drivers/scsi/mpt2sas/mpt2sas_base.c

   1 /*
   2  * This is the Fusion MPT base driver providing common API layer interface
   3  * for access to MPT (Message Passing Technology) firmware.
   4  *
   5  * This code is based on drivers/scsi/mpt2sas/mpt2_base.c
   6  * Copyright (C) 2007-2010  LSI Corporation
   7  *  (mailto:DL-MPTFusionLinux@lsi.com)
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * NO WARRANTY
  20  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  21  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  22  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  23  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  24  * solely responsible for determining the appropriateness of using and
  25  * distributing the Program and assumes all risks associated with its
  26  * exercise of rights under this Agreement, including but not limited to
  27  * the risks and costs of program errors, damage to or loss of data,
  28  * programs or equipment, and unavailability or interruption of operations.
  29
  30  * DISCLAIMER OF LIABILITY
  31  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  32  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  34  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  35  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  36  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  37  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  38
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  42  * USA.
  43  */
  44
  45 #include <linux/version.h>
  46 #include <linux/kernel.h>
  47 #include <linux/module.h>
  48 #include <linux/errno.h>
  49 #include <linux/init.h>
  50 #include <linux/slab.h>
  51 #include <linux/types.h>
  52 #include <linux/pci.h>
  53 #include <linux/kdev_t.h>
  54 #include <linux/blkdev.h>
  55 #include <linux/delay.h>
  56 #include <linux/interrupt.h>
  57 #include <linux/dma-mapping.h>
  58 #include <linux/sort.h>
  59 #include <linux/io.h>
  60 #include <linux/time.h>
  61 #include <linux/aer.h>
  62
  63 #include "mpt2sas_base.h"
  64
  65 static MPT_CALLBACK     mpt_callbacks[MPT_MAX_CALLBACKS];
  66
  67 #define FAULT_POLLING_INTERVAL 1000 /* in milliseconds */
  68 #define MPT2SAS_MAX_REQUEST_QUEUE 600 /* maximum controller queue depth */
  69
  70 static int max_queue_depth = -1;
  71 module_param(max_queue_depth, int, 0);
  72 MODULE_PARM_DESC(max_queue_depth, " max controller queue depth ");
  73
  74 static int max_sgl_entries = -1;
  75 module_param(max_sgl_entries, int, 0);
  76 MODULE_PARM_DESC(max_sgl_entries, " max sg entries ");
  77
  78 static int msix_disable = -1;
  79 module_param(msix_disable, int, 0);
  80 MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
  81
  82 /* diag_buffer_enable is bitwise
  83  * bit 0 set = TRACE
  84  * bit 1 set = SNAPSHOT
  85  * bit 2 set = EXTENDED
  86  *
  87  * Either bit can be set, or both
  88  */
  89 static int diag_buffer_enable;
  90 module_param(diag_buffer_enable, int, 0);
  91 MODULE_PARM_DESC(diag_buffer_enable, " post diag buffers "
  92     "(TRACE=1/SNAPSHOT=2/EXTENDED=4/default=0)");
  93
  94 int mpt2sas_fwfault_debug;
  95 MODULE_PARM_DESC(mpt2sas_fwfault_debug, " enable detection of firmware fault "
  96     "and halt firmware - (default=0)");
  97
  98 static int disable_discovery = -1;
  99 module_param(disable_discovery, int, 0);
 100 MODULE_PARM_DESC(disable_discovery, " disable discovery ");
 101
 102 /**
 103  * _scsih_set_fwfault_debug - global setting of ioc->fwfault_debug.
 104  *
 105  */
 106 static int
 107 _scsih_set_fwfault_debug(const char *val, struct kernel_param *kp)
 108 {
 109         int ret = param_set_int(val, kp);
 110         struct MPT2SAS_ADAPTER *ioc;
 111
 112         if (ret)
 113                 return ret;
 114
 115         printk(KERN_INFO "setting fwfault_debug(%d)\n", mpt2sas_fwfault_debug);
 116         list_for_each_entry(ioc, &mpt2sas_ioc_list, list)
 117                 ioc->fwfault_debug = mpt2sas_fwfault_debug;
 118         return 0;
 119 }
 120 module_param_call(mpt2sas_fwfault_debug, _scsih_set_fwfault_debug,
 121     param_get_int, &mpt2sas_fwfault_debug, 0644);
 122
 123 /**
 124  * _base_fault_reset_work - workq handling ioc fault conditions
 125  * @work: input argument, used to derive ioc
 126  * Context: sleep.
 127  *
 128  * Return nothing.
 129  */
 130 static void
 131 _base_fault_reset_work(struct work_struct *work)
 132 {
 133         struct MPT2SAS_ADAPTER *ioc =
 134             container_of(work, struct MPT2SAS_ADAPTER, fault_reset_work.work);
 135         unsigned long    flags;
 136         u32 doorbell;
 137         int rc;
 138
 139         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 140         if (ioc->shost_recovery)
 141                 goto rearm_timer;
 142         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 143
 144         doorbell = mpt2sas_base_get_iocstate(ioc, 0);
 145         if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
 146                 rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 147                     FORCE_BIG_HAMMER);
 148                 printk(MPT2SAS_WARN_FMT "%s: hard reset: %s\n", ioc->name,
 149                     __func__, (rc == 0) ? "success" : "failed");
 150                 doorbell = mpt2sas_base_get_iocstate(ioc, 0);
 151                 if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT)
 152                         mpt2sas_base_fault_info(ioc, doorbell &
 153                             MPI2_DOORBELL_DATA_MASK);
 154         }
 155
 156         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 157  rearm_timer:
 158         if (ioc->fault_reset_work_q)
 159                 queue_delayed_work(ioc->fault_reset_work_q,
 160                     &ioc->fault_reset_work,
 161                     msecs_to_jiffies(FAULT_POLLING_INTERVAL));
 162         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 163 }
 164
 165 /**
 166  * mpt2sas_base_start_watchdog - start the fault_reset_work_q
 167  * @ioc: per adapter object
 168  * Context: sleep.
 169  *
 170  * Return nothing.
 171  */
 172 void
 173 mpt2sas_base_start_watchdog(struct MPT2SAS_ADAPTER *ioc)
 174 {
 175         unsigned long    flags;
 176
 177         if (ioc->fault_reset_work_q)
 178                 return;
 179
 180         /* initialize fault polling */
 181         INIT_DELAYED_WORK(&ioc->fault_reset_work, _base_fault_reset_work);
 182         snprintf(ioc->fault_reset_work_q_name,
 183             sizeof(ioc->fault_reset_work_q_name), "poll_%d_status", ioc->id);
 184         ioc->fault_reset_work_q =
 185                 create_singlethread_workqueue(ioc->fault_reset_work_q_name);
 186         if (!ioc->fault_reset_work_q) {
 187                 printk(MPT2SAS_ERR_FMT "%s: failed (line=%d)\n",
 188                     ioc->name, __func__, __LINE__);
 189                         return;
 190         }
 191         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 192         if (ioc->fault_reset_work_q)
 193                 queue_delayed_work(ioc->fault_reset_work_q,
 194                     &ioc->fault_reset_work,
 195                     msecs_to_jiffies(FAULT_POLLING_INTERVAL));
 196         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 197 }
 198
 199 /**
 200  * mpt2sas_base_stop_watchdog - stop the fault_reset_work_q
 201  * @ioc: per adapter object
 202  * Context: sleep.
 203  *
 204  * Return nothing.
 205  */
 206 void
 207 mpt2sas_base_stop_watchdog(struct MPT2SAS_ADAPTER *ioc)
 208 {
 209         unsigned long    flags;
 210         struct workqueue_struct *wq;
 211
 212         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 213         wq = ioc->fault_reset_work_q;
 214         ioc->fault_reset_work_q = NULL;
 215         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 216         if (wq) {
 217                 if (!cancel_delayed_work(&ioc->fault_reset_work))
 218                         flush_workqueue(wq);
 219                 destroy_workqueue(wq);
 220         }
 221 }
 222
 223 /**
 224  * mpt2sas_base_fault_info - verbose translation of firmware FAULT code
 225  * @ioc: per adapter object
 226  * @fault_code: fault code
 227  *
 228  * Return nothing.
 229  */
 230 void
 231 mpt2sas_base_fault_info(struct MPT2SAS_ADAPTER *ioc , u16 fault_code)
 232 {
 233         printk(MPT2SAS_ERR_FMT "fault_state(0x%04x)!\n",
 234             ioc->name, fault_code);
 235 }
 236
 237 /**
 238  * mpt2sas_halt_firmware - halt's mpt controller firmware
 239  * @ioc: per adapter object
 240  *
 241  * For debugging timeout related issues.  Writing 0xCOFFEE00
 242  * to the doorbell register will halt controller firmware. With
 243  * the purpose to stop both driver and firmware, the enduser can
 244  * obtain a ring buffer from controller UART.
 245  */
 246 void
 247 mpt2sas_halt_firmware(struct MPT2SAS_ADAPTER *ioc)
 248 {
 249         u32 doorbell;
 250
 251         if (!ioc->fwfault_debug)
 252                 return;
 253
 254         dump_stack();
 255
 256         doorbell = readl(&ioc->chip->Doorbell);
 257         if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT)
 258                 mpt2sas_base_fault_info(ioc , doorbell);
 259         else {
 260                 writel(0xC0FFEE00, &ioc->chip->Doorbell);
 261                 printk(MPT2SAS_ERR_FMT "Firmware is halted due to command "
 262                     "timeout\n", ioc->name);
 263         }
 264
 265         panic("panic in %s\n", __func__);
 266 }
 267
 268 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 269 /**
 270  * _base_sas_ioc_info - verbose translation of the ioc status
 271  * @ioc: per adapter object
 272  * @mpi_reply: reply mf payload returned from firmware
 273  * @request_hdr: request mf
 274  *
 275  * Return nothing.
 276  */
 277 static void
 278 _base_sas_ioc_info(struct MPT2SAS_ADAPTER *ioc, MPI2DefaultReply_t *mpi_reply,
 279      MPI2RequestHeader_t *request_hdr)
 280 {
 281         u16 ioc_status = le16_to_cpu(mpi_reply->IOCStatus) &
 282             MPI2_IOCSTATUS_MASK;
 283         char *desc = NULL;
 284         u16 frame_sz;
 285         char *func_str = NULL;
 286
 287         /* SCSI_IO, RAID_PASS are handled from _scsih_scsi_ioc_info */
 288         if (request_hdr->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 289             request_hdr->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 290             request_hdr->Function == MPI2_FUNCTION_EVENT_NOTIFICATION)
 291                 return;
 292
 293         if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
 294                 return;
 295
 296         switch (ioc_status) {
 297
 298 /****************************************************************************
 299 *  Common IOCStatus values for all replies
 300 ****************************************************************************/
 301
 302         case MPI2_IOCSTATUS_INVALID_FUNCTION:
 303                 desc = "invalid function";
 304                 break;
 305         case MPI2_IOCSTATUS_BUSY:
 306                 desc = "busy";
 307                 break;
 308         case MPI2_IOCSTATUS_INVALID_SGL:
 309                 desc = "invalid sgl";
 310                 break;
 311         case MPI2_IOCSTATUS_INTERNAL_ERROR:
 312                 desc = "internal error";
 313                 break;
 314         case MPI2_IOCSTATUS_INVALID_VPID:
 315                 desc = "invalid vpid";
 316                 break;
 317         case MPI2_IOCSTATUS_INSUFFICIENT_RESOURCES:
 318                 desc = "insufficient resources";
 319                 break;
 320         case MPI2_IOCSTATUS_INVALID_FIELD:
 321                 desc = "invalid field";
 322                 break;
 323         case MPI2_IOCSTATUS_INVALID_STATE:
 324                 desc = "invalid state";
 325                 break;
 326         case MPI2_IOCSTATUS_OP_STATE_NOT_SUPPORTED:
 327                 desc = "op state not supported";
 328                 break;
 329
 330 /****************************************************************************
 331 *  Config IOCStatus values
 332 ****************************************************************************/
 333
 334         case MPI2_IOCSTATUS_CONFIG_INVALID_ACTION:
 335                 desc = "config invalid action";
 336                 break;
 337         case MPI2_IOCSTATUS_CONFIG_INVALID_TYPE:
 338                 desc = "config invalid type";
 339                 break;
 340         case MPI2_IOCSTATUS_CONFIG_INVALID_PAGE:
 341                 desc = "config invalid page";
 342                 break;
 343         case MPI2_IOCSTATUS_CONFIG_INVALID_DATA:
 344                 desc = "config invalid data";
 345                 break;
 346         case MPI2_IOCSTATUS_CONFIG_NO_DEFAULTS:
 347                 desc = "config no defaults";
 348                 break;
 349         case MPI2_IOCSTATUS_CONFIG_CANT_COMMIT:
 350                 desc = "config cant commit";
 351                 break;
 352
 353 /****************************************************************************
 354 *  SCSI IO Reply
 355 ****************************************************************************/
 356
 357         case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
 358         case MPI2_IOCSTATUS_SCSI_INVALID_DEVHANDLE:
 359         case MPI2_IOCSTATUS_SCSI_DEVICE_NOT_THERE:
 360         case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
 361         case MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN:
 362         case MPI2_IOCSTATUS_SCSI_IO_DATA_ERROR:
 363         case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
 364         case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED:
 365         case MPI2_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:
 366         case MPI2_IOCSTATUS_SCSI_TASK_MGMT_FAILED:
 367         case MPI2_IOCSTATUS_SCSI_IOC_TERMINATED:
 368         case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:
 369                 break;
 370
 371 /****************************************************************************
 372 *  For use by SCSI Initiator and SCSI Target end-to-end data protection
 373 ****************************************************************************/
 374
 375         case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
 376                 desc = "eedp guard error";
 377                 break;
 378         case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
 379                 desc = "eedp ref tag error";
 380                 break;
 381         case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
 382                 desc = "eedp app tag error";
 383                 break;
 384
 385 /****************************************************************************
 386 *  SCSI Target values
 387 ****************************************************************************/
 388
 389         case MPI2_IOCSTATUS_TARGET_INVALID_IO_INDEX:
 390                 desc = "target invalid io index";
 391                 break;
 392         case MPI2_IOCSTATUS_TARGET_ABORTED:
 393                 desc = "target aborted";
 394                 break;
 395         case MPI2_IOCSTATUS_TARGET_NO_CONN_RETRYABLE:
 396                 desc = "target no conn retryable";
 397                 break;
 398         case MPI2_IOCSTATUS_TARGET_NO_CONNECTION:
 399                 desc = "target no connection";
 400                 break;
 401         case MPI2_IOCSTATUS_TARGET_XFER_COUNT_MISMATCH:
 402                 desc = "target xfer count mismatch";
 403                 break;
 404         case MPI2_IOCSTATUS_TARGET_DATA_OFFSET_ERROR:
 405                 desc = "target data offset error";
 406                 break;
 407         case MPI2_IOCSTATUS_TARGET_TOO_MUCH_WRITE_DATA:
 408                 desc = "target too much write data";
 409                 break;
 410         case MPI2_IOCSTATUS_TARGET_IU_TOO_SHORT:
 411                 desc = "target iu too short";
 412                 break;
 413         case MPI2_IOCSTATUS_TARGET_ACK_NAK_TIMEOUT:
 414                 desc = "target ack nak timeout";
 415                 break;
 416         case MPI2_IOCSTATUS_TARGET_NAK_RECEIVED:
 417                 desc = "target nak received";
 418                 break;
 419
 420 /****************************************************************************
 421 *  Serial Attached SCSI values
 422 ****************************************************************************/
 423
 424         case MPI2_IOCSTATUS_SAS_SMP_REQUEST_FAILED:
 425                 desc = "smp request failed";
 426                 break;
 427         case MPI2_IOCSTATUS_SAS_SMP_DATA_OVERRUN:
 428                 desc = "smp data overrun";
 429                 break;
 430
 431 /****************************************************************************
 432 *  Diagnostic Buffer Post / Diagnostic Release values
 433 ****************************************************************************/
 434
 435         case MPI2_IOCSTATUS_DIAGNOSTIC_RELEASED:
 436                 desc = "diagnostic released";
 437                 break;
 438         default:
 439                 break;
 440         }
 441
 442         if (!desc)
 443                 return;
 444
 445         switch (request_hdr->Function) {
 446         case MPI2_FUNCTION_CONFIG:
 447                 frame_sz = sizeof(Mpi2ConfigRequest_t) + ioc->sge_size;
 448                 func_str = "config_page";
 449                 break;
 450         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 451                 frame_sz = sizeof(Mpi2SCSITaskManagementRequest_t);
 452                 func_str = "task_mgmt";
 453                 break;
 454         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 455                 frame_sz = sizeof(Mpi2SasIoUnitControlRequest_t);
 456                 func_str = "sas_iounit_ctl";
 457                 break;
 458         case MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR:
 459                 frame_sz = sizeof(Mpi2SepRequest_t);
 460                 func_str = "enclosure";
 461                 break;
 462         case MPI2_FUNCTION_IOC_INIT:
 463                 frame_sz = sizeof(Mpi2IOCInitRequest_t);
 464                 func_str = "ioc_init";
 465                 break;
 466         case MPI2_FUNCTION_PORT_ENABLE:
 467                 frame_sz = sizeof(Mpi2PortEnableRequest_t);
 468                 func_str = "port_enable";
 469                 break;
 470         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 471                 frame_sz = sizeof(Mpi2SmpPassthroughRequest_t) + ioc->sge_size;
 472                 func_str = "smp_passthru";
 473                 break;
 474         default:
 475                 frame_sz = 32;
 476                 func_str = "unknown";
 477                 break;
 478         }
 479
 480         printk(MPT2SAS_WARN_FMT "ioc_status: %s(0x%04x), request(0x%p),"
 481             " (%s)\n", ioc->name, desc, ioc_status, request_hdr, func_str);
 482
 483         _debug_dump_mf(request_hdr, frame_sz/4);
 484 }
 485
 486 /**
 487  * _base_display_event_data - verbose translation of firmware asyn events
 488  * @ioc: per adapter object
 489  * @mpi_reply: reply mf payload returned from firmware
 490  *
 491  * Return nothing.
 492  */
 493 static void
 494 _base_display_event_data(struct MPT2SAS_ADAPTER *ioc,
 495     Mpi2EventNotificationReply_t *mpi_reply)
 496 {
 497         char *desc = NULL;
 498         u16 event;
 499
 500         if (!(ioc->logging_level & MPT_DEBUG_EVENTS))
 501                 return;
 502
 503         event = le16_to_cpu(mpi_reply->Event);
 504
 505         switch (event) {
 506         case MPI2_EVENT_LOG_DATA:
 507                 desc = "Log Data";
 508                 break;
 509         case MPI2_EVENT_STATE_CHANGE:
 510                 desc = "Status Change";
 511                 break;
 512         case MPI2_EVENT_HARD_RESET_RECEIVED:
 513                 desc = "Hard Reset Received";
 514                 break;
 515         case MPI2_EVENT_EVENT_CHANGE:
 516                 desc = "Event Change";
 517                 break;
 518         case MPI2_EVENT_TASK_SET_FULL:
 519                 desc = "Task Set Full";
 520                 break;
 521         case MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE:
 522                 desc = "Device Status Change";
 523                 break;
 524         case MPI2_EVENT_IR_OPERATION_STATUS:
 525                 desc = "IR Operation Status";
 526                 break;
 527         case MPI2_EVENT_SAS_DISCOVERY:
 528         {
 529                 Mpi2EventDataSasDiscovery_t *event_data =
 530                     (Mpi2EventDataSasDiscovery_t *)mpi_reply->EventData;
 531                 printk(MPT2SAS_INFO_FMT "Discovery: (%s)", ioc->name,
 532                     (event_data->ReasonCode == MPI2_EVENT_SAS_DISC_RC_STARTED) ?
