git.oblomov.eu Git - linux-2.6/blob - 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) 2007-2008  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
  61 #include "mpt2sas_base.h"
  62
  63 static MPT_CALLBACK     mpt_callbacks[MPT_MAX_CALLBACKS];
  64
  65 #define FAULT_POLLING_INTERVAL 1000 /* in milliseconds */
  66 #define MPT2SAS_MAX_REQUEST_QUEUE 500 /* maximum controller queue depth */
  67
  68 static int max_queue_depth = -1;
  69 module_param(max_queue_depth, int, 0);
  70 MODULE_PARM_DESC(max_queue_depth, " max controller queue depth ");
  71
  72 static int max_sgl_entries = -1;
  73 module_param(max_sgl_entries, int, 0);
  74 MODULE_PARM_DESC(max_sgl_entries, " max sg entries ");
  75
  76 static int msix_disable = -1;
  77 module_param(msix_disable, int, 0);
  78 MODULE_PARM_DESC(msix_disable, " disable msix routed interrupts (default=0)");
  79
  80 /**
  81  * _base_fault_reset_work - workq handling ioc fault conditions
  82  * @work: input argument, used to derive ioc
  83  * Context: sleep.
  84  *
  85  * Return nothing.
  86  */
  87 static void
  88 _base_fault_reset_work(struct work_struct *work)
  89 {
  90         struct MPT2SAS_ADAPTER *ioc =
  91             container_of(work, struct MPT2SAS_ADAPTER, fault_reset_work.work);
  92         unsigned long    flags;
  93         u32 doorbell;
  94         int rc;
  95
  96         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
  97         if (ioc->ioc_reset_in_progress)
  98                 goto rearm_timer;
  99         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 100
 101         doorbell = mpt2sas_base_get_iocstate(ioc, 0);
 102         if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
 103                 rc = mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 104                     FORCE_BIG_HAMMER);
 105                 printk(MPT2SAS_WARN_FMT "%s: hard reset: %s\n", ioc->name,
 106                     __func__, (rc == 0) ? "success" : "failed");
 107                 doorbell = mpt2sas_base_get_iocstate(ioc, 0);
 108                 if ((doorbell & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT)
 109                         mpt2sas_base_fault_info(ioc, doorbell &
 110                             MPI2_DOORBELL_DATA_MASK);
 111         }
 112
 113         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
 114  rearm_timer:
 115         if (ioc->fault_reset_work_q)
 116                 queue_delayed_work(ioc->fault_reset_work_q,
 117                     &ioc->fault_reset_work,
 118                     msecs_to_jiffies(FAULT_POLLING_INTERVAL));
 119         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 120 }
 121
 122 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 123 /**
 124  * _base_sas_ioc_info - verbose translation of the ioc status
 125  * @ioc: pointer to scsi command object
 126  * @mpi_reply: reply mf payload returned from firmware
 127  * @request_hdr: request mf
 128  *
 129  * Return nothing.
 130  */
 131 static void
 132 _base_sas_ioc_info(struct MPT2SAS_ADAPTER *ioc, MPI2DefaultReply_t *mpi_reply,
 133      MPI2RequestHeader_t *request_hdr)
 134 {
 135         u16 ioc_status = le16_to_cpu(mpi_reply->IOCStatus) &
 136             MPI2_IOCSTATUS_MASK;
 137         char *desc = NULL;
 138         u16 frame_sz;
 139         char *func_str = NULL;
 140
 141         /* SCSI_IO, RAID_PASS are handled from _scsih_scsi_ioc_info */
 142         if (request_hdr->Function == MPI2_FUNCTION_SCSI_IO_REQUEST ||
 143             request_hdr->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH ||
 144             request_hdr->Function == MPI2_FUNCTION_EVENT_NOTIFICATION)
 145                 return;
 146
 147         switch (ioc_status) {
 148
 149 /****************************************************************************
 150 *  Common IOCStatus values for all replies
 151 ****************************************************************************/
 152
 153         case MPI2_IOCSTATUS_INVALID_FUNCTION:
 154                 desc = "invalid function";
 155                 break;
 156         case MPI2_IOCSTATUS_BUSY:
 157                 desc = "busy";
 158                 break;
 159         case MPI2_IOCSTATUS_INVALID_SGL:
 160                 desc = "invalid sgl";
 161                 break;
 162         case MPI2_IOCSTATUS_INTERNAL_ERROR:
 163                 desc = "internal error";
 164                 break;
 165         case MPI2_IOCSTATUS_INVALID_VPID:
 166                 desc = "invalid vpid";
 167                 break;
 168         case MPI2_IOCSTATUS_INSUFFICIENT_RESOURCES:
 169                 desc = "insufficient resources";
 170                 break;
 171         case MPI2_IOCSTATUS_INVALID_FIELD:
 172                 desc = "invalid field";
 173                 break;
 174         case MPI2_IOCSTATUS_INVALID_STATE:
 175                 desc = "invalid state";
 176                 break;
 177         case MPI2_IOCSTATUS_OP_STATE_NOT_SUPPORTED:
 178                 desc = "op state not supported";
 179                 break;
 180
 181 /****************************************************************************
 182 *  Config IOCStatus values
 183 ****************************************************************************/
 184
 185         case MPI2_IOCSTATUS_CONFIG_INVALID_ACTION:
 186                 desc = "config invalid action";
 187                 break;
 188         case MPI2_IOCSTATUS_CONFIG_INVALID_TYPE:
 189                 desc = "config invalid type";
 190                 break;
 191         case MPI2_IOCSTATUS_CONFIG_INVALID_PAGE:
 192                 desc = "config invalid page";
 193                 break;
 194         case MPI2_IOCSTATUS_CONFIG_INVALID_DATA:
 195                 desc = "config invalid data";
 196                 break;
 197         case MPI2_IOCSTATUS_CONFIG_NO_DEFAULTS:
 198                 desc = "config no defaults";
 199                 break;
 200         case MPI2_IOCSTATUS_CONFIG_CANT_COMMIT:
 201                 desc = "config cant commit";
 202                 break;
 203
 204 /****************************************************************************
 205 *  SCSI IO Reply
 206 ****************************************************************************/
 207
 208         case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
 209         case MPI2_IOCSTATUS_SCSI_INVALID_DEVHANDLE:
 210         case MPI2_IOCSTATUS_SCSI_DEVICE_NOT_THERE:
 211         case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
 212         case MPI2_IOCSTATUS_SCSI_DATA_UNDERRUN:
 213         case MPI2_IOCSTATUS_SCSI_IO_DATA_ERROR:
 214         case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
 215         case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED:
 216         case MPI2_IOCSTATUS_SCSI_RESIDUAL_MISMATCH:
 217         case MPI2_IOCSTATUS_SCSI_TASK_MGMT_FAILED:
 218         case MPI2_IOCSTATUS_SCSI_IOC_TERMINATED:
 219         case MPI2_IOCSTATUS_SCSI_EXT_TERMINATED:
 220                 break;
 221
 222 /****************************************************************************
 223 *  For use by SCSI Initiator and SCSI Target end-to-end data protection
 224 ****************************************************************************/
 225
 226         case MPI2_IOCSTATUS_EEDP_GUARD_ERROR:
 227                 desc = "eedp guard error";
 228                 break;
 229         case MPI2_IOCSTATUS_EEDP_REF_TAG_ERROR:
 230                 desc = "eedp ref tag error";
 231                 break;
 232         case MPI2_IOCSTATUS_EEDP_APP_TAG_ERROR:
 233                 desc = "eedp app tag error";
 234                 break;
 235
 236 /****************************************************************************
 237 *  SCSI Target values
 238 ****************************************************************************/
 239
 240         case MPI2_IOCSTATUS_TARGET_INVALID_IO_INDEX:
 241                 desc = "target invalid io index";
 242                 break;
 243         case MPI2_IOCSTATUS_TARGET_ABORTED:
 244                 desc = "target aborted";
 245                 break;
 246         case MPI2_IOCSTATUS_TARGET_NO_CONN_RETRYABLE:
 247                 desc = "target no conn retryable";
 248                 break;
 249         case MPI2_IOCSTATUS_TARGET_NO_CONNECTION:
 250                 desc = "target no connection";
 251                 break;
 252         case MPI2_IOCSTATUS_TARGET_XFER_COUNT_MISMATCH:
 253                 desc = "target xfer count mismatch";
 254                 break;
 255         case MPI2_IOCSTATUS_TARGET_DATA_OFFSET_ERROR:
 256                 desc = "target data offset error";
 257                 break;
 258         case MPI2_IOCSTATUS_TARGET_TOO_MUCH_WRITE_DATA:
 259                 desc = "target too much write data";
 260                 break;
 261         case MPI2_IOCSTATUS_TARGET_IU_TOO_SHORT:
 262                 desc = "target iu too short";
 263                 break;
 264         case MPI2_IOCSTATUS_TARGET_ACK_NAK_TIMEOUT:
 265                 desc = "target ack nak timeout";
 266                 break;
 267         case MPI2_IOCSTATUS_TARGET_NAK_RECEIVED:
 268                 desc = "target nak received";
 269                 break;
 270
 271 /****************************************************************************
 272 *  Serial Attached SCSI values
 273 ****************************************************************************/
 274
 275         case MPI2_IOCSTATUS_SAS_SMP_REQUEST_FAILED:
 276                 desc = "smp request failed";
 277                 break;
 278         case MPI2_IOCSTATUS_SAS_SMP_DATA_OVERRUN:
 279                 desc = "smp data overrun";
 280                 break;
 281
 282 /****************************************************************************
 283 *  Diagnostic Buffer Post / Diagnostic Release values
 284 ****************************************************************************/
 285
 286         case MPI2_IOCSTATUS_DIAGNOSTIC_RELEASED:
 287                 desc = "diagnostic released";
 288                 break;
 289         default:
 290                 break;
 291         }
 292
 293         if (!desc)
 294                 return;
 295
 296         switch (request_hdr->Function) {
 297         case MPI2_FUNCTION_CONFIG:
 298                 frame_sz = sizeof(Mpi2ConfigRequest_t) + ioc->sge_size;
 299                 func_str = "config_page";
 300                 break;
 301         case MPI2_FUNCTION_SCSI_TASK_MGMT:
 302                 frame_sz = sizeof(Mpi2SCSITaskManagementRequest_t);
 303                 func_str = "task_mgmt";
 304                 break;
 305         case MPI2_FUNCTION_SAS_IO_UNIT_CONTROL:
 306                 frame_sz = sizeof(Mpi2SasIoUnitControlRequest_t);
 307                 func_str = "sas_iounit_ctl";
 308                 break;
 309         case MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR:
 310                 frame_sz = sizeof(Mpi2SepRequest_t);
 311                 func_str = "enclosure";
 312                 break;
 313         case MPI2_FUNCTION_IOC_INIT:
 314                 frame_sz = sizeof(Mpi2IOCInitRequest_t);
 315                 func_str = "ioc_init";
 316                 break;
 317         case MPI2_FUNCTION_PORT_ENABLE:
 318                 frame_sz = sizeof(Mpi2PortEnableRequest_t);
 319                 func_str = "port_enable";
 320                 break;
 321         case MPI2_FUNCTION_SMP_PASSTHROUGH:
 322                 frame_sz = sizeof(Mpi2SmpPassthroughRequest_t) + ioc->sge_size;
 323                 func_str = "smp_passthru";
 324                 break;
 325         default:
 326                 frame_sz = 32;
 327                 func_str = "unknown";
 328                 break;
 329         }
 330
 331         printk(MPT2SAS_WARN_FMT "ioc_status: %s(0x%04x), request(0x%p),"
 332             " (%s)\n", ioc->name, desc, ioc_status, request_hdr, func_str);
 333
 334         _debug_dump_mf(request_hdr, frame_sz/4);
 335 }
 336
 337 /**
 338  * _base_display_event_data - verbose translation of firmware asyn events
 339  * @ioc: pointer to scsi command object
 340  * @mpi_reply: reply mf payload returned from firmware
 341  *
 342  * Return nothing.
 343  */
 344 static void
 345 _base_display_event_data(struct MPT2SAS_ADAPTER *ioc,
 346     Mpi2EventNotificationReply_t *mpi_reply)
 347 {
 348         char *desc = NULL;
 349         u16 event;
 350
 351         if (!(ioc->logging_level & MPT_DEBUG_EVENTS))
 352                 return;
 353
 354         event = le16_to_cpu(mpi_reply->Event);
 355
 356         switch (event) {
 357         case MPI2_EVENT_LOG_DATA:
 358                 desc = "Log Data";
 359                 break;
 360         case MPI2_EVENT_STATE_CHANGE:
 361                 desc = "Status Change";
 362                 break;
 363         case MPI2_EVENT_HARD_RESET_RECEIVED:
 364                 desc = "Hard Reset Received";
 365                 break;
 366         case MPI2_EVENT_EVENT_CHANGE:
 367                 desc = "Event Change";
 368                 break;
 369         case MPI2_EVENT_TASK_SET_FULL:
 370                 desc = "Task Set Full";
 371                 break;
 372         case MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE:
 373                 desc = "Device Status Change";
 374                 break;
 375         case MPI2_EVENT_IR_OPERATION_STATUS:
 376                 desc = "IR Operation Status";
 377                 break;
 378         case MPI2_EVENT_SAS_DISCOVERY:
 379                 desc =  "Discovery";
 380                 break;
 381         case MPI2_EVENT_SAS_BROADCAST_PRIMITIVE:
 382                 desc = "SAS Broadcast Primitive";
 383                 break;
 384         case MPI2_EVENT_SAS_INIT_DEVICE_STATUS_CHANGE:
 385                 desc = "SAS Init Device Status Change";
 386                 break;
 387         case MPI2_EVENT_SAS_INIT_TABLE_OVERFLOW:
 388                 desc = "SAS Init Table Overflow";
 389                 break;
 390         case MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
 391                 desc = "SAS Topology Change List";
 392                 break;
 393         case MPI2_EVENT_SAS_ENCL_DEVICE_STATUS_CHANGE:
 394                 desc = "SAS Enclosure Device Status Change";
 395                 break;
 396         case MPI2_EVENT_IR_VOLUME:
 397                 desc = "IR Volume";
 398                 break;
 399         case MPI2_EVENT_IR_PHYSICAL_DISK:
 400                 desc = "IR Physical Disk";
 401                 break;
 402         case MPI2_EVENT_IR_CONFIGURATION_CHANGE_LIST:
 403                 desc = "IR Configuration Change List";
 404                 break;
 405         case MPI2_EVENT_LOG_ENTRY_ADDED:
 406                 desc = "Log Entry Added";
 407                 break;
 408         }
 409
 410         if (!desc)
 411                 return;
 412
 413         printk(MPT2SAS_INFO_FMT "%s\n", ioc->name, desc);
 414 }
 415 #endif
 416
 417 /**
 418  * _base_sas_log_info - verbose translation of firmware log info
 419  * @ioc: pointer to scsi command object
 420  * @log_info: log info
 421  *
 422  * Return nothing.
 423  */
 424 static void
 425 _base_sas_log_info(struct MPT2SAS_ADAPTER *ioc , u32 log_info)
 426 {
 427         union loginfo_type {
 428                 u32     loginfo;
 429                 struct {
 430                         u32     subcode:16;
 431                         u32     code:8;
 432                         u32     originator:4;
 433                         u32     bus_type:4;
 434                 } dw;
 435         };
 436         union loginfo_type sas_loginfo;
 437         char *originator_str = NULL;
 438
 439         sas_loginfo.loginfo = log_info;
 440         if (sas_loginfo.dw.bus_type != 3 /*SAS*/)
 441                 return;
 442
 443         /* eat the loginfos associated with task aborts */
 444         if (ioc->ignore_loginfos && (log_info == 30050000 || log_info ==
 445             0x31140000 || log_info == 0x31130000))
 446                 return;
 447
 448         switch (sas_loginfo.dw.originator) {
 449         case 0:
 450                 originator_str = "IOP";
 451                 break;
 452         case 1:
 453                 originator_str = "PL";
 454                 break;
 455         case 2:
 456                 originator_str = "IR";
 457                 break;
 458         }
 459
 460         printk(MPT2SAS_WARN_FMT "log_info(0x%08x): originator(%s), "
 461             "code(0x%02x), sub_code(0x%04x)\n", ioc->name, log_info,
 462              originator_str, sas_loginfo.dw.code,
 463              sas_loginfo.dw.subcode);
 464 }
 465
 466 /**
 467  * mpt2sas_base_fault_info - verbose translation of firmware FAULT code
 468  * @ioc: pointer to scsi command object
 469  * @fault_code: fault code
 470  *
 471  * Return nothing.
 472  */
 473 void
 474 mpt2sas_base_fault_info(struct MPT2SAS_ADAPTER *ioc , u16 fault_code)
 475 {
 476         printk(MPT2SAS_ERR_FMT "fault_state(0x%04x)!\n",
 477             ioc->name, fault_code);
 478 }
 479
 480 /**
 481  * _base_display_reply_info -
 482  * @ioc: pointer to scsi command object
 483  * @smid: system request message index
 484  * @VF_ID: virtual function id
 485  * @reply: reply message frame(lower 32bit addr)
 486  *
 487  * Return nothing.
