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  */
 624 static long
 625 _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, struct mpt2_ioctl_command karg,
 626         void __user *mf)
 627 {
 628         MPI2RequestHeader_t *mpi_request = NULL, *request;
 629         MPI2DefaultReply_t *mpi_reply;
 630         u32 ioc_state;
 631         u16 ioc_status;
 632         u16 smid;
 633         unsigned long timeout, timeleft;
 634         u8 issue_reset;
 635         u32 sz;
 636         void *psge;
 637         void *data_out = NULL;
 638         dma_addr_t data_out_dma;
 639         size_t data_out_sz = 0;
 640         void *data_in = NULL;
 641         dma_addr_t data_in_dma;
 642         size_t data_in_sz = 0;
 643         u32 sgl_flags;
 644         long ret;
 645         u16 wait_state_count;
 646
 647         issue_reset = 0;
 648
 649         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
 650                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
 651                     ioc->name, __func__);
 652                 ret = -EAGAIN;
 653                 goto out;
 654         }
 655
 656         wait_state_count = 0;
 657         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 658         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
 659                 if (wait_state_count++ == 10) {
 660                         printk(MPT2SAS_ERR_FMT
 661                             "%s: failed due to ioc not operational\n",
 662                             ioc->name, __func__);
 663                         ret = -EFAULT;
 664                         goto out;
 665                 }
 666                 ssleep(1);
 667                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
 668                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
 669                     "operational state(count=%d)\n", ioc->name,
 670                     __func__, wait_state_count);
 671         }
 672         if (wait_state_count)
 673                 printk(MPT2SAS_INFO_FMT "%s: ioc is operational\n",
 674                     ioc->name, __func__);
 675
 676         mpi_request = kzalloc(ioc->request_sz, GFP_KERNEL);
 677         if (!mpi_request) {
 678                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a memory for "
 679                     "mpi_request\n", ioc->name, __func__);
 680                 ret = -ENOMEM;
 681                 goto out;
 682         }
 683
 684         /* Check for overflow and wraparound */
 685         if (karg.data_sge_offset * 4 > ioc->request_sz ||
 686             karg.data_sge_offset > (UINT_MAX / 4)) {
 687                 ret = -EINVAL;
 688                 goto out;
 689         }
 690
 691         /* copy in request message frame from user */
 692         if (copy_from_user(mpi_request, mf, karg.data_sge_offset*4)) {
 693                 printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__, __LINE__,
 694                     __func__);
 695                 ret = -EFAULT;
 696                 goto out;
 697         }
 698
 699         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 700                 smid = mpt2sas_base_get_smid_hpr(ioc, ioc->ctl_cb_idx);
 701                 if (!smid) {
 702                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 703                             ioc->name, __func__);
 704                         ret = -EAGAIN;
 705                         goto out;
 706                 }
 707         } else {
 708
 709                 smid = mpt2sas_base_get_smid_scsiio(ioc, ioc->ctl_cb_idx, NULL);
 710                 if (!smid) {
 711                         printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 712                             ioc->name, __func__);
 713                         ret = -EAGAIN;
 714                         goto out;
 715                 }
 716         }
 717
 718         ret = 0;
 719         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
 720         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 721         request = mpt2sas_base_get_msg_frame(ioc, smid);
 722         memcpy(request, mpi_request, karg.data_sge_offset*4);
 723         ioc->ctl_cmds.smid = smid;
 724         data_out_sz = karg.data_out_size;
 725         data_in_sz = karg.data_in_size;
 726
 727         if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 728             mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) {
 729                 if (!le16_to_cpu(mpi_request->FunctionDependent1) ||
 730                     le16_to_cpu(mpi_request->FunctionDependent1) >
 731                     ioc->facts.MaxDevHandle) {
 732                         ret = -EINVAL;
 733                         mpt2sas_base_free_smid(ioc, smid);
 734                         goto out;
 735                 }
 736         }
 737
 738         /* obtain dma-able memory for data transfer */
 739         if (data_out_sz) /* WRITE */ {
 740                 data_out = pci_alloc_consistent(ioc->pdev, data_out_sz,
 741                     &data_out_dma);
 742                 if (!data_out) {
 743                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 744                             __LINE__, __func__);
 745                         ret = -ENOMEM;
 746                         mpt2sas_base_free_smid(ioc, smid);
 747                         goto out;
 748                 }
 749                 if (copy_from_user(data_out, karg.data_out_buf_ptr,
 750                         data_out_sz)) {
 751                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 752                             __LINE__, __func__);
 753                         ret =  -EFAULT;
 754                         mpt2sas_base_free_smid(ioc, smid);
 755                         goto out;
 756                 }
 757         }
 758
 759         if (data_in_sz) /* READ */ {
 760                 data_in = pci_alloc_consistent(ioc->pdev, data_in_sz,
 761                     &data_in_dma);
 762                 if (!data_in) {
 763                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 764                             __LINE__, __func__);
 765                         ret = -ENOMEM;
 766                         mpt2sas_base_free_smid(ioc, smid);
 767                         goto out;
 768                 }
 769         }
 770
 771         /* add scatter gather elements */
 772         psge = (void *)request + (karg.data_sge_offset*4);
 773
 774         if (!data_out_sz && !data_in_sz) {
 775                 mpt2sas_base_build_zero_len_sge(ioc, psge);
 776         } else if (data_out_sz && data_in_sz) {
 777                 /* WRITE sgel first */
 778                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 779                     MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
 780                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 781                 ioc->base_add_sg_single(psge, sgl_flags |
 782                     data_out_sz, data_out_dma);
 783
 784                 /* incr sgel */
 785                 psge += ioc->sge_size;
 786
 787                 /* READ sgel last */
 788                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 789                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 790                     MPI2_SGE_FLAGS_END_OF_LIST);
 791                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 792                 ioc->base_add_sg_single(psge, sgl_flags |
 793                     data_in_sz, data_in_dma);
 794         } else if (data_out_sz) /* WRITE */ {
 795                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 796                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 797                     MPI2_SGE_FLAGS_END_OF_LIST | MPI2_SGE_FLAGS_HOST_TO_IOC);
 798                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 799                 ioc->base_add_sg_single(psge, sgl_flags |
 800                     data_out_sz, data_out_dma);
 801         } else if (data_in_sz) /* READ */ {
 802                 sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
 803                     MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
 804                     MPI2_SGE_FLAGS_END_OF_LIST);
 805                 sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
 806                 ioc->base_add_sg_single(psge, sgl_flags |
 807                     data_in_sz, data_in_dma);
 808         }
 809
 810         /* send command to firmware */
 811 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 812         _ctl_display_some_debug(ioc, smid, "ctl_request", NULL);
 813 #endif
 814
 815         init_completion(&ioc->ctl_cmds.done);
 816         switch (mpi_request->Function) {
 817         case MPI2_FUNCTION_SCSI_IO_REQUEST:
 818         case MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH:
 819         {
 820                 Mpi2SCSIIORequest_t *scsiio_request =
 821                     (Mpi2SCSIIORequest_t *)request;
 822                 scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
 823                 scsiio_request->SenseBufferLowAddress =
 824                     mpt2sas_base_get_sense_buffer_dma(ioc, smid);
 825                 memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE);
 826                 if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST)
 827                         mpt2sas_base_put_smid_scsi_io(ioc, smid,
 828                             le16_to_cpu(mpi_request->FunctionDependent1));
 829                 else
 830                         mpt2sas_base_put_smid_default(ioc, smid);
 831                 break;
 832         }
 833         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 834         {
 835                 Mpi2SCSITaskManagementRequest_t *tm_request =
 836                     (Mpi2SCSITaskManagementRequest_t *)request;
 837
 838                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 839                     "handle(0x%04x), task_type(0x%02x)\n", ioc->name,
 840                     le16_to_cpu(tm_request->DevHandle), tm_request->TaskType));
 841
 842                 if (tm_request->TaskType ==
 843                     MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK ||
 844                     tm_request->TaskType ==
 845                     MPI2_SCSITASKMGMT_TASKTYPE_QUERY_TASK) {
 846                         if (_ctl_set_task_mid(ioc, &karg, tm_request)) {
 847                                 mpt2sas_base_free_smid(ioc, smid);
 848                                 goto out;
 849                         }
 850                 }
 851
 852                 mpt2sas_scsih_set_tm_flag(ioc, le16_to_cpu(
 853                     tm_request->DevHandle));
 854                 mpt2sas_base_put_smid_hi_priority(ioc, smid);
 855                 break;
 856         }
 857         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 858         {
 859                 Mpi2SmpPassthroughRequest_t *smp_request =
 860                     (Mpi2SmpPassthroughRequest_t *)mpi_request;
 861                 u8 *data;
 862
 863                 /* ioc determines which port to use */
 864                 smp_request->PhysicalPort = 0xFF;
 865                 if (smp_request->PassthroughFlags &
 866                     MPI2_SMP_PT_REQ_PT_FLAGS_IMMEDIATE)
 867                         data = (u8 *)&smp_request->SGL;
 868                 else {
 869                         if (unlikely(data_out == NULL)) {
 870                                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
 871                                     __FILE__, __LINE__, __func__);
 872                                 mpt2sas_base_free_smid(ioc, smid);
 873                                 ret = -EINVAL;
 874                                 goto out;
 875                         }
 876                         data = data_out;
 877                 }
 878
 879                 if (data[1] == 0x91 && (data[10] == 1 || data[10] == 2)) {
 880                         ioc->ioc_link_reset_in_progress = 1;
 881                         ioc->ignore_loginfos = 1;
 882                 }
 883                 mpt2sas_base_put_smid_default(ioc, smid);
 884                 break;
 885         }
 886         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 887         {