 533                     "start" : "stop");
 534                 if (event_data->DiscoveryStatus)
 535                         printk("discovery_status(0x%08x)",
 536                             le32_to_cpu(event_data->DiscoveryStatus));
 537                 printk("\n");
 538                 return;
 539         }
 540         case MPI2_EVENT_SAS_BROADCAST_PRIMITIVE:
 541                 desc = "SAS Broadcast Primitive";
 542                 break;
 543         case MPI2_EVENT_SAS_INIT_DEVICE_STATUS_CHANGE:
 544                 desc = "SAS Init Device Status Change";
 545                 break;
 546         case MPI2_EVENT_SAS_INIT_TABLE_OVERFLOW:
 547                 desc = "SAS Init Table Overflow";
 548                 break;
 549         case MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
 550                 desc = "SAS Topology Change List";
 551                 break;
 552         case MPI2_EVENT_SAS_ENCL_DEVICE_STATUS_CHANGE:
 553                 desc = "SAS Enclosure Device Status Change";
 554                 break;
 555         case MPI2_EVENT_IR_VOLUME:
 556                 desc = "IR Volume";
 557                 break;
 558         case MPI2_EVENT_IR_PHYSICAL_DISK:
 559                 desc = "IR Physical Disk";
 560                 break;
 561         case MPI2_EVENT_IR_CONFIGURATION_CHANGE_LIST:
 562                 desc = "IR Configuration Change List";
 563                 break;
 564         case MPI2_EVENT_LOG_ENTRY_ADDED:
 565                 desc = "Log Entry Added";
 566                 break;
 567         }
 568
 569         if (!desc)
 570                 return;
 571
 572         printk(MPT2SAS_INFO_FMT "%s\n", ioc->name, desc);
 573 }
 574 #endif
 575
 576 /**
 577  * _base_sas_log_info - verbose translation of firmware log info
 578  * @ioc: per adapter object
 579  * @log_info: log info
 580  *
 581  * Return nothing.
 582  */
 583 static void
 584 _base_sas_log_info(struct MPT2SAS_ADAPTER *ioc , u32 log_info)
 585 {
 586         union loginfo_type {
 587                 u32     loginfo;
 588                 struct {
 589                         u32     subcode:16;
 590                         u32     code:8;
 591                         u32     originator:4;
 592                         u32     bus_type:4;
 593                 } dw;
 594         };
 595         union loginfo_type sas_loginfo;
 596         char *originator_str = NULL;
 597
 598         sas_loginfo.loginfo = log_info;
 599         if (sas_loginfo.dw.bus_type != 3 /*SAS*/)
 600                 return;
 601
 602         /* each nexus loss loginfo */
 603         if (log_info == 0x31170000)
 604                 return;
 605
 606         /* eat the loginfos associated with task aborts */
 607         if (ioc->ignore_loginfos && (log_info == 30050000 || log_info ==
 608             0x31140000 || log_info == 0x31130000))
 609                 return;
 610
 611         switch (sas_loginfo.dw.originator) {
 612         case 0:
 613                 originator_str = "IOP";
 614                 break;
 615         case 1:
 616                 originator_str = "PL";
 617                 break;
 618         case 2:
 619                 originator_str = "IR";
 620                 break;
 621         }
 622
 623         printk(MPT2SAS_WARN_FMT "log_info(0x%08x): originator(%s), "
 624             "code(0x%02x), sub_code(0x%04x)\n", ioc->name, log_info,
 625              originator_str, sas_loginfo.dw.code,
 626              sas_loginfo.dw.subcode);
 627 }
 628
 629 /**
 630  * _base_display_reply_info -
 631  * @ioc: per adapter object
 632  * @smid: system request message index
 633  * @msix_index: MSIX table index supplied by the OS
 634  * @reply: reply message frame(lower 32bit addr)
 635  *
 636  * Return nothing.
 637  */
 638 static void
 639 _base_display_reply_info(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 640     u32 reply)
 641 {
 642         MPI2DefaultReply_t *mpi_reply;
 643         u16 ioc_status;
 644
 645         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 646         ioc_status = le16_to_cpu(mpi_reply->IOCStatus);
 647 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 648         if ((ioc_status & MPI2_IOCSTATUS_MASK) &&
 649             (ioc->logging_level & MPT_DEBUG_REPLY)) {
 650                 _base_sas_ioc_info(ioc , mpi_reply,
 651                    mpt2sas_base_get_msg_frame(ioc, smid));
 652         }
 653 #endif
 654         if (ioc_status & MPI2_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE)
 655                 _base_sas_log_info(ioc, le32_to_cpu(mpi_reply->IOCLogInfo));
 656 }
 657
 658 /**
 659  * mpt2sas_base_done - base internal command completion routine
 660  * @ioc: per adapter object
 661  * @smid: system request message index
 662  * @msix_index: MSIX table index supplied by the OS
 663  * @reply: reply message frame(lower 32bit addr)
 664  *
 665  * Return 1 meaning mf should be freed from _base_interrupt
 666  *        0 means the mf is freed from this function.
 667  */
 668 u8
 669 mpt2sas_base_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
 670     u32 reply)
 671 {
 672         MPI2DefaultReply_t *mpi_reply;
 673
 674         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 675         if (mpi_reply && mpi_reply->Function == MPI2_FUNCTION_EVENT_ACK)
 676                 return 1;
 677
 678         if (ioc->base_cmds.status == MPT2_CMD_NOT_USED)
 679                 return 1;
 680
 681         ioc->base_cmds.status |= MPT2_CMD_COMPLETE;
 682         if (mpi_reply) {
 683                 ioc->base_cmds.status |= MPT2_CMD_REPLY_VALID;
 684                 memcpy(ioc->base_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 685         }
 686         ioc->base_cmds.status &= ~MPT2_CMD_PENDING;
 687         complete(&ioc->base_cmds.done);
 688         return 1;
 689 }
 690
 691 /**
 692  * _base_async_event - main callback handler for firmware asyn events
 693  * @ioc: per adapter object
 694  * @msix_index: MSIX table index supplied by the OS
 695  * @reply: reply message frame(lower 32bit addr)
 696  *
 697  * Return 1 meaning mf should be freed from _base_interrupt
 698  *        0 means the mf is freed from this function.
 699  */
 700 static u8
 701 _base_async_event(struct MPT2SAS_ADAPTER *ioc, u8 msix_index, u32 reply)
 702 {
 703         Mpi2EventNotificationReply_t *mpi_reply;
 704         Mpi2EventAckRequest_t *ack_request;
 705         u16 smid;
 706
 707         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 708         if (!mpi_reply)
 709                 return 1;
 710         if (mpi_reply->Function != MPI2_FUNCTION_EVENT_NOTIFICATION)
 711                 return 1;
 712 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 713         _base_display_event_data(ioc, mpi_reply);
 714 #endif
 715         if (!(mpi_reply->AckRequired & MPI2_EVENT_NOTIFICATION_ACK_REQUIRED))
 716                 goto out;
 717         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
 718         if (!smid) {
 719                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 720                     ioc->name, __func__);
 721                 goto out;
 722         }
 723
 724         ack_request = mpt2sas_base_get_msg_frame(ioc, smid);
 725         memset(ack_request, 0, sizeof(Mpi2EventAckRequest_t));
 726         ack_request->Function = MPI2_FUNCTION_EVENT_ACK;
 727         ack_request->Event = mpi_reply->Event;
 728         ack_request->EventContext = mpi_reply->EventContext;
 729         ack_request->VF_ID = 0;  /* TODO */
 730         ack_request->VP_ID = 0;
 731         mpt2sas_base_put_smid_default(ioc, smid);
 732
 733  out:
 734
 735         /* scsih callback handler */
 736         mpt2sas_scsih_event_callback(ioc, msix_index, reply);
 737
 738         /* ctl callback handler */
 739         mpt2sas_ctl_event_callback(ioc, msix_index, reply);
 740
 741         return 1;
 742 }
 743
 744 /**
 745  * _base_get_cb_idx - obtain the callback index
 746  * @ioc: per adapter object
 747  * @smid: system request message index
 748  *
 749  * Return callback index.
 750  */
 751 static u8
 752 _base_get_cb_idx(struct MPT2SAS_ADAPTER *ioc, u16 smid)
 753 {
 754         int i;
 755         u8 cb_idx = 0xFF;
 756
 757         if (smid >= ioc->hi_priority_smid) {
 758                 if (smid < ioc->internal_smid) {
 759                         i = smid - ioc->hi_priority_smid;
 760                         cb_idx = ioc->hpr_lookup[i].cb_idx;
 761                 } else {
 762                         i = smid - ioc->internal_smid;
 763                         cb_idx = ioc->internal_lookup[i].cb_idx;
 764                 }
 765         } else {
 766                 i = smid - 1;
 767                 cb_idx = ioc->scsi_lookup[i].cb_idx;
 768         }
 769         return cb_idx;
 770 }
 771
 772 /**
 773  * _base_mask_interrupts - disable interrupts
 774  * @ioc: per adapter object
 775  *
 776  * Disabling ResetIRQ, Reply and Doorbell Interrupts
 777  *
 778  * Return nothing.
 779  */
 780 static void
 781 _base_mask_interrupts(struct MPT2SAS_ADAPTER *ioc)
 782 {
 783         u32 him_register;
 784
 785         ioc->mask_interrupts = 1;
 786         him_register = readl(&ioc->chip->HostInterruptMask);
 787         him_register |= MPI2_HIM_DIM + MPI2_HIM_RIM + MPI2_HIM_RESET_IRQ_MASK;
 788         writel(him_register, &ioc->chip->HostInterruptMask);
 789         readl(&ioc->chip->HostInterruptMask);
 790 }
 791
 792 /**
 793  * _base_unmask_interrupts - enable interrupts
 794  * @ioc: per adapter object
 795  *
 796  * Enabling only Reply Interrupts
 797  *
 798  * Return nothing.
 799  */
 800 static void
 801 _base_unmask_interrupts(struct MPT2SAS_ADAPTER *ioc)
 802 {
 803         u32 him_register;
 804
 805         him_register = readl(&ioc->chip->HostInterruptMask);
 806         him_register &= ~MPI2_HIM_RIM;
 807         writel(him_register, &ioc->chip->HostInterruptMask);
 808         ioc->mask_interrupts = 0;
 809 }
 810
 811 union reply_descriptor {
 812         u64 word;
 813         struct {
 814                 u32 low;
 815                 u32 high;
 816         } u;
 817 };
 818
 819 /**
 820  * _base_interrupt - MPT adapter (IOC) specific interrupt handler.
 821  * @irq: irq number (not used)
 822  * @bus_id: bus identifier cookie == pointer to MPT_ADAPTER structure
 823  * @r: pt_regs pointer (not used)
 824  *
 825  * Return IRQ_HANDLE if processed, else IRQ_NONE.
 826  */
 827 static irqreturn_t
 828 _base_interrupt(int irq, void *bus_id)
 829 {
 830         union reply_descriptor rd;
 831         u32 completed_cmds;
 832         u8 request_desript_type;
 833         u16 smid;
 834         u8 cb_idx;
 835         u32 reply;
 836         u8 msix_index;
 837         struct MPT2SAS_ADAPTER *ioc = bus_id;
 838         Mpi2ReplyDescriptorsUnion_t *rpf;
 839         u8 rc;
 840
 841         if (ioc->mask_interrupts)
 842                 return IRQ_NONE;
 843
 844         rpf = &ioc->reply_post_free[ioc->reply_post_host_index];
 845         request_desript_type = rpf->Default.ReplyFlags
 846              & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 847         if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
 848                 return IRQ_NONE;
 849
 850         completed_cmds = 0;
 851         do {
 852                 rd.word = rpf->Words;
 853                 if (rd.u.low == UINT_MAX || rd.u.high == UINT_MAX)
 854                         goto out;
 855                 reply = 0;
 856                 cb_idx = 0xFF;
 857                 smid = le16_to_cpu(rpf->Default.DescriptorTypeDependent1);
 858                 msix_index = rpf->Default.MSIxIndex;
 859                 if (request_desript_type ==
 860                     MPI2_RPY_DESCRIPT_FLAGS_ADDRESS_REPLY) {
 861                         reply = le32_to_cpu
 862                                 (rpf->AddressReply.ReplyFrameAddress);
 863                 } else if (request_desript_type ==
 864                     MPI2_RPY_DESCRIPT_FLAGS_TARGET_COMMAND_BUFFER)
 865                         goto next;
 866                 else if (request_desript_type ==
 867                     MPI2_RPY_DESCRIPT_FLAGS_TARGETASSIST_SUCCESS)
 868                         goto next;
 869                 if (smid)
 870                         cb_idx = _base_get_cb_idx(ioc, smid);
 871                 if (smid && cb_idx != 0xFF) {
 872                         rc = mpt_callbacks[cb_idx](ioc, smid, msix_index,
 873                             reply);
 874                         if (reply)
 875                                 _base_display_reply_info(ioc, smid, msix_index,
 876                                     reply);
 877                         if (rc)
 878                                 mpt2sas_base_free_smid(ioc, smid);
 879                 }
 880                 if (!smid)
 881                         _base_async_event(ioc, msix_index, reply);
 882
 883                 /* reply free queue handling */
 884                 if (reply) {
 885                         ioc->reply_free_host_index =
 886                             (ioc->reply_free_host_index ==
 887                             (ioc->reply_free_queue_depth - 1)) ?
 888                             0 : ioc->reply_free_host_index + 1;
 889                         ioc->reply_free[ioc->reply_free_host_index] =
 890                             cpu_to_le32(reply);
 891                         wmb();
 892                         writel(ioc->reply_free_host_index,
 893                             &ioc->chip->ReplyFreeHostIndex);
 894                 }
 895
 896  next:
 897
 898                 rpf->Words = ULLONG_MAX;
 899                 ioc->reply_post_host_index = (ioc->reply_post_host_index ==
 900                     (ioc->reply_post_queue_depth - 1)) ? 0 :
 901                     ioc->reply_post_host_index + 1;
 902                 request_desript_type =
 903                     ioc->reply_post_free[ioc->reply_post_host_index].Default.
 904                     ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 905                 completed_cmds++;
 906                 if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
 907                         goto out;
 908                 if (!ioc->reply_post_host_index)
 909                         rpf = ioc->reply_post_free;
 910                 else
 911                         rpf++;
 912         } while (1);
 913
 914  out:
 915
 916         if (!completed_cmds)
 917                 return IRQ_NONE;
 918
 919         wmb();
 920         writel(ioc->reply_post_host_index, &ioc->chip->ReplyPostHostIndex);
 921         return IRQ_HANDLED;
 922 }
 923
 924 /**
 925  * mpt2sas_base_release_callback_handler - clear interupt callback handler
 926  * @cb_idx: callback index
 927  *
 928  * Return nothing.
 929  */
 930 void
 931 mpt2sas_base_release_callback_handler(u8 cb_idx)
 932 {
 933         mpt_callbacks[cb_idx] = NULL;
 934 }
 935
 936 /**
 937  * mpt2sas_base_register_callback_handler - obtain index for the interrupt callback handler
 938  * @cb_func: callback function
 939  *
 940  * Returns cb_func.
 941  */
 942 u8
 943 mpt2sas_base_register_callback_handler(MPT_CALLBACK cb_func)
 944 {
 945         u8 cb_idx;
 946
 947         for (cb_idx = MPT_MAX_CALLBACKS-1; cb_idx; cb_idx--)
 948                 if (mpt_callbacks[cb_idx] == NULL)
 949                         break;
 950
 951         mpt_callbacks[cb_idx] = cb_func;
 952         return cb_idx;
 953 }
 954
 955 /**
 956  * mpt2sas_base_initialize_callback_handler - initialize the interrupt callback handler
 957  *
 958  * Return nothing.
 959  */
 960 void
 961 mpt2sas_base_initialize_callback_handler(void)
 962 {
 963         u8 cb_idx;
 964
 965         for (cb_idx = 0; cb_idx < MPT_MAX_CALLBACKS; cb_idx++)
 966                 mpt2sas_base_release_callback_handler(cb_idx);
 967 }
 968
 969 /**
 970  * mpt2sas_base_build_zero_len_sge - build zero length sg entry
 971  * @ioc: per adapter object
 972  * @paddr: virtual address for SGE
 973  *
 974  * Create a zero length scatter gather entry to insure the IOCs hardware has
 975  * something to use if the target device goes brain dead and tries
 976  * to send data even when none is asked for.
 977  *
 978  * Return nothing.
 979  */
 980 void
 981 mpt2sas_base_build_zero_len_sge(struct MPT2SAS_ADAPTER *ioc, void *paddr)
 982 {
 983         u32 flags_length = (u32)((MPI2_SGE_FLAGS_LAST_ELEMENT |
 984             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_END_OF_LIST |
 985             MPI2_SGE_FLAGS_SIMPLE_ELEMENT) <<
 986             MPI2_SGE_FLAGS_SHIFT);
 987         ioc->base_add_sg_single(paddr, flags_length, -1);
 988 }
 989
 990 /**
 991  * _base_add_sg_single_32 - Place a simple 32 bit SGE at address pAddr.
 992  * @paddr: virtual address for SGE
 993  * @flags_length: SGE flags and data transfer length
 994  * @dma_addr: Physical address
 995  *
 996  * Return nothing.
 997  */
 998 static void
 999 _base_add_sg_single_32(void *paddr, u32 flags_length, dma_addr_t dma_addr)
1000 {
1001         Mpi2SGESimple32_t *sgel = paddr;
1002
1003         flags_length |= (MPI2_SGE_FLAGS_32_BIT_ADDRESSING |
1004             MPI2_SGE_FLAGS_SYSTEM_ADDRESS) << MPI2_SGE_FLAGS_SHIFT;
1005         sgel->FlagsLength = cpu_to_le32(flags_length);
1006         sgel->Address = cpu_to_le32(dma_addr);
1007 }
1008
1009
1010 /**
1011  * _base_add_sg_single_64 - Place a simple 64 bit SGE at address pAddr.
1012  * @paddr: virtual address for SGE
1013  * @flags_length: SGE flags and data transfer length
1014  * @dma_addr: Physical address
1015  *
1016  * Return nothing.
1017  */
1018 static void
1019 _base_add_sg_single_64(void *paddr, u32 flags_length, dma_addr_t dma_addr)
1020 {
1021         Mpi2SGESimple64_t *sgel = paddr;
1022
1023         flags_length |= (MPI2_SGE_FLAGS_64_BIT_ADDRESSING |
1024             MPI2_SGE_FLAGS_SYSTEM_ADDRESS) << MPI2_SGE_FLAGS_SHIFT;
1025         sgel->FlagsLength = cpu_to_le32(flags_length);
1026         sgel->Address = cpu_to_le64(dma_addr);
1027 }
1028
1029 #define convert_to_kb(x) ((x) << (PAGE_SHIFT - 10))
1030
1031 /**
1032  * _base_config_dma_addressing - set dma addressing
1033  * @ioc: per adapter object
1034  * @pdev: PCI device struct
1035  *
1036  * Returns 0 for success, non-zero for failure.