 488  */
 489 static void
 490 _base_display_reply_info(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID,
 491     u32 reply)
 492 {
 493         MPI2DefaultReply_t *mpi_reply;
 494         u16 ioc_status;
 495
 496         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 497         ioc_status = le16_to_cpu(mpi_reply->IOCStatus);
 498 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 499         if ((ioc_status & MPI2_IOCSTATUS_MASK) &&
 500             (ioc->logging_level & MPT_DEBUG_REPLY)) {
 501                 _base_sas_ioc_info(ioc , mpi_reply,
 502                    mpt2sas_base_get_msg_frame(ioc, smid));
 503         }
 504 #endif
 505         if (ioc_status & MPI2_IOCSTATUS_FLAG_LOG_INFO_AVAILABLE)
 506                 _base_sas_log_info(ioc, le32_to_cpu(mpi_reply->IOCLogInfo));
 507 }
 508
 509 /**
 510  * mpt2sas_base_done - base internal command completion routine
 511  * @ioc: pointer to scsi command object
 512  * @smid: system request message index
 513  * @VF_ID: virtual function id
 514  * @reply: reply message frame(lower 32bit addr)
 515  *
 516  * Return nothing.
 517  */
 518 void
 519 mpt2sas_base_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
 520 {
 521         MPI2DefaultReply_t *mpi_reply;
 522
 523         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 524         if (mpi_reply && mpi_reply->Function == MPI2_FUNCTION_EVENT_ACK)
 525                 return;
 526
 527         if (ioc->base_cmds.status == MPT2_CMD_NOT_USED)
 528                 return;
 529
 530         ioc->base_cmds.status |= MPT2_CMD_COMPLETE;
 531         if (mpi_reply) {
 532                 ioc->base_cmds.status |= MPT2_CMD_REPLY_VALID;
 533                 memcpy(ioc->base_cmds.reply, mpi_reply, mpi_reply->MsgLength*4);
 534         }
 535         ioc->base_cmds.status &= ~MPT2_CMD_PENDING;
 536         complete(&ioc->base_cmds.done);
 537 }
 538
 539 /**
 540  * _base_async_event - main callback handler for firmware asyn events
 541  * @ioc: pointer to scsi command object
 542  * @VF_ID: virtual function id
 543  * @reply: reply message frame(lower 32bit addr)
 544  *
 545  * Return nothing.
 546  */
 547 static void
 548 _base_async_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID, u32 reply)
 549 {
 550         Mpi2EventNotificationReply_t *mpi_reply;
 551         Mpi2EventAckRequest_t *ack_request;
 552         u16 smid;
 553
 554         mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply);
 555         if (!mpi_reply)
 556                 return;
 557         if (mpi_reply->Function != MPI2_FUNCTION_EVENT_NOTIFICATION)
 558                 return;
 559 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
 560         _base_display_event_data(ioc, mpi_reply);
 561 #endif
 562         if (!(mpi_reply->AckRequired & MPI2_EVENT_NOTIFICATION_ACK_REQUIRED))
 563                 goto out;
 564         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
 565         if (!smid) {
 566                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
 567                     ioc->name, __func__);
 568                 goto out;
 569         }
 570
 571         ack_request = mpt2sas_base_get_msg_frame(ioc, smid);
 572         memset(ack_request, 0, sizeof(Mpi2EventAckRequest_t));
 573         ack_request->Function = MPI2_FUNCTION_EVENT_ACK;
 574         ack_request->Event = mpi_reply->Event;
 575         ack_request->EventContext = mpi_reply->EventContext;
 576         ack_request->VF_ID = VF_ID;
 577         mpt2sas_base_put_smid_default(ioc, smid, VF_ID);
 578
 579  out:
 580
 581         /* scsih callback handler */
 582         mpt2sas_scsih_event_callback(ioc, VF_ID, reply);
 583
 584         /* ctl callback handler */
 585         mpt2sas_ctl_event_callback(ioc, VF_ID, reply);
 586 }
 587
 588 /**
 589  * _base_mask_interrupts - disable interrupts
 590  * @ioc: pointer to scsi command object
 591  *
 592  * Disabling ResetIRQ, Reply and Doorbell Interrupts
 593  *
 594  * Return nothing.
 595  */
 596 static void
 597 _base_mask_interrupts(struct MPT2SAS_ADAPTER *ioc)
 598 {
 599         u32 him_register;
 600
 601         ioc->mask_interrupts = 1;
 602         him_register = readl(&ioc->chip->HostInterruptMask);
 603         him_register |= MPI2_HIM_DIM + MPI2_HIM_RIM + MPI2_HIM_RESET_IRQ_MASK;
 604         writel(him_register, &ioc->chip->HostInterruptMask);
 605         readl(&ioc->chip->HostInterruptMask);
 606 }
 607
 608 /**
 609  * _base_unmask_interrupts - enable interrupts
 610  * @ioc: pointer to scsi command object
 611  *
 612  * Enabling only Reply Interrupts
 613  *
 614  * Return nothing.
 615  */
 616 static void
 617 _base_unmask_interrupts(struct MPT2SAS_ADAPTER *ioc)
 618 {
 619         u32 him_register;
 620
 621         writel(0, &ioc->chip->HostInterruptStatus);
 622         him_register = readl(&ioc->chip->HostInterruptMask);
 623         him_register &= ~MPI2_HIM_RIM;
 624         writel(him_register, &ioc->chip->HostInterruptMask);
 625         ioc->mask_interrupts = 0;
 626 }
 627
 628 /**
 629  * _base_interrupt - MPT adapter (IOC) specific interrupt handler.
 630  * @irq: irq number (not used)
 631  * @bus_id: bus identifier cookie == pointer to MPT_ADAPTER structure
 632  * @r: pt_regs pointer (not used)
 633  *
 634  * Return IRQ_HANDLE if processed, else IRQ_NONE.
 635  */
 636 static irqreturn_t
 637 _base_interrupt(int irq, void *bus_id)
 638 {
 639         u32 post_index, post_index_next, completed_cmds;
 640         u8 request_desript_type;
 641         u16 smid;
 642         u8 cb_idx;
 643         u32 reply;
 644         u8 VF_ID;
 645         int i;
 646         struct MPT2SAS_ADAPTER *ioc = bus_id;
 647
 648         if (ioc->mask_interrupts)
 649                 return IRQ_NONE;
 650
 651         post_index = ioc->reply_post_host_index;
 652         request_desript_type = ioc->reply_post_free[post_index].
 653             Default.ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 654         if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
 655                 return IRQ_NONE;
 656
 657         completed_cmds = 0;
 658         do {
 659                 if (ioc->reply_post_free[post_index].Words == ~0ULL)
 660                         goto out;
 661                 reply = 0;
 662                 cb_idx = 0xFF;
 663                 smid = le16_to_cpu(ioc->reply_post_free[post_index].
 664                     Default.DescriptorTypeDependent1);
 665                 VF_ID = ioc->reply_post_free[post_index].
 666                     Default.VF_ID;
 667                 if (request_desript_type ==
 668                     MPI2_RPY_DESCRIPT_FLAGS_ADDRESS_REPLY) {
 669                         reply = le32_to_cpu(ioc->reply_post_free[post_index].
 670                             AddressReply.ReplyFrameAddress);
 671                 } else if (request_desript_type ==
 672                     MPI2_RPY_DESCRIPT_FLAGS_TARGET_COMMAND_BUFFER)
 673                         goto next;
 674                 else if (request_desript_type ==
 675                     MPI2_RPY_DESCRIPT_FLAGS_TARGETASSIST_SUCCESS)
 676                         goto next;
 677                 if (smid)
 678                         cb_idx = ioc->scsi_lookup[smid - 1].cb_idx;
 679                 if (smid && cb_idx != 0xFF) {
 680                         mpt_callbacks[cb_idx](ioc, smid, VF_ID, reply);
 681                         if (reply)
 682                                 _base_display_reply_info(ioc, smid, VF_ID,
 683                                     reply);
 684                         mpt2sas_base_free_smid(ioc, smid);
 685                 }
 686                 if (!smid)
 687                         _base_async_event(ioc, VF_ID, reply);
 688
 689                 /* reply free queue handling */
 690                 if (reply) {
 691                         ioc->reply_free_host_index =
 692                             (ioc->reply_free_host_index ==
 693                             (ioc->reply_free_queue_depth - 1)) ?
 694                             0 : ioc->reply_free_host_index + 1;
 695                         ioc->reply_free[ioc->reply_free_host_index] =
 696                             cpu_to_le32(reply);
 697                         writel(ioc->reply_free_host_index,
 698                             &ioc->chip->ReplyFreeHostIndex);
 699                         wmb();
 700                 }
 701
 702  next:
 703                 post_index_next = (post_index == (ioc->reply_post_queue_depth -
 704                     1)) ? 0 : post_index + 1;
 705                 request_desript_type =
 706                     ioc->reply_post_free[post_index_next].Default.ReplyFlags
 707                     & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
 708                 completed_cmds++;
 709                 if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
 710                         goto out;
 711                 post_index = post_index_next;
 712         } while (1);
 713
 714  out:
 715
 716         if (!completed_cmds)
 717                 return IRQ_NONE;
 718
 719         /* reply post descriptor handling */
 720         post_index_next = ioc->reply_post_host_index;
 721         for (i = 0 ; i < completed_cmds; i++) {
 722                 post_index = post_index_next;
 723                 /* poison the reply post descriptor */
 724                 ioc->reply_post_free[post_index_next].Words = ~0ULL;
 725                 post_index_next = (post_index ==
 726                     (ioc->reply_post_queue_depth - 1))
 727                     ? 0 : post_index + 1;
 728         }
 729         ioc->reply_post_host_index = post_index_next;
 730         writel(post_index_next, &ioc->chip->ReplyPostHostIndex);
 731         wmb();
 732         return IRQ_HANDLED;
 733 }
 734
 735 /**
 736  * mpt2sas_base_release_callback_handler - clear interupt callback handler
 737  * @cb_idx: callback index
 738  *
 739  * Return nothing.
 740  */
 741 void
 742 mpt2sas_base_release_callback_handler(u8 cb_idx)
 743 {
 744         mpt_callbacks[cb_idx] = NULL;
 745 }
 746
 747 /**
 748  * mpt2sas_base_register_callback_handler - obtain index for the interrupt callback handler
 749  * @cb_func: callback function
 750  *
 751  * Returns cb_func.
 752  */
 753 u8
 754 mpt2sas_base_register_callback_handler(MPT_CALLBACK cb_func)
 755 {
 756         u8 cb_idx;
 757
 758         for (cb_idx = MPT_MAX_CALLBACKS-1; cb_idx; cb_idx--)
 759                 if (mpt_callbacks[cb_idx] == NULL)
 760                         break;
 761
 762         mpt_callbacks[cb_idx] = cb_func;
 763         return cb_idx;
 764 }
 765
 766 /**
 767  * mpt2sas_base_initialize_callback_handler - initialize the interrupt callback handler
 768  *
 769  * Return nothing.
 770  */
 771 void
 772 mpt2sas_base_initialize_callback_handler(void)
 773 {
 774         u8 cb_idx;
 775
 776         for (cb_idx = 0; cb_idx < MPT_MAX_CALLBACKS; cb_idx++)
 777                 mpt2sas_base_release_callback_handler(cb_idx);
 778 }
 779
 780 /**
 781  * mpt2sas_base_build_zero_len_sge - build zero length sg entry
 782  * @ioc: per adapter object
 783  * @paddr: virtual address for SGE
 784  *
 785  * Create a zero length scatter gather entry to insure the IOCs hardware has
 786  * something to use if the target device goes brain dead and tries
 787  * to send data even when none is asked for.
 788  *
 789  * Return nothing.
 790  */
 791 void
 792 mpt2sas_base_build_zero_len_sge(struct MPT2SAS_ADAPTER *ioc, void *paddr)
 793 {
 794         u32 flags_length = (u32)((MPI2_SGE_FLAGS_LAST_ELEMENT |
 795             MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_END_OF_LIST |
 796             MPI2_SGE_FLAGS_SIMPLE_ELEMENT) <<
 797             MPI2_SGE_FLAGS_SHIFT);
 798         ioc->base_add_sg_single(paddr, flags_length, -1);
 799 }
 800
 801 /**
 802  * _base_add_sg_single_32 - Place a simple 32 bit SGE at address pAddr.
 803  * @paddr: virtual address for SGE
 804  * @flags_length: SGE flags and data transfer length
 805  * @dma_addr: Physical address
 806  *
 807  * Return nothing.
 808  */
 809 static void
 810 _base_add_sg_single_32(void *paddr, u32 flags_length, dma_addr_t dma_addr)
 811 {
 812         Mpi2SGESimple32_t *sgel = paddr;
 813
 814         flags_length |= (MPI2_SGE_FLAGS_32_BIT_ADDRESSING |
 815             MPI2_SGE_FLAGS_SYSTEM_ADDRESS) << MPI2_SGE_FLAGS_SHIFT;
 816         sgel->FlagsLength = cpu_to_le32(flags_length);
 817         sgel->Address = cpu_to_le32(dma_addr);
 818 }
 819
 820
 821 /**
 822  * _base_add_sg_single_64 - Place a simple 64 bit SGE at address pAddr.
 823  * @paddr: virtual address for SGE
 824  * @flags_length: SGE flags and data transfer length
 825  * @dma_addr: Physical address
 826  *
 827  * Return nothing.
 828  */
 829 static void
 830 _base_add_sg_single_64(void *paddr, u32 flags_length, dma_addr_t dma_addr)
 831 {
 832         Mpi2SGESimple64_t *sgel = paddr;
 833
 834         flags_length |= (MPI2_SGE_FLAGS_64_BIT_ADDRESSING |
 835             MPI2_SGE_FLAGS_SYSTEM_ADDRESS) << MPI2_SGE_FLAGS_SHIFT;
 836         sgel->FlagsLength = cpu_to_le32(flags_length);
 837         sgel->Address = cpu_to_le64(dma_addr);
 838 }
 839
 840 #define convert_to_kb(x) ((x) << (PAGE_SHIFT - 10))
 841
 842 /**
 843  * _base_config_dma_addressing - set dma addressing
 844  * @ioc: per adapter object
 845  * @pdev: PCI device struct
 846  *
 847  * Returns 0 for success, non-zero for failure.
 848  */
 849 static int
 850 _base_config_dma_addressing(struct MPT2SAS_ADAPTER *ioc, struct pci_dev *pdev)
 851 {
 852         struct sysinfo s;
 853         char *desc = NULL;
 854
 855         if (sizeof(dma_addr_t) > 4) {
 856                 const uint64_t required_mask =
 857                     dma_get_required_mask(&pdev->dev);
 858                 if ((required_mask > DMA_32BIT_MASK) && !pci_set_dma_mask(pdev,
 859                     DMA_64BIT_MASK) && !pci_set_consistent_dma_mask(pdev,
 860                     DMA_64BIT_MASK)) {
 861                         ioc->base_add_sg_single = &_base_add_sg_single_64;
 862                         ioc->sge_size = sizeof(Mpi2SGESimple64_t);
 863                         desc = "64";
 864                         goto out;
 865                 }
 866         }
 867
 868         if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)
 869             && !pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
 870                 ioc->base_add_sg_single = &_base_add_sg_single_32;
 871                 ioc->sge_size = sizeof(Mpi2SGESimple32_t);
 872                 desc = "32";
 873         } else
 874                 return -ENODEV;
 875
 876  out:
 877         si_meminfo(&s);
 878         printk(MPT2SAS_INFO_FMT "%s BIT PCI BUS DMA ADDRESSING SUPPORTED, "
 879             "total mem (%ld kB)\n", ioc->name, desc, convert_to_kb(s.totalram));
 880
 881         return 0;
 882 }
 883
 884 /**
 885  * _base_save_msix_table - backup msix vector table
 886  * @ioc: per adapter object
 887  *
 888  * This address an errata where diag reset clears out the table
 889  */
 890 static void
 891 _base_save_msix_table(struct MPT2SAS_ADAPTER *ioc)
 892 {
 893         int i;
 894
 895         if (!ioc->msix_enable || ioc->msix_table_backup == NULL)
 896                 return;
 897
 898         for (i = 0; i < ioc->msix_vector_count; i++)
 899                 ioc->msix_table_backup[i] = ioc->msix_table[i];
 900 }
 901
 902 /**
 903  * _base_restore_msix_table - this restores the msix vector table
 904  * @ioc: per adapter object
 905  *
 906  */
 907 static void
 908 _base_restore_msix_table(struct MPT2SAS_ADAPTER *ioc)
 909 {
 910         int i;
 911
 912         if (!ioc->msix_enable || ioc->msix_table_backup == NULL)
 913                 return;
 914
 915         for (i = 0; i < ioc->msix_vector_count; i++)
 916                 ioc->msix_table[i] = ioc->msix_table_backup[i];
 917 }
 918
 919 /**
 920  * _base_check_enable_msix - checks MSIX capabable.
