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

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2010 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                 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
 127                               "handle 0x%x, sp=%p. This cmd may have already "
 128                               "been completed.\n", ha->host_no, __func__,
 129                               le32_to_cpu(sts_entry->handle), srb));
 130                 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:"
 131                     " handle=0x%0x\n", __func__, sts_entry->handle);
 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                 /*
 247                  * If there is scsi_status, it takes precedense over
 248                  * underflow condition.
 249                  */
 250                 if (scsi_status != 0) {
 251                         cmd->result = DID_OK << 16 | scsi_status;
 252
 253                         if (scsi_status != SCSI_CHECK_CONDITION)
 254                                 break;
 255
 256                         /* Copy Sense Data into sense buffer. */
 257                         qla4xxx_copy_sense(ha, sts_entry, srb);
 258                 } else {
 259                         /*
 260                          * If RISC reports underrun and target does not
 261                          * report it then we must have a lost frame, so
 262                          * tell upper layer to retry it by reporting a
 263                          * bus busy.
 264                          */
 265                         if ((sts_entry->iscsiFlags &
 266                              ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
 267                                 cmd->result = DID_BUS_BUSY << 16;
 268                         } else if ((scsi_bufflen(cmd) - residual) <
 269                                    cmd->underflow) {
 270                                 /*
 271                                  * Handle mid-layer underflow???
 272                                  *
 273                                  * For kernels less than 2.4, the driver must
 274                                  * return an error if an underflow is detected.
 275                                  * For kernels equal-to and above 2.4, the
 276                                  * mid-layer will appearantly handle the
 277                                  * underflow by detecting the residual count --
 278                                  * unfortunately, we do not see where this is
 279                                  * actually being done.  In the interim, we
 280                                  * will return DID_ERROR.
 281                                  */
 282                                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
 283                                         "Mid-layer Data underrun1, "
 284                                         "xferlen = 0x%x, "
 285                                         "residual = 0x%x\n", ha->host_no,
 286                                         cmd->device->channel,
 287                                         cmd->device->id,
 288                                         cmd->device->lun, __func__,
 289                                         scsi_bufflen(cmd), residual));
 290
 291                                 cmd->result = DID_ERROR << 16;
 292                         } else {
 293                                 cmd->result = DID_OK << 16;
 294                         }
 295                 }
 296                 break;
 297
 298         case SCS_DEVICE_LOGGED_OUT:
 299         case SCS_DEVICE_UNAVAILABLE:
 300                 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
 301                     "state: 0x%x\n", ha->host_no,
 302                     cmd->device->channel, cmd->device->id,
 303                     cmd->device->lun, sts_entry->completionStatus));
 304                 /*
 305                  * Mark device missing so that we won't continue to
 306                  * send I/O to this device.  We should get a ddb
 307                  * state change AEN soon.
 308                  */
 309                 if (iscsi_is_session_online(ddb_entry->sess))
 310                         qla4xxx_mark_device_missing(ddb_entry->sess);
 311
 312                 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
 313                 break;
 314
 315         case SCS_QUEUE_FULL:
 316                 /*
 317                  * SCSI Mid-Layer handles device queue full
 318                  */
 319                 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
 320                 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
 321                               "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
 322                               " iResp=%02x\n", ha->host_no, cmd->device->id,
 323                               cmd->device->lun, __func__,
 324                               sts_entry->completionStatus,
 325                               sts_entry->scsiStatus, sts_entry->state_flags,
 326                               sts_entry->iscsiFlags,
 327                               sts_entry->iscsiResponse));
 328                 break;
 329
 330         default:
 331                 cmd->result = DID_ERROR << 16;
 332                 break;
 333         }
 334
 335 status_entry_exit:
 336
 337         /* complete the request, if not waiting for status_continuation pkt */
 338         srb->cc_stat = sts_entry->completionStatus;
 339         if (ha->status_srb == NULL)
 340                 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
 341 }
 342
 343 /**
 344  * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C)
 345  * @ha: Pointer to host adapter structure.