1037  */
1038 static int
1039 _base_config_dma_addressing(struct MPT2SAS_ADAPTER *ioc, struct pci_dev *pdev)
1040 {
1041         struct sysinfo s;
1042         char *desc = NULL;
1043
1044         if (sizeof(dma_addr_t) > 4) {
1045                 const uint64_t required_mask =
1046                     dma_get_required_mask(&pdev->dev);
1047                 if ((required_mask > DMA_BIT_MASK(32)) && !pci_set_dma_mask(pdev,
1048                     DMA_BIT_MASK(64)) && !pci_set_consistent_dma_mask(pdev,
1049                     DMA_BIT_MASK(64))) {
1050                         ioc->base_add_sg_single = &_base_add_sg_single_64;
1051                         ioc->sge_size = sizeof(Mpi2SGESimple64_t);
1052                         desc = "64";
1053                         goto out;
1054                 }
1055         }
1056
1057         if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))
1058             && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1059                 ioc->base_add_sg_single = &_base_add_sg_single_32;
1060                 ioc->sge_size = sizeof(Mpi2SGESimple32_t);
1061                 desc = "32";
1062         } else
1063                 return -ENODEV;
1064
1065  out:
1066         si_meminfo(&s);
1067         printk(MPT2SAS_INFO_FMT "%s BIT PCI BUS DMA ADDRESSING SUPPORTED, "
1068             "total mem (%ld kB)\n", ioc->name, desc, convert_to_kb(s.totalram));
1069
1070         return 0;
1071 }
1072
1073 /**
1074  * _base_save_msix_table - backup msix vector table
1075  * @ioc: per adapter object
1076  *
1077  * This address an errata where diag reset clears out the table
1078  */
1079 static void
1080 _base_save_msix_table(struct MPT2SAS_ADAPTER *ioc)
1081 {
1082         int i;
1083
1084         if (!ioc->msix_enable || ioc->msix_table_backup == NULL)
1085                 return;
1086
1087         for (i = 0; i < ioc->msix_vector_count; i++)
1088                 ioc->msix_table_backup[i] = ioc->msix_table[i];
1089 }
1090
1091 /**
1092  * _base_restore_msix_table - this restores the msix vector table
1093  * @ioc: per adapter object
1094  *
1095  */
1096 static void
1097 _base_restore_msix_table(struct MPT2SAS_ADAPTER *ioc)
1098 {
1099         int i;
1100
1101         if (!ioc->msix_enable || ioc->msix_table_backup == NULL)
1102                 return;
1103
1104         for (i = 0; i < ioc->msix_vector_count; i++)
1105                 ioc->msix_table[i] = ioc->msix_table_backup[i];
1106 }
1107
1108 /**
1109  * _base_check_enable_msix - checks MSIX capabable.
1110  * @ioc: per adapter object
1111  *
1112  * Check to see if card is capable of MSIX, and set number
1113  * of avaliable msix vectors
1114  */
1115 static int
1116 _base_check_enable_msix(struct MPT2SAS_ADAPTER *ioc)
1117 {
1118         int base;
1119         u16 message_control;
1120         u32 msix_table_offset;
1121
1122         base = pci_find_capability(ioc->pdev, PCI_CAP_ID_MSIX);
1123         if (!base) {
1124                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "msix not "
1125                     "supported\n", ioc->name));
1126                 return -EINVAL;
1127         }
1128
1129         /* get msix vector count */
1130         pci_read_config_word(ioc->pdev, base + 2, &message_control);
1131         ioc->msix_vector_count = (message_control & 0x3FF) + 1;
1132
1133         /* get msix table  */
1134         pci_read_config_dword(ioc->pdev, base + 4, &msix_table_offset);
1135         msix_table_offset &= 0xFFFFFFF8;
1136         ioc->msix_table = (u32 *)((void *)ioc->chip + msix_table_offset);
1137
1138         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "msix is supported, "
1139             "vector_count(%d), table_offset(0x%08x), table(%p)\n", ioc->name,
1140             ioc->msix_vector_count, msix_table_offset, ioc->msix_table));
1141         return 0;
1142 }
1143
1144 /**
1145  * _base_disable_msix - disables msix
1146  * @ioc: per adapter object
1147  *
1148  */
1149 static void
1150 _base_disable_msix(struct MPT2SAS_ADAPTER *ioc)
1151 {
1152         if (ioc->msix_enable) {
1153                 pci_disable_msix(ioc->pdev);
1154                 kfree(ioc->msix_table_backup);
1155                 ioc->msix_table_backup = NULL;
1156                 ioc->msix_enable = 0;
1157         }
1158 }
1159
1160 /**
1161  * _base_enable_msix - enables msix, failback to io_apic
1162  * @ioc: per adapter object
1163  *
1164  */
1165 static int
1166 _base_enable_msix(struct MPT2SAS_ADAPTER *ioc)
1167 {
1168         struct msix_entry entries;
1169         int r;
1170         u8 try_msix = 0;
1171
1172         if (msix_disable == -1 || msix_disable == 0)
1173                 try_msix = 1;
1174
1175         if (!try_msix)
1176                 goto try_ioapic;
1177
1178         if (_base_check_enable_msix(ioc) != 0)
1179                 goto try_ioapic;
1180
1181         ioc->msix_table_backup = kcalloc(ioc->msix_vector_count,
1182             sizeof(u32), GFP_KERNEL);
1183         if (!ioc->msix_table_backup) {
1184                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "allocation for "
1185                     "msix_table_backup failed!!!\n", ioc->name));
1186                 goto try_ioapic;
1187         }
1188
1189         memset(&entries, 0, sizeof(struct msix_entry));
1190         r = pci_enable_msix(ioc->pdev, &entries, 1);
1191         if (r) {
1192                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "pci_enable_msix "
1193                     "failed (r=%d) !!!\n", ioc->name, r));
1194                 goto try_ioapic;
1195         }
1196
1197         r = request_irq(entries.vector, _base_interrupt, IRQF_SHARED,
1198             ioc->name, ioc);
1199         if (r) {
1200                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "unable to allocate "
1201                     "interrupt %d !!!\n", ioc->name, entries.vector));
1202                 pci_disable_msix(ioc->pdev);
1203                 goto try_ioapic;
1204         }
1205
1206         ioc->pci_irq = entries.vector;
1207         ioc->msix_enable = 1;
1208         return 0;
1209
1210 /* failback to io_apic interrupt routing */
1211  try_ioapic:
1212
1213         r = request_irq(ioc->pdev->irq, _base_interrupt, IRQF_SHARED,
1214             ioc->name, ioc);
1215         if (r) {
1216                 printk(MPT2SAS_ERR_FMT "unable to allocate interrupt %d!\n",
1217                     ioc->name, ioc->pdev->irq);
1218                 r = -EBUSY;
1219                 goto out_fail;
1220         }
1221
1222         ioc->pci_irq = ioc->pdev->irq;
1223         return 0;
1224
1225  out_fail:
1226         return r;
1227 }
1228
1229 /**
1230  * mpt2sas_base_map_resources - map in controller resources (io/irq/memap)
1231  * @ioc: per adapter object
1232  *
1233  * Returns 0 for success, non-zero for failure.
1234  */
1235 int
1236 mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
1237 {
1238         struct pci_dev *pdev = ioc->pdev;
1239         u32 memap_sz;
1240         u32 pio_sz;
1241         int i, r = 0;
1242         u64 pio_chip = 0;
1243         u64 chip_phys = 0;
1244
1245         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n",
1246             ioc->name, __func__));
1247
1248         ioc->bars = pci_select_bars(pdev, IORESOURCE_MEM);
1249         if (pci_enable_device_mem(pdev)) {
1250                 printk(MPT2SAS_WARN_FMT "pci_enable_device_mem: "
1251                     "failed\n", ioc->name);
1252                 return -ENODEV;
1253         }
1254
1255
1256         if (pci_request_selected_regions(pdev, ioc->bars,
1257             MPT2SAS_DRIVER_NAME)) {
1258                 printk(MPT2SAS_WARN_FMT "pci_request_selected_regions: "
1259                     "failed\n", ioc->name);
1260                 r = -ENODEV;
1261                 goto out_fail;
1262         }
1263
1264         /* AER (Advanced Error Reporting) hooks */
1265         pci_enable_pcie_error_reporting(pdev);
1266
1267         pci_set_master(pdev);
1268
1269         if (_base_config_dma_addressing(ioc, pdev) != 0) {
1270                 printk(MPT2SAS_WARN_FMT "no suitable DMA mask for %s\n",
1271                     ioc->name, pci_name(pdev));
1272                 r = -ENODEV;
1273                 goto out_fail;
1274         }
1275
1276         for (i = 0, memap_sz = 0, pio_sz = 0 ; i < DEVICE_COUNT_RESOURCE; i++) {
1277                 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
1278                         if (pio_sz)
1279                                 continue;
1280                         pio_chip = (u64)pci_resource_start(pdev, i);
1281                         pio_sz = pci_resource_len(pdev, i);
1282                 } else {
1283                         if (memap_sz)
1284                                 continue;
1285                         /* verify memory resource is valid before using */
1286                         if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
1287                                 ioc->chip_phys = pci_resource_start(pdev, i);
1288                                 chip_phys = (u64)ioc->chip_phys;
1289                                 memap_sz = pci_resource_len(pdev, i);
1290                                 ioc->chip = ioremap(ioc->chip_phys, memap_sz);
1291                                 if (ioc->chip == NULL) {
1292                                         printk(MPT2SAS_ERR_FMT "unable to map "
1293                                             "adapter memory!\n", ioc->name);
1294                                         r = -EINVAL;
1295                                         goto out_fail;
1296                                 }
1297                         }
1298                 }
1299         }
1300
1301         _base_mask_interrupts(ioc);
1302         r = _base_enable_msix(ioc);
1303         if (r)
1304                 goto out_fail;
1305
1306         printk(MPT2SAS_INFO_FMT "%s: IRQ %d\n",
1307             ioc->name,  ((ioc->msix_enable) ? "PCI-MSI-X enabled" :
1308             "IO-APIC enabled"), ioc->pci_irq);
1309         printk(MPT2SAS_INFO_FMT "iomem(0x%016llx), mapped(0x%p), size(%d)\n",
1310             ioc->name, (unsigned long long)chip_phys, ioc->chip, memap_sz);
1311         printk(MPT2SAS_INFO_FMT "ioport(0x%016llx), size(%d)\n",
1312             ioc->name, (unsigned long long)pio_chip, pio_sz);
1313
1314         /* Save PCI configuration state for recovery from PCI AER/EEH errors */
1315         pci_save_state(pdev);
1316
1317         return 0;
1318
1319  out_fail:
1320         if (ioc->chip_phys)
1321                 iounmap(ioc->chip);
1322         ioc->chip_phys = 0;
1323         ioc->pci_irq = -1;
1324         pci_release_selected_regions(ioc->pdev, ioc->bars);
1325         pci_disable_pcie_error_reporting(pdev);
1326         pci_disable_device(pdev);
1327         return r;
1328 }
1329
1330 /**
1331  * mpt2sas_base_get_msg_frame - obtain request mf pointer
1332  * @ioc: per adapter object
1333  * @smid: system request message index(smid zero is invalid)
1334  *
1335  * Returns virt pointer to message frame.
1336  */
1337 void *
1338 mpt2sas_base_get_msg_frame(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1339 {
1340         return (void *)(ioc->request + (smid * ioc->request_sz));
1341 }
1342
1343 /**
1344  * mpt2sas_base_get_sense_buffer - obtain a sense buffer assigned to a mf request
1345  * @ioc: per adapter object
1346  * @smid: system request message index
1347  *
1348  * Returns virt pointer to sense buffer.
1349  */
1350 void *
1351 mpt2sas_base_get_sense_buffer(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1352 {
1353         return (void *)(ioc->sense + ((smid - 1) * SCSI_SENSE_BUFFERSIZE));
1354 }
1355
1356 /**
1357  * mpt2sas_base_get_sense_buffer_dma - obtain a sense buffer assigned to a mf request
1358  * @ioc: per adapter object
1359  * @smid: system request message index
1360  *
1361  * Returns phys pointer to the low 32bit address of the sense buffer.
1362  */
1363 __le32
1364 mpt2sas_base_get_sense_buffer_dma(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1365 {
1366         return cpu_to_le32(ioc->sense_dma +
1367                         ((smid - 1) * SCSI_SENSE_BUFFERSIZE));
1368 }
1369
1370 /**
1371  * mpt2sas_base_get_reply_virt_addr - obtain reply frames virt address
1372  * @ioc: per adapter object
1373  * @phys_addr: lower 32 physical addr of the reply
1374  *
1375  * Converts 32bit lower physical addr into a virt address.
1376  */
1377 void *
1378 mpt2sas_base_get_reply_virt_addr(struct MPT2SAS_ADAPTER *ioc, u32 phys_addr)
1379 {
1380         if (!phys_addr)
1381                 return NULL;
1382         return ioc->reply + (phys_addr - (u32)ioc->reply_dma);
1383 }
1384
1385 /**
1386  * mpt2sas_base_get_smid - obtain a free smid from internal queue
1387  * @ioc: per adapter object
1388  * @cb_idx: callback index
1389  *
1390  * Returns smid (zero is invalid)
1391  */
1392 u16
1393 mpt2sas_base_get_smid(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx)
1394 {
1395         unsigned long flags;
1396         struct request_tracker *request;
1397         u16 smid;
1398
1399         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1400         if (list_empty(&ioc->internal_free_list)) {
1401                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1402                 printk(MPT2SAS_ERR_FMT "%s: smid not available\n",
1403                     ioc->name, __func__);
1404                 return 0;
1405         }
1406
1407         request = list_entry(ioc->internal_free_list.next,
1408             struct request_tracker, tracker_list);
1409         request->cb_idx = cb_idx;
1410         smid = request->smid;
1411         list_del(&request->tracker_list);
1412         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1413         return smid;
1414 }
1415
1416 /**
1417  * mpt2sas_base_get_smid_scsiio - obtain a free smid from scsiio queue
1418  * @ioc: per adapter object
1419  * @cb_idx: callback index
1420  * @scmd: pointer to scsi command object
1421  *
1422  * Returns smid (zero is invalid)
1423  */
1424 u16
1425 mpt2sas_base_get_smid_scsiio(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx,
1426     struct scsi_cmnd *scmd)
1427 {
1428         unsigned long flags;
1429         struct request_tracker *request;
1430         u16 smid;
1431
1432         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1433         if (list_empty(&ioc->free_list)) {
1434                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1435                 printk(MPT2SAS_ERR_FMT "%s: smid not available\n",
1436                     ioc->name, __func__);
1437                 return 0;
1438         }
1439
1440         request = list_entry(ioc->free_list.next,
1441             struct request_tracker, tracker_list);
1442         request->scmd = scmd;
1443         request->cb_idx = cb_idx;
1444         smid = request->smid;
1445         list_del(&request->tracker_list);
1446         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1447         return smid;
1448 }
1449
1450 /**
1451  * mpt2sas_base_get_smid_hpr - obtain a free smid from hi-priority queue
1452  * @ioc: per adapter object
1453  * @cb_idx: callback index
1454  *
1455  * Returns smid (zero is invalid)
1456  */
1457 u16
1458 mpt2sas_base_get_smid_hpr(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx)
1459 {
1460         unsigned long flags;
1461         struct request_tracker *request;
1462         u16 smid;
1463
1464         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1465         if (list_empty(&ioc->hpr_free_list)) {
1466                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1467                 return 0;
1468         }
1469
1470         request = list_entry(ioc->hpr_free_list.next,
1471             struct request_tracker, tracker_list);
1472         request->cb_idx = cb_idx;
1473         smid = request->smid;
1474         list_del(&request->tracker_list);
1475         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1476         return smid;
1477 }
1478
1479
1480 /**
1481  * mpt2sas_base_free_smid - put smid back on free_list
1482  * @ioc: per adapter object
1483  * @smid: system request message index
1484  *
1485  * Return nothing.
1486  */
1487 void
1488 mpt2sas_base_free_smid(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1489 {
1490         unsigned long flags;
1491         int i;
1492
1493         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1494         if (smid >= ioc->hi_priority_smid) {
1495                 if (smid < ioc->internal_smid) {
1496                         /* hi-priority */
1497                         i = smid - ioc->hi_priority_smid;
1498                         ioc->hpr_lookup[i].cb_idx = 0xFF;
1499                         list_add_tail(&ioc->hpr_lookup[i].tracker_list,
1500                             &ioc->hpr_free_list);
1501                 } else {
1502                         /* internal queue */
1503                         i = smid - ioc->internal_smid;
1504                         ioc->internal_lookup[i].cb_idx = 0xFF;
1505                         list_add_tail(&ioc->internal_lookup[i].tracker_list,
1506                             &ioc->internal_free_list);
1507                 }
1508                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1509                 return;
1510         }
1511
1512         /* scsiio queue */
1513         i = smid - 1;
1514         ioc->scsi_lookup[i].cb_idx = 0xFF;
1515         ioc->scsi_lookup[i].scmd = NULL;
1516         list_add_tail(&ioc->scsi_lookup[i].tracker_list,
1517             &ioc->free_list);
1518         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1519
1520         /*
1521          * See _wait_for_commands_to_complete() call with regards to this code.
1522          */
1523         if (ioc->shost_recovery && ioc->pending_io_count) {
1524                 if (ioc->pending_io_count == 1)
1525                         wake_up(&ioc->reset_wq);
1526                 ioc->pending_io_count--;
1527         }
1528 }
1529
1530 /**
1531  * _base_writeq - 64 bit write to MMIO
1532  * @ioc: per adapter object
1533  * @b: data payload
1534  * @addr: address in MMIO space
1535  * @writeq_lock: spin lock
1536  *
1537  * Glue for handling an atomic 64 bit word to MMIO. This special handling takes
1538  * care of 32 bit environment where its not quarenteed to send the entire word
1539  * in one transfer.
1540  */
1541 #ifndef writeq
1542 static inline void _base_writeq(__u64 b, volatile void __iomem *addr,
1543     spinlock_t *writeq_lock)
1544 {
1545         unsigned long flags;
1546         __u64 data_out = cpu_to_le64(b);
1547
1548         spin_lock_irqsave(writeq_lock, flags);
1549         writel((u32)(data_out), addr);
1550         writel((u32)(data_out >> 32), (addr + 4));
1551         spin_unlock_irqrestore(writeq_lock, flags);
1552 }
1553 #else
1554 static inline void _base_writeq(__u64 b, volatile void __iomem *addr,
1555     spinlock_t *writeq_lock)
1556 {
1557         writeq(cpu_to_le64(b), addr);
1558 }
1559 #endif
1560
1561 /**
1562  * mpt2sas_base_put_smid_scsi_io - send SCSI_IO request to firmware
1563  * @ioc: per adapter object
1564  * @smid: system request message index
1565  * @handle: device handle
1566  *
1567  * Return nothing.