 888                 Mpi2SasIoUnitControlRequest_t *sasiounit_request =
 889                     (Mpi2SasIoUnitControlRequest_t *)mpi_request;
 890
 891                 if (sasiounit_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET
 892                     || sasiounit_request->Operation ==
 893                     MPI2_SAS_OP_PHY_LINK_RESET) {
 894                         ioc->ioc_link_reset_in_progress = 1;
 895                         ioc->ignore_loginfos = 1;
 896                 }
 897                 mpt2sas_base_put_smid_default(ioc, smid);
 898                 break;
 899         }
 900         default:
 901                 mpt2sas_base_put_smid_default(ioc, smid);
 902                 break;
 903         }
 904
 905         if (karg.timeout < MPT2_IOCTL_DEFAULT_TIMEOUT)
 906                 timeout = MPT2_IOCTL_DEFAULT_TIMEOUT;
 907         else
 908                 timeout = karg.timeout;
 909         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
 910             timeout*HZ);
 911         if (mpi_request->Function == MPI2_FUNCTION_SCSI_TASK_MGMT) {
 912                 Mpi2SCSITaskManagementRequest_t *tm_request =
 913                     (Mpi2SCSITaskManagementRequest_t *)mpi_request;
 914                 mpt2sas_scsih_clear_tm_flag(ioc, le16_to_cpu(
 915                     tm_request->DevHandle));
 916         } else if ((mpi_request->Function == MPI2_FUNCTION_SMP_PASSTHROUGH ||
 917             mpi_request->Function == MPI2_FUNCTION_SAS_IO_UNIT_CONTROL) &&
 918                 ioc->ioc_link_reset_in_progress) {
 919                 ioc->ioc_link_reset_in_progress = 0;
 920                 ioc->ignore_loginfos = 0;
 921         }
 922         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
 923                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
 924                     __func__);
 925                 _debug_dump_mf(mpi_request, karg.data_sge_offset);
 926                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
 927                         issue_reset = 1;
 928                 goto issue_host_reset;
 929         }
 930
 931         mpi_reply = ioc->ctl_cmds.reply;
 932         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
 933
 934 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 935         if (mpi_reply->Function == MPI2_FUNCTION_SCSI_TASK_MGMT &&
 936             (ioc->logging_level & MPT_DEBUG_TM)) {
 937                 Mpi2SCSITaskManagementReply_t *tm_reply =
 938                     (Mpi2SCSITaskManagementReply_t *)mpi_reply;
 939
 940                 printk(MPT2SAS_INFO_FMT "TASK_MGMT: "
 941                     "IOCStatus(0x%04x), IOCLogInfo(0x%08x), "
 942                     "TerminationCount(0x%08x)\n", ioc->name,
 943                     le16_to_cpu(tm_reply->IOCStatus),
 944                     le32_to_cpu(tm_reply->IOCLogInfo),
 945                     le32_to_cpu(tm_reply->TerminationCount));
 946         }
 947 #endif
 948         /* copy out xdata to user */
 949         if (data_in_sz) {
 950                 if (copy_to_user(karg.data_in_buf_ptr, data_in,
 951                     data_in_sz)) {
 952                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 953                             __LINE__, __func__);
 954                         ret = -ENODATA;
 955                         goto out;
 956                 }
 957         }
 958
 959         /* copy out reply message frame to user */
 960         if (karg.max_reply_bytes) {
 961                 sz = min_t(u32, karg.max_reply_bytes, ioc->reply_sz);
 962                 if (copy_to_user(karg.reply_frame_buf_ptr, ioc->ctl_cmds.reply,
 963                     sz)) {
 964                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 965                             __LINE__, __func__);
 966                         ret = -ENODATA;
 967                         goto out;
 968                 }
 969         }
 970
 971         /* copy out sense to user */
 972         if (karg.max_sense_bytes && (mpi_request->Function ==
 973             MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function ==
 974             MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) {
 975                 sz = min_t(u32, karg.max_sense_bytes, SCSI_SENSE_BUFFERSIZE);
 976                 if (copy_to_user(karg.sense_data_ptr,
 977                         ioc->ctl_cmds.sense, sz)) {
 978                         printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__,
 979                             __LINE__, __func__);
 980                         ret = -ENODATA;
 981                         goto out;
 982                 }
 983         }
 984
 985  issue_host_reset:
 986         if (issue_reset) {
 987                 ret = -ENODATA;
 988                 if ((mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 989                     mpi_request->Function ==
 990                     MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 991                     mpi_request->Function == MPI2_FUNCTION_SATA_PASSTHROUGH)) {
 992                         printk(MPT2SAS_INFO_FMT "issue target reset: handle "
 993                             "= (0x%04x)\n", ioc->name,
 994                             le16_to_cpu(mpi_request->FunctionDependent1));
 995                         mpt2sas_halt_firmware(ioc);
 996                         mpt2sas_scsih_issue_tm(ioc,
 997                             le16_to_cpu(mpi_request->FunctionDependent1), 0, 0,
 998                             0, MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET, 0, 10,
 999                             0, TM_MUTEX_ON);
1000                         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
1001                 } else
1002                         mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1003                             FORCE_BIG_HAMMER);
1004         }
1005
1006  out:
1007
1008         /* free memory associated with sg buffers */
1009         if (data_in)
1010                 pci_free_consistent(ioc->pdev, data_in_sz, data_in,
1011                     data_in_dma);
1012
1013         if (data_out)
1014                 pci_free_consistent(ioc->pdev, data_out_sz, data_out,
1015                     data_out_dma);
1016
1017         kfree(mpi_request);
1018         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1019         return ret;
1020 }
1021
1022 /**
1023  * _ctl_getiocinfo - main handler for MPT2IOCINFO opcode
1024  * @ioc: per adapter object
1025  * @arg - user space buffer containing ioctl content
1026  */
1027 static long
1028 _ctl_getiocinfo(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1029 {
1030         struct mpt2_ioctl_iocinfo karg;
1031
1032         if (copy_from_user(&karg, arg, sizeof(karg))) {
1033                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1034                     __FILE__, __LINE__, __func__);
1035                 return -EFAULT;
1036         }
1037
1038         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1039             __func__));
1040
1041         memset(&karg, 0 , sizeof(karg));
1042         if (ioc->is_warpdrive)
1043                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2_SSS6200;
1044         else
1045                 karg.adapter_type = MPT2_IOCTL_INTERFACE_SAS2;
1046         if (ioc->pfacts)
1047                 karg.port_number = ioc->pfacts[0].PortNumber;
1048         karg.hw_rev = ioc->pdev->revision;
1049         karg.pci_id = ioc->pdev->device;
1050         karg.subsystem_device = ioc->pdev->subsystem_device;
1051         karg.subsystem_vendor = ioc->pdev->subsystem_vendor;
1052         karg.pci_information.u.bits.bus = ioc->pdev->bus->number;
1053         karg.pci_information.u.bits.device = PCI_SLOT(ioc->pdev->devfn);
1054         karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
1055         karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
1056         karg.firmware_version = ioc->facts.FWVersion.Word;
1057         strcpy(karg.driver_version, MPT2SAS_DRIVER_NAME);
1058         strcat(karg.driver_version, "-");
1059         strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
1060         karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
1061
1062         if (copy_to_user(arg, &karg, sizeof(karg))) {
1063                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1064                     __FILE__, __LINE__, __func__);
1065                 return -EFAULT;
1066         }
1067         return 0;
1068 }
1069
1070 /**
1071  * _ctl_eventquery - main handler for MPT2EVENTQUERY opcode
1072  * @ioc: per adapter object
1073  * @arg - user space buffer containing ioctl content
1074  */
1075 static long
1076 _ctl_eventquery(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1077 {
1078         struct mpt2_ioctl_eventquery karg;
1079
1080         if (copy_from_user(&karg, arg, sizeof(karg))) {
1081                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1082                     __FILE__, __LINE__, __func__);
1083                 return -EFAULT;
1084         }
1085
1086         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1087             __func__));
1088
1089         karg.event_entries = MPT2SAS_CTL_EVENT_LOG_SIZE;
1090         memcpy(karg.event_types, ioc->event_type,
1091             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1092
1093         if (copy_to_user(arg, &karg, sizeof(karg))) {
1094                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1095                     __FILE__, __LINE__, __func__);
1096                 return -EFAULT;
1097         }
1098         return 0;
1099 }
1100
1101 /**
1102  * _ctl_eventenable - main handler for MPT2EVENTENABLE opcode
1103  * @ioc: per adapter object
1104  * @arg - user space buffer containing ioctl content
1105  */
1106 static long
1107 _ctl_eventenable(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1108 {
1109         struct mpt2_ioctl_eventenable karg;
1110
1111         if (copy_from_user(&karg, arg, sizeof(karg))) {
1112                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1113                     __FILE__, __LINE__, __func__);
1114                 return -EFAULT;
1115         }
1116
1117         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1118             __func__));
1119
1120         if (ioc->event_log)
1121                 return 0;
1122         memcpy(ioc->event_type, karg.event_types,
1123             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS * sizeof(u32));
1124         mpt2sas_base_validate_event_type(ioc, ioc->event_type);
1125
1126         /* initialize event_log */
1127         ioc->event_context = 0;
1128         ioc->aen_event_read_flag = 0;
1129         ioc->event_log = kcalloc(MPT2SAS_CTL_EVENT_LOG_SIZE,
1130             sizeof(struct MPT2_IOCTL_EVENTS), GFP_KERNEL);
1131         if (!ioc->event_log) {
1132                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1133                     __FILE__, __LINE__, __func__);
1134                 return -ENOMEM;
1135         }
1136         return 0;
1137 }
1138
1139 /**
1140  * _ctl_eventreport - main handler for MPT2EVENTREPORT opcode
1141  * @ioc: per adapter object
1142  * @arg - user space buffer containing ioctl content
1143  */
1144 static long
1145 _ctl_eventreport(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1146 {
1147         struct mpt2_ioctl_eventreport karg;
1148         u32 number_bytes, max_events, max;
1149         struct mpt2_ioctl_eventreport __user *uarg = arg;
1150
1151         if (copy_from_user(&karg, arg, sizeof(karg))) {
1152                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1153                     __FILE__, __LINE__, __func__);
1154                 return -EFAULT;
1155         }
1156
1157         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1158             __func__));
1159
1160         number_bytes = karg.hdr.max_data_size -
1161             sizeof(struct mpt2_ioctl_header);
1162         max_events = number_bytes/sizeof(struct MPT2_IOCTL_EVENTS);
1163         max = min_t(u32, MPT2SAS_CTL_EVENT_LOG_SIZE, max_events);
1164
1165         /* If fewer than 1 event is requested, there must have
1166          * been some type of error.