 346  * @sts_entry: Pointer to status entry structure.
 347  **/
 348 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha,
 349                                           struct passthru_status *sts_entry)
 350 {
 351         struct iscsi_task *task;
 352         struct ddb_entry *ddb_entry;
 353         struct ql4_task_data *task_data;
 354         struct iscsi_cls_conn *cls_conn;
 355         struct iscsi_conn *conn;
 356         itt_t itt;
 357         uint32_t fw_ddb_index;
 358
 359         itt = sts_entry->handle;
 360         fw_ddb_index = le32_to_cpu(sts_entry->target);
 361
 362         ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
 363
 364         if (ddb_entry == NULL) {
 365                 ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n",
 366                            __func__, sts_entry->target);
 367                 return;
 368         }
 369
 370         cls_conn = ddb_entry->conn;
 371         conn = cls_conn->dd_data;
 372         spin_lock(&conn->session->lock);
 373         task = iscsi_itt_to_task(conn, itt);
 374         spin_unlock(&conn->session->lock);
 375
 376         if (task == NULL) {
 377                 ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__);
 378                 return;
 379         }
 380
 381         task_data = task->dd_data;
 382         memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status));
 383         ha->req_q_count += task_data->iocb_req_cnt;
 384         ha->iocb_cnt -= task_data->iocb_req_cnt;
 385         queue_work(ha->task_wq, &task_data->task_work);
 386 }
 387
 388 /**
 389  * qla4xxx_process_response_queue - process response queue completions
 390  * @ha: Pointer to host adapter structure.
 391  *
 392  * This routine process response queue completions in interrupt context.
 393  * Hardware_lock locked upon entry
 394  **/
 395 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
 396 {
 397         uint32_t count = 0;
 398         struct srb *srb = NULL;
 399         struct status_entry *sts_entry;
 400
 401         /* Process all responses from response queue */
 402         while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
 403                 sts_entry = (struct status_entry *) ha->response_ptr;
 404                 count++;
 405
 406                 /* Advance pointers for next entry */
 407                 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
 408                         ha->response_out = 0;
 409                         ha->response_ptr = ha->response_ring;
 410                 } else {
 411                         ha->response_out++;
 412                         ha->response_ptr++;
 413                 }
 414
 415                 /* process entry */
 416                 switch (sts_entry->hdr.entryType) {
 417                 case ET_STATUS:
 418                         /* Common status */
 419                         qla4xxx_status_entry(ha, sts_entry);
 420                         break;
 421
 422                 case ET_PASSTHRU_STATUS:
 423                         if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
 424                                 qla4xxx_passthru_status_entry(ha,
 425                                         (struct passthru_status *)sts_entry);
 426                         else
 427                                 ql4_printk(KERN_ERR, ha,
 428                                            "%s: Invalid status received\n",
 429                                            __func__);
 430
 431                         break;
 432
 433                 case ET_STATUS_CONTINUATION:
 434                         qla4xxx_status_cont_entry(ha,
 435                                 (struct status_cont_entry *) sts_entry);
 436                         break;
 437
 438                 case ET_COMMAND:
 439                         /* ISP device queue is full. Command not
 440                          * accepted by ISP.  Queue command for
 441                          * later */
 442
 443                         srb = qla4xxx_del_from_active_array(ha,
 444                                                     le32_to_cpu(sts_entry->
 445                                                                 handle));
 446                         if (srb == NULL)
 447                                 goto exit_prq_invalid_handle;
 448
 449                         DEBUG2(printk("scsi%ld: %s: FW device queue full, "
 450                                       "srb %p\n", ha->host_no, __func__, srb));
 451
 452                         /* ETRY normally by sending it back with
 453                          * DID_BUS_BUSY */
 454                         srb->cmd->result = DID_BUS_BUSY << 16;
 455                         kref_put(&srb->srb_ref, qla4xxx_srb_compl);
 456                         break;
 457
 458                 case ET_CONTINUE:
 459                         /* Just throw away the continuation entries */
 460                         DEBUG2(printk("scsi%ld: %s: Continuation entry - "
 461                                       "ignoring\n", ha->host_no, __func__));
 462                         break;
 463
 464                 default:
 465                         /*
 466                          * Invalid entry in response queue, reset RISC
 467                          * firmware.
