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_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                 mpt3sas_send_diag_release(ioc, i, &issue_reset);
 483         }
 484 }
 485
 486 /**
 487  * mpt3sas_ctl_reset_handler - clears outstanding ioctl cmd.
 488  * @ioc: per adapter object
 489  *
 490  * The handler for doing any required cleanup or initialization.
 491  */
 492 void mpt3sas_ctl_clear_outstanding_ioctls(struct MPT3SAS_ADAPTER *ioc)
 493 {
 494         dtmprintk(ioc,
 495             ioc_info(ioc, "%s: clear outstanding ioctl cmd\n", __func__));
 496         if (ioc->ctl_cmds.status & MPT3_CMD_PENDING) {
 497                 ioc->ctl_cmds.status |= MPT3_CMD_RESET;
 498                 mpt3sas_base_free_smid(ioc, ioc->ctl_cmds.smid);
 499                 complete(&ioc->ctl_cmds.done);
 500         }
 501 }
 502
 503 /**
 504  * mpt3sas_ctl_reset_handler - reset callback handler (for ctl)
 505  * @ioc: per adapter object
 506  *
 507  * The handler for doing any required cleanup or initialization.
 508  */
 509 void mpt3sas_ctl_reset_done_handler(struct MPT3SAS_ADAPTER *ioc)
 510 {
 511         int i;
 512
 513         dtmprintk(ioc, ioc_info(ioc, "%s: MPT3_IOC_DONE_RESET\n", __func__));
 514
 515         for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
 516                 if (!(ioc->diag_buffer_status[i] &
 517                       MPT3_DIAG_BUFFER_IS_REGISTERED))
 518                         continue;
 519                 if ((ioc->diag_buffer_status[i] &
 520                      MPT3_DIAG_BUFFER_IS_RELEASED))
 521                         continue;
 522                 ioc->diag_buffer_status[i] |=
 523                         MPT3_DIAG_BUFFER_IS_DIAG_RESET;
 524         }
 525 }
 526
 527 /**
 528  * _ctl_fasync -
 529  * @fd: ?
 530  * @filep: ?
 531  * @mode: ?
 532  *
 533  * Called when application request fasyn callback handler.
 534  */
 535 static int
 536 _ctl_fasync(int fd, struct file *filep, int mode)
 537 {
 538         return fasync_helper(fd, filep, mode, &async_queue);
 539 }
 540
 541 /**
 542  * _ctl_poll -
 543  * @filep: ?
 544  * @wait: ?
 545  *
 546  */
 547 static __poll_t
 548 _ctl_poll(struct file *filep, poll_table *wait)
 549 {
 550         struct MPT3SAS_ADAPTER *ioc;
 551
 552         poll_wait(filep, &ctl_poll_wait, wait);
 553
 554         /* global ioc lock to protect controller on list operations */
 555         spin_lock(&gioc_lock);
 556         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
 557                 if (ioc->aen_event_read_flag) {
 558                         spin_unlock(&gioc_lock);
 559                         return EPOLLIN | EPOLLRDNORM;
 560                 }
 561         }
 562         spin_unlock(&gioc_lock);
 563         return 0;
 564 }
 565
 566 /**
 567  * _ctl_set_task_mid - assign an active smid to tm request
 568  * @ioc: per adapter object
 569  * @karg: (struct mpt3_ioctl_command)
 570  * @tm_request: pointer to mf from user space
 571  *
 572  * Return: 0 when an smid if found, else fail.
 573  * during failure, the reply frame is filled.
 574  */
 575 static int
 576 _ctl_set_task_mid(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command *karg,
 577         Mpi2SCSITaskManagementRequest_t *tm_request)
 578 {
 579         u8 found = 0;
 580         u16 smid;
 581         u16 handle;
 582         struct scsi_cmnd *scmd;
 583         struct MPT3SAS_DEVICE *priv_data;
 584         Mpi2SCSITaskManagementReply_t *tm_reply;
 585         u32 sz;
 586         u32 lun;
 587         char *desc = NULL;
 588
 589         if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK)
 590                 desc = "abort_task";
 591         else if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK)
 592                 desc = "query_task";
 593         else
 594                 return 0;
 595
 596         lun = scsilun_to_int((struct scsi_lun *)tm_request->LUN);
 597
 598         handle = le16_to_cpu(tm_request->DevHandle);
 599         for (smid = ioc->scsiio_depth; smid && !found; smid--) {
 600                 struct scsiio_tracker *st;
 601
 602                 scmd = mpt3sas_scsih_scsi_lookup_get(ioc, smid);
 603                 if (!scmd)
 604                         continue;
 605                 if (lun != scmd->device->lun)
 606                         continue;
 607                 priv_data = scmd->device->hostdata;
 608                 if (priv_data->sas_target == NULL)
 609                         continue;
 610                 if (priv_data->sas_target->handle != handle)
 611                         continue;
 612                 st = scsi_cmd_priv(scmd);
 613
 614                 /*
 615                  * If the given TaskMID from the user space is zero, then the
 616                  * first outstanding smid will be picked up.  Otherwise,
 617                  * targeted smid will be the one.
 618                  */
 619                 if (!tm_request->TaskMID || tm_request->TaskMID == st->smid) {
 620                         tm_request->TaskMID = cpu_to_le16(st->smid);
 621                         found = 1;
 622                 }
 623         }
 624
 625         if (!found) {
 626                 dctlprintk(ioc,
 627                            ioc_info(ioc, "%s: handle(0x%04x), lun(%d), no active mid!!\n",
 628                                     desc, le16_to_cpu(tm_request->DevHandle),
 629                                     lun));
 630                 tm_reply = ioc->ctl_cmds.reply;
 631                 tm_reply->DevHandle = tm_request->DevHandle;
 632                 tm_reply->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
 633                 tm_reply->TaskType = tm_request->TaskType;
 634                 tm_reply->MsgLength = sizeof(Mpi2SCSITaskManagementReply_t)/4;
 635                 tm_reply->VP_ID = tm_request->VP_ID;
 636                 tm_reply->VF_ID = tm_request->VF_ID;
 637                 sz = min_t(u32, karg->max_reply_bytes, ioc->reply_sz);
 638                 if (copy_to_user(karg->reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 639                     sz))
 640                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 641                             __LINE__, __func__);
 642                 return 1;
 643         }
 644
 645         dctlprintk(ioc,
 646                    ioc_info(ioc, "%s: handle(0x%04x), lun(%d), task_mid(%d)\n",
 647                             desc, le16_to_cpu(tm_request->DevHandle), lun,
 648                             le16_to_cpu(tm_request->TaskMID)));
 649         return 0;
 650 }
 651
 652 /**
 653  * _ctl_do_mpt_command - main handler for MPT3COMMAND opcode
 654  * @ioc: per adapter object
 655  * @karg: (struct mpt3_ioctl_command)
 656  * @mf: pointer to mf in user space
 657  */
 658 static long
 659 _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
 660         void __user *mf)
 661 {
 662         MPI2RequestHeader_t *mpi_request = NULL, *request;
 663         MPI2DefaultReply_t *mpi_reply;
 664         Mpi26NVMeEncapsulatedRequest_t *nvme_encap_request = NULL;
 665         struct _pcie_device *pcie_device = NULL;
 666         u16 smid;
 667         unsigned long timeout;
 668         u8 issue_reset;
 669         u32 sz, sz_arg;
 670         void *psge;
 671         void *data_out = NULL;
 672         dma_addr_t data_out_dma = 0;
 673         size_t data_out_sz = 0;
 674         void *data_in = NULL;
 675         dma_addr_t data_in_dma = 0;
 676         size_t data_in_sz = 0;
 677         long ret;
 678         u16 device_handle = MPT3SAS_INVALID_DEVICE_HANDLE;
 679
 680         issue_reset = 0;
 681
 682         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
 683                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
 684                 ret = -EAGAIN;
 685                 goto out;
 686         }
 687
 688         ret = mpt3sas_wait_for_ioc(ioc, IOC_OPERATIONAL_WAIT_COUNT);
 689         if (ret)
 690                 goto out;
 691
 692         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 693         if (!mpi_request) {
 694                 ioc_err(ioc, "%s: failed obtaining a memory for mpi_request\n",
 695                         __func__);
 696                 ret = -ENOMEM;
 697                 goto out;
 698         }
 699
 700         /* Check for overflow and wraparound */
 701         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 702             karg.data_sge_offset > (UINT_MAX / 4)) {
 703                 ret = -EINVAL;
 704                 goto out;
 705         }
 706
 707         /* copy in request message frame from user */
 708         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 709                 pr_err("failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 710                     __func__);
 711                 ret = -EFAULT;
 712                 goto out;
 713         }
 714
 715         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 716                 smid = mpt3sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 717                 if (!smid) {
 718                         ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
 719                         ret = -EAGAIN;
 720                         goto out;
 721                 }
 722         } else {
 723                 /* Use first reserved smid for passthrough ioctls */
 724                 smid = ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT + 1;
 725         }
 726
 727         ret = 0;
 728         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
 729         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 730         request = mpt3sas_base_get_msg_frame(ioc, smid);
 731         memset(request, 0, ioc->request_sz);
 732         memcpy(request, mpi_request, karg.data_sge_offset*4);
 733         ioc->ctl_cmds.smid = smid;
 734         data_out_sz = karg.data_out_size;
 735         data_in_sz = karg.data_in_size;
 736
 737         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 738             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 739             mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT ||
 740             mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH ||
 741             mpi_request->Function == MPI2_FUNCTION_NVME_ENCAPSULATED) {
 742
 743                 device_handle = le16_to_cpu(mpi_request->FunctionDependent1);
 744                 if (!device_handle || (device_handle >
 745                     ioc->facts.MaxDevHandle)) {
 746                         ret = -EINVAL;
 747                         mpt3sas_base_free_smid(ioc, smid);
 748                         goto out;
 749                 }
 750         }
 751
 752         /* obtain dma-able memory for data transfer */
 753         if (data_out_sz) /* WRITE */ {
 754                 data_out = dma_alloc_coherent(&ioc->pdev->dev, data_out_sz,
 755                                 &data_out_dma, GFP_KERNEL);
 756                 if (!data_out) {
 757                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 758                             __LINE__, __func__);
 759                         ret = -ENOMEM;
 760                         mpt3sas_base_free_smid(ioc, smid);
 761                         goto out;
 762                 }
 763                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 764                         data_out_sz)) {
 765                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 766                             __LINE__, __func__);
 767                         ret =  -EFAULT;
 768                         mpt3sas_base_free_smid(ioc, smid);
 769                         goto out;
 770                 }
 771         }
 772
 773         if (data_in_sz) /* READ */ {
 774                 data_in = dma_alloc_coherent(&ioc->pdev->dev, data_in_sz,
 775                                 &data_in_dma, GFP_KERNEL);
 776                 if (!data_in) {
 777                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
 778                             __LINE__, __func__);
 779                         ret = -ENOMEM;
 780                         mpt3sas_base_free_smid(ioc, smid);
 781                         goto out;
 782                 }
 783         }
 784
 785         psge = (void *)request + (karg.data_sge_offset*4);
 786
 787         /* send command to firmware */
 788         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 789
 790         init_completion(&ioc->ctl_cmds.done);
 791         switch (mpi_request->Function) {
 792         case MPI2_FUNCTION_NVME_ENCAPSULATED:
 793         {
 794                 nvme_encap_request = (Mpi26NVMeEncapsulatedRequest_t *)request;
 795                 if (!ioc->pcie_sg_lookup) {
 796                         dtmprintk(ioc, ioc_info(ioc,
 797                             "HBA doesn't support NVMe. Rejecting NVMe Encapsulated request.\n"
 798                             ));
 799
 800                         if (ioc->logging_level & MPT_DEBUG_TM)
 801                                 _debug_dump_mf(nvme_encap_request,
 802                                     ioc->request_sz/4);
 803                         mpt3sas_base_free_smid(ioc, smid);
 804                         ret = -EINVAL;
 805                         goto out;
 806                 }
 807                 /*
 808                  * Get the Physical Address of the sense buffer.
 809                  * Use Error Response buffer address field to hold the sense
 810                  * buffer address.
 811                  * Clear the internal sense buffer, which will potentially hold
 812                  * the Completion Queue Entry on return, or 0 if no Entry.
 813                  * Build the PRPs and set direction bits.
 814                  * Send the request.