1167          */
1168         if (!max || !ioc->event_log)
1169                 return -ENODATA;
1170
1171         number_bytes = max * sizeof(struct MPT2_IOCTL_EVENTS);
1172         if (copy_to_user(uarg->event_data, ioc->event_log, number_bytes)) {
1173                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1174                     __FILE__, __LINE__, __func__);
1175                 return -EFAULT;
1176         }
1177
1178         /* reset flag so SIGIO can restart */
1179         ioc->aen_event_read_flag = 0;
1180         return 0;
1181 }
1182
1183 /**
1184  * _ctl_do_reset - main handler for MPT2HARDRESET opcode
1185  * @ioc: per adapter object
1186  * @arg - user space buffer containing ioctl content
1187  */
1188 static long
1189 _ctl_do_reset(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1190 {
1191         struct mpt2_ioctl_diag_reset karg;
1192         int retval;
1193
1194         if (copy_from_user(&karg, arg, sizeof(karg))) {
1195                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1196                     __FILE__, __LINE__, __func__);
1197                 return -EFAULT;
1198         }
1199
1200         if (ioc->shost_recovery || ioc->pci_error_recovery ||
1201                 ioc->is_driver_loading)
1202                 return -EAGAIN;
1203         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
1204             __func__));
1205
1206         retval = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1207             FORCE_BIG_HAMMER);
1208         printk(MPT2SAS_INFO_FMT "host reset: %s\n",
1209             ioc->name, ((!retval) ? "SUCCESS" : "FAILED"));
1210         return 0;
1211 }
1212
1213 /**
1214  * _ctl_btdh_search_sas_device - searching for sas device
1215  * @ioc: per adapter object
1216  * @btdh: btdh ioctl payload
1217  */
1218 static int
1219 _ctl_btdh_search_sas_device(struct MPT2SAS_ADAPTER *ioc,
1220     struct mpt2_ioctl_btdh_mapping *btdh)
1221 {
1222         struct _sas_device *sas_device;
1223         unsigned long flags;
1224         int rc = 0;
1225
1226         if (list_empty(&ioc->sas_device_list))
1227                 return rc;
1228
1229         spin_lock_irqsave(&ioc->sas_device_lock, flags);
1230         list_for_each_entry(sas_device, &ioc->sas_device_list, list) {
1231                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1232                     btdh->handle == sas_device->handle) {
1233                         btdh->bus = sas_device->channel;
1234                         btdh->id = sas_device->id;
1235                         rc = 1;
1236                         goto out;
1237                 } else if (btdh->bus == sas_device->channel && btdh->id ==
1238                     sas_device->id && btdh->handle == 0xFFFF) {
1239                         btdh->handle = sas_device->handle;
1240                         rc = 1;
1241                         goto out;
1242                 }
1243         }
1244  out:
1245         spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
1246         return rc;
1247 }
1248
1249 /**
1250  * _ctl_btdh_search_raid_device - searching for raid device
1251  * @ioc: per adapter object
1252  * @btdh: btdh ioctl payload
1253  */
1254 static int
1255 _ctl_btdh_search_raid_device(struct MPT2SAS_ADAPTER *ioc,
1256     struct mpt2_ioctl_btdh_mapping *btdh)
1257 {
1258         struct _raid_device *raid_device;
1259         unsigned long flags;
1260         int rc = 0;
1261
1262         if (list_empty(&ioc->raid_device_list))
1263                 return rc;
1264
1265         spin_lock_irqsave(&ioc->raid_device_lock, flags);
1266         list_for_each_entry(raid_device, &ioc->raid_device_list, list) {
1267                 if (btdh->bus == 0xFFFFFFFF && btdh->id == 0xFFFFFFFF &&
1268                     btdh->handle == raid_device->handle) {
1269                         btdh->bus = raid_device->channel;
1270                         btdh->id = raid_device->id;
1271                         rc = 1;
1272                         goto out;
1273                 } else if (btdh->bus == raid_device->channel && btdh->id ==
1274                     raid_device->id && btdh->handle == 0xFFFF) {
1275                         btdh->handle = raid_device->handle;
1276                         rc = 1;
1277                         goto out;
1278                 }
1279         }
1280  out:
1281         spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
1282         return rc;
1283 }
1284
1285 /**
1286  * _ctl_btdh_mapping - main handler for MPT2BTDHMAPPING opcode
1287  * @ioc: per adapter object
1288  * @arg - user space buffer containing ioctl content
1289  */
1290 static long
1291 _ctl_btdh_mapping(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1292 {
1293         struct mpt2_ioctl_btdh_mapping karg;
1294         int rc;
1295
1296         if (copy_from_user(&karg, arg, sizeof(karg))) {
1297                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1298                     __FILE__, __LINE__, __func__);
1299                 return -EFAULT;
1300         }
1301
1302         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1303             __func__));
1304
1305         rc = _ctl_btdh_search_sas_device(ioc, &karg);
1306         if (!rc)
1307                 _ctl_btdh_search_raid_device(ioc, &karg);
1308
1309         if (copy_to_user(arg, &karg, sizeof(karg))) {
1310                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1311                     __FILE__, __LINE__, __func__);
1312                 return -EFAULT;
1313         }
1314         return 0;
1315 }
1316
1317 /**
1318  * _ctl_diag_capability - return diag buffer capability
1319  * @ioc: per adapter object
1320  * @buffer_type: specifies either TRACE, SNAPSHOT, or EXTENDED
1321  *
1322  * returns 1 when diag buffer support is enabled in firmware
1323  */
1324 static u8
1325 _ctl_diag_capability(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type)
1326 {
1327         u8 rc = 0;
1328
1329         switch (buffer_type) {
1330         case MPI2_DIAG_BUF_TYPE_TRACE:
1331                 if (ioc->facts.IOCCapabilities &
1332                     MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER)
1333                         rc = 1;
1334                 break;
1335         case MPI2_DIAG_BUF_TYPE_SNAPSHOT:
1336                 if (ioc->facts.IOCCapabilities &
1337                     MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER)
1338                         rc = 1;
1339                 break;
1340         case MPI2_DIAG_BUF_TYPE_EXTENDED:
1341                 if (ioc->facts.IOCCapabilities &
1342                     MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER)
1343                         rc = 1;
1344         }
1345
1346         return rc;
1347 }
1348
1349 /**
1350  * _ctl_diag_register_2 - wrapper for registering diag buffer support
1351  * @ioc: per adapter object
1352  * @diag_register: the diag_register struct passed in from user space
1353  *
1354  */
1355 static long
1356 _ctl_diag_register_2(struct MPT2SAS_ADAPTER *ioc,
1357     struct mpt2_diag_register *diag_register)
1358 {
1359         int rc, i;
1360         void *request_data = NULL;
1361         dma_addr_t request_data_dma;
1362         u32 request_data_sz = 0;
1363         Mpi2DiagBufferPostRequest_t *mpi_request;
1364         Mpi2DiagBufferPostReply_t *mpi_reply;
1365         u8 buffer_type;
1366         unsigned long timeleft;
1367         u16 smid;
1368         u16 ioc_status;
1369         u8 issue_reset = 0;
1370
1371         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1372             __func__));
1373
1374         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1375                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1376                     ioc->name, __func__);
1377                 rc = -EAGAIN;
1378                 goto out;
1379         }
1380
1381         buffer_type = diag_register->buffer_type;
1382         if (!_ctl_diag_capability(ioc, buffer_type)) {
1383                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1384                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1385                 return -EPERM;
1386         }
1387
1388         if (ioc->diag_buffer_status[buffer_type] &
1389             MPT2_DIAG_BUFFER_IS_REGISTERED) {
1390                 printk(MPT2SAS_ERR_FMT "%s: already has a registered "
1391                     "buffer for buffer_type(0x%02x)\n", ioc->name, __func__,
1392                     buffer_type);
1393                 return -EINVAL;
1394         }
1395
1396         if (diag_register->requested_buffer_size % 4)  {
1397                 printk(MPT2SAS_ERR_FMT "%s: the requested_buffer_size "
1398                     "is not 4 byte aligned\n", ioc->name, __func__);
1399                 return -EINVAL;
1400         }
1401
1402         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1403         if (!smid) {
1404                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1405                     ioc->name, __func__);
1406                 rc = -EAGAIN;
1407                 goto out;
1408         }
1409
1410         rc = 0;
1411         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1412         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1413         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1414         ioc->ctl_cmds.smid = smid;
1415
1416         request_data = ioc->diag_buffer[buffer_type];
1417         request_data_sz = diag_register->requested_buffer_size;
1418         ioc->unique_id[buffer_type] = diag_register->unique_id;
1419         ioc->diag_buffer_status[buffer_type] = 0;
1420         memcpy(ioc->product_specific[buffer_type],
1421             diag_register->product_specific, MPT2_PRODUCT_SPECIFIC_DWORDS);
1422         ioc->diagnostic_flags[buffer_type] = diag_register->diagnostic_flags;
1423
1424         if (request_data) {
1425                 request_data_dma = ioc->diag_buffer_dma[buffer_type];
1426                 if (request_data_sz != ioc->diag_buffer_sz[buffer_type]) {
1427                         pci_free_consistent(ioc->pdev,
1428                             ioc->diag_buffer_sz[buffer_type],
1429                             request_data, request_data_dma);
1430                         request_data = NULL;
1431                 }
1432         }
1433
1434         if (request_data == NULL) {
1435                 ioc->diag_buffer_sz[buffer_type] = 0;
1436                 ioc->diag_buffer_dma[buffer_type] = 0;
1437                 request_data = pci_alloc_consistent(
1438                         ioc->pdev, request_data_sz, &request_data_dma);
1439                 if (request_data == NULL) {
1440                         printk(MPT2SAS_ERR_FMT "%s: failed allocating memory"
1441                             " for diag buffers, requested size(%d)\n",
1442                             ioc->name, __func__, request_data_sz);
1443                         mpt2sas_base_free_smid(ioc, smid);
1444                         return -ENOMEM;
1445                 }
1446                 ioc->diag_buffer[buffer_type] = request_data;
1447                 ioc->diag_buffer_sz[buffer_type] = request_data_sz;
1448                 ioc->diag_buffer_dma[buffer_type] = request_data_dma;
1449         }
1450
1451         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
1452         mpi_request->BufferType = diag_register->buffer_type;
1453         mpi_request->Flags = cpu_to_le32(diag_register->diagnostic_flags);
1454         mpi_request->BufferAddress = cpu_to_le64(request_data_dma);
1455         mpi_request->BufferLength = cpu_to_le32(request_data_sz);
1456         mpi_request->VF_ID = 0; /* TODO */
1457         mpi_request->VP_ID = 0;
1458
1459         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(0x%p), "
1460             "dma(0x%llx), sz(%d)\n", ioc->name, __func__, request_data,
1461             (unsigned long long)request_data_dma,
1462             le32_to_cpu(mpi_request->BufferLength)));
1463
1464         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1465                 mpi_request->ProductSpecific[i] =
1466                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
1467
1468         init_completion(&ioc->ctl_cmds.done);
1469         mpt2sas_base_put_smid_default(ioc, smid);
1470         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1471             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1472
1473         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1474                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1475                     __func__);
1476                 _debug_dump_mf(mpi_request,
1477                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
1478                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1479                         issue_reset = 1;
1480                 goto issue_host_reset;
1481         }
1482
1483         /* process the completed Reply Message Frame */
1484         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1485                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1486                     ioc->name, __func__);
1487                 rc = -EFAULT;
1488                 goto out;
1489         }
1490
1491         mpi_reply = ioc->ctl_cmds.reply;
1492         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1493
1494         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1495                 ioc->diag_buffer_status[buffer_type] |=
1496                         MPT2_DIAG_BUFFER_IS_REGISTERED;
1497                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1498                     ioc->name, __func__));
1499         } else {
1500                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1501                     "log_info(0x%08x)\n", ioc->name, __func__,
1502                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1503                 rc = -EFAULT;
1504         }
1505
1506  issue_host_reset:
1507         if (issue_reset)
1508                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1509                     FORCE_BIG_HAMMER);
1510
1511  out:
1512
1513         if (rc && request_data)
1514                 pci_free_consistent(ioc->pdev, request_data_sz,
1515                     request_data, request_data_dma);
1516
1517         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1518         return rc;
1519 }
1520
1521 /**
1522  * mpt2sas_enable_diag_buffer - enabling diag_buffers support driver load time
1523  * @ioc: per adapter object
1524  * @bits_to_register: bitwise field where trace is bit 0, and snapshot is bit 1
1525  *
1526  * This is called when command line option diag_buffer_enable is enabled
1527  * at driver load time.