 921  * @ioc: per adapter object
 922  *
 923  * Check to see if card is capable of MSIX, and set number
 924  * of avaliable msix vectors
 925  */
 926 static int
 927 _base_check_enable_msix(struct MPT2SAS_ADAPTER *ioc)
 928 {
 929         int base;
 930         u16 message_control;
 931         u32 msix_table_offset;
 932
 933         base = pci_find_capability(ioc->pdev, PCI_CAP_ID_MSIX);
 934         if (!base) {
 935                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "msix not "
 936                     "supported\n", ioc->name));
 937                 return -EINVAL;
 938         }
 939
 940         /* get msix vector count */
 941         pci_read_config_word(ioc->pdev, base + 2, &message_control);
 942         ioc->msix_vector_count = (message_control & 0x3FF) + 1;
 943
 944         /* get msix table  */
 945         pci_read_config_dword(ioc->pdev, base + 4, &msix_table_offset);
 946         msix_table_offset &= 0xFFFFFFF8;
 947         ioc->msix_table = (u32 *)((void *)ioc->chip + msix_table_offset);
 948
 949         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "msix is supported, "
 950             "vector_count(%d), table_offset(0x%08x), table(%p)\n", ioc->name,
 951             ioc->msix_vector_count, msix_table_offset, ioc->msix_table));
 952         return 0;
 953 }
 954
 955 /**
 956  * _base_disable_msix - disables msix
 957  * @ioc: per adapter object
 958  *
 959  */
 960 static void
 961 _base_disable_msix(struct MPT2SAS_ADAPTER *ioc)
 962 {
 963         if (ioc->msix_enable) {
 964                 pci_disable_msix(ioc->pdev);
 965                 kfree(ioc->msix_table_backup);
 966                 ioc->msix_table_backup = NULL;
 967                 ioc->msix_enable = 0;
 968         }
 969 }
 970
 971 /**
 972  * _base_enable_msix - enables msix, failback to io_apic
 973  * @ioc: per adapter object
 974  *
 975  */
 976 static int
 977 _base_enable_msix(struct MPT2SAS_ADAPTER *ioc)
 978 {
 979         struct msix_entry entries;
 980         int r;
 981         u8 try_msix = 0;
 982
 983         if (msix_disable == -1 || msix_disable == 0)
 984                 try_msix = 1;
 985
 986         if (!try_msix)
 987                 goto try_ioapic;
 988
 989         if (_base_check_enable_msix(ioc) != 0)
 990                 goto try_ioapic;
 991
 992         ioc->msix_table_backup = kcalloc(ioc->msix_vector_count,
 993             sizeof(u32), GFP_KERNEL);
 994         if (!ioc->msix_table_backup) {
 995                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "allocation for "
 996                     "msix_table_backup failed!!!\n", ioc->name));
 997                 goto try_ioapic;
 998         }
 999
1000         memset(&entries, 0, sizeof(struct msix_entry));
1001         r = pci_enable_msix(ioc->pdev, &entries, 1);
1002         if (r) {
1003                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "pci_enable_msix "
1004                     "failed (r=%d) !!!\n", ioc->name, r));
1005                 goto try_ioapic;
1006         }
1007
1008         r = request_irq(entries.vector, _base_interrupt, IRQF_SHARED,
1009             ioc->name, ioc);
1010         if (r) {
1011                 dfailprintk(ioc, printk(MPT2SAS_INFO_FMT "unable to allocate "
1012                     "interrupt %d !!!\n", ioc->name, entries.vector));
1013                 pci_disable_msix(ioc->pdev);
1014                 goto try_ioapic;
1015         }
1016
1017         ioc->pci_irq = entries.vector;
1018         ioc->msix_enable = 1;
1019         return 0;
1020
1021 /* failback to io_apic interrupt routing */
1022  try_ioapic:
1023
1024         r = request_irq(ioc->pdev->irq, _base_interrupt, IRQF_SHARED,
1025             ioc->name, ioc);
1026         if (r) {
1027                 printk(MPT2SAS_ERR_FMT "unable to allocate interrupt %d!\n",
1028                     ioc->name, ioc->pdev->irq);
1029                 r = -EBUSY;
1030                 goto out_fail;
1031         }
1032
1033         ioc->pci_irq = ioc->pdev->irq;
1034         return 0;
1035
1036  out_fail:
1037         return r;
1038 }
1039
1040 /**
1041  * mpt2sas_base_map_resources - map in controller resources (io/irq/memap)
1042  * @ioc: per adapter object
1043  *
1044  * Returns 0 for success, non-zero for failure.
1045  */
1046 int
1047 mpt2sas_base_map_resources(struct MPT2SAS_ADAPTER *ioc)
1048 {
1049         struct pci_dev *pdev = ioc->pdev;
1050         u32 memap_sz;
1051         u32 pio_sz;
1052         int i, r = 0;
1053
1054         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n",
1055             ioc->name, __func__));
1056
1057         ioc->bars = pci_select_bars(pdev, IORESOURCE_MEM);
1058         if (pci_enable_device_mem(pdev)) {
1059                 printk(MPT2SAS_WARN_FMT "pci_enable_device_mem: "
1060                     "failed\n", ioc->name);
1061                 return -ENODEV;
1062         }
1063
1064
1065         if (pci_request_selected_regions(pdev, ioc->bars,
1066             MPT2SAS_DRIVER_NAME)) {
1067                 printk(MPT2SAS_WARN_FMT "pci_request_selected_regions: "
1068                     "failed\n", ioc->name);
1069                 r = -ENODEV;
1070                 goto out_fail;
1071         }
1072
1073         pci_set_master(pdev);
1074
1075         if (_base_config_dma_addressing(ioc, pdev) != 0) {
1076                 printk(MPT2SAS_WARN_FMT "no suitable DMA mask for %s\n",
1077                     ioc->name, pci_name(pdev));
1078                 r = -ENODEV;
1079                 goto out_fail;
1080         }
1081
1082         for (i = 0, memap_sz = 0, pio_sz = 0 ; i < DEVICE_COUNT_RESOURCE; i++) {
1083                 if (pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE_IO) {
1084                         if (pio_sz)
1085                                 continue;
1086                         ioc->pio_chip = pci_resource_start(pdev, i);
1087                         pio_sz = pci_resource_len(pdev, i);
1088                 } else {
1089                         if (memap_sz)
1090                                 continue;
1091                         ioc->chip_phys = pci_resource_start(pdev, i);
1092                         memap_sz = pci_resource_len(pdev, i);
1093                         ioc->chip = ioremap(ioc->chip_phys, memap_sz);
1094                         if (ioc->chip == NULL) {
1095                                 printk(MPT2SAS_ERR_FMT "unable to map adapter "
1096                                     "memory!\n", ioc->name);
1097                                 r = -EINVAL;
1098                                 goto out_fail;
1099                         }
1100                 }
1101         }
1102
1103         pci_set_drvdata(pdev, ioc->shost);
1104         _base_mask_interrupts(ioc);
1105         r = _base_enable_msix(ioc);
1106         if (r)
1107                 goto out_fail;
1108
1109         printk(MPT2SAS_INFO_FMT "%s: IRQ %d\n",
1110             ioc->name,  ((ioc->msix_enable) ? "PCI-MSI-X enabled" :
1111             "IO-APIC enabled"), ioc->pci_irq);
1112         printk(MPT2SAS_INFO_FMT "iomem(0x%lx), mapped(0x%p), size(%d)\n",
1113             ioc->name, ioc->chip_phys, ioc->chip, memap_sz);
1114         printk(MPT2SAS_INFO_FMT "ioport(0x%lx), size(%d)\n",
1115             ioc->name, ioc->pio_chip, pio_sz);
1116
1117         return 0;
1118
1119  out_fail:
1120         if (ioc->chip_phys)
1121                 iounmap(ioc->chip);
1122         ioc->chip_phys = 0;
1123         ioc->pci_irq = -1;
1124         pci_release_selected_regions(ioc->pdev, ioc->bars);
1125         pci_disable_device(pdev);
1126         pci_set_drvdata(pdev, NULL);
1127         return r;
1128 }
1129
1130 /**
1131  * mpt2sas_base_get_msg_frame_dma - obtain request mf pointer phys addr
1132  * @ioc: per adapter object
1133  * @smid: system request message index(smid zero is invalid)
1134  *
1135  * Returns phys pointer to message frame.
1136  */
1137 dma_addr_t
1138 mpt2sas_base_get_msg_frame_dma(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1139 {
1140         return ioc->request_dma + (smid * ioc->request_sz);
1141 }
1142
1143 /**
1144  * mpt2sas_base_get_msg_frame - obtain request mf pointer
1145  * @ioc: per adapter object
1146  * @smid: system request message index(smid zero is invalid)
1147  *
1148  * Returns virt pointer to message frame.
1149  */
1150 void *
1151 mpt2sas_base_get_msg_frame(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1152 {
1153         return (void *)(ioc->request + (smid * ioc->request_sz));
1154 }
1155
1156 /**
1157  * mpt2sas_base_get_sense_buffer - obtain a sense buffer assigned to a mf request
1158  * @ioc: per adapter object
1159  * @smid: system request message index
1160  *
1161  * Returns virt pointer to sense buffer.
1162  */
1163 void *
1164 mpt2sas_base_get_sense_buffer(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1165 {
1166         return (void *)(ioc->sense + ((smid - 1) * SCSI_SENSE_BUFFERSIZE));
1167 }
1168
1169 /**
1170  * mpt2sas_base_get_sense_buffer_dma - obtain a sense buffer assigned to a mf request
1171  * @ioc: per adapter object
1172  * @smid: system request message index
1173  *
1174  * Returns phys pointer to sense buffer.
1175  */
1176 dma_addr_t
1177 mpt2sas_base_get_sense_buffer_dma(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1178 {
1179         return ioc->sense_dma + ((smid - 1) * SCSI_SENSE_BUFFERSIZE);
1180 }
1181
1182 /**
1183  * mpt2sas_base_get_reply_virt_addr - obtain reply frames virt address
1184  * @ioc: per adapter object
1185  * @phys_addr: lower 32 physical addr of the reply
1186  *
1187  * Converts 32bit lower physical addr into a virt address.
1188  */
1189 void *
1190 mpt2sas_base_get_reply_virt_addr(struct MPT2SAS_ADAPTER *ioc, u32 phys_addr)
1191 {
1192         if (!phys_addr)
1193                 return NULL;
1194         return ioc->reply + (phys_addr - (u32)ioc->reply_dma);
1195 }
1196
1197 /**
1198  * mpt2sas_base_get_smid - obtain a free smid
1199  * @ioc: per adapter object
1200  * @cb_idx: callback index
1201  *
1202  * Returns smid (zero is invalid)
1203  */
1204 u16
1205 mpt2sas_base_get_smid(struct MPT2SAS_ADAPTER *ioc, u8 cb_idx)
1206 {
1207         unsigned long flags;
1208         struct request_tracker *request;
1209         u16 smid;
1210
1211         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1212         if (list_empty(&ioc->free_list)) {
1213                 spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1214                 printk(MPT2SAS_ERR_FMT "%s: smid not available\n",
1215                     ioc->name, __func__);
1216                 return 0;
1217         }
1218
1219         request = list_entry(ioc->free_list.next,
1220             struct request_tracker, tracker_list);
1221         request->cb_idx = cb_idx;
1222         smid = request->smid;
1223         list_del(&request->tracker_list);
1224         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1225         return smid;
1226 }
1227
1228
1229 /**
1230  * mpt2sas_base_free_smid - put smid back on free_list
1231  * @ioc: per adapter object
1232  * @smid: system request message index
1233  *
1234  * Return nothing.
1235  */
1236 void
1237 mpt2sas_base_free_smid(struct MPT2SAS_ADAPTER *ioc, u16 smid)
1238 {
1239         unsigned long flags;
1240
1241         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
1242         ioc->scsi_lookup[smid - 1].cb_idx = 0xFF;
1243         list_add_tail(&ioc->scsi_lookup[smid - 1].tracker_list,
1244             &ioc->free_list);
1245         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
1246
1247         /*
1248          * See _wait_for_commands_to_complete() call with regards to this code.
1249          */
1250         if (ioc->shost_recovery && ioc->pending_io_count) {
1251                 if (ioc->pending_io_count == 1)
1252                         wake_up(&ioc->reset_wq);
1253                 ioc->pending_io_count--;
1254         }
1255 }
1256
1257 /**
1258  * _base_writeq - 64 bit write to MMIO
1259  * @ioc: per adapter object
1260  * @b: data payload
1261  * @addr: address in MMIO space
1262  * @writeq_lock: spin lock
1263  *
1264  * Glue for handling an atomic 64 bit word to MMIO. This special handling takes
1265  * care of 32 bit environment where its not quarenteed to send the entire word
1266  * in one transfer.
1267  */
1268 #ifndef writeq
1269 static inline void _base_writeq(__u64 b, volatile void __iomem *addr,
1270     spinlock_t *writeq_lock)
1271 {
1272         unsigned long flags;
1273         __u64 data_out = cpu_to_le64(b);
1274
1275         spin_lock_irqsave(writeq_lock, flags);
1276         writel((u32)(data_out), addr);
1277         writel((u32)(data_out >> 32), (addr + 4));
1278         spin_unlock_irqrestore(writeq_lock, flags);
1279 }
1280 #else
1281 static inline void _base_writeq(__u64 b, volatile void __iomem *addr,
1282     spinlock_t *writeq_lock)
1283 {
1284         writeq(cpu_to_le64(b), addr);
1285 }
1286 #endif
1287
1288 /**
1289  * mpt2sas_base_put_smid_scsi_io - send SCSI_IO request to firmware
1290  * @ioc: per adapter object
1291  * @smid: system request message index
1292  * @vf_id: virtual function id
1293  * @handle: device handle
1294  *
1295  * Return nothing.
1296  */
1297 void
1298 mpt2sas_base_put_smid_scsi_io(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 vf_id,
1299     u16 handle)
1300 {
1301         Mpi2RequestDescriptorUnion_t descriptor;
1302         u64 *request = (u64 *)&descriptor;
1303
1304
1305         descriptor.SCSIIO.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO;
1306         descriptor.SCSIIO.VF_ID = vf_id;
1307         descriptor.SCSIIO.SMID = cpu_to_le16(smid);
1308         descriptor.SCSIIO.DevHandle = cpu_to_le16(handle);
1309         descriptor.SCSIIO.LMID = 0;
1310         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1311             &ioc->scsi_lookup_lock);
1312 }
1313
1314
1315 /**
1316  * mpt2sas_base_put_smid_hi_priority - send Task Managment request to firmware
1317  * @ioc: per adapter object
1318  * @smid: system request message index
1319  * @vf_id: virtual function id
1320  *
1321  * Return nothing.
1322  */
1323 void
1324 mpt2sas_base_put_smid_hi_priority(struct MPT2SAS_ADAPTER *ioc, u16 smid,
1325     u8 vf_id)
1326 {
1327         Mpi2RequestDescriptorUnion_t descriptor;
1328         u64 *request = (u64 *)&descriptor;
1329
1330         descriptor.HighPriority.RequestFlags =
1331             MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY;
1332         descriptor.HighPriority.VF_ID = vf_id;
1333         descriptor.HighPriority.SMID = cpu_to_le16(smid);
1334         descriptor.HighPriority.LMID = 0;
1335         descriptor.HighPriority.Reserved1 = 0;
1336         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1337             &ioc->scsi_lookup_lock);
1338 }
1339
1340 /**
1341  * mpt2sas_base_put_smid_default - Default, primarily used for config pages
1342  * @ioc: per adapter object
1343  * @smid: system request message index
1344  * @vf_id: virtual function id
1345  *
1346  * Return nothing.
1347  */
1348 void
1349 mpt2sas_base_put_smid_default(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 vf_id)
1350 {
1351         Mpi2RequestDescriptorUnion_t descriptor;
1352         u64 *request = (u64 *)&descriptor;
1353
1354         descriptor.Default.RequestFlags = MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
1355         descriptor.Default.VF_ID = vf_id;
1356         descriptor.Default.SMID = cpu_to_le16(smid);
1357         descriptor.Default.LMID = 0;
1358         descriptor.Default.DescriptorTypeDependent = 0;
1359         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1360             &ioc->scsi_lookup_lock);
1361 }
1362
1363 /**
1364  * mpt2sas_base_put_smid_target_assist - send Target Assist/Status to firmware
1365  * @ioc: per adapter object
1366  * @smid: system request message index
1367  * @vf_id: virtual function id
1368  * @io_index: value used to track the IO
1369  *
1370  * Return nothing.
1371  */
1372 void
1373 mpt2sas_base_put_smid_target_assist(struct MPT2SAS_ADAPTER *ioc, u16 smid,
1374     u8 vf_id, u16 io_index)
1375 {
1376         Mpi2RequestDescriptorUnion_t descriptor;
1377         u64 *request = (u64 *)&descriptor;
1378
1379         descriptor.SCSITarget.RequestFlags =
1380             MPI2_REQ_DESCRIPT_FLAGS_SCSI_TARGET;
1381         descriptor.SCSITarget.VF_ID = vf_id;
1382         descriptor.SCSITarget.SMID = cpu_to_le16(smid);
1383         descriptor.SCSITarget.LMID = 0;
1384         descriptor.SCSITarget.IoIndex = cpu_to_le16(io_index);
1385         _base_writeq(*request, &ioc->chip->RequestDescriptorPostLow,
1386             &ioc->scsi_lookup_lock);
1387 }
1388
1389 /**
1390  * _base_display_ioc_capabilities - Disply IOC's capabilities.
