linux/drivers/scsi/qla4xxx/ql4_isr.c
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   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 **/
  19static 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:%llu: %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:%llu: %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 */
  74static void
  75qla4xxx_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 **/
 115static 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:%llu: %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:%llu: %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:%llu: %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:%llu: 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:%llu: %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:%llu: %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:%llu: %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
 308check_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:%llu: 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:%llu: %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
 351status_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 **/
 364static 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->back_lock);
 389        task = iscsi_itt_to_task(conn, itt);
 390        spin_unlock(&conn->session->back_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
 403static 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
 423static 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 **/
 474void 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
 572exit_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
 577exit_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 **/
 587static 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
 609static 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
 638static void qla4xxx_default_router_changed(struct scsi_qla_host *ha,
 639                                           uint32_t *mbox_sts)
 640{
 641        memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[0],
 642               &mbox_sts[2], sizeof(uint32_t));
 643        memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[1],
 644               &mbox_sts[3], sizeof(uint32_t));
 645        memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[2],
 646               &mbox_sts[4], sizeof(uint32_t));
 647        memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[3],
 648               &mbox_sts[5], sizeof(uint32_t));
 649}
 650
 651/**
 652 * qla4xxx_isr_decode_mailbox - decodes mailbox status
 653 * @ha: Pointer to host adapter structure.
 654 * @mailbox_status: Mailbox status.
 655 *
 656 * This routine decodes the mailbox status during the ISR.
 657 * Hardware_lock locked upon entry. runs in interrupt context.
 658 **/
 659static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 660                                       uint32_t mbox_status)
 661{
 662        int i;
 663        uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 664        __le32 __iomem *mailbox_out;
 665        uint32_t opcode = 0;
 666
 667        if (is_qla8032(ha) || is_qla8042(ha))
 668                mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
 669        else if (is_qla8022(ha))
 670                mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
 671        else
 672                mailbox_out = &ha->reg->mailbox[0];
 673
 674        if ((mbox_status == MBOX_STS_BUSY) ||
 675            (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 676            (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 677                ha->mbox_status[0] = mbox_status;
 678
 679                if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 680                        /*
 681                         * Copy all mailbox registers to a temporary
 682                         * location and set mailbox command done flag
 683                         */
 684                        for (i = 0; i < ha->mbox_status_count; i++)
 685                                ha->mbox_status[i] = readl(&mailbox_out[i]);
 686
 687                        set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 688
 689                        if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
 690                                complete(&ha->mbx_intr_comp);
 691                }
 692        } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 693                for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 694                        mbox_sts[i] = readl(&mailbox_out[i]);
 695
 696                /* Immediately process the AENs that don't require much work.
 697                 * Only queue the database_changed AENs */
 698                if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 699                        for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 700                                ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 701                                    mbox_sts[i];
 702                        ha->aen_log.count++;
 703                }
 704                switch (mbox_status) {
 705                case MBOX_ASTS_SYSTEM_ERROR:
 706                        /* Log Mailbox registers */
 707                        ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
 708                        qla4xxx_dump_registers(ha);
 709
 710                        if ((is_qla8022(ha) && ql4xdontresethba) ||
 711                            ((is_qla8032(ha) || is_qla8042(ha)) &&
 712                             qla4_83xx_idc_dontreset(ha))) {
 713                                DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
 714                                    ha->host_no, __func__));
 715                        } else {
 716                                set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 717                                set_bit(DPC_RESET_HA, &ha->dpc_flags);
 718                        }
 719                        break;
 720
 721                case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 722                case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 723                case MBOX_ASTS_NVRAM_INVALID:
 724                case MBOX_ASTS_IP_ADDRESS_CHANGED:
 725                case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 726                        DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 727                                      "Reset HA\n", ha->host_no, mbox_status));