1568  */
1569 void
1570 mpt2sas_base_put_smid_scsi_io(struct MPT2SAS_ADAPTER *ioc, u16 smid, u16 handle)
1571 {
1572         Mpi2RequestDescriptorUnion_t descriptor;
1573         u64 *request = (u64 *)&descriptor;
1574
1575
1576         descriptor.SCSIIO.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO;
1577         descriptor.SCSIIO.MSIxIndex = 0; /* TODO */
1578         descriptor.SCSIIO.SMID = cpu_to_le16(smid);
1579         descriptor.SCSIIO.DevHandle = cpu_to_le16(handle);
1580         descriptor.SCSIIO.LMID = 0;
1581         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1582             &ioc->scsi_lookup_lock);
1583 }
1584
1585
1586 /**
1587  * mpt2sas_base_put_smid_hi_priority - send Task Managment request to firmware
1588  * @ioc: per adapter object
1589  * @smid: system request message index
1590  *
1591  * Return nothing.
1592  */
1593 void
1594 mpt2sas_base_put_smid_hi_priority(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1595 {
1596         Mpi2RequestDescriptorUnion_t descriptor;
1597         u64 *request = (u64 *)&descriptor;
1598
1599         descriptor.HighPriority.RequestFlags =
1600             MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY;
1601         descriptor.HighPriority.MSIxIndex = 0; /* TODO */
1602         descriptor.HighPriority.SMID = cpu_to_le16(smid);
1603         descriptor.HighPriority.LMID = 0;
1604         descriptor.HighPriority.Reserved1 = 0;
1605         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1606             &ioc->scsi_lookup_lock);
1607 }
1608
1609 /**
1610  * mpt2sas_base_put_smid_default - Default, primarily used for config pages
1611  * @ioc: per adapter object
1612  * @smid: system request message index
1613  *
1614  * Return nothing.
1615  */
1616 void
1617 mpt2sas_base_put_smid_default(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1618 {
1619         Mpi2RequestDescriptorUnion_t descriptor;
1620         u64 *request = (u64 *)&descriptor;
1621
1622         descriptor.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
1623         descriptor.Default.MSIxIndex = 0; /* TODO */
1624         descriptor.Default.SMID = cpu_to_le16(smid);
1625         descriptor.Default.LMID = 0;
1626         descriptor.Default.DescriptorTypeDependent = 0;
1627         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1628             &ioc->scsi_lookup_lock);
1629 }
1630
1631 /**
1632  * mpt2sas_base_put_smid_target_assist - send Target Assist/Status to firmware
1633  * @ioc: per adapter object
1634  * @smid: system request message index
1635  * @io_index: value used to track the IO
1636  *
1637  * Return nothing.
1638  */
1639 void
1640 mpt2sas_base_put_smid_target_assist(struct MPT2SAS_ADAPTER *ioc, u16 smid,
1641     u16 io_index)
1642 {
1643         Mpi2RequestDescriptorUnion_t descriptor;
1644         u64 *request = (u64 *)&descriptor;
1645
1646         descriptor.SCSITarget.RequestFlags =
1647             MPI2_REQ_DESCRIPT_FLAGS_SCSI_TARGET;
1648         descriptor.SCSITarget.MSIxIndex = 0; /* TODO */
1649         descriptor.SCSITarget.SMID = cpu_to_le16(smid);
1650         descriptor.SCSITarget.LMID = 0;
1651         descriptor.SCSITarget.IoIndex = cpu_to_le16(io_index);
1652         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1653             &ioc->scsi_lookup_lock);
1654 }
1655
1656 /**
1657  * _base_display_dell_branding - Disply branding string
1658  * @ioc: per adapter object
1659  *
1660  * Return nothing.
1661  */
1662 static void
1663 _base_display_dell_branding(struct MPT2SAS_ADAPTER *ioc)
1664 {
1665         char dell_branding[MPT2SAS_DELL_BRANDING_SIZE];
1666
1667         if (ioc->pdev->subsystem_vendor != PCI_VENDOR_ID_DELL)
1668                 return;
1669
1670         memset(dell_branding, 0, MPT2SAS_DELL_BRANDING_SIZE);
1671         switch (ioc->pdev->subsystem_device) {
1672         case MPT2SAS_DELL_6GBPS_SAS_HBA_SSDID:
1673                 strncpy(dell_branding, MPT2SAS_DELL_6GBPS_SAS_HBA_BRANDING,
1674                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1675                 break;
1676         case MPT2SAS_DELL_PERC_H200_ADAPTER_SSDID:
1677                 strncpy(dell_branding, MPT2SAS_DELL_PERC_H200_ADAPTER_BRANDING,
1678                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1679                 break;
1680         case MPT2SAS_DELL_PERC_H200_INTEGRATED_SSDID:
1681                 strncpy(dell_branding,
1682                     MPT2SAS_DELL_PERC_H200_INTEGRATED_BRANDING,
1683                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1684                 break;
1685         case MPT2SAS_DELL_PERC_H200_MODULAR_SSDID:
1686                 strncpy(dell_branding,
1687                     MPT2SAS_DELL_PERC_H200_MODULAR_BRANDING,
1688                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1689                 break;
1690         case MPT2SAS_DELL_PERC_H200_EMBEDDED_SSDID:
1691                 strncpy(dell_branding,
1692                     MPT2SAS_DELL_PERC_H200_EMBEDDED_BRANDING,
1693                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1694                 break;
1695         case MPT2SAS_DELL_PERC_H200_SSDID:
1696                 strncpy(dell_branding, MPT2SAS_DELL_PERC_H200_BRANDING,
1697                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1698                 break;
1699         case MPT2SAS_DELL_6GBPS_SAS_SSDID:
1700                 strncpy(dell_branding, MPT2SAS_DELL_6GBPS_SAS_BRANDING,
1701                     MPT2SAS_DELL_BRANDING_SIZE - 1);
1702                 break;
1703         default:
1704                 sprintf(dell_branding, "0x%4X", ioc->pdev->subsystem_device);
1705                 break;
1706         }
1707
1708         printk(MPT2SAS_INFO_FMT "%s: Vendor(0x%04X), Device(0x%04X),"
1709             " SSVID(0x%04X), SSDID(0x%04X)\n", ioc->name, dell_branding,
1710             ioc->pdev->vendor, ioc->pdev->device, ioc->pdev->subsystem_vendor,
1711             ioc->pdev->subsystem_device);
1712 }
1713
1714 /**
1715  * _base_display_ioc_capabilities - Disply IOC's capabilities.
1716  * @ioc: per adapter object
1717  *
1718  * Return nothing.
1719  */
1720 static void
1721 _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
1722 {
1723         int i = 0;
1724         char desc[16];
1725         u8 revision;
1726         u32 iounit_pg1_flags;
1727
1728         pci_read_config_byte(ioc->pdev, PCI_CLASS_REVISION, &revision);
1729         strncpy(desc, ioc->manu_pg0.ChipName, 16);
1730         printk(MPT2SAS_INFO_FMT "%s: FWVersion(%02d.%02d.%02d.%02d), "
1731            "ChipRevision(0x%02x), BiosVersion(%02d.%02d.%02d.%02d)\n",
1732             ioc->name, desc,
1733            (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
1734            (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
1735            (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
1736            ioc->facts.FWVersion.Word & 0x000000FF,
1737            revision,
1738            (ioc->bios_pg3.BiosVersion & 0xFF000000) >> 24,
1739            (ioc->bios_pg3.BiosVersion & 0x00FF0000) >> 16,
1740            (ioc->bios_pg3.BiosVersion & 0x0000FF00) >> 8,
1741             ioc->bios_pg3.BiosVersion & 0x000000FF);
1742
1743         _base_display_dell_branding(ioc);
1744
1745         printk(MPT2SAS_INFO_FMT "Protocol=(", ioc->name);
1746
1747         if (ioc->facts.ProtocolFlags & MPI2_IOCFACTS_PROTOCOL_SCSI_INITIATOR) {
1748                 printk("Initiator");
1749                 i++;
1750         }
1751
1752         if (ioc->facts.ProtocolFlags & MPI2_IOCFACTS_PROTOCOL_SCSI_TARGET) {
1753                 printk("%sTarget", i ? "," : "");
1754                 i++;
1755         }
1756
1757         i = 0;
1758         printk("), ");
1759         printk("Capabilities=(");
1760
1761         if (ioc->facts.IOCCapabilities &
1762             MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID) {
1763                 printk("Raid");
1764                 i++;
1765         }
1766
1767         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR) {
1768                 printk("%sTLR", i ? "," : "");
1769                 i++;
1770         }
1771
1772         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_MULTICAST) {
1773                 printk("%sMulticast", i ? "," : "");
1774                 i++;
1775         }
1776
1777         if (ioc->facts.IOCCapabilities &
1778             MPI2_IOCFACTS_CAPABILITY_BIDIRECTIONAL_TARGET) {
1779                 printk("%sBIDI Target", i ? "," : "");
1780                 i++;
1781         }
1782
1783         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_EEDP) {
1784                 printk("%sEEDP", i ? "," : "");
1785                 i++;
1786         }
1787
1788         if (ioc->facts.IOCCapabilities &
1789             MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER) {
1790                 printk("%sSnapshot Buffer", i ? "," : "");
1791                 i++;
1792         }
1793
1794         if (ioc->facts.IOCCapabilities &
1795             MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER) {
1796                 printk("%sDiag Trace Buffer", i ? "," : "");
1797                 i++;
1798         }
1799
1800         if (ioc->facts.IOCCapabilities &
1801             MPI2_IOCFACTS_CAPABILITY_EXTENDED_BUFFER) {
1802                 printk(KERN_INFO "%sDiag Extended Buffer", i ? "," : "");
1803                 i++;
1804         }
1805
1806         if (ioc->facts.IOCCapabilities &
1807             MPI2_IOCFACTS_CAPABILITY_TASK_SET_FULL_HANDLING) {
1808                 printk("%sTask Set Full", i ? "," : "");
1809                 i++;
1810         }
1811
1812         iounit_pg1_flags = le32_to_cpu(ioc->iounit_pg1.Flags);
1813         if (!(iounit_pg1_flags & MPI2_IOUNITPAGE1_NATIVE_COMMAND_Q_DISABLE)) {
1814                 printk("%sNCQ", i ? "," : "");
1815                 i++;
1816         }
1817
1818         printk(")\n");
1819 }
1820
1821 /**
1822  * _base_static_config_pages - static start of day config pages
1823  * @ioc: per adapter object
1824  *
1825  * Return nothing.
1826  */
1827 static void
1828 _base_static_config_pages(struct MPT2SAS_ADAPTER *ioc)
1829 {
1830         Mpi2ConfigReply_t mpi_reply;
1831         u32 iounit_pg1_flags;
1832
1833         mpt2sas_config_get_manufacturing_pg0(ioc, &mpi_reply, &ioc->manu_pg0);
1834         if (ioc->ir_firmware)
1835                 mpt2sas_config_get_manufacturing_pg10(ioc, &mpi_reply,
1836                     &ioc->manu_pg10);
1837         mpt2sas_config_get_bios_pg2(ioc, &mpi_reply, &ioc->bios_pg2);
1838         mpt2sas_config_get_bios_pg3(ioc, &mpi_reply, &ioc->bios_pg3);
1839         mpt2sas_config_get_ioc_pg8(ioc, &mpi_reply, &ioc->ioc_pg8);
1840         mpt2sas_config_get_iounit_pg0(ioc, &mpi_reply, &ioc->iounit_pg0);
1841         mpt2sas_config_get_iounit_pg1(ioc, &mpi_reply, &ioc->iounit_pg1);
1842         _base_display_ioc_capabilities(ioc);
1843
1844         /*
1845          * Enable task_set_full handling in iounit_pg1 when the
1846          * facts capabilities indicate that its supported.
1847          */
1848         iounit_pg1_flags = le32_to_cpu(ioc->iounit_pg1.Flags);
1849         if ((ioc->facts.IOCCapabilities &
1850             MPI2_IOCFACTS_CAPABILITY_TASK_SET_FULL_HANDLING))
1851                 iounit_pg1_flags &=
1852                     ~MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
1853         else
1854                 iounit_pg1_flags |=
1855                     MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
1856         ioc->iounit_pg1.Flags = cpu_to_le32(iounit_pg1_flags);
1857         mpt2sas_config_set_iounit_pg1(ioc, &mpi_reply, &ioc->iounit_pg1);
1858 }
1859
1860 /**
1861  * _base_release_memory_pools - release memory
1862  * @ioc: per adapter object
1863  *
1864  * Free memory allocated from _base_allocate_memory_pools.
1865  *
1866  * Return nothing.
1867  */
1868 static void
1869 _base_release_memory_pools(struct MPT2SAS_ADAPTER *ioc)
1870 {
1871         dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1872             __func__));
1873
1874         if (ioc->request) {
1875                 pci_free_consistent(ioc->pdev, ioc->request_dma_sz,
1876                     ioc->request,  ioc->request_dma);
1877                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "request_pool(0x%p)"
1878                     ": free\n", ioc->name, ioc->request));
1879                 ioc->request = NULL;
1880         }
1881
1882         if (ioc->sense) {
1883                 pci_pool_free(ioc->sense_dma_pool, ioc->sense, ioc->sense_dma);
1884                 if (ioc->sense_dma_pool)
1885                         pci_pool_destroy(ioc->sense_dma_pool);
1886                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "sense_pool(0x%p)"
1887                     ": free\n", ioc->name, ioc->sense));
1888                 ioc->sense = NULL;
1889         }
1890
1891         if (ioc->reply) {
1892                 pci_pool_free(ioc->reply_dma_pool, ioc->reply, ioc->reply_dma);
1893                 if (ioc->reply_dma_pool)
1894                         pci_pool_destroy(ioc->reply_dma_pool);
1895                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_pool(0x%p)"
1896                      ": free\n", ioc->name, ioc->reply));
1897                 ioc->reply = NULL;
1898         }
1899
1900         if (ioc->reply_free) {
1901                 pci_pool_free(ioc->reply_free_dma_pool, ioc->reply_free,
1902                     ioc->reply_free_dma);
1903                 if (ioc->reply_free_dma_pool)
1904                         pci_pool_destroy(ioc->reply_free_dma_pool);
1905                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free_pool"
1906                     "(0x%p): free\n", ioc->name, ioc->reply_free));
1907                 ioc->reply_free = NULL;
1908         }
1909
1910         if (ioc->reply_post_free) {
1911                 pci_pool_free(ioc->reply_post_free_dma_pool,
1912                     ioc->reply_post_free, ioc->reply_post_free_dma);
1913                 if (ioc->reply_post_free_dma_pool)
1914                         pci_pool_destroy(ioc->reply_post_free_dma_pool);
1915                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT
1916                     "reply_post_free_pool(0x%p): free\n", ioc->name,
1917                     ioc->reply_post_free));
1918                 ioc->reply_post_free = NULL;
1919         }
1920
1921         if (ioc->config_page) {
1922                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT
1923                     "config_page(0x%p): free\n", ioc->name,
1924                     ioc->config_page));
1925                 pci_free_consistent(ioc->pdev, ioc->config_page_sz,
1926                     ioc->config_page, ioc->config_page_dma);
1927         }
1928
1929         if (ioc->scsi_lookup) {
1930                 free_pages((ulong)ioc->scsi_lookup, ioc->scsi_lookup_pages);
1931                 ioc->scsi_lookup = NULL;
1932         }
1933         kfree(ioc->hpr_lookup);
1934         kfree(ioc->internal_lookup);
1935 }
1936
1937
1938 /**
1939  * _base_allocate_memory_pools - allocate start of day memory pools
1940  * @ioc: per adapter object
1941  * @sleep_flag: CAN_SLEEP or NO_SLEEP
1942  *
1943  * Returns 0 success, anything else error
1944  */
1945 static int
1946 _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc,  int sleep_flag)
1947 {
1948         Mpi2IOCFactsReply_t *facts;
1949         u32 queue_size, queue_diff;
1950         u16 max_sge_elements;
1951         u16 num_of_reply_frames;
1952         u16 chains_needed_per_io;
1953         u32 sz, total_sz;
1954         u32 retry_sz;
1955         u16 max_request_credit;
1956
1957         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
1958             __func__));
1959
1960         retry_sz = 0;
1961         facts = &ioc->facts;
1962
1963         /* command line tunables  for max sgl entries */
1964         if (max_sgl_entries != -1) {
1965                 ioc->shost->sg_tablesize = (max_sgl_entries <
1966                     MPT2SAS_SG_DEPTH) ? max_sgl_entries :
1967                     MPT2SAS_SG_DEPTH;
1968         } else {
1969                 ioc->shost->sg_tablesize = MPT2SAS_SG_DEPTH;
1970         }
1971
1972         /* command line tunables  for max controller queue depth */
1973         if (max_queue_depth != -1) {
1974                 max_request_credit = (max_queue_depth < facts->RequestCredit)
1975                     ? max_queue_depth : facts->RequestCredit;
1976         } else {
1977                 max_request_credit = (facts->RequestCredit >
1978                     MPT2SAS_MAX_REQUEST_QUEUE) ? MPT2SAS_MAX_REQUEST_QUEUE :
1979                     facts->RequestCredit;
1980         }
1981
1982         ioc->hba_queue_depth = max_request_credit;
1983         ioc->hi_priority_depth = facts->HighPriorityCredit;
1984         ioc->internal_depth = ioc->hi_priority_depth + 5;
1985
1986         /* request frame size */
1987         ioc->request_sz = facts->IOCRequestFrameSize * 4;
1988
1989         /* reply frame size */
1990         ioc->reply_sz = facts->ReplyFrameSize * 4;
1991
1992  retry_allocation:
1993         total_sz = 0;
1994         /* calculate number of sg elements left over in the 1st frame */
1995         max_sge_elements = ioc->request_sz - ((sizeof(Mpi2SCSIIORequest_t) -
1996             sizeof(Mpi2SGEIOUnion_t)) + ioc->sge_size);
1997         ioc->max_sges_in_main_message = max_sge_elements/ioc->sge_size;
1998
1999         /* now do the same for a chain buffer */
2000         max_sge_elements = ioc->request_sz - ioc->sge_size;
2001         ioc->max_sges_in_chain_message = max_sge_elements/ioc->sge_size;
2002
2003         ioc->chain_offset_value_for_main_message =
2004             ((sizeof(Mpi2SCSIIORequest_t) - sizeof(Mpi2SGEIOUnion_t)) +
2005              (ioc->max_sges_in_chain_message * ioc->sge_size)) / 4;
2006
2007         /*
2008          *  MPT2SAS_SG_DEPTH = CONFIG_FUSION_MAX_SGE
2009          */
2010         chains_needed_per_io = ((ioc->shost->sg_tablesize -
2011            ioc->max_sges_in_main_message)/ioc->max_sges_in_chain_message)
2012             + 1;
2013         if (chains_needed_per_io > facts->MaxChainDepth) {
2014                 chains_needed_per_io = facts->MaxChainDepth;
2015                 ioc->shost->sg_tablesize = min_t(u16,
2016                 ioc->max_sges_in_main_message + (ioc->max_sges_in_chain_message
2017                 * chains_needed_per_io), ioc->shost->sg_tablesize);
2018         }
2019         ioc->chains_needed_per_io = chains_needed_per_io;
2020
2021         /* reply free queue sizing - taking into account for events */
2022         num_of_reply_frames = ioc->hba_queue_depth + 32;
2023
2024         /* number of replies frames can't be a multiple of 16 */
2025         /* decrease number of reply frames by 1 */
2026         if (!(num_of_reply_frames % 16))
2027                 num_of_reply_frames--;
2028
2029         /* calculate number of reply free queue entries
2030          *  (must be multiple of 16)
2031          */
2032
2033         /* (we know reply_free_queue_depth is not a multiple of 16) */
2034         queue_size = num_of_reply_frames;
2035         queue_size += 16 - (queue_size % 16);