 815                  */
 816                 nvme_encap_request->ErrorResponseBaseAddress =
 817                     cpu_to_le64(ioc->sense_dma & 0xFFFFFFFF00000000UL);
 818                 nvme_encap_request->ErrorResponseBaseAddress |=
 819                    cpu_to_le64(le32_to_cpu(
 820                    mpt3sas_base_get_sense_buffer_dma(ioc, smid)));
 821                 nvme_encap_request->ErrorResponseAllocationLength =
 822                                         cpu_to_le16(NVME_ERROR_RESPONSE_SIZE);
 823                 memset(ioc->ctl_cmds.sense, 0, NVME_ERROR_RESPONSE_SIZE);
 824                 ioc->build_nvme_prp(ioc, smid, nvme_encap_request,
 825                     data_out_dma, data_out_sz, data_in_dma, data_in_sz);
 826                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 827                         dtmprintk(ioc,
 828                                   ioc_info(ioc, "handle(0x%04x): ioctl failed due to device removal in progress\n",
 829                                            device_handle));
 830                         mpt3sas_base_free_smid(ioc, smid);
 831                         ret = -EINVAL;
 832                         goto out;
 833                 }
 834                 mpt3sas_base_put_smid_nvme_encap(ioc, smid);
 835                 break;
 836         }
 837         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 838         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 839         {
 840                 Mpi2SCSIIORequest_t *scsiio_request =
 841                     (Mpi2SCSIIORequest_t *)request;
 842                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 843                 scsiio_request->SenseBufferLowAddress =
 844                     mpt3sas_base_get_sense_buffer_dma(ioc, smid);
 845                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 846                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 847                         dtmprintk(ioc,
 848                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 849                                            device_handle));
 850                         mpt3sas_base_free_smid(ioc, smid);
 851                         ret = -EINVAL;
 852                         goto out;
 853                 }
 854                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 855                     data_in_dma, data_in_sz);
 856                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 857                         ioc->put_smid_scsi_io(ioc, smid, device_handle);
 858                 else
 859                         ioc->put_smid_default(ioc, smid);
 860                 break;
 861         }
 862         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 863         {
 864                 Mpi2SCSITaskManagementRequest_t *tm_request =
 865                     (Mpi2SCSITaskManagementRequest_t *)request;
 866
 867                 dtmprintk(ioc,
 868                           ioc_info(ioc, "TASK_MGMT: handle(0x%04x), task_type(0x%02x)\n",
 869                                    le16_to_cpu(tm_request->DevHandle),
 870                                    tm_request->TaskType));
 871                 ioc->got_task_abort_from_ioctl = 1;
 872                 if (tm_request->TaskType ==
 873                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 874                     tm_request->TaskType ==
 875                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 876                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 877                                 mpt3sas_base_free_smid(ioc, smid);
 878                                 ioc->got_task_abort_from_ioctl = 0;
 879                                 goto out;
 880                         }
 881                 }
 882                 ioc->got_task_abort_from_ioctl = 0;
 883
 884                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 885                         dtmprintk(ioc,
 886                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 887                                            device_handle));
 888                         mpt3sas_base_free_smid(ioc, smid);
 889                         ret = -EINVAL;
 890                         goto out;
 891                 }
 892                 mpt3sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 893                     tm_request->DevHandle));
 894                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 895                     data_in_dma, data_in_sz);
 896                 ioc->put_smid_hi_priority(ioc, smid, 0);
 897                 break;
 898         }
 899         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 900         {
 901                 Mpi2SmpPassthroughRequest_t *smp_request =
 902                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 903                 u8 *data;
 904
 905                 /* ioc determines which port to use */
 906                 smp_request->PhysicalPort = 0xFF;
 907                 if (smp_request->PassthroughFlags &
 908                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 909                         data = (u8 *)&smp_request->SGL;
 910                 else {
 911                         if (unlikely(data_out == NULL)) {
 912                                 pr_err("failure at %s:%d/%s()!\n",
 913                                     __FILE__, __LINE__, __func__);
 914                                 mpt3sas_base_free_smid(ioc, smid);
 915                                 ret = -EINVAL;
 916                                 goto out;
 917                         }
 918                         data = data_out;
 919                 }
 920
 921                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 922                         ioc->ioc_link_reset_in_progress = 1;
 923                         ioc->ignore_loginfos = 1;
 924                 }
 925                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 926                     data_in_sz);
 927                 ioc->put_smid_default(ioc, smid);
 928                 break;
 929         }
 930         case MPI2_FUNCTION_SATA_PASSTHROUGH:
 931         {
 932                 if (test_bit(device_handle, ioc->device_remove_in_progress)) {
 933                         dtmprintk(ioc,
 934                                   ioc_info(ioc, "handle(0x%04x) :ioctl failed due to device removal in progress\n",
 935                                            device_handle));
 936                         mpt3sas_base_free_smid(ioc, smid);
 937                         ret = -EINVAL;
 938                         goto out;
 939                 }
 940                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 941                     data_in_sz);
 942                 ioc->put_smid_default(ioc, smid);
 943                 break;
 944         }
 945         case MPI2_FUNCTION_FW_DOWNLOAD:
 946         case MPI2_FUNCTION_FW_UPLOAD:
 947         {
 948                 ioc->build_sg(ioc, psge, data_out_dma, data_out_sz, data_in_dma,
 949                     data_in_sz);
 950                 ioc->put_smid_default(ioc, smid);
 951                 break;
 952         }
 953         case MPI2_FUNCTION_TOOLBOX:
 954         {
 955                 Mpi2ToolboxCleanRequest_t *toolbox_request =
 956                         (Mpi2ToolboxCleanRequest_t *)mpi_request;
 957
 958                 if ((toolbox_request->Tool == MPI2_TOOLBOX_DIAGNOSTIC_CLI_TOOL)
 959                     || (toolbox_request->Tool ==
 960                     MPI26_TOOLBOX_BACKEND_PCIE_LANE_MARGIN))
 961                         ioc->build_sg(ioc, psge, data_out_dma, data_out_sz,
 962                                 data_in_dma, data_in_sz);
 963                 else if (toolbox_request->Tool ==
 964                                 MPI2_TOOLBOX_MEMORY_MOVE_TOOL) {
 965                         Mpi2ToolboxMemMoveRequest_t *mem_move_request =
 966                                         (Mpi2ToolboxMemMoveRequest_t *)request;
 967                         Mpi2SGESimple64_t tmp, *src = NULL, *dst = NULL;
 968
 969                         ioc->build_sg_mpi(ioc, psge, data_out_dma,
 970                                         data_out_sz, data_in_dma, data_in_sz);
 971                         if (data_out_sz && !data_in_sz) {
 972                                 dst =
 973                                     (Mpi2SGESimple64_t *)&mem_move_request->SGL;
 974                                 src = (void *)dst + ioc->sge_size;
 975
 976                                 memcpy(&tmp, src, ioc->sge_size);
 977                                 memcpy(src, dst, ioc->sge_size);
 978                                 memcpy(dst, &tmp, ioc->sge_size);
 979                         }
 980                         if (ioc->logging_level & MPT_DEBUG_TM) {
 981                                 ioc_info(ioc,
 982                                   "Mpi2ToolboxMemMoveRequest_t request msg\n");
 983                                 _debug_dump_mf(mem_move_request,
 984                                                         ioc->request_sz/4);
 985                         }
 986                 } else
 987                         ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 988                             data_in_dma, data_in_sz);
 989                 ioc->put_smid_default(ioc, smid);
 990                 break;
 991         }
 992         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 993         {
 994                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
 995                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
 996
 997                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
 998                     || sasiounit_request->Operation ==
 999                     MPI2_SAS_OP_PHY_LINK_RESET) {
1000                         ioc->ioc_link_reset_in_progress = 1;
1001                         ioc->ignore_loginfos = 1;
1002                 }
1003                 /* drop to default case for posting the request */
1004         }
1005                 fallthrough;
1006         default:
1007                 ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
1008                     data_in_dma, data_in_sz);
1009                 ioc->put_smid_default(ioc, smid);
1010                 break;
1011         }
1012
1013         if (karg.timeout < MPT3_IOCTL_DEFAULT_TIMEOUT)
1014                 timeout = MPT3_IOCTL_DEFAULT_TIMEOUT;
1015         else
1016                 timeout = karg.timeout;
1017         wait_for_completion_timeout(&ioc->ctl_cmds.done, timeout*HZ);
1018         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
1019                 Mpi2SCSITaskManagementRequest_t *tm_request =
1020                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
1021                 mpt3sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
1022                     tm_request->DevHandle));
1023                 mpt3sas_trigger_master(ioc, MASTER_TRIGGER_TASK_MANAGMENT);
1024         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
1025             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
1026                 ioc->ioc_link_reset_in_progress) {
1027                 ioc->ioc_link_reset_in_progress = 0;
1028                 ioc->ignore_loginfos = 0;
1029         }
1030         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1031                 mpt3sas_check_cmd_timeout(ioc,
1032                     ioc->ctl_cmds.status, mpi_request,
1033                     karg.data_sge_offset, issue_reset);
1034                 goto issue_host_reset;
1035         }
1036
1037         mpi_reply = ioc->ctl_cmds.reply;
1038
1039         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
1040             (ioc->logging_level & MPT_DEBUG_TM)) {
1041                 Mpi2SCSITaskManagementReply_t *tm_reply =
1042                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
1043
1044                 ioc_info(ioc, "TASK_MGMT: IOCStatus(0x%04x), IOCLogInfo(0x%08x), TerminationCount(0x%08x)\n",
1045                          le16_to_cpu(tm_reply->IOCStatus),
1046                          le32_to_cpu(tm_reply->IOCLogInfo),
1047                          le32_to_cpu(tm_reply->TerminationCount));
1048         }
1049
1050         /* copy out xdata to user */
1051         if (data_in_sz) {
1052                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
1053                     data_in_sz)) {
1054                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1055                             __LINE__, __func__);
1056                         ret = -ENODATA;
1057                         goto out;
1058                 }
1059         }
1060
1061         /* copy out reply message frame to user */
1062         if (karg.max_reply_bytes) {
1063                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
1064                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
1065                     sz)) {
1066                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1067                             __LINE__, __func__);
1068                         ret = -ENODATA;
1069                         goto out;
1070                 }
1071         }
1072
1073         /* copy out sense/NVMe Error Response to user */
1074         if (karg.max_sense_bytes && (mpi_request->Function ==
1075             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
1076             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH || mpi_request->Function ==
1077             MPI2_FUNCTION_NVME_ENCAPSULATED)) {
1078                 if (karg.sense_data_ptr == NULL) {
1079                         ioc_info(ioc, "Response buffer provided by application is NULL; Response data will not be returned\n");
1080                         goto out;
1081                 }
1082                 sz_arg = (mpi_request->Function ==
1083                 MPI2_FUNCTION_NVME_ENCAPSULATED) ? NVME_ERROR_RESPONSE_SIZE :
1084                                                         SCSI_SENSE_BUFFERSIZE;
1085                 sz = min_t(u32, karg.max_sense_bytes, sz_arg);
1086                 if (copy_to_user(karg.sense_data_ptr, ioc->ctl_cmds.sense,
1087                     sz)) {
1088                         pr_err("failure at %s:%d/%s()!\n", __FILE__,
1089                                 __LINE__, __func__);
1090                         ret = -ENODATA;
1091                         goto out;
1092                 }
1093         }
1094
1095  issue_host_reset:
1096         if (issue_reset) {
1097                 ret = -ENODATA;
1098                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
1099                     mpi_request->Function ==
1100                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
1101                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
1102                         ioc_info(ioc, "issue target reset: handle = (0x%04x)\n",
1103                                  le16_to_cpu(mpi_request->FunctionDependent1));
1104                         mpt3sas_halt_firmware(ioc);
1105                         pcie_device = mpt3sas_get_pdev_by_handle(ioc,
1106                                 le16_to_cpu(mpi_request->FunctionDependent1));
1107                         if (pcie_device && (!ioc->tm_custom_handling) &&
1108                             (!(mpt3sas_scsih_is_pcie_scsi_device(
1109                             pcie_device->device_info))))
1110                                 mpt3sas_scsih_issue_locked_tm(ioc,
1111                                   le16_to_cpu(mpi_request->FunctionDependent1),
1112                                   0, 0, 0,
1113                                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1114                                   0, pcie_device->reset_timeout,
1115                         MPI26_SCSITASKMGMT_MSGFLAGS_PROTOCOL_LVL_RST_PCIE);
1116                         else
1117                                 mpt3sas_scsih_issue_locked_tm(ioc,
1118                                   le16_to_cpu(mpi_request->FunctionDependent1),
1119                                   0, 0, 0,
1120                                   MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0,
1121                                   0, 30, MPI2_SCSITASKMGMT_MSGFLAGS_LINK_RESET);
1122                 } else
1123                         mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1124         }
1125
1126  out:
1127         if (pcie_device)
1128                 pcie_device_put(pcie_device);
1129
1130         /* free memory associated with sg buffers */
1131         if (data_in)
1132                 dma_free_coherent(&ioc->pdev->dev, data_in_sz, data_in,
1133                     data_in_dma);
1134
1135         if (data_out)
1136                 dma_free_coherent(&ioc->pdev->dev, data_out_sz, data_out,
1137                     data_out_dma);
1138
1139         kfree(mpi_request);
1140         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1141         return ret;
1142 }
1143
1144 /**
1145  * _ctl_getiocinfo - main handler for MPT3IOCINFO opcode
1146  * @ioc: per adapter object
1147  * @arg: user space buffer containing ioctl content
1148  */
1149 static long
1150 _ctl_getiocinfo(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1151 {
1152         struct mpt3_ioctl_iocinfo karg;
1153
1154         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1155                                  __func__));
1156
1157         memset(&karg, 0 , sizeof(karg));
1158         if (ioc->pfacts)
1159                 karg.port_number = ioc->pfacts[0].PortNumber;
1160         karg.hw_rev = ioc->pdev->revision;
1161         karg.pci_id = ioc->pdev->device;
1162         karg.subsystem_device = ioc->pdev->subsystem_device;
1163         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1164         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1165         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1166         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1167         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1168         karg.firmware_version = ioc->facts.FWVersion.Word;
1169         strcpy(karg.driver_version, ioc->driver_name);
1170         strcat(karg.driver_version, "-");
1171         switch  (ioc->hba_mpi_version_belonged) {
1172         case MPI2_VERSION:
1173                 if (ioc->is_warpdrive)
1174                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1175                 else
1176                         karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1177                 strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1178                 break;
1179         case MPI25_VERSION:
1180         case MPI26_VERSION:
1181                 if (ioc->is_gen35_ioc)
1182                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS35;
1183                 else
1184                         karg.adapter_type = MPT3_IOCTL_INTERFACE_SAS3;
1185                 strcat(karg.driver_version, MPT3SAS_DRIVER_VERSION);
1186                 break;
1187         }
1188         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1189
1190         if (copy_to_user(arg, &karg, sizeof(karg))) {
1191                 pr_err("failure at %s:%d/%s()!\n",
1192                     __FILE__, __LINE__, __func__);
1193                 return -EFAULT;
1194         }
1195         return 0;
1196 }
1197
1198 /**
1199  * _ctl_eventquery - main handler for MPT3EVENTQUERY opcode
1200  * @ioc: per adapter object
1201  * @arg: user space buffer containing ioctl content
1202  */
1203 static long
1204 _ctl_eventquery(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1205 {
1206         struct mpt3_ioctl_eventquery karg;
1207
1208         if (copy_from_user(&karg, arg, sizeof(karg))) {
1209                 pr_err("failure at %s:%d/%s()!\n",
1210                     __FILE__, __LINE__, __func__);
1211                 return -EFAULT;
1212         }
1213
1214         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1215                                  __func__));
1216
1217         karg.event_entries = MPT3SAS_CTL_EVENT_LOG_SIZE;
1218         memcpy(karg.event_types, ioc->event_type,
1219             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1220
1221         if (copy_to_user(arg, &karg, sizeof(karg))) {
1222                 pr_err("failure at %s:%d/%s()!\n",
1223                     __FILE__, __LINE__, __func__);
1224                 return -EFAULT;
1225         }
1226         return 0;
1227 }
1228
1229 /**
1230  * _ctl_eventenable - main handler for MPT3EVENTENABLE opcode
1231  * @ioc: per adapter object
1232  * @arg: user space buffer containing ioctl content
1233  */
1234 static long
1235 _ctl_eventenable(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1236 {
1237         struct mpt3_ioctl_eventenable karg;
1238
1239         if (copy_from_user(&karg, arg, sizeof(karg))) {
1240                 pr_err("failure at %s:%d/%s()!\n",
1241                     __FILE__, __LINE__, __func__);
1242                 return -EFAULT;
1243         }
1244
1245         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1246                                  __func__));
1247
1248         memcpy(ioc->event_type, karg.event_types,
1249             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1250         mpt3sas_base_validate_event_type(ioc, ioc->event_type);
1251
1252         if (ioc->event_log)
1253                 return 0;
1254         /* initialize event_log */
1255         ioc->event_context = 0;
1256         ioc->aen_event_read_flag = 0;
1257         ioc->event_log = kcalloc(MPT3SAS_CTL_EVENT_LOG_SIZE,
1258             sizeof(struct MPT3_IOCTL_EVENTS), GFP_KERNEL);
1259         if (!ioc->event_log) {
1260                 pr_err("failure at %s:%d/%s()!\n",
1261                     __FILE__, __LINE__, __func__);
1262                 return -ENOMEM;
1263         }
1264         return 0;
1265 }
1266
1267 /**
1268  * _ctl_eventreport - main handler for MPT3EVENTREPORT opcode
1269  * @ioc: per adapter object
1270  * @arg: user space buffer containing ioctl content
1271  */
1272 static long
1273 _ctl_eventreport(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1274 {
1275         struct mpt3_ioctl_eventreport karg;
1276         u32 number_bytes, max_events, max;
1277         struct mpt3_ioctl_eventreport __user *uarg = arg;
1278
1279         if (copy_from_user(&karg, arg, sizeof(karg))) {
1280                 pr_err("failure at %s:%d/%s()!\n",
1281                     __FILE__, __LINE__, __func__);
1282                 return -EFAULT;
1283         }
1284
1285         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1286                                  __func__));
1287
1288         number_bytes = karg.hdr.max_data_size -
1289             sizeof(struct mpt3_ioctl_header);
1290         max_events = number_bytes/sizeof(struct MPT3_IOCTL_EVENTS);
1291         max = min_t(u32, MPT3SAS_CTL_EVENT_LOG_SIZE, max_events);
1292
1293         /* If fewer than 1 event is requested, there must have
1294          * been some type of error.