 728                        if (is_qla80XX(ha))
 729                                set_bit(DPC_RESET_HA_FW_CONTEXT,
 730                                        &ha->dpc_flags);
 731                        else
 732                                set_bit(DPC_RESET_HA, &ha->dpc_flags);
 733                        break;
 734
 735                case MBOX_ASTS_LINK_UP:
 736                        set_bit(AF_LINK_UP, &ha->flags);
 737                        if (test_bit(AF_INIT_DONE, &ha->flags))
 738                                set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 739
 740                        ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
 741                        qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
 742                                              sizeof(mbox_sts),
 743                                              (uint8_t *) mbox_sts);
 744
 745                        if ((is_qla8032(ha) || is_qla8042(ha)) &&
 746                            ha->notify_link_up_comp)
 747                                complete(&ha->link_up_comp);
 748
 749                        break;
 750
 751                case MBOX_ASTS_LINK_DOWN:
 752                        clear_bit(AF_LINK_UP, &ha->flags);
 753                        if (test_bit(AF_INIT_DONE, &ha->flags)) {
 754                                set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
 755                                qla4xxx_wake_dpc(ha);
 756                        }
 757
 758                        ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
 759                        qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
 760                                              sizeof(mbox_sts),
 761                                              (uint8_t *) mbox_sts);
 762                        break;
 763
 764                case MBOX_ASTS_HEARTBEAT:
 765                        ha->seconds_since_last_heartbeat = 0;
 766                        break;
 767
 768                case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 769                        DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 770                                      "ACQUIRED\n", ha->host_no, mbox_status));
 771                        set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 772                        break;
 773
 774                case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 775                case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 776                                                           * mode
 777                                                           * only */
 778                case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 779                case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 780                case MBOX_ASTS_SUBNET_STATE_CHANGE:
 781                case MBOX_ASTS_DUPLICATE_IP:
 782                        /* No action */
 783                        DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 784                                      mbox_status));
 785                        break;
 786
 787                case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 788                        printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
 789                            "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
 790                            mbox_sts[2], mbox_sts[3]);
 791
 792                        qla4xxx_update_ipaddr_state(ha, mbox_sts[5],
 793                                                    mbox_sts[3]);
 794                        /* mbox_sts[2] = Old ACB state
 795                         * mbox_sts[3] = new ACB state */
 796                        if ((mbox_sts[3] == IP_ADDRSTATE_PREFERRED) &&
 797                            ((mbox_sts[2] == IP_ADDRSTATE_TENTATIVE) ||
 798                             (mbox_sts[2] == IP_ADDRSTATE_ACQUIRING))) {
 799                                set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 800                        } else if ((mbox_sts[3] == IP_ADDRSTATE_ACQUIRING) &&
 801                                   (mbox_sts[2] == IP_ADDRSTATE_PREFERRED)) {
 802                                if (is_qla80XX(ha))
 803                                        set_bit(DPC_RESET_HA_FW_CONTEXT,
 804                                                &ha->dpc_flags);
 805                                else
 806                                        set_bit(DPC_RESET_HA, &ha->dpc_flags);
 807                        } else if (mbox_sts[3] == IP_ADDRSTATE_DISABLING) {
 808                                ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n",
 809                                           ha->host_no, __func__);
 810                        } else if (mbox_sts[3] == IP_ADDRSTATE_UNCONFIGURED) {
 811                                complete(&ha->disable_acb_comp);
 812                                ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n",
 813                                           ha->host_no, __func__);
 814                        }
 815                        break;
 816
 817                case MBOX_ASTS_IPV6_LINK_MTU_CHANGE:
 818                case MBOX_ASTS_IPV6_AUTO_PREFIX_IGNORED:
 819                case MBOX_ASTS_IPV6_ND_LOCAL_PREFIX_IGNORED:
 820                        /* No action */
 821                        DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld: AEN %04x\n",
 822                                          ha->host_no, mbox_status));
 823                        break;
 824
 825                case MBOX_ASTS_ICMPV6_ERROR_MSG_RCVD:
 826                        DEBUG2(ql4_printk(KERN_INFO, ha,
 827                                          "scsi%ld: AEN %04x, IPv6 ERROR, "
 828                                          "mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3}=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
 829                                          ha->host_no, mbox_sts[0], mbox_sts[1],
 830                                          mbox_sts[2], mbox_sts[3], mbox_sts[4],
 831                                          mbox_sts[5]));
 832                        break;
 833
 834                case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 835                case MBOX_ASTS_DNS:
 836                        /* No action */