 468                          */
 469                         DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
 470                                       "response queue \n", ha->host_no,
 471                                       __func__,
 472                                       sts_entry->hdr.entryType));
 473                         goto exit_prq_error;
 474                 }
 475                 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
 476                 wmb();
 477         }
 478
 479         /*
 480          * Tell ISP we're done with response(s). This also clears the interrupt.
 481          */
 482         ha->isp_ops->complete_iocb(ha);
 483
 484         return;
 485
 486 exit_prq_invalid_handle:
 487         DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
 488                       ha->host_no, __func__, srb, sts_entry->hdr.entryType,
 489                       sts_entry->completionStatus));
 490
 491 exit_prq_error:
 492         ha->isp_ops->complete_iocb(ha);
 493         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 494 }
 495
 496 /**
 497  * qla4xxx_isr_decode_mailbox - decodes mailbox status
 498  * @ha: Pointer to host adapter structure.
 499  * @mailbox_status: Mailbox status.
 500  *
 501  * This routine decodes the mailbox status during the ISR.
 502  * Hardware_lock locked upon entry. runs in interrupt context.
 503  **/
 504 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 505                                        uint32_t mbox_status)
 506 {
 507         int i;
 508         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 509
 510         if ((mbox_status == MBOX_STS_BUSY) ||
 511             (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 512             (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 513                 ha->mbox_status[0] = mbox_status;
 514
 515                 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 516                         /*
 517                          * Copy all mailbox registers to a temporary
 518                          * location and set mailbox command done flag
 519                          */
 520                         for (i = 0; i < ha->mbox_status_count; i++)
 521                                 ha->mbox_status[i] = is_qla8022(ha)
 522                                     ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
 523                                     : readl(&ha->reg->mailbox[i]);
 524
 525                         set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 526
 527                         if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
 528                                 complete(&ha->mbx_intr_comp);
 529                 }
 530         } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 531                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 532                         mbox_sts[i] = is_qla8022(ha)
 533                             ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
 534                             : readl(&ha->reg->mailbox[i]);
 535
 536                 /* Immediately process the AENs that don't require much work.
 537                  * Only queue the database_changed AENs */
 538                 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 539                         for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 540                                 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 541                                     mbox_sts[i];
 542                         ha->aen_log.count++;
 543                 }
 544                 switch (mbox_status) {
 545                 case MBOX_ASTS_SYSTEM_ERROR:
 546                         /* Log Mailbox registers */
 547                         ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
 548                         qla4xxx_dump_registers(ha);
 549
 550                         if (ql4xdontresethba) {
 551                                 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
 552                                     ha->host_no, __func__));
 553                         } else {
 554                                 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 555                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 556                         }
 557                         break;
 558
 559                 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 560                 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 561                 case MBOX_ASTS_NVRAM_INVALID:
 562                 case MBOX_ASTS_IP_ADDRESS_CHANGED:
 563                 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 564                         DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 565                                       "Reset HA\n", ha->host_no, mbox_status));
 566                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 567                         break;
 568
 569                 case MBOX_ASTS_LINK_UP:
 570                         set_bit(AF_LINK_UP, &ha->flags);
 571                         if (test_bit(AF_INIT_DONE, &ha->flags))
 572                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 573
 574                         ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
 575                         break;
 576
 577                 case MBOX_ASTS_LINK_DOWN:
 578                         clear_bit(AF_LINK_UP, &ha->flags);
 579                         if (test_bit(AF_INIT_DONE, &ha->flags))
 580                                 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 581
 582                         ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
 583                         break;
 584
 585                 case MBOX_ASTS_HEARTBEAT:
 586                         ha->seconds_since_last_heartbeat = 0;
 587                         break;
 588
 589                 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 590                         DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 591                                       "ACQUIRED\n", ha->host_no, mbox_status));
 592                         set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 593                         break;
 594
 595                 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 596                 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 597                                                            * mode
 598                                                            * only */