2036         ioc->reply_free_queue_depth = queue_size;
2037
2038         /* reply descriptor post queue sizing */
2039         /* this size should be the number of request frames + number of reply
2040          * frames
2041          */
2042
2043         queue_size = ioc->hba_queue_depth + num_of_reply_frames + 1;
2044         /* round up to 16 byte boundary */
2045         if (queue_size % 16)
2046                 queue_size += 16 - (queue_size % 16);
2047
2048         /* check against IOC maximum reply post queue depth */
2049         if (queue_size > facts->MaxReplyDescriptorPostQueueDepth) {
2050                 queue_diff = queue_size -
2051                     facts->MaxReplyDescriptorPostQueueDepth;
2052
2053                 /* round queue_diff up to multiple of 16 */
2054                 if (queue_diff % 16)
2055                         queue_diff += 16 - (queue_diff % 16);
2056
2057                 /* adjust hba_queue_depth, reply_free_queue_depth,
2058                  * and queue_size
2059                  */
2060                 ioc->hba_queue_depth -= queue_diff;
2061                 ioc->reply_free_queue_depth -= queue_diff;
2062                 queue_size -= queue_diff;
2063         }
2064         ioc->reply_post_queue_depth = queue_size;
2065
2066         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "scatter gather: "
2067             "sge_in_main_msg(%d), sge_per_chain(%d), sge_per_io(%d), "
2068             "chains_per_io(%d)\n", ioc->name, ioc->max_sges_in_main_message,
2069             ioc->max_sges_in_chain_message, ioc->shost->sg_tablesize,
2070             ioc->chains_needed_per_io));
2071
2072         ioc->scsiio_depth = ioc->hba_queue_depth -
2073             ioc->hi_priority_depth - ioc->internal_depth;
2074
2075         /* set the scsi host can_queue depth
2076          * with some internal commands that could be outstanding
2077          */
2078         ioc->shost->can_queue = ioc->scsiio_depth - (2);
2079         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "scsi host: "
2080             "can_queue depth (%d)\n", ioc->name, ioc->shost->can_queue));
2081
2082         /* contiguous pool for request and chains, 16 byte align, one extra "
2083          * "frame for smid=0
2084          */
2085         ioc->chain_depth = ioc->chains_needed_per_io * ioc->scsiio_depth;
2086         sz = ((ioc->scsiio_depth + 1 + ioc->chain_depth) * ioc->request_sz);
2087
2088         /* hi-priority queue */
2089         sz += (ioc->hi_priority_depth * ioc->request_sz);
2090
2091         /* internal queue */
2092         sz += (ioc->internal_depth * ioc->request_sz);
2093
2094         ioc->request_dma_sz = sz;
2095         ioc->request = pci_alloc_consistent(ioc->pdev, sz, &ioc->request_dma);
2096         if (!ioc->request) {
2097                 printk(MPT2SAS_ERR_FMT "request pool: pci_alloc_consistent "
2098                     "failed: hba_depth(%d), chains_per_io(%d), frame_sz(%d), "
2099                     "total(%d kB)\n", ioc->name, ioc->hba_queue_depth,
2100                     ioc->chains_needed_per_io, ioc->request_sz, sz/1024);
2101                 if (ioc->scsiio_depth < MPT2SAS_SAS_QUEUE_DEPTH)
2102                         goto out;
2103                 retry_sz += 64;
2104                 ioc->hba_queue_depth = max_request_credit - retry_sz;
2105                 goto retry_allocation;
2106         }
2107
2108         if (retry_sz)
2109                 printk(MPT2SAS_ERR_FMT "request pool: pci_alloc_consistent "
2110                     "succeed: hba_depth(%d), chains_per_io(%d), frame_sz(%d), "
2111                     "total(%d kb)\n", ioc->name, ioc->hba_queue_depth,
2112                     ioc->chains_needed_per_io, ioc->request_sz, sz/1024);
2113
2114
2115         /* hi-priority queue */
2116         ioc->hi_priority = ioc->request + ((ioc->scsiio_depth + 1) *
2117             ioc->request_sz);
2118         ioc->hi_priority_dma = ioc->request_dma + ((ioc->scsiio_depth + 1) *
2119             ioc->request_sz);
2120
2121         /* internal queue */
2122         ioc->internal = ioc->hi_priority + (ioc->hi_priority_depth *
2123             ioc->request_sz);
2124         ioc->internal_dma = ioc->hi_priority_dma + (ioc->hi_priority_depth *
2125             ioc->request_sz);
2126
2127         ioc->chain = ioc->internal + (ioc->internal_depth *
2128             ioc->request_sz);
2129         ioc->chain_dma = ioc->internal_dma + (ioc->internal_depth *
2130             ioc->request_sz);
2131
2132         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request pool(0x%p): "
2133             "depth(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name,
2134             ioc->request, ioc->hba_queue_depth, ioc->request_sz,
2135             (ioc->hba_queue_depth * ioc->request_sz)/1024));
2136         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "chain pool(0x%p): depth"
2137             "(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name, ioc->chain,
2138             ioc->chain_depth, ioc->request_sz, ((ioc->chain_depth *
2139             ioc->request_sz))/1024));
2140         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request pool: dma(0x%llx)\n",
2141             ioc->name, (unsigned long long) ioc->request_dma));
2142         total_sz += sz;
2143
2144         sz = ioc->scsiio_depth * sizeof(struct request_tracker);
2145         ioc->scsi_lookup_pages = get_order(sz);
2146         ioc->scsi_lookup = (struct request_tracker *)__get_free_pages(
2147             GFP_KERNEL, ioc->scsi_lookup_pages);
2148         if (!ioc->scsi_lookup) {
2149                 printk(MPT2SAS_ERR_FMT "scsi_lookup: get_free_pages failed, "
2150                     "sz(%d)\n", ioc->name, (int)sz);
2151                 goto out;
2152         }
2153
2154         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "scsiio(0x%p): "
2155             "depth(%d)\n", ioc->name, ioc->request,
2156             ioc->scsiio_depth));
2157
2158         /* initialize hi-priority queue smid's */
2159         ioc->hpr_lookup = kcalloc(ioc->hi_priority_depth,
2160             sizeof(struct request_tracker), GFP_KERNEL);
2161         if (!ioc->hpr_lookup) {
2162                 printk(MPT2SAS_ERR_FMT "hpr_lookup: kcalloc failed\n",
2163                     ioc->name);
2164                 goto out;
2165         }
2166         ioc->hi_priority_smid = ioc->scsiio_depth + 1;
2167         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "hi_priority(0x%p): "
2168             "depth(%d), start smid(%d)\n", ioc->name, ioc->hi_priority,
2169             ioc->hi_priority_depth, ioc->hi_priority_smid));
2170
2171         /* initialize internal queue smid's */
2172         ioc->internal_lookup = kcalloc(ioc->internal_depth,
2173             sizeof(struct request_tracker), GFP_KERNEL);
2174         if (!ioc->internal_lookup) {
2175                 printk(MPT2SAS_ERR_FMT "internal_lookup: kcalloc failed\n",
2176                     ioc->name);
2177                 goto out;
2178         }
2179         ioc->internal_smid = ioc->hi_priority_smid + ioc->hi_priority_depth;
2180         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "internal(0x%p): "
2181             "depth(%d), start smid(%d)\n", ioc->name, ioc->internal,
2182              ioc->internal_depth, ioc->internal_smid));
2183
2184         /* sense buffers, 4 byte align */
2185         sz = ioc->scsiio_depth * SCSI_SENSE_BUFFERSIZE;
2186         ioc->sense_dma_pool = pci_pool_create("sense pool", ioc->pdev, sz, 4,
2187             0);
2188         if (!ioc->sense_dma_pool) {
2189                 printk(MPT2SAS_ERR_FMT "sense pool: pci_pool_create failed\n",
2190                     ioc->name);
2191                 goto out;
2192         }
2193         ioc->sense = pci_pool_alloc(ioc->sense_dma_pool , GFP_KERNEL,
2194             &ioc->sense_dma);
2195         if (!ioc->sense) {
2196                 printk(MPT2SAS_ERR_FMT "sense pool: pci_pool_alloc failed\n",
2197                     ioc->name);
2198                 goto out;
2199         }
2200         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT
2201             "sense pool(0x%p): depth(%d), element_size(%d), pool_size"
2202             "(%d kB)\n", ioc->name, ioc->sense, ioc->scsiio_depth,
2203             SCSI_SENSE_BUFFERSIZE, sz/1024));
2204         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "sense_dma(0x%llx)\n",
2205             ioc->name, (unsigned long long)ioc->sense_dma));
2206         total_sz += sz;
2207
2208         /* reply pool, 4 byte align */
2209         sz = ioc->reply_free_queue_depth * ioc->reply_sz;
2210         ioc->reply_dma_pool = pci_pool_create("reply pool", ioc->pdev, sz, 4,
2211             0);
2212         if (!ioc->reply_dma_pool) {
2213                 printk(MPT2SAS_ERR_FMT "reply pool: pci_pool_create failed\n",
2214                     ioc->name);
2215                 goto out;
2216         }
2217         ioc->reply = pci_pool_alloc(ioc->reply_dma_pool , GFP_KERNEL,
2218             &ioc->reply_dma);
2219         if (!ioc->reply) {
2220                 printk(MPT2SAS_ERR_FMT "reply pool: pci_pool_alloc failed\n",
2221                     ioc->name);
2222                 goto out;
2223         }
2224         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply pool(0x%p): depth"
2225             "(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name, ioc->reply,
2226             ioc->reply_free_queue_depth, ioc->reply_sz, sz/1024));
2227         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_dma(0x%llx)\n",
2228             ioc->name, (unsigned long long)ioc->reply_dma));
2229         total_sz += sz;
2230
2231         /* reply free queue, 16 byte align */
2232         sz = ioc->reply_free_queue_depth * 4;
2233         ioc->reply_free_dma_pool = pci_pool_create("reply_free pool",
2234             ioc->pdev, sz, 16, 0);
2235         if (!ioc->reply_free_dma_pool) {
2236                 printk(MPT2SAS_ERR_FMT "reply_free pool: pci_pool_create "
2237                     "failed\n", ioc->name);
2238                 goto out;
2239         }
2240         ioc->reply_free = pci_pool_alloc(ioc->reply_free_dma_pool , GFP_KERNEL,
2241             &ioc->reply_free_dma);
2242         if (!ioc->reply_free) {
2243                 printk(MPT2SAS_ERR_FMT "reply_free pool: pci_pool_alloc "
2244                     "failed\n", ioc->name);
2245                 goto out;
2246         }
2247         memset(ioc->reply_free, 0, sz);
2248         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free pool(0x%p): "
2249             "depth(%d), element_size(%d), pool_size(%d kB)\n", ioc->name,
2250             ioc->reply_free, ioc->reply_free_queue_depth, 4, sz/1024));
2251         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free_dma"
2252             "(0x%llx)\n", ioc->name, (unsigned long long)ioc->reply_free_dma));
2253         total_sz += sz;
2254
2255         /* reply post queue, 16 byte align */
2256         sz = ioc->reply_post_queue_depth * sizeof(Mpi2DefaultReplyDescriptor_t);
2257         ioc->reply_post_free_dma_pool = pci_pool_create("reply_post_free pool",
2258             ioc->pdev, sz, 16, 0);
2259         if (!ioc->reply_post_free_dma_pool) {
2260                 printk(MPT2SAS_ERR_FMT "reply_post_free pool: pci_pool_create "
2261                     "failed\n", ioc->name);
2262                 goto out;
2263         }
2264         ioc->reply_post_free = pci_pool_alloc(ioc->reply_post_free_dma_pool ,
2265             GFP_KERNEL, &ioc->reply_post_free_dma);
2266         if (!ioc->reply_post_free) {
2267                 printk(MPT2SAS_ERR_FMT "reply_post_free pool: pci_pool_alloc "
2268                     "failed\n", ioc->name);
2269                 goto out;
2270         }
2271         memset(ioc->reply_post_free, 0, sz);
2272         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply post free pool"
2273             "(0x%p): depth(%d), element_size(%d), pool_size(%d kB)\n",
2274             ioc->name, ioc->reply_post_free, ioc->reply_post_queue_depth, 8,
2275             sz/1024));
2276         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_post_free_dma = "
2277             "(0x%llx)\n", ioc->name, (unsigned long long)
2278             ioc->reply_post_free_dma));
2279         total_sz += sz;
2280
2281         ioc->config_page_sz = 512;
2282         ioc->config_page = pci_alloc_consistent(ioc->pdev,
2283             ioc->config_page_sz, &ioc->config_page_dma);
2284         if (!ioc->config_page) {
2285                 printk(MPT2SAS_ERR_FMT "config page: pci_pool_alloc "
2286                     "failed\n", ioc->name);
2287                 goto out;
2288         }
2289         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "config page(0x%p): size"
2290             "(%d)\n", ioc->name, ioc->config_page, ioc->config_page_sz));
2291         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "config_page_dma"
2292             "(0x%llx)\n", ioc->name, (unsigned long long)ioc->config_page_dma));
2293         total_sz += ioc->config_page_sz;
2294
2295         printk(MPT2SAS_INFO_FMT "Allocated physical memory: size(%d kB)\n",
2296             ioc->name, total_sz/1024);
2297         printk(MPT2SAS_INFO_FMT "Current Controller Queue Depth(%d), "
2298             "Max Controller Queue Depth(%d)\n",
2299             ioc->name, ioc->shost->can_queue, facts->RequestCredit);
2300         printk(MPT2SAS_INFO_FMT "Scatter Gather Elements per IO(%d)\n",
2301             ioc->name, ioc->shost->sg_tablesize);
2302         return 0;
2303
2304  out:
2305         _base_release_memory_pools(ioc);
2306         return -ENOMEM;
2307 }
2308
2309
2310 /**
2311  * mpt2sas_base_get_iocstate - Get the current state of a MPT adapter.
2312  * @ioc: Pointer to MPT_ADAPTER structure
2313  * @cooked: Request raw or cooked IOC state
2314  *
2315  * Returns all IOC Doorbell register bits if cooked==0, else just the
2316  * Doorbell bits in MPI_IOC_STATE_MASK.
2317  */
2318 u32
2319 mpt2sas_base_get_iocstate(struct MPT2SAS_ADAPTER *ioc, int cooked)
2320 {
2321         u32 s, sc;
2322
2323         s = readl(&ioc->chip->Doorbell);
2324         sc = s & MPI2_IOC_STATE_MASK;
2325         return cooked ? sc : s;
2326 }
2327
2328 /**
2329  * _base_wait_on_iocstate - waiting on a particular ioc state
2330  * @ioc_state: controller state { READY, OPERATIONAL, or RESET }
2331  * @timeout: timeout in second
2332  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2333  *
2334  * Returns 0 for success, non-zero for failure.
2335  */
2336 static int
2337 _base_wait_on_iocstate(struct MPT2SAS_ADAPTER *ioc, u32 ioc_state, int timeout,
2338     int sleep_flag)
2339 {
2340         u32 count, cntdn;
2341         u32 current_state;
2342
2343         count = 0;
2344         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2345         do {
2346                 current_state = mpt2sas_base_get_iocstate(ioc, 1);
2347                 if (current_state == ioc_state)
2348                         return 0;
2349                 if (count && current_state == MPI2_IOC_STATE_FAULT)
2350                         break;
2351                 if (sleep_flag == CAN_SLEEP)
2352                         msleep(1);
2353                 else
2354                         udelay(500);
2355                 count++;
2356         } while (--cntdn);
2357
2358         return current_state;
2359 }
2360
2361 /**
2362  * _base_wait_for_doorbell_int - waiting for controller interrupt(generated by
2363  * a write to the doorbell)
2364  * @ioc: per adapter object
2365  * @timeout: timeout in second
2366  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2367  *
2368  * Returns 0 for success, non-zero for failure.
2369  *
2370  * Notes: MPI2_HIS_IOC2SYS_DB_STATUS - set to one when IOC writes to doorbell.
2371  */
2372 static int
2373 _base_wait_for_doorbell_int(struct MPT2SAS_ADAPTER *ioc, int timeout,
2374     int sleep_flag)
2375 {
2376         u32 cntdn, count;
2377         u32 int_status;
2378
2379         count = 0;
2380         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2381         do {
2382                 int_status = readl(&ioc->chip->HostInterruptStatus);
2383                 if (int_status & MPI2_HIS_IOC2SYS_DB_STATUS) {
2384                         dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2385                             "successfull count(%d), timeout(%d)\n", ioc->name,
2386                             __func__, count, timeout));
2387                         return 0;
2388                 }
2389                 if (sleep_flag == CAN_SLEEP)
2390                         msleep(1);
2391                 else
2392                         udelay(500);
2393                 count++;
2394         } while (--cntdn);
2395
2396         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2397             "int_status(%x)!\n", ioc->name, __func__, count, int_status);
2398         return -EFAULT;
2399 }
2400
2401 /**
2402  * _base_wait_for_doorbell_ack - waiting for controller to read the doorbell.
2403  * @ioc: per adapter object
2404  * @timeout: timeout in second
2405  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2406  *
2407  * Returns 0 for success, non-zero for failure.
2408  *
2409  * Notes: MPI2_HIS_SYS2IOC_DB_STATUS - set to one when host writes to
2410  * doorbell.
2411  */
2412 static int
2413 _base_wait_for_doorbell_ack(struct MPT2SAS_ADAPTER *ioc, int timeout,
2414     int sleep_flag)
2415 {
2416         u32 cntdn, count;
2417         u32 int_status;
2418         u32 doorbell;
2419
2420         count = 0;
2421         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2422         do {
2423                 int_status = readl(&ioc->chip->HostInterruptStatus);
2424                 if (!(int_status & MPI2_HIS_SYS2IOC_DB_STATUS)) {
2425                         dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2426                             "successfull count(%d), timeout(%d)\n", ioc->name,
2427                             __func__, count, timeout));
2428                         return 0;
2429                 } else if (int_status & MPI2_HIS_IOC2SYS_DB_STATUS) {
2430                         doorbell = readl(&ioc->chip->Doorbell);
2431                         if ((doorbell & MPI2_IOC_STATE_MASK) ==
2432                             MPI2_IOC_STATE_FAULT) {
2433                                 mpt2sas_base_fault_info(ioc , doorbell);
2434                                 return -EFAULT;
2435                         }
2436                 } else if (int_status == 0xFFFFFFFF)
2437                         goto out;
2438
2439                 if (sleep_flag == CAN_SLEEP)
2440                         msleep(1);
2441                 else
2442                         udelay(500);
2443                 count++;
2444         } while (--cntdn);
2445
2446  out:
2447         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2448             "int_status(%x)!\n", ioc->name, __func__, count, int_status);
2449         return -EFAULT;
2450 }
2451
2452 /**
2453  * _base_wait_for_doorbell_not_used - waiting for doorbell to not be in use
2454  * @ioc: per adapter object
2455  * @timeout: timeout in second
2456  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2457  *
2458  * Returns 0 for success, non-zero for failure.