1391  * @ioc: per adapter object
1392  *
1393  * Return nothing.
1394  */
1395 static void
1396 _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
1397 {
1398         int i = 0;
1399         char desc[16];
1400         u8 revision;
1401         u32 iounit_pg1_flags;
1402
1403         pci_read_config_byte(ioc->pdev, PCI_CLASS_REVISION, &revision);
1404         strncpy(desc, ioc->manu_pg0.ChipName, 16);
1405         printk(MPT2SAS_INFO_FMT "%s: FWVersion(%02d.%02d.%02d.%02d), "
1406            "ChipRevision(0x%02x), BiosVersion(%02d.%02d.%02d.%02d)\n",
1407             ioc->name, desc,
1408            (ioc->facts.FWVersion.Word & 0xFF000000) >> 24,
1409            (ioc->facts.FWVersion.Word & 0x00FF0000) >> 16,
1410            (ioc->facts.FWVersion.Word & 0x0000FF00) >> 8,
1411            ioc->facts.FWVersion.Word & 0x000000FF,
1412            revision,
1413            (ioc->bios_pg3.BiosVersion & 0xFF000000) >> 24,
1414            (ioc->bios_pg3.BiosVersion & 0x00FF0000) >> 16,
1415            (ioc->bios_pg3.BiosVersion & 0x0000FF00) >> 8,
1416             ioc->bios_pg3.BiosVersion & 0x000000FF);
1417
1418         printk(MPT2SAS_INFO_FMT "Protocol=(", ioc->name);
1419
1420         if (ioc->facts.ProtocolFlags & MPI2_IOCFACTS_PROTOCOL_SCSI_INITIATOR) {
1421                 printk("Initiator");
1422                 i++;
1423         }
1424
1425         if (ioc->facts.ProtocolFlags & MPI2_IOCFACTS_PROTOCOL_SCSI_TARGET) {
1426                 printk("%sTarget", i ? "," : "");
1427                 i++;
1428         }
1429
1430         i = 0;
1431         printk("), ");
1432         printk("Capabilities=(");
1433
1434         if (ioc->facts.IOCCapabilities &
1435             MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID) {
1436                 printk("Raid");
1437                 i++;
1438         }
1439
1440         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_TLR) {
1441                 printk("%sTLR", i ? "," : "");
1442                 i++;
1443         }
1444
1445         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_MULTICAST) {
1446                 printk("%sMulticast", i ? "," : "");
1447                 i++;
1448         }
1449
1450         if (ioc->facts.IOCCapabilities &
1451             MPI2_IOCFACTS_CAPABILITY_BIDIRECTIONAL_TARGET) {
1452                 printk("%sBIDI Target", i ? "," : "");
1453                 i++;
1454         }
1455
1456         if (ioc->facts.IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_EEDP) {
1457                 printk("%sEEDP", i ? "," : "");
1458                 i++;
1459         }
1460
1461         if (ioc->facts.IOCCapabilities &
1462             MPI2_IOCFACTS_CAPABILITY_SNAPSHOT_BUFFER) {
1463                 printk("%sSnapshot Buffer", i ? "," : "");
1464                 i++;
1465         }
1466
1467         if (ioc->facts.IOCCapabilities &
1468             MPI2_IOCFACTS_CAPABILITY_DIAG_TRACE_BUFFER) {
1469                 printk("%sDiag Trace Buffer", i ? "," : "");
1470                 i++;
1471         }
1472
1473         if (ioc->facts.IOCCapabilities &
1474             MPI2_IOCFACTS_CAPABILITY_TASK_SET_FULL_HANDLING) {
1475                 printk("%sTask Set Full", i ? "," : "");
1476                 i++;
1477         }
1478
1479         iounit_pg1_flags = le32_to_cpu(ioc->iounit_pg1.Flags);
1480         if (!(iounit_pg1_flags & MPI2_IOUNITPAGE1_NATIVE_COMMAND_Q_DISABLE)) {
1481                 printk("%sNCQ", i ? "," : "");
1482                 i++;
1483         }
1484
1485         printk(")\n");
1486 }
1487
1488 /**
1489  * _base_static_config_pages - static start of day config pages
1490  * @ioc: per adapter object
1491  *
1492  * Return nothing.
1493  */
1494 static void
1495 _base_static_config_pages(struct MPT2SAS_ADAPTER *ioc)
1496 {
1497         Mpi2ConfigReply_t mpi_reply;
1498         u32 iounit_pg1_flags;
1499
1500         mpt2sas_config_get_manufacturing_pg0(ioc, &mpi_reply, &ioc->manu_pg0);
1501         mpt2sas_config_get_bios_pg2(ioc, &mpi_reply, &ioc->bios_pg2);
1502         mpt2sas_config_get_bios_pg3(ioc, &mpi_reply, &ioc->bios_pg3);
1503         mpt2sas_config_get_ioc_pg8(ioc, &mpi_reply, &ioc->ioc_pg8);
1504         mpt2sas_config_get_iounit_pg0(ioc, &mpi_reply, &ioc->iounit_pg0);
1505         mpt2sas_config_get_iounit_pg1(ioc, &mpi_reply, &ioc->iounit_pg1);
1506         _base_display_ioc_capabilities(ioc);
1507
1508         /*
1509          * Enable task_set_full handling in iounit_pg1 when the
1510          * facts capabilities indicate that its supported.
1511          */
1512         iounit_pg1_flags = le32_to_cpu(ioc->iounit_pg1.Flags);
1513         if ((ioc->facts.IOCCapabilities &
1514             MPI2_IOCFACTS_CAPABILITY_TASK_SET_FULL_HANDLING))
1515                 iounit_pg1_flags &=
1516                     ~MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
1517         else
1518                 iounit_pg1_flags |=
1519                     MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
1520         ioc->iounit_pg1.Flags = cpu_to_le32(iounit_pg1_flags);
1521         mpt2sas_config_set_iounit_pg1(ioc, &mpi_reply, ioc->iounit_pg1);
1522 }
1523
1524 /**
1525  * _base_release_memory_pools - release memory
1526  * @ioc: per adapter object
1527  *
1528  * Free memory allocated from _base_allocate_memory_pools.
1529  *
1530  * Return nothing.
1531  */
1532 static void
1533 _base_release_memory_pools(struct MPT2SAS_ADAPTER *ioc)
1534 {
1535         dexitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
1536             __func__));
1537
1538         if (ioc->request) {
1539                 pci_free_consistent(ioc->pdev, ioc->request_dma_sz,
1540                     ioc->request,  ioc->request_dma);
1541                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "request_pool(0x%p)"
1542                     ": free\n", ioc->name, ioc->request));
1543                 ioc->request = NULL;
1544         }
1545
1546         if (ioc->sense) {
1547                 pci_pool_free(ioc->sense_dma_pool, ioc->sense, ioc->sense_dma);
1548                 if (ioc->sense_dma_pool)
1549                         pci_pool_destroy(ioc->sense_dma_pool);
1550                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "sense_pool(0x%p)"
1551                     ": free\n", ioc->name, ioc->sense));
1552                 ioc->sense = NULL;
1553         }
1554
1555         if (ioc->reply) {
1556                 pci_pool_free(ioc->reply_dma_pool, ioc->reply, ioc->reply_dma);
1557                 if (ioc->reply_dma_pool)
1558                         pci_pool_destroy(ioc->reply_dma_pool);
1559                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_pool(0x%p)"
1560                      ": free\n", ioc->name, ioc->reply));
1561                 ioc->reply = NULL;
1562         }
1563
1564         if (ioc->reply_free) {
1565                 pci_pool_free(ioc->reply_free_dma_pool, ioc->reply_free,
1566                     ioc->reply_free_dma);
1567                 if (ioc->reply_free_dma_pool)
1568                         pci_pool_destroy(ioc->reply_free_dma_pool);
1569                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free_pool"
1570                     "(0x%p): free\n", ioc->name, ioc->reply_free));
1571                 ioc->reply_free = NULL;
1572         }
1573
1574         if (ioc->reply_post_free) {
1575                 pci_pool_free(ioc->reply_post_free_dma_pool,
1576                     ioc->reply_post_free, ioc->reply_post_free_dma);
1577                 if (ioc->reply_post_free_dma_pool)
1578                         pci_pool_destroy(ioc->reply_post_free_dma_pool);
1579                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT
1580                     "reply_post_free_pool(0x%p): free\n", ioc->name,
1581                     ioc->reply_post_free));
1582                 ioc->reply_post_free = NULL;
1583         }
1584
1585         if (ioc->config_page) {
1586                 dexitprintk(ioc, printk(MPT2SAS_INFO_FMT
1587                     "config_page(0x%p): free\n", ioc->name,
1588                     ioc->config_page));
1589                 pci_free_consistent(ioc->pdev, ioc->config_page_sz,
1590                     ioc->config_page, ioc->config_page_dma);
1591         }
1592
1593         kfree(ioc->scsi_lookup);
1594 }
1595
1596
1597 /**
1598  * _base_allocate_memory_pools - allocate start of day memory pools
1599  * @ioc: per adapter object
1600  * @sleep_flag: CAN_SLEEP or NO_SLEEP
1601  *
1602  * Returns 0 success, anything else error
1603  */
1604 static int
1605 _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc,  int sleep_flag)
1606 {
1607         Mpi2IOCFactsReply_t *facts;
1608         u32 queue_size, queue_diff;
1609         u16 max_sge_elements;
1610         u16 num_of_reply_frames;
1611         u16 chains_needed_per_io;
1612         u32 sz, total_sz;
1613         u16 i;
1614         u32 retry_sz;
1615         u16 max_request_credit;
1616
1617         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
1618             __func__));
1619
1620         retry_sz = 0;
1621         facts = &ioc->facts;
1622
1623         /* command line tunables  for max sgl entries */
1624         if (max_sgl_entries != -1) {
1625                 ioc->shost->sg_tablesize = (max_sgl_entries <
1626                     MPT2SAS_SG_DEPTH) ? max_sgl_entries :
1627                     MPT2SAS_SG_DEPTH;
1628         } else {
1629                 ioc->shost->sg_tablesize = MPT2SAS_SG_DEPTH;
1630         }
1631
1632         /* command line tunables  for max controller queue depth */
1633         if (max_queue_depth != -1) {
1634                 max_request_credit = (max_queue_depth < facts->RequestCredit)
1635                     ? max_queue_depth : facts->RequestCredit;
1636         } else {
1637                 max_request_credit = (facts->RequestCredit >
1638                     MPT2SAS_MAX_REQUEST_QUEUE) ? MPT2SAS_MAX_REQUEST_QUEUE :
1639                     facts->RequestCredit;
1640         }
1641         ioc->request_depth = max_request_credit;
1642
1643         /* request frame size */
1644         ioc->request_sz = facts->IOCRequestFrameSize * 4;
1645
1646         /* reply frame size */
1647         ioc->reply_sz = facts->ReplyFrameSize * 4;
1648
1649  retry_allocation:
1650         total_sz = 0;
1651         /* calculate number of sg elements left over in the 1st frame */
1652         max_sge_elements = ioc->request_sz - ((sizeof(Mpi2SCSIIORequest_t) -
1653             sizeof(Mpi2SGEIOUnion_t)) + ioc->sge_size);
1654         ioc->max_sges_in_main_message = max_sge_elements/ioc->sge_size;
1655
1656         /* now do the same for a chain buffer */
1657         max_sge_elements = ioc->request_sz - ioc->sge_size;
1658         ioc->max_sges_in_chain_message = max_sge_elements/ioc->sge_size;
1659
1660         ioc->chain_offset_value_for_main_message =
1661             ((sizeof(Mpi2SCSIIORequest_t) - sizeof(Mpi2SGEIOUnion_t)) +
1662              (ioc->max_sges_in_chain_message * ioc->sge_size)) / 4;
1663
1664         /*
1665          *  MPT2SAS_SG_DEPTH = CONFIG_FUSION_MAX_SGE
1666          */
1667         chains_needed_per_io = ((ioc->shost->sg_tablesize -
1668            ioc->max_sges_in_main_message)/ioc->max_sges_in_chain_message)
1669             + 1;
1670         if (chains_needed_per_io > facts->MaxChainDepth) {
1671                 chains_needed_per_io = facts->MaxChainDepth;
1672                 ioc->shost->sg_tablesize = min_t(u16,
1673                 ioc->max_sges_in_main_message + (ioc->max_sges_in_chain_message
1674                 * chains_needed_per_io), ioc->shost->sg_tablesize);
1675         }
1676         ioc->chains_needed_per_io = chains_needed_per_io;
1677
1678         /* reply free queue sizing - taking into account for events */
1679         num_of_reply_frames = ioc->request_depth + 32;
1680
1681         /* number of replies frames can't be a multiple of 16 */
1682         /* decrease number of reply frames by 1 */
1683         if (!(num_of_reply_frames % 16))
1684                 num_of_reply_frames--;
1685
1686         /* calculate number of reply free queue entries
1687          *  (must be multiple of 16)
1688          */
1689
1690         /* (we know reply_free_queue_depth is not a multiple of 16) */
1691         queue_size = num_of_reply_frames;
1692         queue_size += 16 - (queue_size % 16);
1693         ioc->reply_free_queue_depth = queue_size;
1694
1695         /* reply descriptor post queue sizing */
1696         /* this size should be the number of request frames + number of reply
1697          * frames
1698          */
1699
1700         queue_size = ioc->request_depth + num_of_reply_frames + 1;
1701         /* round up to 16 byte boundary */
1702         if (queue_size % 16)
1703                 queue_size += 16 - (queue_size % 16);
1704
1705         /* check against IOC maximum reply post queue depth */
1706         if (queue_size > facts->MaxReplyDescriptorPostQueueDepth) {
1707                 queue_diff = queue_size -
1708                     facts->MaxReplyDescriptorPostQueueDepth;
1709
1710                 /* round queue_diff up to multiple of 16 */
1711                 if (queue_diff % 16)
1712                         queue_diff += 16 - (queue_diff % 16);
1713
1714                 /* adjust request_depth, reply_free_queue_depth,
1715                  * and queue_size
1716                  */
1717                 ioc->request_depth -= queue_diff;
1718                 ioc->reply_free_queue_depth -= queue_diff;
1719                 queue_size -= queue_diff;
1720         }
1721         ioc->reply_post_queue_depth = queue_size;
1722
1723         /* max scsi host queue depth */
1724         ioc->shost->can_queue = ioc->request_depth - INTERNAL_CMDS_COUNT;
1725         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "scsi host queue: depth"
1726             "(%d)\n", ioc->name, ioc->shost->can_queue));
1727
1728         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "scatter gather: "
1729             "sge_in_main_msg(%d), sge_per_chain(%d), sge_per_io(%d), "
1730             "chains_per_io(%d)\n", ioc->name, ioc->max_sges_in_main_message,
1731             ioc->max_sges_in_chain_message, ioc->shost->sg_tablesize,
1732             ioc->chains_needed_per_io));
1733
1734         /* contiguous pool for request and chains, 16 byte align, one extra "
1735          * "frame for smid=0
1736          */
1737         ioc->chain_depth = ioc->chains_needed_per_io * ioc->request_depth;
1738         sz = ((ioc->request_depth + 1 + ioc->chain_depth) * ioc->request_sz);
1739
1740         ioc->request_dma_sz = sz;
1741         ioc->request = pci_alloc_consistent(ioc->pdev, sz, &ioc->request_dma);
1742         if (!ioc->request) {
1743                 printk(MPT2SAS_ERR_FMT "request pool: pci_alloc_consistent "
1744                     "failed: req_depth(%d), chains_per_io(%d), frame_sz(%d), "
1745                     "total(%d kB)\n", ioc->name, ioc->request_depth,
1746                     ioc->chains_needed_per_io, ioc->request_sz, sz/1024);
1747                 if (ioc->request_depth < MPT2SAS_SAS_QUEUE_DEPTH)
1748                         goto out;
1749                 retry_sz += 64;
1750                 ioc->request_depth = max_request_credit - retry_sz;
1751                 goto retry_allocation;
1752         }
1753
1754         if (retry_sz)
1755                 printk(MPT2SAS_ERR_FMT "request pool: pci_alloc_consistent "
1756                     "succeed: req_depth(%d), chains_per_io(%d), frame_sz(%d), "
1757                     "total(%d kb)\n", ioc->name, ioc->request_depth,
1758                     ioc->chains_needed_per_io, ioc->request_sz, sz/1024);
1759
1760         ioc->chain = ioc->request + ((ioc->request_depth + 1) *
1761             ioc->request_sz);
1762         ioc->chain_dma = ioc->request_dma + ((ioc->request_depth + 1) *
1763             ioc->request_sz);
1764         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request pool(0x%p): "
1765             "depth(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name,
1766             ioc->request, ioc->request_depth, ioc->request_sz,
1767             ((ioc->request_depth + 1) * ioc->request_sz)/1024));
1768         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "chain pool(0x%p): depth"
