drivers/scsi/mpt2sas/mpt2sas_ctl.c

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