2459  *
2460  */
2461 static int
2462 _base_wait_for_doorbell_not_used(struct MPT2SAS_ADAPTER *ioc, int timeout,
2463     int sleep_flag)
2464 {
2465         u32 cntdn, count;
2466         u32 doorbell_reg;
2467
2468         count = 0;
2469         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2470         do {
2471                 doorbell_reg = readl(&ioc->chip->Doorbell);
2472                 if (!(doorbell_reg & MPI2_DOORBELL_USED)) {
2473                         dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
2474                             "successfull count(%d), timeout(%d)\n", ioc->name,
2475                             __func__, count, timeout));
2476                         return 0;
2477                 }
2478                 if (sleep_flag == CAN_SLEEP)
2479                         msleep(1);
2480                 else
2481                         udelay(500);
2482                 count++;
2483         } while (--cntdn);
2484
2485         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2486             "doorbell_reg(%x)!\n", ioc->name, __func__, count, doorbell_reg);
2487         return -EFAULT;
2488 }
2489
2490 /**
2491  * _base_send_ioc_reset - send doorbell reset
2492  * @ioc: per adapter object
2493  * @reset_type: currently only supports: MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET
2494  * @timeout: timeout in second
2495  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2496  *
2497  * Returns 0 for success, non-zero for failure.
2498  */
2499 static int
2500 _base_send_ioc_reset(struct MPT2SAS_ADAPTER *ioc, u8 reset_type, int timeout,
2501     int sleep_flag)
2502 {
2503         u32 ioc_state;
2504         int r = 0;
2505
2506         if (reset_type != MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET) {
2507                 printk(MPT2SAS_ERR_FMT "%s: unknown reset_type\n",
2508                     ioc->name, __func__);
2509                 return -EFAULT;
2510         }
2511
2512         if (!(ioc->facts.IOCCapabilities &
2513            MPI2_IOCFACTS_CAPABILITY_EVENT_REPLAY))
2514                 return -EFAULT;
2515
2516         printk(MPT2SAS_INFO_FMT "sending message unit reset !!\n", ioc->name);
2517
2518         writel(reset_type << MPI2_DOORBELL_FUNCTION_SHIFT,
2519             &ioc->chip->Doorbell);
2520         if ((_base_wait_for_doorbell_ack(ioc, 15, sleep_flag))) {
2521                 r = -EFAULT;
2522                 goto out;
2523         }
2524         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_READY,
2525             timeout, sleep_flag);
2526         if (ioc_state) {
2527                 printk(MPT2SAS_ERR_FMT "%s: failed going to ready state "
2528                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
2529                 r = -EFAULT;
2530                 goto out;
2531         }
2532  out:
2533         printk(MPT2SAS_INFO_FMT "message unit reset: %s\n",
2534             ioc->name, ((r == 0) ? "SUCCESS" : "FAILED"));
2535         return r;
2536 }
2537
2538 /**
2539  * _base_handshake_req_reply_wait - send request thru doorbell interface
2540  * @ioc: per adapter object
2541  * @request_bytes: request length
2542  * @request: pointer having request payload
2543  * @reply_bytes: reply length
2544  * @reply: pointer to reply payload
2545  * @timeout: timeout in second
2546  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2547  *
2548  * Returns 0 for success, non-zero for failure.
2549  */
2550 static int
2551 _base_handshake_req_reply_wait(struct MPT2SAS_ADAPTER *ioc, int request_bytes,
2552     u32 *request, int reply_bytes, u16 *reply, int timeout, int sleep_flag)
2553 {
2554         MPI2DefaultReply_t *default_reply = (MPI2DefaultReply_t *)reply;
2555         int i;
2556         u8 failed;
2557         u16 dummy;
2558         u32 *mfp;
2559
2560         /* make sure doorbell is not in use */
2561         if ((readl(&ioc->chip->Doorbell) & MPI2_DOORBELL_USED)) {
2562                 printk(MPT2SAS_ERR_FMT "doorbell is in use "
2563                     " (line=%d)\n", ioc->name, __LINE__);
2564                 return -EFAULT;
2565         }
2566
2567         /* clear pending doorbell interrupts from previous state changes */
2568         if (readl(&ioc->chip->HostInterruptStatus) &
2569             MPI2_HIS_IOC2SYS_DB_STATUS)
2570                 writel(0, &ioc->chip->HostInterruptStatus);
2571
2572         /* send message to ioc */
2573         writel(((MPI2_FUNCTION_HANDSHAKE<<MPI2_DOORBELL_FUNCTION_SHIFT) |
2574             ((request_bytes/4)<<MPI2_DOORBELL_ADD_DWORDS_SHIFT)),
2575             &ioc->chip->Doorbell);
2576
2577         if ((_base_wait_for_doorbell_int(ioc, 5, NO_SLEEP))) {
2578                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2579                    "int failed (line=%d)\n", ioc->name, __LINE__);
2580                 return -EFAULT;
2581         }
2582         writel(0, &ioc->chip->HostInterruptStatus);
2583
2584         if ((_base_wait_for_doorbell_ack(ioc, 5, sleep_flag))) {
2585                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2586                     "ack failed (line=%d)\n", ioc->name, __LINE__);
2587                 return -EFAULT;
2588         }
2589
2590         /* send message 32-bits at a time */
2591         for (i = 0, failed = 0; i < request_bytes/4 && !failed; i++) {
2592                 writel(cpu_to_le32(request[i]), &ioc->chip->Doorbell);
2593                 if ((_base_wait_for_doorbell_ack(ioc, 5, sleep_flag)))
2594                         failed = 1;
2595         }
2596
2597         if (failed) {
2598                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2599                     "sending request failed (line=%d)\n", ioc->name, __LINE__);
2600                 return -EFAULT;
2601         }
2602
2603         /* now wait for the reply */
2604         if ((_base_wait_for_doorbell_int(ioc, timeout, sleep_flag))) {
2605                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2606                    "int failed (line=%d)\n", ioc->name, __LINE__);
2607                 return -EFAULT;
2608         }
2609
2610         /* read the first two 16-bits, it gives the total length of the reply */
2611         reply[0] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2612             & MPI2_DOORBELL_DATA_MASK);
2613         writel(0, &ioc->chip->HostInterruptStatus);
2614         if ((_base_wait_for_doorbell_int(ioc, 5, sleep_flag))) {
2615                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2616                    "int failed (line=%d)\n", ioc->name, __LINE__);
2617                 return -EFAULT;
2618         }
2619         reply[1] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2620             & MPI2_DOORBELL_DATA_MASK);
2621         writel(0, &ioc->chip->HostInterruptStatus);
2622
2623         for (i = 2; i < default_reply->MsgLength * 2; i++)  {
2624                 if ((_base_wait_for_doorbell_int(ioc, 5, sleep_flag))) {
2625                         printk(MPT2SAS_ERR_FMT "doorbell "
2626                             "handshake int failed (line=%d)\n", ioc->name,
2627                             __LINE__);
2628                         return -EFAULT;
2629                 }
2630                 if (i >=  reply_bytes/2) /* overflow case */
2631                         dummy = readl(&ioc->chip->Doorbell);
2632                 else
2633                         reply[i] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2634                             & MPI2_DOORBELL_DATA_MASK);
2635                 writel(0, &ioc->chip->HostInterruptStatus);
2636         }
2637
2638         _base_wait_for_doorbell_int(ioc, 5, sleep_flag);
2639         if (_base_wait_for_doorbell_not_used(ioc, 5, sleep_flag) != 0) {
2640                 dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "doorbell is in use "
2641                     " (line=%d)\n", ioc->name, __LINE__));
2642         }
2643         writel(0, &ioc->chip->HostInterruptStatus);
2644
2645         if (ioc->logging_level & MPT_DEBUG_INIT) {
2646                 mfp = (u32 *)reply;
2647                 printk(KERN_INFO "\toffset:data\n");
2648                 for (i = 0; i < reply_bytes/4; i++)
2649                         printk(KERN_INFO "\t[0x%02x]:%08x\n", i*4,
2650                             le32_to_cpu(mfp[i]));
2651         }
2652         return 0;
2653 }
2654
2655 /**
2656  * mpt2sas_base_sas_iounit_control - send sas iounit control to FW
2657  * @ioc: per adapter object
2658  * @mpi_reply: the reply payload from FW
2659  * @mpi_request: the request payload sent to FW
2660  *
2661  * The SAS IO Unit Control Request message allows the host to perform low-level
2662  * operations, such as resets on the PHYs of the IO Unit, also allows the host
2663  * to obtain the IOC assigned device handles for a device if it has other
2664  * identifying information about the device, in addition allows the host to
2665  * remove IOC resources associated with the device.
2666  *
2667  * Returns 0 for success, non-zero for failure.
2668  */
2669 int
2670 mpt2sas_base_sas_iounit_control(struct MPT2SAS_ADAPTER *ioc,
2671     Mpi2SasIoUnitControlReply_t *mpi_reply,
2672     Mpi2SasIoUnitControlRequest_t *mpi_request)
2673 {
2674         u16 smid;
2675         u32 ioc_state;
2676         unsigned long timeleft;
2677         u8 issue_reset;
2678         int rc;
2679         void *request;
2680         u16 wait_state_count;
2681
2682         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
2683             __func__));
2684
2685         mutex_lock(&ioc->base_cmds.mutex);
2686
2687         if (ioc->base_cmds.status != MPT2_CMD_NOT_USED) {
2688                 printk(MPT2SAS_ERR_FMT "%s: base_cmd in use\n",
2689                     ioc->name, __func__);
2690                 rc = -EAGAIN;
2691                 goto out;
2692         }
2693
2694         wait_state_count = 0;
2695         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2696         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2697                 if (wait_state_count++ == 10) {
2698                         printk(MPT2SAS_ERR_FMT
2699                             "%s: failed due to ioc not operational\n",
2700                             ioc->name, __func__);
2701                         rc = -EFAULT;
2702                         goto out;
2703                 }
2704                 ssleep(1);
2705                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2706                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
2707                     "operational state(count=%d)\n", ioc->name,
2708                     __func__, wait_state_count);
2709         }
2710
2711         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2712         if (!smid) {
2713                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2714                     ioc->name, __func__);
2715                 rc = -EAGAIN;
2716                 goto out;
2717         }
2718
2719         rc = 0;
2720         ioc->base_cmds.status = MPT2_CMD_PENDING;
2721         request = mpt2sas_base_get_msg_frame(ioc, smid);
2722         ioc->base_cmds.smid = smid;
2723         memcpy(request, mpi_request, sizeof(Mpi2SasIoUnitControlRequest_t));
2724         if (mpi_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET ||
2725             mpi_request->Operation == MPI2_SAS_OP_PHY_LINK_RESET)
2726                 ioc->ioc_link_reset_in_progress = 1;
2727         mpt2sas_base_put_smid_default(ioc, smid);
2728         init_completion(&ioc->base_cmds.done);
2729         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
2730             msecs_to_jiffies(10000));
2731         if ((mpi_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET ||
2732             mpi_request->Operation == MPI2_SAS_OP_PHY_LINK_RESET) &&
2733             ioc->ioc_link_reset_in_progress)
2734                 ioc->ioc_link_reset_in_progress = 0;
2735         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2736                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2737                     ioc->name, __func__);
2738                 _debug_dump_mf(mpi_request,
2739                     sizeof(Mpi2SasIoUnitControlRequest_t)/4);
2740                 if (!(ioc->base_cmds.status & MPT2_CMD_RESET))
2741                         issue_reset = 1;
2742                 goto issue_host_reset;
2743         }
2744         if (ioc->base_cmds.status & MPT2_CMD_REPLY_VALID)
2745                 memcpy(mpi_reply, ioc->base_cmds.reply,
2746                     sizeof(Mpi2SasIoUnitControlReply_t));
2747         else
2748                 memset(mpi_reply, 0, sizeof(Mpi2SasIoUnitControlReply_t));
2749         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2750         goto out;
2751
2752  issue_host_reset:
2753         if (issue_reset)
2754                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2755                     FORCE_BIG_HAMMER);
2756         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2757         rc = -EFAULT;
2758  out:
2759         mutex_unlock(&ioc->base_cmds.mutex);
2760         return rc;
2761 }
2762
2763
2764 /**
2765  * mpt2sas_base_scsi_enclosure_processor - sending request to sep device
2766  * @ioc: per adapter object
2767  * @mpi_reply: the reply payload from FW
2768  * @mpi_request: the request payload sent to FW
2769  *
2770  * The SCSI Enclosure Processor request message causes the IOC to
2771  * communicate with SES devices to control LED status signals.
2772  *
2773  * Returns 0 for success, non-zero for failure.
2774  */
2775 int
2776 mpt2sas_base_scsi_enclosure_processor(struct MPT2SAS_ADAPTER *ioc,
2777     Mpi2SepReply_t *mpi_reply, Mpi2SepRequest_t *mpi_request)
2778 {
2779         u16 smid;
2780         u32 ioc_state;
2781         unsigned long timeleft;
2782         u8 issue_reset;
2783         int rc;
2784         void *request;
2785         u16 wait_state_count;
2786
2787         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
2788             __func__));
2789
2790         mutex_lock(&ioc->base_cmds.mutex);
2791
2792         if (ioc->base_cmds.status != MPT2_CMD_NOT_USED) {
2793                 printk(MPT2SAS_ERR_FMT "%s: base_cmd in use\n",
2794                     ioc->name, __func__);
2795                 rc = -EAGAIN;
2796                 goto out;
2797         }
2798
2799         wait_state_count = 0;
2800         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2801         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2802                 if (wait_state_count++ == 10) {
2803                         printk(MPT2SAS_ERR_FMT
2804                             "%s: failed due to ioc not operational\n",
2805                             ioc->name, __func__);
2806                         rc = -EFAULT;
2807                         goto out;
2808                 }
2809                 ssleep(1);
2810                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2811                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
2812                     "operational state(count=%d)\n", ioc->name,
2813                     __func__, wait_state_count);
2814         }
2815
2816         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2817         if (!smid) {
2818                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2819                     ioc->name, __func__);
2820                 rc = -EAGAIN;
2821                 goto out;
2822         }
2823
2824         rc = 0;
2825         ioc->base_cmds.status = MPT2_CMD_PENDING;
2826         request = mpt2sas_base_get_msg_frame(ioc, smid);
2827         ioc->base_cmds.smid = smid;
2828         memcpy(request, mpi_request, sizeof(Mpi2SepReply_t));
2829         mpt2sas_base_put_smid_default(ioc, smid);
2830         init_completion(&ioc->base_cmds.done);
2831         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
2832             msecs_to_jiffies(10000));
2833         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2834                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2835                     ioc->name, __func__);
2836                 _debug_dump_mf(mpi_request,
2837                     sizeof(Mpi2SepRequest_t)/4);
2838                 if (!(ioc->base_cmds.status & MPT2_CMD_RESET))
2839                         issue_reset = 1;
2840                 goto issue_host_reset;
2841         }
2842         if (ioc->base_cmds.status & MPT2_CMD_REPLY_VALID)
2843                 memcpy(mpi_reply, ioc->base_cmds.reply,
2844                     sizeof(Mpi2SepReply_t));
2845         else
2846                 memset(mpi_reply, 0, sizeof(Mpi2SepReply_t));
2847         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2848         goto out;
2849
2850  issue_host_reset:
2851         if (issue_reset)
2852                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2853                     FORCE_BIG_HAMMER);
2854         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2855         rc = -EFAULT;
2856  out:
2857         mutex_unlock(&ioc->base_cmds.mutex);
2858         return rc;
2859 }
2860
2861 /**
2862  * _base_get_port_facts - obtain port facts reply and save in ioc
2863  * @ioc: per adapter object
2864  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2865  *
2866  * Returns 0 for success, non-zero for failure.
2867  */
2868 static int
2869 _base_get_port_facts(struct MPT2SAS_ADAPTER *ioc, int port, int sleep_flag)
2870 {
2871         Mpi2PortFactsRequest_t mpi_request;
2872         Mpi2PortFactsReply_t mpi_reply, *pfacts;
2873         int mpi_reply_sz, mpi_request_sz, r;
2874
2875         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
2876             __func__));
2877
2878         mpi_reply_sz = sizeof(Mpi2PortFactsReply_t);
2879         mpi_request_sz = sizeof(Mpi2PortFactsRequest_t);
2880         memset(&mpi_request, 0, mpi_request_sz);
2881         mpi_request.Function = MPI2_FUNCTION_PORT_FACTS;
2882         mpi_request.PortNumber = port;
2883         r = _base_handshake_req_reply_wait(ioc, mpi_request_sz,
2884             (u32 *)&mpi_request, mpi_reply_sz, (u16 *)&mpi_reply, 5, CAN_SLEEP);
2885
2886         if (r != 0) {
2887                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
2888                     ioc->name, __func__, r);
2889                 return r;
2890         }
2891
2892         pfacts = &ioc->pfacts[port];
2893         memset(pfacts, 0, sizeof(Mpi2PortFactsReply_t));
2894         pfacts->PortNumber = mpi_reply.PortNumber;
2895         pfacts->VP_ID = mpi_reply.VP_ID;
2896         pfacts->VF_ID = mpi_reply.VF_ID;
2897         pfacts->MaxPostedCmdBuffers =
2898             le16_to_cpu(mpi_reply.MaxPostedCmdBuffers);
2899
2900         return 0;
2901 }
2902
2903 /**
2904  * _base_get_ioc_facts - obtain ioc facts reply and save in ioc
2905  * @ioc: per adapter object
2906  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2907  *
2908  * Returns 0 for success, non-zero for failure.