1295          */
1296         if (!max || !ioc->event_log)
1297                 return -ENODATA;
1298
1299         number_bytes = max * sizeof(struct MPT3_IOCTL_EVENTS);
1300         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1301                 pr_err("failure at %s:%d/%s()!\n",
1302                     __FILE__, __LINE__, __func__);
1303                 return -EFAULT;
1304         }
1305
1306         /* reset flag so SIGIO can restart */
1307         ioc->aen_event_read_flag = 0;
1308         return 0;
1309 }
1310
1311 /**
1312  * _ctl_do_reset - main handler for MPT3HARDRESET opcode
1313  * @ioc: per adapter object
1314  * @arg: user space buffer containing ioctl content
1315  */
1316 static long
1317 _ctl_do_reset(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1318 {
1319         struct mpt3_ioctl_diag_reset karg;
1320         int retval;
1321
1322         if (copy_from_user(&karg, arg, sizeof(karg))) {
1323                 pr_err("failure at %s:%d/%s()!\n",
1324                     __FILE__, __LINE__, __func__);
1325                 return -EFAULT;
1326         }
1327
1328         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1329             ioc->is_driver_loading)
1330                 return -EAGAIN;
1331
1332         dctlprintk(ioc, ioc_info(ioc, "%s: enter\n",
1333                                  __func__));
1334
1335         retval = mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1336         ioc_info(ioc,
1337             "Ioctl: host reset: %s\n", ((!retval) ? "SUCCESS" : "FAILED"));
1338         return 0;
1339 }
1340
1341 /**
1342  * _ctl_btdh_search_sas_device - searching for sas device
1343  * @ioc: per adapter object
1344  * @btdh: btdh ioctl payload
1345  */
1346 static int
1347 _ctl_btdh_search_sas_device(struct MPT3SAS_ADAPTER *ioc,
1348         struct mpt3_ioctl_btdh_mapping *btdh)
1349 {
1350         struct _sas_device *sas_device;
1351         unsigned long flags;
1352         int rc = 0;
1353
1354         if (list_empty(&ioc->sas_device_list))
1355                 return rc;
1356
1357         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1358         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1359                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1360                     btdh->handle == sas_device->handle) {
1361                         btdh->bus = sas_device->channel;
1362                         btdh->id = sas_device->id;
1363                         rc = 1;
1364                         goto out;
1365                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1366                     sas_device->id && btdh->handle == 0xFFFF) {
1367                         btdh->handle = sas_device->handle;
1368                         rc = 1;
1369                         goto out;
1370                 }
1371         }
1372  out:
1373         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1374         return rc;
1375 }
1376
1377 /**
1378  * _ctl_btdh_search_pcie_device - searching for pcie device
1379  * @ioc: per adapter object
1380  * @btdh: btdh ioctl payload
1381  */
1382 static int
1383 _ctl_btdh_search_pcie_device(struct MPT3SAS_ADAPTER *ioc,
1384         struct mpt3_ioctl_btdh_mapping *btdh)
1385 {
1386         struct _pcie_device *pcie_device;
1387         unsigned long flags;
1388         int rc = 0;
1389
1390         if (list_empty(&ioc->pcie_device_list))
1391                 return rc;
1392
1393         spin_lock_irqsave(&ioc->pcie_device_lock, flags);
1394         list_for_each_entry(pcie_device, &ioc->pcie_device_list, list) {
1395                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1396                            btdh->handle == pcie_device->handle) {
1397                         btdh->bus = pcie_device->channel;
1398                         btdh->id = pcie_device->id;
1399                         rc = 1;
1400                         goto out;
1401                 } else if (btdh->bus == pcie_device->channel && btdh->id ==
1402                            pcie_device->id && btdh->handle == 0xFFFF) {
1403                         btdh->handle = pcie_device->handle;
1404                         rc = 1;
1405                         goto out;
1406                 }
1407         }
1408  out:
1409         spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
1410         return rc;
1411 }
1412
1413 /**
1414  * _ctl_btdh_search_raid_device - searching for raid device
1415  * @ioc: per adapter object
1416  * @btdh: btdh ioctl payload
1417  */
1418 static int
1419 _ctl_btdh_search_raid_device(struct MPT3SAS_ADAPTER *ioc,
1420         struct mpt3_ioctl_btdh_mapping *btdh)
1421 {
1422         struct _raid_device *raid_device;
1423         unsigned long flags;
1424         int rc = 0;
1425
1426         if (list_empty(&ioc->raid_device_list))
1427                 return rc;
1428
1429         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1430         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1431                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1432                     btdh->handle == raid_device->handle) {
1433                         btdh->bus = raid_device->channel;
1434                         btdh->id = raid_device->id;
1435                         rc = 1;
1436                         goto out;
1437                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1438                     raid_device->id && btdh->handle == 0xFFFF) {
1439                         btdh->handle = raid_device->handle;
1440                         rc = 1;
1441                         goto out;
1442                 }
1443         }
1444  out:
1445         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1446         return rc;
1447 }
1448
1449 /**
1450  * _ctl_btdh_mapping - main handler for MPT3BTDHMAPPING opcode
1451  * @ioc: per adapter object
1452  * @arg: user space buffer containing ioctl content
1453  */
1454 static long
1455 _ctl_btdh_mapping(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1456 {
1457         struct mpt3_ioctl_btdh_mapping karg;
1458         int rc;
1459
1460         if (copy_from_user(&karg, arg, sizeof(karg))) {
1461                 pr_err("failure at %s:%d/%s()!\n",
1462                     __FILE__, __LINE__, __func__);
1463                 return -EFAULT;
1464         }
1465
1466         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1467                                  __func__));
1468
1469         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1470         if (!rc)
1471                 rc = _ctl_btdh_search_pcie_device(ioc, &karg);
1472         if (!rc)
1473                 _ctl_btdh_search_raid_device(ioc, &karg);
1474
1475         if (copy_to_user(arg, &karg, sizeof(karg))) {
1476                 pr_err("failure at %s:%d/%s()!\n",
1477                     __FILE__, __LINE__, __func__);
1478                 return -EFAULT;
1479         }
1480         return 0;
1481 }
1482
1483 /**
1484  * _ctl_diag_capability - return diag buffer capability
1485  * @ioc: per adapter object
1486  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1487  *
1488  * returns 1 when diag buffer support is enabled in firmware
1489  */
1490 static u8
1491 _ctl_diag_capability(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type)
1492 {
1493         u8 rc = 0;
1494
1495         switch (buffer_type) {
1496         case MPI2_DIAG_BUF_TYPE_TRACE:
1497                 if (ioc->facts.IOCCapabilities &
1498                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1499                         rc = 1;
1500                 break;
1501         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1502                 if (ioc->facts.IOCCapabilities &
1503                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1504                         rc = 1;
1505                 break;
1506         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1507                 if (ioc->facts.IOCCapabilities &
1508                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1509                         rc = 1;
1510         }
1511
1512         return rc;
1513 }
1514
1515 /**
1516  * _ctl_diag_get_bufftype - return diag buffer type
1517  *              either TRACE, SNAPSHOT, or EXTENDED
1518  * @ioc: per adapter object
1519  * @unique_id: specifies the unique_id for the buffer
1520  *
1521  * returns MPT3_DIAG_UID_NOT_FOUND if the id not found
1522  */
1523 static u8
1524 _ctl_diag_get_bufftype(struct MPT3SAS_ADAPTER *ioc, u32 unique_id)
1525 {
1526         u8  index;
1527
1528         for (index = 0; index < MPI2_DIAG_BUF_TYPE_COUNT; index++) {
1529                 if (ioc->unique_id[index] == unique_id)
1530                         return index;
1531         }
1532
1533         return MPT3_DIAG_UID_NOT_FOUND;
1534 }
1535
1536 /**
1537  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1538  * @ioc: per adapter object
1539  * @diag_register: the diag_register struct passed in from user space
1540  *
1541  */
1542 static long
1543 _ctl_diag_register_2(struct MPT3SAS_ADAPTER *ioc,
1544         struct mpt3_diag_register *diag_register)
1545 {
1546         int rc, i;
1547         void *request_data = NULL;
1548         dma_addr_t request_data_dma;
1549         u32 request_data_sz = 0;
1550         Mpi2DiagBufferPostRequest_t *mpi_request;
1551         Mpi2DiagBufferPostReply_t *mpi_reply;
1552         u8 buffer_type;
1553         u16 smid;
1554         u16 ioc_status;
1555         u32 ioc_state;
1556         u8 issue_reset = 0;
1557
1558         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1559                                  __func__));
1560
1561         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
1562         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1563                 ioc_err(ioc, "%s: failed due to ioc not operational\n",
1564                         __func__);
1565                 rc = -EAGAIN;
1566                 goto out;
1567         }
1568
1569         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
1570                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
1571                 rc = -EAGAIN;
1572                 goto out;
1573         }
1574
1575         buffer_type = diag_register->buffer_type;
1576         if (!_ctl_diag_capability(ioc, buffer_type)) {
1577                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1578                         __func__, buffer_type);
1579                 return -EPERM;
1580         }
1581
1582         if (diag_register->unique_id == 0) {
1583                 ioc_err(ioc,
1584                     "%s: Invalid UID(0x%08x), buffer_type(0x%02x)\n", __func__,
1585                     diag_register->unique_id, buffer_type);
1586                 return -EINVAL;
1587         }
1588
1589         if ((ioc->diag_buffer_status[buffer_type] &
1590             MPT3_DIAG_BUFFER_IS_APP_OWNED) &&
1591             !(ioc->diag_buffer_status[buffer_type] &
1592             MPT3_DIAG_BUFFER_IS_RELEASED)) {
1593                 ioc_err(ioc,
1594                     "%s: buffer_type(0x%02x) is already registered by application with UID(0x%08x)\n",
1595                     __func__, buffer_type, ioc->unique_id[buffer_type]);
1596                 return -EINVAL;
1597         }
1598
1599         if (ioc->diag_buffer_status[buffer_type] &
1600             MPT3_DIAG_BUFFER_IS_REGISTERED) {
1601                 /*
1602                  * If driver posts buffer initially, then an application wants
1603                  * to Register that buffer (own it) without Releasing first,
1604                  * the application Register command MUST have the same buffer
1605                  * type and size in the Register command (obtained from the
1606                  * Query command). Otherwise that Register command will be
1607                  * failed. If the application has released the buffer but wants
1608                  * to re-register it, it should be allowed as long as the
1609                  * Unique-Id/Size match.
1610                  */
1611
1612                 if (ioc->unique_id[buffer_type] == MPT3DIAGBUFFUNIQUEID &&
1613                     ioc->diag_buffer_sz[buffer_type] ==
1614                     diag_register->requested_buffer_size) {
1615
1616                         if (!(ioc->diag_buffer_status[buffer_type] &
1617                              MPT3_DIAG_BUFFER_IS_RELEASED)) {
1618                                 dctlprintk(ioc, ioc_info(ioc,
1619                                     "%s: diag_buffer (%d) ownership changed. old-ID(0x%08x), new-ID(0x%08x)\n",
1620                                     __func__, buffer_type,
1621                                     ioc->unique_id[buffer_type],
1622                                     diag_register->unique_id));
1623
1624                                 /*
1625                                  * Application wants to own the buffer with
1626                                  * the same size.
1627                                  */
1628                                 ioc->unique_id[buffer_type] =
1629                                     diag_register->unique_id;
1630                                 rc = 0; /* success */
1631                                 goto out;
1632                         }
1633                 } else if (ioc->unique_id[buffer_type] !=
1634                     MPT3DIAGBUFFUNIQUEID) {
1635                         if (ioc->unique_id[buffer_type] !=
1636                             diag_register->unique_id ||
1637                             ioc->diag_buffer_sz[buffer_type] !=
1638                             diag_register->requested_buffer_size ||
1639                             !(ioc->diag_buffer_status[buffer_type] &
1640                             MPT3_DIAG_BUFFER_IS_RELEASED)) {
1641                                 ioc_err(ioc,
1642                                     "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1643                                     __func__, buffer_type);
1644                                 return -EINVAL;
1645                         }
1646                 } else {
1647                         ioc_err(ioc, "%s: already has a registered buffer for buffer_type(0x%02x)\n",
1648                             __func__, buffer_type);
1649                         return -EINVAL;
1650                 }
1651         } else if (ioc->diag_buffer_status[buffer_type] &
1652             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
1653
1654                 if (ioc->unique_id[buffer_type] != MPT3DIAGBUFFUNIQUEID ||
1655                     ioc->diag_buffer_sz[buffer_type] !=
1656                     diag_register->requested_buffer_size) {
1657
1658                         ioc_err(ioc,
1659                             "%s: already a buffer is allocated for buffer_type(0x%02x) of size %d bytes, so please try registering again with same size\n",
1660                              __func__, buffer_type,
1661                             ioc->diag_buffer_sz[buffer_type]);
1662                         return -EINVAL;
1663                 }
1664         }
1665
1666         if (diag_register->requested_buffer_size % 4)  {
1667                 ioc_err(ioc, "%s: the requested_buffer_size is not 4 byte aligned\n",
1668                         __func__);
1669                 return -EINVAL;
1670         }
1671
1672         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1673         if (!smid) {
1674                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
1675                 rc = -EAGAIN;
1676                 goto out;
1677         }
1678
1679         rc = 0;
1680         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
1681         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1682         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
1683         ioc->ctl_cmds.smid = smid;
1684
1685         request_data = ioc->diag_buffer[buffer_type];
1686         request_data_sz = diag_register->requested_buffer_size;
1687         ioc->unique_id[buffer_type] = diag_register->unique_id;
1688         ioc->diag_buffer_status[buffer_type] &=
1689             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1690         memcpy(ioc->product_specific[buffer_type],
1691             diag_register->product_specific, MPT3_PRODUCT_SPECIFIC_DWORDS);
1692         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1693
1694         if (request_data) {
1695                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1696                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1697                         dma_free_coherent(&ioc->pdev->dev,
1698                                         ioc->diag_buffer_sz[buffer_type],
1699                                         request_data, request_data_dma);
1700                         request_data = NULL;
1701                 }
1702         }
1703
1704         if (request_data == NULL) {
1705                 ioc->diag_buffer_sz[buffer_type] = 0;
1706                 ioc->diag_buffer_dma[buffer_type] = 0;
1707                 request_data = dma_alloc_coherent(&ioc->pdev->dev,
1708                                 request_data_sz, &request_data_dma, GFP_KERNEL);
1709                 if (request_data == NULL) {
1710                         ioc_err(ioc, "%s: failed allocating memory for diag buffers, requested size(%d)\n",
1711                                 __func__, request_data_sz);
1712                         mpt3sas_base_free_smid(ioc, smid);
1713                         rc = -ENOMEM;
1714                         goto out;
1715                 }
1716                 ioc->diag_buffer[buffer_type] = request_data;
1717                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1718                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1719         }
1720
1721         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1722         mpi_request->BufferType = diag_register->buffer_type;
1723         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1724         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1725         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1726         mpi_request->VF_ID = 0; /* TODO */
1727         mpi_request->VP_ID = 0;
1728
1729         dctlprintk(ioc,
1730                    ioc_info(ioc, "%s: diag_buffer(0x%p), dma(0x%llx), sz(%d)\n",
1731                             __func__, request_data,
1732                             (unsigned long long)request_data_dma,
1733                             le32_to_cpu(mpi_request->BufferLength)));
1734
1735         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
1736                 mpi_request->ProductSpecific[i] =
1737                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1738
1739         init_completion(&ioc->ctl_cmds.done);
1740         ioc->put_smid_default(ioc, smid);
1741         wait_for_completion_timeout(&ioc->ctl_cmds.done,
1742             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
1743
1744         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
1745                 mpt3sas_check_cmd_timeout(ioc,
1746                     ioc->ctl_cmds.status, mpi_request,
1747                     sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
1748                 goto issue_host_reset;
1749         }
1750
1751         /* process the completed Reply Message Frame */
1752         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
1753                 ioc_err(ioc, "%s: no reply message\n", __func__);
1754                 rc = -EFAULT;
1755                 goto out;
1756         }
1757
1758         mpi_reply = ioc->ctl_cmds.reply;
1759         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1760
1761         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1762                 ioc->diag_buffer_status[buffer_type] |=
1763                         MPT3_DIAG_BUFFER_IS_REGISTERED;
1764                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
1765         } else {
1766                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
1767                          __func__,
1768                          ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1769                 rc = -EFAULT;
1770         }
1771
1772  issue_host_reset:
1773         if (issue_reset)
1774                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
1775
1776  out:
1777
1778         if (rc && request_data) {
1779                 dma_free_coherent(&ioc->pdev->dev, request_data_sz,
1780                     request_data, request_data_dma);
1781                 ioc->diag_buffer_status[buffer_type] &=
1782                     ~MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1783         }
1784
1785         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
1786         return rc;
1787 }
1788
1789 /**
1790  * mpt3sas_enable_diag_buffer - enabling diag_buffers support driver load time
1791  * @ioc: per adapter object
1792  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1793  *
1794  * This is called when command line option diag_buffer_enable is enabled
1795  * at driver load time.
