drivers/scsi/qla4xxx/ql4_isr.c

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2006 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  * qla2x00_process_completed_request() - Process a Fast Post response.
  15  * @ha: SCSI driver HA context
  16  * @index: SRB index
  17  **/
  18 static void qla4xxx_process_completed_request(struct scsi_qla_host *ha,
  19                                               uint32_t index)
  20 {
  21         struct srb *srb;
  22
  23         srb = qla4xxx_del_from_active_array(ha, index);
  24         if (srb) {
  25                 /* Save ISP completion status */
  26                 srb->cmd->result = DID_OK << 16;
  27                 qla4xxx_srb_compl(ha, srb);
  28         } else {
  29                 DEBUG2(printk("scsi%ld: Invalid ISP SCSI completion handle = "
  30                               "%d\n", ha->host_no, index));
  31                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
  32         }
  33 }
  34
  35 /**
  36  * qla4xxx_status_entry - processes status IOCBs
  37  * @ha: Pointer to host adapter structure.
  38  * @sts_entry: Pointer to status entry structure.
  39  **/
  40 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
  41                                  struct status_entry *sts_entry)
  42 {
  43         uint8_t scsi_status;
  44         struct scsi_cmnd *cmd;
  45         struct srb *srb;
  46         struct ddb_entry *ddb_entry;
  47         uint32_t residual;
  48         uint16_t sensebytecnt;
  49
  50         if (sts_entry->completionStatus == SCS_COMPLETE &&
  51             sts_entry->scsiStatus == 0) {
  52                 qla4xxx_process_completed_request(ha,
  53                                                   le32_to_cpu(sts_entry->
  54                                                               handle));
  55                 return;
  56         }
  57
  58         srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
  59         if (!srb) {
  60                 /* FIXMEdg: Don't we need to reset ISP in this case??? */
  61                 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
  62                               "handle 0x%x, sp=%p. This cmd may have already "
  63                               "been completed.\n", ha->host_no, __func__,
  64                               le32_to_cpu(sts_entry->handle), srb));
  65                 return;
  66         }
  67
  68         cmd = srb->cmd;
  69         if (cmd == NULL) {
  70                 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
  71                               "OS pkt->handle=%d srb=%p srb->state:%d\n",
  72                               ha->host_no, __func__, sts_entry->handle,
  73                               srb, srb->state));
  74                 dev_warn(&ha->pdev->dev, "Command is NULL:"
  75                         " already returned to OS (srb=%p)\n", srb);
  76                 return;
  77         }
  78
  79         ddb_entry = srb->ddb;
  80         if (ddb_entry == NULL) {
  81                 cmd->result = DID_NO_CONNECT << 16;
  82                 goto status_entry_exit;
  83         }
  84
  85         residual = le32_to_cpu(sts_entry->residualByteCnt);
  86
  87         /* Translate ISP error to a Linux SCSI error. */
  88         scsi_status = sts_entry->scsiStatus;
  89         switch (sts_entry->completionStatus) {
  90         case SCS_COMPLETE:
  91                 if (scsi_status == 0) {
  92                         cmd->result = DID_OK << 16;
  93                         break;
  94                 }
  95
  96                 if (sts_entry->iscsiFlags &
  97                     (ISCSI_FLAG_RESIDUAL_OVER|ISCSI_FLAG_RESIDUAL_UNDER))
  98                         scsi_set_resid(cmd, residual);
  99
 100                 cmd->result = DID_OK << 16 | scsi_status;
 101
 102                 if (scsi_status != SCSI_CHECK_CONDITION)
 103                         break;
 104
 105                 /* Copy Sense Data into sense buffer. */
 106                 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
 107
 108                 sensebytecnt = le16_to_cpu(sts_entry->senseDataByteCnt);
 109                 if (sensebytecnt == 0)
 110                         break;
 111
 112                 memcpy(cmd->sense_buffer, sts_entry->senseData,
 113                        min(sensebytecnt,
 114                            (uint16_t) sizeof(cmd->sense_buffer)));
 115
 116                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
 117                               "ASC/ASCQ = %02x/%02x\n", ha->host_no,
 118                               cmd->device->channel, cmd->device->id,
 119                               cmd->device->lun, __func__,
 120                               sts_entry->senseData[2] & 0x0f,
 121                               sts_entry->senseData[12],
 122                               sts_entry->senseData[13]));
 123
 124                 srb->flags |= SRB_GOT_SENSE;
 125                 break;
 126
 127         case SCS_INCOMPLETE:
 128                 /* Always set the status to DID_ERROR, since
 129                  * all conditions result in that status anyway */
 130                 cmd->result = DID_ERROR << 16;
 131                 break;
 132
 133         case SCS_RESET_OCCURRED:
 134                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
 135                               ha->host_no, cmd->device->channel,
 136                               cmd->device->id, cmd->device->lun, __func__));
 137
 138                 cmd->result = DID_RESET << 16;
 139                 break;
 140
 141         case SCS_ABORTED:
 142                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
 143                               ha->host_no, cmd->device->channel,
 144                               cmd->device->id, cmd->device->lun, __func__));
 145
 146                 cmd->result = DID_RESET << 16;
 147                 break;
 148
 149         case SCS_TIMEOUT:
 150                 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
 151                               ha->host_no, cmd->device->channel,
 152                               cmd->device->id, cmd->device->lun));
 153
 154                 cmd->result = DID_BUS_BUSY << 16;
 155
 156                 /*
 157                  * Mark device missing so that we won't continue to send
 158                  * I/O to this device.  We should get a ddb state change
 159                  * AEN soon.