1528  */
1529 void
1530 mpt2sas_enable_diag_buffer(struct MPT2SAS_ADAPTER *ioc, u8 bits_to_register)
1531 {
1532         struct mpt2_diag_register diag_register;
1533
1534         memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
1535
1536         if (bits_to_register & 1) {
1537                 printk(MPT2SAS_INFO_FMT "registering trace buffer support\n",
1538                     ioc->name);
1539                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
1540                 /* register for 1MB buffers  */
1541                 diag_register.requested_buffer_size = (1024 * 1024);
1542                 diag_register.unique_id = 0x7075900;
1543                 _ctl_diag_register_2(ioc,  &diag_register);
1544         }
1545
1546         if (bits_to_register & 2) {
1547                 printk(MPT2SAS_INFO_FMT "registering snapshot buffer support\n",
1548                     ioc->name);
1549                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_SNAPSHOT;
1550                 /* register for 2MB buffers  */
1551                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1552                 diag_register.unique_id = 0x7075901;
1553                 _ctl_diag_register_2(ioc,  &diag_register);
1554         }
1555
1556         if (bits_to_register & 4) {
1557                 printk(MPT2SAS_INFO_FMT "registering extended buffer support\n",
1558                     ioc->name);
1559                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_EXTENDED;
1560                 /* register for 2MB buffers  */
1561                 diag_register.requested_buffer_size = 2 * (1024 * 1024);
1562                 diag_register.unique_id = 0x7075901;
1563                 _ctl_diag_register_2(ioc,  &diag_register);
1564         }
1565 }
1566
1567 /**
1568  * _ctl_diag_register - application register with driver
1569  * @ioc: per adapter object
1570  * @arg - user space buffer containing ioctl content
1571  *
1572  * This will allow the driver to setup any required buffers that will be
1573  * needed by firmware to communicate with the driver.
1574  */
1575 static long
1576 _ctl_diag_register(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1577 {
1578         struct mpt2_diag_register karg;
1579         long rc;
1580
1581         if (copy_from_user(&karg, arg, sizeof(karg))) {
1582                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1583                     __FILE__, __LINE__, __func__);
1584                 return -EFAULT;
1585         }
1586
1587         rc = _ctl_diag_register_2(ioc, &karg);
1588         return rc;
1589 }
1590
1591 /**
1592  * _ctl_diag_unregister - application unregister with driver
1593  * @ioc: per adapter object
1594  * @arg - user space buffer containing ioctl content
1595  *
1596  * This will allow the driver to cleanup any memory allocated for diag
1597  * messages and to free up any resources.
1598  */
1599 static long
1600 _ctl_diag_unregister(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1601 {
1602         struct mpt2_diag_unregister karg;
1603         void *request_data;
1604         dma_addr_t request_data_dma;
1605         u32 request_data_sz;
1606         u8 buffer_type;
1607
1608         if (copy_from_user(&karg, arg, sizeof(karg))) {
1609                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1610                     __FILE__, __LINE__, __func__);
1611                 return -EFAULT;
1612         }
1613
1614         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1615             __func__));
1616
1617         buffer_type = karg.unique_id & 0x000000ff;
1618         if (!_ctl_diag_capability(ioc, buffer_type)) {
1619                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1620                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1621                 return -EPERM;
1622         }
1623
1624         if ((ioc->diag_buffer_status[buffer_type] &
1625             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1626                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1627                     "registered\n", ioc->name, __func__, buffer_type);
1628                 return -EINVAL;
1629         }
1630         if ((ioc->diag_buffer_status[buffer_type] &
1631             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
1632                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) has not been "
1633                     "released\n", ioc->name, __func__, buffer_type);
1634                 return -EINVAL;
1635         }
1636
1637         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1638                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1639                     "registered\n", ioc->name, __func__, karg.unique_id);
1640                 return -EINVAL;
1641         }
1642
1643         request_data = ioc->diag_buffer[buffer_type];
1644         if (!request_data) {
1645                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1646                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1647                 return -ENOMEM;
1648         }
1649
1650         request_data_sz = ioc->diag_buffer_sz[buffer_type];
1651         request_data_dma = ioc->diag_buffer_dma[buffer_type];
1652         pci_free_consistent(ioc->pdev, request_data_sz,
1653             request_data, request_data_dma);
1654         ioc->diag_buffer[buffer_type] = NULL;
1655         ioc->diag_buffer_status[buffer_type] = 0;
1656         return 0;
1657 }
1658
1659 /**
1660  * _ctl_diag_query - query relevant info associated with diag buffers
1661  * @ioc: per adapter object
1662  * @arg - user space buffer containing ioctl content
1663  *
1664  * The application will send only buffer_type and unique_id.  Driver will
1665  * inspect unique_id first, if valid, fill in all the info.  If unique_id is
1666  * 0x00, the driver will return info specified by Buffer Type.
1667  */
1668 static long
1669 _ctl_diag_query(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1670 {
1671         struct mpt2_diag_query karg;
1672         void *request_data;
1673         int i;
1674         u8 buffer_type;
1675
1676         if (copy_from_user(&karg, arg, sizeof(karg))) {
1677                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1678                     __FILE__, __LINE__, __func__);
1679                 return -EFAULT;
1680         }
1681
1682         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1683             __func__));
1684
1685         karg.application_flags = 0;
1686         buffer_type = karg.buffer_type;
1687
1688         if (!_ctl_diag_capability(ioc, buffer_type)) {
1689                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1690                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1691                 return -EPERM;
1692         }
1693
1694         if ((ioc->diag_buffer_status[buffer_type] &
1695             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1696                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1697                     "registered\n", ioc->name, __func__, buffer_type);
1698                 return -EINVAL;
1699         }
1700
1701         if (karg.unique_id & 0xffffff00) {
1702                 if (karg.unique_id != ioc->unique_id[buffer_type]) {
1703                         printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1704                             "registered\n", ioc->name, __func__,
1705                             karg.unique_id);
1706                         return -EINVAL;
1707                 }
1708         }
1709
1710         request_data = ioc->diag_buffer[buffer_type];
1711         if (!request_data) {
1712                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1713                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1714                 return -ENOMEM;
1715         }
1716
1717         if (ioc->diag_buffer_status[buffer_type] & MPT2_DIAG_BUFFER_IS_RELEASED)
1718                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1719                     MPT2_APP_FLAGS_BUFFER_VALID);
1720         else
1721                 karg.application_flags = (MPT2_APP_FLAGS_APP_OWNED |
1722                     MPT2_APP_FLAGS_BUFFER_VALID |
1723                     MPT2_APP_FLAGS_FW_BUFFER_ACCESS);
1724
1725         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
1726                 karg.product_specific[i] =
1727                     ioc->product_specific[buffer_type][i];
1728
1729         karg.total_buffer_size = ioc->diag_buffer_sz[buffer_type];
1730         karg.driver_added_buffer_size = 0;
1731         karg.unique_id = ioc->unique_id[buffer_type];
1732         karg.diagnostic_flags = ioc->diagnostic_flags[buffer_type];
1733
1734         if (copy_to_user(arg, &karg, sizeof(struct mpt2_diag_query))) {
1735                 printk(MPT2SAS_ERR_FMT "%s: unable to write mpt2_diag_query "
1736                     "data @ %p\n", ioc->name, __func__, arg);
1737                 return -EFAULT;
1738         }
1739         return 0;
1740 }
1741
1742 /**
1743  * _ctl_send_release - Diag Release Message
1744  * @ioc: per adapter object
1745  * @buffer_type - specifies either TRACE, SNAPSHOT, or EXTENDED
1746  * @issue_reset - specifies whether host reset is required.
1747  *
1748  */
1749 static int
1750 _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type, u8 *issue_reset)
1751 {
1752         Mpi2DiagReleaseRequest_t *mpi_request;
1753         Mpi2DiagReleaseReply_t *mpi_reply;
1754         u16 smid;
1755         u16 ioc_status;
1756         u32 ioc_state;
1757         int rc;
1758         unsigned long timeleft;
1759
1760         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1761             __func__));
1762
1763         rc = 0;
1764         *issue_reset = 0;
1765
1766         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
1767         if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
1768                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
1769                     "skipping due to FAULT state\n", ioc->name,
1770                     __func__));
1771                 rc = -EAGAIN;
1772                 goto out;
1773         }
1774
1775         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
1776                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
1777                     ioc->name, __func__);
1778                 rc = -EAGAIN;
1779                 goto out;
1780         }
1781
1782         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
1783         if (!smid) {
1784                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
1785                     ioc->name, __func__);
1786                 rc = -EAGAIN;
1787                 goto out;
1788         }
1789
1790         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
1791         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
1792         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
1793         ioc->ctl_cmds.smid = smid;
1794
1795         mpi_request->Function = MPI2_FUNCTION_DIAG_RELEASE;
1796         mpi_request->BufferType = buffer_type;
1797         mpi_request->VF_ID = 0; /* TODO */
1798         mpi_request->VP_ID = 0;
1799
1800         init_completion(&ioc->ctl_cmds.done);
1801         mpt2sas_base_put_smid_default(ioc, smid);
1802         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
1803             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
1804
1805         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
1806                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
1807                     __func__);
1808                 _debug_dump_mf(mpi_request,
1809                     sizeof(Mpi2DiagReleaseRequest_t)/4);
1810                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
1811                         *issue_reset = 1;
1812                 rc = -EFAULT;
1813                 goto out;
1814         }
1815
1816         /* process the completed Reply Message Frame */
1817         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
1818                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
1819                     ioc->name, __func__);
1820                 rc = -EFAULT;
1821                 goto out;
1822         }
1823
1824         mpi_reply = ioc->ctl_cmds.reply;
1825         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
1826
1827         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
1828                 ioc->diag_buffer_status[buffer_type] |=
1829                     MPT2_DIAG_BUFFER_IS_RELEASED;
1830                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
1831                     ioc->name, __func__));
1832         } else {
1833                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
1834                     "log_info(0x%08x)\n", ioc->name, __func__,
1835                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
1836                 rc = -EFAULT;
1837         }
1838
1839  out:
1840         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
1841         return rc;
1842 }
1843
1844 /**
1845  * _ctl_diag_release - request to send Diag Release Message to firmware
1846  * @arg - user space buffer containing ioctl content
1847  *
1848  * This allows ownership of the specified buffer to returned to the driver,
1849  * allowing an application to read the buffer without fear that firmware is
1850  * overwritting information in the buffer.
