Pileus Git - ~andy/linux/blob - drivers/scsi/qla4xxx/ql4_isr.c

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2013 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) || is_qla8042(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 static void qla4xxx_update_ipaddr_state(struct scsi_qla_host *ha,
 610                                         uint32_t ipaddr_idx,
 611                                         uint32_t ipaddr_fw_state)
 612 {
 613         uint8_t ipaddr_state;
 614         uint8_t ip_idx;
 615
 616         ip_idx = ipaddr_idx & 0xF;
 617         ipaddr_state = qla4xxx_set_ipaddr_state((uint8_t)ipaddr_fw_state);
 618
 619         switch (ip_idx) {
 620         case 0:
 621                 ha->ip_config.ipv4_addr_state = ipaddr_state;
 622                 break;
 623         case 1:
 624                 ha->ip_config.ipv6_link_local_state = ipaddr_state;
 625                 break;
 626         case 2:
 627                 ha->ip_config.ipv6_addr0_state = ipaddr_state;
 628                 break;
 629         case 3:
 630                 ha->ip_config.ipv6_addr1_state = ipaddr_state;
 631                 break;
 632         default:
 633                 ql4_printk(KERN_INFO, ha, "%s: Invalid IPADDR index %d\n",
 634                            __func__, ip_idx);
 635         }
 636 }
 637
 638
 639 /**
 640  * qla4xxx_isr_decode_mailbox - decodes mailbox status
 641  * @ha: Pointer to host adapter structure.
 642  * @mailbox_status: Mailbox status.
 643  *
 644  * This routine decodes the mailbox status during the ISR.
 645  * Hardware_lock locked upon entry. runs in interrupt context.
 646  **/
 647 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 648                                        uint32_t mbox_status)
 649 {
 650         int i;
 651         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 652         __le32 __iomem *mailbox_out;
 653         uint32_t opcode = 0;
 654
 655         if (is_qla8032(ha) || is_qla8042(ha))
 656                 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
 657         else if (is_qla8022(ha))
 658                 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
 659         else
 660                 mailbox_out = &ha->reg->mailbox[0];
 661
 662         if ((mbox_status == MBOX_STS_BUSY) ||
 663             (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 664             (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 665                 ha->mbox_status[0] = mbox_status;
 666
 667                 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 668                         /*
 669                          * Copy all mailbox registers to a temporary
 670                          * location and set mailbox command done flag
 671                          */
 672                         for (i = 0; i < ha->mbox_status_count; i++)
 673                                 ha->mbox_status[i] = readl(&mailbox_out[i]);
 674
 675                         set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 676
 677                         if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
 678                                 complete(&ha->mbx_intr_comp);
 679                 }
 680         } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 681                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 682                         mbox_sts[i] = readl(&mailbox_out[i]);
 683
 684                 /* Immediately process the AENs that don't require much work.
 685                  * Only queue the database_changed AENs */
 686                 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 687                         for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 688                                 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 689                                     mbox_sts[i];
 690                         ha->aen_log.count++;
 691                 }
 692                 switch (mbox_status) {
 693                 case MBOX_ASTS_SYSTEM_ERROR:
 694                         /* Log Mailbox registers */
 695                         ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
 696                         qla4xxx_dump_registers(ha);
 697
 698                         if ((is_qla8022(ha) && ql4xdontresethba) ||
 699                             ((is_qla8032(ha) || is_qla8042(ha)) &&
 700                              qla4_83xx_idc_dontreset(ha))) {
 701                                 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
 702                                     ha->host_no, __func__));
 703                         } else {
 704                                 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 705                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 706                         }
 707                         break;
 708
 709                 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 710                 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 711                 case MBOX_ASTS_NVRAM_INVALID:
 712                 case MBOX_ASTS_IP_ADDRESS_CHANGED:
 713                 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 714                         DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 715                                       "Reset HA\n", ha->host_no, mbox_status));
 716                         if (is_qla80XX(ha))
 717                                 set_bit(DPC_RESET_HA_FW_CONTEXT,
 718                                         &ha->dpc_flags);
 719                         else
 720                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 721                         break;
 722
 723                 case MBOX_ASTS_LINK_UP:
 724                         set_bit(AF_LINK_UP, &ha->flags);
 725                         if (test_bit(AF_INIT_DONE, &ha->flags))
 726                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 727
 728                         ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
 729                         qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
 730                                               sizeof(mbox_sts),
