: per adapter object
2315  * @arg: user space buffer containing ioctl content
2316  */
2317 static long
2318 _ctl_diag_read_buffer(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2319 {
2320         struct mpt3_diag_read_buffer karg;
2321         struct mpt3_diag_read_buffer __user *uarg = arg;
2322         void *request_data, *diag_data;
2323         Mpi2DiagBufferPostRequest_t *mpi_request;
2324         Mpi2DiagBufferPostReply_t *mpi_reply;
2325         int rc, i;
2326         u8 buffer_type;
2327         unsigned long request_size, copy_size;
2328         u16 smid;
2329         u16 ioc_status;
2330         u8 issue_reset = 0;
2331
2332         if (copy_from_user(&karg, arg, sizeof(karg))) {
2333                 pr_err("failure at %s:%d/%s()!\n",
2334                     __FILE__, __LINE__, __func__);
2335                 return -EFAULT;
2336         }
2337
2338         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2339                                  __func__));
2340
2341         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2342         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2343                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2344                     __func__, karg.unique_id);
2345                 return -EINVAL;
2346         }
2347
2348         if (!_ctl_diag_capability(ioc, buffer_type)) {
2349                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2350                         __func__, buffer_type);
2351                 return -EPERM;
2352         }
2353
2354         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2355                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2356                         __func__, karg.unique_id);
2357                 return -EINVAL;
2358         }
2359
2360         request_data = ioc->diag_buffer[buffer_type];
2361         if (!request_data) {
2362                 ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2363                         __func__, buffer_type);
2364                 return -ENOMEM;
2365         }
2366
2367         request_size = ioc->diag_buffer_sz[buffer_type];
2368
2369         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
2370                 ioc_err(ioc, "%s: either the starting_offset or bytes_to_read are not 4 byte aligned\n",
2371                         __func__);
2372                 return -EINVAL;
2373         }
2374
2375         if (karg.starting_offset > request_size)
2376                 return -EINVAL;
2377
2378         diag_data = (void *)(request_data + karg.starting_offset);
2379         dctlprintk(ioc,
2380                    ioc_info(ioc, "%s: diag_buffer(%p), offset(%d), sz(%d)\n",
2381                             __func__, diag_data, karg.starting_offset,
2382                             karg.bytes_to_read));
2383
2384         /* Truncate data on requests that are too large */
2385         if ((diag_data + karg.bytes_to_read < diag_data) ||
2386             (diag_data + karg.bytes_to_read > request_data + request_size))
2387                 copy_size = request_size - karg.starting_offset;
2388         else
2389                 copy_size = karg.bytes_to_read;
2390
2391         if (copy_to_user((void __user *)uarg->diagnostic_data,
2392             diag_data, copy_size)) {
2393                 ioc_err(ioc, "%s: Unable to write mpt_diag_read_buffer_t data @ %p\n",
2394                         __func__, diag_data);
2395                 return -EFAULT;
2396         }
2397
2398         if ((karg.flags & MPT3_FLAGS_REREGISTER) == 0)
2399                 return 0;
2400
2401         dctlprintk(ioc,
2402                    ioc_info(ioc, "%s: Reregister buffer_type(0x%02x)\n",
2403                             __func__, buffer_type));
2404         if ((ioc->diag_buffer_status[buffer_type] &
2405             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2406                 dctlprintk(ioc,
2407                            ioc_info(ioc, "%s: buffer_type(0x%02x) is still registered\n",
2408                                     __func__, buffer_type));
2409                 return 0;
2410         }
2411         /* Get a free request frame and save the message context.
2412         */
2413
2414         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2415                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2416                 rc = -EAGAIN;
2417                 goto out;
2418         }
2419
2420         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2421         if (!smid) {
2422                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2423                 rc = -EAGAIN;
2424                 goto out;
2425         }
2426
2427         rc = 0;
2428         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2429         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2430         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2431         memset(mpi_request, 0, ioc->request_sz);
2432         ioc->ctl_cmds.smid = smid;
2433
2434         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2435         mpi_request->BufferType = buffer_type;
2436         mpi_request->BufferLength =
2437             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2438         mpi_request->BufferAddress =
2439             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2440         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2441                 mpi_request->ProductSpecific[i] =
2442                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2443         mpi_request->VF_ID = 0; /* TODO */
2444         mpi_request->VP_ID = 0;
2445
2446         init_completion(&ioc->ctl_cmds.done);
2447         ioc->put_smid_default(ioc, smid);
2448         wait_for_completion_timeout(&ioc->ctl_cmds.done,
2449             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2450
2451         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2452                 mpt3sas_check_cmd_timeout(ioc,
2453                     ioc->ctl_cmds.status, mpi_request,
2454                     sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
2455                 goto issue_host_reset;
2456         }
2457
2458         /* process the completed Reply Message Frame */
2459         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2460                 ioc_err(ioc, "%s: no reply message\n", __func__);
2461                 rc = -EFAULT;
2462                 goto out;
2463         }
2464
2465         mpi_reply = ioc->ctl_cmds.reply;
2466         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2467
2468         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2469                 ioc->diag_buffer_status[buffer_type] |=
2470                     MPT3_DIAG_BUFFER_IS_REGISTERED;
2471                 ioc->diag_buffer_status[buffer_type] &=
2472                     ~MPT3_DIAG_BUFFER_IS_RELEASED;
2473                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2474         } else {
2475                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2476                          __func__, ioc_status,
2477                          le32_to_cpu(mpi_reply->IOCLogInfo));
2478                 rc = -EFAULT;
2479         }
2480
2481  issue_host_reset:
2482         if (issue_reset)
2483                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2484
2485  out:
2486
2487         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2488         return rc;
2489 }
2490
2491 /**
2492  * _ctl_addnl_diag_query - query relevant info associated with diag buffers
2493  * @ioc: per adapter object
2494  * @arg: user space buffer containing ioctl content
2495  *
2496  * The application will send only unique_id.  Driver will
2497  * inspect unique_id first, if valid, fill the details related to cause
2498  * for diag buffer release.
2499  */
2500 static long
2501 _ctl_addnl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2502 {
2503         struct mpt3_addnl_diag_query karg;
2504         u32 buffer_type = 0;
2505
2506         if (copy_from_user(&karg, arg, sizeof(karg))) {
2507                 pr_err("%s: failure at %s:%d/%s()!\n",
2508                     ioc->name, __FILE__, __LINE__, __func__);
2509                 return -EFAULT;
2510         }
2511         dctlprintk(ioc, ioc_info(ioc, "%s\n",  __func__));
2512         if (karg.unique_id == 0) {
2513                 ioc_err(ioc, "%s: unique_id is(0x%08x)\n",
2514                     __func__, karg.unique_id);
2515                 return -EPERM;
2516         }
2517         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2518         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2519                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2520                     __func__, karg.unique_id);
2521                 return -EPERM;
2522         }
2523         memset(&karg.rel_query, 0, sizeof(karg.rel_query));
2524         if ((ioc->diag_buffer_status[buffer_type] &
2525             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2526                 ioc_info(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2527                     __func__, buffer_type);
2528                 goto out;
2529         }
2530         if ((ioc->diag_buffer_status[buffer_type] &
2531             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2532                 ioc_err(ioc, "%s: buffer_type(0x%02x) is not released\n",
2533                     __func__, buffer_type);
2534                 return -EPERM;
2535         }
2536         memcpy(&karg.rel_query, &ioc->htb_rel, sizeof(karg.rel_query));
2537 out:
2538         if (copy_to_user(arg, &karg, sizeof(struct mpt3_addnl_diag_query))) {
2539                 ioc_err(ioc, "%s: unable to write mpt3_addnl_diag_query data @ %p\n",
2540                     __func__, arg);
2541                 return -EFAULT;
2542         }
2543         return 0;
2544 }
2545
2546 #ifdef CONFIG_COMPAT
2547 /**
2548  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2549  * @ioc: per adapter object
2550  * @cmd: ioctl opcode
2551  * @arg: (struct mpt3_ioctl_command32)
2552  *
2553  * MPT3COMMAND32 - Handle 32bit applications running on 64bit os.