1769             "(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name, ioc->chain,
1770             ioc->chain_depth, ioc->request_sz, ((ioc->chain_depth *
1771             ioc->request_sz))/1024));
1772         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request pool: dma(0x%llx)\n",
1773             ioc->name, (unsigned long long) ioc->request_dma));
1774         total_sz += sz;
1775
1776         ioc->scsi_lookup = kcalloc(ioc->request_depth,
1777             sizeof(struct request_tracker), GFP_KERNEL);
1778         if (!ioc->scsi_lookup) {
1779                 printk(MPT2SAS_ERR_FMT "scsi_lookup: kcalloc failed\n",
1780                     ioc->name);
1781                 goto out;
1782         }
1783
1784          /* initialize some bits */
1785         for (i = 0; i < ioc->request_depth; i++)
1786                 ioc->scsi_lookup[i].smid = i + 1;
1787
1788         /* sense buffers, 4 byte align */
1789         sz = ioc->request_depth * SCSI_SENSE_BUFFERSIZE;
1790         ioc->sense_dma_pool = pci_pool_create("sense pool", ioc->pdev, sz, 4,
1791             0);
1792         if (!ioc->sense_dma_pool) {
1793                 printk(MPT2SAS_ERR_FMT "sense pool: pci_pool_create failed\n",
1794                     ioc->name);
1795                 goto out;
1796         }
1797         ioc->sense = pci_pool_alloc(ioc->sense_dma_pool , GFP_KERNEL,
1798             &ioc->sense_dma);
1799         if (!ioc->sense) {
1800                 printk(MPT2SAS_ERR_FMT "sense pool: pci_pool_alloc failed\n",
1801                     ioc->name);
1802                 goto out;
1803         }
1804         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT
1805             "sense pool(0x%p): depth(%d), element_size(%d), pool_size"
1806             "(%d kB)\n", ioc->name, ioc->sense, ioc->request_depth,
1807             SCSI_SENSE_BUFFERSIZE, sz/1024));
1808         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "sense_dma(0x%llx)\n",
1809             ioc->name, (unsigned long long)ioc->sense_dma));
1810         total_sz += sz;
1811
1812         /* reply pool, 4 byte align */
1813         sz = ioc->reply_free_queue_depth * ioc->reply_sz;
1814         ioc->reply_dma_pool = pci_pool_create("reply pool", ioc->pdev, sz, 4,
1815             0);
1816         if (!ioc->reply_dma_pool) {
1817                 printk(MPT2SAS_ERR_FMT "reply pool: pci_pool_create failed\n",
1818                     ioc->name);
1819                 goto out;
1820         }
1821         ioc->reply = pci_pool_alloc(ioc->reply_dma_pool , GFP_KERNEL,
1822             &ioc->reply_dma);
1823         if (!ioc->reply) {
1824                 printk(MPT2SAS_ERR_FMT "reply pool: pci_pool_alloc failed\n",
1825                     ioc->name);
1826                 goto out;
1827         }
1828         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply pool(0x%p): depth"
1829             "(%d), frame_size(%d), pool_size(%d kB)\n", ioc->name, ioc->reply,
1830             ioc->reply_free_queue_depth, ioc->reply_sz, sz/1024));
1831         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_dma(0x%llx)\n",
1832             ioc->name, (unsigned long long)ioc->reply_dma));
1833         total_sz += sz;
1834
1835         /* reply free queue, 16 byte align */
1836         sz = ioc->reply_free_queue_depth * 4;
1837         ioc->reply_free_dma_pool = pci_pool_create("reply_free pool",
1838             ioc->pdev, sz, 16, 0);
1839         if (!ioc->reply_free_dma_pool) {
1840                 printk(MPT2SAS_ERR_FMT "reply_free pool: pci_pool_create "
1841                     "failed\n", ioc->name);
1842                 goto out;
1843         }
1844         ioc->reply_free = pci_pool_alloc(ioc->reply_free_dma_pool , GFP_KERNEL,
1845             &ioc->reply_free_dma);
1846         if (!ioc->reply_free) {
1847                 printk(MPT2SAS_ERR_FMT "reply_free pool: pci_pool_alloc "
1848                     "failed\n", ioc->name);
1849                 goto out;
1850         }
1851         memset(ioc->reply_free, 0, sz);
1852         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free pool(0x%p): "
1853             "depth(%d), element_size(%d), pool_size(%d kB)\n", ioc->name,
1854             ioc->reply_free, ioc->reply_free_queue_depth, 4, sz/1024));
1855         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_free_dma"
1856             "(0x%llx)\n", ioc->name, (unsigned long long)ioc->reply_free_dma));
1857         total_sz += sz;
1858
1859         /* reply post queue, 16 byte align */
1860         sz = ioc->reply_post_queue_depth * sizeof(Mpi2DefaultReplyDescriptor_t);
1861         ioc->reply_post_free_dma_pool = pci_pool_create("reply_post_free pool",
1862             ioc->pdev, sz, 16, 0);
1863         if (!ioc->reply_post_free_dma_pool) {
1864                 printk(MPT2SAS_ERR_FMT "reply_post_free pool: pci_pool_create "
1865                     "failed\n", ioc->name);
1866                 goto out;
1867         }
1868         ioc->reply_post_free = pci_pool_alloc(ioc->reply_post_free_dma_pool ,
1869             GFP_KERNEL, &ioc->reply_post_free_dma);
1870         if (!ioc->reply_post_free) {
1871                 printk(MPT2SAS_ERR_FMT "reply_post_free pool: pci_pool_alloc "
1872                     "failed\n", ioc->name);
1873                 goto out;
1874         }
1875         memset(ioc->reply_post_free, 0, sz);
1876         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply post free pool"
1877             "(0x%p): depth(%d), element_size(%d), pool_size(%d kB)\n",
1878             ioc->name, ioc->reply_post_free, ioc->reply_post_queue_depth, 8,
1879             sz/1024));
1880         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "reply_post_free_dma = "
1881             "(0x%llx)\n", ioc->name, (unsigned long long)
1882             ioc->reply_post_free_dma));
1883         total_sz += sz;
1884
1885         ioc->config_page_sz = 512;
1886         ioc->config_page = pci_alloc_consistent(ioc->pdev,
1887             ioc->config_page_sz, &ioc->config_page_dma);
1888         if (!ioc->config_page) {
1889                 printk(MPT2SAS_ERR_FMT "config page: pci_pool_alloc "
1890                     "failed\n", ioc->name);
1891                 goto out;
1892         }
1893         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "config page(0x%p): size"
1894             "(%d)\n", ioc->name, ioc->config_page, ioc->config_page_sz));
1895         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "config_page_dma"
1896             "(0x%llx)\n", ioc->name, (unsigned long long)ioc->config_page_dma));
1897         total_sz += ioc->config_page_sz;
1898
1899         printk(MPT2SAS_INFO_FMT "Allocated physical memory: size(%d kB)\n",
1900             ioc->name, total_sz/1024);
1901         printk(MPT2SAS_INFO_FMT "Current Controller Queue Depth(%d), "
1902             "Max Controller Queue Depth(%d)\n",
1903             ioc->name, ioc->shost->can_queue, facts->RequestCredit);
1904         printk(MPT2SAS_INFO_FMT "Scatter Gather Elements per IO(%d)\n",
1905             ioc->name, ioc->shost->sg_tablesize);
1906         return 0;
1907
1908  out:
1909         _base_release_memory_pools(ioc);
1910         return -ENOMEM;
1911 }
1912
1913
1914 /**
1915  * mpt2sas_base_get_iocstate - Get the current state of a MPT adapter.
1916  * @ioc: Pointer to MPT_ADAPTER structure
1917  * @cooked: Request raw or cooked IOC state
1918  *
1919  * Returns all IOC Doorbell register bits if cooked==0, else just the
1920  * Doorbell bits in MPI_IOC_STATE_MASK.
1921  */
1922 u32
1923 mpt2sas_base_get_iocstate(struct MPT2SAS_ADAPTER *ioc, int cooked)
1924 {
1925         u32 s, sc;
1926
1927         s = readl(&ioc->chip->Doorbell);
1928         sc = s & MPI2_IOC_STATE_MASK;
1929         return cooked ? sc : s;
1930 }
1931
1932 /**
1933  * _base_wait_on_iocstate - waiting on a particular ioc state
1934  * @ioc_state: controller state { READY, OPERATIONAL, or RESET }
1935  * @timeout: timeout in second
1936  * @sleep_flag: CAN_SLEEP or NO_SLEEP
1937  *
1938  * Returns 0 for success, non-zero for failure.
1939  */
1940 static int
1941 _base_wait_on_iocstate(struct MPT2SAS_ADAPTER *ioc, u32 ioc_state, int timeout,
1942     int sleep_flag)
1943 {
1944         u32 count, cntdn;
1945         u32 current_state;
1946
1947         count = 0;
1948         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
1949         do {
1950                 current_state = mpt2sas_base_get_iocstate(ioc, 1);
1951                 if (current_state == ioc_state)
1952                         return 0;
1953                 if (count && current_state == MPI2_IOC_STATE_FAULT)
1954                         break;
1955                 if (sleep_flag == CAN_SLEEP)
1956                         msleep(1);
1957                 else
1958                         udelay(500);
1959                 count++;
1960         } while (--cntdn);
1961
1962         return current_state;
1963 }
1964
1965 /**
1966  * _base_wait_for_doorbell_int - waiting for controller interrupt(generated by
1967  * a write to the doorbell)
1968  * @ioc: per adapter object
1969  * @timeout: timeout in second
1970  * @sleep_flag: CAN_SLEEP or NO_SLEEP
1971  *
1972  * Returns 0 for success, non-zero for failure.
1973  *
1974  * Notes: MPI2_HIS_IOC2SYS_DB_STATUS - set to one when IOC writes to doorbell.
1975  */
1976 static int
1977 _base_wait_for_doorbell_int(struct MPT2SAS_ADAPTER *ioc, int timeout,
1978     int sleep_flag)
1979 {
1980         u32 cntdn, count;
1981         u32 int_status;
1982
1983         count = 0;
1984         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
1985         do {
1986                 int_status = readl(&ioc->chip->HostInterruptStatus);
1987                 if (int_status & MPI2_HIS_IOC2SYS_DB_STATUS) {
1988                         dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
1989                             "successfull count(%d), timeout(%d)\n", ioc->name,
1990                             __func__, count, timeout));
1991                         return 0;
1992                 }
1993                 if (sleep_flag == CAN_SLEEP)
1994                         msleep(1);
1995                 else
1996                         udelay(500);
1997                 count++;
1998         } while (--cntdn);
1999
2000         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2001             "int_status(%x)!\n", ioc->name, __func__, count, int_status);
2002         return -EFAULT;
2003 }
2004
2005 /**
2006  * _base_wait_for_doorbell_ack - waiting for controller to read the doorbell.
2007  * @ioc: per adapter object
2008  * @timeout: timeout in second
2009  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2010  *
2011  * Returns 0 for success, non-zero for failure.
2012  *
2013  * Notes: MPI2_HIS_SYS2IOC_DB_STATUS - set to one when host writes to
2014  * doorbell.
2015  */
2016 static int
2017 _base_wait_for_doorbell_ack(struct MPT2SAS_ADAPTER *ioc, int timeout,
2018     int sleep_flag)
2019 {
2020         u32 cntdn, count;
2021         u32 int_status;
2022         u32 doorbell;
2023
2024         count = 0;
2025         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2026         do {
2027                 int_status = readl(&ioc->chip->HostInterruptStatus);
2028                 if (!(int_status & MPI2_HIS_SYS2IOC_DB_STATUS)) {
2029                         dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
2030                             "successfull count(%d), timeout(%d)\n", ioc->name,
2031                             __func__, count, timeout));
2032                         return 0;
2033                 } else if (int_status & MPI2_HIS_IOC2SYS_DB_STATUS) {
2034                         doorbell = readl(&ioc->chip->Doorbell);
2035                         if ((doorbell & MPI2_IOC_STATE_MASK) ==
2036                             MPI2_IOC_STATE_FAULT) {
2037                                 mpt2sas_base_fault_info(ioc , doorbell);
2038                                 return -EFAULT;
2039                         }
2040                 } else if (int_status == 0xFFFFFFFF)
2041                         goto out;
2042
2043                 if (sleep_flag == CAN_SLEEP)
2044                         msleep(1);
2045                 else
2046                         udelay(500);
2047                 count++;
2048         } while (--cntdn);
2049
2050  out:
2051         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2052             "int_status(%x)!\n", ioc->name, __func__, count, int_status);
2053         return -EFAULT;
2054 }
2055
2056 /**
2057  * _base_wait_for_doorbell_not_used - waiting for doorbell to not be in use
2058  * @ioc: per adapter object
2059  * @timeout: timeout in second
2060  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2061  *
2062  * Returns 0 for success, non-zero for failure.
2063  *
2064  */
2065 static int
2066 _base_wait_for_doorbell_not_used(struct MPT2SAS_ADAPTER *ioc, int timeout,
2067     int sleep_flag)
2068 {
2069         u32 cntdn, count;
2070         u32 doorbell_reg;
2071
2072         count = 0;
2073         cntdn = (sleep_flag == CAN_SLEEP) ? 1000*timeout : 2000*timeout;
2074         do {
2075                 doorbell_reg = readl(&ioc->chip->Doorbell);
2076                 if (!(doorbell_reg & MPI2_DOORBELL_USED)) {
2077                         dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
2078                             "successfull count(%d), timeout(%d)\n", ioc->name,
2079                             __func__, count, timeout));
2080                         return 0;
2081                 }
2082                 if (sleep_flag == CAN_SLEEP)
2083                         msleep(1);
2084                 else
2085                         udelay(500);
2086                 count++;
2087         } while (--cntdn);
2088
2089         printk(MPT2SAS_ERR_FMT "%s: failed due to timeout count(%d), "
2090             "doorbell_reg(%x)!\n", ioc->name, __func__, count, doorbell_reg);
2091         return -EFAULT;
2092 }
2093
2094 /**
2095  * _base_send_ioc_reset - send doorbell reset
2096  * @ioc: per adapter object
2097  * @reset_type: currently only supports: MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET
2098  * @timeout: timeout in second
2099  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2100  *
2101  * Returns 0 for success, non-zero for failure.
2102  */
2103 static int
2104 _base_send_ioc_reset(struct MPT2SAS_ADAPTER *ioc, u8 reset_type, int timeout,
2105     int sleep_flag)
2106 {
2107         u32 ioc_state;
2108         int r = 0;
2109
2110         if (reset_type != MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET) {
2111                 printk(MPT2SAS_ERR_FMT "%s: unknown reset_type\n",
2112                     ioc->name, __func__);
2113                 return -EFAULT;
2114         }
2115
2116         if (!(ioc->facts.IOCCapabilities &
2117            MPI2_IOCFACTS_CAPABILITY_EVENT_REPLAY))
2118                 return -EFAULT;
2119
2120         printk(MPT2SAS_INFO_FMT "sending message unit reset !!\n", ioc->name);
2121
2122         writel(reset_type << MPI2_DOORBELL_FUNCTION_SHIFT,
2123             &ioc->chip->Doorbell);
2124         if ((_base_wait_for_doorbell_ack(ioc, 15, sleep_flag))) {
2125                 r = -EFAULT;
2126                 goto out;
2127         }
2128         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_READY,
2129             timeout, sleep_flag);
2130         if (ioc_state) {
2131                 printk(MPT2SAS_ERR_FMT "%s: failed going to ready state "
2132                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
2133                 r = -EFAULT;
2134                 goto out;
2135         }
2136  out:
2137         printk(MPT2SAS_INFO_FMT "message unit reset: %s\n",
2138             ioc->name, ((r == 0) ? "SUCCESS" : "FAILED"));
2139         return r;
2140 }
2141
2142 /**
2143  * _base_handshake_req_reply_wait - send request thru doorbell interface
2144  * @ioc: per adapter object
2145  * @request_bytes: request length
2146  * @request: pointer having request payload
2147  * @reply_bytes: reply length
2148  * @reply: pointer to reply payload
2149  * @timeout: timeout in second
2150  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2151  *
2152  * Returns 0 for success, non-zero for failure.
