drivers/scsi/qla4xxx/ql4_isr.c

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2012 QLogic Corporation
   4  *
   5  * See LICENSE.qla4xxx for copyright and licensing details.
   6  */
   7
   8 #include "ql4_def.h"
   9 #include "ql4_glbl.h"
  10 #include "ql4_dbg.h"
  11 #include "ql4_inline.h"
  12
  13 /**
  14  * qla4xxx_copy_sense - copy sense data into cmd sense buffer
  15  * @ha: Pointer to host adapter structure.
  16  * @sts_entry: Pointer to status entry structure.
  17  * @srb: Pointer to srb structure.
  18  **/
  19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha,
  20                                struct status_entry *sts_entry,
  21                                struct srb *srb)
  22 {
  23         struct scsi_cmnd *cmd = srb->cmd;
  24         uint16_t sense_len;
  25
  26         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
  27         sense_len = le16_to_cpu(sts_entry->senseDataByteCnt);
  28         if (sense_len == 0) {
  29                 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%d: %s:"
  30                                   " sense len 0\n", ha->host_no,
  31                                   cmd->device->channel, cmd->device->id,
  32                                   cmd->device->lun, __func__));
  33                 ha->status_srb = NULL;
  34                 return;
  35         }
  36         /* Save total available sense length,
  37          * not to exceed cmd's sense buffer size */
  38         sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
  39         srb->req_sense_ptr = cmd->sense_buffer;
  40         srb->req_sense_len = sense_len;
  41
  42         /* Copy sense from sts_entry pkt */
  43         sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
  44         memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
  45
  46         DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
  47                 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
  48                 cmd->device->channel, cmd->device->id,
  49                 cmd->device->lun, __func__,
  50                 sts_entry->senseData[2] & 0x0f,
  51                 sts_entry->senseData[7],
  52                 sts_entry->senseData[12],
  53                 sts_entry->senseData[13]));
  54
  55         DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
  56         srb->flags |= SRB_GOT_SENSE;
  57
  58         /* Update srb, in case a sts_cont pkt follows */
  59         srb->req_sense_ptr += sense_len;
  60         srb->req_sense_len -= sense_len;
  61         if (srb->req_sense_len != 0)
  62                 ha->status_srb = srb;
  63         else
  64                 ha->status_srb = NULL;
  65 }
  66
  67 /**
  68  * qla4xxx_status_cont_entry - Process a Status Continuations entry.
  69  * @ha: SCSI driver HA context
  70  * @sts_cont: Entry pointer
  71  *
  72  * Extended sense data.
  73  */
  74 static void
  75 qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
  76                           struct status_cont_entry *sts_cont)
  77 {
  78         struct srb *srb = ha->status_srb;
  79         struct scsi_cmnd *cmd;
  80         uint16_t sense_len;
  81
  82         if (srb == NULL)
  83                 return;
  84
  85         cmd = srb->cmd;
  86         if (cmd == NULL) {
  87                 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
  88                         "back to OS srb=%p srb->state:%d\n", ha->host_no,
  89                         __func__, srb, srb->state));
  90                 ha->status_srb = NULL;
  91                 return;
  92         }
  93
  94         /* Copy sense data. */
  95         sense_len = min_t(uint16_t, srb->req_sense_len,
  96                           IOCB_MAX_EXT_SENSEDATA_LEN);
  97         memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
  98         DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
  99
 100         srb->req_sense_ptr += sense_len;
 101         srb->req_sense_len -= sense_len;
 102
 103         /* Place command on done queue. */
 104         if (srb->req_sense_len == 0) {
 105                 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
 106                 ha->status_srb = NULL;
 107         }
 108 }
 109
 110 /**
 111  * qla4xxx_status_entry - processes status IOCBs
 112  * @ha: Pointer to host adapter structure.
 113  * @sts_entry: Pointer to status entry structure.
 114  **/
 115 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
 116                                  struct status_entry *sts_entry)
 117 {
 118         uint8_t scsi_status;
 119         struct scsi_cmnd *cmd;
 120         struct srb *srb;
 121         struct ddb_entry *ddb_entry;
 122         uint32_t residual;
 123
 124         srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
 125         if (!srb) {
 126                 ql4_printk(KERN_WARNING, ha, "%s invalid status entry: "
 127                            "handle=0x%0x, srb=%p\n", __func__,
 128                            sts_entry->handle, srb);
 129                 if (is_qla80XX(ha))
 130                         set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
 131                 else
 132                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 133                 return;
 134         }
 135
 136         cmd = srb->cmd;
 137         if (cmd == NULL) {
 138                 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
 139                               "OS pkt->handle=%d srb=%p srb->state:%d\n",
 140                               ha->host_no, __func__, sts_entry->handle,
 141                               srb, srb->state));
 142                 ql4_printk(KERN_WARNING, ha, "Command is NULL:"
 143                     " already returned to OS (srb=%p)\n", srb);
 144                 return;
 145         }
 146
 147         ddb_entry = srb->ddb;
 148         if (ddb_entry == NULL) {
 149                 cmd->result = DID_NO_CONNECT << 16;
 150                 goto status_entry_exit;
 151         }
 152
 153         residual = le32_to_cpu(sts_entry->residualByteCnt);
 154
 155         /* Translate ISP error to a Linux SCSI error. */
 156         scsi_status = sts_entry->scsiStatus;
 157         switch (sts_entry->completionStatus) {
 158         case SCS_COMPLETE:
 159
 160                 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
 161                         cmd->result = DID_ERROR << 16;
 162                         break;
 163                 }
 164
 165                 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
 166                         scsi_set_resid(cmd, residual);
 167                         if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
 168                                 cmd->underflow)) {
 169
 170                                 cmd->result = DID_ERROR << 16;
 171
 172                                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
 173                                         "Mid-layer Data underrun0, "
 174                                         "xferlen = 0x%x, "
 175                                         "residual = 0x%x\n", ha->host_no,
 176                                         cmd->device->channel,
 177                                         cmd->device->id,
 178                                         cmd->device->lun, __func__,
 179                                         scsi_bufflen(cmd), residual));
 180                                 break;
 181                         }
 182                 }
 183
 184                 cmd->result = DID_OK << 16 | scsi_status;
 185
 186                 if (scsi_status != SCSI_CHECK_CONDITION)
 187                         break;
 188
 189                 /* Copy Sense Data into sense buffer. */
 190                 qla4xxx_copy_sense(ha, sts_entry, srb);
 191                 break;
 192
 193         case SCS_INCOMPLETE:
 194                 /* Always set the status to DID_ERROR, since
 195                  * all conditions result in that status anyway */
 196                 cmd->result = DID_ERROR << 16;
 197                 break;
 198
 199         case SCS_RESET_OCCURRED:
 200                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
 201                               ha->host_no, cmd->device->channel,
 202                               cmd->device->id, cmd->device->lun, __func__));
 203
 204                 cmd->result = DID_RESET << 16;
 205                 break;
 206
 207         case SCS_ABORTED:
 208                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
 209                               ha->host_no, cmd->device->channel,
 210                               cmd->device->id, cmd->device->lun, __func__));
 211
 212                 cmd->result = DID_RESET << 16;
 213                 break;
 214
 215         case SCS_TIMEOUT:
 216                 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
 217                               ha->host_no, cmd->device->channel,
 218                               cmd->device->id, cmd->device->lun));
 219
 220                 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
 221
 222                 /*
 223                  * Mark device missing so that we won't continue to send
 224                  * I/O to this device.  We should get a ddb state change
 225                  * AEN soon.