 837                        DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 838                                      "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 839                                      ha->host_no, mbox_sts[0],
 840                                      mbox_sts[1], mbox_sts[2]));
 841                        break;
 842
 843                case MBOX_ASTS_SELF_TEST_FAILED:
 844                case MBOX_ASTS_LOGIN_FAILED:
 845                        /* No action */
 846                        DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 847                                      "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 848                                      ha->host_no, mbox_sts[0], mbox_sts[1],
 849                                      mbox_sts[2], mbox_sts[3]));
 850                        break;
 851
 852                case MBOX_ASTS_DATABASE_CHANGED:
 853                        /* Queue AEN information and process it in the DPC
 854                         * routine */
 855                        if (ha->aen_q_count > 0) {
 856
 857                                /* decrement available counter */
 858                                ha->aen_q_count--;
 859
 860                                for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 861                                        ha->aen_q[ha->aen_in].mbox_sts[i] =
 862                                            mbox_sts[i];
 863
 864                                /* print debug message */
 865                                DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
 866                                              "mb1:0x%x mb2:0x%x mb3:0x%x "
 867                                              "mb4:0x%x mb5:0x%x\n",
 868                                              ha->host_no, ha->aen_in,
 869                                              mbox_sts[0], mbox_sts[1],
 870                                              mbox_sts[2], mbox_sts[3],
 871                                              mbox_sts[4], mbox_sts[5]));
 872
 873                                /* advance pointer */
 874                                ha->aen_in++;
 875                                if (ha->aen_in == MAX_AEN_ENTRIES)
 876                                        ha->aen_in = 0;
 877
 878                                /* The DPC routine will process the aen */
 879                                set_bit(DPC_AEN, &ha->dpc_flags);
 880                        } else {
 881                                DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 882                                              "overflowed!  AEN LOST!!\n",
 883                                              ha->host_no, __func__,
 884                                              mbox_sts[0]));
 885
 886                                DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 887                                              ha->host_no));
 888
 889                                for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 890                                        DEBUG2(printk("AEN[%d] %04x %04x %04x "
 891                                                      "%04x\n", i, mbox_sts[0],
 892                                                      mbox_sts[1], mbox_sts[2],
 893                                                      mbox_sts[3]));
 894                                }
 895                        }
 896                        break;
 897
 898                case MBOX_ASTS_TXSCVR_INSERTED:
 899                        DEBUG2(printk(KERN_WARNING
 900                            "scsi%ld: AEN %04x Transceiver"
 901                            " inserted\n",  ha->host_no, mbox_sts[0]));
 902                        break;
 903
 904                case MBOX_ASTS_TXSCVR_REMOVED:
 905                        DEBUG2(printk(KERN_WARNING
 906                            "scsi%ld: AEN %04x Transceiver"
 907                            " removed\n",  ha->host_no, mbox_sts[0]));
 908                        break;
 909
 910                case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
 911                        if (is_qla8032(ha) || is_qla8042(ha)) {
 912                                DEBUG2(ql4_printk(KERN_INFO, ha,
 913                                                  "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 914                                                  ha->host_no, mbox_sts[0],
 915                                                  mbox_sts[1], mbox_sts[2],
 916                                                  mbox_sts[3], mbox_sts[4]));
 917                                opcode = mbox_sts[1] >> 16;
 918                                if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
 919                                    (opcode == MBOX_CMD_PORT_RESET)) {
 920                                        set_bit(DPC_POST_IDC_ACK,
 921                                                &ha->dpc_flags);
 922                                        ha->idc_info.request_desc = mbox_sts[1];
 923                                        ha->idc_info.info1 = mbox_sts[2];
 924                                        ha->idc_info.info2 = mbox_sts[3];
 925                                        ha->idc_info.info3 = mbox_sts[4];
 926                                        qla4xxx_wake_dpc(ha);
 927                                }
 928                        }
 929                        break;
 930
 931                case MBOX_ASTS_IDC_COMPLETE:
 932                        if (is_qla8032(ha) || is_qla8042(ha)) {
 933                                DEBUG2(ql4_printk(KERN_INFO, ha,
 934                                                  "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
 935                                                  ha->host_no, mbox_sts[0],
 936                                                  mbox_sts[1], mbox_sts[2],
 937                                                  mbox_sts[3], mbox_sts[4]));
 938                                DEBUG2(ql4_printk(KERN_INFO, ha,
 939                                                  "scsi:%ld: AEN %04x IDC Complete notification\n",
 940                                                  ha->host_no, mbox_sts[0]));
 941
 942                                opcode = mbox_sts[1] >> 16;
 943                                if (ha->notify_idc_comp)
 944                                        complete(&ha->idc_comp);