2554  */
2555 static long
2556 _ctl_compat_mpt_command(struct MPT3SAS_ADAPTER *ioc, unsigned cmd,
2557         void __user *arg)
2558 {
2559         struct mpt3_ioctl_command32 karg32;
2560         struct mpt3_ioctl_command32 __user *uarg;
2561         struct mpt3_ioctl_command karg;
2562
2563         if (_IOC_SIZE(cmd) != sizeof(struct mpt3_ioctl_command32))
2564                 return -EINVAL;
2565
2566         uarg = (struct mpt3_ioctl_command32 __user *) arg;
2567
2568         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2569                 pr_err("failure at %s:%d/%s()!\n",
2570                     __FILE__, __LINE__, __func__);
2571                 return -EFAULT;
2572         }
2573
2574         memset(&karg, 0, sizeof(struct mpt3_ioctl_command));
2575         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2576         karg.hdr.port_number = karg32.hdr.port_number;
2577         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2578         karg.timeout = karg32.timeout;
2579         karg.max_reply_bytes = karg32.max_reply_bytes;
2580         karg.data_in_size = karg32.data_in_size;
2581         karg.data_out_size = karg32.data_out_size;
2582         karg.max_sense_bytes = karg32.max_sense_bytes;
2583         karg.data_sge_offset = karg32.data_sge_offset;
2584         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2585         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2586         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2587         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2588         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2589 }
2590 #endif
2591
2592 /**
2593  * _ctl_ioctl_main - main ioctl entry point
2594  * @file:  (struct file)
2595  * @cmd:  ioctl opcode
2596  * @arg:  user space data buffer
2597  * @compat:  handles 32 bit applications in 64bit os
2598  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
2599  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
2600  */
2601 static long
2602 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2603         u8 compat, u16 mpi_version)
2604 {
2605         struct MPT3SAS_ADAPTER *ioc;
2606         struct mpt3_ioctl_header ioctl_header;
2607         enum block_state state;
2608         long ret = -ENOIOCTLCMD;
2609
2610         /* get IOCTL header */
2611         if (copy_from_user(&ioctl_header, (char __user *)arg,
2612             sizeof(struct mpt3_ioctl_header))) {
2613                 pr_err("failure at %s:%d/%s()!\n",
2614                     __FILE__, __LINE__, __func__);
2615                 return -EFAULT;
2616         }
2617
2618         if (_ctl_verify_adapter(ioctl_header.ioc_number,
2619                                 &ioc, mpi_version) == -1 || !ioc)
2620                 return -ENODEV;
2621
2622         /* pci_access_mutex lock acquired by ioctl path */
2623         mutex_lock(&ioc->pci_access_mutex);
2624
2625         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2626             ioc->is_driver_loading || ioc->remove_host) {
2627                 ret = -EAGAIN;
2628                 goto out_unlock_pciaccess;
2629         }
2630
2631         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2632         if (state == NON_BLOCKING) {
2633                 if (!mutex_trylock(&ioc->ctl_cmds.mutex)) {
2634                         ret = -EAGAIN;
2635                         goto out_unlock_pciaccess;
2636                 }
2637         } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2638                 ret = -ERESTARTSYS;
2639                 goto out_unlock_pciaccess;
2640         }
2641
2642
2643         switch (cmd) {
2644         case MPT3IOCINFO:
2645                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_iocinfo))
2646                         ret = _ctl_getiocinfo(ioc, arg);
2647                 break;
2648 #ifdef CONFIG_COMPAT
2649         case MPT3COMMAND32:
2650 #endif
2651         case MPT3COMMAND:
2652         {
2653                 struct mpt3_ioctl_command __user *uarg;
2654                 struct mpt3_ioctl_command karg;
2655
2656 #ifdef CONFIG_COMPAT
2657                 if (compat) {
2658                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2659                         break;
2660                 }
2661 #endif
2662                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2663                         pr_err("failure at %s:%d/%s()!\n",
2664                             __FILE__, __LINE__, __func__);
2665                         ret = -EFAULT;
2666                         break;
2667                 }
2668
2669                 if (karg.hdr.ioc_number != ioctl_header.ioc_number) {
2670                         ret = -EINVAL;
2671                         break;
2672                 }
2673                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_command)) {
2674                         uarg = arg;
2675                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2676                 }
2677                 break;
2678         }
2679         case MPT3EVENTQUERY:
2680                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventquery))
2681                         ret = _ctl_eventquery(ioc, arg);
2682                 break;
2683         case MPT3EVENTENABLE:
2684                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventenable))
2685                         ret = _ctl_eventenable(ioc, arg);
2686                 break;
2687         case MPT3EVENTREPORT:
2688                 ret = _ctl_eventreport(ioc, arg);
2689                 break;
2690         case MPT3HARDRESET:
2691                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_diag_reset))
2692                         ret = _ctl_do_reset(ioc, arg);
2693                 break;
2694         case MPT3BTDHMAPPING:
2695                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_btdh_mapping))
2696                         ret = _ctl_btdh_mapping(ioc, arg);
2697                 break;
2698         case MPT3DIAGREGISTER:
2699                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_register))
2700                         ret = _ctl_diag_register(ioc, arg);
2701                 break;
2702         case MPT3DIAGUNREGISTER:
2703                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_unregister))
2704                         ret = _ctl_diag_unregister(ioc, arg);
2705                 break;
2706         case MPT3DIAGQUERY:
2707                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_query))
2708                         ret = _ctl_diag_query(ioc, arg);
2709                 break;
2710         case MPT3DIAGRELEASE:
2711                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_release))
2712                         ret = _ctl_diag_release(ioc, arg);
2713                 break;
2714         case MPT3DIAGREADBUFFER:
2715                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_read_buffer))
2716                         ret = _ctl_diag_read_buffer(ioc, arg);
2717                 break;
2718         case MPT3ADDNLDIAGQUERY:
2719                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_addnl_diag_query))
2720                         ret = _ctl_addnl_diag_query(ioc, arg);
2721                 break;
2722         default:
2723                 dctlprintk(ioc,
2724                            ioc_info(ioc, "unsupported ioctl opcode(0x%08x)\n",
2725                                     cmd));
2726                 break;
2727         }
2728
2729         mutex_unlock(&ioc->ctl_cmds.mutex);
2730 out_unlock_pciaccess:
2731         mutex_unlock(&ioc->pci_access_mutex);
2732         return ret;
2733 }
2734
2735 /**
2736  * _ctl_ioctl - mpt3ctl main ioctl entry point (unlocked)
2737  * @file: (struct file)
2738  * @cmd: ioctl opcode
2739  * @arg: ?
2740  */
2741 static long
2742 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2743 {
2744         long ret;
2745
2746         /* pass MPI25_VERSION | MPI26_VERSION value,
2747          * to indicate that this ioctl cmd
2748          * came from mpt3ctl ioctl device.
2749          */
2750         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0,
2751                 MPI25_VERSION | MPI26_VERSION);
2752         return ret;
2753 }
2754
2755 /**
2756  * _ctl_mpt2_ioctl - mpt2ctl main ioctl entry point (unlocked)
2757  * @file: (struct file)
2758  * @cmd: ioctl opcode
2759  * @arg: ?
2760  */
2761 static long
2762 _ctl_mpt2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2763 {
2764         long ret;
2765
2766         /* pass MPI2_VERSION value, to indicate that this ioctl cmd
2767          * came from mpt2ctl ioctl device.
2768          */
2769         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI2_VERSION);
2770         return ret;
2771 }
2772 #ifdef CONFIG_COMPAT
2773 /**
2774  * _ctl_ioctl_compat - main ioctl entry point (compat)
2775  * @file: ?
2776  * @cmd: ?
2777  * @arg: ?
2778  *
2779  * This routine handles 32 bit applications in 64bit os.
2780  */
2781 static long
2782 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2783 {
2784         long ret;
2785
2786         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1,
2787                 MPI25_VERSION | MPI26_VERSION);
2788         return ret;
2789 }
2790
2791 /**
2792  * _ctl_mpt2_ioctl_compat - main ioctl entry point (compat)
2793  * @file: ?