 731                                               (uint8_t *) mbox_sts);
 732
 733                         if ((is_qla8032(ha) || is_qla8042(ha)) &&
 734                             ha->notify_link_up_comp)
 735                                 complete(&ha->link_up_comp);
 736
 737                         break;
 738
 739                 case MBOX_ASTS_LINK_DOWN:
 740                         clear_bit(AF_LINK_UP, &ha->flags);
 741                         if (test_bit(AF_INIT_DONE, &ha->flags)) {
 742                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 743                                 qla4xxx_wake_dpc(ha);
 744                         }
 745
 746                         ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
 747                         qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
 748                                               sizeof(mbox_sts),
 749                                               (uint8_t *) mbox_sts);
 750                         break;
 751
 752                 case MBOX_ASTS_HEARTBEAT:
 753                         ha->seconds_since_last_heartbeat = 0;
 754                         break;
 755
 756                 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 757                         DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 758                                       "ACQUIRED\n", ha->host_no, mbox_status));
 759                         set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 760                         break;
 761
 762                 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 763                 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 764                                                            * mode
 765                                                            * only */
 766                 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 767                 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 768                 case MBOX_ASTS_SUBNET_STATE_CHANGE:
 769                 case MBOX_ASTS_DUPLICATE_IP:
 770                         /* No action */
 771                         DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 772                                       mbox_status));
 773                         break;
 774
 775                 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 776                         printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
 777                             "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
 778                             mbox_sts[2], mbox_sts[3]);
 779
 780                         qla4xxx_update_ipaddr_state(ha, mbox_sts[5],
 781                                                     mbox_sts[3]);
 782                         /* mbox_sts[2] = Old ACB state
 783                          * mbox_sts[3] = new ACB state */
 784                         if ((mbox_sts[3] == ACB_STATE_VALID) &&
 785                             ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
 786                             (mbox_sts[2] == ACB_STATE_ACQUIRING))) {
 787                                 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 788                         } else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
 789                                    (mbox_sts[2] == ACB_STATE_VALID)) {
 790                                 if (is_qla80XX(ha))
 791                                         set_bit(DPC_RESET_HA_FW_CONTEXT,
 792                                                 &ha->dpc_flags);
 793                                 else
 794                                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 795                         } else if (mbox_sts[3] == ACB_STATE_DISABLING) {
 796                                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n",
 797                                            ha->host_no, __func__);
 798                         } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) {
 799                                 complete(&ha->disable_acb_comp);
 800                                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n",
 801                                            ha->host_no, __func__);
 802                         }
 803                         break;
 804
 805                 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 806                 case MBOX_ASTS_DNS:
 807                         /* No action */
 808                         DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 809                                       "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 810                                       ha->host_no, mbox_sts[0],
 811                                       mbox_sts[1], mbox_sts[2]));
 812                         break;
 813
 814                 case MBOX_ASTS_SELF_TEST_FAILED:
 815                 case MBOX_ASTS_LOGIN_FAILED:
 816                         /* No action */
 817                         DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 818                                       "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 819                                       ha->host_no, mbox_sts[0], mbox_sts[1],
 820                                       mbox_sts[2], mbox_sts[3]));
 821                         break;
 822
 823                 case MBOX_ASTS_DATABASE_CHANGED:
 824                         /* Queue AEN information and process it in the DPC
 825                          * routine */
 826                         if (ha->aen_q_count > 0) {
 827
 828                                 /* decrement available counter */
 829                                 ha->aen_q_count--;
 830
 831                                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 832                                         ha->aen_q[ha->aen_in].mbox_sts[i] =
 833                                             mbox_sts[i];
 834
 835                                 /* print debug message */
 836                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