2153  */
2154 static int
2155 _base_handshake_req_reply_wait(struct MPT2SAS_ADAPTER *ioc, int request_bytes,
2156     u32 *request, int reply_bytes, u16 *reply, int timeout, int sleep_flag)
2157 {
2158         MPI2DefaultReply_t *default_reply = (MPI2DefaultReply_t *)reply;
2159         int i;
2160         u8 failed;
2161         u16 dummy;
2162         u32 *mfp;
2163
2164         /* make sure doorbell is not in use */
2165         if ((readl(&ioc->chip->Doorbell) & MPI2_DOORBELL_USED)) {
2166                 printk(MPT2SAS_ERR_FMT "doorbell is in use "
2167                     " (line=%d)\n", ioc->name, __LINE__);
2168                 return -EFAULT;
2169         }
2170
2171         /* clear pending doorbell interrupts from previous state changes */
2172         if (readl(&ioc->chip->HostInterruptStatus) &
2173             MPI2_HIS_IOC2SYS_DB_STATUS)
2174                 writel(0, &ioc->chip->HostInterruptStatus);
2175
2176         /* send message to ioc */
2177         writel(((MPI2_FUNCTION_HANDSHAKE<<MPI2_DOORBELL_FUNCTION_SHIFT) |
2178             ((request_bytes/4)<<MPI2_DOORBELL_ADD_DWORDS_SHIFT)),
2179             &ioc->chip->Doorbell);
2180
2181         if ((_base_wait_for_doorbell_int(ioc, 5, sleep_flag))) {
2182                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2183                    "int failed (line=%d)\n", ioc->name, __LINE__);
2184                 return -EFAULT;
2185         }
2186         writel(0, &ioc->chip->HostInterruptStatus);
2187
2188         if ((_base_wait_for_doorbell_ack(ioc, 5, sleep_flag))) {
2189                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2190                     "ack failed (line=%d)\n", ioc->name, __LINE__);
2191                 return -EFAULT;
2192         }
2193
2194         /* send message 32-bits at a time */
2195         for (i = 0, failed = 0; i < request_bytes/4 && !failed; i++) {
2196                 writel(cpu_to_le32(request[i]), &ioc->chip->Doorbell);
2197                 if ((_base_wait_for_doorbell_ack(ioc, 5, sleep_flag)))
2198                         failed = 1;
2199         }
2200
2201         if (failed) {
2202                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2203                     "sending request failed (line=%d)\n", ioc->name, __LINE__);
2204                 return -EFAULT;
2205         }
2206
2207         /* now wait for the reply */
2208         if ((_base_wait_for_doorbell_int(ioc, timeout, sleep_flag))) {
2209                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2210                    "int failed (line=%d)\n", ioc->name, __LINE__);
2211                 return -EFAULT;
2212         }
2213
2214         /* read the first two 16-bits, it gives the total length of the reply */
2215         reply[0] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2216             & MPI2_DOORBELL_DATA_MASK);
2217         writel(0, &ioc->chip->HostInterruptStatus);
2218         if ((_base_wait_for_doorbell_int(ioc, 5, sleep_flag))) {
2219                 printk(MPT2SAS_ERR_FMT "doorbell handshake "
2220                    "int failed (line=%d)\n", ioc->name, __LINE__);
2221                 return -EFAULT;
2222         }
2223         reply[1] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2224             & MPI2_DOORBELL_DATA_MASK);
2225         writel(0, &ioc->chip->HostInterruptStatus);
2226
2227         for (i = 2; i < default_reply->MsgLength * 2; i++)  {
2228                 if ((_base_wait_for_doorbell_int(ioc, 5, sleep_flag))) {
2229                         printk(MPT2SAS_ERR_FMT "doorbell "
2230                             "handshake int failed (line=%d)\n", ioc->name,
2231                             __LINE__);
2232                         return -EFAULT;
2233                 }
2234                 if (i >=  reply_bytes/2) /* overflow case */
2235                         dummy = readl(&ioc->chip->Doorbell);
2236                 else
2237                         reply[i] = le16_to_cpu(readl(&ioc->chip->Doorbell)
2238                             & MPI2_DOORBELL_DATA_MASK);
2239                 writel(0, &ioc->chip->HostInterruptStatus);
2240         }
2241
2242         _base_wait_for_doorbell_int(ioc, 5, sleep_flag);
2243         if (_base_wait_for_doorbell_not_used(ioc, 5, sleep_flag) != 0) {
2244                 dhsprintk(ioc, printk(MPT2SAS_INFO_FMT "doorbell is in use "
2245                     " (line=%d)\n", ioc->name, __LINE__));
2246         }
2247         writel(0, &ioc->chip->HostInterruptStatus);
2248
2249         if (ioc->logging_level & MPT_DEBUG_INIT) {
2250                 mfp = (u32 *)reply;
2251                 printk(KERN_DEBUG "\toffset:data\n");
2252                 for (i = 0; i < reply_bytes/4; i++)
2253                         printk(KERN_DEBUG "\t[0x%02x]:%08x\n", i*4,
2254                             le32_to_cpu(mfp[i]));
2255         }
2256         return 0;
2257 }
2258
2259 /**
2260  * mpt2sas_base_sas_iounit_control - send sas iounit control to FW
2261  * @ioc: per adapter object
2262  * @mpi_reply: the reply payload from FW
2263  * @mpi_request: the request payload sent to FW
2264  *
2265  * The SAS IO Unit Control Request message allows the host to perform low-level
2266  * operations, such as resets on the PHYs of the IO Unit, also allows the host
2267  * to obtain the IOC assigned device handles for a device if it has other
2268  * identifying information about the device, in addition allows the host to
2269  * remove IOC resources associated with the device.
2270  *
2271  * Returns 0 for success, non-zero for failure.
2272  */
2273 int
2274 mpt2sas_base_sas_iounit_control(struct MPT2SAS_ADAPTER *ioc,
2275     Mpi2SasIoUnitControlReply_t *mpi_reply,
2276     Mpi2SasIoUnitControlRequest_t *mpi_request)
2277 {
2278         u16 smid;
2279         u32 ioc_state;
2280         unsigned long timeleft;
2281         u8 issue_reset;
2282         int rc;
2283         void *request;
2284         u16 wait_state_count;
2285
2286         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2287             __func__));
2288
2289         mutex_lock(&ioc->base_cmds.mutex);
2290
2291         if (ioc->base_cmds.status != MPT2_CMD_NOT_USED) {
2292                 printk(MPT2SAS_ERR_FMT "%s: base_cmd in use\n",
2293                     ioc->name, __func__);
2294                 rc = -EAGAIN;
2295                 goto out;
2296         }
2297
2298         wait_state_count = 0;
2299         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2300         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2301                 if (wait_state_count++ == 10) {
2302                         printk(MPT2SAS_ERR_FMT
2303                             "%s: failed due to ioc not operational\n",
2304                             ioc->name, __func__);
2305                         rc = -EFAULT;
2306                         goto out;
2307                 }
2308                 ssleep(1);
2309                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2310                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
2311                     "operational state(count=%d)\n", ioc->name,
2312                     __func__, wait_state_count);
2313         }
2314
2315         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2316         if (!smid) {
2317                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2318                     ioc->name, __func__);
2319                 rc = -EAGAIN;
2320                 goto out;
2321         }
2322
2323         rc = 0;
2324         ioc->base_cmds.status = MPT2_CMD_PENDING;
2325         request = mpt2sas_base_get_msg_frame(ioc, smid);
2326         ioc->base_cmds.smid = smid;
2327         memcpy(request, mpi_request, sizeof(Mpi2SasIoUnitControlRequest_t));
2328         if (mpi_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET ||
2329             mpi_request->Operation == MPI2_SAS_OP_PHY_LINK_RESET)
2330                 ioc->ioc_link_reset_in_progress = 1;
2331         mpt2sas_base_put_smid_default(ioc, smid, mpi_request->VF_ID);
2332         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
2333             msecs_to_jiffies(10000));
2334         if ((mpi_request->Operation == MPI2_SAS_OP_PHY_HARD_RESET ||
2335             mpi_request->Operation == MPI2_SAS_OP_PHY_LINK_RESET) &&
2336             ioc->ioc_link_reset_in_progress)
2337                 ioc->ioc_link_reset_in_progress = 0;
2338         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2339                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2340                     ioc->name, __func__);
2341                 _debug_dump_mf(mpi_request,
2342                     sizeof(Mpi2SasIoUnitControlRequest_t)/4);
2343                 if (!(ioc->base_cmds.status & MPT2_CMD_RESET))
2344                         issue_reset = 1;
2345                 goto issue_host_reset;
2346         }
2347         if (ioc->base_cmds.status & MPT2_CMD_REPLY_VALID)
2348                 memcpy(mpi_reply, ioc->base_cmds.reply,
2349                     sizeof(Mpi2SasIoUnitControlReply_t));
2350         else
2351                 memset(mpi_reply, 0, sizeof(Mpi2SasIoUnitControlReply_t));
2352         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2353         goto out;
2354
2355  issue_host_reset:
2356         if (issue_reset)
2357                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2358                     FORCE_BIG_HAMMER);
2359         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2360         rc = -EFAULT;
2361  out:
2362         mutex_unlock(&ioc->base_cmds.mutex);
2363         return rc;
2364 }
2365
2366
2367 /**
2368  * mpt2sas_base_scsi_enclosure_processor - sending request to sep device
2369  * @ioc: per adapter object
2370  * @mpi_reply: the reply payload from FW
2371  * @mpi_request: the request payload sent to FW
2372  *
2373  * The SCSI Enclosure Processor request message causes the IOC to
2374  * communicate with SES devices to control LED status signals.
2375  *
2376  * Returns 0 for success, non-zero for failure.
2377  */
2378 int
2379 mpt2sas_base_scsi_enclosure_processor(struct MPT2SAS_ADAPTER *ioc,
2380     Mpi2SepReply_t *mpi_reply, Mpi2SepRequest_t *mpi_request)
2381 {
2382         u16 smid;
2383         u32 ioc_state;
2384         unsigned long timeleft;
2385         u8 issue_reset;
2386         int rc;
2387         void *request;
2388         u16 wait_state_count;
2389
2390         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2391             __func__));
2392
2393         mutex_lock(&ioc->base_cmds.mutex);
2394
2395         if (ioc->base_cmds.status != MPT2_CMD_NOT_USED) {
2396                 printk(MPT2SAS_ERR_FMT "%s: base_cmd in use\n",
2397                     ioc->name, __func__);
2398                 rc = -EAGAIN;
2399                 goto out;
2400         }
2401
2402         wait_state_count = 0;
2403         ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2404         while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
2405                 if (wait_state_count++ == 10) {
2406                         printk(MPT2SAS_ERR_FMT
2407                             "%s: failed due to ioc not operational\n",
2408                             ioc->name, __func__);
2409                         rc = -EFAULT;
2410                         goto out;
2411                 }
2412                 ssleep(1);
2413                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
2414                 printk(MPT2SAS_INFO_FMT "%s: waiting for "
2415                     "operational state(count=%d)\n", ioc->name,
2416                     __func__, wait_state_count);
2417         }
2418
2419         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2420         if (!smid) {
2421                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2422                     ioc->name, __func__);
2423                 rc = -EAGAIN;
2424                 goto out;
2425         }
2426
2427         rc = 0;
2428         ioc->base_cmds.status = MPT2_CMD_PENDING;
2429         request = mpt2sas_base_get_msg_frame(ioc, smid);
2430         ioc->base_cmds.smid = smid;
2431         memcpy(request, mpi_request, sizeof(Mpi2SepReply_t));
2432         mpt2sas_base_put_smid_default(ioc, smid, mpi_request->VF_ID);
2433         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
2434             msecs_to_jiffies(10000));
2435         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2436                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2437                     ioc->name, __func__);
2438                 _debug_dump_mf(mpi_request,
2439                     sizeof(Mpi2SepRequest_t)/4);
2440                 if (!(ioc->base_cmds.status & MPT2_CMD_RESET))
2441                         issue_reset = 1;
2442                 goto issue_host_reset;
2443         }
2444         if (ioc->base_cmds.status & MPT2_CMD_REPLY_VALID)
2445                 memcpy(mpi_reply, ioc->base_cmds.reply,
2446                     sizeof(Mpi2SepReply_t));
2447         else
2448                 memset(mpi_reply, 0, sizeof(Mpi2SepReply_t));
2449         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2450         goto out;
2451
2452  issue_host_reset:
2453         if (issue_reset)
2454                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
2455                     FORCE_BIG_HAMMER);
2456         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2457         rc = -EFAULT;
2458  out:
2459         mutex_unlock(&ioc->base_cmds.mutex);
2460         return rc;
2461 }
2462
2463 /**
2464  * _base_get_port_facts - obtain port facts reply and save in ioc
2465  * @ioc: per adapter object
2466  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2467  *
2468  * Returns 0 for success, non-zero for failure.
2469  */
2470 static int
2471 _base_get_port_facts(struct MPT2SAS_ADAPTER *ioc, int port, int sleep_flag)
2472 {
2473         Mpi2PortFactsRequest_t mpi_request;
2474         Mpi2PortFactsReply_t mpi_reply, *pfacts;
2475         int mpi_reply_sz, mpi_request_sz, r;
2476
2477         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2478             __func__));
2479
2480         mpi_reply_sz = sizeof(Mpi2PortFactsReply_t);
2481         mpi_request_sz = sizeof(Mpi2PortFactsRequest_t);
2482         memset(&mpi_request, 0, mpi_request_sz);
2483         mpi_request.Function = MPI2_FUNCTION_PORT_FACTS;
2484         mpi_request.PortNumber = port;
2485         r = _base_handshake_req_reply_wait(ioc, mpi_request_sz,
2486             (u32 *)&mpi_request, mpi_reply_sz, (u16 *)&mpi_reply, 5, CAN_SLEEP);
2487
2488         if (r != 0) {
2489                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
2490                     ioc->name, __func__, r);
2491                 return r;
2492         }
2493
2494         pfacts = &ioc->pfacts[port];
2495         memset(pfacts, 0, sizeof(Mpi2PortFactsReply_t));
2496         pfacts->PortNumber = mpi_reply.PortNumber;
2497         pfacts->VP_ID = mpi_reply.VP_ID;
2498         pfacts->VF_ID = mpi_reply.VF_ID;
2499         pfacts->MaxPostedCmdBuffers =
2500             le16_to_cpu(mpi_reply.MaxPostedCmdBuffers);
2501
2502         return 0;
2503 }
2504
2505 /**
2506  * _base_get_ioc_facts - obtain ioc facts reply and save in ioc
2507  * @ioc: per adapter object
2508  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2509  *
2510  * Returns 0 for success, non-zero for failure.
2511  */
2512 static int
2513 _base_get_ioc_facts(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
2514 {
2515         Mpi2IOCFactsRequest_t mpi_request;
2516         Mpi2IOCFactsReply_t mpi_reply, *facts;
2517         int mpi_reply_sz, mpi_request_sz, r;
2518
2519         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2520             __func__));
2521
2522         mpi_reply_sz = sizeof(Mpi2IOCFactsReply_t);
2523         mpi_request_sz = sizeof(Mpi2IOCFactsRequest_t);
2524         memset(&mpi_request, 0, mpi_request_sz);
2525         mpi_request.Function = MPI2_FUNCTION_IOC_FACTS;
2526         r = _base_handshake_req_reply_wait(ioc, mpi_request_sz,
2527             (u32 *)&mpi_request, mpi_reply_sz, (u16 *)&mpi_reply, 5, CAN_SLEEP);
2528
2529         if (r != 0) {
2530                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
2531                     ioc->name, __func__, r);
2532                 return r;
2533         }
2534
2535         facts = &ioc->facts;
2536         memset(facts, 0, sizeof(Mpi2IOCFactsReply_t));
2537         facts->MsgVersion = le16_to_cpu(mpi_reply.MsgVersion);
2538         facts->HeaderVersion = le16_to_cpu(mpi_reply.HeaderVersion);
2539         facts->VP_ID = mpi_reply.VP_ID;
2540         facts->VF_ID = mpi_reply.VF_ID;
2541         facts->IOCExceptions = le16_to_cpu(mpi_reply.IOCExceptions);
2542         facts->MaxChainDepth = mpi_reply.MaxChainDepth;
2543         facts->WhoInit = mpi_reply.WhoInit;
2544         facts->NumberOfPorts = mpi_reply.NumberOfPorts;
2545         facts->RequestCredit = le16_to_cpu(mpi_reply.RequestCredit);
2546         facts->MaxReplyDescriptorPostQueueDepth =
2547             le16_to_cpu(mpi_reply.MaxReplyDescriptorPostQueueDepth);
2548         facts->ProductID = le16_to_cpu(mpi_reply.ProductID);
2549         facts->IOCCapabilities = le32_to_cpu(mpi_reply.IOCCapabilities);
2550         if ((facts->IOCCapabilities & MPI2_IOCFACTS_CAPABILITY_INTEGRATED_RAID))
2551                 ioc->ir_firmware = 1;
2552         facts->FWVersion.Word = le32_to_cpu(mpi_reply.FWVersion.Word);
2553         facts->IOCRequestFrameSize =
2554             le16_to_cpu(mpi_reply.IOCRequestFrameSize);
2555         facts->MaxInitiators = le16_to_cpu(mpi_reply.MaxInitiators);
2556         facts->MaxTargets = le16_to_cpu(mpi_reply.MaxTargets);
2557         ioc->shost->max_id = -1;
2558         facts->MaxSasExpanders = le16_to_cpu(mpi_reply.MaxSasExpanders);
2559         facts->MaxEnclosures = le16_to_cpu(mpi_reply.MaxEnclosures);
2560         facts->ProtocolFlags = le16_to_cpu(mpi_reply.ProtocolFlags);
2561         facts->HighPriorityCredit =
2562             le16_to_cpu(mpi_reply.HighPriorityCredit);
2563         facts->ReplyFrameSize = mpi_reply.ReplyFrameSize;
2564         facts->MaxDevHandle = le16_to_cpu(mpi_reply.MaxDevHandle);
2565
2566         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "hba queue depth(%d), "
2567             "max chains per io(%d)\n", ioc->name, facts->RequestCredit,
2568             facts->MaxChainDepth));
2569         dinitprintk(ioc, printk(MPT2SAS_INFO_FMT "request frame size(%d), "
2570             "reply frame size(%d)\n", ioc->name,
2571             facts->IOCRequestFrameSize * 4, facts->ReplyFrameSize * 4));
2572         return 0;
2573 }
2574
2575 /**
2576  * _base_send_ioc_init - send ioc_init to firmware
2577  * @ioc: per adapter object
2578  * @VF_ID: virtual function id
2579  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2580  *
2581  * Returns 0 for success, non-zero for failure.