 160                  */
 161                 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
 162                         qla4xxx_mark_device_missing(ha, ddb_entry);
 163                 break;
 164
 165         case SCS_DATA_UNDERRUN:
 166         case SCS_DATA_OVERRUN:
 167                 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
 168                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, "
 169                                       "residual = 0x%x\n", ha->host_no,
 170                                       cmd->device->channel, cmd->device->id,
 171                                       cmd->device->lun, __func__, residual));
 172
 173                         cmd->result = DID_ERROR << 16;
 174                         break;
 175                 }
 176
 177                 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
 178                         /*
 179                          * Firmware detected a SCSI transport underrun
 180                          * condition
 181                          */
 182                         scsi_set_resid(cmd, residual);
 183                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: UNDERRUN status "
 184                                       "detected, xferlen = 0x%x, residual = "
 185                                       "0x%x\n",
 186                                       ha->host_no, cmd->device->channel,
 187                                       cmd->device->id,
 188                                       cmd->device->lun, __func__,
 189                                       scsi_bufflen(cmd),
 190                                       residual));
 191                 }
 192
 193                 /*
 194                  * If there is scsi_status, it takes precedense over
 195                  * underflow condition.
 196                  */
 197                 if (scsi_status != 0) {
 198                         cmd->result = DID_OK << 16 | scsi_status;
 199
 200                         if (scsi_status != SCSI_CHECK_CONDITION)
 201                                 break;
 202
 203                         /* Copy Sense Data into sense buffer. */
 204                         memset(cmd->sense_buffer, 0,
 205                                sizeof(cmd->sense_buffer));
 206
 207                         sensebytecnt =
 208                                 le16_to_cpu(sts_entry->senseDataByteCnt);
 209                         if (sensebytecnt == 0)
 210                                 break;
 211
 212                         memcpy(cmd->sense_buffer, sts_entry->senseData,
 213                                min(sensebytecnt,
 214                                    (uint16_t) sizeof(cmd->sense_buffer)));
 215
 216                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
 217                                       "ASC/ASCQ = %02x/%02x\n", ha->host_no,
 218                                       cmd->device->channel, cmd->device->id,
 219                                       cmd->device->lun, __func__,
 220                                       sts_entry->senseData[2] & 0x0f,
 221                                       sts_entry->senseData[12],
 222                                       sts_entry->senseData[13]));
 223                 } else {
 224                         /*
 225                          * If RISC reports underrun and target does not
 226                          * report it then we must have a lost frame, so
 227                          * tell upper layer to retry it by reporting a
 228                          * bus busy.
 229                          */
 230                         if ((sts_entry->iscsiFlags &
 231                              ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
 232                                 cmd->result = DID_BUS_BUSY << 16;
 233                         } else if ((scsi_bufflen(cmd) - residual) <
 234                                    cmd->underflow) {
 235                                 /*
 236                                  * Handle mid-layer underflow???
 237                                  *
 238                                  * For kernels less than 2.4, the driver must
 239                                  * return an error if an underflow is detected.
 240                                  * For kernels equal-to and above 2.4, the
 241                                  * mid-layer will appearantly handle the
 242                                  * underflow by detecting the residual count --
 243                                  * unfortunately, we do not see where this is
 244                                  * actually being done.  In the interim, we
 245                                  * will return DID_ERROR.