2794  * @cmd: ?
2795  * @arg: ?
2796  *
2797  * This routine handles 32 bit applications in 64bit os.
2798  */
2799 static long
2800 _ctl_mpt2_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2801 {
2802         long ret;
2803
2804         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI2_VERSION);
2805         return ret;
2806 }
2807 #endif
2808
2809 /* scsi host attributes */
2810 /**
2811  * version_fw_show - firmware version
2812  * @cdev: pointer to embedded class device
2813  * @attr: ?
2814  * @buf: the buffer returned
2815  *
2816  * A sysfs 'read-only' shost attribute.
2817  */
2818 static ssize_t
2819 version_fw_show(struct device *cdev, struct device_attribute *attr,
2820         char *buf)
2821 {
2822         struct Scsi_Host *shost = class_to_shost(cdev);
2823         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2824
2825         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2826             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2827             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2828             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2829             ioc->facts.FWVersion.Word & 0x000000FF);
2830 }
2831 static DEVICE_ATTR_RO(version_fw);
2832
2833 /**
2834  * version_bios_show - bios version
2835  * @cdev: pointer to embedded class device
2836  * @attr: ?
2837  * @buf: the buffer returned
2838  *
2839  * A sysfs 'read-only' shost attribute.
2840  */
2841 static ssize_t
2842 version_bios_show(struct device *cdev, struct device_attribute *attr,
2843         char *buf)
2844 {
2845         struct Scsi_Host *shost = class_to_shost(cdev);
2846         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2847
2848         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2849
2850         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2851             (version & 0xFF000000) >> 24,
2852             (version & 0x00FF0000) >> 16,
2853             (version & 0x0000FF00) >> 8,
2854             version & 0x000000FF);
2855 }
2856 static DEVICE_ATTR_RO(version_bios);
2857
2858 /**
2859  * version_mpi_show - MPI (message passing interface) version
2860  * @cdev: pointer to embedded class device
2861  * @attr: ?
2862  * @buf: the buffer returned
2863  *
2864  * A sysfs 'read-only' shost attribute.
2865  */
2866 static ssize_t
2867 version_mpi_show(struct device *cdev, struct device_attribute *attr,
2868         char *buf)
2869 {
2870         struct Scsi_Host *shost = class_to_shost(cdev);
2871         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2872
2873         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2874             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2875 }
2876 static DEVICE_ATTR_RO(version_mpi);
2877
2878 /**
2879  * version_product_show - product name
2880  * @cdev: pointer to embedded class device
2881  * @attr: ?
2882  * @buf: the buffer returned
2883  *
2884  * A sysfs 'read-only' shost attribute.
2885  */
2886 static ssize_t
2887 version_product_show(struct device *cdev, struct device_attribute *attr,
2888         char *buf)
2889 {
2890         struct Scsi_Host *shost = class_to_shost(cdev);
2891         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2892
2893         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2894 }
2895 static DEVICE_ATTR_RO(version_product);
2896
2897 /**
2898  * version_nvdata_persistent_show - ndvata persistent version
2899  * @cdev: pointer to embedded class device
2900  * @attr: ?
2901  * @buf: the buffer returned
2902  *
2903  * A sysfs 'read-only' shost attribute.
2904  */
2905 static ssize_t
2906 version_nvdata_persistent_show(struct device *cdev,
2907         struct device_attribute *attr, char *buf)
2908 {
2909         struct Scsi_Host *shost = class_to_shost(cdev);
2910         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2911
2912         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2913             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2914 }
2915 static DEVICE_ATTR_RO(version_nvdata_persistent);
2916
2917 /**
2918  * version_nvdata_default_show - nvdata default version
2919  * @cdev: pointer to embedded class device
2920  * @attr: ?
2921  * @buf: the buffer returned
2922  *
2923  * A sysfs 'read-only' shost attribute.
2924  */
2925 static ssize_t
2926 version_nvdata_default_show(struct device *cdev, struct device_attribute
2927         *attr, char *buf)
2928 {
2929         struct Scsi_Host *shost = class_to_shost(cdev);
2930         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2931
2932         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2933             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2934 }
2935 static DEVICE_ATTR_RO(version_nvdata_default);
2936
2937 /**
2938  * board_name_show - board name
2939  * @cdev: pointer to embedded class device
2940  * @attr: ?
2941  * @buf: the buffer returned
2942  *
2943  * A sysfs 'read-only' shost attribute.
2944  */
2945 static ssize_t
2946 board_name_show(struct device *cdev, struct device_attribute *attr,
2947         char *buf)
2948 {
2949         struct Scsi_Host *shost = class_to_shost(cdev);
2950         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2951
2952         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2953 }
2954 static DEVICE_ATTR_RO(board_name);
2955
2956 /**
2957  * board_assembly_show - board assembly name
2958  * @cdev: pointer to embedded class device
2959  * @attr: ?
2960  * @buf: the buffer returned
2961  *
2962  * A sysfs 'read-only' shost attribute.
2963  */
2964 static ssize_t
2965 board_assembly_show(struct device *cdev, struct device_attribute *attr,
2966         char *buf)
2967 {
2968         struct Scsi_Host *shost = class_to_shost(cdev);
2969         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2970
2971         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2972 }
2973 static DEVICE_ATTR_RO(board_assembly);
2974
2975 /**
2976  * board_tracer_show - board tracer number
2977  * @cdev: pointer to embedded class device
2978  * @attr: ?
2979  * @buf: the buffer returned
2980  *
2981  * A sysfs 'read-only' shost attribute.
2982  */
2983 static ssize_t
2984 board_tracer_show(struct device *cdev, struct device_attribute *attr,
2985         char *buf)
2986 {
2987         struct Scsi_Host *shost = class_to_shost(cdev);
2988         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2989
2990         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2991 }
2992 static DEVICE_ATTR_RO(board_tracer);
2993
2994 /**
2995  * io_delay_show - io missing delay
2996  * @cdev: pointer to embedded class device
2997  * @attr: ?
2998  * @buf: the buffer returned
2999  *
3000  * This is for firmware implemention for deboucing device
3001  * removal events.
3002  *
3003  * A sysfs 'read-only' shost attribute.
3004  */
3005 static ssize_t
3006 io_delay_show(struct device *cdev, struct device_attribute *attr,
3007         char *buf)
3008 {
3009         struct Scsi_Host *shost = class_to_shost(cdev);
3010         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3011
3012         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
3013 }
3014 static DEVICE_ATTR_RO(io_delay);
3015
3016 /**
3017  * device_delay_show - device missing delay
3018  * @cdev: pointer to embedded class device
3019  * @attr: ?
3020  * @buf: the buffer returned
3021  *
3022  * This is for firmware implemention for deboucing device
3023  * removal events.
3024  *
3025  * A sysfs 'read-only' shost attribute.
3026  */
3027 static ssize_t
3028 device_delay_show(struct device *cdev, struct device_attribute *attr,
3029         char *buf)
3030 {
3031         struct Scsi_Host *shost = class_to_shost(cdev);
3032         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3033
3034         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
3035 }
3036 static DEVICE_ATTR_RO(device_delay);
3037
3038 /**
3039  * fw_queue_depth_show - global credits
3040  * @cdev: pointer to embedded class device
3041  * @attr: ?
3042  * @buf: the buffer returned
3043  *
3044  * This is firmware queue depth limit
3045  *
3046  * A sysfs 'read-only' shost attribute.
3047  */
3048 static ssize_t
3049 fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
3050         char *buf)
3051 {
3052         struct Scsi_Host *shost = class_to_shost(cdev);
3053         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3054
3055         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
3056 }
3057 static DEVICE_ATTR_RO(fw_queue_depth);
3058
3059 /**
3060  * host_sas_address_show - sas address
3061  * @cdev: pointer to embedded class device
3062  * @attr: ?
3063  * @buf: the buffer returned
3064  *
3065  * This is the controller sas address
3066  *
3067  * A sysfs 'read-only' shost attribute.