2909  */
2910 static int
2911 _base_get_ioc_facts(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
2912 {
2913         Mpi2IOCFactsRequest_t mpi_request;
2914         Mpi2IOCFactsReply_t mpi_reply, *facts;
2915         int mpi_reply_sz, mpi_request_sz, r;
2916
2917         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
2918             __func__));
2919
2920         mpi_reply_sz = sizeof(Mpi2IOCFactsReply_t);
2921         mpi_request_sz = sizeof(Mpi2IOCFactsRequest_t);
2922         memset(&mpi_request, 0, mpi_request_sz);
2923         mpi_request.Function = MPI2_FUNCTION_IOC_FACTS;
2924         r = _base_handshake_req_reply_wait(ioc, mpi_request_sz,
2925             (u32 *)&mpi_request, mpi_reply_sz, (u16 *)&mpi_reply, 5, CAN_SLEEP);
2926
2927         if (r != 0) {
2928                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
2929                     ioc->name, __func__, r);
2930                 return r;
2931         }
2932
2933         facts = &ioc->facts;
2934         memset(facts, 0, sizeof(Mpi2IOCFactsReply_t));
2935         facts->MsgVersion = le16_to_cpu(mpi_reply.MsgVersion);
2936         facts->HeaderVersion = le16_to_cpu(mpi_reply.HeaderVersion);
2937         facts->VP_ID = mpi_reply.VP_ID;
2938         facts->VF_ID = mpi_reply.VF_ID;
2939         facts->IOCExceptions = le16_to_cpu(mpi_reply.IOCExceptions);
2940         facts->MaxChainDepth = mpi_reply.MaxChainDepth;
2941         facts->WhoInit = mpi_reply.WhoInit;
2942         facts->NumberOfPorts = mpi_reply.NumberOfPorts;
2943         facts->RequestCredit = le16_to_cpu(mpi_reply.RequestCredit);
2944         facts->MaxReplyDescriptorPostQueueDepth =
2945             le16_to_cpu(mpi_reply.MaxReplyDescriptorPostQueueDepth);
2946         facts->ProductID = le16_to_cpu(mpi_reply.ProductID);
2947         facts->IOCCapabilities = le32_to_cpu(mpi_reply.IOCCapabilities);
2948         if ((facts->IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID))
2949                 ioc->ir_firmware = 1;
2950         facts->FWVersion.Word = le32_to_cpu(mpi_reply.FWVersion.Word);
2951         facts->IOCRequestFrameSize =
2952             le16_to_cpu(mpi_reply.IOCRequestFrameSize);
2953         facts->MaxInitiators = le16_to_cpu(mpi_reply.MaxInitiators);
2954         facts->MaxTargets = le16_to_cpu(mpi_reply.MaxTargets);
2955         ioc->shost->max_id = -1;
2956         facts->MaxSasExpanders = le16_to_cpu(mpi_reply.MaxSasExpanders);
2957         facts->MaxEnclosures = le16_to_cpu(mpi_reply.MaxEnclosures);
2958         facts->ProtocolFlags = le16_to_cpu(mpi_reply.ProtocolFlags);
2959         facts->HighPriorityCredit =
2960             le16_to_cpu(mpi_reply.HighPriorityCredit);
2961         facts->ReplyFrameSize = mpi_reply.ReplyFrameSize;
2962         facts->MaxDevHandle = le16_to_cpu(mpi_reply.MaxDevHandle);
2963
2964         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "hba queue depth(%d), "
2965             "max chains per io(%d)\n", ioc->name, facts->RequestCredit,
2966             facts->MaxChainDepth));
2967         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request frame size(%d), "
2968             "reply frame size(%d)\n", ioc->name,
2969             facts->IOCRequestFrameSize * 4, facts->ReplyFrameSize * 4));
2970         return 0;
2971 }
2972
2973 /**
2974  * _base_send_ioc_init - send ioc_init to firmware
2975  * @ioc: per adapter object
2976  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2977  *
2978  * Returns 0 for success, non-zero for failure.
2979  */
2980 static int
2981 _base_send_ioc_init(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
2982 {
2983         Mpi2IOCInitRequest_t mpi_request;
2984         Mpi2IOCInitReply_t mpi_reply;
2985         int r;
2986         struct timeval current_time;
2987         u16 ioc_status;
2988
2989         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
2990             __func__));
2991
2992         memset(&mpi_request, 0, sizeof(Mpi2IOCInitRequest_t));
2993         mpi_request.Function = MPI2_FUNCTION_IOC_INIT;
2994         mpi_request.WhoInit = MPI2_WHOINIT_HOST_DRIVER;
2995         mpi_request.VF_ID = 0; /* TODO */
2996         mpi_request.VP_ID = 0;
2997         mpi_request.MsgVersion = cpu_to_le16(MPI2_VERSION);
2998         mpi_request.HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
2999
3000         /* In MPI Revision I (0xA), the SystemReplyFrameSize(offset 0x18) was
3001          * removed and made reserved.  For those with older firmware will need
3002          * this fix. It was decided that the Reply and Request frame sizes are
3003          * the same.
3004          */
3005         if ((ioc->facts.HeaderVersion >> 8) < 0xA) {
3006                 mpi_request.Reserved7 = cpu_to_le16(ioc->reply_sz);
3007 /*              mpi_request.SystemReplyFrameSize =
3008  *               cpu_to_le16(ioc->reply_sz);
3009  */
3010         }
3011
3012         mpi_request.SystemRequestFrameSize = cpu_to_le16(ioc->request_sz/4);
3013         mpi_request.ReplyDescriptorPostQueueDepth =
3014             cpu_to_le16(ioc->reply_post_queue_depth);
3015         mpi_request.ReplyFreeQueueDepth =
3016             cpu_to_le16(ioc->reply_free_queue_depth);
3017
3018 #if BITS_PER_LONG > 32
3019         mpi_request.SenseBufferAddressHigh =
3020             cpu_to_le32(ioc->sense_dma >> 32);
3021         mpi_request.SystemReplyAddressHigh =
3022             cpu_to_le32(ioc->reply_dma >> 32);
3023         mpi_request.SystemRequestFrameBaseAddress =
3024             cpu_to_le64(ioc->request_dma);
3025         mpi_request.ReplyFreeQueueAddress =
3026             cpu_to_le64(ioc->reply_free_dma);
3027         mpi_request.ReplyDescriptorPostQueueAddress =
3028             cpu_to_le64(ioc->reply_post_free_dma);
3029 #else
3030         mpi_request.SystemRequestFrameBaseAddress =
3031             cpu_to_le32(ioc->request_dma);
3032         mpi_request.ReplyFreeQueueAddress =
3033             cpu_to_le32(ioc->reply_free_dma);
3034         mpi_request.ReplyDescriptorPostQueueAddress =
3035             cpu_to_le32(ioc->reply_post_free_dma);
3036 #endif
3037
3038         /* This time stamp specifies number of milliseconds
3039          * since epoch ~ midnight January 1, 1970.
3040          */
3041         do_gettimeofday(&current_time);
3042         mpi_request.TimeStamp = cpu_to_le64((u64)current_time.tv_sec * 1000 +
3043             (current_time.tv_usec / 1000));
3044
3045         if (ioc->logging_level & MPT_DEBUG_INIT) {
3046                 u32 *mfp;
3047                 int i;
3048
3049                 mfp = (u32 *)&mpi_request;
3050                 printk(KERN_INFO "\toffset:data\n");
3051                 for (i = 0; i < sizeof(Mpi2IOCInitRequest_t)/4; i++)
3052                         printk(KERN_INFO "\t[0x%02x]:%08x\n", i*4,
3053                             le32_to_cpu(mfp[i]));
3054         }
3055
3056         r = _base_handshake_req_reply_wait(ioc,
3057             sizeof(Mpi2IOCInitRequest_t), (u32 *)&mpi_request,
3058             sizeof(Mpi2IOCInitReply_t), (u16 *)&mpi_reply, 10,
3059             sleep_flag);
3060
3061         if (r != 0) {
3062                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
3063                     ioc->name, __func__, r);
3064                 return r;
3065         }
3066
3067         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
3068         if (ioc_status != MPI2_IOCSTATUS_SUCCESS ||
3069             mpi_reply.IOCLogInfo) {
3070                 printk(MPT2SAS_ERR_FMT "%s: failed\n", ioc->name, __func__);
3071                 r = -EIO;
3072         }
3073
3074         return 0;
3075 }
3076
3077 /**
3078  * _base_send_port_enable - send port_enable(discovery stuff) to firmware
3079  * @ioc: per adapter object
3080  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3081  *
3082  * Returns 0 for success, non-zero for failure.
3083  */
3084 static int
3085 _base_send_port_enable(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3086 {
3087         Mpi2PortEnableRequest_t *mpi_request;
3088         u32 ioc_state;
3089         unsigned long timeleft;
3090         int r = 0;
3091         u16 smid;
3092
3093         printk(MPT2SAS_INFO_FMT "sending port enable !!\n", ioc->name);
3094
3095         if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
3096                 printk(MPT2SAS_ERR_FMT "%s: internal command already in use\n",
3097                     ioc->name, __func__);
3098                 return -EAGAIN;
3099         }
3100
3101         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
3102         if (!smid) {
3103                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
3104                     ioc->name, __func__);
3105                 return -EAGAIN;
3106         }
3107
3108         ioc->base_cmds.status = MPT2_CMD_PENDING;
3109         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
3110         ioc->base_cmds.smid = smid;
3111         memset(mpi_request, 0, sizeof(Mpi2PortEnableRequest_t));
3112         mpi_request->Function = MPI2_FUNCTION_PORT_ENABLE;
3113         mpi_request->VF_ID = 0; /* TODO */
3114         mpi_request->VP_ID = 0;
3115
3116         mpt2sas_base_put_smid_default(ioc, smid);
3117         init_completion(&ioc->base_cmds.done);
3118         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
3119             300*HZ);
3120         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
3121                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
3122                     ioc->name, __func__);
3123                 _debug_dump_mf(mpi_request,
3124                     sizeof(Mpi2PortEnableRequest_t)/4);
3125                 if (ioc->base_cmds.status & MPT2_CMD_RESET)
3126                         r = -EFAULT;
3127                 else
3128                         r = -ETIME;
3129                 goto out;
3130         } else
3131                 dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: complete\n",
3132                     ioc->name, __func__));
3133
3134         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_OPERATIONAL,
3135             60, sleep_flag);
3136         if (ioc_state) {
3137                 printk(MPT2SAS_ERR_FMT "%s: failed going to operational state "
3138                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
3139                 r = -EFAULT;
3140         }
3141  out:
3142         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
3143         printk(MPT2SAS_INFO_FMT "port enable: %s\n",
3144             ioc->name, ((r == 0) ? "SUCCESS" : "FAILED"));
3145         return r;
3146 }
3147
3148 /**
3149  * _base_unmask_events - turn on notification for this event
3150  * @ioc: per adapter object
3151  * @event: firmware event
3152  *
3153  * The mask is stored in ioc->event_masks.
3154  */
3155 static void
3156 _base_unmask_events(struct MPT2SAS_ADAPTER *ioc, u16 event)
3157 {
3158         u32 desired_event;
3159
3160         if (event >= 128)
3161                 return;
3162
3163         desired_event = (1 << (event % 32));
3164
3165         if (event < 32)
3166                 ioc->event_masks[0] &= ~desired_event;
3167         else if (event < 64)
3168                 ioc->event_masks[1] &= ~desired_event;
3169         else if (event < 96)
3170                 ioc->event_masks[2] &= ~desired_event;
3171         else if (event < 128)
3172                 ioc->event_masks[3] &= ~desired_event;
3173 }
3174
3175 /**
3176  * _base_event_notification - send event notification
3177  * @ioc: per adapter object
3178  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3179  *
3180  * Returns 0 for success, non-zero for failure.
3181  */
3182 static int
3183 _base_event_notification(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3184 {
3185         Mpi2EventNotificationRequest_t *mpi_request;
3186         unsigned long timeleft;
3187         u16 smid;
3188         int r = 0;
3189         int i;
3190
3191         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3192             __func__));
3193
3194         if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
3195                 printk(MPT2SAS_ERR_FMT "%s: internal command already in use\n",
3196                     ioc->name, __func__);
3197                 return -EAGAIN;
3198         }
3199
3200         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
3201         if (!smid) {
3202                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
3203                     ioc->name, __func__);
3204                 return -EAGAIN;
3205         }
3206         ioc->base_cmds.status = MPT2_CMD_PENDING;
3207         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
3208         ioc->base_cmds.smid = smid;
3209         memset(mpi_request, 0, sizeof(Mpi2EventNotificationRequest_t));
3210         mpi_request->Function = MPI2_FUNCTION_EVENT_NOTIFICATION;
3211         mpi_request->VF_ID = 0; /* TODO */
3212         mpi_request->VP_ID = 0;
3213         for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++)
3214                 mpi_request->EventMasks[i] =
3215                     cpu_to_le32(ioc->event_masks[i]);
3216         mpt2sas_base_put_smid_default(ioc, smid);
3217         init_completion(&ioc->base_cmds.done);
3218         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done, 30*HZ);
3219         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
3220                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
3221                     ioc->name, __func__);
3222                 _debug_dump_mf(mpi_request,
3223                     sizeof(Mpi2EventNotificationRequest_t)/4);
3224                 if (ioc->base_cmds.status & MPT2_CMD_RESET)
3225                         r = -EFAULT;
3226                 else
3227                         r = -ETIME;
3228         } else
3229                 dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: complete\n",
3230                     ioc->name, __func__));
3231         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
3232         return r;
3233 }
3234
3235 /**
3236  * mpt2sas_base_validate_event_type - validating event types
3237  * @ioc: per adapter object
3238  * @event: firmware event
3239  *
3240  * This will turn on firmware event notification when application
3241  * ask for that event. We don't mask events that are already enabled.
3242  */
3243 void
3244 mpt2sas_base_validate_event_type(struct MPT2SAS_ADAPTER *ioc, u32 *event_type)
3245 {
3246         int i, j;
3247         u32 event_mask, desired_event;
3248         u8 send_update_to_fw;
3249
3250         for (i = 0, send_update_to_fw = 0; i <
3251             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++) {
3252                 event_mask = ~event_type[i];
3253                 desired_event = 1;
3254                 for (j = 0; j < 32; j++) {
3255                         if (!(event_mask & desired_event) &&
3256                             (ioc->event_masks[i] & desired_event)) {
3257                                 ioc->event_masks[i] &= ~desired_event;
3258                                 send_update_to_fw = 1;
3259                         }
3260                         desired_event = (desired_event << 1);
3261                 }
3262         }
3263
3264         if (!send_update_to_fw)
3265                 return;
3266
3267         mutex_lock(&ioc->base_cmds.mutex);
3268         _base_event_notification(ioc, CAN_SLEEP);
3269         mutex_unlock(&ioc->base_cmds.mutex);
3270 }
3271
3272 /**
3273  * _base_diag_reset - the "big hammer" start of day reset
3274  * @ioc: per adapter object
3275  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3276  *
3277  * Returns 0 for success, non-zero for failure.
3278  */
3279 static int
3280 _base_diag_reset(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3281 {
3282         u32 host_diagnostic;
3283         u32 ioc_state;
3284         u32 count;
3285         u32 hcb_size;
3286
3287         printk(MPT2SAS_INFO_FMT "sending diag reset !!\n", ioc->name);
3288
3289         _base_save_msix_table(ioc);
3290
3291         drsprintk(ioc, printk(MPT2SAS_INFO_FMT "clear interrupts\n",
3292             ioc->name));
3293
3294         count = 0;
3295         do {
3296                 /* Write magic sequence to WriteSequence register
3297                  * Loop until in diagnostic mode
3298                  */
3299                 drsprintk(ioc, printk(MPT2SAS_INFO_FMT "write magic "
3300                     "sequence\n", ioc->name));
3301                 writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
3302                 writel(MPI2_WRSEQ_1ST_KEY_VALUE, &ioc->chip->WriteSequence);
3303                 writel(MPI2_WRSEQ_2ND_KEY_VALUE, &ioc->chip->WriteSequence);
3304                 writel(MPI2_WRSEQ_3RD_KEY_VALUE, &ioc->chip->WriteSequence);
3305                 writel(MPI2_WRSEQ_4TH_KEY_VALUE, &ioc->chip->WriteSequence);
3306                 writel(MPI2_WRSEQ_5TH_KEY_VALUE, &ioc->chip->WriteSequence);
3307                 writel(MPI2_WRSEQ_6TH_KEY_VALUE, &ioc->chip->WriteSequence);
3308
3309                 /* wait 100 msec */
3310                 if (sleep_flag == CAN_SLEEP)
3311                         msleep(100);
3312                 else
3313                         mdelay(100);
3314
3315                 if (count++ > 20)
3316                         goto out;
3317
3318                 host_diagnostic = readl(&ioc->chip->HostDiagnostic);
3319                 drsprintk(ioc, printk(MPT2SAS_INFO_FMT "wrote magic "
3320                     "sequence: count(%d), host_diagnostic(0x%08x)\n",
3321                     ioc->name, count, host_diagnostic));
3322
3323         } while ((host_diagnostic & MPI2_DIAG_DIAG_WRITE_ENABLE) == 0);
3324
3325         hcb_size = readl(&ioc->chip->HCBSize);
3326
3327         drsprintk(ioc, printk(MPT2SAS_INFO_FMT "diag reset: issued\n",
3328             ioc->name));
3329         writel(host_diagnostic | MPI2_DIAG_RESET_ADAPTER,
3330              &ioc->chip->HostDiagnostic);
3331
3332         /* don't access any registers for 50 milliseconds */
3333         msleep(50);
3334
3335         /* 300 second max wait */
3336         for (count = 0; count < 3000000 ; count++) {
3337
3338                 host_diagnostic = readl(&ioc->chip->HostDiagnostic);
3339
3340                 if (host_diagnostic == 0xFFFFFFFF)
3341                         goto out;
3342                 if (!(host_diagnostic & MPI2_DIAG_RESET_ADAPTER))
3343                         break;
3344
3345                 /* wait 100 msec */
3346                 if (sleep_flag == CAN_SLEEP)
3347                         msleep(1);
3348                 else
3349                         mdelay(1);
3350         }
3351
3352         if (host_diagnostic & MPI2_DIAG_HCB_MODE) {
3353
3354                 drsprintk(ioc, printk(MPT2SAS_INFO_FMT "restart the adapter "
3355                     "assuming the HCB Address points to good F/W\n",
3356                     ioc->name));
3357                 host_diagnostic &= ~MPI2_DIAG_BOOT_DEVICE_SELECT_MASK;
3358                 host_diagnostic |= MPI2_DIAG_BOOT_DEVICE_SELECT_HCDW;
3359                 writel(host_diagnostic, &ioc->chip->HostDiagnostic);
3360
3361                 drsprintk(ioc, printk(MPT2SAS_INFO_FMT
3362                     "re-enable the HCDW\n", ioc->name));
3363                 writel(hcb_size | MPI2_HCB_SIZE_HCB_ENABLE,
3364                     &ioc->chip->HCBSize);
3365         }
3366
3367         drsprintk(ioc, printk(MPT2SAS_INFO_FMT "restart the adapter\n",
3368             ioc->name));
3369         writel(host_diagnostic & ~MPI2_DIAG_HOLD_IOC_RESET,
3370             &ioc->chip->HostDiagnostic);
3371
3372         drsprintk(ioc, printk(MPT2SAS_INFO_FMT "disable writes to the "
3373             "diagnostic register\n", ioc->name));
3374         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
3375
3376         drsprintk(ioc, printk(MPT2SAS_INFO_FMT "Wait for FW to go to the "
3377             "READY state\n", ioc->name));
3378         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_READY, 20,
3379             sleep_flag);
3380         if (ioc_state) {
3381                 printk(MPT2SAS_ERR_FMT "%s: failed going to ready state "
3382                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
3383                 goto out;
3384         }
3385
3386         _base_restore_msix_table(ioc);
3387         printk(MPT2SAS_INFO_FMT "diag reset: SUCCESS\n", ioc->name);
3388         return 0;
3389
3390  out:
3391         printk(MPT2SAS_ERR_FMT "diag reset: FAILED\n", ioc->name);
3392         return -EFAULT;
3393 }
3394
3395 /**
3396  * _base_make_ioc_ready - put controller in READY state
3397  * @ioc: per adapter object
3398  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3399  * @type: FORCE_BIG_HAMMER or SOFT_RESET
3400  *
3401  * Returns 0 for success, non-zero for failure.