 837                                               "mb1:0x%x mb2:0x%x mb3:0x%x "
 838                                               "mb4:0x%x mb5:0x%x\n",
 839                                               ha->host_no, ha->aen_in,
 840                                               mbox_sts[0], mbox_sts[1],
 841                                               mbox_sts[2], mbox_sts[3],
 842                                               mbox_sts[4], mbox_sts[5]));
 843
 844                                 /* advance pointer */
 845                                 ha->aen_in++;
 846                                 if (ha->aen_in == MAX_AEN_ENTRIES)
 847                                         ha->aen_in = 0;
 848
 849                                 /* The DPC routine will process the aen */
 850                                 set_bit(DPC_AEN, &ha->dpc_flags);
 851                         } else {
 852                                 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 853                                               "overflowed!  AEN LOST!!\n",
 854                                               ha->host_no, __func__,
 855                                               mbox_sts[0]));
 856
 857                                 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 858                                               ha->host_no));
 859
 860                                 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 861                                         DEBUG2(printk("AEN[%d] %04x %04x %04x "
 862                                                       "%04x\n", i, mbox_sts[0],
 863                                                       mbox_sts[1], mbox_sts[2],
 864                                                       mbox_sts[3]));
 865                                 }
 866                         }
 867                         break;
 868
 869                 case MBOX_ASTS_TXSCVR_INSERTED:
 870                         DEBUG2(printk(KERN_WARNING
 871                             "scsi%ld: AEN %04x Transceiver"
 872                             " inserted\n",  ha->host_no, mbox_sts[0]));
 873                         break;
 874
 875                 case MBOX_ASTS_TXSCVR_REMOVED:
 876                         DEBUG2(printk(KERN_WARNING
 877                             "scsi%ld: AEN %04x Transceiver"
 878                             " removed\n",  ha->host_no, mbox_sts[0]));
 879                         break;
 880
 881                 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
 882                         if (is_qla8032(ha) || is_qla8042(ha)) {
 883                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 884                                                   "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 885                                                   ha->host_no, mbox_sts[0],
 886                                                   mbox_sts[1], mbox_sts[2],
 887                                                   mbox_sts[3], mbox_sts[4]));
 888                                 opcode = mbox_sts[1] >> 16;
 889                                 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
 890                                     (opcode == MBOX_CMD_PORT_RESET)) {
 891                                         set_bit(DPC_POST_IDC_ACK,
 892                                                 &ha->dpc_flags);
 893                                         ha->idc_info.request_desc = mbox_sts[1];
 894                                         ha->idc_info.info1 = mbox_sts[2];
 895                                         ha->idc_info.info2 = mbox_sts[3];
 896                                         ha->idc_info.info3 = mbox_sts[4];
 897                                         qla4xxx_wake_dpc(ha);
 898                                 }
 899                         }
 900                         break;
 901
 902                 case MBOX_ASTS_IDC_COMPLETE:
 903                         if (is_qla8032(ha) || is_qla8042(ha)) {
 904                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 905                                                   "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 906                                                   ha->host_no, mbox_sts[0],
 907                                                   mbox_sts[1], mbox_sts[2],
 908                                                   mbox_sts[3], mbox_sts[4]));
 909                                 DEBUG2(ql4_printk(KERN_INFO, ha,
 910                                                   "scsi:%ld: AEN %04x IDC Complete notification\n",
 911                                                   ha->host_no, mbox_sts[0]));
 912
 913                                 opcode = mbox_sts[1] >> 16;
 914                                 if (ha->notify_idc_comp)
 915                                         complete(&ha->idc_comp);
 916
 917                                 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
 918                                     (opcode == MBOX_CMD_PORT_RESET))
 919                                         ha->idc_info.info2 = mbox_sts[3];
 920
 921                                 if (qla4_83xx_loopback_in_progress(ha)) {
 922                                         set_bit(AF_LOOPBACK, &ha->flags);
 923                                 } else {
 924                                         clear_bit(AF_LOOPBACK, &ha->flags);
 925                                         if (ha->saved_acb)
 926                                                 set_bit(DPC_RESTORE_ACB,
 927                                                         &ha->dpc_flags);
 928                                 }
 929                                 qla4xxx_wake_dpc(ha);
 930                         }
 931                         break;
 932
 933                 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
 934                         DEBUG2(ql4_printk(KERN_INFO, ha,
 935                                           "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",