 226                  */
 227                 if (iscsi_is_session_online(ddb_entry->sess))
 228                         qla4xxx_mark_device_missing(ddb_entry->sess);
 229                 break;
 230
 231         case SCS_DATA_UNDERRUN:
 232         case SCS_DATA_OVERRUN:
 233                 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
 234                      (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
 235                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
 236                                       ha->host_no,
 237                                       cmd->device->channel, cmd->device->id,
 238                                       cmd->device->lun, __func__));
 239
 240                         cmd->result = DID_ERROR << 16;
 241                         break;
 242                 }
 243
 244                 scsi_set_resid(cmd, residual);
 245
 246                 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) {
 247
 248                         /* Both the firmware and target reported UNDERRUN:
 249                          *
 250                          * MID-LAYER UNDERFLOW case:
 251                          * Some kernels do not properly detect midlayer
 252                          * underflow, so we manually check it and return
 253                          * ERROR if the minimum required data was not
 254                          * received.
 255                          *
 256                          * ALL OTHER cases:
 257                          * Fall thru to check scsi_status
 258                          */
 259                         if (!scsi_status && (scsi_bufflen(cmd) - residual) <
 260                             cmd->underflow) {
 261                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 262                                                   "scsi%ld:%d:%d:%d: %s: Mid-layer Data underrun, xferlen = 0x%x,residual = 0x%x\n",
 263                                                    ha->host_no,
 264                                                    cmd->device->channel,
 265                                                    cmd->device->id,
 266                                                    cmd->device->lun, __func__,
 267                                                    scsi_bufflen(cmd),
 268                                                    residual));
 269
 270                                 cmd->result = DID_ERROR << 16;
 271                                 break;
 272                         }
 273
 274                 } else if (scsi_status != SAM_STAT_TASK_SET_FULL &&
 275                            scsi_status != SAM_STAT_BUSY) {
 276
 277                         /*
 278                          * The firmware reports UNDERRUN, but the target does
 279                          * not report it:
 280                          *
 281                          *   scsi_status     |    host_byte       device_byte
 282                          *                   |     (19:16)          (7:0)
 283                          *   =============   |    =========       ===========
 284                          *   TASK_SET_FULL   |    DID_OK          scsi_status
 285                          *   BUSY            |    DID_OK          scsi_status
 286                          *   ALL OTHERS      |    DID_ERROR       scsi_status
 287                          *
 288                          *   Note: If scsi_status is task set full or busy,
 289                          *   then this else if would fall thru to check the
 290                          *   scsi_status and return DID_OK.
 291                          */
 292
 293                         DEBUG2(ql4_printk(KERN_INFO, ha,
 294                                           "scsi%ld:%d:%d:%d: %s: Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
 295                                           ha->host_no,
 296                                           cmd->device->channel,
 297                                           cmd->device->id,
 298                                           cmd->device->lun, __func__,
 299                                           residual,
 300                                           scsi_bufflen(cmd)));
 301
 302                         cmd->result = DID_ERROR << 16 | scsi_status;
 303                         goto check_scsi_status;
 304                 }
 305
 306                 cmd->result = DID_OK << 16 | scsi_status;
 307
 308 check_scsi_status:
 309                 if (scsi_status == SAM_STAT_CHECK_CONDITION)
 310                         qla4xxx_copy_sense(ha, sts_entry, srb);
 311
 312                 break;
 313
 314         case SCS_DEVICE_LOGGED_OUT:
 315         case SCS_DEVICE_UNAVAILABLE:
 316                 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
 317                     "state: 0x%x\n", ha->host_no,
 318                     cmd->device->channel, cmd->device->id,
 319                     cmd->device->lun, sts_entry->completionStatus));
 320                 /*
 321                  * Mark device missing so that we won't continue to
 322                  * send I/O to this device.  We should get a ddb
 323                  * state change AEN soon.
 324                  */
 325                 if (iscsi_is_session_online(ddb_entry->sess))
 326                         qla4xxx_mark_device_missing(ddb_entry->sess);
 327
 328                 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
 329                 break;
 330
 331         case SCS_QUEUE_FULL:
 332                 /*
 333                  * SCSI Mid-Layer handles device queue full
 334                  */
 335                 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
 336                 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
 337                               "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
 338                               " iResp=%02x\n", ha->host_no, cmd->device->id,
 339                               cmd->device->lun, __func__,
 340                               sts_entry->completionStatus,
 341                               sts_entry->scsiStatus, sts_entry->state_flags,
 342                               sts_entry->iscsiFlags,
 343                               sts_entry->iscsiResponse));
 344                 break;
 345
 346         default:
 347                 cmd->result = DID_ERROR << 16;
 348                 break;
 349         }
 350
 351 status_entry_exit:
 352
 353         /* complete the request, if not waiting for status_continuation pkt */
 354         srb->cc_stat = sts_entry->completionStatus;
 355         if (ha->status_srb == NULL)
 356                 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
 357 }
 358
 359 /**
 360  * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C)
 361  * @ha: Pointer to host adapter structure.
 362  * @sts_entry: Pointer to status entry structure.