1796  */
1797 void
1798 mpt3sas_enable_diag_buffer(struct MPT3SAS_ADAPTER *ioc, u8 bits_to_register)
1799 {
1800         struct mpt3_diag_register diag_register;
1801         u32 ret_val;
1802         u32 trace_buff_size = ioc->manu_pg11.HostTraceBufferMaxSizeKB<<10;
1803         u32 min_trace_buff_size = 0;
1804         u32 decr_trace_buff_size = 0;
1805
1806         memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
1807
1808         if (bits_to_register & 1) {
1809                 ioc_info(ioc, "registering trace buffer support\n");
1810                 ioc->diag_trigger_master.MasterData =
1811                     (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
1812                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1813                 diag_register.unique_id =
1814                     (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
1815                     (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
1816
1817                 if (trace_buff_size != 0) {
1818                         diag_register.requested_buffer_size = trace_buff_size;
1819                         min_trace_buff_size =
1820                             ioc->manu_pg11.HostTraceBufferMinSizeKB<<10;
1821                         decr_trace_buff_size =
1822                             ioc->manu_pg11.HostTraceBufferDecrementSizeKB<<10;
1823
1824                         if (min_trace_buff_size > trace_buff_size) {
1825                                 /* The buff size is not set correctly */
1826                                 ioc_err(ioc,
1827                                     "Min Trace Buff size (%d KB) greater than Max Trace Buff size (%d KB)\n",
1828                                      min_trace_buff_size>>10,
1829                                      trace_buff_size>>10);
1830                                 ioc_err(ioc,
1831                                     "Using zero Min Trace Buff Size\n");
1832                                 min_trace_buff_size = 0;
1833                         }
1834
1835                         if (decr_trace_buff_size == 0) {
1836                                 /*
1837                                  * retry the min size if decrement
1838                                  * is not available.
1839                                  */
1840                                 decr_trace_buff_size =
1841                                     trace_buff_size - min_trace_buff_size;
1842                         }
1843                 } else {
1844                         /* register for 2MB buffers  */
1845                         diag_register.requested_buffer_size = 2 * (1024 * 1024);
1846                 }
1847
1848                 do {
1849                         ret_val = _ctl_diag_register_2(ioc,  &diag_register);
1850
1851                         if (ret_val == -ENOMEM && min_trace_buff_size &&
1852                             (trace_buff_size - decr_trace_buff_size) >=
1853                             min_trace_buff_size) {
1854                                 /* adjust the buffer size */
1855                                 trace_buff_size -= decr_trace_buff_size;
1856                                 diag_register.requested_buffer_size =
1857                                     trace_buff_size;
1858                         } else
1859                                 break;
1860                 } while (true);
1861
1862                 if (ret_val == -ENOMEM)
1863                         ioc_err(ioc,
1864                             "Cannot allocate trace buffer memory. Last memory tried = %d KB\n",
1865                             diag_register.requested_buffer_size>>10);
1866                 else if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE]
1867                     & MPT3_DIAG_BUFFER_IS_REGISTERED) {
1868                         ioc_err(ioc, "Trace buffer memory %d KB allocated\n",
1869                             diag_register.requested_buffer_size>>10);
1870                         if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
1871                                 ioc->diag_buffer_status[
1872                                     MPI2_DIAG_BUF_TYPE_TRACE] |=
1873                                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
1874                 }
1875         }
1876
1877         if (bits_to_register & 2) {
1878                 ioc_info(ioc, "registering snapshot buffer support\n");
1879                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1880                 /* register for 2MB buffers  */
1881                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1882                 diag_register.unique_id = 0x7075901;
1883                 _ctl_diag_register_2(ioc,  &diag_register);
1884         }
1885
1886         if (bits_to_register & 4) {
1887                 ioc_info(ioc, "registering extended buffer support\n");
1888                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1889                 /* register for 2MB buffers  */
1890                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1891                 diag_register.unique_id = 0x7075901;
1892                 _ctl_diag_register_2(ioc,  &diag_register);
1893         }
1894 }
1895
1896 /**
1897  * _ctl_diag_register - application register with driver
1898  * @ioc: per adapter object
1899  * @arg: user space buffer containing ioctl content
1900  *
1901  * This will allow the driver to setup any required buffers that will be
1902  * needed by firmware to communicate with the driver.
1903  */
1904 static long
1905 _ctl_diag_register(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1906 {
1907         struct mpt3_diag_register karg;
1908         long rc;
1909
1910         if (copy_from_user(&karg, arg, sizeof(karg))) {
1911                 pr_err("failure at %s:%d/%s()!\n",
1912                     __FILE__, __LINE__, __func__);
1913                 return -EFAULT;
1914         }
1915
1916         rc = _ctl_diag_register_2(ioc, &karg);
1917
1918         if (!rc && (ioc->diag_buffer_status[karg.buffer_type] &
1919             MPT3_DIAG_BUFFER_IS_REGISTERED))
1920                 ioc->diag_buffer_status[karg.buffer_type] |=
1921                     MPT3_DIAG_BUFFER_IS_APP_OWNED;
1922
1923         return rc;
1924 }
1925
1926 /**
1927  * _ctl_diag_unregister - application unregister with driver
1928  * @ioc: per adapter object
1929  * @arg: user space buffer containing ioctl content
1930  *
1931  * This will allow the driver to cleanup any memory allocated for diag
1932  * messages and to free up any resources.
1933  */
1934 static long
1935 _ctl_diag_unregister(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
1936 {
1937         struct mpt3_diag_unregister karg;
1938         void *request_data;
1939         dma_addr_t request_data_dma;
1940         u32 request_data_sz;
1941         u8 buffer_type;
1942
1943         if (copy_from_user(&karg, arg, sizeof(karg))) {
1944                 pr_err("failure at %s:%d/%s()!\n",
1945                     __FILE__, __LINE__, __func__);
1946                 return -EFAULT;
1947         }
1948
1949         dctlprintk(ioc, ioc_info(ioc, "%s\n",
1950                                  __func__));
1951
1952         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
1953         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
1954                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
1955                     __func__, karg.unique_id);
1956                 return -EINVAL;
1957         }
1958
1959         if (!_ctl_diag_capability(ioc, buffer_type)) {
1960                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
1961                         __func__, buffer_type);
1962                 return -EPERM;
1963         }
1964
1965         if ((ioc->diag_buffer_status[buffer_type] &
1966             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
1967                 ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
1968                         __func__, buffer_type);
1969                 return -EINVAL;
1970         }
1971         if ((ioc->diag_buffer_status[buffer_type] &
1972             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
1973                 ioc_err(ioc, "%s: buffer_type(0x%02x) has not been released\n",
1974                         __func__, buffer_type);
1975                 return -EINVAL;
1976         }
1977
1978         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1979                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
1980                         __func__, karg.unique_id);
1981                 return -EINVAL;
1982         }
1983
1984         request_data = ioc->diag_buffer[buffer_type];
1985         if (!request_data) {
1986                 ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
1987                         __func__, buffer_type);
1988                 return -ENOMEM;
1989         }
1990
1991         if (ioc->diag_buffer_status[buffer_type] &
1992             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED) {
1993                 ioc->unique_id[buffer_type] = MPT3DIAGBUFFUNIQUEID;
1994                 ioc->diag_buffer_status[buffer_type] &=
1995                     ~MPT3_DIAG_BUFFER_IS_APP_OWNED;
1996                 ioc->diag_buffer_status[buffer_type] &=
1997                     ~MPT3_DIAG_BUFFER_IS_REGISTERED;
1998         } else {
1999                 request_data_sz = ioc->diag_buffer_sz[buffer_type];
2000                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
2001                 dma_free_coherent(&ioc->pdev->dev, request_data_sz,
2002                                 request_data, request_data_dma);
2003                 ioc->diag_buffer[buffer_type] = NULL;
2004                 ioc->diag_buffer_status[buffer_type] = 0;
2005         }
2006         return 0;
2007 }
2008
2009 /**
2010  * _ctl_diag_query - query relevant info associated with diag buffers
2011  * @ioc: per adapter object
2012  * @arg: user space buffer containing ioctl content
2013  *
2014  * The application will send only buffer_type and unique_id.  Driver will
2015  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
2016  * 0x00, the driver will return info specified by Buffer Type.
2017  */
2018 static long
2019 _ctl_diag_query(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2020 {
2021         struct mpt3_diag_query karg;
2022         void *request_data;
2023         int i;
2024         u8 buffer_type;
2025
2026         if (copy_from_user(&karg, arg, sizeof(karg))) {
2027                 pr_err("failure at %s:%d/%s()!\n",
2028                     __FILE__, __LINE__, __func__);
2029                 return -EFAULT;
2030         }
2031
2032         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2033                                  __func__));
2034
2035         karg.application_flags = 0;
2036         buffer_type = karg.buffer_type;
2037
2038         if (!_ctl_diag_capability(ioc, buffer_type)) {
2039                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2040                         __func__, buffer_type);
2041                 return -EPERM;
2042         }
2043
2044         if (!(ioc->diag_buffer_status[buffer_type] &
2045             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED)) {
2046                 if ((ioc->diag_buffer_status[buffer_type] &
2047                     MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2048                         ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2049                                 __func__, buffer_type);
2050                         return -EINVAL;
2051                 }
2052         }
2053
2054         if (karg.unique_id) {
2055                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
2056                         ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2057                                 __func__, karg.unique_id);
2058                         return -EINVAL;
2059                 }
2060         }
2061
2062         request_data = ioc->diag_buffer[buffer_type];
2063         if (!request_data) {
2064                 ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2065                         __func__, buffer_type);
2066                 return -ENOMEM;
2067         }
2068
2069         if ((ioc->diag_buffer_status[buffer_type] &
2070             MPT3_DIAG_BUFFER_IS_REGISTERED))
2071                 karg.application_flags |= MPT3_APP_FLAGS_BUFFER_VALID;
2072
2073         if (!(ioc->diag_buffer_status[buffer_type] &
2074              MPT3_DIAG_BUFFER_IS_RELEASED))
2075                 karg.application_flags |= MPT3_APP_FLAGS_FW_BUFFER_ACCESS;
2076
2077         if (!(ioc->diag_buffer_status[buffer_type] &
2078             MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED))
2079                 karg.application_flags |= MPT3_APP_FLAGS_DYNAMIC_BUFFER_ALLOC;
2080
2081         if ((ioc->diag_buffer_status[buffer_type] &
2082             MPT3_DIAG_BUFFER_IS_APP_OWNED))
2083                 karg.application_flags |= MPT3_APP_FLAGS_APP_OWNED;
2084
2085         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2086                 karg.product_specific[i] =
2087                     ioc->product_specific[buffer_type][i];
2088
2089         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
2090         karg.driver_added_buffer_size = 0;
2091         karg.unique_id = ioc->unique_id[buffer_type];
2092         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
2093
2094         if (copy_to_user(arg, &karg, sizeof(struct mpt3_diag_query))) {
2095                 ioc_err(ioc, "%s: unable to write mpt3_diag_query data @ %p\n",
2096                         __func__, arg);
2097                 return -EFAULT;
2098         }
2099         return 0;
2100 }
2101
2102 /**
2103  * mpt3sas_send_diag_release - Diag Release Message
2104  * @ioc: per adapter object
2105  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
2106  * @issue_reset: specifies whether host reset is required.
2107  *
2108  */
2109 int
2110 mpt3sas_send_diag_release(struct MPT3SAS_ADAPTER *ioc, u8 buffer_type,
2111         u8 *issue_reset)
2112 {
2113         Mpi2DiagReleaseRequest_t *mpi_request;
2114         Mpi2DiagReleaseReply_t *mpi_reply;
2115         u16 smid;
2116         u16 ioc_status;
2117         u32 ioc_state;
2118         int rc;
2119         u8 reset_needed = 0;
2120
2121         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2122                                  __func__));
2123
2124         rc = 0;
2125         *issue_reset = 0;
2126
2127
2128         ioc_state = mpt3sas_base_get_iocstate(ioc, 1);
2129         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2130                 if (ioc->diag_buffer_status[buffer_type] &
2131                     MPT3_DIAG_BUFFER_IS_REGISTERED)
2132                         ioc->diag_buffer_status[buffer_type] |=
2133                             MPT3_DIAG_BUFFER_IS_RELEASED;
2134                 dctlprintk(ioc,
2135                            ioc_info(ioc, "%s: skipping due to FAULT state\n",
2136                                     __func__));
2137                 rc = -EAGAIN;
2138                 goto out;
2139         }
2140
2141         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2142                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2143                 rc = -EAGAIN;
2144                 goto out;
2145         }
2146
2147         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2148         if (!smid) {
2149                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2150                 rc = -EAGAIN;
2151                 goto out;
2152         }
2153
2154         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2155         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2156         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2157         ioc->ctl_cmds.smid = smid;
2158
2159         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
2160         mpi_request->BufferType = buffer_type;
2161         mpi_request->VF_ID = 0; /* TODO */
2162         mpi_request->VP_ID = 0;
2163
2164         init_completion(&ioc->ctl_cmds.done);
2165         ioc->put_smid_default(ioc, smid);
2166         wait_for_completion_timeout(&ioc->ctl_cmds.done,
2167             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2168
2169         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2170                 mpt3sas_check_cmd_timeout(ioc,
2171                     ioc->ctl_cmds.status, mpi_request,
2172                     sizeof(Mpi2DiagReleaseRequest_t)/4, reset_needed);
2173                  *issue_reset = reset_needed;
2174                 rc = -EFAULT;
2175                 goto out;
2176         }
2177
2178         /* process the completed Reply Message Frame */
2179         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2180                 ioc_err(ioc, "%s: no reply message\n", __func__);
2181                 rc = -EFAULT;
2182                 goto out;
2183         }
2184
2185         mpi_reply = ioc->ctl_cmds.reply;
2186         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2187
2188         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2189                 ioc->diag_buffer_status[buffer_type] |=
2190                     MPT3_DIAG_BUFFER_IS_RELEASED;
2191                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2192         } else {
2193                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2194                          __func__,
2195                          ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2196                 rc = -EFAULT;
2197         }
2198
2199  out:
2200         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2201         return rc;
2202 }
2203
2204 /**
2205  * _ctl_diag_release - request to send Diag Release Message to firmware
2206  * @ioc: ?