 945
 946                                if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
 947                                    (opcode == MBOX_CMD_PORT_RESET))
 948                                        ha->idc_info.info2 = mbox_sts[3];
 949
 950                                if (qla4_83xx_loopback_in_progress(ha)) {
 951                                        set_bit(AF_LOOPBACK, &ha->flags);
 952                                } else {
 953                                        clear_bit(AF_LOOPBACK, &ha->flags);
 954                                        if (ha->saved_acb)
 955                                                set_bit(DPC_RESTORE_ACB,
 956                                                        &ha->dpc_flags);
 957                                }
 958                                qla4xxx_wake_dpc(ha);
 959                        }
 960                        break;
 961
 962                case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
 963                        DEBUG2(ql4_printk(KERN_INFO, ha,
 964                                          "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",
 965                                          ha->host_no, mbox_sts[0], mbox_sts[1],
 966                                          mbox_sts[2], mbox_sts[3], mbox_sts[4],
 967                                          mbox_sts[5]));
 968                        DEBUG2(ql4_printk(KERN_INFO, ha,
 969                                          "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
 970                                          ha->host_no, mbox_sts[0]));
 971                        qla4xxx_default_router_changed(ha, mbox_sts);
 972                        break;
 973
 974                case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION:
 975                        DEBUG2(ql4_printk(KERN_INFO, ha,
 976                                          "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",
 977                                          ha->host_no, mbox_sts[0], mbox_sts[1],
 978                                          mbox_sts[2], mbox_sts[3], mbox_sts[4],
 979                                          mbox_sts[5]));
 980                        DEBUG2(ql4_printk(KERN_INFO, ha,
 981                                          "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n",
 982                                          ha->host_no, mbox_sts[0]));
 983                        /* new IDC timeout */
 984                        ha->idc_extend_tmo = mbox_sts[1];
 985                        break;
 986
 987                case MBOX_ASTS_INITIALIZATION_FAILED:
 988                        DEBUG2(ql4_printk(KERN_INFO, ha,
 989                                          "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
 990                                          ha->host_no, mbox_sts[0],
 991                                          mbox_sts[3]));
 992                        break;
 993
 994                case MBOX_ASTS_SYSTEM_WARNING_EVENT:
 995                        DEBUG2(ql4_printk(KERN_WARNING, ha,
 996                                          "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",
 997                                          ha->host_no, mbox_sts[0], mbox_sts[1],
 998                                          mbox_sts[2], mbox_sts[3], mbox_sts[4],
 999                                          mbox_sts[5]));
1000                        break;
1001
1002                case MBOX_ASTS_DCBX_CONF_CHANGE:
1003                        DEBUG2(ql4_printk(KERN_INFO, ha,
1004                                          "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",
1005                                          ha->host_no, mbox_sts[0], mbox_sts[1],
1006                                          mbox_sts[2], mbox_sts[3], mbox_sts[4],
1007                                          mbox_sts[5]));
1008                        DEBUG2(ql4_printk(KERN_INFO, ha,
1009                                          "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
1010                                          ha->host_no, mbox_sts[0]));
1011                        break;
1012
1013                default:
1014                        DEBUG2(printk(KERN_WARNING
1015                                      "scsi%ld: AEN %04x UNKNOWN\n",
1016                                      ha->host_no, mbox_sts[0]));
1017                        break;
1018                }
1019        } else {
1020                DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
1021                              ha->host_no, mbox_status));
1022
1023                ha->mbox_status[0] = mbox_status;
1024        }
1025}
1026
1027void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
1028                                         uint32_t intr_status)
1029{
1030        /* Process mailbox/asynch event interrupt.*/
1031        if (intr_status) {
1032                qla4xxx_isr_decode_mailbox(ha,
1033                                readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1034                /* clear the interrupt */
1035                writel(0, &ha->qla4_83xx_reg->risc_intr);
1036        } else {
1037                qla4xxx_process_response_queue(ha);
1038        }
1039
1040        /* clear the interrupt */
1041        writel(0, &ha->qla4_83xx_reg->mb_int_mask);
1042}
1043
1044/**
1045 * qla4_82xx_interrupt_service_routine - isr
1046 * @ha: pointer to host adapter structure.
1047 *
1048 * This is the main interrupt service routine.
1049 * hardware_lock locked upon entry. runs in interrupt context.
1050 **/
1051void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
1052    uint32_t intr_status)
1053{
1054        /* Process response queue interrupt. */
1055        if ((intr_status & HSRX_RISC_IOCB_INT) &&
1056            test_bit(AF_INIT_DONE, &ha->flags))
1057                qla4xxx_process_response_queue(ha);
1058
1059        /* Process mailbox/asynch event interrupt.*/
1060        if (intr_status & HSRX_RISC_MB_INT)
1061                qla4xxx_isr_decode_mailbox(ha,
1062                    readl(&ha->qla4_82xx_reg->mailbox_out[0]));
1063
1064        /* clear the interrupt */
1065        writel(0, &ha->qla4_82xx_reg->host_int);
1066        readl(&ha->qla4_82xx_reg->host_int);
1067}
1068
1069/**
1070 * qla4xxx_interrupt_service_routine - isr
1071 * @ha: pointer to host adapter structure.