 363  **/
 364 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha,
 365                                           struct passthru_status *sts_entry)
 366 {
 367         struct iscsi_task *task;
 368         struct ddb_entry *ddb_entry;
 369         struct ql4_task_data *task_data;
 370         struct iscsi_cls_conn *cls_conn;
 371         struct iscsi_conn *conn;
 372         itt_t itt;
 373         uint32_t fw_ddb_index;
 374
 375         itt = sts_entry->handle;
 376         fw_ddb_index = le32_to_cpu(sts_entry->target);
 377
 378         ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
 379
 380         if (ddb_entry == NULL) {
 381                 ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n",
 382                            __func__, sts_entry->target);
 383                 return;
 384         }
 385
 386         cls_conn = ddb_entry->conn;
 387         conn = cls_conn->dd_data;
 388         spin_lock(&conn->session->lock);
 389         task = iscsi_itt_to_task(conn, itt);
 390         spin_unlock(&conn->session->lock);
 391
 392         if (task == NULL) {
 393                 ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__);
 394                 return;
 395         }
 396
 397         task_data = task->dd_data;
 398         memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status));
 399         ha->iocb_cnt -= task_data->iocb_req_cnt;
 400         queue_work(ha->task_wq, &task_data->task_work);
 401 }
 402
 403 static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha,
 404                                                      uint32_t index)
 405 {
 406         struct mrb *mrb = NULL;
 407
 408         /* validate handle and remove from active array */
 409         if (index >= MAX_MRB)
 410                 return mrb;
 411
 412         mrb = ha->active_mrb_array[index];
 413         ha->active_mrb_array[index] = NULL;
 414         if (!mrb)
 415                 return mrb;
 416
 417         /* update counters */
 418         ha->iocb_cnt -= mrb->iocb_cnt;
 419
 420         return mrb;
 421 }
 422
 423 static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha,
 424                                       struct mbox_status_iocb *mbox_sts_entry)
 425 {
 426         struct mrb *mrb;
 427         uint32_t status;
 428         uint32_t data_size;
 429
 430         mrb = qla4xxx_del_mrb_from_active_array(ha,
 431                                         le32_to_cpu(mbox_sts_entry->handle));
 432
 433         if (mrb == NULL) {
 434                 ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__,
 435                            mbox_sts_entry->handle);
 436                 return;
 437         }
 438
 439         switch (mrb->mbox_cmd) {
 440         case MBOX_CMD_PING:
 441                 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, "
 442                                   "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n",
 443                                   __func__, mrb->mbox_cmd,
 444                                   mbox_sts_entry->out_mbox[0],
 445                                   mbox_sts_entry->out_mbox[6]));
 446
 447                 if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE)
 448                         status = ISCSI_PING_SUCCESS;
 449                 else
 450                         status = mbox_sts_entry->out_mbox[6];
 451
 452                 data_size = sizeof(mbox_sts_entry->out_mbox);
 453
 454                 qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size,
 455                                         (uint8_t *) mbox_sts_entry->out_mbox);
 456                 break;
 457
 458         default:
 459                 DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = "
 460                                   "0x%x\n", __func__, mrb->mbox_cmd));
 461         }
 462
 463         kfree(mrb);
 464         return;
 465 }
 466
 467 /**
 468  * qla4xxx_process_response_queue - process response queue completions
 469  * @ha: Pointer to host adapter structure.
 470  *
 471  * This routine process response queue completions in interrupt context.
 472  * Hardware_lock locked upon entry
 473  **/
 474 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
 475 {
 476         uint32_t count = 0;
 477         struct srb *srb = NULL;
 478         struct status_entry *sts_entry;
 479
 480         /* Process all responses from response queue */
 481         while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
 482                 sts_entry = (struct status_entry *) ha->response_ptr;
 483                 count++;
 484
 485                 /* Advance pointers for next entry */
 486                 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
 487                         ha->response_out = 0;
 488                         ha->response_ptr = ha->response_ring;
 489                 } else {
 490                         ha->response_out++;
 491                         ha->response_ptr++;
 492                 }
 493
 494                 /* process entry */
 495                 switch (sts_entry->hdr.entryType) {
 496                 case ET_STATUS:
 497                         /* Common status */
 498                         qla4xxx_status_entry(ha, sts_entry);
 499                         break;
 500
 501                 case ET_PASSTHRU_STATUS:
 502                         if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
 503                                 qla4xxx_passthru_status_entry(ha,
 504                                         (struct passthru_status *)sts_entry);
 505                         else
 506                                 ql4_printk(KERN_ERR, ha,
 507                                            "%s: Invalid status received\n",
 508                                            __func__);
 509
 510                         break;
 511
 512                 case ET_STATUS_CONTINUATION:
 513                         qla4xxx_status_cont_entry(ha,
 514                                 (struct status_cont_entry *) sts_entry);
 515                         break;
 516
 517                 case ET_COMMAND:
 518                         /* ISP device queue is full. Command not
 519                          * accepted by ISP.  Queue command for
 520                          * later */
 521
 522                         srb = qla4xxx_del_from_active_array(ha,
 523                                                     le32_to_cpu(sts_entry->
 524                                                                 handle));
 525                         if (srb == NULL)
 526                                 goto exit_prq_invalid_handle;
 527
 528                         DEBUG2(printk("scsi%ld: %s: FW device queue full, "
 529                                       "srb %p\n", ha->host_no, __func__, srb));
 530
 531                         /* ETRY normally by sending it back with
 532                          * DID_BUS_BUSY */
 533                         srb->cmd->result = DID_BUS_BUSY << 16;
 534                         kref_put(&srb->srb_ref, qla4xxx_srb_compl);
 535                         break;
 536
 537                 case ET_CONTINUE:
 538                         /* Just throw away the continuation entries */
 539                         DEBUG2(printk("scsi%ld: %s: Continuation entry - "
 540                                       "ignoring\n", ha->host_no, __func__));
 541                         break;
 542
 543                 case ET_MBOX_STATUS:
 544                         DEBUG2(ql4_printk(KERN_INFO, ha,
 545                                           "%s: mbox status IOCB\n", __func__));
 546                         qla4xxx_mbox_status_entry(ha,
 547                                         (struct mbox_status_iocb *)sts_entry);
 548                         break;
 549
 550                 default:
 551                         /*
 552                          * Invalid entry in response queue, reset RISC
 553                          * firmware.