2207  * @arg: user space buffer containing ioctl content
2208  *
2209  * This allows ownership of the specified buffer to returned to the driver,
2210  * allowing an application to read the buffer without fear that firmware is
2211  * overwriting information in the buffer.
2212  */
2213 static long
2214 _ctl_diag_release(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2215 {
2216         struct mpt3_diag_release karg;
2217         void *request_data;
2218         int rc;
2219         u8 buffer_type;
2220         u8 issue_reset = 0;
2221
2222         if (copy_from_user(&karg, arg, sizeof(karg))) {
2223                 pr_err("failure at %s:%d/%s()!\n",
2224                     __FILE__, __LINE__, __func__);
2225                 return -EFAULT;
2226         }
2227
2228         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2229                                  __func__));
2230
2231         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2232         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2233                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2234                     __func__, karg.unique_id);
2235                 return -EINVAL;
2236         }
2237
2238         if (!_ctl_diag_capability(ioc, buffer_type)) {
2239                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2240                         __func__, buffer_type);
2241                 return -EPERM;
2242         }
2243
2244         if ((ioc->diag_buffer_status[buffer_type] &
2245             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
2246                 ioc_err(ioc, "%s: buffer_type(0x%02x) is not registered\n",
2247                         __func__, buffer_type);
2248                 return -EINVAL;
2249         }
2250
2251         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2252                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2253                         __func__, karg.unique_id);
2254                 return -EINVAL;
2255         }
2256
2257         if (ioc->diag_buffer_status[buffer_type] &
2258             MPT3_DIAG_BUFFER_IS_RELEASED) {
2259                 ioc_err(ioc, "%s: buffer_type(0x%02x) is already released\n",
2260                         __func__, buffer_type);
2261                 return -EINVAL;
2262         }
2263
2264         request_data = ioc->diag_buffer[buffer_type];
2265
2266         if (!request_data) {
2267                 ioc_err(ioc, "%s: doesn't have memory allocated for buffer_type(0x%02x)\n",
2268                         __func__, buffer_type);
2269                 return -ENOMEM;
2270         }
2271
2272         /* buffers were released by due to host reset */
2273         if ((ioc->diag_buffer_status[buffer_type] &
2274             MPT3_DIAG_BUFFER_IS_DIAG_RESET)) {
2275                 ioc->diag_buffer_status[buffer_type] |=
2276                     MPT3_DIAG_BUFFER_IS_RELEASED;
2277                 ioc->diag_buffer_status[buffer_type] &=
2278                     ~MPT3_DIAG_BUFFER_IS_DIAG_RESET;
2279                 ioc_err(ioc, "%s: buffer_type(0x%02x) was released due to host reset\n",
2280                         __func__, buffer_type);
2281                 return 0;
2282         }
2283
2284         rc = mpt3sas_send_diag_release(ioc, buffer_type, &issue_reset);
2285
2286         if (issue_reset)
2287                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2288
2289         return rc;
2290 }
2291
2292 /**
2293  * _ctl_diag_read_buffer - request for copy of the diag buffer
2294  * @ioc: per adapter object
2295  * @arg: user space buffer containing ioctl content
2296  */
2297 static long
2298 _ctl_diag_read_buffer(struct MPT3SAS_ADAPTER *ioc, void __user *arg)
2299 {
2300         struct mpt3_diag_read_buffer karg;
2301         struct mpt3_diag_read_buffer __user *uarg = arg;
2302         void *request_data, *diag_data;
2303         Mpi2DiagBufferPostRequest_t *mpi_request;
2304         Mpi2DiagBufferPostReply_t *mpi_reply;
2305         int rc, i;
2306         u8 buffer_type;
2307         unsigned long request_size, copy_size;
2308         u16 smid;
2309         u16 ioc_status;
2310         u8 issue_reset = 0;
2311
2312         if (copy_from_user(&karg, arg, sizeof(karg))) {
2313                 pr_err("failure at %s:%d/%s()!\n",
2314                     __FILE__, __LINE__, __func__);
2315                 return -EFAULT;
2316         }
2317
2318         dctlprintk(ioc, ioc_info(ioc, "%s\n",
2319                                  __func__));
2320
2321         buffer_type = _ctl_diag_get_bufftype(ioc, karg.unique_id);
2322         if (buffer_type == MPT3_DIAG_UID_NOT_FOUND) {
2323                 ioc_err(ioc, "%s: buffer with unique_id(0x%08x) not found\n",
2324                     __func__, karg.unique_id);
2325                 return -EINVAL;
2326         }
2327
2328         if (!_ctl_diag_capability(ioc, buffer_type)) {
2329                 ioc_err(ioc, "%s: doesn't have capability for buffer_type(0x%02x)\n",
2330                         __func__, buffer_type);
2331                 return -EPERM;
2332         }
2333
2334         if (karg.unique_id != ioc->unique_id[buffer_type]) {
2335                 ioc_err(ioc, "%s: unique_id(0x%08x) is not registered\n",
2336                         __func__, karg.unique_id);
2337                 return -EINVAL;
2338         }
2339
2340         request_data = ioc->diag_buffer[buffer_type];
2341         if (!request_data) {
2342                 ioc_err(ioc, "%s: doesn't have buffer for buffer_type(0x%02x)\n",
2343                         __func__, buffer_type);
2344                 return -ENOMEM;
2345         }
2346
2347         request_size = ioc->diag_buffer_sz[buffer_type];
2348
2349         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
2350                 ioc_err(ioc, "%s: either the starting_offset or bytes_to_read are not 4 byte aligned\n",
2351                         __func__);
2352                 return -EINVAL;
2353         }
2354
2355         if (karg.starting_offset > request_size)
2356                 return -EINVAL;
2357
2358         diag_data = (void *)(request_data + karg.starting_offset);
2359         dctlprintk(ioc,
2360                    ioc_info(ioc, "%s: diag_buffer(%p), offset(%d), sz(%d)\n",
2361                             __func__, diag_data, karg.starting_offset,
2362                             karg.bytes_to_read));
2363
2364         /* Truncate data on requests that are too large */
2365         if ((diag_data + karg.bytes_to_read < diag_data) ||
2366             (diag_data + karg.bytes_to_read > request_data + request_size))
2367                 copy_size = request_size - karg.starting_offset;
2368         else
2369                 copy_size = karg.bytes_to_read;
2370
2371         if (copy_to_user((void __user *)uarg->diagnostic_data,
2372             diag_data, copy_size)) {
2373                 ioc_err(ioc, "%s: Unable to write mpt_diag_read_buffer_t data @ %p\n",
2374                         __func__, diag_data);
2375                 return -EFAULT;
2376         }
2377
2378         if ((karg.flags & MPT3_FLAGS_REREGISTER) == 0)
2379                 return 0;
2380
2381         dctlprintk(ioc,
2382                    ioc_info(ioc, "%s: Reregister buffer_type(0x%02x)\n",
2383                             __func__, buffer_type));
2384         if ((ioc->diag_buffer_status[buffer_type] &
2385             MPT3_DIAG_BUFFER_IS_RELEASED) == 0) {
2386                 dctlprintk(ioc,
2387                            ioc_info(ioc, "%s: buffer_type(0x%02x) is still registered\n",
2388                                     __func__, buffer_type));
2389                 return 0;
2390         }
2391         /* Get a free request frame and save the message context.
2392         */
2393
2394         if (ioc->ctl_cmds.status != MPT3_CMD_NOT_USED) {
2395                 ioc_err(ioc, "%s: ctl_cmd in use\n", __func__);
2396                 rc = -EAGAIN;
2397                 goto out;
2398         }
2399
2400         smid = mpt3sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2401         if (!smid) {
2402                 ioc_err(ioc, "%s: failed obtaining a smid\n", __func__);
2403                 rc = -EAGAIN;
2404                 goto out;
2405         }
2406
2407         rc = 0;
2408         ioc->ctl_cmds.status = MPT3_CMD_PENDING;
2409         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2410         mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
2411         ioc->ctl_cmds.smid = smid;
2412
2413         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2414         mpi_request->BufferType = buffer_type;
2415         mpi_request->BufferLength =
2416             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2417         mpi_request->BufferAddress =
2418             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2419         for (i = 0; i < MPT3_PRODUCT_SPECIFIC_DWORDS; i++)
2420                 mpi_request->ProductSpecific[i] =
2421                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2422         mpi_request->VF_ID = 0; /* TODO */
2423         mpi_request->VP_ID = 0;
2424
2425         init_completion(&ioc->ctl_cmds.done);
2426         ioc->put_smid_default(ioc, smid);
2427         wait_for_completion_timeout(&ioc->ctl_cmds.done,
2428             MPT3_IOCTL_DEFAULT_TIMEOUT*HZ);
2429
2430         if (!(ioc->ctl_cmds.status & MPT3_CMD_COMPLETE)) {
2431                 mpt3sas_check_cmd_timeout(ioc,
2432                     ioc->ctl_cmds.status, mpi_request,
2433                     sizeof(Mpi2DiagBufferPostRequest_t)/4, issue_reset);
2434                 goto issue_host_reset;
2435         }
2436
2437         /* process the completed Reply Message Frame */
2438         if ((ioc->ctl_cmds.status & MPT3_CMD_REPLY_VALID) == 0) {
2439                 ioc_err(ioc, "%s: no reply message\n", __func__);
2440                 rc = -EFAULT;
2441                 goto out;
2442         }
2443
2444         mpi_reply = ioc->ctl_cmds.reply;
2445         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2446
2447         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2448                 ioc->diag_buffer_status[buffer_type] |=
2449                     MPT3_DIAG_BUFFER_IS_REGISTERED;
2450                 ioc->diag_buffer_status[buffer_type] &=
2451                     ~MPT3_DIAG_BUFFER_IS_RELEASED;
2452                 dctlprintk(ioc, ioc_info(ioc, "%s: success\n", __func__));
2453         } else {
2454                 ioc_info(ioc, "%s: ioc_status(0x%04x) log_info(0x%08x)\n",
2455                          __func__, ioc_status,
2456                          le32_to_cpu(mpi_reply->IOCLogInfo));
2457                 rc = -EFAULT;
2458         }
2459
2460  issue_host_reset:
2461         if (issue_reset)
2462                 mpt3sas_base_hard_reset_handler(ioc, FORCE_BIG_HAMMER);
2463
2464  out:
2465
2466         ioc->ctl_cmds.status = MPT3_CMD_NOT_USED;
2467         return rc;
2468 }
2469
2470
2471
2472 #ifdef CONFIG_COMPAT
2473 /**
2474  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2475  * @ioc: per adapter object
2476  * @cmd: ioctl opcode
2477  * @arg: (struct mpt3_ioctl_command32)
2478  *
2479  * MPT3COMMAND32 - Handle 32bit applications running on 64bit os.
2480  */
2481 static long
2482 _ctl_compat_mpt_command(struct MPT3SAS_ADAPTER *ioc, unsigned cmd,
2483         void __user *arg)
2484 {
2485         struct mpt3_ioctl_command32 karg32;
2486         struct mpt3_ioctl_command32 __user *uarg;
2487         struct mpt3_ioctl_command karg;
2488
2489         if (_IOC_SIZE(cmd) != sizeof(struct mpt3_ioctl_command32))
2490                 return -EINVAL;
2491
2492         uarg = (struct mpt3_ioctl_command32 __user *) arg;
2493
2494         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2495                 pr_err("failure at %s:%d/%s()!\n",
2496                     __FILE__, __LINE__, __func__);
2497                 return -EFAULT;
2498         }
2499
2500         memset(&karg, 0, sizeof(struct mpt3_ioctl_command));
2501         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2502         karg.hdr.port_number = karg32.hdr.port_number;
2503         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2504         karg.timeout = karg32.timeout;
2505         karg.max_reply_bytes = karg32.max_reply_bytes;
2506         karg.data_in_size = karg32.data_in_size;
2507         karg.data_out_size = karg32.data_out_size;
2508         karg.max_sense_bytes = karg32.max_sense_bytes;
2509         karg.data_sge_offset = karg32.data_sge_offset;
2510         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2511         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2512         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2513         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2514         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2515 }
2516 #endif
2517
2518 /**
2519  * _ctl_ioctl_main - main ioctl entry point
2520  * @file:  (struct file)
2521  * @cmd:  ioctl opcode
2522  * @arg:  user space data buffer
2523  * @compat:  handles 32 bit applications in 64bit os
2524  * @mpi_version: will be MPI2_VERSION for mpt2ctl ioctl device &
2525  * MPI25_VERSION | MPI26_VERSION for mpt3ctl ioctl device.
2526  */
2527 static long
2528 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2529         u8 compat, u16 mpi_version)
2530 {
2531         struct MPT3SAS_ADAPTER *ioc;
2532         struct mpt3_ioctl_header ioctl_header;
2533         enum block_state state;
2534         long ret = -EINVAL;
2535
2536         /* get IOCTL header */
2537         if (copy_from_user(&ioctl_header, (char __user *)arg,
2538             sizeof(struct mpt3_ioctl_header))) {
2539                 pr_err("failure at %s:%d/%s()!\n",
2540                     __FILE__, __LINE__, __func__);
2541                 return -EFAULT;
2542         }
2543
2544         if (_ctl_verify_adapter(ioctl_header.ioc_number,
2545                                 &ioc, mpi_version) == -1 || !ioc)
2546                 return -ENODEV;
2547
2548         /* pci_access_mutex lock acquired by ioctl path */
2549         mutex_lock(&ioc->pci_access_mutex);
2550
2551         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2552             ioc->is_driver_loading || ioc->remove_host) {
2553                 ret = -EAGAIN;
2554                 goto out_unlock_pciaccess;
2555         }
2556
2557         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2558         if (state == NON_BLOCKING) {
2559                 if (!mutex_trylock(&ioc->ctl_cmds.mutex)) {
2560                         ret = -EAGAIN;
2561                         goto out_unlock_pciaccess;
2562                 }
2563         } else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex)) {
2564                 ret = -ERESTARTSYS;
2565                 goto out_unlock_pciaccess;
2566         }
2567
2568
2569         switch (cmd) {
2570         case MPT3IOCINFO:
2571                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_iocinfo))
2572                         ret = _ctl_getiocinfo(ioc, arg);
2573                 break;
2574 #ifdef CONFIG_COMPAT
2575         case MPT3COMMAND32:
2576 #endif
2577         case MPT3COMMAND:
2578         {
2579                 struct mpt3_ioctl_command __user *uarg;
2580                 struct mpt3_ioctl_command karg;
2581
2582 #ifdef CONFIG_COMPAT
2583                 if (compat) {
2584                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2585                         break;
2586                 }
2587 #endif
2588                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2589                         pr_err("failure at %s:%d/%s()!\n",
2590                             __FILE__, __LINE__, __func__);
2591                         ret = -EFAULT;
2592                         break;
2593                 }
2594
2595                 if (karg.hdr.ioc_number != ioctl_header.ioc_number) {
2596                         ret = -EINVAL;
2597                         break;
2598                 }
2599                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_command)) {
2600                         uarg = arg;
2601                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2602                 }
2603                 break;
2604         }
2605         case MPT3EVENTQUERY:
2606                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventquery))
2607                         ret = _ctl_eventquery(ioc, arg);
2608                 break;
2609         case MPT3EVENTENABLE:
2610                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_eventenable))
2611                         ret = _ctl_eventenable(ioc, arg);
2612                 break;
2613         case MPT3EVENTREPORT:
2614                 ret = _ctl_eventreport(ioc, arg);
2615                 break;
2616         case MPT3HARDRESET:
2617                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_diag_reset))
2618                         ret = _ctl_do_reset(ioc, arg);
2619                 break;
2620         case MPT3BTDHMAPPING:
2621                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_ioctl_btdh_mapping))
2622                         ret = _ctl_btdh_mapping(ioc, arg);
2623                 break;
2624         case MPT3DIAGREGISTER:
2625                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_register))
2626                         ret = _ctl_diag_register(ioc, arg);
2627                 break;
2628         case MPT3DIAGUNREGISTER:
2629                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_unregister))
2630                         ret = _ctl_diag_unregister(ioc, arg);
2631                 break;
2632         case MPT3DIAGQUERY:
2633                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_query))
2634                         ret = _ctl_diag_query(ioc, arg);
2635                 break;
2636         case MPT3DIAGRELEASE:
2637                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_release))
2638                         ret = _ctl_diag_release(ioc, arg);
2639                 break;
2640         case MPT3DIAGREADBUFFER:
2641                 if (_IOC_SIZE(cmd) == sizeof(struct mpt3_diag_read_buffer))
2642                         ret = _ctl_diag_read_buffer(ioc, arg);
2643                 break;
2644         default:
2645                 dctlprintk(ioc,
2646                            ioc_info(ioc, "unsupported ioctl opcode(0x%08x)\n",
2647                                     cmd));
2648                 break;
2649         }
2650
2651         mutex_unlock(&ioc->ctl_cmds.mutex);
2652 out_unlock_pciaccess:
2653         mutex_unlock(&ioc->pci_access_mutex);
2654         return ret;
2655 }
2656
2657 /**
2658  * _ctl_ioctl - mpt3ctl main ioctl entry point (unlocked)
2659  * @file: (struct file)
2660  * @cmd: ioctl opcode
2661  * @arg: ?