3068  */
3069 static ssize_t
3070 host_sas_address_show(struct device *cdev, struct device_attribute *attr,
3071         char *buf)
3072
3073 {
3074         struct Scsi_Host *shost = class_to_shost(cdev);
3075         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3076
3077         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3078             (unsigned long long)ioc->sas_hba.sas_address);
3079 }
3080 static DEVICE_ATTR_RO(host_sas_address);
3081
3082 /**
3083  * logging_level_show - logging level
3084  * @cdev: pointer to embedded class device
3085  * @attr: ?
3086  * @buf: the buffer returned
3087  *
3088  * A sysfs 'read/write' shost attribute.
3089  */
3090 static ssize_t
3091 logging_level_show(struct device *cdev, struct device_attribute *attr,
3092         char *buf)
3093 {
3094         struct Scsi_Host *shost = class_to_shost(cdev);
3095         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3096
3097         return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
3098 }
3099 static ssize_t
3100 logging_level_store(struct device *cdev, struct device_attribute *attr,
3101         const char *buf, size_t count)
3102 {
3103         struct Scsi_Host *shost = class_to_shost(cdev);
3104         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3105         int val = 0;
3106
3107         if (sscanf(buf, "%x", &val) != 1)
3108                 return -EINVAL;
3109
3110         ioc->logging_level = val;
3111         ioc_info(ioc, "logging_level=%08xh\n",
3112                  ioc->logging_level);
3113         return strlen(buf);
3114 }
3115 static DEVICE_ATTR_RW(logging_level);
3116
3117 /**
3118  * fwfault_debug_show - show/store fwfault_debug
3119  * @cdev: pointer to embedded class device
3120  * @attr: ?
3121  * @buf: the buffer returned
3122  *
3123  * mpt3sas_fwfault_debug is command line option
3124  * A sysfs 'read/write' shost attribute.
3125  */
3126 static ssize_t
3127 fwfault_debug_show(struct device *cdev, struct device_attribute *attr,
3128         char *buf)
3129 {
3130         struct Scsi_Host *shost = class_to_shost(cdev);
3131         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3132
3133         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
3134 }
3135 static ssize_t
3136 fwfault_debug_store(struct device *cdev, struct device_attribute *attr,
3137         const char *buf, size_t count)
3138 {
3139         struct Scsi_Host *shost = class_to_shost(cdev);
3140         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3141         int val = 0;
3142
3143         if (sscanf(buf, "%d", &val) != 1)
3144                 return -EINVAL;
3145
3146         ioc->fwfault_debug = val;
3147         ioc_info(ioc, "fwfault_debug=%d\n",
3148                  ioc->fwfault_debug);
3149         return strlen(buf);
3150 }
3151 static DEVICE_ATTR_RW(fwfault_debug);
3152
3153 /**
3154  * ioc_reset_count_show - ioc reset count
3155  * @cdev: pointer to embedded class device
3156  * @attr: ?
3157  * @buf: the buffer returned
3158  *
3159  * This is firmware queue depth limit
3160  *
3161  * A sysfs 'read-only' shost attribute.
3162  */
3163 static ssize_t
3164 ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
3165         char *buf)
3166 {
3167         struct Scsi_Host *shost = class_to_shost(cdev);
3168         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3169
3170         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->ioc_reset_count);
3171 }
3172 static DEVICE_ATTR_RO(ioc_reset_count);
3173
3174 /**
3175  * reply_queue_count_show - number of reply queues
3176  * @cdev: pointer to embedded class device
3177  * @attr: ?
3178  * @buf: the buffer returned
3179  *
3180  * This is number of reply queues
3181  *
3182  * A sysfs 'read-only' shost attribute.
3183  */
3184 static ssize_t
3185 reply_queue_count_show(struct device *cdev,
3186         struct device_attribute *attr, char *buf)
3187 {
3188         u8 reply_queue_count;
3189         struct Scsi_Host *shost = class_to_shost(cdev);
3190         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3191
3192         if ((ioc->facts.IOCCapabilities &
3193             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
3194                 reply_queue_count = ioc->reply_queue_count;
3195         else
3196                 reply_queue_count = 1;
3197
3198         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
3199 }
3200 static DEVICE_ATTR_RO(reply_queue_count);
3201
3202 /**
3203  * BRM_status_show - Backup Rail Monitor Status
3204  * @cdev: pointer to embedded class device
3205  * @attr: ?
3206  * @buf: the buffer returned
3207  *
3208  * This is number of reply queues
3209  *
3210  * A sysfs 'read-only' shost attribute.
3211  */
3212 static ssize_t
3213 BRM_status_show(struct device *cdev, struct device_attribute *attr,
3214         char *buf)
3215 {
3216         struct Scsi_Host *shost = class_to_shost(cdev);
3217         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3218         Mpi2IOUnitPage3_t io_unit_pg3;
3219         Mpi2ConfigReply_t mpi_reply;
3220         u16 backup_rail_monitor_status = 0;
3221         u16 ioc_status;
3222         int sz;
3223         ssize_t rc = 0;
3224
3225         if (!ioc->is_warpdrive) {
3226                 ioc_err(ioc, "%s: BRM attribute is only for warpdrive\n",
3227                         __func__);
3228                 return 0;
3229         }
3230         /* pci_access_mutex lock acquired by sysfs show path */
3231         mutex_lock(&ioc->pci_access_mutex);
3232         if (ioc->pci_error_recovery || ioc->remove_host)
3233                 goto out;
3234
3235         sz = sizeof(io_unit_pg3);
3236         memset(&io_unit_pg3, 0, sz);
3237
3238         if (mpt3sas_config_get_iounit_pg3(ioc, &mpi_reply, &io_unit_pg3, sz) !=
3239             0) {
3240                 ioc_err(ioc, "%s: failed reading iounit_pg3\n",
3241                         __func__);
3242                 rc = -EINVAL;
3243                 goto out;
3244         }
3245
3246         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
3247         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
3248                 ioc_err(ioc, "%s: iounit_pg3 failed with ioc_status(0x%04x)\n",
3249                         __func__, ioc_status);
3250                 rc = -EINVAL;
3251                 goto out;
3252         }
3253
3254         if (io_unit_pg3.GPIOCount < 25) {
3255                 ioc_err(ioc, "%s: iounit_pg3.GPIOCount less than 25 entries, detected (%d) entries\n",
3256                         __func__, io_unit_pg3.GPIOCount);
3257                 rc = -EINVAL;
3258                 goto out;
3259         }
3260
3261         /* BRM status is in bit zero of GPIOVal[24] */
3262         backup_rail_monitor_status = le16_to_cpu(io_unit_pg3.GPIOVal[24]);
3263         rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
3264
3265  out:
3266         mutex_unlock(&ioc->pci_access_mutex);
3267         return rc;
3268 }
3269 static DEVICE_ATTR_RO(BRM_status);
3270
3271 struct DIAG_BUFFER_START {
3272         __le32  Size;
3273         __le32  DiagVersion;
3274         u8      BufferType;
3275         u8      Reserved[3];
3276         __le32  Reserved1;
3277         __le32  Reserved2;
3278         __le32  Reserved3;
3279 };
3280
3281 /**
3282  * host_trace_buffer_size_show - host buffer size (trace only)
3283  * @cdev: pointer to embedded class device
3284  * @attr: ?
3285  * @buf: the buffer returned
3286  *
3287  * A sysfs 'read-only' shost attribute.
3288  */
3289 static ssize_t
3290 host_trace_buffer_size_show(struct device *cdev,
3291         struct device_attribute *attr, char *buf)
3292 {
3293         struct Scsi_Host *shost = class_to_shost(cdev);
3294         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3295         u32 size = 0;
3296         struct DIAG_BUFFER_START *request_data;
3297
3298         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3299                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3300                         __func__);
3301                 return 0;
3302         }
3303
3304         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3305             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3306                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3307                         __func__);
3308                 return 0;
3309         }
3310
3311         request_data = (struct DIAG_BUFFER_START *)
3312             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
3313         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
3314             le32_to_cpu(request_data->DiagVersion) == 0x01000000 ||
3315             le32_to_cpu(request_data->DiagVersion) == 0x01010000) &&
3316             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
3317                 size = le32_to_cpu(request_data->Size);
3318
3319         ioc->ring_buffer_sz = size;
3320         return snprintf(buf, PAGE_SIZE, "%d\n", size);
3321 }
3322 static DEVICE_ATTR_RO(host_trace_buffer_size);
3323
3324 /**
3325  * host_trace_buffer_show - firmware ring buffer (trace only)
3326  * @cdev: pointer to embedded class device
3327  * @attr: ?