 554                          */
 555                         DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
 556                                       "response queue \n", ha->host_no,
 557                                       __func__,
 558                                       sts_entry->hdr.entryType));
 559                         goto exit_prq_error;
 560                 }
 561                 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
 562                 wmb();
 563         }
 564
 565         /*
 566          * Tell ISP we're done with response(s). This also clears the interrupt.
 567          */
 568         ha->isp_ops->complete_iocb(ha);
 569
 570         return;
 571
 572 exit_prq_invalid_handle:
 573         DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
 574                       ha->host_no, __func__, srb, sts_entry->hdr.entryType,
 575                       sts_entry->completionStatus));
 576
 577 exit_prq_error:
 578         ha->isp_ops->complete_iocb(ha);
 579         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 580 }
 581
 582 /**
 583  * qla4_83xx_loopback_in_progress: Is loopback in progress?
 584  * @ha: Pointer to host adapter structure.
 585  * @ret: 1 = loopback in progress, 0 = loopback not in progress
 586  **/
 587 static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha)
 588 {
 589         int rval = 1;
 590
 591         if (is_qla8032(ha)) {
 592                 if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) ||
 593                     (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) {
 594                         DEBUG2(ql4_printk(KERN_INFO, ha,
 595                                           "%s: Loopback diagnostics in progress\n",
 596                                           __func__));
 597                         rval = 1;
 598                 } else {
 599                         DEBUG2(ql4_printk(KERN_INFO, ha,
 600                                           "%s: Loopback diagnostics not in progress\n",
 601                                           __func__));
 602                         rval = 0;
 603                 }
 604         }
 605
 606         return rval;
 607 }
 608
 609 /**
 610  * qla4xxx_isr_decode_mailbox - decodes mailbox status
 611  * @ha: Pointer to host adapter structure.
 612  * @mailbox_status: Mailbox status.
 613  *
 614  * This routine decodes the mailbox status during the ISR.
 615  * Hardware_lock locked upon entry. runs in interrupt context.
 616  **/
 617 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 618                                        uint32_t mbox_status)
 619 {
 620         int i;
 621         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 622         __le32 __iomem *mailbox_out;
 623
 624         if (is_qla8032(ha))
 625                 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
 626         else if (is_qla8022(ha))
 627                 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
 628         else
 629                 mailbox_out = &ha->reg->mailbox[0];
 630
 631         if ((mbox_status == MBOX_STS_BUSY) ||
 632             (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 633             (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 634                 ha->mbox_status[0] = mbox_status;
 635
 636                 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 637                         /*
 638                          * Copy all mailbox registers to a temporary
 639                          * location and set mailbox command done flag
 640                          */
 641                         for (i = 0; i < ha->mbox_status_count; i++)
 642                                 ha->mbox_status[i] = readl(&mailbox_out[i]);
 643
 644                         set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 645
 646                         if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
 647                                 complete(&ha->mbx_intr_comp);
 648                 }
 649         } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 650                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 651                         mbox_sts[i] = readl(&mailbox_out[i]);
 652
 653                 /* Immediately process the AENs that don't require much work.
 654                  * Only queue the database_changed AENs */
 655                 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 656                         for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 657                                 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 658                                     mbox_sts[i];
 659                         ha->aen_log.count++;
 660                 }
 661                 switch (mbox_status) {
 662                 case MBOX_ASTS_SYSTEM_ERROR:
 663                         /* Log Mailbox registers */
 664                         ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
 665                         qla4xxx_dump_registers(ha);
 666
 667                         if ((is_qla8022(ha) && ql4xdontresethba) ||
 668                             (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) {
 669                                 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
 670                                     ha->host_no, __func__));
 671                         } else {
 672                                 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 673                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 674                         }
 675                         break;
 676
 677                 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 678                 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 679                 case MBOX_ASTS_NVRAM_INVALID:
 680                 case MBOX_ASTS_IP_ADDRESS_CHANGED:
 681                 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 682                         DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 683                                       "Reset HA\n", ha->host_no, mbox_status));
 684                         if (is_qla80XX(ha))
 685                                 set_bit(DPC_RESET_HA_FW_CONTEXT,
 686                                         &ha->dpc_flags);
 687                         else
 688                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 689                         break;
 690
 691                 case MBOX_ASTS_LINK_UP:
 692                         set_bit(AF_LINK_UP, &ha->flags);
 693                         if (test_bit(AF_INIT_DONE, &ha->flags))
 694                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 695
 696                         ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
 697                         qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
 698                                               sizeof(mbox_sts),
 699                                               (uint8_t *) mbox_sts);
 700                         break;
 701
 702                 case MBOX_ASTS_LINK_DOWN:
 703                         clear_bit(AF_LINK_UP, &ha->flags);
 704                         if (test_bit(AF_INIT_DONE, &ha->flags)) {
 705                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 706                                 qla4xxx_wake_dpc(ha);
 707                         }
 708
 709                         ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
 710                         qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
 711                                               sizeof(mbox_sts),
 712                                               (uint8_t *) mbox_sts);
 713                         break;
 714
 715                 case MBOX_ASTS_HEARTBEAT:
 716                         ha->seconds_since_last_heartbeat = 0;
 717                         break;
 718
 719                 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 720                         DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 721                                       "ACQUIRED\n", ha->host_no, mbox_status));
 722                         set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 723                         break;
 724
 725                 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 726                 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 727                                                            * mode
 728                                                            * only */
 729                 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 730                 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 731                 case MBOX_ASTS_SUBNET_STATE_CHANGE:
 732                 case MBOX_ASTS_DUPLICATE_IP:
 733                         /* No action */
 734                         DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 735                                       mbox_status));
 736                         break;
 737
 738                 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 739                         printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
 740                             "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
 741                             mbox_sts[2], mbox_sts[3]);
 742
 743                         /* mbox_sts[2] = Old ACB state
 744                          * mbox_sts[3] = new ACB state */
 745                         if ((mbox_sts[3] == ACB_STATE_VALID) &&
 746                             ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
 747                             (mbox_sts[2] == ACB_STATE_ACQUIRING)))
 748                                 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 749                         else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
 750                                  (mbox_sts[2] == ACB_STATE_VALID)) {
 751                                 if (is_qla80XX(ha))
 752                                         set_bit(DPC_RESET_HA_FW_CONTEXT,
 753                                                 &ha->dpc_flags);
 754                                 else
 755                                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 756                         } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
 757                                 complete(&ha->disable_acb_comp);
 758                         break;
 759