 936                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 937                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 938                                           mbox_sts[5]));
 939                         DEBUG2(ql4_printk(KERN_INFO, ha,
 940                                           "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
 941                                           ha->host_no, mbox_sts[0]));
 942                         break;
 943
 944                 case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION:
 945                         DEBUG2(ql4_printk(KERN_INFO, ha,
 946                                           "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",
 947                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 948                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 949                                           mbox_sts[5]));
 950                         DEBUG2(ql4_printk(KERN_INFO, ha,
 951                                           "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n",
 952                                           ha->host_no, mbox_sts[0]));
 953                         /* new IDC timeout */
 954                         ha->idc_extend_tmo = mbox_sts[1];
 955                         break;
 956
 957                 case MBOX_ASTS_INITIALIZATION_FAILED:
 958                         DEBUG2(ql4_printk(KERN_INFO, ha,
 959                                           "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
 960                                           ha->host_no, mbox_sts[0],
 961                                           mbox_sts[3]));
 962                         break;
 963
 964                 case MBOX_ASTS_SYSTEM_WARNING_EVENT:
 965                         DEBUG2(ql4_printk(KERN_WARNING, ha,
 966                                           "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",
 967                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 968                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 969                                           mbox_sts[5]));
 970                         break;
 971
 972                 case MBOX_ASTS_DCBX_CONF_CHANGE:
 973                         DEBUG2(ql4_printk(KERN_INFO, ha,
 974                                           "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",
 975                                           ha->host_no, mbox_sts[0], mbox_sts[1],
 976                                           mbox_sts[2], mbox_sts[3], mbox_sts[4],
 977                                           mbox_sts[5]));
 978                         DEBUG2(ql4_printk(KERN_INFO, ha,
 979                                           "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
 980                                           ha->host_no, mbox_sts[0]));
 981                         break;
 982
 983                 default:
 984                         DEBUG2(printk(KERN_WARNING
 985                                       "scsi%ld: AEN %04x UNKNOWN\n",
 986                                       ha->host_no, mbox_sts[0]));
 987                         break;
 988                 }
 989         } else {
 990                 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
 991                               ha->host_no, mbox_status));
 992
 993                 ha->mbox_status[0] = mbox_status;
 994         }
 995 }
 996
 997 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
 998                                          uint32_t intr_status)
 999 {
1000         /* Process mailbox/asynch event interrupt.*/
1001         if (intr_status) {
1002                 qla4xxx_isr_decode_mailbox(ha,
1003                                 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1004                 /* clear the interrupt */
1005                 writel(0, &ha->qla4_83xx_reg->risc_intr);
1006         } else {
1007                 qla4xxx_process_response_queue(ha);
1008         }
1009
1010         /* clear the interrupt */
1011         writel(0, &ha->qla4_83xx_reg->mb_int_mask);
1012 }
1013
1014 /**
1015  * qla4_82xx_interrupt_service_routine - isr
1016  * @ha: pointer to host adapter structure.
1017  *
1018  * This is the main interrupt service routine.
1019  * hardware_lock locked upon entry. runs in interrupt context.
1020  **/
1021 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
1022     uint32_t intr_status)
1023 {
1024         /* Process response queue interrupt. */
1025         if (intr_status & HSRX_RISC_IOCB_INT)
1026                 qla4xxx_process_response_queue(ha);
1027
1028         /* Process mailbox/asynch event interrupt.*/
1029         if (intr_status & HSRX_RISC_MB_INT)
1030                 qla4xxx_isr_decode_mailbox(ha,
1031                     readl(&ha->qla4_82xx_reg->mailbox_out[0]));
1032
1033         /* clear the interrupt */
1034         writel(0, &ha->qla4_82xx_reg->host_int);
1035         readl(&ha->qla4_82xx_reg->host_int);
1036 }
1037
1038 /**
1039  * qla4xxx_interrupt_service_routine - isr
1040  * @ha: pointer to host adapter structure.
1041  *
1042  * This is the main interrupt service routine.
1043  * hardware_lock locked upon entry. runs in interrupt context.
1044  **/
1045 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
1046                                        uint32_t intr_status)
1047 {
1048         /* Process response queue interrupt. */
1049         if (intr_status & CSR_SCSI_COMPLETION_INTR)
1050                 qla4xxx_process_response_queue(ha);
1051
1052         /* Process mailbox/asynch event  interrupt.*/
1053         if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
1054                 qla4xxx_isr_decode_mailbox(ha,
1055                                            readl(&ha->reg->mailbox[0]));
1056
1057                 /* Clear Mailbox Interrupt */
1058                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1059                        &ha->reg->ctrl_status);
1060                 readl(&ha->reg->ctrl_status);
1061         }
1062 }
1063
1064 /**
1065  * qla4_82xx_spurious_interrupt - processes spurious interrupt
1066  * @ha: pointer to host adapter structure.