1851  */
1852 static long
1853 _ctl_diag_release(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1854 {
1855         struct mpt2_diag_release karg;
1856         void *request_data;
1857         int rc;
1858         u8 buffer_type;
1859         u8 issue_reset = 0;
1860
1861         if (copy_from_user(&karg, arg, sizeof(karg))) {
1862                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1863                     __FILE__, __LINE__, __func__);
1864                 return -EFAULT;
1865         }
1866
1867         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1868             __func__));
1869
1870         buffer_type = karg.unique_id & 0x000000ff;
1871         if (!_ctl_diag_capability(ioc, buffer_type)) {
1872                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1873                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1874                 return -EPERM;
1875         }
1876
1877         if ((ioc->diag_buffer_status[buffer_type] &
1878             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
1879                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
1880                     "registered\n", ioc->name, __func__, buffer_type);
1881                 return -EINVAL;
1882         }
1883
1884         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1885                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1886                     "registered\n", ioc->name, __func__, karg.unique_id);
1887                 return -EINVAL;
1888         }
1889
1890         if (ioc->diag_buffer_status[buffer_type] &
1891             MPT2_DIAG_BUFFER_IS_RELEASED) {
1892                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1893                     "is already released\n", ioc->name, __func__,
1894                     buffer_type);
1895                 return 0;
1896         }
1897
1898         request_data = ioc->diag_buffer[buffer_type];
1899
1900         if (!request_data) {
1901                 printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
1902                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1903                 return -ENOMEM;
1904         }
1905
1906         /* buffers were released by due to host reset */
1907         if ((ioc->diag_buffer_status[buffer_type] &
1908             MPT2_DIAG_BUFFER_IS_DIAG_RESET)) {
1909                 ioc->diag_buffer_status[buffer_type] |=
1910                     MPT2_DIAG_BUFFER_IS_RELEASED;
1911                 ioc->diag_buffer_status[buffer_type] &=
1912                     ~MPT2_DIAG_BUFFER_IS_DIAG_RESET;
1913                 printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
1914                     "was released due to host reset\n", ioc->name, __func__,
1915                     buffer_type);
1916                 return 0;
1917         }
1918
1919         rc = _ctl_send_release(ioc, buffer_type, &issue_reset);
1920
1921         if (issue_reset)
1922                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
1923                     FORCE_BIG_HAMMER);
1924
1925         return rc;
1926 }
1927
1928 /**
1929  * _ctl_diag_read_buffer - request for copy of the diag buffer
1930  * @ioc: per adapter object
1931  * @arg - user space buffer containing ioctl content
1932  */
1933 static long
1934 _ctl_diag_read_buffer(struct MPT2SAS_ADAPTER *ioc, void __user *arg)
1935 {
1936         struct mpt2_diag_read_buffer karg;
1937         struct mpt2_diag_read_buffer __user *uarg = arg;
1938         void *request_data, *diag_data;
1939         Mpi2DiagBufferPostRequest_t *mpi_request;
1940         Mpi2DiagBufferPostReply_t *mpi_reply;
1941         int rc, i;
1942         u8 buffer_type;
1943         unsigned long timeleft, request_size, copy_size;
1944         u16 smid;
1945         u16 ioc_status;
1946         u8 issue_reset = 0;
1947
1948         if (copy_from_user(&karg, arg, sizeof(karg))) {
1949                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
1950                     __FILE__, __LINE__, __func__);
1951                 return -EFAULT;
1952         }
1953
1954         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1955             __func__));
1956
1957         buffer_type = karg.unique_id & 0x000000ff;
1958         if (!_ctl_diag_capability(ioc, buffer_type)) {
1959                 printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
1960                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1961                 return -EPERM;
1962         }
1963
1964         if (karg.unique_id != ioc->unique_id[buffer_type]) {
1965                 printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
1966                     "registered\n", ioc->name, __func__, karg.unique_id);
1967                 return -EINVAL;
1968         }
1969
1970         request_data = ioc->diag_buffer[buffer_type];
1971         if (!request_data) {
1972                 printk(MPT2SAS_ERR_FMT "%s: doesn't have buffer for "
1973                     "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
1974                 return -ENOMEM;
1975         }
1976
1977         request_size = ioc->diag_buffer_sz[buffer_type];
1978
1979         if ((karg.starting_offset % 4) || (karg.bytes_to_read % 4)) {
1980                 printk(MPT2SAS_ERR_FMT "%s: either the starting_offset "
1981                     "or bytes_to_read are not 4 byte aligned\n", ioc->name,
1982                     __func__);
1983                 return -EINVAL;
1984         }
1985
1986         if (karg.starting_offset > request_size)
1987                 return -EINVAL;
1988
1989         diag_data = (void *)(request_data + karg.starting_offset);
1990         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: diag_buffer(%p), "
1991             "offset(%d), sz(%d)\n", ioc->name, __func__,
1992             diag_data, karg.starting_offset, karg.bytes_to_read));
1993
1994         /* Truncate data on requests that are too large */
1995         if ((diag_data + karg.bytes_to_read < diag_data) ||
1996             (diag_data + karg.bytes_to_read > request_data + request_size))
1997                 copy_size = request_size - karg.starting_offset;
1998         else
1999                 copy_size = karg.bytes_to_read;
2000
2001         if (copy_to_user((void __user *)uarg->diagnostic_data,
2002             diag_data, copy_size)) {
2003                 printk(MPT2SAS_ERR_FMT "%s: Unable to write "
2004                     "mpt_diag_read_buffer_t data @ %p\n", ioc->name,
2005                     __func__, diag_data);
2006                 return -EFAULT;
2007         }
2008
2009         if ((karg.flags & MPT2_FLAGS_REREGISTER) == 0)
2010                 return 0;
2011
2012         dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: Reregister "
2013                 "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type));
2014         if ((ioc->diag_buffer_status[buffer_type] &
2015             MPT2_DIAG_BUFFER_IS_RELEASED) == 0) {
2016                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2017                     "buffer_type(0x%02x) is still registered\n", ioc->name,
2018                      __func__, buffer_type));
2019                 return 0;
2020         }
2021         /* Get a free request frame and save the message context.
2022         */
2023
2024         if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
2025                 printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
2026                     ioc->name, __func__);
2027                 rc = -EAGAIN;
2028                 goto out;
2029         }
2030
2031         smid = mpt2sas_base_get_smid(ioc, ioc->ctl_cb_idx);
2032         if (!smid) {
2033                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2034                     ioc->name, __func__);
2035                 rc = -EAGAIN;
2036                 goto out;
2037         }
2038
2039         rc = 0;
2040         ioc->ctl_cmds.status = MPT2_CMD_PENDING;
2041         memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
2042         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2043         ioc->ctl_cmds.smid = smid;
2044
2045         mpi_request->Function = MPI2_FUNCTION_DIAG_BUFFER_POST;
2046         mpi_request->BufferType = buffer_type;
2047         mpi_request->BufferLength =
2048             cpu_to_le32(ioc->diag_buffer_sz[buffer_type]);
2049         mpi_request->BufferAddress =
2050             cpu_to_le64(ioc->diag_buffer_dma[buffer_type]);
2051         for (i = 0; i < MPT2_PRODUCT_SPECIFIC_DWORDS; i++)
2052                 mpi_request->ProductSpecific[i] =
2053                         cpu_to_le32(ioc->product_specific[buffer_type][i]);
2054         mpi_request->VF_ID = 0; /* TODO */
2055         mpi_request->VP_ID = 0;
2056
2057         init_completion(&ioc->ctl_cmds.done);
2058         mpt2sas_base_put_smid_default(ioc, smid);
2059         timeleft = wait_for_completion_timeout(&ioc->ctl_cmds.done,
2060             MPT2_IOCTL_DEFAULT_TIMEOUT*HZ);
2061
2062         if (!(ioc->ctl_cmds.status & MPT2_CMD_COMPLETE)) {
2063                 printk(MPT2SAS_ERR_FMT "%s: timeout\n", ioc->name,
2064                     __func__);
2065                 _debug_dump_mf(mpi_request,
2066                     sizeof(Mpi2DiagBufferPostRequest_t)/4);
2067                 if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
2068                         issue_reset = 1;
2069                 goto issue_host_reset;
2070         }
2071
2072         /* process the completed Reply Message Frame */
2073         if ((ioc->ctl_cmds.status & MPT2_CMD_REPLY_VALID) == 0) {
2074                 printk(MPT2SAS_ERR_FMT "%s: no reply message\n",
2075                     ioc->name, __func__);
2076                 rc = -EFAULT;
2077                 goto out;
2078         }
2079
2080         mpi_reply = ioc->ctl_cmds.reply;
2081         ioc_status = le16_to_cpu(mpi_reply->IOCStatus) & MPI2_IOCSTATUS_MASK;
2082
2083         if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
2084                 ioc->diag_buffer_status[buffer_type] |=
2085                     MPT2_DIAG_BUFFER_IS_REGISTERED;
2086                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: success\n",
2087                     ioc->name, __func__));
2088         } else {
2089                 printk(MPT2SAS_INFO_FMT "%s: ioc_status(0x%04x) "
2090                     "log_info(0x%08x)\n", ioc->name, __func__,
2091                     ioc_status, le32_to_cpu(mpi_reply->IOCLogInfo));
2092                 rc = -EFAULT;
2093         }
2094
2095  issue_host_reset:
2096         if (issue_reset)
2097                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2098                     FORCE_BIG_HAMMER);
2099
2100  out:
2101
2102         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
2103         return rc;
2104 }
2105
2106
2107 #ifdef CONFIG_COMPAT
2108 /**
2109  * _ctl_compat_mpt_command - convert 32bit pointers to 64bit.
2110  * @ioc: per adapter object
2111  * @cmd - ioctl opcode
2112  * @arg - (struct mpt2_ioctl_command32)
2113  *
2114  * MPT2COMMAND32 - Handle 32bit applications running on 64bit os.