 760                 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 761                 case MBOX_ASTS_DNS:
 762                         /* No action */
 763                         DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 764                                       "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 765                                       ha->host_no, mbox_sts[0],
 766                                       mbox_sts[1], mbox_sts[2]));
 767                         break;
 768
 769                 case MBOX_ASTS_SELF_TEST_FAILED:
 770                 case MBOX_ASTS_LOGIN_FAILED:
 771                         /* No action */
 772                         DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 773                                       "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 774                                       ha->host_no, mbox_sts[0], mbox_sts[1],
 775                                       mbox_sts[2], mbox_sts[3]));
 776                         break;
 777
 778                 case MBOX_ASTS_DATABASE_CHANGED:
 779                         /* Queue AEN information and process it in the DPC
 780                          * routine */
 781                         if (ha->aen_q_count > 0) {
 782
 783                                 /* decrement available counter */
 784                                 ha->aen_q_count--;
 785
 786                                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 787                                         ha->aen_q[ha->aen_in].mbox_sts[i] =
 788                                             mbox_sts[i];
 789
 790                                 /* print debug message */
 791                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
 792                                               "mb1:0x%x mb2:0x%x mb3:0x%x "
 793                                               "mb4:0x%x mb5:0x%x\n",
 794                                               ha->host_no, ha->aen_in,
 795                                               mbox_sts[0], mbox_sts[1],
 796                                               mbox_sts[2], mbox_sts[3],
 797                                               mbox_sts[4], mbox_sts[5]));
 798
 799                                 /* advance pointer */
 800                                 ha->aen_in++;
 801                                 if (ha->aen_in == MAX_AEN_ENTRIES)
 802                                         ha->aen_in = 0;
 803
 804                                 /* The DPC routine will process the aen */
 805                                 set_bit(DPC_AEN, &ha->dpc_flags);
 806                         } else {
 807                                 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 808                                               "overflowed!  AEN LOST!!\n",
 809                                               ha->host_no, __func__,
 810                                               mbox_sts[0]));
 811
 812                                 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 813                                               ha->host_no));
 814
 815                                 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 816                                         DEBUG2(printk("AEN[%d] %04x %04x %04x "
 817                                                       "%04x\n", i, mbox_sts[0],
 818                                                       mbox_sts[1], mbox_sts[2],
 819                                                       mbox_sts[3]));
 820                                 }
 821                         }
 822                         break;
 823
 824                 case MBOX_ASTS_TXSCVR_INSERTED:
 825                         DEBUG2(printk(KERN_WARNING
 826                             "scsi%ld: AEN %04x Transceiver"
 827                             " inserted\n",  ha->host_no, mbox_sts[0]));
 828                         break;
 829
 830                 case MBOX_ASTS_TXSCVR_REMOVED:
 831                         DEBUG2(printk(KERN_WARNING
 832                             "scsi%ld: AEN %04x Transceiver"
 833                             " removed\n",  ha->host_no, mbox_sts[0]));
 834                         break;
 835
 836                 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
 837                 {
 838                         uint32_t opcode;
 839                         if (is_qla8032(ha)) {
 840                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 841                                                   "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 842                                                   ha->host_no, mbox_sts[0],
 843                                                   mbox_sts[1], mbox_sts[2],
 844                                                   mbox_sts[3], mbox_sts[4]));
 845                                 opcode = mbox_sts[1] >> 16;
 846                                 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
 847                                     (opcode == MBOX_CMD_PORT_RESET)) {
 848                                         set_bit(DPC_POST_IDC_ACK,
 849                                                 &ha->dpc_flags);
 850                                         ha->idc_info.request_desc = mbox_sts[1];
 851                                         ha->idc_info.info1 = mbox_sts[2];
 852                                         ha->idc_info.info2 = mbox_sts[3];
 853                                         ha->idc_info.info3 = mbox_sts[4];
 854                                         qla4xxx_wake_dpc(ha);
 855                                 }
 856                         }
 857                         break;
 858                 }
 859
 860                 case MBOX_ASTS_IDC_COMPLETE:
 861                         if (is_qla8032(ha)) {
 862                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 863                                                   "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 864                                                   ha->host_no, mbox_sts[0],
 865                                                   mbox_sts[1], mbox_sts[2],
 866                                                   mbox_sts[3], mbox_sts[4]));
 867                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 868                                                   "scsi:%ld: AEN %04x IDC Complete notification\n",
 869                                                   ha->host_no, mbox_sts[0]));
 870
 871                                 if (qla4_83xx_loopback_in_progress(ha))
 872                                         set_bit(AF_LOOPBACK, &ha->flags);
 873                                 else
 874                                         clear_bit(AF_LOOPBACK, &ha->flags);
 875                         }
 876                         break;
 877
 878                 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
 879                         DEBUG2(ql4_printk(KERN_INFO, ha,
 880                                           "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
 881                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 882                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 883                                           mbox_sts[5]));
 884                         DEBUG2(ql4_printk(KERN_INFO, ha,
 885                                           "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
 886                                           ha->host_no, mbox_sts[0]));
 887                         break;
 888
 889                 case MBOX_ASTS_INITIALIZATION_FAILED:
 890                         DEBUG2(ql4_printk(KERN_INFO, ha,
 891                                           "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
 892                                           ha->host_no, mbox_sts[0],
 893                                           mbox_sts[3]));
 894                         break;
 895
 896                 case MBOX_ASTS_SYSTEM_WARNING_EVENT:
 897                         DEBUG2(ql4_printk(KERN_WARNING, ha,
 898                                           "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
 899                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 900                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 901                                           mbox_sts[5]));
 902                         break;
 903
 904                 case MBOX_ASTS_DCBX_CONF_CHANGE:
 905                         DEBUG2(ql4_printk(KERN_INFO, ha,
 906                                           "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
 907                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 908                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 909                                           mbox_sts[5]));
 910                         DEBUG2(ql4_printk(KERN_INFO, ha,
 911                                           "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
 912                                           ha->host_no, mbox_sts[0]));
 913                         break;
 914
 915                 default:
 916                         DEBUG2(printk(KERN_WARNING
 917                                       "scsi%ld: AEN %04x UNKNOWN\n",
 918                                       ha->host_no, mbox_sts[0]));
 919                         break;
 920                 }
 921         } else {
 922                 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
 923                               ha->host_no, mbox_status));
 924
 925                 ha->mbox_status[0] = mbox_status;
 926         }
 927 }
 928
 929 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
 930                                          uint32_t intr_status)
 931 {
 932         /* Process mailbox/asynch event interrupt.*/
 933         if (intr_status) {
 934                 qla4xxx_isr_decode_mailbox(ha,
 935                                 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
 936                 /* clear the interrupt */
 937                 writel(0, &ha->qla4_83xx_reg->risc_intr);
 938         } else {
 939                 qla4xxx_process_response_queue(ha);
 940         }
 941
 942         /* clear the interrupt */
 943         writel(0, &ha->qla4_83xx_reg->mb_int_mask);
 944 }
 945
 946 /**
 947  * qla4_82xx_interrupt_service_routine - isr
 948  * @ha: pointer to host adapter structure.