2662  */
2663 static long
2664 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2665 {
2666         long ret;
2667
2668         /* pass MPI25_VERSION | MPI26_VERSION value,
2669          * to indicate that this ioctl cmd
2670          * came from mpt3ctl ioctl device.
2671          */
2672         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0,
2673                 MPI25_VERSION | MPI26_VERSION);
2674         return ret;
2675 }
2676
2677 /**
2678  * _ctl_mpt2_ioctl - mpt2ctl main ioctl entry point (unlocked)
2679  * @file: (struct file)
2680  * @cmd: ioctl opcode
2681  * @arg: ?
2682  */
2683 static long
2684 _ctl_mpt2_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2685 {
2686         long ret;
2687
2688         /* pass MPI2_VERSION value, to indicate that this ioctl cmd
2689          * came from mpt2ctl ioctl device.
2690          */
2691         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0, MPI2_VERSION);
2692         return ret;
2693 }
2694 #ifdef CONFIG_COMPAT
2695 /**
2696  *_ ctl_ioctl_compat - main ioctl entry point (compat)
2697  * @file: ?
2698  * @cmd: ?
2699  * @arg: ?
2700  *
2701  * This routine handles 32 bit applications in 64bit os.
2702  */
2703 static long
2704 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2705 {
2706         long ret;
2707
2708         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1,
2709                 MPI25_VERSION | MPI26_VERSION);
2710         return ret;
2711 }
2712
2713 /**
2714  *_ ctl_mpt2_ioctl_compat - main ioctl entry point (compat)
2715  * @file: ?
2716  * @cmd: ?
2717  * @arg: ?
2718  *
2719  * This routine handles 32 bit applications in 64bit os.
2720  */
2721 static long
2722 _ctl_mpt2_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2723 {
2724         long ret;
2725
2726         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1, MPI2_VERSION);
2727         return ret;
2728 }
2729 #endif
2730
2731 /* scsi host attributes */
2732 /**
2733  * version_fw_show - firmware version
2734  * @cdev: pointer to embedded class device
2735  * @attr: ?
2736  * @buf: the buffer returned
2737  *
2738  * A sysfs 'read-only' shost attribute.
2739  */
2740 static ssize_t
2741 version_fw_show(struct device *cdev, struct device_attribute *attr,
2742         char *buf)
2743 {
2744         struct Scsi_Host *shost = class_to_shost(cdev);
2745         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2746
2747         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2748             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2749             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2750             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2751             ioc->facts.FWVersion.Word & 0x000000FF);
2752 }
2753 static DEVICE_ATTR_RO(version_fw);
2754
2755 /**
2756  * version_bios_show - bios version
2757  * @cdev: pointer to embedded class device
2758  * @attr: ?
2759  * @buf: the buffer returned
2760  *
2761  * A sysfs 'read-only' shost attribute.
2762  */
2763 static ssize_t
2764 version_bios_show(struct device *cdev, struct device_attribute *attr,
2765         char *buf)
2766 {
2767         struct Scsi_Host *shost = class_to_shost(cdev);
2768         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2769
2770         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2771
2772         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2773             (version & 0xFF000000) >> 24,
2774             (version & 0x00FF0000) >> 16,
2775             (version & 0x0000FF00) >> 8,
2776             version & 0x000000FF);
2777 }
2778 static DEVICE_ATTR_RO(version_bios);
2779
2780 /**
2781  * version_mpi_show - MPI (message passing interface) version
2782  * @cdev: pointer to embedded class device
2783  * @attr: ?
2784  * @buf: the buffer returned
2785  *
2786  * A sysfs 'read-only' shost attribute.
2787  */
2788 static ssize_t
2789 version_mpi_show(struct device *cdev, struct device_attribute *attr,
2790         char *buf)
2791 {
2792         struct Scsi_Host *shost = class_to_shost(cdev);
2793         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2794
2795         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2796             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2797 }
2798 static DEVICE_ATTR_RO(version_mpi);
2799
2800 /**
2801  * version_product_show - product name
2802  * @cdev: pointer to embedded class device
2803  * @attr: ?
2804  * @buf: the buffer returned
2805  *
2806  * A sysfs 'read-only' shost attribute.
2807  */
2808 static ssize_t
2809 version_product_show(struct device *cdev, struct device_attribute *attr,
2810         char *buf)
2811 {
2812         struct Scsi_Host *shost = class_to_shost(cdev);
2813         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2814
2815         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2816 }
2817 static DEVICE_ATTR_RO(version_product);
2818
2819 /**
2820  * version_nvdata_persistent_show - ndvata persistent version
2821  * @cdev: pointer to embedded class device
2822  * @attr: ?
2823  * @buf: the buffer returned
2824  *
2825  * A sysfs 'read-only' shost attribute.
2826  */
2827 static ssize_t
2828 version_nvdata_persistent_show(struct device *cdev,
2829         struct device_attribute *attr, char *buf)
2830 {
2831         struct Scsi_Host *shost = class_to_shost(cdev);
2832         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2833
2834         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2835             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2836 }
2837 static DEVICE_ATTR_RO(version_nvdata_persistent);
2838
2839 /**
2840  * version_nvdata_default_show - nvdata default version
2841  * @cdev: pointer to embedded class device
2842  * @attr: ?
2843  * @buf: the buffer returned
2844  *
2845  * A sysfs 'read-only' shost attribute.
2846  */
2847 static ssize_t
2848 version_nvdata_default_show(struct device *cdev, struct device_attribute
2849         *attr, char *buf)
2850 {
2851         struct Scsi_Host *shost = class_to_shost(cdev);
2852         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2853
2854         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2855             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2856 }
2857 static DEVICE_ATTR_RO(version_nvdata_default);
2858
2859 /**
2860  * board_name_show - board name
2861  * @cdev: pointer to embedded class device
2862  * @attr: ?
2863  * @buf: the buffer returned
2864  *
2865  * A sysfs 'read-only' shost attribute.
2866  */
2867 static ssize_t
2868 board_name_show(struct device *cdev, struct device_attribute *attr,
2869         char *buf)
2870 {
2871         struct Scsi_Host *shost = class_to_shost(cdev);
2872         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2873
2874         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2875 }
2876 static DEVICE_ATTR_RO(board_name);
2877
2878 /**
2879  * board_assembly_show - board assembly 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 board_assembly_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.BoardAssembly);
2894 }
2895 static DEVICE_ATTR_RO(board_assembly);
2896
2897 /**
2898  * board_tracer_show - board tracer number
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 board_tracer_show(struct device *cdev, struct device_attribute *attr,
2907         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, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2913 }
2914 static DEVICE_ATTR_RO(board_tracer);
2915
2916 /**
2917  * io_delay_show - io missing delay
2918  * @cdev: pointer to embedded class device
2919  * @attr: ?
2920  * @buf: the buffer returned
2921  *
2922  * This is for firmware implemention for deboucing device
2923  * removal events.
2924  *
2925  * A sysfs 'read-only' shost attribute.
2926  */
2927 static ssize_t
2928 io_delay_show(struct device *cdev, struct device_attribute *attr,
2929         char *buf)
2930 {
2931         struct Scsi_Host *shost = class_to_shost(cdev);
2932         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2933
2934         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
2935 }
2936 static DEVICE_ATTR_RO(io_delay);
2937
2938 /**
2939  * device_delay_show - device missing delay
2940  * @cdev: pointer to embedded class device
2941  * @attr: ?
2942  * @buf: the buffer returned
2943  *
2944  * This is for firmware implemention for deboucing device
2945  * removal events.
2946  *
2947  * A sysfs 'read-only' shost attribute.
2948  */
2949 static ssize_t
2950 device_delay_show(struct device *cdev, struct device_attribute *attr,
2951         char *buf)
2952 {
2953         struct Scsi_Host *shost = class_to_shost(cdev);
2954         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2955
2956         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
2957 }
2958 static DEVICE_ATTR_RO(device_delay);
2959
2960 /**
2961  * fw_queue_depth_show - global credits
2962  * @cdev: pointer to embedded class device
2963  * @attr: ?
2964  * @buf: the buffer returned
2965  *
2966  * This is firmware queue depth limit
2967  *
2968  * A sysfs 'read-only' shost attribute.
2969  */
2970 static ssize_t
2971 fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
2972         char *buf)
2973 {
2974         struct Scsi_Host *shost = class_to_shost(cdev);
2975         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2976
2977         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
2978 }
2979 static DEVICE_ATTR_RO(fw_queue_depth);
2980
2981 /**
2982  * sas_address_show - sas address
2983  * @cdev: pointer to embedded class device
2984  * @attr: ?
2985  * @buf: the buffer returned
2986  *
2987  * This is the controller sas address
2988  *
2989  * A sysfs 'read-only' shost attribute.
2990  */
2991 static ssize_t
2992 host_sas_address_show(struct device *cdev, struct device_attribute *attr,
2993         char *buf)
2994
2995 {
2996         struct Scsi_Host *shost = class_to_shost(cdev);
2997         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
2998
2999         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3000             (unsigned long long)ioc->sas_hba.sas_address);
3001 }
3002 static DEVICE_ATTR_RO(host_sas_address);
3003
3004 /**
3005  * logging_level_show - logging level
3006  * @cdev: pointer to embedded class device
3007  * @attr: ?
3008  * @buf: the buffer returned
3009  *
3010  * A sysfs 'read/write' shost attribute.
3011  */
3012 static ssize_t
3013 logging_level_show(struct device *cdev, struct device_attribute *attr,
3014         char *buf)
3015 {
3016         struct Scsi_Host *shost = class_to_shost(cdev);
3017         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3018
3019         return snprintf(buf, PAGE_SIZE, "%08xh\n", ioc->logging_level);
3020 }
3021 static ssize_t
3022 logging_level_store(struct device *cdev, struct device_attribute *attr,
3023         const char *buf, size_t count)
3024 {
3025         struct Scsi_Host *shost = class_to_shost(cdev);
3026         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3027         int val = 0;
3028
3029         if (sscanf(buf, "%x", &val) != 1)
3030                 return -EINVAL;
3031
3032         ioc->logging_level = val;
3033         ioc_info(ioc, "logging_level=%08xh\n",
3034                  ioc->logging_level);
3035         return strlen(buf);
3036 }
3037 static DEVICE_ATTR_RW(logging_level);
3038
3039 /**
3040  * fwfault_debug_show - show/store fwfault_debug
3041  * @cdev: pointer to embedded class device
3042  * @attr: ?
3043  * @buf: the buffer returned
3044  *
3045  * mpt3sas_fwfault_debug is command line option
3046  * A sysfs 'read/write' shost attribute.
3047  */
3048 static ssize_t
3049 fwfault_debug_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, "%d\n", ioc->fwfault_debug);
3056 }
3057 static ssize_t
3058 fwfault_debug_store(struct device *cdev, struct device_attribute *attr,
3059         const char *buf, size_t count)
3060 {
3061         struct Scsi_Host *shost = class_to_shost(cdev);
3062         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3063         int val = 0;
3064
3065         if (sscanf(buf, "%d", &val) != 1)
3066                 return -EINVAL;
3067
3068         ioc->fwfault_debug = val;
3069         ioc_info(ioc, "fwfault_debug=%d\n",
3070                  ioc->fwfault_debug);
3071         return strlen(buf);
3072 }
3073 static DEVICE_ATTR_RW(fwfault_debug);
3074
3075 /**
3076  * ioc_reset_count_show - ioc reset count
3077  * @cdev: pointer to embedded class device
3078  * @attr: ?
3079  * @buf: the buffer returned
3080  *
3081  * This is firmware queue depth limit
3082  *
3083  * A sysfs 'read-only' shost attribute.
3084  */
3085 static ssize_t
3086 ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
3087         char *buf)
3088 {
3089         struct Scsi_Host *shost = class_to_shost(cdev);
3090         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3091
3092         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->ioc_reset_count);
3093 }
3094 static DEVICE_ATTR_RO(ioc_reset_count);
3095
3096 /**
3097  * reply_queue_count_show - number of reply queues
3098  * @cdev: pointer to embedded class device
3099  * @attr: ?
3100  * @buf: the buffer returned
3101  *
3102  * This is number of reply queues
3103  *
3104  * A sysfs 'read-only' shost attribute.
3105  */
3106 static ssize_t
3107 reply_queue_count_show(struct device *cdev,
3108         struct device_attribute *attr, char *buf)
3109 {
3110         u8 reply_queue_count;
3111         struct Scsi_Host *shost = class_to_shost(cdev);
3112         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3113
3114         if ((ioc->facts.IOCCapabilities &
3115             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
3116                 reply_queue_count = ioc->reply_queue_count;
3117         else
3118                 reply_queue_count = 1;
3119
3120         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
3121 }
3122 static DEVICE_ATTR_RO(reply_queue_count);
3123
3124 /**
3125  * BRM_status_show - Backup Rail Monitor Status
3126  * @cdev: pointer to embedded class device
3127  * @attr: ?
3128  * @buf: the buffer returned
3129  *
3130  * This is number of reply queues
3131  *
3132  * A sysfs 'read-only' shost attribute.
