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