2582  */
2583 static int
2584 _base_send_ioc_init(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID, int sleep_flag)
2585 {
2586         Mpi2IOCInitRequest_t mpi_request;
2587         Mpi2IOCInitReply_t mpi_reply;
2588         int r;
2589
2590         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2591             __func__));
2592
2593         memset(&mpi_request, 0, sizeof(Mpi2IOCInitRequest_t));
2594         mpi_request.Function = MPI2_FUNCTION_IOC_INIT;
2595         mpi_request.WhoInit = MPI2_WHOINIT_HOST_DRIVER;
2596         mpi_request.VF_ID = VF_ID;
2597         mpi_request.MsgVersion = cpu_to_le16(MPI2_VERSION);
2598         mpi_request.HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
2599
2600         /* In MPI Revision I (0xA), the SystemReplyFrameSize(offset 0x18) was
2601          * removed and made reserved.  For those with older firmware will need
2602          * this fix. It was decided that the Reply and Request frame sizes are
2603          * the same.
2604          */
2605         if ((ioc->facts.HeaderVersion >> 8) < 0xA) {
2606                 mpi_request.Reserved7 = cpu_to_le16(ioc->reply_sz);
2607 /*              mpi_request.SystemReplyFrameSize =
2608  *               cpu_to_le16(ioc->reply_sz);
2609  */
2610         }
2611
2612         mpi_request.SystemRequestFrameSize = cpu_to_le16(ioc->request_sz/4);
2613         mpi_request.ReplyDescriptorPostQueueDepth =
2614             cpu_to_le16(ioc->reply_post_queue_depth);
2615         mpi_request.ReplyFreeQueueDepth =
2616             cpu_to_le16(ioc->reply_free_queue_depth);
2617
2618 #if BITS_PER_LONG > 32
2619         mpi_request.SenseBufferAddressHigh =
2620             cpu_to_le32(ioc->sense_dma >> 32);
2621         mpi_request.SystemReplyAddressHigh =
2622             cpu_to_le32(ioc->reply_dma >> 32);
2623         mpi_request.SystemRequestFrameBaseAddress =
2624             cpu_to_le64(ioc->request_dma);
2625         mpi_request.ReplyFreeQueueAddress =
2626             cpu_to_le64(ioc->reply_free_dma);
2627         mpi_request.ReplyDescriptorPostQueueAddress =
2628             cpu_to_le64(ioc->reply_post_free_dma);
2629 #else
2630         mpi_request.SystemRequestFrameBaseAddress =
2631             cpu_to_le32(ioc->request_dma);
2632         mpi_request.ReplyFreeQueueAddress =
2633             cpu_to_le32(ioc->reply_free_dma);
2634         mpi_request.ReplyDescriptorPostQueueAddress =
2635             cpu_to_le32(ioc->reply_post_free_dma);
2636 #endif
2637
2638         if (ioc->logging_level & MPT_DEBUG_INIT) {
2639                 u32 *mfp;
2640                 int i;
2641
2642                 mfp = (u32 *)&mpi_request;
2643                 printk(KERN_DEBUG "\toffset:data\n");
2644                 for (i = 0; i < sizeof(Mpi2IOCInitRequest_t)/4; i++)
2645                         printk(KERN_DEBUG "\t[0x%02x]:%08x\n", i*4,
2646                             le32_to_cpu(mfp[i]));
2647         }
2648
2649         r = _base_handshake_req_reply_wait(ioc,
2650             sizeof(Mpi2IOCInitRequest_t), (u32 *)&mpi_request,
2651             sizeof(Mpi2IOCInitReply_t), (u16 *)&mpi_reply, 10,
2652             sleep_flag);
2653
2654         if (r != 0) {
2655                 printk(MPT2SAS_ERR_FMT "%s: handshake failed (r=%d)\n",
2656                     ioc->name, __func__, r);
2657                 return r;
2658         }
2659
2660         if (mpi_reply.IOCStatus != MPI2_IOCSTATUS_SUCCESS ||
2661             mpi_reply.IOCLogInfo) {
2662                 printk(MPT2SAS_ERR_FMT "%s: failed\n", ioc->name, __func__);
2663                 r = -EIO;
2664         }
2665
2666         return 0;
2667 }
2668
2669 /**
2670  * _base_send_port_enable - send port_enable(discovery stuff) to firmware
2671  * @ioc: per adapter object
2672  * @VF_ID: virtual function id
2673  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2674  *
2675  * Returns 0 for success, non-zero for failure.
2676  */
2677 static int
2678 _base_send_port_enable(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID, int sleep_flag)
2679 {
2680         Mpi2PortEnableRequest_t *mpi_request;
2681         u32 ioc_state;
2682         unsigned long timeleft;
2683         int r = 0;
2684         u16 smid;
2685
2686         printk(MPT2SAS_INFO_FMT "sending port enable !!\n", ioc->name);
2687
2688         if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
2689                 printk(MPT2SAS_ERR_FMT "%s: internal command already in use\n",
2690                     ioc->name, __func__);
2691                 return -EAGAIN;
2692         }
2693
2694         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2695         if (!smid) {
2696                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2697                     ioc->name, __func__);
2698                 return -EAGAIN;
2699         }
2700
2701         ioc->base_cmds.status = MPT2_CMD_PENDING;
2702         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2703         ioc->base_cmds.smid = smid;
2704         memset(mpi_request, 0, sizeof(Mpi2PortEnableRequest_t));
2705         mpi_request->Function = MPI2_FUNCTION_PORT_ENABLE;
2706         mpi_request->VF_ID = VF_ID;
2707
2708         mpt2sas_base_put_smid_default(ioc, smid, VF_ID);
2709         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done,
2710             300*HZ);
2711         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2712                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2713                     ioc->name, __func__);
2714                 _debug_dump_mf(mpi_request,
2715                     sizeof(Mpi2PortEnableRequest_t)/4);
2716                 if (ioc->base_cmds.status & MPT2_CMD_RESET)
2717                         r = -EFAULT;
2718                 else
2719                         r = -ETIME;
2720                 goto out;
2721         } else
2722                 dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: complete\n",
2723                     ioc->name, __func__));
2724
2725         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_OPERATIONAL,
2726             60, sleep_flag);
2727         if (ioc_state) {
2728                 printk(MPT2SAS_ERR_FMT "%s: failed going to operational state "
2729                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
2730                 r = -EFAULT;
2731         }
2732  out:
2733         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2734         printk(MPT2SAS_INFO_FMT "port enable: %s\n",
2735             ioc->name, ((r == 0) ? "SUCCESS" : "FAILED"));
2736         return r;
2737 }
2738
2739 /**
2740  * _base_unmask_events - turn on notification for this event
2741  * @ioc: per adapter object
2742  * @event: firmware event
2743  *
2744  * The mask is stored in ioc->event_masks.
2745  */
2746 static void
2747 _base_unmask_events(struct MPT2SAS_ADAPTER *ioc, u16 event)
2748 {
2749         u32 desired_event;
2750
2751         if (event >= 128)
2752                 return;
2753
2754         desired_event = (1 << (event % 32));
2755
2756         if (event < 32)
2757                 ioc->event_masks[0] &= ~desired_event;
2758         else if (event < 64)
2759                 ioc->event_masks[1] &= ~desired_event;
2760         else if (event < 96)
2761                 ioc->event_masks[2] &= ~desired_event;
2762         else if (event < 128)
2763                 ioc->event_masks[3] &= ~desired_event;
2764 }
2765
2766 /**
2767  * _base_event_notification - send event notification
2768  * @ioc: per adapter object
2769  * @VF_ID: virtual function id
2770  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2771  *
2772  * Returns 0 for success, non-zero for failure.
2773  */
2774 static int
2775 _base_event_notification(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID, int sleep_flag)
2776 {
2777         Mpi2EventNotificationRequest_t *mpi_request;
2778         unsigned long timeleft;
2779         u16 smid;
2780         int r = 0;
2781         int i;
2782
2783         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
2784             __func__));
2785
2786         if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
2787                 printk(MPT2SAS_ERR_FMT "%s: internal command already in use\n",
2788                     ioc->name, __func__);
2789                 return -EAGAIN;
2790         }
2791
2792         smid = mpt2sas_base_get_smid(ioc, ioc->base_cb_idx);
2793         if (!smid) {
2794                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
2795                     ioc->name, __func__);
2796                 return -EAGAIN;
2797         }
2798         ioc->base_cmds.status = MPT2_CMD_PENDING;
2799         mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
2800         ioc->base_cmds.smid = smid;
2801         memset(mpi_request, 0, sizeof(Mpi2EventNotificationRequest_t));
2802         mpi_request->Function = MPI2_FUNCTION_EVENT_NOTIFICATION;
2803         mpi_request->VF_ID = VF_ID;
2804         for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++)
2805                 mpi_request->EventMasks[i] =
2806                     le32_to_cpu(ioc->event_masks[i]);
2807         mpt2sas_base_put_smid_default(ioc, smid, VF_ID);
2808         timeleft = wait_for_completion_timeout(&ioc->base_cmds.done, 30*HZ);
2809         if (!(ioc->base_cmds.status & MPT2_CMD_COMPLETE)) {
2810                 printk(MPT2SAS_ERR_FMT "%s: timeout\n",
2811                     ioc->name, __func__);
2812                 _debug_dump_mf(mpi_request,
2813                     sizeof(Mpi2EventNotificationRequest_t)/4);
2814                 if (ioc->base_cmds.status & MPT2_CMD_RESET)
2815                         r = -EFAULT;
2816                 else
2817                         r = -ETIME;
2818         } else
2819                 dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: complete\n",
2820                     ioc->name, __func__));
2821         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
2822         return r;
2823 }
2824
2825 /**
2826  * mpt2sas_base_validate_event_type - validating event types
2827  * @ioc: per adapter object
2828  * @event: firmware event
2829  *
2830  * This will turn on firmware event notification when application
2831  * ask for that event. We don't mask events that are already enabled.
2832  */
2833 void
2834 mpt2sas_base_validate_event_type(struct MPT2SAS_ADAPTER *ioc, u32 *event_type)
2835 {
2836         int i, j;
2837         u32 event_mask, desired_event;
2838         u8 send_update_to_fw;
2839
2840         for (i = 0, send_update_to_fw = 0; i <
2841             MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++) {
2842                 event_mask = ~event_type[i];
2843                 desired_event = 1;
2844                 for (j = 0; j < 32; j++) {
2845                         if (!(event_mask & desired_event) &&
2846                             (ioc->event_masks[i] & desired_event)) {
2847                                 ioc->event_masks[i] &= ~desired_event;
2848                                 send_update_to_fw = 1;
2849                         }
2850                         desired_event = (desired_event << 1);
2851                 }
2852         }
2853
2854         if (!send_update_to_fw)
2855                 return;
2856
2857         mutex_lock(&ioc->base_cmds.mutex);
2858         _base_event_notification(ioc, 0, CAN_SLEEP);
2859         mutex_unlock(&ioc->base_cmds.mutex);
2860 }
2861
2862 /**
2863  * _base_diag_reset - the "big hammer" start of day reset
2864  * @ioc: per adapter object
2865  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2866  *
2867  * Returns 0 for success, non-zero for failure.
2868  */
2869 static int
2870 _base_diag_reset(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
2871 {
2872         u32 host_diagnostic;
2873         u32 ioc_state;
2874         u32 count;
2875         u32 hcb_size;
2876
2877         printk(MPT2SAS_INFO_FMT "sending diag reset !!\n", ioc->name);
2878
2879         _base_save_msix_table(ioc);
2880
2881         drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "clear interrupts\n",
2882             ioc->name));
2883         writel(0, &ioc->chip->HostInterruptStatus);
2884
2885         count = 0;
2886         do {
2887                 /* Write magic sequence to WriteSequence register
2888                  * Loop until in diagnostic mode
2889                  */
2890                 drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "write magic "
2891                     "sequence\n", ioc->name));
2892                 writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
2893                 writel(MPI2_WRSEQ_1ST_KEY_VALUE, &ioc->chip->WriteSequence);
2894                 writel(MPI2_WRSEQ_2ND_KEY_VALUE, &ioc->chip->WriteSequence);
2895                 writel(MPI2_WRSEQ_3RD_KEY_VALUE, &ioc->chip->WriteSequence);
2896                 writel(MPI2_WRSEQ_4TH_KEY_VALUE, &ioc->chip->WriteSequence);
2897                 writel(MPI2_WRSEQ_5TH_KEY_VALUE, &ioc->chip->WriteSequence);
2898                 writel(MPI2_WRSEQ_6TH_KEY_VALUE, &ioc->chip->WriteSequence);
2899
2900                 /* wait 100 msec */
2901                 if (sleep_flag == CAN_SLEEP)
2902                         msleep(100);
2903                 else
2904                         mdelay(100);
2905
2906                 if (count++ > 20)
2907                         goto out;
2908
2909                 host_diagnostic = readl(&ioc->chip->HostDiagnostic);
2910                 drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "wrote magic "
2911                     "sequence: count(%d), host_diagnostic(0x%08x)\n",
2912                     ioc->name, count, host_diagnostic));
2913
2914         } while ((host_diagnostic & MPI2_DIAG_DIAG_WRITE_ENABLE) == 0);
2915
2916         hcb_size = readl(&ioc->chip->HCBSize);
2917
2918         drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "diag reset: issued\n",
2919             ioc->name));
2920         writel(host_diagnostic | MPI2_DIAG_RESET_ADAPTER,
2921              &ioc->chip->HostDiagnostic);
2922
2923         /* don't access any registers for 50 milliseconds */
2924         msleep(50);
2925
2926         /* 300 second max wait */
2927         for (count = 0; count < 3000000 ; count++) {
2928
2929                 host_diagnostic = readl(&ioc->chip->HostDiagnostic);
2930
2931                 if (host_diagnostic == 0xFFFFFFFF)
2932                         goto out;
2933                 if (!(host_diagnostic & MPI2_DIAG_RESET_ADAPTER))
2934                         break;
2935
2936                 /* wait 100 msec */
2937                 if (sleep_flag == CAN_SLEEP)
2938                         msleep(1);
2939                 else
2940                         mdelay(1);
2941         }
2942
2943         if (host_diagnostic & MPI2_DIAG_HCB_MODE) {
2944
2945                 drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "restart the adapter "
2946                     "assuming the HCB Address points to good F/W\n",
2947                     ioc->name));
2948                 host_diagnostic &= ~MPI2_DIAG_BOOT_DEVICE_SELECT_MASK;
2949                 host_diagnostic |= MPI2_DIAG_BOOT_DEVICE_SELECT_HCDW;
2950                 writel(host_diagnostic, &ioc->chip->HostDiagnostic);
2951
2952                 drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT
2953                     "re-enable the HCDW\n", ioc->name));
2954                 writel(hcb_size | MPI2_HCB_SIZE_HCB_ENABLE,
2955                     &ioc->chip->HCBSize);
2956         }
2957
2958         drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "restart the adapter\n",
2959             ioc->name));
2960         writel(host_diagnostic & ~MPI2_DIAG_HOLD_IOC_RESET,
2961             &ioc->chip->HostDiagnostic);
2962
2963         drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "disable writes to the "
2964             "diagnostic register\n", ioc->name));
2965         writel(MPI2_WRSEQ_FLUSH_KEY_VALUE, &ioc->chip->WriteSequence);
2966
2967         drsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "Wait for FW to go to the "
2968             "READY state\n", ioc->name));
2969         ioc_state = _base_wait_on_iocstate(ioc, MPI2_IOC_STATE_READY, 20,
2970             sleep_flag);
2971         if (ioc_state) {
2972                 printk(MPT2SAS_ERR_FMT "%s: failed going to ready state "
2973                     " (ioc_state=0x%x)\n", ioc->name, __func__, ioc_state);
2974                 goto out;
2975         }
2976
2977         _base_restore_msix_table(ioc);
2978         printk(MPT2SAS_INFO_FMT "diag reset: SUCCESS\n", ioc->name);
2979         return 0;
2980
2981  out:
2982         printk(MPT2SAS_ERR_FMT "diag reset: FAILED\n", ioc->name);
2983         return -EFAULT;
2984 }
2985
2986 /**
2987  * _base_make_ioc_ready - put controller in READY state
2988  * @ioc: per adapter object
2989  * @sleep_flag: CAN_SLEEP or NO_SLEEP
2990  * @type: FORCE_BIG_HAMMER or SOFT_RESET
2991  *
2992  * Returns 0 for success, non-zero for failure.