 246                                  */
 247                                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
 248                                               "Mid-layer Data underrun, "
 249                                               "xferlen = 0x%x, "
 250                                               "residual = 0x%x\n", ha->host_no,
 251                                               cmd->device->channel,
 252                                               cmd->device->id,
 253                                               cmd->device->lun, __func__,
 254                                               scsi_bufflen(cmd), residual));
 255
 256                                 cmd->result = DID_ERROR << 16;
 257                         } else {
 258                                 cmd->result = DID_OK << 16;
 259                         }
 260                 }
 261                 break;
 262
 263         case SCS_DEVICE_LOGGED_OUT:
 264         case SCS_DEVICE_UNAVAILABLE:
 265                 /*
 266                  * Mark device missing so that we won't continue to
 267                  * send I/O to this device.  We should get a ddb
 268                  * state change AEN soon.
 269                  */
 270                 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
 271                         qla4xxx_mark_device_missing(ha, ddb_entry);
 272
 273                 cmd->result = DID_BUS_BUSY << 16;
 274                 break;
 275
 276         case SCS_QUEUE_FULL:
 277                 /*
 278                  * SCSI Mid-Layer handles device queue full
 279                  */
 280                 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
 281                 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
 282                               "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
 283                               " iResp=%02x\n", ha->host_no, cmd->device->id,
 284                               cmd->device->lun, __func__,
 285                               sts_entry->completionStatus,
 286                               sts_entry->scsiStatus, sts_entry->state_flags,
 287                               sts_entry->iscsiFlags,
 288                               sts_entry->iscsiResponse));
 289                 break;
 290
 291         default:
 292                 cmd->result = DID_ERROR << 16;
 293                 break;
 294         }
 295
 296 status_entry_exit:
 297
 298         /* complete the request */
 299         srb->cc_stat = sts_entry->completionStatus;
 300         qla4xxx_srb_compl(ha, srb);
 301 }
 302
 303 /**
 304  * qla4xxx_process_response_queue - process response queue completions
 305  * @ha: Pointer to host adapter structure.
 306  *
 307  * This routine process response queue completions in interrupt context.
 308  * Hardware_lock locked upon entry
 309  **/
 310 static void qla4xxx_process_response_queue(struct scsi_qla_host * ha)
 311 {
 312         uint32_t count = 0;
 313         struct srb *srb = NULL;
 314         struct status_entry *sts_entry;
 315
 316         /* Process all responses from response queue */
 317         while ((ha->response_in =
 318                 (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) !=
 319                ha->response_out) {
 320                 sts_entry = (struct status_entry *) ha->response_ptr;
 321                 count++;
 322
 323                 /* Advance pointers for next entry */
 324                 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
 325                         ha->response_out = 0;
 326                         ha->response_ptr = ha->response_ring;
 327                 } else {
 328                         ha->response_out++;
 329                         ha->response_ptr++;
 330                 }
 331
 332                 /* process entry */
 333                 switch (sts_entry->hdr.entryType) {
 334                 case ET_STATUS:
 335                         /*
 336                          * Common status - Single completion posted in single
 337                          * IOSB.
 338                          */
 339                         qla4xxx_status_entry(ha, sts_entry);
 340                         break;
 341
 342                 case ET_PASSTHRU_STATUS:
 343                         break;
 344
 345                 case ET_STATUS_CONTINUATION:
 346                         /* Just throw away the status continuation entries */
 347                         DEBUG2(printk("scsi%ld: %s: Status Continuation entry "
 348                                       "- ignoring\n", ha->host_no, __func__));
 349                         break;
 350
 351                 case ET_COMMAND:
 352                         /* ISP device queue is full. Command not
 353                          * accepted by ISP.  Queue command for
 354                          * later */
 355
 356                         srb = qla4xxx_del_from_active_array(ha,
 357                                                     le32_to_cpu(sts_entry->
 358                                                                 handle));
 359                         if (srb == NULL)
 360                                 goto exit_prq_invalid_handle;
 361
 362                         DEBUG2(printk("scsi%ld: %s: FW device queue full, "
 363                                       "srb %p\n", ha->host_no, __func__, srb));
 364
 365                         /* ETRY normally by sending it back with
 366                          * DID_BUS_BUSY */
 367                         srb->cmd->result = DID_BUS_BUSY << 16;
 368                         qla4xxx_srb_compl(ha, srb);
 369                         break;
 370
 371                 case ET_CONTINUE:
 372                         /* Just throw away the continuation entries */
 373                         DEBUG2(printk("scsi%ld: %s: Continuation entry - "
 374                                       "ignoring\n", ha->host_no, __func__));
 375                         break;
 376
 377                 default:
 378                         /*
 379                          * Invalid entry in response queue, reset RISC
 380                          * firmware.