 599                 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 600                 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 601                 case MBOX_ASTS_SUBNET_STATE_CHANGE:
 602                 case MBOX_ASTS_DUPLICATE_IP:
 603                         /* No action */
 604                         DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 605                                       mbox_status));
 606                         break;
 607
 608                 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 609                         printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
 610                             "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
 611                             mbox_sts[2], mbox_sts[3]);
 612
 613                         /* mbox_sts[2] = Old ACB state
 614                          * mbox_sts[3] = new ACB state */
 615                         if ((mbox_sts[3] == ACB_STATE_VALID) &&
 616                             ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
 617                             (mbox_sts[2] == ACB_STATE_ACQUIRING)))
 618                                 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 619                         else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
 620                             (mbox_sts[2] == ACB_STATE_VALID))
 621                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 622                         else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
 623                                 complete(&ha->disable_acb_comp);
 624                         break;
 625
 626                 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 627                 case MBOX_ASTS_DNS:
 628                         /* No action */
 629                         DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 630                                       "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 631                                       ha->host_no, mbox_sts[0],
 632                                       mbox_sts[1], mbox_sts[2]));
 633                         break;
 634
 635                 case MBOX_ASTS_SELF_TEST_FAILED:
 636                 case MBOX_ASTS_LOGIN_FAILED:
 637                         /* No action */
 638                         DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 639                                       "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 640                                       ha->host_no, mbox_sts[0], mbox_sts[1],
 641                                       mbox_sts[2], mbox_sts[3]));
 642                         break;
 643
 644                 case MBOX_ASTS_DATABASE_CHANGED:
 645                         /* Queue AEN information and process it in the DPC
 646                          * routine */
 647                         if (ha->aen_q_count > 0) {
 648
 649                                 /* decrement available counter */
 650                                 ha->aen_q_count--;
 651
 652                                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 653                                         ha->aen_q[ha->aen_in].mbox_sts[i] =
 654                                             mbox_sts[i];
 655
 656                                 /* print debug message */
 657                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
 658                                               "mb1:0x%x mb2:0x%x mb3:0x%x "
 659                                               "mb4:0x%x mb5:0x%x\n",
 660                                               ha->host_no, ha->aen_in,
 661                                               mbox_sts[0], mbox_sts[1],
 662                                               mbox_sts[2], mbox_sts[3],
 663                                               mbox_sts[4], mbox_sts[5]));
 664
 665                                 /* advance pointer */
 666                                 ha->aen_in++;
 667                                 if (ha->aen_in == MAX_AEN_ENTRIES)
 668                                         ha->aen_in = 0;
 669
 670                                 /* The DPC routine will process the aen */
 671                                 set_bit(DPC_AEN, &ha->dpc_flags);
 672                         } else {
 673                                 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 674                                               "overflowed!  AEN LOST!!\n",
 675                                               ha->host_no, __func__,
 676                                               mbox_sts[0]));
 677
 678                                 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 679                                               ha->host_no));
 680
 681                                 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 682                                         DEBUG2(printk("AEN[%d] %04x %04x %04x "
 683                                                       "%04x\n", i, mbox_sts[0],
 684                                                       mbox_sts[1], mbox_sts[2],
 685                                                       mbox_sts[3]));
 686                                 }
 687                         }
 688                         break;
 689
 690                 case MBOX_ASTS_TXSCVR_INSERTED:
 691                         DEBUG2(printk(KERN_WARNING
 692                             "scsi%ld: AEN %04x Transceiver"
 693                             " inserted\n",  ha->host_no, mbox_sts[0]));
 694                         break;
 695
 696                 case MBOX_ASTS_TXSCVR_REMOVED:
 697                         DEBUG2(printk(KERN_WARNING
 698                             "scsi%ld: AEN %04x Transceiver"
 699                             " removed\n",  ha->host_no, mbox_sts[0]));
 700                         break;
 701
 702                 default:
 703                         DEBUG2(printk(KERN_WARNING
 704                                       "scsi%ld: AEN %04x UNKNOWN\n",
 705                                       ha->host_no, mbox_sts[0]));
 706                         break;
 707                 }
 708         } else {
 709                 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
 710                               ha->host_no, mbox_status));
 711
 712                 ha->mbox_status[0] = mbox_status;
 713         }
 714 }
 715
 716 /**
 717  * qla4_8xxx_interrupt_service_routine - isr
 718  * @ha: pointer to host adapter structure.