3328  * @buf: the buffer returned
3329  *
3330  * A sysfs 'read/write' shost attribute.
3331  *
3332  * You will only be able to read 4k bytes of ring buffer at a time.
3333  * In order to read beyond 4k bytes, you will have to write out the
3334  * offset to the same attribute, it will move the pointer.
3335  */
3336 static ssize_t
3337 host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
3338         char *buf)
3339 {
3340         struct Scsi_Host *shost = class_to_shost(cdev);
3341         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3342         void *request_data;
3343         u32 size;
3344
3345         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3346                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3347                         __func__);
3348                 return 0;
3349         }
3350
3351         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3352             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3353                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3354                         __func__);
3355                 return 0;
3356         }
3357
3358         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
3359                 return 0;
3360
3361         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
3362         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
3363         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
3364         memcpy(buf, request_data, size);
3365         return size;
3366 }
3367
3368 static ssize_t
3369 host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
3370         const char *buf, size_t count)
3371 {
3372         struct Scsi_Host *shost = class_to_shost(cdev);
3373         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3374         int val = 0;
3375
3376         if (sscanf(buf, "%d", &val) != 1)
3377                 return -EINVAL;
3378
3379         ioc->ring_buffer_offset = val;
3380         return strlen(buf);
3381 }
3382 static DEVICE_ATTR_RW(host_trace_buffer);
3383
3384
3385 /*****************************************/
3386
3387 /**
3388  * host_trace_buffer_enable_show - firmware ring buffer (trace only)
3389  * @cdev: pointer to embedded class device
3390  * @attr: ?
3391  * @buf: the buffer returned
3392  *
3393  * A sysfs 'read/write' shost attribute.
3394  *
3395  * This is a mechnism to post/release host_trace_buffers
3396  */
3397 static ssize_t
3398 host_trace_buffer_enable_show(struct device *cdev,
3399         struct device_attribute *attr, char *buf)
3400 {
3401         struct Scsi_Host *shost = class_to_shost(cdev);
3402         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3403
3404         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
3405            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3406             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0))
3407                 return snprintf(buf, PAGE_SIZE, "off\n");
3408         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3409             MPT3_DIAG_BUFFER_IS_RELEASED))
3410                 return snprintf(buf, PAGE_SIZE, "release\n");
3411         else
3412                 return snprintf(buf, PAGE_SIZE, "post\n");
3413 }
3414
3415 static ssize_t
3416 host_trace_buffer_enable_store(struct device *cdev,
3417         struct device_attribute *attr, const char *buf, size_t count)
3418 {
3419         struct Scsi_Host *shost = class_to_shost(cdev);
3420         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3421         char str[10] = "";
3422         struct mpt3_diag_register diag_register;
3423         u8 issue_reset = 0;
3424
3425         /* don't allow post/release occurr while recovery is active */
3426         if (ioc->shost_recovery || ioc->remove_host ||
3427             ioc->pci_error_recovery || ioc->is_driver_loading)
3428                 return -EBUSY;
3429
3430         if (sscanf(buf, "%9s", str) != 1)
3431                 return -EINVAL;
3432
3433         if (!strcmp(str, "post")) {
3434                 /* exit out if host buffers are already posted */
3435                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
3436                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3437                     MPT3_DIAG_BUFFER_IS_REGISTERED) &&
3438                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3439                     MPT3_DIAG_BUFFER_IS_RELEASED) == 0))
3440                         goto out;
3441                 memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
3442                 ioc_info(ioc, "posting host trace buffers\n");
3443                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
3444
3445                 if (ioc->manu_pg11.HostTraceBufferMaxSizeKB != 0 &&
3446                     ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0) {
3447                         /* post the same buffer allocated previously */
3448                         diag_register.requested_buffer_size =
3449                             ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE];
3450                 } else {
3451                         /*
3452                          * Free the diag buffer memory which was previously
3453                          * allocated by an application.
3454                          */
3455                         if ((ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0)
3456                             &&
3457                             (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3458                             MPT3_DIAG_BUFFER_IS_APP_OWNED)) {
3459                                 dma_free_coherent(&ioc->pdev->dev,
3460                                                   ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE],
3461                                                   ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE],
3462                                                   ioc->diag_buffer_dma[MPI2_DIAG_BUF_TYPE_TRACE]);
3463                                 ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE] =
3464                                     NULL;
3465                         }
3466
3467                         diag_register.requested_buffer_size = (1024 * 1024);
3468                 }
3469
3470                 diag_register.unique_id =
3471                     (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
3472                     (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
3473                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
3474                 _ctl_diag_register_2(ioc,  &diag_register);
3475                 if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3476                     MPT3_DIAG_BUFFER_IS_REGISTERED) {
3477                         ioc_info(ioc,
3478                             "Trace buffer %d KB allocated through sysfs\n",
3479                             diag_register.requested_buffer_size>>10);
3480                         if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
3481                                 ioc->diag_buffer_status[
3482                                     MPI2_DIAG_BUF_TYPE_TRACE] |=
3483                                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
3484                 }
3485         } else if (!strcmp(str, "release")) {
3486                 /* exit out if host buffers are already released */
3487                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
3488                         goto out;
3489                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3490                     MPT3_DIAG_BUFFER_IS_REGISTERED) == 0)
3491                         goto out;
3492                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3493                     MPT3_DIAG_BUFFER_IS_RELEASED))
3494                         goto out;
3495                 ioc_info(ioc, "releasing host trace buffer\n");
3496                 ioc->htb_rel.buffer_rel_condition = MPT3_DIAG_BUFFER_REL_SYSFS;
3497                 mpt3sas_send_diag_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE,
3498                     &issue_reset);
3499         }
3500
3501  out:
3502         return strlen(buf);
3503 }
3504 static DEVICE_ATTR_RW(host_trace_buffer_enable);
3505
3506 /*********** diagnostic trigger suppport *********************************/
3507
3508 /**
3509  * diag_trigger_master_show - show the diag_trigger_master attribute
3510  * @cdev: pointer to embedded class device
3511  * @attr: ?
3512  * @buf: the buffer returned
3513  *
3514  * A sysfs 'read/write' shost attribute.
3515  */
3516 static ssize_t
3517 diag_trigger_master_show(struct device *cdev,
3518         struct device_attribute *attr, char *buf)
3519
3520 {
3521         struct Scsi_Host *shost = class_to_shost(cdev);
3522         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3523         unsigned long flags;
3524         ssize_t rc;
3525
3526         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3527         rc = sizeof(struct SL_WH_MASTER_TRIGGER_T);
3528         memcpy(buf, &ioc->diag_trigger_master, rc);
3529         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3530         return rc;
3531 }
3532
3533 /**
3534  * diag_trigger_master_store - store the diag_trigger_master attribute
3535  * @cdev: pointer to embedded class device
3536  * @attr: ?
3537  * @buf: the buffer returned
3538  * @count: ?
3539  *
3540  * A sysfs 'read/write' shost attribute.