 949  *
 950  * This is the main interrupt service routine.
 951  * hardware_lock locked upon entry. runs in interrupt context.
 952  **/
 953 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
 954     uint32_t intr_status)
 955 {
 956         /* Process response queue interrupt. */
 957         if (intr_status & HSRX_RISC_IOCB_INT)
 958                 qla4xxx_process_response_queue(ha);
 959
 960         /* Process mailbox/asynch event interrupt.*/
 961         if (intr_status & HSRX_RISC_MB_INT)
 962                 qla4xxx_isr_decode_mailbox(ha,
 963                     readl(&ha->qla4_82xx_reg->mailbox_out[0]));
 964
 965         /* clear the interrupt */
 966         writel(0, &ha->qla4_82xx_reg->host_int);
 967         readl(&ha->qla4_82xx_reg->host_int);
 968 }
 969
 970 /**
 971  * qla4xxx_interrupt_service_routine - isr
 972  * @ha: pointer to host adapter structure.
 973  *
 974  * This is the main interrupt service routine.
 975  * hardware_lock locked upon entry. runs in interrupt context.
 976  **/
 977 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
 978                                        uint32_t intr_status)
 979 {
 980         /* Process response queue interrupt. */
 981         if (intr_status & CSR_SCSI_COMPLETION_INTR)
 982                 qla4xxx_process_response_queue(ha);
 983
 984         /* Process mailbox/asynch event  interrupt.*/
 985         if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
 986                 qla4xxx_isr_decode_mailbox(ha,
 987                                            readl(&ha->reg->mailbox[0]));
 988
 989                 /* Clear Mailbox Interrupt */
 990                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
 991                        &ha->reg->ctrl_status);
 992                 readl(&ha->reg->ctrl_status);
 993         }
 994 }
 995
 996 /**
 997  * qla4_82xx_spurious_interrupt - processes spurious interrupt
 998  * @ha: pointer to host adapter structure.
 999  * @reqs_count: .
1000  *
1001  **/
1002 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
1003     uint8_t reqs_count)
1004 {
1005         if (reqs_count)
1006                 return;
1007
1008         DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
1009         if (is_qla8022(ha)) {
1010                 writel(0, &ha->qla4_82xx_reg->host_int);
1011                 if (test_bit(AF_INTx_ENABLED, &ha->flags))
1012                         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
1013                             0xfbff);
1014         }
1015         ha->spurious_int_count++;
1016 }
1017
1018 /**
1019  * qla4xxx_intr_handler - hardware interrupt handler.
1020  * @irq: Unused
1021  * @dev_id: Pointer to host adapter structure
1022  **/
1023 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
1024 {
1025         struct scsi_qla_host *ha;
1026         uint32_t intr_status;
1027         unsigned long flags = 0;
1028         uint8_t reqs_count = 0;
1029
1030         ha = (struct scsi_qla_host *) dev_id;
1031         if (!ha) {
1032                 DEBUG2(printk(KERN_INFO
1033                               "qla4xxx: Interrupt with NULL host ptr\n"));
1034                 return IRQ_NONE;
1035         }
1036
1037         spin_lock_irqsave(&ha->hardware_lock, flags);
1038
1039         ha->isr_count++;
1040         /*
1041          * Repeatedly service interrupts up to a maximum of
1042          * MAX_REQS_SERVICED_PER_INTR
1043          */
1044         while (1) {
1045                 /*
1046                  * Read interrupt status
1047                  */
1048                 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1049                     ha->response_out)
1050                         intr_status = CSR_SCSI_COMPLETION_INTR;
1051                 else
1052                         intr_status = readl(&ha->reg->ctrl_status);
1053
1054                 if ((intr_status &
1055                     (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1056                         if (reqs_count == 0)
1057                                 ha->spurious_int_count++;
1058                         break;
1059                 }
1060
1061                 if (intr_status & CSR_FATAL_ERROR) {
1062                         DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1063                                       "Status 0x%04x\n", ha->host_no,
1064                                       readl(isp_port_error_status (ha))));
1065
1066                         /* Issue Soft Reset to clear this error condition.
1067                          * This will prevent the RISC from repeatedly
1068                          * interrupting the driver; thus, allowing the DPC to
1069                          * get scheduled to continue error recovery.
1070                          * NOTE: Disabling RISC interrupts does not work in
1071                          * this case, as CSR_FATAL_ERROR overrides
1072                          * CSR_SCSI_INTR_ENABLE */
1073                         if ((readl(&ha->reg->ctrl_status) &
1074                              CSR_SCSI_RESET_INTR) == 0) {
1075                                 writel(set_rmask(CSR_SOFT_RESET),
1076                                        &ha->reg->ctrl_status);
1077                                 readl(&ha->reg->ctrl_status);
1078                         }
1079
1080                         writel(set_rmask(CSR_FATAL_ERROR),
1081                                &ha->reg->ctrl_status);
1082                         readl(&ha->reg->ctrl_status);
1083
1084                         __qla4xxx_disable_intrs(ha);
1085
1086                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
1087
1088                         break;
1089                 } else if (intr_status & CSR_SCSI_RESET_INTR) {
1090                         clear_bit(AF_ONLINE, &ha->flags);
1091                         __qla4xxx_disable_intrs(ha);
1092
1093                         writel(set_rmask(CSR_SCSI_RESET_INTR),
1094                                &ha->reg->ctrl_status);
1095                         readl(&ha->reg->ctrl_status);
1096
1097                         if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1098                                 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1099
1100                         break;
1101                 } else if (intr_status & INTR_PENDING) {
1102                         ha->isp_ops->interrupt_service_routine(ha, intr_status);
1103                         ha->total_io_count++;
1104                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1105                                 break;
1106                 }
1107         }
1108
1109         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1110
1111         return IRQ_HANDLED;
1112 }
1113
1114 /**
1115  * qla4_82xx_intr_handler - hardware interrupt handler.