1072 *
1073 * This is the main interrupt service routine.
1074 * hardware_lock locked upon entry. runs in interrupt context.
1075 **/
1076void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
1077                                       uint32_t intr_status)
1078{
1079        /* Process response queue interrupt. */
1080        if (intr_status & CSR_SCSI_COMPLETION_INTR)
1081                qla4xxx_process_response_queue(ha);
1082
1083        /* Process mailbox/asynch event  interrupt.*/
1084        if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
1085                qla4xxx_isr_decode_mailbox(ha,
1086                                           readl(&ha->reg->mailbox[0]));
1087
1088                /* Clear Mailbox Interrupt */
1089                writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1090                       &ha->reg->ctrl_status);
1091                readl(&ha->reg->ctrl_status);
1092        }
1093}
1094
1095/**
1096 * qla4_82xx_spurious_interrupt - processes spurious interrupt
1097 * @ha: pointer to host adapter structure.
1098 * @reqs_count: .
1099 *
1100 **/
1101static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
1102    uint8_t reqs_count)
1103{
1104        if (reqs_count)
1105                return;
1106
1107        DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
1108        if (is_qla8022(ha)) {
1109                writel(0, &ha->qla4_82xx_reg->host_int);
1110                if (!ha->pdev->msi_enabled && !ha->pdev->msix_enabled)
1111                        qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
1112                            0xfbff);
1113        }
1114        ha->spurious_int_count++;
1115}
1116
1117/**
1118 * qla4xxx_intr_handler - hardware interrupt handler.
1119 * @irq: Unused
1120 * @dev_id: Pointer to host adapter structure
1121 **/
1122irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
1123{
1124        struct scsi_qla_host *ha;
1125        uint32_t intr_status;
1126        unsigned long flags = 0;
1127        uint8_t reqs_count = 0;
1128
1129        ha = (struct scsi_qla_host *) dev_id;
1130        if (!ha) {
1131                DEBUG2(printk(KERN_INFO
1132                              "qla4xxx: Interrupt with NULL host ptr\n"));
1133                return IRQ_NONE;
1134        }
1135
1136        spin_lock_irqsave(&ha->hardware_lock, flags);
1137
1138        ha->isr_count++;
1139        /*
1140         * Repeatedly service interrupts up to a maximum of
1141         * MAX_REQS_SERVICED_PER_INTR
1142         */
1143        while (1) {
1144                /*
1145                 * Read interrupt status
1146                 */
1147                if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1148                    ha->response_out)
1149                        intr_status = CSR_SCSI_COMPLETION_INTR;
1150                else
1151                        intr_status = readl(&ha->reg->ctrl_status);
1152
1153                if ((intr_status &
1154                    (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1155                        if (reqs_count == 0)
1156                                ha->spurious_int_count++;
1157                        break;
1158                }
1159
1160                if (intr_status & CSR_FATAL_ERROR) {
1161                        DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1162                                      "Status 0x%04x\n", ha->host_no,
1163                                      readl(isp_port_error_status (ha))));
1164
1165                        /* Issue Soft Reset to clear this error condition.
1166                         * This will prevent the RISC from repeatedly
1167                         * interrupting the driver; thus, allowing the DPC to
1168                         * get scheduled to continue error recovery.
1169                         * NOTE: Disabling RISC interrupts does not work in
1170                         * this case, as CSR_FATAL_ERROR overrides
1171                         * CSR_SCSI_INTR_ENABLE */
1172                        if ((readl(&ha->reg->ctrl_status) &
1173                             CSR_SCSI_RESET_INTR) == 0) {
1174                                writel(set_rmask(CSR_SOFT_RESET),
1175                                       &ha->reg->ctrl_status);
1176                                readl(&ha->reg->ctrl_status);
1177                        }
1178
1179                        writel(set_rmask(CSR_FATAL_ERROR),
1180                               &ha->reg->ctrl_status);
1181                        readl(&ha->reg->ctrl_status);
1182
1183                        __qla4xxx_disable_intrs(ha);
1184
1185                        set_bit(DPC_RESET_HA, &ha->dpc_flags);
1186
1187                        break;
1188                } else if (intr_status & CSR_SCSI_RESET_INTR) {
1189                        clear_bit(AF_ONLINE, &ha->flags);
1190                        __qla4xxx_disable_intrs(ha);
1191
1192                        writel(set_rmask(CSR_SCSI_RESET_INTR),
1193                               &ha->reg->ctrl_status);
1194                        readl(&ha->reg->ctrl_status);
1195
1196                        if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1197                                set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1198
1199                        break;
1200                } else if (intr_status & INTR_PENDING) {
1201                        ha->isp_ops->interrupt_service_routine(ha, intr_status);
1202                        ha->total_io_count++;
1203                        if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1204                                break;
1205                }
1206        }
1207
1208        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1209
1210        return IRQ_HANDLED;
1211}
1212
1213/**
1214 * qla4_82xx_intr_handler - hardware interrupt handler.