3541  */
3542 static ssize_t
3543 diag_trigger_master_store(struct device *cdev,
3544         struct device_attribute *attr, const char *buf, size_t count)
3545
3546 {
3547         struct Scsi_Host *shost = class_to_shost(cdev);
3548         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3549         struct SL_WH_MASTER_TRIGGER_T *master_tg;
3550         unsigned long flags;
3551         ssize_t rc;
3552         bool set = 1;
3553
3554         rc = min(sizeof(struct SL_WH_MASTER_TRIGGER_T), count);
3555
3556         if (ioc->supports_trigger_pages) {
3557                 master_tg = kzalloc(sizeof(struct SL_WH_MASTER_TRIGGER_T),
3558                     GFP_KERNEL);
3559                 if (!master_tg)
3560                         return -ENOMEM;
3561
3562                 memcpy(master_tg, buf, rc);
3563                 if (!master_tg->MasterData)
3564                         set = 0;
3565                 if (mpt3sas_config_update_driver_trigger_pg1(ioc, master_tg,
3566                     set)) {
3567                         kfree(master_tg);
3568                         return -EFAULT;
3569                 }
3570                 kfree(master_tg);
3571         }
3572
3573         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3574         memset(&ioc->diag_trigger_master, 0,
3575             sizeof(struct SL_WH_MASTER_TRIGGER_T));
3576         memcpy(&ioc->diag_trigger_master, buf, rc);
3577         ioc->diag_trigger_master.MasterData |=
3578             (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
3579         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3580         return rc;
3581 }
3582 static DEVICE_ATTR_RW(diag_trigger_master);
3583
3584
3585 /**
3586  * diag_trigger_event_show - show the diag_trigger_event attribute
3587  * @cdev: pointer to embedded class device
3588  * @attr: ?
3589  * @buf: the buffer returned
3590  *
3591  * A sysfs 'read/write' shost attribute.
3592  */
3593 static ssize_t
3594 diag_trigger_event_show(struct device *cdev,
3595         struct device_attribute *attr, char *buf)
3596 {
3597         struct Scsi_Host *shost = class_to_shost(cdev);
3598         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3599         unsigned long flags;
3600         ssize_t rc;
3601
3602         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3603         rc = sizeof(struct SL_WH_EVENT_TRIGGERS_T);
3604         memcpy(buf, &ioc->diag_trigger_event, rc);
3605         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3606         return rc;
3607 }
3608
3609 /**
3610  * diag_trigger_event_store - store the diag_trigger_event attribute
3611  * @cdev: pointer to embedded class device
3612  * @attr: ?
3613  * @buf: the buffer returned
3614  * @count: ?
3615  *
3616  * A sysfs 'read/write' shost attribute.
3617  */
3618 static ssize_t
3619 diag_trigger_event_store(struct device *cdev,
3620         struct device_attribute *attr, const char *buf, size_t count)
3621
3622 {
3623         struct Scsi_Host *shost = class_to_shost(cdev);
3624         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3625         struct SL_WH_EVENT_TRIGGERS_T *event_tg;
3626         unsigned long flags;
3627         ssize_t sz;
3628         bool set = 1;
3629
3630         sz = min(sizeof(struct SL_WH_EVENT_TRIGGERS_T), count);
3631         if (ioc->supports_trigger_pages) {
3632                 event_tg = kzalloc(sizeof(struct SL_WH_EVENT_TRIGGERS_T),
3633                     GFP_KERNEL);
3634                 if (!event_tg)
3635                         return -ENOMEM;
3636
3637                 memcpy(event_tg, buf, sz);
3638                 if (!event_tg->ValidEntries)
3639                         set = 0;
3640                 if (mpt3sas_config_update_driver_trigger_pg2(ioc, event_tg,
3641                     set)) {
3642                         kfree(event_tg);
3643                         return -EFAULT;
3644                 }
3645                 kfree(event_tg);
3646         }
3647
3648         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3649
3650         memset(&ioc->diag_trigger_event, 0,
3651             sizeof(struct SL_WH_EVENT_TRIGGERS_T));
3652         memcpy(&ioc->diag_trigger_event, buf, sz);
3653         if (ioc->diag_trigger_event.ValidEntries > NUM_VALID_ENTRIES)
3654                 ioc->diag_trigger_event.ValidEntries = NUM_VALID_ENTRIES;
3655         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3656         return sz;
3657 }
3658 static DEVICE_ATTR_RW(diag_trigger_event);
3659
3660
3661 /**
3662  * diag_trigger_scsi_show - show the diag_trigger_scsi attribute
3663  * @cdev: pointer to embedded class device
3664  * @attr: ?
3665  * @buf: the buffer returned
3666  *
3667  * A sysfs 'read/write' shost attribute.
3668  */
3669 static ssize_t
3670 diag_trigger_scsi_show(struct device *cdev,
3671         struct device_attribute *attr, char *buf)
3672 {
3673         struct Scsi_Host *shost = class_to_shost(cdev);
3674         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3675         unsigned long flags;
3676         ssize_t rc;
3677
3678         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3679         rc = sizeof(struct SL_WH_SCSI_TRIGGERS_T);
3680         memcpy(buf, &ioc->diag_trigger_scsi, rc);
3681         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3682         return rc;
3683 }
3684
3685 /**
3686  * diag_trigger_scsi_store - store the diag_trigger_scsi attribute
3687  * @cdev: pointer to embedded class device
3688  * @attr: ?
3689  * @buf: the buffer returned
3690  * @count: ?
3691  *
3692  * A sysfs 'read/write' shost attribute.
3693  */
3694 static ssize_t
3695 diag_trigger_scsi_store(struct device *cdev,
3696         struct device_attribute *attr, const char *buf, size_t count)
3697 {
3698         struct Scsi_Host *shost = class_to_shost(cdev);
3699         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3700         struct SL_WH_SCSI_TRIGGERS_T *scsi_tg;
3701         unsigned long flags;
3702         ssize_t sz;
3703         bool set = 1;
3704
3705         sz = min(sizeof(struct SL_WH_SCSI_TRIGGERS_T), count);
3706         if (ioc->supports_trigger_pages) {
3707                 scsi_tg = kzalloc(sizeof(struct SL_WH_SCSI_TRIGGERS_T),
3708                     GFP_KERNEL);
3709                 if (!scsi_tg)
3710                         return -ENOMEM;
3711
3712                 memcpy(scsi_tg, buf, sz);
3713                 if (!scsi_tg->ValidEntries)
3714                         set = 0;
3715                 if (mpt3sas_config_update_driver_trigger_pg3(ioc, scsi_tg,
3716                     set)) {
3717                         kfree(scsi_tg);
3718                         return -EFAULT;
3719                 }
3720                 kfree(scsi_tg);
3721         }
3722
3723         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3724
3725         memset(&ioc->diag_trigger_scsi, 0, sizeof(ioc->diag_trigger_scsi));
3726         memcpy(&ioc->diag_trigger_scsi, buf, sz);
3727         if (ioc->diag_trigger_scsi.ValidEntries > NUM_VALID_ENTRIES)
3728                 ioc->diag_trigger_scsi.ValidEntries = NUM_VALID_ENTRIES;
3729         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3730         return sz;
3731 }
3732 static DEVICE_ATTR_RW(diag_trigger_scsi);
3733
3734
3735 /**
3736  * diag_trigger_mpi_show - show the diag_trigger_mpi attribute
3737  * @cdev: pointer to embedded class device
3738  * @attr: ?
3739  * @buf: the buffer returned
3740  *
3741  * A sysfs 'read/write' shost attribute.
3742  */
3743 static ssize_t
3744 diag_trigger_mpi_show(struct device *cdev,
3745         struct device_attribute *attr, char *buf)
3746 {
3747         struct Scsi_Host *shost = class_to_shost(cdev);
3748         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3749         unsigned long flags;
3750         ssize_t rc;
3751
3752         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3753         rc = sizeof(struct SL_WH_MPI_TRIGGERS_T);
3754         memcpy(buf, &ioc->diag_trigger_mpi, rc);
3755         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3756         return rc;
3757 }
3758
3759 /**
3760  * diag_trigger_mpi_store - store the diag_trigger_mpi attribute
3761  * @cdev: pointer to embedded class device
3762  * @attr: ?
3763  * @buf: the buffer returned
3764  * @count: ?
3765  *
3766  * A sysfs 'read/write' shost attribute.