 719  *
 720  * This is the main interrupt service routine.
 721  * hardware_lock locked upon entry. runs in interrupt context.
 722  **/
 723 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
 724     uint32_t intr_status)
 725 {
 726         /* Process response queue interrupt. */
 727         if (intr_status & HSRX_RISC_IOCB_INT)
 728                 qla4xxx_process_response_queue(ha);
 729
 730         /* Process mailbox/asynch event interrupt.*/
 731         if (intr_status & HSRX_RISC_MB_INT)
 732                 qla4xxx_isr_decode_mailbox(ha,
 733                     readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
 734
 735         /* clear the interrupt */
 736         writel(0, &ha->qla4_8xxx_reg->host_int);
 737         readl(&ha->qla4_8xxx_reg->host_int);
 738 }
 739
 740 /**
 741  * qla4xxx_interrupt_service_routine - isr
 742  * @ha: pointer to host adapter structure.
 743  *
 744  * This is the main interrupt service routine.
 745  * hardware_lock locked upon entry. runs in interrupt context.
 746  **/
 747 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
 748                                        uint32_t intr_status)
 749 {
 750         /* Process response queue interrupt. */
 751         if (intr_status & CSR_SCSI_COMPLETION_INTR)
 752                 qla4xxx_process_response_queue(ha);
 753
 754         /* Process mailbox/asynch event  interrupt.*/
 755         if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
 756                 qla4xxx_isr_decode_mailbox(ha,
 757                                            readl(&ha->reg->mailbox[0]));
 758
 759                 /* Clear Mailbox Interrupt */
 760                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
 761                        &ha->reg->ctrl_status);
 762                 readl(&ha->reg->ctrl_status);
 763         }
 764 }
 765
 766 /**
 767  * qla4_8xxx_spurious_interrupt - processes spurious interrupt
 768  * @ha: pointer to host adapter structure.
 769  * @reqs_count: .
 770  *
 771  **/
 772 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
 773     uint8_t reqs_count)
 774 {
 775         if (reqs_count)
 776                 return;
 777
 778         DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
 779         if (is_qla8022(ha)) {
 780                 writel(0, &ha->qla4_8xxx_reg->host_int);
 781                 if (test_bit(AF_INTx_ENABLED, &ha->flags))
 782                         qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
 783                             0xfbff);
 784         }
 785         ha->spurious_int_count++;
 786 }
 787
 788 /**
 789  * qla4xxx_intr_handler - hardware interrupt handler.