2115  */
2116 static long
2117 _ctl_compat_mpt_command(struct MPT2SAS_ADAPTER *ioc, unsigned cmd,
2118         void __user *arg)
2119 {
2120         struct mpt2_ioctl_command32 karg32;
2121         struct mpt2_ioctl_command32 __user *uarg;
2122         struct mpt2_ioctl_command karg;
2123
2124         if (_IOC_SIZE(cmd) != sizeof(struct mpt2_ioctl_command32))
2125                 return -EINVAL;
2126
2127         uarg = (struct mpt2_ioctl_command32 __user *) arg;
2128
2129         if (copy_from_user(&karg32, (char __user *)arg, sizeof(karg32))) {
2130                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2131                     __FILE__, __LINE__, __func__);
2132                 return -EFAULT;
2133         }
2134
2135         memset(&karg, 0, sizeof(struct mpt2_ioctl_command));
2136         karg.hdr.ioc_number = karg32.hdr.ioc_number;
2137         karg.hdr.port_number = karg32.hdr.port_number;
2138         karg.hdr.max_data_size = karg32.hdr.max_data_size;
2139         karg.timeout = karg32.timeout;
2140         karg.max_reply_bytes = karg32.max_reply_bytes;
2141         karg.data_in_size = karg32.data_in_size;
2142         karg.data_out_size = karg32.data_out_size;
2143         karg.max_sense_bytes = karg32.max_sense_bytes;
2144         karg.data_sge_offset = karg32.data_sge_offset;
2145         karg.reply_frame_buf_ptr = compat_ptr(karg32.reply_frame_buf_ptr);
2146         karg.data_in_buf_ptr = compat_ptr(karg32.data_in_buf_ptr);
2147         karg.data_out_buf_ptr = compat_ptr(karg32.data_out_buf_ptr);
2148         karg.sense_data_ptr = compat_ptr(karg32.sense_data_ptr);
2149         return _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2150 }
2151 #endif
2152
2153 /**
2154  * _ctl_ioctl_main - main ioctl entry point
2155  * @file - (struct file)
2156  * @cmd - ioctl opcode
2157  * @arg -
2158  * compat - handles 32 bit applications in 64bit os
2159  */
2160 static long
2161 _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg,
2162         u8 compat)
2163 {
2164         struct MPT2SAS_ADAPTER *ioc;
2165         struct mpt2_ioctl_header ioctl_header;
2166         enum block_state state;
2167         long ret = -EINVAL;
2168
2169         /* get IOCTL header */
2170         if (copy_from_user(&ioctl_header, (char __user *)arg,
2171             sizeof(struct mpt2_ioctl_header))) {
2172                 printk(KERN_ERR "failure at %s:%d/%s()!\n",
2173                     __FILE__, __LINE__, __func__);
2174                 return -EFAULT;
2175         }
2176
2177         if (_ctl_verify_adapter(ioctl_header.ioc_number, &ioc) == -1 || !ioc)
2178                 return -ENODEV;
2179         if (ioc->shost_recovery || ioc->pci_error_recovery ||
2180             ioc->is_driver_loading)
2181                 return -EAGAIN;
2182
2183         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING : BLOCKING;
2184         if (state == NON_BLOCKING && !mutex_trylock(&ioc->ctl_cmds.mutex))
2185                 return -EAGAIN;
2186         else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex))
2187                 return -ERESTARTSYS;
2188
2189         switch (cmd) {
2190         case MPT2IOCINFO:
2191                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_iocinfo))
2192                         ret = _ctl_getiocinfo(ioc, arg);
2193                 break;
2194 #ifdef CONFIG_COMPAT
2195         case MPT2COMMAND32:
2196 #endif
2197         case MPT2COMMAND:
2198         {
2199                 struct mpt2_ioctl_command __user *uarg;
2200                 struct mpt2_ioctl_command karg;
2201 #ifdef CONFIG_COMPAT
2202                 if (compat) {
2203                         ret = _ctl_compat_mpt_command(ioc, cmd, arg);
2204                         break;
2205                 }
2206 #endif
2207                 if (copy_from_user(&karg, arg, sizeof(karg))) {
2208                         printk(KERN_ERR "failure at %s:%d/%s()!\n",
2209                             __FILE__, __LINE__, __func__);
2210                         ret = -EFAULT;
2211                         break;
2212                 }
2213
2214                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_command)) {
2215                         uarg = arg;
2216                         ret = _ctl_do_mpt_command(ioc, karg, &uarg->mf);
2217                 }
2218                 break;
2219         }
2220         case MPT2EVENTQUERY:
2221                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventquery))
2222                         ret = _ctl_eventquery(ioc, arg);
2223                 break;
2224         case MPT2EVENTENABLE:
2225                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_eventenable))
2226                         ret = _ctl_eventenable(ioc, arg);
2227                 break;
2228         case MPT2EVENTREPORT:
2229                 ret = _ctl_eventreport(ioc, arg);
2230                 break;
2231         case MPT2HARDRESET:
2232                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_diag_reset))
2233                         ret = _ctl_do_reset(ioc, arg);
2234                 break;
2235         case MPT2BTDHMAPPING:
2236                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_btdh_mapping))
2237                         ret = _ctl_btdh_mapping(ioc, arg);
2238                 break;
2239         case MPT2DIAGREGISTER:
2240                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_register))
2241                         ret = _ctl_diag_register(ioc, arg);
2242                 break;
2243         case MPT2DIAGUNREGISTER:
2244                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_unregister))
2245                         ret = _ctl_diag_unregister(ioc, arg);
2246                 break;
2247         case MPT2DIAGQUERY:
2248                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_query))
2249                         ret = _ctl_diag_query(ioc, arg);
2250                 break;
2251         case MPT2DIAGRELEASE:
2252                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_release))
2253                         ret = _ctl_diag_release(ioc, arg);
2254                 break;
2255         case MPT2DIAGREADBUFFER:
2256                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_diag_read_buffer))
2257                         ret = _ctl_diag_read_buffer(ioc, arg);
2258                 break;
2259         default:
2260
2261                 dctlprintk(ioc, printk(MPT2SAS_INFO_FMT
2262                     "unsupported ioctl opcode(0x%08x)\n", ioc->name, cmd));
2263                 break;
2264         }
2265
2266         mutex_unlock(&ioc->ctl_cmds.mutex);
2267         return ret;
2268 }
2269
2270 /**
2271  * _ctl_ioctl - main ioctl entry point (unlocked)
2272  * @file - (struct file)
2273  * @cmd - ioctl opcode
2274  * @arg -
2275  */
2276 static long
2277 _ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
2278 {
2279         long ret;
2280
2281         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 0);
2282         return ret;
2283 }
2284 #ifdef CONFIG_COMPAT
2285 /**
2286  * _ctl_ioctl_compat - main ioctl entry point (compat)
2287  * @file -
2288  * @cmd -
2289  * @arg -
2290  *
2291  * This routine handles 32 bit applications in 64bit os.
2292  */
2293 static long
2294 _ctl_ioctl_compat(struct file *file, unsigned cmd, unsigned long arg)
2295 {
2296         long ret;
2297
2298         ret = _ctl_ioctl_main(file, cmd, (void __user *)arg, 1);
2299         return ret;
2300 }
2301 #endif
2302
2303 /* scsi host attributes */
2304
2305 /**
2306  * _ctl_version_fw_show - firmware version
2307  * @cdev - pointer to embedded class device
2308  * @buf - the buffer returned
2309  *
2310  * A sysfs 'read-only' shost attribute.
2311  */
2312 static ssize_t
2313 _ctl_version_fw_show(struct device *cdev, struct device_attribute *attr,
2314     char *buf)
2315 {
2316         struct Scsi_Host *shost = class_to_shost(cdev);
2317         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2318
2319         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2320             (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
2321             (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
2322             (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
2323             ioc->facts.FWVersion.Word & 0x000000FF);
2324 }
2325 static DEVICE_ATTR(version_fw, S_IRUGO, _ctl_version_fw_show, NULL);
2326
2327 /**
2328  * _ctl_version_bios_show - bios version
2329  * @cdev - pointer to embedded class device
2330  * @buf - the buffer returned
2331  *
2332  * A sysfs 'read-only' shost attribute.
2333  */
2334 static ssize_t
2335 _ctl_version_bios_show(struct device *cdev, struct device_attribute *attr,
2336     char *buf)
2337 {
2338         struct Scsi_Host *shost = class_to_shost(cdev);
2339         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2340
2341         u32 version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
2342
2343         return snprintf(buf, PAGE_SIZE, "%02d.%02d.%02d.%02d\n",
2344             (version & 0xFF000000) >> 24,
2345             (version & 0x00FF0000) >> 16,
2346             (version & 0x0000FF00) >> 8,
2347             version & 0x000000FF);
2348 }
2349 static DEVICE_ATTR(version_bios, S_IRUGO, _ctl_version_bios_show, NULL);
2350
2351 /**
2352  * _ctl_version_mpi_show - MPI (message passing interface) version
2353  * @cdev - pointer to embedded class device
2354  * @buf - the buffer returned
2355  *
2356  * A sysfs 'read-only' shost attribute.
2357  */
2358 static ssize_t
2359 _ctl_version_mpi_show(struct device *cdev, struct device_attribute *attr,
2360     char *buf)
2361 {
2362         struct Scsi_Host *shost = class_to_shost(cdev);
2363         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2364
2365         return snprintf(buf, PAGE_SIZE, "%03x.%02x\n",
2366             ioc->facts.MsgVersion, ioc->facts.HeaderVersion >> 8);
2367 }
2368 static DEVICE_ATTR(version_mpi, S_IRUGO, _ctl_version_mpi_show, NULL);
2369
2370 /**
2371  * _ctl_version_product_show - product name
2372  * @cdev - pointer to embedded class device
2373  * @buf - the buffer returned
2374  *
2375  * A sysfs 'read-only' shost attribute.
2376  */
2377 static ssize_t
2378 _ctl_version_product_show(struct device *cdev, struct device_attribute *attr,
2379     char *buf)
2380 {
2381         struct Scsi_Host *shost = class_to_shost(cdev);
2382         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2383
2384         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.ChipName);
2385 }
2386 static DEVICE_ATTR(version_product, S_IRUGO,
2387    _ctl_version_product_show, NULL);
2388
2389 /**
2390  * _ctl_version_nvdata_persistent_show - ndvata persistent version
2391  * @cdev - pointer to embedded class device
2392  * @buf - the buffer returned
2393  *
2394  * A sysfs 'read-only' shost attribute.
2395  */
2396 static ssize_t
2397 _ctl_version_nvdata_persistent_show(struct device *cdev,
2398     struct device_attribute *attr, char *buf)
2399 {
2400         struct Scsi_Host *shost = class_to_shost(cdev);
2401         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2402
2403         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2404             le32_to_cpu(ioc->iounit_pg0.NvdataVersionPersistent.Word));
2405 }
2406 static DEVICE_ATTR(version_nvdata_persistent, S_IRUGO,
2407     _ctl_version_nvdata_persistent_show, NULL);
2408
2409 /**
2410  * _ctl_version_nvdata_default_show - nvdata default version
2411  * @cdev - pointer to embedded class device
2412  * @buf - the buffer returned
2413  *
2414  * A sysfs 'read-only' shost attribute.
2415  */
2416 static ssize_t
2417 _ctl_version_nvdata_default_show(struct device *cdev,
2418     struct device_attribute *attr, char *buf)
2419 {
2420         struct Scsi_Host *shost = class_to_shost(cdev);
2421         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2422
2423         return snprintf(buf, PAGE_SIZE, "%08xh\n",
2424             le32_to_cpu(ioc->iounit_pg0.NvdataVersionDefault.Word));
2425 }
2426 static DEVICE_ATTR(version_nvdata_default, S_IRUGO,
2427     _ctl_version_nvdata_default_show, NULL);
2428
2429 /**
2430  * _ctl_board_name_show - board name
2431  * @cdev - pointer to embedded class device
2432  * @buf - the buffer returned
2433  *
2434  * A sysfs 'read-only' shost attribute.