3767  */
3768 static ssize_t
3769 diag_trigger_mpi_store(struct device *cdev,
3770         struct device_attribute *attr, const char *buf, size_t count)
3771 {
3772         struct Scsi_Host *shost = class_to_shost(cdev);
3773         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3774         struct SL_WH_MPI_TRIGGERS_T *mpi_tg;
3775         unsigned long flags;
3776         ssize_t sz;
3777         bool set = 1;
3778
3779         sz = min(sizeof(struct SL_WH_MPI_TRIGGERS_T), count);
3780         if (ioc->supports_trigger_pages) {
3781                 mpi_tg = kzalloc(sizeof(struct SL_WH_MPI_TRIGGERS_T),
3782                     GFP_KERNEL);
3783                 if (!mpi_tg)
3784                         return -ENOMEM;
3785
3786                 memcpy(mpi_tg, buf, sz);
3787                 if (!mpi_tg->ValidEntries)
3788                         set = 0;
3789                 if (mpt3sas_config_update_driver_trigger_pg4(ioc, mpi_tg,
3790                     set)) {
3791                         kfree(mpi_tg);
3792                         return -EFAULT;
3793                 }
3794                 kfree(mpi_tg);
3795         }
3796
3797         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3798         memset(&ioc->diag_trigger_mpi, 0,
3799             sizeof(ioc->diag_trigger_mpi));
3800         memcpy(&ioc->diag_trigger_mpi, buf, sz);
3801         if (ioc->diag_trigger_mpi.ValidEntries > NUM_VALID_ENTRIES)
3802                 ioc->diag_trigger_mpi.ValidEntries = NUM_VALID_ENTRIES;
3803         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3804         return sz;
3805 }
3806
3807 static DEVICE_ATTR_RW(diag_trigger_mpi);
3808
3809 /*********** diagnostic trigger suppport *** END ****************************/
3810
3811 /*****************************************/
3812
3813 /**
3814  * drv_support_bitmap_show - driver supported feature bitmap
3815  * @cdev: pointer to embedded class device
3816  * @attr: unused
3817  * @buf: the buffer returned
3818  *
3819  * A sysfs 'read-only' shost attribute.
3820  */
3821 static ssize_t
3822 drv_support_bitmap_show(struct device *cdev,
3823         struct device_attribute *attr, char *buf)
3824 {
3825         struct Scsi_Host *shost = class_to_shost(cdev);
3826         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3827
3828         return snprintf(buf, PAGE_SIZE, "0x%08x\n", ioc->drv_support_bitmap);
3829 }
3830 static DEVICE_ATTR_RO(drv_support_bitmap);
3831
3832 /**
3833  * enable_sdev_max_qd_show - display whether sdev max qd is enabled/disabled
3834  * @cdev: pointer to embedded class device
3835  * @attr: unused
3836  * @buf: the buffer returned
3837  *
3838  * A sysfs read/write shost attribute. This attribute is used to set the
3839  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3840  */
3841 static ssize_t
3842 enable_sdev_max_qd_show(struct device *cdev,
3843         struct device_attribute *attr, char *buf)
3844 {
3845         struct Scsi_Host *shost = class_to_shost(cdev);
3846         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3847
3848         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->enable_sdev_max_qd);
3849 }
3850
3851 /**
3852  * enable_sdev_max_qd_store - Enable/disable sdev max qd
3853  * @cdev: pointer to embedded class device
3854  * @attr: unused
3855  * @buf: the buffer returned
3856  * @count: unused
3857  *
3858  * A sysfs read/write shost attribute. This attribute is used to set the
3859  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3860  * If this attribute is disabled then targets will have corresponding default
3861  * queue depth.
3862  */
3863 static ssize_t
3864 enable_sdev_max_qd_store(struct device *cdev,
3865         struct device_attribute *attr, const char *buf, size_t count)
3866 {
3867         struct Scsi_Host *shost = class_to_shost(cdev);
3868         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3869         struct MPT3SAS_DEVICE *sas_device_priv_data;
3870         struct MPT3SAS_TARGET *sas_target_priv_data;
3871         int val = 0;
3872         struct scsi_device *sdev;
3873         struct _raid_device *raid_device;
3874         int qdepth;
3875
3876         if (kstrtoint(buf, 0, &val) != 0)
3877                 return -EINVAL;
3878
3879         switch (val) {
3880         case 0:
3881                 ioc->enable_sdev_max_qd = 0;
3882                 shost_for_each_device(sdev, ioc->shost) {
3883                         sas_device_priv_data = sdev->hostdata;
3884                         if (!sas_device_priv_data)
3885                                 continue;
3886                         sas_target_priv_data = sas_device_priv_data->sas_target;
3887                         if (!sas_target_priv_data)
3888                                 continue;
3889
3890                         if (sas_target_priv_data->flags &
3891                             MPT_TARGET_FLAGS_VOLUME) {
3892                                 raid_device =
3893                                     mpt3sas_raid_device_find_by_handle(ioc,
3894                                     sas_target_priv_data->handle);
3895
3896                                 switch (raid_device->volume_type) {
3897                                 case MPI2_RAID_VOL_TYPE_RAID0:
3898                                         if (raid_device->device_info &
3899                                             MPI2_SAS_DEVICE_INFO_SSP_TARGET)
3900                                                 qdepth =
3901                                                     MPT3SAS_SAS_QUEUE_DEPTH;
3902                                         else
3903                                                 qdepth =
3904                                                     MPT3SAS_SATA_QUEUE_DEPTH;
3905                                         break;
3906                                 case MPI2_RAID_VOL_TYPE_RAID1E:
3907                                 case MPI2_RAID_VOL_TYPE_RAID1:
3908                                 case MPI2_RAID_VOL_TYPE_RAID10:
3909                                 case MPI2_RAID_VOL_TYPE_UNKNOWN:
3910                                 default:
3911                                         qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
3912                                 }
3913                         } else if (sas_target_priv_data->flags &
3914                             MPT_TARGET_FLAGS_PCIE_DEVICE)
3915                                 qdepth = ioc->max_nvme_qd;
3916                         else
3917                                 qdepth = (sas_target_priv_data->sas_dev->port_type > 1) ?
3918                                     ioc->max_wideport_qd : ioc->max_narrowport_qd;
3919
3920                         mpt3sas_scsih_change_queue_depth(sdev, qdepth);
3921                 }
3922                 break;
3923         case 1:
3924                 ioc->enable_sdev_max_qd = 1;
3925                 shost_for_each_device(sdev, ioc->shost)
3926                         mpt3sas_scsih_change_queue_depth(sdev,
3927                             shost->can_queue);
3928                 break;
3929         default:
3930                 return -EINVAL;
3931         }
3932
3933         return strlen(buf);
3934 }
3935 static DEVICE_ATTR_RW(enable_sdev_max_qd);
3936
3937 static struct attribute *mpt3sas_host_attrs[] = {
3938         &dev_attr_version_fw.attr,
3939         &dev_attr_version_bios.attr,
3940         &dev_attr_version_mpi.attr,
3941         &dev_attr_version_product.attr,
3942         &dev_attr_version_nvdata_persistent.attr,
3943         &dev_attr_version_nvdata_default.attr,
3944         &dev_attr_board_name.attr,
3945         &dev_attr_board_assembly.attr,
3946         &dev_attr_board_tracer.attr,
3947         &dev_attr_io_delay.attr,
3948         &dev_attr_device_delay.attr,
3949         &dev_attr_logging_level.attr,
3950         &dev_attr_fwfault_debug.attr,
3951         &dev_attr_fw_queue_depth.attr,
3952         &dev_attr_host_sas_address.attr,
3953         &dev_attr_ioc_reset_count.attr,
3954         &dev_attr_host_trace_buffer_size.attr,
3955         &dev_attr_host_trace_buffer.attr,
3956         &dev_attr_host_trace_buffer_enable.attr,
3957         &dev_attr_reply_queue_count.attr,
3958         &dev_attr_diag_trigger_master.attr,
3959         &dev_attr_diag_trigger_event.attr,
3960         &dev_attr_diag_trigger_scsi.attr,
3961         &dev_attr_diag_trigger_mpi.attr,
3962         &dev_attr_drv_support_bitmap.attr,
3963         &dev_attr_BRM_status.attr,
3964         &dev_attr_enable_sdev_max_qd.attr,
3965         NULL,
3966 };
3967
3968 static const struct attribute_group mpt3sas_host_attr_group = {
3969         .attrs = mpt3sas_host_attrs
3970 };
3971
3972 const struct attribute_group *mpt3sas_host_groups[] = {
3973         &mpt3sas_host_attr_group,
3974         NULL
3975 };
3976
3977 /* device attributes */
3978
3979 /**
3980  * sas_address_show - sas address
3981  * @dev: pointer to embedded class device
3982  * @attr: ?