1067  * @reqs_count: .
1068  *
1069  **/
1070 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
1071     uint8_t reqs_count)
1072 {
1073         if (reqs_count)
1074                 return;
1075
1076         DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
1077         if (is_qla8022(ha)) {
1078                 writel(0, &ha->qla4_82xx_reg->host_int);
1079                 if (test_bit(AF_INTx_ENABLED, &ha->flags))
1080                         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
1081                             0xfbff);
1082         }
1083         ha->spurious_int_count++;
1084 }
1085
1086 /**
1087  * qla4xxx_intr_handler - hardware interrupt handler.
1088  * @irq: Unused
1089  * @dev_id: Pointer to host adapter structure
1090  **/
1091 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
1092 {
1093         struct scsi_qla_host *ha;
1094         uint32_t intr_status;
1095         unsigned long flags = 0;
1096         uint8_t reqs_count = 0;
1097
1098         ha = (struct scsi_qla_host *) dev_id;
1099         if (!ha) {
1100                 DEBUG2(printk(KERN_INFO
1101                               "qla4xxx: Interrupt with NULL host ptr\n"));
1102                 return IRQ_NONE;
1103         }
1104
1105         spin_lock_irqsave(&ha->hardware_lock, flags);
1106
1107         ha->isr_count++;
1108         /*
1109          * Repeatedly service interrupts up to a maximum of
1110          * MAX_REQS_SERVICED_PER_INTR
1111          */
1112         while (1) {
1113                 /*
1114                  * Read interrupt status
1115                  */
1116                 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1117                     ha->response_out)
1118                         intr_status = CSR_SCSI_COMPLETION_INTR;
1119                 else
1120                         intr_status = readl(&ha->reg->ctrl_status);
1121
1122                 if ((intr_status &
1123                     (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1124                         if (reqs_count == 0)
1125                                 ha->spurious_int_count++;
1126                         break;
1127                 }
1128
1129                 if (intr_status & CSR_FATAL_ERROR) {
1130                         DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1131                                       "Status 0x%04x\n", ha->host_no,
1132                                       readl(isp_port_error_status (ha))));
1133
1134                         /* Issue Soft Reset to clear this error condition.
1135                          * This will prevent the RISC from repeatedly
1136                          * interrupting the driver; thus, allowing the DPC to
1137                          * get scheduled to continue error recovery.
1138                          * NOTE: Disabling RISC interrupts does not work in
1139                          * this case, as CSR_FATAL_ERROR overrides
1140                          * CSR_SCSI_INTR_ENABLE */
1141                         if ((readl(&ha->reg->ctrl_status) &
1142                              CSR_SCSI_RESET_INTR) == 0) {
1143                                 writel(set_rmask(CSR_SOFT_RESET),
1144                                        &ha->reg->ctrl_status);
1145                                 readl(&ha->reg->ctrl_status);
1146                         }
1147
1148                         writel(set_rmask(CSR_FATAL_ERROR),
1149                                &ha->reg->ctrl_status);
1150                         readl(&ha->reg->ctrl_status);
1151
1152                         __qla4xxx_disable_intrs(ha);
1153
1154                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
1155
1156                         break;
1157                 } else if (intr_status & CSR_SCSI_RESET_INTR) {
1158                         clear_bit(AF_ONLINE, &ha->flags);
1159                         __qla4xxx_disable_intrs(ha);
1160
1161                         writel(set_rmask(CSR_SCSI_RESET_INTR),
1162                                &ha->reg->ctrl_status);
1163                         readl(&ha->reg->ctrl_status);
1164
1165                         if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1166                                 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1167
1168                         break;
1169                 } else if (intr_status & INTR_PENDING) {
1170                         ha->isp_ops->interrupt_service_routine(ha, intr_status);
1171                         ha->total_io_count++;
1172                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1173                                 break;
1174                 }
1175         }
1176
1177         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1178
1179         return IRQ_HANDLED;
1180 }
1181
1182 /**
1183  * qla4_82xx_intr_handler - hardware interrupt handler.