3133  */
3134 static ssize_t
3135 BRM_status_show(struct device *cdev, struct device_attribute *attr,
3136         char *buf)
3137 {
3138         struct Scsi_Host *shost = class_to_shost(cdev);
3139         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3140         Mpi2IOUnitPage3_t *io_unit_pg3 = NULL;
3141         Mpi2ConfigReply_t mpi_reply;
3142         u16 backup_rail_monitor_status = 0;
3143         u16 ioc_status;
3144         int sz;
3145         ssize_t rc = 0;
3146
3147         if (!ioc->is_warpdrive) {
3148                 ioc_err(ioc, "%s: BRM attribute is only for warpdrive\n",
3149                         __func__);
3150                 return 0;
3151         }
3152         /* pci_access_mutex lock acquired by sysfs show path */
3153         mutex_lock(&ioc->pci_access_mutex);
3154         if (ioc->pci_error_recovery || ioc->remove_host)
3155                 goto out;
3156
3157         /* allocate upto GPIOVal 36 entries */
3158         sz = offsetof(Mpi2IOUnitPage3_t, GPIOVal) + (sizeof(u16) * 36);
3159         io_unit_pg3 = kzalloc(sz, GFP_KERNEL);
3160         if (!io_unit_pg3) {
3161                 rc = -ENOMEM;
3162                 ioc_err(ioc, "%s: failed allocating memory for iounit_pg3: (%d) bytes\n",
3163                         __func__, sz);
3164                 goto out;
3165         }
3166
3167         if (mpt3sas_config_get_iounit_pg3(ioc, &mpi_reply, io_unit_pg3, sz) !=
3168             0) {
3169                 ioc_err(ioc, "%s: failed reading iounit_pg3\n",
3170                         __func__);
3171                 rc = -EINVAL;
3172                 goto out;
3173         }
3174
3175         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
3176         if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
3177                 ioc_err(ioc, "%s: iounit_pg3 failed with ioc_status(0x%04x)\n",
3178                         __func__, ioc_status);
3179                 rc = -EINVAL;
3180                 goto out;
3181         }
3182
3183         if (io_unit_pg3->GPIOCount < 25) {
3184                 ioc_err(ioc, "%s: iounit_pg3->GPIOCount less than 25 entries, detected (%d) entries\n",
3185                         __func__, io_unit_pg3->GPIOCount);
3186                 rc = -EINVAL;
3187                 goto out;
3188         }
3189
3190         /* BRM status is in bit zero of GPIOVal[24] */
3191         backup_rail_monitor_status = le16_to_cpu(io_unit_pg3->GPIOVal[24]);
3192         rc = snprintf(buf, PAGE_SIZE, "%d\n", (backup_rail_monitor_status & 1));
3193
3194  out:
3195         kfree(io_unit_pg3);
3196         mutex_unlock(&ioc->pci_access_mutex);
3197         return rc;
3198 }
3199 static DEVICE_ATTR_RO(BRM_status);
3200
3201 struct DIAG_BUFFER_START {
3202         __le32  Size;
3203         __le32  DiagVersion;
3204         u8      BufferType;
3205         u8      Reserved[3];
3206         __le32  Reserved1;
3207         __le32  Reserved2;
3208         __le32  Reserved3;
3209 };
3210
3211 /**
3212  * host_trace_buffer_size_show - host buffer size (trace only)
3213  * @cdev: pointer to embedded class device
3214  * @attr: ?
3215  * @buf: the buffer returned
3216  *
3217  * A sysfs 'read-only' shost attribute.
3218  */
3219 static ssize_t
3220 host_trace_buffer_size_show(struct device *cdev,
3221         struct device_attribute *attr, char *buf)
3222 {
3223         struct Scsi_Host *shost = class_to_shost(cdev);
3224         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3225         u32 size = 0;
3226         struct DIAG_BUFFER_START *request_data;
3227
3228         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3229                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3230                         __func__);
3231                 return 0;
3232         }
3233
3234         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3235             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3236                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3237                         __func__);
3238                 return 0;
3239         }
3240
3241         request_data = (struct DIAG_BUFFER_START *)
3242             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
3243         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
3244             le32_to_cpu(request_data->DiagVersion) == 0x01000000 ||
3245             le32_to_cpu(request_data->DiagVersion) == 0x01010000) &&
3246             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
3247                 size = le32_to_cpu(request_data->Size);
3248
3249         ioc->ring_buffer_sz = size;
3250         return snprintf(buf, PAGE_SIZE, "%d\n", size);
3251 }
3252 static DEVICE_ATTR_RO(host_trace_buffer_size);
3253
3254 /**
3255  * host_trace_buffer_show - firmware ring buffer (trace only)
3256  * @cdev: pointer to embedded class device
3257  * @attr: ?
3258  * @buf: the buffer returned
3259  *
3260  * A sysfs 'read/write' shost attribute.
3261  *
3262  * You will only be able to read 4k bytes of ring buffer at a time.
3263  * In order to read beyond 4k bytes, you will have to write out the
3264  * offset to the same attribute, it will move the pointer.
3265  */
3266 static ssize_t
3267 host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
3268         char *buf)
3269 {
3270         struct Scsi_Host *shost = class_to_shost(cdev);
3271         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3272         void *request_data;
3273         u32 size;
3274
3275         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
3276                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3277                         __func__);
3278                 return 0;
3279         }
3280
3281         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3282             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0) {
3283                 ioc_err(ioc, "%s: host_trace_buffer is not registered\n",
3284                         __func__);
3285                 return 0;
3286         }
3287
3288         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
3289                 return 0;
3290
3291         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
3292         size = (size >= PAGE_SIZE) ? (PAGE_SIZE - 1) : size;
3293         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
3294         memcpy(buf, request_data, size);
3295         return size;
3296 }
3297
3298 static ssize_t
3299 host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
3300         const char *buf, size_t count)
3301 {
3302         struct Scsi_Host *shost = class_to_shost(cdev);
3303         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3304         int val = 0;
3305
3306         if (sscanf(buf, "%d", &val) != 1)
3307                 return -EINVAL;
3308
3309         ioc->ring_buffer_offset = val;
3310         return strlen(buf);
3311 }
3312 static DEVICE_ATTR_RW(host_trace_buffer);
3313
3314
3315 /*****************************************/
3316
3317 /**
3318  * host_trace_buffer_enable_show - firmware ring buffer (trace only)
3319  * @cdev: pointer to embedded class device
3320  * @attr: ?
3321  * @buf: the buffer returned
3322  *
3323  * A sysfs 'read/write' shost attribute.
3324  *
3325  * This is a mechnism to post/release host_trace_buffers
3326  */
3327 static ssize_t
3328 host_trace_buffer_enable_show(struct device *cdev,
3329         struct device_attribute *attr, char *buf)
3330 {
3331         struct Scsi_Host *shost = class_to_shost(cdev);
3332         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3333
3334         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
3335            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3336             MPT3_DIAG_BUFFER_IS_REGISTERED) == 0))
3337                 return snprintf(buf, PAGE_SIZE, "off\n");
3338         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3339             MPT3_DIAG_BUFFER_IS_RELEASED))
3340                 return snprintf(buf, PAGE_SIZE, "release\n");
3341         else
3342                 return snprintf(buf, PAGE_SIZE, "post\n");
3343 }
3344
3345 static ssize_t
3346 host_trace_buffer_enable_store(struct device *cdev,
3347         struct device_attribute *attr, const char *buf, size_t count)
3348 {
3349         struct Scsi_Host *shost = class_to_shost(cdev);
3350         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3351         char str[10] = "";
3352         struct mpt3_diag_register diag_register;
3353         u8 issue_reset = 0;
3354
3355         /* don't allow post/release occurr while recovery is active */
3356         if (ioc->shost_recovery || ioc->remove_host ||
3357             ioc->pci_error_recovery || ioc->is_driver_loading)
3358                 return -EBUSY;
3359
3360         if (sscanf(buf, "%9s", str) != 1)
3361                 return -EINVAL;
3362
3363         if (!strcmp(str, "post")) {
3364                 /* exit out if host buffers are already posted */
3365                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
3366                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3367                     MPT3_DIAG_BUFFER_IS_REGISTERED) &&
3368                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3369                     MPT3_DIAG_BUFFER_IS_RELEASED) == 0))
3370                         goto out;
3371                 memset(&diag_register, 0, sizeof(struct mpt3_diag_register));
3372                 ioc_info(ioc, "posting host trace buffers\n");
3373                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
3374
3375                 if (ioc->manu_pg11.HostTraceBufferMaxSizeKB != 0 &&
3376                     ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0) {
3377                         /* post the same buffer allocated previously */
3378                         diag_register.requested_buffer_size =
3379                             ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE];
3380                 } else {
3381                         /*
3382                          * Free the diag buffer memory which was previously
3383                          * allocated by an application.
3384                          */
3385                         if ((ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE] != 0)
3386                             &&
3387                             (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3388                             MPT3_DIAG_BUFFER_IS_APP_OWNED)) {
3389                                 dma_free_coherent(&ioc->pdev->dev,
3390                                                   ioc->diag_buffer_sz[MPI2_DIAG_BUF_TYPE_TRACE],
3391                                                   ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE],
3392                                                   ioc->diag_buffer_dma[MPI2_DIAG_BUF_TYPE_TRACE]);
3393                                 ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE] =
3394                                     NULL;
3395                         }
3396
3397                         diag_register.requested_buffer_size = (1024 * 1024);
3398                 }
3399
3400                 diag_register.unique_id =
3401                     (ioc->hba_mpi_version_belonged == MPI2_VERSION) ?
3402                     (MPT2DIAGBUFFUNIQUEID):(MPT3DIAGBUFFUNIQUEID);
3403                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
3404                 _ctl_diag_register_2(ioc,  &diag_register);
3405                 if (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3406                     MPT3_DIAG_BUFFER_IS_REGISTERED) {
3407                         ioc_info(ioc,
3408                             "Trace buffer %d KB allocated through sysfs\n",
3409                             diag_register.requested_buffer_size>>10);
3410                         if (ioc->hba_mpi_version_belonged != MPI2_VERSION)
3411                                 ioc->diag_buffer_status[
3412                                     MPI2_DIAG_BUF_TYPE_TRACE] |=
3413                                     MPT3_DIAG_BUFFER_IS_DRIVER_ALLOCATED;
3414                 }
3415         } else if (!strcmp(str, "release")) {
3416                 /* exit out if host buffers are already released */
3417                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
3418                         goto out;
3419                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3420                     MPT3_DIAG_BUFFER_IS_REGISTERED) == 0)
3421                         goto out;
3422                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
3423                     MPT3_DIAG_BUFFER_IS_RELEASED))
3424                         goto out;
3425                 ioc_info(ioc, "releasing host trace buffer\n");
3426                 mpt3sas_send_diag_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE,
3427                     &issue_reset);
3428         }
3429
3430  out:
3431         return strlen(buf);
3432 }
3433 static DEVICE_ATTR_RW(host_trace_buffer_enable);
3434
3435 /*********** diagnostic trigger suppport *********************************/
3436
3437 /**
3438  * diag_trigger_master_show - show the diag_trigger_master attribute
3439  * @cdev: pointer to embedded class device
3440  * @attr: ?
3441  * @buf: the buffer returned
3442  *
3443  * A sysfs 'read/write' shost attribute.
3444  */
3445 static ssize_t
3446 diag_trigger_master_show(struct device *cdev,
3447         struct device_attribute *attr, char *buf)
3448
3449 {
3450         struct Scsi_Host *shost = class_to_shost(cdev);
3451         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3452         unsigned long flags;
3453         ssize_t rc;
3454
3455         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3456         rc = sizeof(struct SL_WH_MASTER_TRIGGER_T);
3457         memcpy(buf, &ioc->diag_trigger_master, rc);
3458         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3459         return rc;
3460 }
3461
3462 /**
3463  * diag_trigger_master_store - store the diag_trigger_master attribute
3464  * @cdev: pointer to embedded class device
3465  * @attr: ?
3466  * @buf: the buffer returned
3467  * @count: ?
3468  *
3469  * A sysfs 'read/write' shost attribute.
3470  */
3471 static ssize_t
3472 diag_trigger_master_store(struct device *cdev,
3473         struct device_attribute *attr, const char *buf, size_t count)
3474
3475 {
3476         struct Scsi_Host *shost = class_to_shost(cdev);
3477         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3478         unsigned long flags;
3479         ssize_t rc;
3480
3481         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3482         rc = min(sizeof(struct SL_WH_MASTER_TRIGGER_T), count);
3483         memset(&ioc->diag_trigger_master, 0,
3484             sizeof(struct SL_WH_MASTER_TRIGGER_T));
3485         memcpy(&ioc->diag_trigger_master, buf, rc);
3486         ioc->diag_trigger_master.MasterData |=
3487             (MASTER_TRIGGER_FW_FAULT + MASTER_TRIGGER_ADAPTER_RESET);
3488         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3489         return rc;
3490 }
3491 static DEVICE_ATTR_RW(diag_trigger_master);
3492
3493
3494 /**
3495  * diag_trigger_event_show - show the diag_trigger_event attribute
3496  * @cdev: pointer to embedded class device
3497  * @attr: ?
3498  * @buf: the buffer returned
3499  *
3500  * A sysfs 'read/write' shost attribute.
3501  */
3502 static ssize_t
3503 diag_trigger_event_show(struct device *cdev,
3504         struct device_attribute *attr, char *buf)
3505 {
3506         struct Scsi_Host *shost = class_to_shost(cdev);
3507         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3508         unsigned long flags;
3509         ssize_t rc;
3510
3511         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3512         rc = sizeof(struct SL_WH_EVENT_TRIGGERS_T);
3513         memcpy(buf, &ioc->diag_trigger_event, rc);
3514         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3515         return rc;
3516 }
3517
3518 /**
3519  * diag_trigger_event_store - store the diag_trigger_event attribute
3520  * @cdev: pointer to embedded class device
3521  * @attr: ?
3522  * @buf: the buffer returned
3523  * @count: ?
3524  *
3525  * A sysfs 'read/write' shost attribute.
3526  */
3527 static ssize_t
3528 diag_trigger_event_store(struct device *cdev,
3529         struct device_attribute *attr, const char *buf, size_t count)
3530
3531 {
3532         struct Scsi_Host *shost = class_to_shost(cdev);
3533         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3534         unsigned long flags;
3535         ssize_t sz;
3536
3537         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3538         sz = min(sizeof(struct SL_WH_EVENT_TRIGGERS_T), count);
3539         memset(&ioc->diag_trigger_event, 0,
3540             sizeof(struct SL_WH_EVENT_TRIGGERS_T));
3541         memcpy(&ioc->diag_trigger_event, buf, sz);
3542         if (ioc->diag_trigger_event.ValidEntries > NUM_VALID_ENTRIES)
3543                 ioc->diag_trigger_event.ValidEntries = NUM_VALID_ENTRIES;
3544         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3545         return sz;
3546 }
3547 static DEVICE_ATTR_RW(diag_trigger_event);
3548
3549
3550 /**
3551  * diag_trigger_scsi_show - show the diag_trigger_scsi attribute
3552  * @cdev: pointer to embedded class device
3553  * @attr: ?
3554  * @buf: the buffer returned
3555  *
3556  * A sysfs 'read/write' shost attribute.
3557  */
3558 static ssize_t
3559 diag_trigger_scsi_show(struct device *cdev,
3560         struct device_attribute *attr, char *buf)
3561 {
3562         struct Scsi_Host *shost = class_to_shost(cdev);
3563         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3564         unsigned long flags;
3565         ssize_t rc;
3566
3567         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3568         rc = sizeof(struct SL_WH_SCSI_TRIGGERS_T);
3569         memcpy(buf, &ioc->diag_trigger_scsi, rc);
3570         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3571         return rc;
3572 }
3573
3574 /**
3575  * diag_trigger_scsi_store - store the diag_trigger_scsi attribute
3576  * @cdev: pointer to embedded class device
3577  * @attr: ?
3578  * @buf: the buffer returned
3579  * @count: ?
3580  *
3581  * A sysfs 'read/write' shost attribute.