3983  * @buf: the buffer returned
3984  *
3985  * This is the sas address for the target
3986  *
3987  * A sysfs 'read-only' shost attribute.
3988  */
3989 static ssize_t
3990 sas_address_show(struct device *dev, struct device_attribute *attr,
3991         char *buf)
3992 {
3993         struct scsi_device *sdev = to_scsi_device(dev);
3994         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3995
3996         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3997             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
3998 }
3999 static DEVICE_ATTR_RO(sas_address);
4000
4001 /**
4002  * sas_device_handle_show - device handle
4003  * @dev: pointer to embedded class device
4004  * @attr: ?
4005  * @buf: the buffer returned
4006  *
4007  * This is the firmware assigned device handle
4008  *
4009  * A sysfs 'read-only' shost attribute.
4010  */
4011 static ssize_t
4012 sas_device_handle_show(struct device *dev, struct device_attribute *attr,
4013         char *buf)
4014 {
4015         struct scsi_device *sdev = to_scsi_device(dev);
4016         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4017
4018         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
4019             sas_device_priv_data->sas_target->handle);
4020 }
4021 static DEVICE_ATTR_RO(sas_device_handle);
4022
4023 /**
4024  * sas_ncq_prio_supported_show - Indicate if device supports NCQ priority
4025  * @dev: pointer to embedded device
4026  * @attr: sas_ncq_prio_supported attribute descriptor
4027  * @buf: the buffer returned
4028  *
4029  * A sysfs 'read-only' sdev attribute, only works with SATA
4030  */
4031 static ssize_t
4032 sas_ncq_prio_supported_show(struct device *dev,
4033                             struct device_attribute *attr, char *buf)
4034 {
4035         struct scsi_device *sdev = to_scsi_device(dev);
4036
4037         return sysfs_emit(buf, "%d\n", scsih_ncq_prio_supp(sdev));
4038 }
4039 static DEVICE_ATTR_RO(sas_ncq_prio_supported);
4040
4041 /**
4042  * sas_ncq_prio_enable_show - send prioritized io commands to device
4043  * @dev: pointer to embedded device
4044  * @attr: ?
4045  * @buf: the buffer returned
4046  *
4047  * A sysfs 'read/write' sdev attribute, only works with SATA
4048  */
4049 static ssize_t
4050 sas_ncq_prio_enable_show(struct device *dev,
4051                                  struct device_attribute *attr, char *buf)
4052 {
4053         struct scsi_device *sdev = to_scsi_device(dev);
4054         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4055
4056         return snprintf(buf, PAGE_SIZE, "%d\n",
4057                         sas_device_priv_data->ncq_prio_enable);
4058 }
4059
4060 static ssize_t
4061 sas_ncq_prio_enable_store(struct device *dev,
4062                                   struct device_attribute *attr,
4063                                   const char *buf, size_t count)
4064 {
4065         struct scsi_device *sdev = to_scsi_device(dev);
4066         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
4067         bool ncq_prio_enable = 0;
4068
4069         if (kstrtobool(buf, &ncq_prio_enable))
4070                 return -EINVAL;
4071
4072         if (!scsih_ncq_prio_supp(sdev))
4073                 return -EINVAL;
4074
4075         sas_device_priv_data->ncq_prio_enable = ncq_prio_enable;
4076         return strlen(buf);
4077 }
4078 static DEVICE_ATTR_RW(sas_ncq_prio_enable);
4079
4080 static struct attribute *mpt3sas_dev_attrs[] = {
4081         &dev_attr_sas_address.attr,
4082         &dev_attr_sas_device_handle.attr,
4083         &dev_attr_sas_ncq_prio_supported.attr,
4084         &dev_attr_sas_ncq_prio_enable.attr,
4085         NULL,
4086 };
4087
4088 static const struct attribute_group mpt3sas_dev_attr_group = {
4089         .attrs = mpt3sas_dev_attrs
4090 };
4091
4092 const struct attribute_group *mpt3sas_dev_groups[] = {
4093         &mpt3sas_dev_attr_group,
4094         NULL
4095 };
4096
4097 /* file operations table for mpt3ctl device */
4098 static const struct file_operations ctl_fops = {
4099         .owner = THIS_MODULE,
4100         .unlocked_ioctl = _ctl_ioctl,
4101         .poll = _ctl_poll,
4102         .fasync = _ctl_fasync,
4103 #ifdef CONFIG_COMPAT
4104         .compat_ioctl = _ctl_ioctl_compat,
4105 #endif
4106 };
4107
4108 /* file operations table for mpt2ctl device */
4109 static const struct file_operations ctl_gen2_fops = {
4110         .owner = THIS_MODULE,
4111         .unlocked_ioctl = _ctl_mpt2_ioctl,
4112         .poll = _ctl_poll,
4113         .fasync = _ctl_fasync,
4114 #ifdef CONFIG_COMPAT
4115         .compat_ioctl = _ctl_mpt2_ioctl_compat,
4116 #endif
4117 };
4118
4119 static struct miscdevice ctl_dev = {
4120         .minor  = MPT3SAS_MINOR,
4121         .name   = MPT3SAS_DEV_NAME,
4122         .fops   = &ctl_fops,
4123 };
4124
4125 static struct miscdevice gen2_ctl_dev = {
4126         .minor  = MPT2SAS_MINOR,
4127         .name   = MPT2SAS_DEV_NAME,
4128         .fops   = &ctl_gen2_fops,
4129 };
4130
4131 /**
4132  * mpt3sas_ctl_init - main entry point for ctl.
4133  * @hbas_to_enumerate: ?
4134  */
4135 void
4136 mpt3sas_ctl_init(ushort hbas_to_enumerate)
4137 {
4138         async_queue = NULL;
4139
4140         /* Don't register mpt3ctl ioctl device if
4141          * hbas_to_enumarate is one.
4142          */
4143         if (hbas_to_enumerate != 1)
4144                 if (misc_register(&ctl_dev) < 0)
4145                         pr_err("%s can't register misc device [minor=%d]\n",
4146                             MPT3SAS_DRIVER_NAME, MPT3SAS_MINOR);
4147
4148         /* Don't register mpt3ctl ioctl device if
4149          * hbas_to_enumarate is two.
4150          */
4151         if (hbas_to_enumerate != 2)
4152                 if (misc_register(&gen2_ctl_dev) < 0)
4153                         pr_err("%s can't register misc device [minor=%d]\n",
4154                             MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
4155
4156         init_waitqueue_head(&ctl_poll_wait);
4157 }
4158
4159 /**
4160  * mpt3sas_ctl_exit - exit point for ctl
4161  * @hbas_to_enumerate: ?
4162  */
4163 void
4164 mpt3sas_ctl_exit(ushort hbas_to_enumerate)
4165 {
4166         struct MPT3SAS_ADAPTER *ioc;
4167         int i;
4168
4169         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
4170
4171                 /* free memory associated to diag buffers */
4172                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
4173                         if (!ioc->diag_buffer[i])
4174                                 continue;
4175                         dma_free_coherent(&ioc->pdev->dev,
4176                                           ioc->diag_buffer_sz[i],
4177                                           ioc->diag_buffer[i],
4178                                           ioc->diag_buffer_dma[i]);
4179                         ioc->diag_buffer[i] = NULL;
4180                         ioc->diag_buffer_status[i] = 0;
4181                 }
4182
4183                 kfree(ioc->event_log);
4184         }
4185         if (hbas_to_enumerate != 1)
4186                 misc_deregister(&ctl_dev);
4187         if (hbas_to_enumerate != 2)
4188                 misc_deregister(&gen2_ctl_dev);
4189 }