3402  */
3403 static int
3404 _base_make_ioc_ready(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
3405     enum reset_type type)
3406 {
3407         u32 ioc_state;
3408         int rc;
3409
3410         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3411             __func__));
3412
3413         if (ioc->pci_error_recovery)
3414                 return 0;
3415
3416         ioc_state = mpt2sas_base_get_iocstate(ioc, 0);
3417         dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: ioc_state(0x%08x)\n",
3418             ioc->name, __func__, ioc_state));
3419
3420         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_READY)
3421                 return 0;
3422
3423         if (ioc_state & MPI2_DOORBELL_USED) {
3424                 dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "unexpected doorbell "
3425                     "active!\n", ioc->name));
3426                 goto issue_diag_reset;
3427         }
3428
3429         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
3430                 mpt2sas_base_fault_info(ioc, ioc_state &
3431                     MPI2_DOORBELL_DATA_MASK);
3432                 goto issue_diag_reset;
3433         }
3434
3435         if (type == FORCE_BIG_HAMMER)
3436                 goto issue_diag_reset;
3437
3438         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_OPERATIONAL)
3439                 if (!(_base_send_ioc_reset(ioc,
3440                     MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET, 15, CAN_SLEEP))) {
3441                         ioc->ioc_reset_count++;
3442                         return 0;
3443         }
3444
3445  issue_diag_reset:
3446         rc = _base_diag_reset(ioc, CAN_SLEEP);
3447         ioc->ioc_reset_count++;
3448         return rc;
3449 }
3450
3451 /**
3452  * _base_make_ioc_operational - put controller in OPERATIONAL state
3453  * @ioc: per adapter object
3454  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3455  *
3456  * Returns 0 for success, non-zero for failure.
3457  */
3458 static int
3459 _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3460 {
3461         int r, i;
3462         unsigned long   flags;
3463         u32 reply_address;
3464         u16 smid;
3465         struct _tr_list *delayed_tr, *delayed_tr_next;
3466
3467         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3468             __func__));
3469
3470         /* clean the delayed target reset list */
3471         list_for_each_entry_safe(delayed_tr, delayed_tr_next,
3472             &ioc->delayed_tr_list, list) {
3473                 list_del(&delayed_tr->list);
3474                 kfree(delayed_tr);
3475         }
3476
3477         list_for_each_entry_safe(delayed_tr, delayed_tr_next,
3478             &ioc->delayed_tr_volume_list, list) {
3479                 list_del(&delayed_tr->list);
3480                 kfree(delayed_tr);
3481         }
3482
3483         /* initialize the scsi lookup free list */
3484         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
3485         INIT_LIST_HEAD(&ioc->free_list);
3486         smid = 1;
3487         for (i = 0; i < ioc->scsiio_depth; i++, smid++) {
3488                 ioc->scsi_lookup[i].cb_idx = 0xFF;
3489                 ioc->scsi_lookup[i].smid = smid;
3490                 ioc->scsi_lookup[i].scmd = NULL;
3491                 list_add_tail(&ioc->scsi_lookup[i].tracker_list,
3492                     &ioc->free_list);
3493         }
3494
3495         /* hi-priority queue */
3496         INIT_LIST_HEAD(&ioc->hpr_free_list);
3497         smid = ioc->hi_priority_smid;
3498         for (i = 0; i < ioc->hi_priority_depth; i++, smid++) {
3499                 ioc->hpr_lookup[i].cb_idx = 0xFF;
3500                 ioc->hpr_lookup[i].smid = smid;
3501                 list_add_tail(&ioc->hpr_lookup[i].tracker_list,
3502                     &ioc->hpr_free_list);
3503         }
3504
3505         /* internal queue */
3506         INIT_LIST_HEAD(&ioc->internal_free_list);
3507         smid = ioc->internal_smid;
3508         for (i = 0; i < ioc->internal_depth; i++, smid++) {
3509                 ioc->internal_lookup[i].cb_idx = 0xFF;
3510                 ioc->internal_lookup[i].smid = smid;
3511                 list_add_tail(&ioc->internal_lookup[i].tracker_list,
3512                     &ioc->internal_free_list);
3513         }
3514         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
3515
3516         /* initialize Reply Free Queue */
3517         for (i = 0, reply_address = (u32)ioc->reply_dma ;
3518             i < ioc->reply_free_queue_depth ; i++, reply_address +=
3519             ioc->reply_sz)
3520                 ioc->reply_free[i] = cpu_to_le32(reply_address);
3521
3522         /* initialize Reply Post Free Queue */
3523         for (i = 0; i < ioc->reply_post_queue_depth; i++)
3524                 ioc->reply_post_free[i].Words = ULLONG_MAX;
3525
3526         r = _base_send_ioc_init(ioc, sleep_flag);
3527         if (r)
3528                 return r;
3529
3530         /* initialize the index's */
3531         ioc->reply_free_host_index = ioc->reply_free_queue_depth - 1;
3532         ioc->reply_post_host_index = 0;
3533         writel(ioc->reply_free_host_index, &ioc->chip->ReplyFreeHostIndex);
3534         writel(0, &ioc->chip->ReplyPostHostIndex);
3535
3536         _base_unmask_interrupts(ioc);
3537         r = _base_event_notification(ioc, sleep_flag);
3538         if (r)
3539                 return r;
3540
3541         if (sleep_flag == CAN_SLEEP)
3542                 _base_static_config_pages(ioc);
3543
3544         if (ioc->wait_for_port_enable_to_complete) {
3545                 if (diag_buffer_enable != 0)
3546                         mpt2sas_enable_diag_buffer(ioc, diag_buffer_enable);
3547                 if (disable_discovery > 0)
3548                         return r;
3549         }
3550
3551         r = _base_send_port_enable(ioc, sleep_flag);
3552         if (r)
3553                 return r;
3554
3555         return r;
3556 }
3557
3558 /**
3559  * mpt2sas_base_free_resources - free resources controller resources (io/irq/memap)
3560  * @ioc: per adapter object
3561  *
3562  * Return nothing.
3563  */
3564 void
3565 mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
3566 {
3567         struct pci_dev *pdev = ioc->pdev;
3568
3569         dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3570             __func__));
3571
3572         _base_mask_interrupts(ioc);
3573         ioc->shost_recovery = 1;
3574         _base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
3575         ioc->shost_recovery = 0;
3576         if (ioc->pci_irq) {
3577                 synchronize_irq(pdev->irq);
3578                 free_irq(ioc->pci_irq, ioc);
3579         }
3580         _base_disable_msix(ioc);
3581         if (ioc->chip_phys)
3582                 iounmap(ioc->chip);
3583         ioc->pci_irq = -1;
3584         ioc->chip_phys = 0;
3585         pci_release_selected_regions(ioc->pdev, ioc->bars);
3586         pci_disable_pcie_error_reporting(pdev);
3587         pci_disable_device(pdev);
3588         return;
3589 }
3590
3591 /**
3592  * mpt2sas_base_attach - attach controller instance
3593  * @ioc: per adapter object
3594  *
3595  * Returns 0 for success, non-zero for failure.
3596  */
3597 int
3598 mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
3599 {
3600         int r, i;
3601
3602         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3603             __func__));
3604
3605         r = mpt2sas_base_map_resources(ioc);
3606         if (r)
3607                 return r;
3608
3609         pci_set_drvdata(ioc->pdev, ioc->shost);
3610         r = _base_get_ioc_facts(ioc, CAN_SLEEP);
3611         if (r)
3612                 goto out_free_resources;
3613
3614         r = _base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
3615         if (r)
3616                 goto out_free_resources;
3617
3618         ioc->pfacts = kcalloc(ioc->facts.NumberOfPorts,
3619             sizeof(Mpi2PortFactsReply_t), GFP_KERNEL);
3620         if (!ioc->pfacts) {
3621                 r = -ENOMEM;
3622                 goto out_free_resources;
3623         }
3624
3625         for (i = 0 ; i < ioc->facts.NumberOfPorts; i++) {
3626                 r = _base_get_port_facts(ioc, i, CAN_SLEEP);
3627                 if (r)
3628                         goto out_free_resources;
3629         }
3630
3631         r = _base_allocate_memory_pools(ioc, CAN_SLEEP);
3632         if (r)
3633                 goto out_free_resources;
3634
3635         init_waitqueue_head(&ioc->reset_wq);
3636
3637         /* allocate memory pd handle bitmask list */
3638         ioc->pd_handles_sz = (ioc->facts.MaxDevHandle / 8);
3639         if (ioc->facts.MaxDevHandle % 8)
3640                 ioc->pd_handles_sz++;
3641         ioc->pd_handles = kzalloc(ioc->pd_handles_sz,
3642             GFP_KERNEL);
3643         if (!ioc->pd_handles) {
3644                 r = -ENOMEM;
3645                 goto out_free_resources;
3646         }
3647
3648         ioc->fwfault_debug = mpt2sas_fwfault_debug;
3649
3650         /* base internal command bits */
3651         mutex_init(&ioc->base_cmds.mutex);
3652         ioc->base_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3653         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
3654
3655         /* transport internal command bits */
3656         ioc->transport_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3657         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
3658         mutex_init(&ioc->transport_cmds.mutex);
3659
3660         /* scsih internal command bits */
3661         ioc->scsih_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3662         ioc->scsih_cmds.status = MPT2_CMD_NOT_USED;
3663         mutex_init(&ioc->scsih_cmds.mutex);
3664
3665         /* task management internal command bits */
3666         ioc->tm_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3667         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
3668         mutex_init(&ioc->tm_cmds.mutex);
3669
3670         /* config page internal command bits */
3671         ioc->config_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3672         ioc->config_cmds.status = MPT2_CMD_NOT_USED;
3673         mutex_init(&ioc->config_cmds.mutex);
3674
3675         /* ctl module internal command bits */
3676         ioc->ctl_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3677         ioc->ctl_cmds.sense = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
3678         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
3679         mutex_init(&ioc->ctl_cmds.mutex);
3680
3681         if (!ioc->base_cmds.reply || !ioc->transport_cmds.reply ||
3682             !ioc->scsih_cmds.reply || !ioc->tm_cmds.reply ||
3683             !ioc->config_cmds.reply || !ioc->ctl_cmds.reply ||
3684             !ioc->ctl_cmds.sense) {
3685                 r = -ENOMEM;
3686                 goto out_free_resources;
3687         }
3688
3689         if (!ioc->base_cmds.reply || !ioc->transport_cmds.reply ||
3690             !ioc->scsih_cmds.reply || !ioc->tm_cmds.reply ||
3691             !ioc->config_cmds.reply || !ioc->ctl_cmds.reply) {
3692                 r = -ENOMEM;
3693                 goto out_free_resources;
3694         }
3695
3696         init_completion(&ioc->shost_recovery_done);
3697
3698         for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++)
3699                 ioc->event_masks[i] = -1;
3700
3701         /* here we enable the events we care about */
3702         _base_unmask_events(ioc, MPI2_EVENT_SAS_DISCOVERY);
3703         _base_unmask_events(ioc, MPI2_EVENT_SAS_BROADCAST_PRIMITIVE);
3704         _base_unmask_events(ioc, MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST);
3705         _base_unmask_events(ioc, MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE);
3706         _base_unmask_events(ioc, MPI2_EVENT_SAS_ENCL_DEVICE_STATUS_CHANGE);
3707         _base_unmask_events(ioc, MPI2_EVENT_IR_CONFIGURATION_CHANGE_LIST);
3708         _base_unmask_events(ioc, MPI2_EVENT_IR_VOLUME);
3709         _base_unmask_events(ioc, MPI2_EVENT_IR_PHYSICAL_DISK);
3710         _base_unmask_events(ioc, MPI2_EVENT_IR_OPERATION_STATUS);
3711         _base_unmask_events(ioc, MPI2_EVENT_TASK_SET_FULL);
3712         _base_unmask_events(ioc, MPI2_EVENT_LOG_ENTRY_ADDED);
3713         r = _base_make_ioc_operational(ioc, CAN_SLEEP);
3714         if (r)
3715                 goto out_free_resources;
3716
3717         mpt2sas_base_start_watchdog(ioc);
3718         return 0;
3719
3720  out_free_resources:
3721
3722         ioc->remove_host = 1;
3723         mpt2sas_base_free_resources(ioc);
3724         _base_release_memory_pools(ioc);
3725         pci_set_drvdata(ioc->pdev, NULL);
3726         kfree(ioc->pd_handles);
3727         kfree(ioc->tm_cmds.reply);
3728         kfree(ioc->transport_cmds.reply);
3729         kfree(ioc->scsih_cmds.reply);
3730         kfree(ioc->config_cmds.reply);
3731         kfree(ioc->base_cmds.reply);
3732         kfree(ioc->ctl_cmds.reply);
3733         kfree(ioc->ctl_cmds.sense);
3734         kfree(ioc->pfacts);
3735         ioc->ctl_cmds.reply = NULL;
3736         ioc->base_cmds.reply = NULL;
3737         ioc->tm_cmds.reply = NULL;
3738         ioc->scsih_cmds.reply = NULL;
3739         ioc->transport_cmds.reply = NULL;
3740         ioc->config_cmds.reply = NULL;
3741         ioc->pfacts = NULL;
3742         return r;
3743 }
3744
3745
3746 /**
3747  * mpt2sas_base_detach - remove controller instance
3748  * @ioc: per adapter object
3749  *
3750  * Return nothing.
3751  */
3752 void
3753 mpt2sas_base_detach(struct MPT2SAS_ADAPTER *ioc)
3754 {
3755
3756         dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "%s\n", ioc->name,
3757             __func__));
3758
3759         mpt2sas_base_stop_watchdog(ioc);
3760         mpt2sas_base_free_resources(ioc);
3761         _base_release_memory_pools(ioc);
3762         pci_set_drvdata(ioc->pdev, NULL);
3763         kfree(ioc->pd_handles);
3764         kfree(ioc->pfacts);
3765         kfree(ioc->ctl_cmds.reply);
3766         kfree(ioc->ctl_cmds.sense);
3767         kfree(ioc->base_cmds.reply);
3768         kfree(ioc->tm_cmds.reply);
3769         kfree(ioc->transport_cmds.reply);
3770         kfree(ioc->scsih_cmds.reply);
3771         kfree(ioc->config_cmds.reply);
3772 }
3773
3774 /**
3775  * _base_reset_handler - reset callback handler (for base)
3776  * @ioc: per adapter object
3777  * @reset_phase: phase
3778  *
3779  * The handler for doing any required cleanup or initialization.
3780  *
3781  * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
3782  * MPT2_IOC_DONE_RESET
3783  *
3784  * Return nothing.
3785  */
3786 static void
3787 _base_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
3788 {
3789         switch (reset_phase) {
3790         case MPT2_IOC_PRE_RESET:
3791                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
3792                     "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
3793                 break;
3794         case MPT2_IOC_AFTER_RESET:
3795                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
3796                     "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
3797                 if (ioc->transport_cmds.status & MPT2_CMD_PENDING) {
3798                         ioc->transport_cmds.status |= MPT2_CMD_RESET;
3799                         mpt2sas_base_free_smid(ioc, ioc->transport_cmds.smid);
3800                         complete(&ioc->transport_cmds.done);
3801                 }
3802                 if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
3803                         ioc->base_cmds.status |= MPT2_CMD_RESET;
3804                         mpt2sas_base_free_smid(ioc, ioc->base_cmds.smid);
3805                         complete(&ioc->base_cmds.done);
3806                 }
3807                 if (ioc->config_cmds.status & MPT2_CMD_PENDING) {
3808                         ioc->config_cmds.status |= MPT2_CMD_RESET;
3809                         mpt2sas_base_free_smid(ioc, ioc->config_cmds.smid);
3810                         ioc->config_cmds.smid = USHRT_MAX;
3811                         complete(&ioc->config_cmds.done);
3812                 }
3813                 break;
3814         case MPT2_IOC_DONE_RESET:
3815                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: "
3816                     "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
3817                 break;
3818         }
3819         mpt2sas_scsih_reset_handler(ioc, reset_phase);
3820         mpt2sas_ctl_reset_handler(ioc, reset_phase);
3821 }
3822
3823 /**
3824  * _wait_for_commands_to_complete - reset controller
3825  * @ioc: Pointer to MPT_ADAPTER structure
3826  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3827  *
3828  * This function waiting(3s) for all pending commands to complete
3829  * prior to putting controller in reset.
3830  */
3831 static void
3832 _wait_for_commands_to_complete(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3833 {
3834         u32 ioc_state;
3835         unsigned long flags;
3836         u16 i;
3837
3838         ioc->pending_io_count = 0;
3839         if (sleep_flag != CAN_SLEEP)
3840                 return;
3841
3842         ioc_state = mpt2sas_base_get_iocstate(ioc, 0);
3843         if ((ioc_state & MPI2_IOC_STATE_MASK) != MPI2_IOC_STATE_OPERATIONAL)
3844                 return;
3845
3846         /* pending command count */
3847         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
3848         for (i = 0; i < ioc->scsiio_depth; i++)
3849                 if (ioc->scsi_lookup[i].cb_idx != 0xFF)
3850                         ioc->pending_io_count++;
3851         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
3852
3853         if (!ioc->pending_io_count)
3854                 return;
3855
3856         /* wait for pending commands to complete */
3857         wait_event_timeout(ioc->reset_wq, ioc->pending_io_count == 0, 10 * HZ);
3858 }
3859
3860 /**
3861  * mpt2sas_base_hard_reset_handler - reset controller
3862  * @ioc: Pointer to MPT_ADAPTER structure
3863  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3864  * @type: FORCE_BIG_HAMMER or SOFT_RESET
3865  *
3866  * Returns 0 for success, non-zero for failure.
3867  */
3868 int
3869 mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
3870     enum reset_type type)
3871 {
3872         int r;
3873         unsigned long flags;
3874
3875         dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: enter\n", ioc->name,
3876             __func__));
3877
3878         if (ioc->pci_error_recovery) {
3879                 printk(MPT2SAS_ERR_FMT "%s: pci error recovery reset\n",
3880                     ioc->name, __func__);
3881                 r = 0;
3882                 goto out;
3883         }
3884
3885         if (mpt2sas_fwfault_debug)
3886                 mpt2sas_halt_firmware(ioc);
3887
3888         /* TODO - What we really should be doing is pulling
3889          * out all the code associated with NO_SLEEP; its never used.
3890          * That is legacy code from mpt fusion driver, ported over.
3891          * I will leave this BUG_ON here for now till its been resolved.
3892          */
3893         BUG_ON(sleep_flag == NO_SLEEP);
3894
3895         /* wait for an active reset in progress to complete */
3896         if (!mutex_trylock(&ioc->reset_in_progress_mutex)) {
3897                 do {
3898                         ssleep(1);
3899                 } while (ioc->shost_recovery == 1);
3900                 dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit\n", ioc->name,
3901                     __func__));
3902                 return ioc->ioc_reset_in_progress_status;
3903         }
3904
3905         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3906         ioc->shost_recovery = 1;
3907         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3908
3909         _base_reset_handler(ioc, MPT2_IOC_PRE_RESET);
3910         _wait_for_commands_to_complete(ioc, sleep_flag);
3911         _base_mask_interrupts(ioc);
3912         r = _base_make_ioc_ready(ioc, sleep_flag, type);
3913         if (r)
3914                 goto out;
3915         _base_reset_handler(ioc, MPT2_IOC_AFTER_RESET);
3916         r = _base_make_ioc_operational(ioc, sleep_flag);
3917         if (!r)
3918                 _base_reset_handler(ioc, MPT2_IOC_DONE_RESET);
3919  out:
3920         dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: %s\n",
3921             ioc->name, __func__, ((r == 0) ? "SUCCESS" : "FAILED")));
3922
3923         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3924         ioc->ioc_reset_in_progress_status = r;
3925         ioc->shost_recovery = 0;
3926         complete(&ioc->shost_recovery_done);
3927         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3928         mutex_unlock(&ioc->reset_in_progress_mutex);
3929
3930         dtmprintk(ioc, printk(MPT2SAS_INFO_FMT "%s: exit\n", ioc->name,
3931             __func__));
3932         return r;
3933 }