3582  */
3583 static ssize_t
3584 diag_trigger_scsi_store(struct device *cdev,
3585         struct device_attribute *attr, const char *buf, size_t count)
3586 {
3587         struct Scsi_Host *shost = class_to_shost(cdev);
3588         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3589         unsigned long flags;
3590         ssize_t sz;
3591
3592         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3593         sz = min(sizeof(ioc->diag_trigger_scsi), count);
3594         memset(&ioc->diag_trigger_scsi, 0, sizeof(ioc->diag_trigger_scsi));
3595         memcpy(&ioc->diag_trigger_scsi, buf, sz);
3596         if (ioc->diag_trigger_scsi.ValidEntries > NUM_VALID_ENTRIES)
3597                 ioc->diag_trigger_scsi.ValidEntries = NUM_VALID_ENTRIES;
3598         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3599         return sz;
3600 }
3601 static DEVICE_ATTR_RW(diag_trigger_scsi);
3602
3603
3604 /**
3605  * diag_trigger_scsi_show - show the diag_trigger_mpi attribute
3606  * @cdev: pointer to embedded class device
3607  * @attr: ?
3608  * @buf: the buffer returned
3609  *
3610  * A sysfs 'read/write' shost attribute.
3611  */
3612 static ssize_t
3613 diag_trigger_mpi_show(struct device *cdev,
3614         struct device_attribute *attr, char *buf)
3615 {
3616         struct Scsi_Host *shost = class_to_shost(cdev);
3617         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3618         unsigned long flags;
3619         ssize_t rc;
3620
3621         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3622         rc = sizeof(struct SL_WH_MPI_TRIGGERS_T);
3623         memcpy(buf, &ioc->diag_trigger_mpi, rc);
3624         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3625         return rc;
3626 }
3627
3628 /**
3629  * diag_trigger_mpi_store - store the diag_trigger_mpi attribute
3630  * @cdev: pointer to embedded class device
3631  * @attr: ?
3632  * @buf: the buffer returned
3633  * @count: ?
3634  *
3635  * A sysfs 'read/write' shost attribute.
3636  */
3637 static ssize_t
3638 diag_trigger_mpi_store(struct device *cdev,
3639         struct device_attribute *attr, const char *buf, size_t count)
3640 {
3641         struct Scsi_Host *shost = class_to_shost(cdev);
3642         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3643         unsigned long flags;
3644         ssize_t sz;
3645
3646         spin_lock_irqsave(&ioc->diag_trigger_lock, flags);
3647         sz = min(sizeof(struct SL_WH_MPI_TRIGGERS_T), count);
3648         memset(&ioc->diag_trigger_mpi, 0,
3649             sizeof(ioc->diag_trigger_mpi));
3650         memcpy(&ioc->diag_trigger_mpi, buf, sz);
3651         if (ioc->diag_trigger_mpi.ValidEntries > NUM_VALID_ENTRIES)
3652                 ioc->diag_trigger_mpi.ValidEntries = NUM_VALID_ENTRIES;
3653         spin_unlock_irqrestore(&ioc->diag_trigger_lock, flags);
3654         return sz;
3655 }
3656
3657 static DEVICE_ATTR_RW(diag_trigger_mpi);
3658
3659 /*********** diagnostic trigger suppport *** END ****************************/
3660
3661 /*****************************************/
3662
3663 /**
3664  * drv_support_bitmap_show - driver supported feature bitmap
3665  * @cdev: pointer to embedded class device
3666  * @attr: unused
3667  * @buf: the buffer returned
3668  *
3669  * A sysfs 'read-only' shost attribute.
3670  */
3671 static ssize_t
3672 drv_support_bitmap_show(struct device *cdev,
3673         struct device_attribute *attr, char *buf)
3674 {
3675         struct Scsi_Host *shost = class_to_shost(cdev);
3676         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3677
3678         return snprintf(buf, PAGE_SIZE, "0x%08x\n", ioc->drv_support_bitmap);
3679 }
3680 static DEVICE_ATTR_RO(drv_support_bitmap);
3681
3682 /**
3683  * enable_sdev_max_qd_show - display whether sdev max qd is enabled/disabled
3684  * @cdev: pointer to embedded class device
3685  * @attr: unused
3686  * @buf: the buffer returned
3687  *
3688  * A sysfs read/write shost attribute. This attribute is used to set the
3689  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3690  */
3691 static ssize_t
3692 enable_sdev_max_qd_show(struct device *cdev,
3693         struct device_attribute *attr, char *buf)
3694 {
3695         struct Scsi_Host *shost = class_to_shost(cdev);
3696         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3697
3698         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->enable_sdev_max_qd);
3699 }
3700
3701 /**
3702  * enable_sdev_max_qd_store - Enable/disable sdev max qd
3703  * @cdev: pointer to embedded class device
3704  * @attr: unused
3705  * @buf: the buffer returned
3706  * @count: unused
3707  *
3708  * A sysfs read/write shost attribute. This attribute is used to set the
3709  * targets queue depth to HBA IO queue depth if this attribute is enabled.
3710  * If this attribute is disabled then targets will have corresponding default
3711  * queue depth.
3712  */
3713 static ssize_t
3714 enable_sdev_max_qd_store(struct device *cdev,
3715         struct device_attribute *attr, const char *buf, size_t count)
3716 {
3717         struct Scsi_Host *shost = class_to_shost(cdev);
3718         struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
3719         struct MPT3SAS_DEVICE *sas_device_priv_data;
3720         struct MPT3SAS_TARGET *sas_target_priv_data;
3721         int val = 0;
3722         struct scsi_device *sdev;
3723         struct _raid_device *raid_device;
3724         int qdepth;
3725
3726         if (kstrtoint(buf, 0, &val) != 0)
3727                 return -EINVAL;
3728
3729         switch (val) {
3730         case 0:
3731                 ioc->enable_sdev_max_qd = 0;
3732                 shost_for_each_device(sdev, ioc->shost) {
3733                         sas_device_priv_data = sdev->hostdata;
3734                         if (!sas_device_priv_data)
3735                                 continue;
3736                         sas_target_priv_data = sas_device_priv_data->sas_target;
3737                         if (!sas_target_priv_data)
3738                                 continue;
3739
3740                         if (sas_target_priv_data->flags &
3741                             MPT_TARGET_FLAGS_VOLUME) {
3742                                 raid_device =
3743                                     mpt3sas_raid_device_find_by_handle(ioc,
3744                                     sas_target_priv_data->handle);
3745
3746                                 switch (raid_device->volume_type) {
3747                                 case MPI2_RAID_VOL_TYPE_RAID0:
3748                                         if (raid_device->device_info &
3749                                             MPI2_SAS_DEVICE_INFO_SSP_TARGET)
3750                                                 qdepth =
3751                                                     MPT3SAS_SAS_QUEUE_DEPTH;
3752                                         else
3753                                                 qdepth =
3754                                                     MPT3SAS_SATA_QUEUE_DEPTH;
3755                                         break;
3756                                 case MPI2_RAID_VOL_TYPE_RAID1E:
3757                                 case MPI2_RAID_VOL_TYPE_RAID1:
3758                                 case MPI2_RAID_VOL_TYPE_RAID10:
3759                                 case MPI2_RAID_VOL_TYPE_UNKNOWN:
3760                                 default:
3761                                         qdepth = MPT3SAS_RAID_QUEUE_DEPTH;
3762                                 }
3763                         } else if (sas_target_priv_data->flags &
3764                             MPT_TARGET_FLAGS_PCIE_DEVICE)
3765                                 qdepth = MPT3SAS_NVME_QUEUE_DEPTH;
3766                         else
3767                                 qdepth = MPT3SAS_SAS_QUEUE_DEPTH;
3768
3769                         mpt3sas_scsih_change_queue_depth(sdev, qdepth);
3770                 }
3771                 break;
3772         case 1:
3773                 ioc->enable_sdev_max_qd = 1;
3774                 shost_for_each_device(sdev, ioc->shost)
3775                         mpt3sas_scsih_change_queue_depth(sdev,
3776                             shost->can_queue);
3777                 break;
3778         default:
3779                 return -EINVAL;
3780         }
3781
3782         return strlen(buf);
3783 }
3784 static DEVICE_ATTR_RW(enable_sdev_max_qd);
3785
3786 struct device_attribute *mpt3sas_host_attrs[] = {
3787         &dev_attr_version_fw,
3788         &dev_attr_version_bios,
3789         &dev_attr_version_mpi,
3790         &dev_attr_version_product,
3791         &dev_attr_version_nvdata_persistent,
3792         &dev_attr_version_nvdata_default,
3793         &dev_attr_board_name,
3794         &dev_attr_board_assembly,
3795         &dev_attr_board_tracer,
3796         &dev_attr_io_delay,
3797         &dev_attr_device_delay,
3798         &dev_attr_logging_level,
3799         &dev_attr_fwfault_debug,
3800         &dev_attr_fw_queue_depth,
3801         &dev_attr_host_sas_address,
3802         &dev_attr_ioc_reset_count,
3803         &dev_attr_host_trace_buffer_size,
3804         &dev_attr_host_trace_buffer,
3805         &dev_attr_host_trace_buffer_enable,
3806         &dev_attr_reply_queue_count,
3807         &dev_attr_diag_trigger_master,
3808         &dev_attr_diag_trigger_event,
3809         &dev_attr_diag_trigger_scsi,
3810         &dev_attr_diag_trigger_mpi,
3811         &dev_attr_drv_support_bitmap,
3812         &dev_attr_BRM_status,
3813         &dev_attr_enable_sdev_max_qd,
3814         NULL,
3815 };
3816
3817 /* device attributes */
3818
3819 /**
3820  * sas_address_show - sas address
3821  * @dev: pointer to embedded class device
3822  * @attr: ?
3823  * @buf: the buffer returned
3824  *
3825  * This is the sas address for the target
3826  *
3827  * A sysfs 'read-only' shost attribute.
3828  */
3829 static ssize_t
3830 sas_address_show(struct device *dev, struct device_attribute *attr,
3831         char *buf)
3832 {
3833         struct scsi_device *sdev = to_scsi_device(dev);
3834         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3835
3836         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
3837             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
3838 }
3839 static DEVICE_ATTR_RO(sas_address);
3840
3841 /**
3842  * sas_device_handle_show - device handle
3843  * @dev: pointer to embedded class device
3844  * @attr: ?
3845  * @buf: the buffer returned
3846  *
3847  * This is the firmware assigned device handle
3848  *
3849  * A sysfs 'read-only' shost attribute.
3850  */
3851 static ssize_t
3852 sas_device_handle_show(struct device *dev, struct device_attribute *attr,
3853         char *buf)
3854 {
3855         struct scsi_device *sdev = to_scsi_device(dev);
3856         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3857
3858         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
3859             sas_device_priv_data->sas_target->handle);
3860 }
3861 static DEVICE_ATTR_RO(sas_device_handle);
3862
3863 /**
3864  * sas_ncq_io_prio_show - send prioritized io commands to device
3865  * @dev: pointer to embedded device
3866  * @attr: ?
3867  * @buf: the buffer returned
3868  *
3869  * A sysfs 'read/write' sdev attribute, only works with SATA
3870  */
3871 static ssize_t
3872 sas_ncq_prio_enable_show(struct device *dev,
3873                                  struct device_attribute *attr, char *buf)
3874 {
3875         struct scsi_device *sdev = to_scsi_device(dev);
3876         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3877
3878         return snprintf(buf, PAGE_SIZE, "%d\n",
3879                         sas_device_priv_data->ncq_prio_enable);
3880 }
3881
3882 static ssize_t
3883 sas_ncq_prio_enable_store(struct device *dev,
3884                                   struct device_attribute *attr,
3885                                   const char *buf, size_t count)
3886 {
3887         struct scsi_device *sdev = to_scsi_device(dev);
3888         struct MPT3SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
3889         bool ncq_prio_enable = 0;
3890
3891         if (kstrtobool(buf, &ncq_prio_enable))
3892                 return -EINVAL;
3893
3894         if (!scsih_ncq_prio_supp(sdev))
3895                 return -EINVAL;
3896
3897         sas_device_priv_data->ncq_prio_enable = ncq_prio_enable;
3898         return strlen(buf);
3899 }
3900 static DEVICE_ATTR_RW(sas_ncq_prio_enable);
3901
3902 struct device_attribute *mpt3sas_dev_attrs[] = {
3903         &dev_attr_sas_address,
3904         &dev_attr_sas_device_handle,
3905         &dev_attr_sas_ncq_prio_enable,
3906         NULL,
3907 };
3908
3909 /* file operations table for mpt3ctl device */
3910 static const struct file_operations ctl_fops = {
3911         .owner = THIS_MODULE,
3912         .unlocked_ioctl = _ctl_ioctl,
3913         .poll = _ctl_poll,
3914         .fasync = _ctl_fasync,
3915 #ifdef CONFIG_COMPAT
3916         .compat_ioctl = _ctl_ioctl_compat,
3917 #endif
3918 };
3919
3920 /* file operations table for mpt2ctl device */
3921 static const struct file_operations ctl_gen2_fops = {
3922         .owner = THIS_MODULE,
3923         .unlocked_ioctl = _ctl_mpt2_ioctl,
3924         .poll = _ctl_poll,
3925         .fasync = _ctl_fasync,
3926 #ifdef CONFIG_COMPAT
3927         .compat_ioctl = _ctl_mpt2_ioctl_compat,
3928 #endif
3929 };
3930
3931 static struct miscdevice ctl_dev = {
3932         .minor  = MPT3SAS_MINOR,
3933         .name   = MPT3SAS_DEV_NAME,
3934         .fops   = &ctl_fops,
3935 };
3936
3937 static struct miscdevice gen2_ctl_dev = {
3938         .minor  = MPT2SAS_MINOR,
3939         .name   = MPT2SAS_DEV_NAME,
3940         .fops   = &ctl_gen2_fops,
3941 };
3942
3943 /**
3944  * mpt3sas_ctl_init - main entry point for ctl.
3945  * @hbas_to_enumerate: ?
3946  */
3947 void
3948 mpt3sas_ctl_init(ushort hbas_to_enumerate)
3949 {
3950         async_queue = NULL;
3951
3952         /* Don't register mpt3ctl ioctl device if
3953          * hbas_to_enumarate is one.
3954          */
3955         if (hbas_to_enumerate != 1)
3956                 if (misc_register(&ctl_dev) < 0)
3957                         pr_err("%s can't register misc device [minor=%d]\n",
3958                             MPT3SAS_DRIVER_NAME, MPT3SAS_MINOR);
3959
3960         /* Don't register mpt3ctl ioctl device if
3961          * hbas_to_enumarate is two.
3962          */
3963         if (hbas_to_enumerate != 2)
3964                 if (misc_register(&gen2_ctl_dev) < 0)
3965                         pr_err("%s can't register misc device [minor=%d]\n",
3966                             MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
3967
3968         init_waitqueue_head(&ctl_poll_wait);
3969 }
3970
3971 /**
3972  * mpt3sas_ctl_exit - exit point for ctl
3973  * @hbas_to_enumerate: ?
3974  */
3975 void
3976 mpt3sas_ctl_exit(ushort hbas_to_enumerate)
3977 {
3978         struct MPT3SAS_ADAPTER *ioc;
3979         int i;
3980
3981         list_for_each_entry(ioc, &mpt3sas_ioc_list, list) {
3982
3983                 /* free memory associated to diag buffers */
3984                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
3985                         if (!ioc->diag_buffer[i])
3986                                 continue;
3987                         dma_free_coherent(&ioc->pdev->dev,
3988                                           ioc->diag_buffer_sz[i],
3989                                           ioc->diag_buffer[i],
3990                                           ioc->diag_buffer_dma[i]);
3991                         ioc->diag_buffer[i] = NULL;
3992                         ioc->diag_buffer_status[i] = 0;
3993                 }
3994
3995                 kfree(ioc->event_log);
3996         }
3997         if (hbas_to_enumerate != 1)
3998                 misc_deregister(&ctl_dev);
3999         if (hbas_to_enumerate != 2)
4000                 misc_deregister(&gen2_ctl_dev);
4001 }