1184  * @irq: Unused
1185  * @dev_id: Pointer to host adapter structure
1186  **/
1187 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1188 {
1189         struct scsi_qla_host *ha = dev_id;
1190         uint32_t intr_status;
1191         uint32_t status;
1192         unsigned long flags = 0;
1193         uint8_t reqs_count = 0;
1194
1195         if (unlikely(pci_channel_offline(ha->pdev)))
1196                 return IRQ_HANDLED;
1197
1198         ha->isr_count++;
1199         status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1200         if (!(status & ha->nx_legacy_intr.int_vec_bit))
1201                 return IRQ_NONE;
1202
1203         status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1204         if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1205                 DEBUG7(ql4_printk(KERN_INFO, ha,
1206                                   "%s legacy Int not triggered\n", __func__));
1207                 return IRQ_NONE;
1208         }
1209
1210         /* clear the interrupt */
1211         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1212
1213         /* read twice to ensure write is flushed */
1214         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1215         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1216
1217         spin_lock_irqsave(&ha->hardware_lock, flags);
1218         while (1) {
1219                 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1220                     ISRX_82XX_RISC_INT)) {
1221                         qla4_82xx_spurious_interrupt(ha, reqs_count);
1222                         break;
1223                 }
1224                 intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1225                 if ((intr_status &
1226                     (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0)  {
1227                         qla4_82xx_spurious_interrupt(ha, reqs_count);
1228                         break;
1229                 }
1230
1231                 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1232
1233                 /* Enable Interrupt */
1234                 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1235
1236                 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1237                         break;
1238         }
1239
1240         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1241         return IRQ_HANDLED;
1242 }
1243
1244 #define LEG_INT_PTR_B31         (1 << 31)
1245 #define LEG_INT_PTR_B30         (1 << 30)
1246 #define PF_BITS_MASK            (0xF << 16)
1247
1248 /**
1249  * qla4_83xx_intr_handler - hardware interrupt handler.
1250  * @irq: Unused
1251  * @dev_id: Pointer to host adapter structure
1252  **/
1253 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1254 {
1255         struct scsi_qla_host *ha = dev_id;
1256         uint32_t leg_int_ptr = 0;
1257         unsigned long flags = 0;
1258
1259         ha->isr_count++;
1260         leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1261
1262         /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1263         if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1264                 DEBUG7(ql4_printk(KERN_ERR, ha,
1265                                   "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1266                                   __func__));
1267                 return IRQ_NONE;
1268         }
1269
1270         /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1271         if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1272                 DEBUG7(ql4_printk(KERN_ERR, ha,
1273                                   "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1274                                   __func__, (leg_int_ptr & PF_BITS_MASK),
1275                                   ha->pf_bit));
1276                 return IRQ_NONE;
1277         }
1278
1279         /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1280          * Control register and poll till Legacy Interrupt Pointer register
1281          * bit30 is 0.
1282          */
1283         writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1284         do {
1285                 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1286                 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1287                         break;
1288         } while (leg_int_ptr & LEG_INT_PTR_B30);
1289
1290         spin_lock_irqsave(&ha->hardware_lock, flags);
1291         leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1292         ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1293         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1294
1295         return IRQ_HANDLED;
1296 }
1297
1298 irqreturn_t
1299 qla4_8xxx_msi_handler(int irq, void *dev_id)
1300 {
1301         struct scsi_qla_host *ha;
1302
1303         ha = (struct scsi_qla_host *) dev_id;
1304         if (!ha) {
1305                 DEBUG2(printk(KERN_INFO
1306                     "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1307                 return IRQ_NONE;
1308         }
1309
1310         ha->isr_count++;
1311         /* clear the interrupt */
1312         qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1313
1314         /* read twice to ensure write is flushed */
1315         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1316         qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1317
1318         return qla4_8xxx_default_intr_handler(irq, dev_id);
1319 }
1320
1321 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1322 {
1323         struct scsi_qla_host *ha = dev_id;
1324         unsigned long flags;
1325         uint32_t ival = 0;
1326
1327         spin_lock_irqsave(&ha->hardware_lock, flags);
1328
1329         ival = readl(&ha->qla4_83xx_reg->risc_intr);
1330         if (ival == 0) {
1331                 ql4_printk(KERN_INFO, ha,
1332                            "%s: It is a spurious mailbox interrupt!\n",
1333                            __func__);
1334                 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1335                 ival &= ~INT_MASK_FW_MB;
1336                 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1337                 goto exit;
1338         }
1339
1340         qla4xxx_isr_decode_mailbox(ha,
1341                                    readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1342         writel(0, &ha->qla4_83xx_reg->risc_intr);
1343         ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1344         ival &= ~INT_MASK_FW_MB;
1345         writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1346         ha->isr_count++;
1347 exit:
1348         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1349         return IRQ_HANDLED;
1350 }
1351
1352 /**
1353  * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1354  * @irq: Unused
1355  * @dev_id: Pointer to host adapter structure
1356  *
1357  * This interrupt handler is called directly for MSI-X, and
1358  * called indirectly for MSI.