1215 * @irq: Unused
1216 * @dev_id: Pointer to host adapter structure
1217 **/
1218irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1219{
1220        struct scsi_qla_host *ha = dev_id;
1221        uint32_t intr_status;
1222        uint32_t status;
1223        unsigned long flags = 0;
1224        uint8_t reqs_count = 0;
1225
1226        if (unlikely(pci_channel_offline(ha->pdev)))
1227                return IRQ_HANDLED;
1228
1229        ha->isr_count++;
1230        status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1231        if (!(status & ha->nx_legacy_intr.int_vec_bit))
1232                return IRQ_NONE;
1233
1234        status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1235        if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1236                DEBUG7(ql4_printk(KERN_INFO, ha,
1237                                  "%s legacy Int not triggered\n", __func__));
1238                return IRQ_NONE;
1239        }
1240
1241        /* clear the interrupt */
1242        qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1243
1244        /* read twice to ensure write is flushed */
1245        qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1246        qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1247
1248        spin_lock_irqsave(&ha->hardware_lock, flags);
1249        while (1) {
1250                if (!(readl(&ha->qla4_82xx_reg->host_int) &
1251                    ISRX_82XX_RISC_INT)) {
1252                        qla4_82xx_spurious_interrupt(ha, reqs_count);
1253                        break;
1254                }
1255                intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1256                if ((intr_status &
1257                    (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0)  {
1258                        qla4_82xx_spurious_interrupt(ha, reqs_count);
1259                        break;
1260                }
1261
1262                ha->isp_ops->interrupt_service_routine(ha, intr_status);
1263
1264                /* Enable Interrupt */
1265                qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1266
1267                if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1268                        break;
1269        }
1270
1271        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1272        return IRQ_HANDLED;
1273}
1274
1275#define LEG_INT_PTR_B31         (1 << 31)
1276#define LEG_INT_PTR_B30         (1 << 30)
1277#define PF_BITS_MASK            (0xF << 16)
1278
1279/**
1280 * qla4_83xx_intr_handler - hardware interrupt handler.
1281 * @irq: Unused
1282 * @dev_id: Pointer to host adapter structure
1283 **/
1284irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1285{
1286        struct scsi_qla_host *ha = dev_id;
1287        uint32_t leg_int_ptr = 0;
1288        unsigned long flags = 0;
1289
1290        ha->isr_count++;
1291        leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1292
1293        /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1294        if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1295                DEBUG7(ql4_printk(KERN_ERR, ha,
1296                                  "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1297                                  __func__));
1298                return IRQ_NONE;
1299        }
1300
1301        /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1302        if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1303                DEBUG7(ql4_printk(KERN_ERR, ha,
1304                                  "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1305                                  __func__, (leg_int_ptr & PF_BITS_MASK),
1306                                  ha->pf_bit));
1307                return IRQ_NONE;
1308        }
1309
1310        /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1311         * Control register and poll till Legacy Interrupt Pointer register
1312         * bit30 is 0.
1313         */
1314        writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1315        do {
1316                leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1317                if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1318                        break;
1319        } while (leg_int_ptr & LEG_INT_PTR_B30);
1320
1321        spin_lock_irqsave(&ha->hardware_lock, flags);
1322        leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1323        ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1324        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1325
1326        return IRQ_HANDLED;
1327}
1328
1329irqreturn_t
1330qla4_8xxx_msi_handler(int irq, void *dev_id)
1331{
1332        struct scsi_qla_host *ha;
1333
1334        ha = (struct scsi_qla_host *) dev_id;
1335        if (!ha) {
1336                DEBUG2(printk(KERN_INFO
1337                    "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1338                return IRQ_NONE;
1339        }
1340
1341        ha->isr_count++;
1342        /* clear the interrupt */
1343        qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1344
1345        /* read twice to ensure write is flushed */
1346        qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1347        qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1348
1349        return qla4_8xxx_default_intr_handler(irq, dev_id);
1350}
1351
1352static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1353{
1354        struct scsi_qla_host *ha = dev_id;
1355        unsigned long flags;
1356        uint32_t ival = 0;
1357
1358        spin_lock_irqsave(&ha->hardware_lock, flags);
1359
1360        ival = readl(&ha->qla4_83xx_reg->risc_intr);
1361        if (ival == 0) {
1362                ql4_printk(KERN_INFO, ha,
1363                           "%s: It is a spurious mailbox interrupt!\n",
1364                           __func__);
1365                ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1366                ival &= ~INT_MASK_FW_MB;
1367                writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1368                goto exit;
1369        }
1370
1371        qla4xxx_isr_decode_mailbox(ha,
1372                                   readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1373        writel(0, &ha->qla4_83xx_reg->risc_intr);
1374        ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1375        ival &= ~INT_MASK_FW_MB;
1376        writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1377        ha->isr_count++;
1378exit:
1379        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1380        return IRQ_HANDLED;
1381}
1382
1383/**
1384 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1385 * @irq: Unused
1386 * @dev_id: Pointer to host adapter structure
1387 *
1388 * This interrupt handler is called directly for MSI-X, and
1389 * called indirectly for MSI.