 381                          */
 382                         DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
 383                                       "response queue \n", ha->host_no,
 384                                       __func__,
 385                                       sts_entry->hdr.entryType));
 386                         goto exit_prq_error;
 387                 }
 388         }
 389
 390         /*
 391          * Done with responses, update the ISP For QLA4010, this also clears
 392          * the interrupt.
 393          */
 394         writel(ha->response_out, &ha->reg->rsp_q_out);
 395         readl(&ha->reg->rsp_q_out);
 396
 397         return;
 398
 399 exit_prq_invalid_handle:
 400         DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
 401                       ha->host_no, __func__, srb, sts_entry->hdr.entryType,
 402                       sts_entry->completionStatus));
 403
 404 exit_prq_error:
 405         writel(ha->response_out, &ha->reg->rsp_q_out);
 406         readl(&ha->reg->rsp_q_out);
 407
 408         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 409 }
 410
 411 /**
 412  * qla4xxx_isr_decode_mailbox - decodes mailbox status
 413  * @ha: Pointer to host adapter structure.
 414  * @mailbox_status: Mailbox status.
 415  *
 416  * This routine decodes the mailbox status during the ISR.
 417  * Hardware_lock locked upon entry. runs in interrupt context.
 418  **/
 419 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 420                                        uint32_t mbox_status)
 421 {
 422         int i;
 423         uint32_t mbox_stat2, mbox_stat3;
 424
 425         if ((mbox_status == MBOX_STS_BUSY) ||
 426             (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 427             (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 428                 ha->mbox_status[0] = mbox_status;
 429
 430                 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 431                         /*
 432                          * Copy all mailbox registers to a temporary
 433                          * location and set mailbox command done flag
 434                          */
 435                         for (i = 1; i < ha->mbox_status_count; i++)
 436                                 ha->mbox_status[i] =
 437                                         readl(&ha->reg->mailbox[i]);
 438
 439                         set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 440                 }
 441         } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 442                 /* Immediately process the AENs that don't require much work.
 443                  * Only queue the database_changed AENs */
 444                 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 445                         for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 446                                 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 447                                         readl(&ha->reg->mailbox[i]);
 448                         ha->aen_log.count++;
 449                 }
 450                 switch (mbox_status) {
 451                 case MBOX_ASTS_SYSTEM_ERROR:
 452                         /* Log Mailbox registers */
 453                         if (ql4xdontresethba) {
 454                                 DEBUG2(printk("%s:Dont Reset HBA\n",
 455                                               __func__));
 456                         } else {
 457                                 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 458                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 459                         }
 460                         break;
 461
 462                 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 463                 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 464                 case MBOX_ASTS_NVRAM_INVALID:
 465                 case MBOX_ASTS_IP_ADDRESS_CHANGED:
 466                 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 467                         DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 468                                       "Reset HA\n", ha->host_no, mbox_status));
 469                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 470                         break;
 471
 472                 case MBOX_ASTS_LINK_UP:
 473                         DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK UP\n",
 474                                       ha->host_no, mbox_status));
 475                         set_bit(AF_LINK_UP, &ha->flags);
 476                         break;
 477
 478                 case MBOX_ASTS_LINK_DOWN:
 479                         DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK DOWN\n",
 480                                       ha->host_no, mbox_status));
 481                         clear_bit(AF_LINK_UP, &ha->flags);
 482                         break;
 483
 484                 case MBOX_ASTS_HEARTBEAT:
 485                         ha->seconds_since_last_heartbeat = 0;
 486                         break;
 487
 488                 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 489                         DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 490                                       "ACQUIRED\n", ha->host_no, mbox_status));
 491                         set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 492                         break;
 493
 494                 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 495                 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 496                                                            * mode
 497                                                            * only */
 498                 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 499                 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 500                 case MBOX_ASTS_SUBNET_STATE_CHANGE:
 501                         /* No action */
 502                         DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 503                                       mbox_status));
 504                         break;
 505
 506                 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 507                         mbox_stat2 = readl(&ha->reg->mailbox[2]);
 508                         mbox_stat3 = readl(&ha->reg->mailbox[3]);
 509
 510                         if ((mbox_stat3 == 5) && (mbox_stat2 == 3))