 790  * @irq: Unused
 791  * @dev_id: Pointer to host adapter structure
 792  **/
 793 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
 794 {
 795         struct scsi_qla_host *ha;
 796         uint32_t intr_status;
 797         unsigned long flags = 0;
 798         uint8_t reqs_count = 0;
 799
 800         ha = (struct scsi_qla_host *) dev_id;
 801         if (!ha) {
 802                 DEBUG2(printk(KERN_INFO
 803                               "qla4xxx: Interrupt with NULL host ptr\n"));
 804                 return IRQ_NONE;
 805         }
 806
 807         spin_lock_irqsave(&ha->hardware_lock, flags);
 808
 809         ha->isr_count++;
 810         /*
 811          * Repeatedly service interrupts up to a maximum of
 812          * MAX_REQS_SERVICED_PER_INTR
 813          */
 814         while (1) {
 815                 /*
 816                  * Read interrupt status
 817                  */
 818                 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
 819                     ha->response_out)
 820                         intr_status = CSR_SCSI_COMPLETION_INTR;
 821                 else
 822                         intr_status = readl(&ha->reg->ctrl_status);
 823
 824                 if ((intr_status &
 825                     (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
 826                         if (reqs_count == 0)
 827                                 ha->spurious_int_count++;
 828                         break;
 829                 }
 830
 831                 if (intr_status & CSR_FATAL_ERROR) {
 832                         DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
 833                                       "Status 0x%04x\n", ha->host_no,
 834                                       readl(isp_port_error_status (ha))));
 835
 836                         /* Issue Soft Reset to clear this error condition.
 837                          * This will prevent the RISC from repeatedly
 838                          * interrupting the driver; thus, allowing the DPC to
 839                          * get scheduled to continue error recovery.
 840                          * NOTE: Disabling RISC interrupts does not work in
 841                          * this case, as CSR_FATAL_ERROR overrides
 842                          * CSR_SCSI_INTR_ENABLE */
 843                         if ((readl(&ha->reg->ctrl_status) &
 844                              CSR_SCSI_RESET_INTR) == 0) {
 845                                 writel(set_rmask(CSR_SOFT_RESET),
 846                                        &ha->reg->ctrl_status);
 847                                 readl(&ha->reg->ctrl_status);
 848                         }
 849
 850                         writel(set_rmask(CSR_FATAL_ERROR),
 851                                &ha->reg->ctrl_status);
 852                         readl(&ha->reg->ctrl_status);
 853
 854                         __qla4xxx_disable_intrs(ha);
 855
 856                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 857
 858                         break;
 859                 } else if (intr_status & CSR_SCSI_RESET_INTR) {
 860                         clear_bit(AF_ONLINE, &ha->flags);
 861                         __qla4xxx_disable_intrs(ha);
 862
 863                         writel(set_rmask(CSR_SCSI_RESET_INTR),
 864                                &ha->reg->ctrl_status);
 865                         readl(&ha->reg->ctrl_status);
 866
 867                         if (!test_bit(AF_HA_REMOVAL, &ha->flags))
 868                                 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
 869
 870                         break;
 871                 } else if (intr_status & INTR_PENDING) {
 872                         ha->isp_ops->interrupt_service_routine(ha, intr_status);
 873                         ha->total_io_count++;
 874                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
 875                                 break;
 876                 }
 877         }
 878
 879         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 880
 881         return IRQ_HANDLED;
 882 }
 883
 884 /**
 885  * qla4_8xxx_intr_handler - hardware interrupt handler.