1359  **/
1360 irqreturn_t
1361 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1362 {
1363         struct scsi_qla_host *ha = dev_id;
1364         unsigned long   flags;
1365         uint32_t intr_status;
1366         uint8_t reqs_count = 0;
1367
1368         if (is_qla8032(ha) || is_qla8042(ha)) {
1369                 qla4_83xx_mailbox_intr_handler(irq, dev_id);
1370         } else {
1371                 spin_lock_irqsave(&ha->hardware_lock, flags);
1372                 while (1) {
1373                         if (!(readl(&ha->qla4_82xx_reg->host_int) &
1374                             ISRX_82XX_RISC_INT)) {
1375                                 qla4_82xx_spurious_interrupt(ha, reqs_count);
1376                                 break;
1377                         }
1378
1379                         intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1380                         if ((intr_status &
1381                             (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1382                                 qla4_82xx_spurious_interrupt(ha, reqs_count);
1383                                 break;
1384                         }
1385
1386                         ha->isp_ops->interrupt_service_routine(ha, intr_status);
1387
1388                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1389                                 break;
1390                 }
1391                 ha->isr_count++;
1392                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1393         }
1394         return IRQ_HANDLED;
1395 }
1396
1397 irqreturn_t
1398 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1399 {
1400         struct scsi_qla_host *ha = dev_id;
1401         unsigned long flags;
1402         uint32_t ival = 0;
1403
1404         spin_lock_irqsave(&ha->hardware_lock, flags);
1405         if (is_qla8032(ha) || is_qla8042(ha)) {
1406                 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1407                 if (ival == 0) {
1408                         ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1409                                    __func__);
1410                         goto exit_msix_rsp_q;
1411                 }
1412                 qla4xxx_process_response_queue(ha);
1413                 writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1414         } else {
1415                 qla4xxx_process_response_queue(ha);
1416                 writel(0, &ha->qla4_82xx_reg->host_int);
1417         }
1418         ha->isr_count++;
1419 exit_msix_rsp_q:
1420         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1421         return IRQ_HANDLED;
1422 }
1423
1424 /**
1425  * qla4xxx_process_aen - processes AENs generated by firmware
1426  * @ha: pointer to host adapter structure.
1427  * @process_aen: type of AENs to process
1428  *
1429  * Processes specific types of Asynchronous Events generated by firmware.