2435  */
2436 static ssize_t
2437 _ctl_board_name_show(struct device *cdev, struct device_attribute *attr,
2438     char *buf)
2439 {
2440         struct Scsi_Host *shost = class_to_shost(cdev);
2441         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2442
2443         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardName);
2444 }
2445 static DEVICE_ATTR(board_name, S_IRUGO, _ctl_board_name_show, NULL);
2446
2447 /**
2448  * _ctl_board_assembly_show - board assembly name
2449  * @cdev - pointer to embedded class device
2450  * @buf - the buffer returned
2451  *
2452  * A sysfs 'read-only' shost attribute.
2453  */
2454 static ssize_t
2455 _ctl_board_assembly_show(struct device *cdev, struct device_attribute *attr,
2456     char *buf)
2457 {
2458         struct Scsi_Host *shost = class_to_shost(cdev);
2459         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2460
2461         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardAssembly);
2462 }
2463 static DEVICE_ATTR(board_assembly, S_IRUGO,
2464     _ctl_board_assembly_show, NULL);
2465
2466 /**
2467  * _ctl_board_tracer_show - board tracer number
2468  * @cdev - pointer to embedded class device
2469  * @buf - the buffer returned
2470  *
2471  * A sysfs 'read-only' shost attribute.
2472  */
2473 static ssize_t
2474 _ctl_board_tracer_show(struct device *cdev, struct device_attribute *attr,
2475     char *buf)
2476 {
2477         struct Scsi_Host *shost = class_to_shost(cdev);
2478         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2479
2480         return snprintf(buf, 16, "%s\n", ioc->manu_pg0.BoardTracerNumber);
2481 }
2482 static DEVICE_ATTR(board_tracer, S_IRUGO,
2483     _ctl_board_tracer_show, NULL);
2484
2485 /**
2486  * _ctl_io_delay_show - io missing delay
2487  * @cdev - pointer to embedded class device
2488  * @buf - the buffer returned
2489  *
2490  * This is for firmware implemention for deboucing device
2491  * removal events.
2492  *
2493  * A sysfs 'read-only' shost attribute.
2494  */
2495 static ssize_t
2496 _ctl_io_delay_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, PAGE_SIZE, "%02d\n", ioc->io_missing_delay);
2503 }
2504 static DEVICE_ATTR(io_delay, S_IRUGO,
2505     _ctl_io_delay_show, NULL);
2506
2507 /**
2508  * _ctl_device_delay_show - device missing delay
2509  * @cdev - pointer to embedded class device
2510  * @buf - the buffer returned
2511  *
2512  * This is for firmware implemention for deboucing device
2513  * removal events.
2514  *
2515  * A sysfs 'read-only' shost attribute.
2516  */
2517 static ssize_t
2518 _ctl_device_delay_show(struct device *cdev, struct device_attribute *attr,
2519     char *buf)
2520 {
2521         struct Scsi_Host *shost = class_to_shost(cdev);
2522         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2523
2524         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->device_missing_delay);
2525 }
2526 static DEVICE_ATTR(device_delay, S_IRUGO,
2527     _ctl_device_delay_show, NULL);
2528
2529 /**
2530  * _ctl_fw_queue_depth_show - global credits
2531  * @cdev - pointer to embedded class device
2532  * @buf - the buffer returned
2533  *
2534  * This is firmware queue depth limit
2535  *
2536  * A sysfs 'read-only' shost attribute.
2537  */
2538 static ssize_t
2539 _ctl_fw_queue_depth_show(struct device *cdev, struct device_attribute *attr,
2540     char *buf)
2541 {
2542         struct Scsi_Host *shost = class_to_shost(cdev);
2543         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2544
2545         return snprintf(buf, PAGE_SIZE, "%02d\n", ioc->facts.RequestCredit);
2546 }
2547 static DEVICE_ATTR(fw_queue_depth, S_IRUGO,
2548     _ctl_fw_queue_depth_show, NULL);
2549
2550 /**
2551  * _ctl_sas_address_show - sas address
2552  * @cdev - pointer to embedded class device
2553  * @buf - the buffer returned
2554  *
2555  * This is the controller sas address
2556  *
2557  * A sysfs 'read-only' shost attribute.
2558  */
2559 static ssize_t
2560 _ctl_host_sas_address_show(struct device *cdev, struct device_attribute *attr,
2561     char *buf)
2562 {
2563         struct Scsi_Host *shost = class_to_shost(cdev);
2564         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2565
2566         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2567             (unsigned long long)ioc->sas_hba.sas_address);
2568 }
2569 static DEVICE_ATTR(host_sas_address, S_IRUGO,
2570     _ctl_host_sas_address_show, NULL);
2571
2572 /**
2573  * _ctl_logging_level_show - logging level
2574  * @cdev - pointer to embedded class device
2575  * @buf - the buffer returned
2576  *
2577  * A sysfs 'read/write' shost attribute.
2578  */
2579 static ssize_t
2580 _ctl_logging_level_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, "%08xh\n", ioc->logging_level);
2587 }
2588 static ssize_t
2589 _ctl_logging_level_store(struct device *cdev, struct device_attribute *attr,
2590     const char *buf, size_t count)
2591 {
2592         struct Scsi_Host *shost = class_to_shost(cdev);
2593         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2594         int val = 0;
2595
2596         if (sscanf(buf, "%x", &val) != 1)
2597                 return -EINVAL;
2598
2599         ioc->logging_level = val;
2600         printk(MPT2SAS_INFO_FMT "logging_level=%08xh\n", ioc->name,
2601             ioc->logging_level);
2602         return strlen(buf);
2603 }
2604 static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR,
2605     _ctl_logging_level_show, _ctl_logging_level_store);
2606
2607 /* device attributes */
2608 /*
2609  * _ctl_fwfault_debug_show - show/store fwfault_debug
2610  * @cdev - pointer to embedded class device
2611  * @buf - the buffer returned
2612  *
2613  * mpt2sas_fwfault_debug is command line option
2614  * A sysfs 'read/write' shost attribute.
2615  */
2616 static ssize_t
2617 _ctl_fwfault_debug_show(struct device *cdev,
2618     struct device_attribute *attr, char *buf)
2619 {
2620         struct Scsi_Host *shost = class_to_shost(cdev);
2621         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2622
2623         return snprintf(buf, PAGE_SIZE, "%d\n", ioc->fwfault_debug);
2624 }
2625 static ssize_t
2626 _ctl_fwfault_debug_store(struct device *cdev,
2627     struct device_attribute *attr, const char *buf, size_t count)
2628 {
2629         struct Scsi_Host *shost = class_to_shost(cdev);
2630         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2631         int val = 0;
2632
2633         if (sscanf(buf, "%d", &val) != 1)
2634                 return -EINVAL;
2635
2636         ioc->fwfault_debug = val;
2637         printk(MPT2SAS_INFO_FMT "fwfault_debug=%d\n", ioc->name,
2638             ioc->fwfault_debug);
2639         return strlen(buf);
2640 }
2641 static DEVICE_ATTR(fwfault_debug, S_IRUGO | S_IWUSR,
2642     _ctl_fwfault_debug_show, _ctl_fwfault_debug_store);
2643
2644
2645 /**
2646  * _ctl_ioc_reset_count_show - ioc reset count
2647  * @cdev - pointer to embedded class device
2648  * @buf - the buffer returned
2649  *
2650  * This is firmware queue depth limit
2651  *
2652  * A sysfs 'read-only' shost attribute.
2653  */
2654 static ssize_t
2655 _ctl_ioc_reset_count_show(struct device *cdev, struct device_attribute *attr,
2656     char *buf)
2657 {
2658         struct Scsi_Host *shost = class_to_shost(cdev);
2659         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2660
2661         return snprintf(buf, PAGE_SIZE, "%08d\n", ioc->ioc_reset_count);
2662 }
2663 static DEVICE_ATTR(ioc_reset_count, S_IRUGO,
2664     _ctl_ioc_reset_count_show, NULL);
2665
2666 /**
2667  * _ctl_ioc_reply_queue_count_show - number of reply queues
2668  * @cdev - pointer to embedded class device
2669  * @buf - the buffer returned
2670  *
2671  * This is number of reply queues
2672  *
2673  * A sysfs 'read-only' shost attribute.
2674  */
2675 static ssize_t
2676 _ctl_ioc_reply_queue_count_show(struct device *cdev,
2677          struct device_attribute *attr, char *buf)
2678 {
2679         u8 reply_queue_count;
2680         struct Scsi_Host *shost = class_to_shost(cdev);
2681         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2682
2683         if ((ioc->facts.IOCCapabilities &
2684             MPI2_IOCFACTS_CAPABILITY_MSI_X_INDEX) && ioc->msix_enable)
2685                 reply_queue_count = ioc->reply_queue_count;
2686         else
2687                 reply_queue_count = 1;
2688         return snprintf(buf, PAGE_SIZE, "%d\n", reply_queue_count);
2689 }
2690 static DEVICE_ATTR(reply_queue_count, S_IRUGO,
2691          _ctl_ioc_reply_queue_count_show, NULL);
2692
2693 struct DIAG_BUFFER_START {
2694         __le32 Size;
2695         __le32 DiagVersion;
2696         u8 BufferType;
2697         u8 Reserved[3];
2698         __le32 Reserved1;
2699         __le32 Reserved2;
2700         __le32 Reserved3;
2701 };
2702 /**
2703  * _ctl_host_trace_buffer_size_show - host buffer size (trace only)
2704  * @cdev - pointer to embedded class device
2705  * @buf - the buffer returned
2706  *
2707  * A sysfs 'read-only' shost attribute.
2708  */
2709 static ssize_t
2710 _ctl_host_trace_buffer_size_show(struct device *cdev,
2711     struct device_attribute *attr, char *buf)
2712 {
2713         struct Scsi_Host *shost = class_to_shost(cdev);
2714         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2715         u32 size = 0;
2716         struct DIAG_BUFFER_START *request_data;
2717
2718         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2719                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2720                     "registered\n", ioc->name, __func__);
2721                 return 0;
2722         }
2723
2724         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2725             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2726                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2727                     "registered\n", ioc->name, __func__);
2728                 return 0;
2729         }
2730
2731         request_data = (struct DIAG_BUFFER_START *)
2732             ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE];
2733         if ((le32_to_cpu(request_data->DiagVersion) == 0x00000000 ||
2734             le32_to_cpu(request_data->DiagVersion) == 0x01000000) &&
2735             le32_to_cpu(request_data->Reserved3) == 0x4742444c)
2736                 size = le32_to_cpu(request_data->Size);
2737
2738         ioc->ring_buffer_sz = size;
2739         return snprintf(buf, PAGE_SIZE, "%d\n", size);
2740 }
2741 static DEVICE_ATTR(host_trace_buffer_size, S_IRUGO,
2742          _ctl_host_trace_buffer_size_show, NULL);
2743
2744 /**
2745  * _ctl_host_trace_buffer_show - firmware ring buffer (trace only)
2746  * @cdev - pointer to embedded class device
2747  * @buf - the buffer returned
2748  *
2749  * A sysfs 'read/write' shost attribute.