 886  * @irq: Unused
 887  * @dev_id: Pointer to host adapter structure
 888  **/
 889 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
 890 {
 891         struct scsi_qla_host *ha = dev_id;
 892         uint32_t intr_status;
 893         uint32_t status;
 894         unsigned long flags = 0;
 895         uint8_t reqs_count = 0;
 896
 897         if (unlikely(pci_channel_offline(ha->pdev)))
 898                 return IRQ_HANDLED;
 899
 900         ha->isr_count++;
 901         status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
 902         if (!(status & ha->nx_legacy_intr.int_vec_bit))
 903                 return IRQ_NONE;
 904
 905         status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
 906         if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
 907                 DEBUG2(ql4_printk(KERN_INFO, ha,
 908                     "%s legacy Int not triggered\n", __func__));
 909                 return IRQ_NONE;
 910         }
 911
 912         /* clear the interrupt */
 913         qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
 914
 915         /* read twice to ensure write is flushed */
 916         qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
 917         qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
 918
 919         spin_lock_irqsave(&ha->hardware_lock, flags);
 920         while (1) {
 921                 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
 922                     ISRX_82XX_RISC_INT)) {
 923                         qla4_8xxx_spurious_interrupt(ha, reqs_count);
 924                         break;
 925                 }
 926                 intr_status =  readl(&ha->qla4_8xxx_reg->host_status);
 927                 if ((intr_status &
 928                     (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0)  {
 929                         qla4_8xxx_spurious_interrupt(ha, reqs_count);
 930                         break;
 931                 }
 932
 933                 ha->isp_ops->interrupt_service_routine(ha, intr_status);
 934
 935                 /* Enable Interrupt */
 936                 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
 937
 938                 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
 939                         break;
 940         }
 941
 942         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 943         return IRQ_HANDLED;
 944 }
 945
 946 irqreturn_t
 947 qla4_8xxx_msi_handler(int irq, void *dev_id)
 948 {
 949         struct scsi_qla_host *ha;
 950
 951         ha = (struct scsi_qla_host *) dev_id;
 952         if (!ha) {
 953                 DEBUG2(printk(KERN_INFO
 954                     "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
 955                 return IRQ_NONE;
 956         }
 957
 958         ha->isr_count++;
 959         /* clear the interrupt */
 960         qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
 961
 962         /* read twice to ensure write is flushed */
 963         qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
 964         qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
 965
 966         return qla4_8xxx_default_intr_handler(irq, dev_id);
 967 }
 968
 969 /**
 970  * qla4_8xxx_default_intr_handler - hardware interrupt handler.
 971  * @irq: Unused
 972  * @dev_id: Pointer to host adapter structure
 973  *
 974  * This interrupt handler is called directly for MSI-X, and
 975  * called indirectly for MSI.
 976  **/
 977 irqreturn_t
 978 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
 979 {
 980         struct scsi_qla_host *ha = dev_id;
 981         unsigned long   flags;
 982         uint32_t intr_status;
 983         uint8_t reqs_count = 0;
 984
 985         spin_lock_irqsave(&ha->hardware_lock, flags);
 986         while (1) {
 987                 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
 988                     ISRX_82XX_RISC_INT)) {
 989                         qla4_8xxx_spurious_interrupt(ha, reqs_count);
 990                         break;
 991                 }
 992
 993                 intr_status =  readl(&ha->qla4_8xxx_reg->host_status);
 994                 if ((intr_status &
 995                     (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
 996                         qla4_8xxx_spurious_interrupt(ha, reqs_count);
 997                         break;
 998                 }
 999
1000                 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1001
1002                 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1003                         break;
1004         }
1005
1006         ha->isr_count++;
1007         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1008         return IRQ_HANDLED;
1009 }
1010
1011 irqreturn_t
1012 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1013 {
1014         struct scsi_qla_host *ha = dev_id;
1015         unsigned long flags;
1016
1017         spin_lock_irqsave(&ha->hardware_lock, flags);
1018         qla4xxx_process_response_queue(ha);
1019         writel(0, &ha->qla4_8xxx_reg->host_int);
1020         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1021
1022         ha->isr_count++;
1023         return IRQ_HANDLED;
1024 }
1025
1026 /**
1027  * qla4xxx_process_aen - processes AENs generated by firmware
1028  * @ha: pointer to host adapter structure.
1029  * @process_aen: type of AENs to process
1030  *
1031  * Processes specific types of Asynchronous Events generated by firmware.