1116  * @irq: Unused
1117  * @dev_id: Pointer to host adapter structure
1118  **/
1119 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1120 {
1121         struct scsi_qla_host *ha = dev_id;
1122         uint32_t intr_status;
1123         uint32_t status;
1124         unsigned long flags = 0;
1125         uint8_t reqs_count = 0;
1126
1127         if (unlikely(pci_channel_offline(ha->pdev)))
1128                 return IRQ_HANDLED;
1129
1130         ha->isr_count++;
1131         status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1132         if (!(status & ha->nx_legacy_intr.int_vec_bit))
1133                 return IRQ_NONE;
1134
1135         status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1136         if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1137                 DEBUG7(ql4_printk(KERN_INFO, ha,
1138                                   "%s legacy Int not triggered\n", __func__));
1139                 return IRQ_NONE;
1140         }
1141
1142         /* clear the interrupt */
1143         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1144
1145         /* read twice to ensure write is flushed */
1146         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1147         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1148
1149         spin_lock_irqsave(&ha->hardware_lock, flags);
1150         while (1) {
1151                 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1152                     ISRX_82XX_RISC_INT)) {
1153                         qla4_82xx_spurious_interrupt(ha, reqs_count);
1154                         break;
1155                 }
1156                 intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1157                 if ((intr_status &
1158                     (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0)  {
1159                         qla4_82xx_spurious_interrupt(ha, reqs_count);
1160                         break;
1161                 }
1162
1163                 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1164
1165                 /* Enable Interrupt */
1166                 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1167
1168                 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1169                         break;
1170         }
1171
1172         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1173         return IRQ_HANDLED;
1174 }
1175
1176 #define LEG_INT_PTR_B31         (1 << 31)
1177 #define LEG_INT_PTR_B30         (1 << 30)
1178 #define PF_BITS_MASK            (0xF << 16)
1179
1180 /**
1181  * qla4_83xx_intr_handler - hardware interrupt handler.
1182  * @irq: Unused
1183  * @dev_id: Pointer to host adapter structure
1184  **/
1185 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1186 {
1187         struct scsi_qla_host *ha = dev_id;
1188         uint32_t leg_int_ptr = 0;
1189         unsigned long flags = 0;
1190
1191         ha->isr_count++;
1192         leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1193
1194         /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1195         if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1196                 DEBUG7(ql4_printk(KERN_ERR, ha,
1197                                   "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1198                                   __func__));
1199                 return IRQ_NONE;
1200         }
1201
1202         /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1203         if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1204                 DEBUG7(ql4_printk(KERN_ERR, ha,
1205                                   "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1206                                   __func__, (leg_int_ptr & PF_BITS_MASK),
1207                                   ha->pf_bit));
1208                 return IRQ_NONE;
1209         }
1210
1211         /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1212          * Control register and poll till Legacy Interrupt Pointer register
1213          * bit30 is 0.
1214          */
1215         writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1216         do {
1217                 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1218                 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1219                         break;
1220         } while (leg_int_ptr & LEG_INT_PTR_B30);
1221
1222         spin_lock_irqsave(&ha->hardware_lock, flags);
1223         leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1224         ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1225         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1226
1227         return IRQ_HANDLED;
1228 }
1229
1230 irqreturn_t
1231 qla4_8xxx_msi_handler(int irq, void *dev_id)
1232 {
1233         struct scsi_qla_host *ha;
1234
1235         ha = (struct scsi_qla_host *) dev_id;
1236         if (!ha) {
1237                 DEBUG2(printk(KERN_INFO
1238                     "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1239                 return IRQ_NONE;
1240         }
1241
1242         ha->isr_count++;
1243         /* clear the interrupt */
1244         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1245
1246         /* read twice to ensure write is flushed */
1247         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1248         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1249
1250         return qla4_8xxx_default_intr_handler(irq, dev_id);
1251 }
1252
1253 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1254 {
1255         struct scsi_qla_host *ha = dev_id;
1256         unsigned long flags;
1257         uint32_t ival = 0;
1258
1259         spin_lock_irqsave(&ha->hardware_lock, flags);
1260
1261         ival = readl(&ha->qla4_83xx_reg->risc_intr);
1262         if (ival == 0) {
1263                 ql4_printk(KERN_INFO, ha,
1264                            "%s: It is a spurious mailbox interrupt!\n",
1265                            __func__);
1266                 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1267                 ival &= ~INT_MASK_FW_MB;
1268                 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1269                 goto exit;
1270         }
1271
1272         qla4xxx_isr_decode_mailbox(ha,
1273                                    readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1274         writel(0, &ha->qla4_83xx_reg->risc_intr);
1275         ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1276         ival &= ~INT_MASK_FW_MB;
1277         writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1278         ha->isr_count++;
1279 exit:
1280         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1281         return IRQ_HANDLED;
1282 }
1283
1284 /**
1285  * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1286  * @irq: Unused
1287  * @dev_id: Pointer to host adapter structure
1288  *
1289  * This interrupt handler is called directly for MSI-X, and
1290  * called indirectly for MSI.