2993  */
2994 static int
2995 _base_make_ioc_ready(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
2996     enum reset_type type)
2997 {
2998         u32 ioc_state;
2999
3000         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
3001             __func__));
3002
3003         ioc_state = mpt2sas_base_get_iocstate(ioc, 0);
3004         dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: ioc_state(0x%08x)\n",
3005             ioc->name, __func__, ioc_state));
3006
3007         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_READY)
3008                 return 0;
3009
3010         if (ioc_state & MPI2_DOORBELL_USED) {
3011                 dhsprintk(ioc, printk(MPT2SAS_DEBUG_FMT "unexpected doorbell "
3012                     "active!\n", ioc->name));
3013                 goto issue_diag_reset;
3014         }
3015
3016         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_FAULT) {
3017                 mpt2sas_base_fault_info(ioc, ioc_state &
3018                     MPI2_DOORBELL_DATA_MASK);
3019                 goto issue_diag_reset;
3020         }
3021
3022         if (type == FORCE_BIG_HAMMER)
3023                 goto issue_diag_reset;
3024
3025         if ((ioc_state & MPI2_IOC_STATE_MASK) == MPI2_IOC_STATE_OPERATIONAL)
3026                 if (!(_base_send_ioc_reset(ioc,
3027                     MPI2_FUNCTION_IOC_MESSAGE_UNIT_RESET, 15, CAN_SLEEP)))
3028                         return 0;
3029
3030  issue_diag_reset:
3031         return _base_diag_reset(ioc, CAN_SLEEP);
3032 }
3033
3034 /**
3035  * _base_make_ioc_operational - put controller in OPERATIONAL state
3036  * @ioc: per adapter object
3037  * @VF_ID: virtual function id
3038  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3039  *
3040  * Returns 0 for success, non-zero for failure.
3041  */
3042 static int
3043 _base_make_ioc_operational(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
3044     int sleep_flag)
3045 {
3046         int r, i;
3047         unsigned long   flags;
3048         u32 reply_address;
3049
3050         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
3051             __func__));
3052
3053         /* initialize the scsi lookup free list */
3054         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
3055         INIT_LIST_HEAD(&ioc->free_list);
3056         for (i = 0; i < ioc->request_depth; i++) {
3057                 ioc->scsi_lookup[i].cb_idx = 0xFF;
3058                 list_add_tail(&ioc->scsi_lookup[i].tracker_list,
3059                     &ioc->free_list);
3060         }
3061         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
3062
3063         /* initialize Reply Free Queue */
3064         for (i = 0, reply_address = (u32)ioc->reply_dma ;
3065             i < ioc->reply_free_queue_depth ; i++, reply_address +=
3066             ioc->reply_sz)
3067                 ioc->reply_free[i] = cpu_to_le32(reply_address);
3068
3069         /* initialize Reply Post Free Queue */
3070         for (i = 0; i < ioc->reply_post_queue_depth; i++)
3071                 ioc->reply_post_free[i].Words = ~0ULL;
3072
3073         r = _base_send_ioc_init(ioc, VF_ID, sleep_flag);
3074         if (r)
3075                 return r;
3076
3077         /* initialize the index's */
3078         ioc->reply_free_host_index = ioc->reply_free_queue_depth - 1;
3079         ioc->reply_post_host_index = 0;
3080         writel(ioc->reply_free_host_index, &ioc->chip->ReplyFreeHostIndex);
3081         writel(0, &ioc->chip->ReplyPostHostIndex);
3082
3083         _base_unmask_interrupts(ioc);
3084         r = _base_event_notification(ioc, VF_ID, sleep_flag);
3085         if (r)
3086                 return r;
3087
3088         if (sleep_flag == CAN_SLEEP)
3089                 _base_static_config_pages(ioc);
3090
3091         r = _base_send_port_enable(ioc, VF_ID, sleep_flag);
3092         if (r)
3093                 return r;
3094
3095         return r;
3096 }
3097
3098 /**
3099  * mpt2sas_base_free_resources - free resources controller resources (io/irq/memap)
3100  * @ioc: per adapter object
3101  *
3102  * Return nothing.
3103  */
3104 void
3105 mpt2sas_base_free_resources(struct MPT2SAS_ADAPTER *ioc)
3106 {
3107         struct pci_dev *pdev = ioc->pdev;
3108
3109         dexitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
3110             __func__));
3111
3112         _base_mask_interrupts(ioc);
3113         _base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
3114         if (ioc->pci_irq) {
3115                 synchronize_irq(pdev->irq);
3116                 free_irq(ioc->pci_irq, ioc);
3117         }
3118         _base_disable_msix(ioc);
3119         if (ioc->chip_phys)
3120                 iounmap(ioc->chip);
3121         ioc->pci_irq = -1;
3122         ioc->chip_phys = 0;
3123         pci_release_selected_regions(ioc->pdev, ioc->bars);
3124         pci_disable_device(pdev);
3125         pci_set_drvdata(pdev, NULL);
3126         return;
3127 }
3128
3129 /**
3130  * mpt2sas_base_attach - attach controller instance
3131  * @ioc: per adapter object
3132  *
3133  * Returns 0 for success, non-zero for failure.
3134  */
3135 int
3136 mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
3137 {
3138         int r, i;
3139         unsigned long    flags;
3140
3141         dinitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
3142             __func__));
3143
3144         r = mpt2sas_base_map_resources(ioc);
3145         if (r)
3146                 return r;
3147
3148         r = _base_make_ioc_ready(ioc, CAN_SLEEP, SOFT_RESET);
3149         if (r)
3150                 goto out_free_resources;
3151
3152         r = _base_get_ioc_facts(ioc, CAN_SLEEP);
3153         if (r)
3154                 goto out_free_resources;
3155
3156         r = _base_allocate_memory_pools(ioc, CAN_SLEEP);
3157         if (r)
3158                 goto out_free_resources;
3159
3160         init_waitqueue_head(&ioc->reset_wq);
3161
3162         /* base internal command bits */
3163         mutex_init(&ioc->base_cmds.mutex);
3164         init_completion(&ioc->base_cmds.done);
3165         ioc->base_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3166         ioc->base_cmds.status = MPT2_CMD_NOT_USED;
3167
3168         /* transport internal command bits */
3169         ioc->transport_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3170         ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
3171         mutex_init(&ioc->transport_cmds.mutex);
3172         init_completion(&ioc->transport_cmds.done);
3173
3174         /* task management internal command bits */
3175         ioc->tm_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3176         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
3177         mutex_init(&ioc->tm_cmds.mutex);
3178         init_completion(&ioc->tm_cmds.done);
3179
3180         /* config page internal command bits */
3181         ioc->config_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3182         ioc->config_cmds.status = MPT2_CMD_NOT_USED;
3183         mutex_init(&ioc->config_cmds.mutex);
3184         init_completion(&ioc->config_cmds.done);
3185
3186         /* ctl module internal command bits */
3187         ioc->ctl_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
3188         ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
3189         mutex_init(&ioc->ctl_cmds.mutex);
3190         init_completion(&ioc->ctl_cmds.done);
3191
3192         for (i = 0; i < MPI2_EVENT_NOTIFY_EVENTMASK_WORDS; i++)
3193                 ioc->event_masks[i] = -1;
3194
3195         /* here we enable the events we care about */
3196         _base_unmask_events(ioc, MPI2_EVENT_SAS_DISCOVERY);
3197         _base_unmask_events(ioc, MPI2_EVENT_SAS_BROADCAST_PRIMITIVE);
3198         _base_unmask_events(ioc, MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST);
3199         _base_unmask_events(ioc, MPI2_EVENT_SAS_DEVICE_STATUS_CHANGE);
3200         _base_unmask_events(ioc, MPI2_EVENT_SAS_ENCL_DEVICE_STATUS_CHANGE);
3201         _base_unmask_events(ioc, MPI2_EVENT_IR_CONFIGURATION_CHANGE_LIST);
3202         _base_unmask_events(ioc, MPI2_EVENT_IR_VOLUME);
3203         _base_unmask_events(ioc, MPI2_EVENT_IR_PHYSICAL_DISK);
3204         _base_unmask_events(ioc, MPI2_EVENT_IR_OPERATION_STATUS);
3205         _base_unmask_events(ioc, MPI2_EVENT_TASK_SET_FULL);
3206         _base_unmask_events(ioc, MPI2_EVENT_LOG_ENTRY_ADDED);
3207
3208         ioc->pfacts = kcalloc(ioc->facts.NumberOfPorts,
3209             sizeof(Mpi2PortFactsReply_t), GFP_KERNEL);
3210         if (!ioc->pfacts)
3211                 goto out_free_resources;
3212
3213         for (i = 0 ; i < ioc->facts.NumberOfPorts; i++) {
3214                 r = _base_get_port_facts(ioc, i, CAN_SLEEP);
3215                 if (r)
3216                         goto out_free_resources;
3217         }
3218         r = _base_make_ioc_operational(ioc, 0, CAN_SLEEP);
3219         if (r)
3220                 goto out_free_resources;
3221
3222         /* initialize fault polling */
3223         INIT_DELAYED_WORK(&ioc->fault_reset_work, _base_fault_reset_work);
3224         snprintf(ioc->fault_reset_work_q_name,
3225             sizeof(ioc->fault_reset_work_q_name), "poll_%d_status", ioc->id);
3226         ioc->fault_reset_work_q =
3227                 create_singlethread_workqueue(ioc->fault_reset_work_q_name);
3228         if (!ioc->fault_reset_work_q) {
3229                 printk(MPT2SAS_ERR_FMT "%s: failed (line=%d)\n",
3230                     ioc->name, __func__, __LINE__);
3231                         goto out_free_resources;
3232         }
3233         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3234         if (ioc->fault_reset_work_q)
3235                 queue_delayed_work(ioc->fault_reset_work_q,
3236                     &ioc->fault_reset_work,
3237                     msecs_to_jiffies(FAULT_POLLING_INTERVAL));
3238         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3239         return 0;
3240
3241  out_free_resources:
3242
3243         ioc->remove_host = 1;
3244         mpt2sas_base_free_resources(ioc);
3245         _base_release_memory_pools(ioc);
3246         kfree(ioc->tm_cmds.reply);
3247         kfree(ioc->transport_cmds.reply);
3248         kfree(ioc->config_cmds.reply);
3249         kfree(ioc->base_cmds.reply);
3250         kfree(ioc->ctl_cmds.reply);
3251         kfree(ioc->pfacts);
3252         ioc->ctl_cmds.reply = NULL;
3253         ioc->base_cmds.reply = NULL;
3254         ioc->tm_cmds.reply = NULL;
3255         ioc->transport_cmds.reply = NULL;
3256         ioc->config_cmds.reply = NULL;
3257         ioc->pfacts = NULL;
3258         return r;
3259 }
3260
3261
3262 /**
3263  * mpt2sas_base_detach - remove controller instance
3264  * @ioc: per adapter object
3265  *
3266  * Return nothing.
3267  */
3268 void
3269 mpt2sas_base_detach(struct MPT2SAS_ADAPTER *ioc)
3270 {
3271         unsigned long    flags;
3272         struct workqueue_struct *wq;
3273
3274         dexitprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
3275             __func__));
3276
3277         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3278         wq = ioc->fault_reset_work_q;
3279         ioc->fault_reset_work_q = NULL;
3280         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3281         if (!cancel_delayed_work(&ioc->fault_reset_work))
3282                 flush_workqueue(wq);
3283         destroy_workqueue(wq);
3284
3285         mpt2sas_base_free_resources(ioc);
3286         _base_release_memory_pools(ioc);
3287         kfree(ioc->pfacts);
3288         kfree(ioc->ctl_cmds.reply);
3289         kfree(ioc->base_cmds.reply);
3290         kfree(ioc->tm_cmds.reply);
3291         kfree(ioc->transport_cmds.reply);
3292         kfree(ioc->config_cmds.reply);
3293 }
3294
3295 /**
3296  * _base_reset_handler - reset callback handler (for base)
3297  * @ioc: per adapter object
3298  * @reset_phase: phase
3299  *
3300  * The handler for doing any required cleanup or initialization.
3301  *
3302  * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
3303  * MPT2_IOC_DONE_RESET
3304  *
3305  * Return nothing.
3306  */
3307 static void
3308 _base_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
3309 {
3310         switch (reset_phase) {
3311         case MPT2_IOC_PRE_RESET:
3312                 dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
3313                     "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
3314                 break;
3315         case MPT2_IOC_AFTER_RESET:
3316                 dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
3317                     "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
3318                 if (ioc->transport_cmds.status & MPT2_CMD_PENDING) {
3319                         ioc->transport_cmds.status |= MPT2_CMD_RESET;
3320                         mpt2sas_base_free_smid(ioc, ioc->transport_cmds.smid);
3321                         complete(&ioc->transport_cmds.done);
3322                 }
3323                 if (ioc->base_cmds.status & MPT2_CMD_PENDING) {
3324                         ioc->base_cmds.status |= MPT2_CMD_RESET;
3325                         mpt2sas_base_free_smid(ioc, ioc->base_cmds.smid);
3326                         complete(&ioc->base_cmds.done);
3327                 }
3328                 if (ioc->config_cmds.status & MPT2_CMD_PENDING) {
3329                         ioc->config_cmds.status |= MPT2_CMD_RESET;
3330                         mpt2sas_base_free_smid(ioc, ioc->config_cmds.smid);
3331                         complete(&ioc->config_cmds.done);
3332                 }
3333                 break;
3334         case MPT2_IOC_DONE_RESET:
3335                 dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
3336                     "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
3337                 break;
3338         }
3339         mpt2sas_scsih_reset_handler(ioc, reset_phase);
3340         mpt2sas_ctl_reset_handler(ioc, reset_phase);
3341 }
3342
3343 /**
3344  * _wait_for_commands_to_complete - reset controller
3345  * @ioc: Pointer to MPT_ADAPTER structure
3346  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3347  *
3348  * This function waiting(3s) for all pending commands to complete
3349  * prior to putting controller in reset.
3350  */
3351 static void
3352 _wait_for_commands_to_complete(struct MPT2SAS_ADAPTER *ioc, int sleep_flag)
3353 {
3354         u32 ioc_state;
3355         unsigned long flags;
3356         u16 i;
3357
3358         ioc->pending_io_count = 0;
3359         if (sleep_flag != CAN_SLEEP)
3360                 return;
3361
3362         ioc_state = mpt2sas_base_get_iocstate(ioc, 0);
3363         if ((ioc_state & MPI2_IOC_STATE_MASK) != MPI2_IOC_STATE_OPERATIONAL)
3364                 return;
3365
3366         /* pending command count */
3367         spin_lock_irqsave(&ioc->scsi_lookup_lock, flags);
3368         for (i = 0; i < ioc->request_depth; i++)
3369                 if (ioc->scsi_lookup[i].cb_idx != 0xFF)
3370                         ioc->pending_io_count++;
3371         spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags);
3372
3373         if (!ioc->pending_io_count)
3374                 return;
3375
3376         /* wait for pending commands to complete */
3377         wait_event_timeout(ioc->reset_wq, ioc->pending_io_count == 0, 3 * HZ);
3378 }
3379
3380 /**
3381  * mpt2sas_base_hard_reset_handler - reset controller
3382  * @ioc: Pointer to MPT_ADAPTER structure
3383  * @sleep_flag: CAN_SLEEP or NO_SLEEP
3384  * @type: FORCE_BIG_HAMMER or SOFT_RESET
3385  *
3386  * Returns 0 for success, non-zero for failure.
3387  */
3388 int
3389 mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
3390     enum reset_type type)
3391 {
3392         int r, i;
3393         unsigned long flags;
3394
3395         dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: enter\n", ioc->name,
3396             __func__));
3397
3398         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3399         if (ioc->ioc_reset_in_progress) {
3400                 spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3401                 printk(MPT2SAS_ERR_FMT "%s: busy\n",
3402                     ioc->name, __func__);
3403                 return -EBUSY;
3404         }
3405         ioc->ioc_reset_in_progress = 1;
3406         ioc->shost_recovery = 1;
3407         if (ioc->shost->shost_state == SHOST_RUNNING) {
3408                 /* set back to SHOST_RUNNING in mpt2sas_scsih.c */
3409                 scsi_host_set_state(ioc->shost, SHOST_RECOVERY);
3410                 printk(MPT2SAS_INFO_FMT "putting controller into "
3411                     "SHOST_RECOVERY\n", ioc->name);
3412         }
3413         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3414
3415         _base_reset_handler(ioc, MPT2_IOC_PRE_RESET);
3416         _wait_for_commands_to_complete(ioc, sleep_flag);
3417         _base_mask_interrupts(ioc);
3418         r = _base_make_ioc_ready(ioc, sleep_flag, type);
3419         if (r)
3420                 goto out;
3421         _base_reset_handler(ioc, MPT2_IOC_AFTER_RESET);
3422         for (i = 0 ; i < ioc->facts.NumberOfPorts; i++)
3423                 r = _base_make_ioc_operational(ioc, ioc->pfacts[i].VF_ID,
3424                     sleep_flag);
3425         if (!r)
3426                 _base_reset_handler(ioc, MPT2_IOC_DONE_RESET);
3427  out:
3428         dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: %s\n",
3429             ioc->name, __func__, ((r == 0) ? "SUCCESS" : "FAILED")));
3430
3431         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
3432         ioc->ioc_reset_in_progress = 0;
3433         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
3434         return r;
3435 }