1032  * The type of AENs to process is specified by process_aen and can be
1033  *      PROCESS_ALL_AENS         0
1034  *      FLUSH_DDB_CHANGED_AENS   1
1035  *      RELOGIN_DDB_CHANGED_AENS 2
1036  **/
1037 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1038 {
1039         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1040         struct aen *aen;
1041         int i;
1042         unsigned long flags;
1043
1044         spin_lock_irqsave(&ha->hardware_lock, flags);
1045         while (ha->aen_out != ha->aen_in) {
1046                 aen = &ha->aen_q[ha->aen_out];
1047                 /* copy aen information to local structure */
1048                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1049                         mbox_sts[i] = aen->mbox_sts[i];
1050
1051                 ha->aen_q_count++;
1052                 ha->aen_out++;
1053
1054                 if (ha->aen_out == MAX_AEN_ENTRIES)
1055                         ha->aen_out = 0;
1056
1057                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1058
1059                 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1060                         " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1061                         (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1062                         mbox_sts[0], mbox_sts[1], mbox_sts[2],
1063                         mbox_sts[3], mbox_sts[4]));
1064
1065                 switch (mbox_sts[0]) {
1066                 case MBOX_ASTS_DATABASE_CHANGED:
1067                         switch (process_aen) {
1068                         case FLUSH_DDB_CHANGED_AENS:
1069                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1070                                               "[%d] state=%04x FLUSHED!\n",
1071                                               ha->host_no, ha->aen_out,
1072                                               mbox_sts[0], mbox_sts[2],
1073                                               mbox_sts[3]));
1074                                 break;
1075                         case PROCESS_ALL_AENS:
1076                         default:
1077                                 /* Specific device. */
1078                                 if (mbox_sts[1] == 1)
1079                                         qla4xxx_process_ddb_changed(ha,
1080                                                 mbox_sts[2], mbox_sts[3],
1081                                                 mbox_sts[4]);
1082                                 break;
1083                         }
1084                 }
1085                 spin_lock_irqsave(&ha->hardware_lock, flags);
1086         }
1087         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1088 }
1089
1090 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1091 {
1092         int ret;
1093
1094         if (!is_qla8022(ha))
1095                 goto try_intx;
1096
1097         if (ql4xenablemsix == 2)
1098                 goto try_msi;
1099
1100         if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1101                 goto try_intx;
1102
1103         /* Trying MSI-X */
1104         ret = qla4_8xxx_enable_msix(ha);
1105         if (!ret) {
1106                 DEBUG2(ql4_printk(KERN_INFO, ha,
1107                     "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1108                 goto irq_attached;
1109         }
1110
1111         ql4_printk(KERN_WARNING, ha,
1112             "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1113
1114 try_msi:
1115         /* Trying MSI */
1116         ret = pci_enable_msi(ha->pdev);
1117         if (!ret) {
1118                 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1119                         0, DRIVER_NAME, ha);
1120                 if (!ret) {
1121                         DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1122                         set_bit(AF_MSI_ENABLED, &ha->flags);
1123                         goto irq_attached;
1124                 } else {
1125                         ql4_printk(KERN_WARNING, ha,
1126                             "MSI: Failed to reserve interrupt %d "
1127                             "already in use.\n", ha->pdev->irq);
1128                         pci_disable_msi(ha->pdev);
1129                 }
1130         }
1131         ql4_printk(KERN_WARNING, ha,
1132             "MSI: Falling back-to INTx mode -- %d.\n", ret);
1133
1134 try_intx:
1135         /* Trying INTx */
1136         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1137             IRQF_SHARED, DRIVER_NAME, ha);
1138         if (!ret) {
1139                 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1140                 set_bit(AF_INTx_ENABLED, &ha->flags);
1141                 goto irq_attached;
1142
1143         } else {
1144                 ql4_printk(KERN_WARNING, ha,
1145                     "INTx: Failed to reserve interrupt %d already in"
1146                     " use.\n", ha->pdev->irq);
1147                 return ret;
1148         }
1149
1150 irq_attached:
1151         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1152         ha->host->irq = ha->pdev->irq;
1153         ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1154             __func__, ha->pdev->irq);
1155         return ret;
1156 }
1157
1158 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1159 {
1160         if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1161                 qla4_8xxx_disable_msix(ha);
1162         else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1163                 free_irq(ha->pdev->irq, ha);
1164                 pci_disable_msi(ha->pdev);
1165         } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1166                 free_irq(ha->pdev->irq, ha);
1167 }