1390 **/
1391irqreturn_t
1392qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1393{
1394        struct scsi_qla_host *ha = dev_id;
1395        unsigned long   flags;
1396        uint32_t intr_status;
1397        uint8_t reqs_count = 0;
1398
1399        if (is_qla8032(ha) || is_qla8042(ha)) {
1400                qla4_83xx_mailbox_intr_handler(irq, dev_id);
1401        } else {
1402                spin_lock_irqsave(&ha->hardware_lock, flags);
1403                while (1) {
1404                        if (!(readl(&ha->qla4_82xx_reg->host_int) &
1405                            ISRX_82XX_RISC_INT)) {
1406                                qla4_82xx_spurious_interrupt(ha, reqs_count);
1407                                break;
1408                        }
1409
1410                        intr_status =  readl(&ha->qla4_82xx_reg->host_status);
1411                        if ((intr_status &
1412                            (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1413                                qla4_82xx_spurious_interrupt(ha, reqs_count);
1414                                break;
1415                        }
1416
1417                        ha->isp_ops->interrupt_service_routine(ha, intr_status);
1418
1419                        if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1420                                break;
1421                }
1422                ha->isr_count++;
1423                spin_unlock_irqrestore(&ha->hardware_lock, flags);
1424        }
1425        return IRQ_HANDLED;
1426}
1427
1428irqreturn_t
1429qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1430{
1431        struct scsi_qla_host *ha = dev_id;
1432        unsigned long flags;
1433        int intr_status;
1434        uint32_t ival = 0;
1435
1436        spin_lock_irqsave(&ha->hardware_lock, flags);
1437        if (is_qla8032(ha) || is_qla8042(ha)) {
1438                ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1439                if (ival == 0) {
1440                        ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1441                                   __func__);
1442                        goto exit_msix_rsp_q;
1443                }
1444                qla4xxx_process_response_queue(ha);
1445                writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1446        } else {
1447                intr_status = readl(&ha->qla4_82xx_reg->host_status);
1448                if (intr_status & HSRX_RISC_IOCB_INT) {
1449                        qla4xxx_process_response_queue(ha);
1450                        writel(0, &ha->qla4_82xx_reg->host_int);
1451                } else {
1452                        ql4_printk(KERN_INFO, ha, "%s: spurious iocb interrupt...\n",
1453                                   __func__);
1454                        goto exit_msix_rsp_q;
1455                }
1456        }
1457        ha->isr_count++;
1458exit_msix_rsp_q:
1459        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1460        return IRQ_HANDLED;
1461}
1462
1463/**
1464 * qla4xxx_process_aen - processes AENs generated by firmware
1465 * @ha: pointer to host adapter structure.
1466 * @process_aen: type of AENs to process
1467 *
1468 * Processes specific types of Asynchronous Events generated by firmware.