1430  * The type of AENs to process is specified by process_aen and can be
1431  *      PROCESS_ALL_AENS         0
1432  *      FLUSH_DDB_CHANGED_AENS   1
1433  *      RELOGIN_DDB_CHANGED_AENS 2
1434  **/
1435 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1436 {
1437         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1438         struct aen *aen;
1439         int i;
1440         unsigned long flags;
1441
1442         spin_lock_irqsave(&ha->hardware_lock, flags);
1443         while (ha->aen_out != ha->aen_in) {
1444                 aen = &ha->aen_q[ha->aen_out];
1445                 /* copy aen information to local structure */
1446                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1447                         mbox_sts[i] = aen->mbox_sts[i];
1448
1449                 ha->aen_q_count++;
1450                 ha->aen_out++;
1451
1452                 if (ha->aen_out == MAX_AEN_ENTRIES)
1453                         ha->aen_out = 0;
1454
1455                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1456
1457                 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1458                         " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1459                         (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1460                         mbox_sts[0], mbox_sts[1], mbox_sts[2],
1461                         mbox_sts[3], mbox_sts[4]));
1462
1463                 switch (mbox_sts[0]) {
1464                 case MBOX_ASTS_DATABASE_CHANGED:
1465                         switch (process_aen) {
1466                         case FLUSH_DDB_CHANGED_AENS:
1467                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1468                                               "[%d] state=%04x FLUSHED!\n",
1469                                               ha->host_no, ha->aen_out,
1470                                               mbox_sts[0], mbox_sts[2],
1471                                               mbox_sts[3]));
1472                                 break;
1473                         case PROCESS_ALL_AENS:
1474                         default:
1475                                 /* Specific device. */
1476                                 if (mbox_sts[1] == 1)
1477                                         qla4xxx_process_ddb_changed(ha,
1478                                                 mbox_sts[2], mbox_sts[3],
1479                                                 mbox_sts[4]);
1480                                 break;
1481                         }
1482                 }
1483                 spin_lock_irqsave(&ha->hardware_lock, flags);
1484         }
1485         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1486 }
1487
1488 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1489 {
1490         int ret;
1491
1492         if (is_qla40XX(ha))
1493                 goto try_intx;
1494
1495         if (ql4xenablemsix == 2) {
1496                 /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */
1497                 if (is_qla8032(ha) || is_qla8042(ha)) {
1498                         ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n",
1499                                    __func__, ha->pdev->device);
1500                         goto try_intx;
1501                 }
1502                 goto try_msi;
1503         }
1504
1505         if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1506                 goto try_intx;
1507
1508         /* Trying MSI-X */
1509         ret = qla4_8xxx_enable_msix(ha);
1510         if (!ret) {
1511                 DEBUG2(ql4_printk(KERN_INFO, ha,
1512                     "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1513                 goto irq_attached;
1514         } else {
1515                 if (is_qla8032(ha) || is_qla8042(ha)) {
1516                         ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n",
1517                                    __func__, ha->pdev->device, ret);
1518                         goto try_intx;
1519                 }
1520         }
1521
1522         ql4_printk(KERN_WARNING, ha,
1523             "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1524
1525 try_msi:
1526         /* Trying MSI */
1527         ret = pci_enable_msi(ha->pdev);
1528         if (!ret) {
1529                 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1530                         0, DRIVER_NAME, ha);
1531                 if (!ret) {
1532                         DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1533                         set_bit(AF_MSI_ENABLED, &ha->flags);
1534                         goto irq_attached;
1535                 } else {
1536                         ql4_printk(KERN_WARNING, ha,
1537                             "MSI: Failed to reserve interrupt %d "
1538                             "already in use.\n", ha->pdev->irq);
1539                         pci_disable_msi(ha->pdev);
1540                 }
1541         }
1542
1543         /*
1544          * Prevent interrupts from falling back to INTx mode in cases where
1545          * interrupts cannot get acquired through MSI-X or MSI mode.
1546          */
1547         if (is_qla8022(ha)) {
1548                 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
1549                 goto irq_not_attached;
1550         }
1551 try_intx:
1552         /* Trying INTx */
1553         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1554             IRQF_SHARED, DRIVER_NAME, ha);
1555         if (!ret) {
1556                 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1557                 set_bit(AF_INTx_ENABLED, &ha->flags);
1558                 goto irq_attached;
1559
1560         } else {
1561                 ql4_printk(KERN_WARNING, ha,
1562                     "INTx: Failed to reserve interrupt %d already in"
1563                     " use.\n", ha->pdev->irq);
1564                 goto irq_not_attached;
1565         }
1566
1567 irq_attached:
1568         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1569         ha->host->irq = ha->pdev->irq;
1570         ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1571             __func__, ha->pdev->irq);
1572 irq_not_attached:
1573         return ret;
1574 }
1575
1576 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1577 {
1578         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
1579                 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
1580                         qla4_8xxx_disable_msix(ha);
1581                 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1582                         free_irq(ha->pdev->irq, ha);
1583                         pci_disable_msi(ha->pdev);
1584                 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
1585                         free_irq(ha->pdev->irq, ha);
1586                 }
1587         }
1588 }