2750  *
2751  * You will only be able to read 4k bytes of ring buffer at a time.
2752  * In order to read beyond 4k bytes, you will have to write out the
2753  * offset to the same attribute, it will move the pointer.
2754  */
2755 static ssize_t
2756 _ctl_host_trace_buffer_show(struct device *cdev, struct device_attribute *attr,
2757      char *buf)
2758 {
2759         struct Scsi_Host *shost = class_to_shost(cdev);
2760         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2761         void *request_data;
2762         u32 size;
2763
2764         if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) {
2765                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2766                     "registered\n", ioc->name, __func__);
2767                 return 0;
2768         }
2769
2770         if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2771             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
2772                 printk(MPT2SAS_ERR_FMT "%s: host_trace_buffer is not "
2773                     "registered\n", ioc->name, __func__);
2774                 return 0;
2775         }
2776
2777         if (ioc->ring_buffer_offset > ioc->ring_buffer_sz)
2778                 return 0;
2779
2780         size = ioc->ring_buffer_sz - ioc->ring_buffer_offset;
2781         size = (size > PAGE_SIZE) ? PAGE_SIZE : size;
2782         request_data = ioc->diag_buffer[0] + ioc->ring_buffer_offset;
2783         memcpy(buf, request_data, size);
2784         return size;
2785 }
2786
2787 static ssize_t
2788 _ctl_host_trace_buffer_store(struct device *cdev, struct device_attribute *attr,
2789     const char *buf, size_t count)
2790 {
2791         struct Scsi_Host *shost = class_to_shost(cdev);
2792         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2793         int val = 0;
2794
2795         if (sscanf(buf, "%d", &val) != 1)
2796                 return -EINVAL;
2797
2798         ioc->ring_buffer_offset = val;
2799         return strlen(buf);
2800 }
2801 static DEVICE_ATTR(host_trace_buffer, S_IRUGO | S_IWUSR,
2802     _ctl_host_trace_buffer_show, _ctl_host_trace_buffer_store);
2803
2804 /*****************************************/
2805
2806 /**
2807  * _ctl_host_trace_buffer_enable_show - firmware ring buffer (trace only)
2808  * @cdev - pointer to embedded class device
2809  * @buf - the buffer returned
2810  *
2811  * A sysfs 'read/write' shost attribute.
2812  *
2813  * This is a mechnism to post/release host_trace_buffers
2814  */
2815 static ssize_t
2816 _ctl_host_trace_buffer_enable_show(struct device *cdev,
2817     struct device_attribute *attr, char *buf)
2818 {
2819         struct Scsi_Host *shost = class_to_shost(cdev);
2820         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2821
2822         if ((!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) ||
2823            ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2824             MPT2_DIAG_BUFFER_IS_REGISTERED) == 0))
2825                 return snprintf(buf, PAGE_SIZE, "off\n");
2826         else if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2827             MPT2_DIAG_BUFFER_IS_RELEASED))
2828                 return snprintf(buf, PAGE_SIZE, "release\n");
2829         else
2830                 return snprintf(buf, PAGE_SIZE, "post\n");
2831 }
2832
2833 static ssize_t
2834 _ctl_host_trace_buffer_enable_store(struct device *cdev,
2835     struct device_attribute *attr, const char *buf, size_t count)
2836 {
2837         struct Scsi_Host *shost = class_to_shost(cdev);
2838         struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
2839         char str[10] = "";
2840         struct mpt2_diag_register diag_register;
2841         u8 issue_reset = 0;
2842
2843         if (sscanf(buf, "%9s", str) != 1)
2844                 return -EINVAL;
2845
2846         if (!strcmp(str, "post")) {
2847                 /* exit out if host buffers are already posted */
2848                 if ((ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE]) &&
2849                     (ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2850                     MPT2_DIAG_BUFFER_IS_REGISTERED) &&
2851                     ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2852                     MPT2_DIAG_BUFFER_IS_RELEASED) == 0))
2853                         goto out;
2854                 memset(&diag_register, 0, sizeof(struct mpt2_diag_register));
2855                 printk(MPT2SAS_INFO_FMT "posting host trace buffers\n",
2856                     ioc->name);
2857                 diag_register.buffer_type = MPI2_DIAG_BUF_TYPE_TRACE;
2858                 diag_register.requested_buffer_size = (1024 * 1024);
2859                 diag_register.unique_id = 0x7075900;
2860                 ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] = 0;
2861                 _ctl_diag_register_2(ioc,  &diag_register);
2862         } else if (!strcmp(str, "release")) {
2863                 /* exit out if host buffers are already released */
2864                 if (!ioc->diag_buffer[MPI2_DIAG_BUF_TYPE_TRACE])
2865                         goto out;
2866                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2867                     MPT2_DIAG_BUFFER_IS_REGISTERED) == 0)
2868                         goto out;
2869                 if ((ioc->diag_buffer_status[MPI2_DIAG_BUF_TYPE_TRACE] &
2870                     MPT2_DIAG_BUFFER_IS_RELEASED))
2871                         goto out;
2872                 printk(MPT2SAS_INFO_FMT "releasing host trace buffer\n",
2873                     ioc->name);
2874                 _ctl_send_release(ioc, MPI2_DIAG_BUF_TYPE_TRACE, &issue_reset);
2875         }
2876
2877  out:
2878         return strlen(buf);
2879 }
2880 static DEVICE_ATTR(host_trace_buffer_enable, S_IRUGO | S_IWUSR,
2881     _ctl_host_trace_buffer_enable_show, _ctl_host_trace_buffer_enable_store);
2882
2883 struct device_attribute *mpt2sas_host_attrs[] = {
2884         &dev_attr_version_fw,
2885         &dev_attr_version_bios,
2886         &dev_attr_version_mpi,
2887         &dev_attr_version_product,
2888         &dev_attr_version_nvdata_persistent,
2889         &dev_attr_version_nvdata_default,
2890         &dev_attr_board_name,
2891         &dev_attr_board_assembly,
2892         &dev_attr_board_tracer,
2893         &dev_attr_io_delay,
2894         &dev_attr_device_delay,
2895         &dev_attr_logging_level,
2896         &dev_attr_fwfault_debug,
2897         &dev_attr_fw_queue_depth,
2898         &dev_attr_host_sas_address,
2899         &dev_attr_ioc_reset_count,
2900         &dev_attr_host_trace_buffer_size,
2901         &dev_attr_host_trace_buffer,
2902         &dev_attr_host_trace_buffer_enable,
2903         &dev_attr_reply_queue_count,
2904         NULL,
2905 };
2906
2907 /**
2908  * _ctl_device_sas_address_show - sas address
2909  * @cdev - pointer to embedded class device
2910  * @buf - the buffer returned
2911  *
2912  * This is the sas address for the target
2913  *
2914  * A sysfs 'read-only' shost attribute.
2915  */
2916 static ssize_t
2917 _ctl_device_sas_address_show(struct device *dev, struct device_attribute *attr,
2918     char *buf)
2919 {
2920         struct scsi_device *sdev = to_scsi_device(dev);
2921         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
2922
2923         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
2924             (unsigned long long)sas_device_priv_data->sas_target->sas_address);
2925 }
2926 static DEVICE_ATTR(sas_address, S_IRUGO, _ctl_device_sas_address_show, NULL);
2927
2928 /**
2929  * _ctl_device_handle_show - device handle
2930  * @cdev - pointer to embedded class device
2931  * @buf - the buffer returned
2932  *
2933  * This is the firmware assigned device handle
2934  *
2935  * A sysfs 'read-only' shost attribute.
2936  */
2937 static ssize_t
2938 _ctl_device_handle_show(struct device *dev, struct device_attribute *attr,
2939     char *buf)
2940 {
2941         struct scsi_device *sdev = to_scsi_device(dev);
2942         struct MPT2SAS_DEVICE *sas_device_priv_data = sdev->hostdata;
2943
2944         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
2945             sas_device_priv_data->sas_target->handle);
2946 }
2947 static DEVICE_ATTR(sas_device_handle, S_IRUGO, _ctl_device_handle_show, NULL);
2948
2949 struct device_attribute *mpt2sas_dev_attrs[] = {
2950         &dev_attr_sas_address,
2951         &dev_attr_sas_device_handle,
2952         NULL,
2953 };
2954
2955 static const struct file_operations ctl_fops = {
2956         .owner = THIS_MODULE,
2957         .unlocked_ioctl = _ctl_ioctl,
2958         .release = _ctl_release,
2959         .poll = _ctl_poll,
2960         .fasync = _ctl_fasync,
2961 #ifdef CONFIG_COMPAT
2962         .compat_ioctl = _ctl_ioctl_compat,
2963 #endif
2964         .llseek = noop_llseek,
2965 };
2966
2967 static struct miscdevice ctl_dev = {
2968         .minor  = MPT2SAS_MINOR,
2969         .name   = MPT2SAS_DEV_NAME,
2970         .fops   = &ctl_fops,
2971 };
2972
2973 /**
2974  * mpt2sas_ctl_init - main entry point for ctl.
2975  *
2976  */
2977 void
2978 mpt2sas_ctl_init(void)
2979 {
2980         async_queue = NULL;
2981         if (misc_register(&ctl_dev) < 0)
2982                 printk(KERN_ERR "%s can't register misc device [minor=%d]\n",
2983                     MPT2SAS_DRIVER_NAME, MPT2SAS_MINOR);
2984
2985         init_waitqueue_head(&ctl_poll_wait);
2986 }
2987
2988 /**
2989  * mpt2sas_ctl_exit - exit point for ctl
2990  *
2991  */
2992 void
2993 mpt2sas_ctl_exit(void)
2994 {
2995         struct MPT2SAS_ADAPTER *ioc;
2996         int i;
2997
2998         list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
2999
3000                 /* free memory associated to diag buffers */
3001                 for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
3002                         if (!ioc->diag_buffer[i])
3003                                 continue;
3004                         pci_free_consistent(ioc->pdev, ioc->diag_buffer_sz[i],
3005                             ioc->diag_buffer[i], ioc->diag_buffer_dma[i]);
3006                         ioc->diag_buffer[i] = NULL;
3007                         ioc->diag_buffer_status[i] = 0;
3008                 }
3009
3010                 kfree(ioc->event_log);
3011         }
3012         misc_deregister(&ctl_dev);
3013 }
3014