1469 * The type of AENs to process is specified by process_aen and can be
1470 *      PROCESS_ALL_AENS         0
1471 *      FLUSH_DDB_CHANGED_AENS   1
1472 *      RELOGIN_DDB_CHANGED_AENS 2
1473 **/
1474void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1475{
1476        uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1477        struct aen *aen;
1478        int i;
1479        unsigned long flags;
1480
1481        spin_lock_irqsave(&ha->hardware_lock, flags);
1482        while (ha->aen_out != ha->aen_in) {
1483                aen = &ha->aen_q[ha->aen_out];
1484                /* copy aen information to local structure */
1485                for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1486                        mbox_sts[i] = aen->mbox_sts[i];
1487
1488                ha->aen_q_count++;
1489                ha->aen_out++;
1490
1491                if (ha->aen_out == MAX_AEN_ENTRIES)
1492                        ha->aen_out = 0;
1493
1494                spin_unlock_irqrestore(&ha->hardware_lock, flags);
1495
1496                DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1497                        " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1498                        (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1499                        mbox_sts[0], mbox_sts[1], mbox_sts[2],
1500                        mbox_sts[3], mbox_sts[4]));
1501
1502                switch (mbox_sts[0]) {
1503                case MBOX_ASTS_DATABASE_CHANGED:
1504                        switch (process_aen) {
1505                        case FLUSH_DDB_CHANGED_AENS:
1506                                DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1507                                              "[%d] state=%04x FLUSHED!\n",
1508                                              ha->host_no, ha->aen_out,
1509                                              mbox_sts[0], mbox_sts[2],
1510                                              mbox_sts[3]));
1511                                break;
1512                        case PROCESS_ALL_AENS:
1513                        default:
1514                                /* Specific device. */
1515                                if (mbox_sts[1] == 1)
1516                                        qla4xxx_process_ddb_changed(ha,
1517                                                mbox_sts[2], mbox_sts[3],
1518                                                mbox_sts[4]);
1519                                break;
1520                        }
1521                }
1522                spin_lock_irqsave(&ha->hardware_lock, flags);
1523        }
1524        spin_unlock_irqrestore(&ha->hardware_lock, flags);
1525}
1526
1527int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1528{
1529        int ret = 0;
1530        int rval = QLA_ERROR;
1531
1532        if (is_qla40XX(ha))
1533                goto try_intx;
1534
1535        if (ql4xenablemsix == 2) {
1536                /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */
1537                if (is_qla8032(ha) || is_qla8042(ha)) {
1538                        ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n",
1539                                   __func__, ha->pdev->device);
1540                        goto try_intx;
1541                }
1542                goto try_msi;
1543        }
1544
1545        if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1546                goto try_intx;
1547
1548        /* Trying MSI-X */
1549        ret = qla4_8xxx_enable_msix(ha);
1550        if (!ret) {
1551                DEBUG2(ql4_printk(KERN_INFO, ha,
1552                    "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1553                goto irq_attached;
1554        } else {
1555                if (is_qla8032(ha) || is_qla8042(ha)) {
1556                        ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n",
1557                                   __func__, ha->pdev->device, ret);
1558                        goto try_intx;
1559                }
1560        }
1561
1562        ql4_printk(KERN_WARNING, ha,
1563            "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1564
1565try_msi:
1566        /* Trying MSI */
1567        ret = pci_alloc_irq_vectors(ha->pdev, 1, 1, PCI_IRQ_MSI);
1568        if (ret > 0) {
1569                ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1570                        0, DRIVER_NAME, ha);
1571                if (!ret) {
1572                        DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1573                        goto irq_attached;
1574                } else {
1575                        ql4_printk(KERN_WARNING, ha,
1576                            "MSI: Failed to reserve interrupt %d "
1577                            "already in use.\n", ha->pdev->irq);
1578                        pci_free_irq_vectors(ha->pdev);
1579                }
1580        }
1581
1582try_intx:
1583        if (is_qla8022(ha)) {
1584                ql4_printk(KERN_WARNING, ha, "%s: ISP82xx Legacy interrupt not supported\n",
1585                           __func__);
1586                goto irq_not_attached;
1587        }
1588
1589        /* Trying INTx */
1590        ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1591            IRQF_SHARED, DRIVER_NAME, ha);
1592        if (!ret) {
1593                DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1594                goto irq_attached;
1595
1596        } else {
1597                ql4_printk(KERN_WARNING, ha,
1598                    "INTx: Failed to reserve interrupt %d already in"
1599                    " use.\n", ha->pdev->irq);
1600                goto irq_not_attached;
1601        }
1602
1603irq_attached:
1604        set_bit(AF_IRQ_ATTACHED, &ha->flags);
1605        ha->host->irq = ha->pdev->irq;
1606        ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1607                   __func__, ha->pdev->irq);
1608        rval = QLA_SUCCESS;
1609irq_not_attached:
1610        return rval;
1611}
1612
1613void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1614{
1615        if (!test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1616                return;
1617
1618        if (ha->pdev->msix_enabled)
1619                free_irq(pci_irq_vector(ha->pdev, 1), ha);
1620        free_irq(pci_irq_vector(ha->pdev, 0), ha);
1621        pci_free_irq_vectors(ha->pdev);
1622}
1623