1291  **/
1292 irqreturn_t
1293 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1294 {
1295         struct scsi_qla_host *ha = dev_id;
1296         unsigned long   flags;
1297         uint32_t intr_status;
1298         uint8_t reqs_count = 0;
1299
1300         if (is_qla8032(ha)) {
1301                 qla4_83xx_mailbox_intr_handler(irq, dev_id);
1302         } else {
1303                 spin_lock_irqsave(&ha->hardware_lock, flags);
1304                 while (1) {
1305                         if (!(readl(&ha->qla4_82xx_reg->host_int) &
1306                             ISRX_82XX_RISC_INT)) {
1307                                 qla4_82xx_spurious_interrupt(ha, reqs_count);
1308                                 break;
1309                         }
1310
1311                         intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1312                         if ((intr_status &
1313                             (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1314                                 qla4_82xx_spurious_interrupt(ha, reqs_count);
1315                                 break;
1316                         }
1317
1318                         ha->isp_ops->interrupt_service_routine(ha, intr_status);
1319
1320                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1321                                 break;
1322                 }
1323                 ha->isr_count++;
1324                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1325         }
1326         return IRQ_HANDLED;
1327 }
1328
1329 irqreturn_t
1330 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1331 {
1332         struct scsi_qla_host *ha = dev_id;
1333         unsigned long flags;
1334         uint32_t ival = 0;
1335
1336         spin_lock_irqsave(&ha->hardware_lock, flags);
1337         if (is_qla8032(ha)) {
1338                 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1339                 if (ival == 0) {
1340                         ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1341                                    __func__);
1342                         goto exit_msix_rsp_q;
1343                 }
1344                 qla4xxx_process_response_queue(ha);
1345                 writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1346         } else {
1347                 qla4xxx_process_response_queue(ha);
1348                 writel(0, &ha->qla4_82xx_reg->host_int);
1349         }
1350         ha->isr_count++;
1351 exit_msix_rsp_q:
1352         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1353         return IRQ_HANDLED;
1354 }
1355
1356 /**
1357  * qla4xxx_process_aen - processes AENs generated by firmware
1358  * @ha: pointer to host adapter structure.
1359  * @process_aen: type of AENs to process
1360  *
1361  * Processes specific types of Asynchronous Events generated by firmware.
1362  * The type of AENs to process is specified by process_aen and can be
1363  *      PROCESS_ALL_AENS         0
1364  *      FLUSH_DDB_CHANGED_AENS   1
1365  *      RELOGIN_DDB_CHANGED_AENS 2
1366  **/
1367 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1368 {
1369         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1370         struct aen *aen;
1371         int i;
1372         unsigned long flags;
1373
1374         spin_lock_irqsave(&ha->hardware_lock, flags);
1375         while (ha->aen_out != ha->aen_in) {
1376                 aen = &ha->aen_q[ha->aen_out];
1377                 /* copy aen information to local structure */
1378                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1379                         mbox_sts[i] = aen->mbox_sts[i];
1380
1381                 ha->aen_q_count++;
1382                 ha->aen_out++;
1383
1384                 if (ha->aen_out == MAX_AEN_ENTRIES)
1385                         ha->aen_out = 0;
1386
1387                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1388
1389                 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1390                         " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1391                         (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1392                         mbox_sts[0], mbox_sts[1], mbox_sts[2],
1393                         mbox_sts[3], mbox_sts[4]));
1394
1395                 switch (mbox_sts[0]) {
1396                 case MBOX_ASTS_DATABASE_CHANGED:
1397                         switch (process_aen) {
1398                         case FLUSH_DDB_CHANGED_AENS:
1399                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1400                                               "[%d] state=%04x FLUSHED!\n",
1401                                               ha->host_no, ha->aen_out,
1402                                               mbox_sts[0], mbox_sts[2],
1403                                               mbox_sts[3]));
1404                                 break;
1405                         case PROCESS_ALL_AENS:
1406                         default:
1407                                 /* Specific device. */
1408                                 if (mbox_sts[1] == 1)
1409                                         qla4xxx_process_ddb_changed(ha,
1410                                                 mbox_sts[2], mbox_sts[3],
1411                                                 mbox_sts[4]);
1412                                 break;
1413                         }
1414                 }
1415                 spin_lock_irqsave(&ha->hardware_lock, flags);
1416         }
1417         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1418 }
1419
1420 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1421 {
1422         int ret;
1423
1424         if (is_qla40XX(ha))
1425                 goto try_intx;
1426
1427         if (ql4xenablemsix == 2) {
1428                 /* Note: MSI Interrupts not supported for ISP8324 */
1429                 if (is_qla8032(ha)) {
1430                         ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n",
1431                                    __func__);
1432                         goto try_intx;
1433                 }
1434                 goto try_msi;
1435         }
1436
1437         if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1438                 goto try_intx;
1439
1440         /* Trying MSI-X */
1441         ret = qla4_8xxx_enable_msix(ha);
1442         if (!ret) {
1443                 DEBUG2(ql4_printk(KERN_INFO, ha,
1444                     "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1445                 goto irq_attached;
1446         } else {
1447                 if (is_qla8032(ha)) {
1448                         ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n",
1449                                    __func__, ret);
1450                         goto try_intx;
1451                 }
1452         }
1453
1454         ql4_printk(KERN_WARNING, ha,
1455             "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1456
1457 try_msi:
1458         /* Trying MSI */
1459         ret = pci_enable_msi(ha->pdev);
1460         if (!ret) {
1461                 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1462                         0, DRIVER_NAME, ha);
1463                 if (!ret) {
1464                         DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1465                         set_bit(AF_MSI_ENABLED, &ha->flags);
1466                         goto irq_attached;
1467                 } else {
1468                         ql4_printk(KERN_WARNING, ha,
1469                             "MSI: Failed to reserve interrupt %d "
1470                             "already in use.\n", ha->pdev->irq);
1471                         pci_disable_msi(ha->pdev);
1472                 }
1473         }
1474
1475         /*
1476          * Prevent interrupts from falling back to INTx mode in cases where
1477          * interrupts cannot get acquired through MSI-X or MSI mode.
1478          */
1479         if (is_qla8022(ha)) {
1480                 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
1481                 goto irq_not_attached;
1482         }
1483 try_intx:
1484         /* Trying INTx */
1485         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1486             IRQF_SHARED, DRIVER_NAME, ha);
1487         if (!ret) {
1488                 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1489                 set_bit(AF_INTx_ENABLED, &ha->flags);
1490                 goto irq_attached;
1491
1492         } else {
1493                 ql4_printk(KERN_WARNING, ha,
1494                     "INTx: Failed to reserve interrupt %d already in"
1495                     " use.\n", ha->pdev->irq);
1496                 goto irq_not_attached;
1497         }
1498
1499 irq_attached:
1500         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1501         ha->host->irq = ha->pdev->irq;
1502         ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1503             __func__, ha->pdev->irq);
1504 irq_not_attached:
1505         return ret;
1506 }
1507
1508 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1509 {
1510         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
1511                 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
1512                         qla4_8xxx_disable_msix(ha);
1513                 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1514                         free_irq(ha->pdev->irq, ha);
1515                         pci_disable_msi(ha->pdev);
1516                 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
1517                         free_irq(ha->pdev->irq, ha);
1518                 }
1519         }
1520 }