 511                                 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 512                         else if ((mbox_stat3 == 2) && (mbox_stat2 == 5))
 513                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 514                         break;
 515
 516                 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 517                 case MBOX_ASTS_DNS:
 518                         /* No action */
 519                         DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 520                                       "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 521                                       ha->host_no, mbox_status,
 522                                       readl(&ha->reg->mailbox[1]),
 523                                       readl(&ha->reg->mailbox[2])));
 524                         break;
 525
 526                 case MBOX_ASTS_SELF_TEST_FAILED:
 527                 case MBOX_ASTS_LOGIN_FAILED:
 528                         /* No action */
 529                         DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 530                                       "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 531                                       ha->host_no, mbox_status,
 532                                       readl(&ha->reg->mailbox[1]),
 533                                       readl(&ha->reg->mailbox[2]),
 534                                       readl(&ha->reg->mailbox[3])));
 535                         break;
 536
 537                 case MBOX_ASTS_DATABASE_CHANGED:
 538                         /* Queue AEN information and process it in the DPC
 539                          * routine */
 540                         if (ha->aen_q_count > 0) {
 541
 542                                 /* decrement available counter */
 543                                 ha->aen_q_count--;
 544
 545                                 for (i = 1; i < MBOX_AEN_REG_COUNT; i++)
 546                                         ha->aen_q[ha->aen_in].mbox_sts[i] =
 547                                                 readl(&ha->reg->mailbox[i]);
 548
 549                                 ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status;
 550
 551                                 /* print debug message */
 552                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
 553                                               " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
 554                                               ha->host_no, ha->aen_in,
 555                                               mbox_status,
 556                                               ha->aen_q[ha->aen_in].mbox_sts[1],
 557                                               ha->aen_q[ha->aen_in].mbox_sts[2],
 558                                               ha->aen_q[ha->aen_in].mbox_sts[3],
 559                                               ha->aen_q[ha->aen_in].  mbox_sts[4]));
 560                                 /* advance pointer */
 561                                 ha->aen_in++;
 562                                 if (ha->aen_in == MAX_AEN_ENTRIES)
 563                                         ha->aen_in = 0;
 564
 565                                 /* The DPC routine will process the aen */
 566                                 set_bit(DPC_AEN, &ha->dpc_flags);
 567                         } else {
 568                                 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 569                                               "overflowed!  AEN LOST!!\n",
 570                                               ha->host_no, __func__,
 571                                               mbox_status));
 572
 573                                 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 574                                               ha->host_no));
 575
 576                                 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 577                                         DEBUG2(printk("AEN[%d] %04x %04x %04x "
 578                                                       "%04x\n", i,
 579                                                       ha->aen_q[i].mbox_sts[0],
 580                                                       ha->aen_q[i].mbox_sts[1],
 581                                                       ha->aen_q[i].mbox_sts[2],
 582                                                       ha->aen_q[i].mbox_sts[3]));
 583                                 }
 584                         }
 585                         break;
 586
 587                 default:
 588                         DEBUG2(printk(KERN_WARNING
 589                                       "scsi%ld: AEN %04x UNKNOWN\n",
 590                                       ha->host_no, mbox_status));
 591                         break;
 592                 }
 593         } else {
 594                 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
 595                               ha->host_no, mbox_status));
 596
 597                 ha->mbox_status[0] = mbox_status;
 598         }
 599 }
 600
 601 /**
 602  * qla4xxx_interrupt_service_routine - isr
 603  * @ha: pointer to host adapter structure.
 604  *
 605  * This is the main interrupt service routine.
 606  * hardware_lock locked upon entry. runs in interrupt context.
 607  **/
 608 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
 609                                        uint32_t intr_status)
 610 {
 611         /* Process response queue interrupt. */
 612         if (intr_status & CSR_SCSI_COMPLETION_INTR)
 613                 qla4xxx_process_response_queue(ha);
 614
 615         /* Process mailbox/asynch event  interrupt.*/
 616         if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
 617                 qla4xxx_isr_decode_mailbox(ha,
 618                                            readl(&ha->reg->mailbox[0]));
 619
 620                 /* Clear Mailbox Interrupt */
 621                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
 622                        &ha->reg->ctrl_status);
 623                 readl(&ha->reg->ctrl_status);
 624         }
 625 }
 626
 627 /**
 628  * qla4xxx_intr_handler - hardware interrupt handler.
 629  * @irq: Unused
 630  * @dev_id: Pointer to host adapter structure
 631  **/
 632 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
 633 {
 634         struct scsi_qla_host *ha;
 635         uint32_t intr_status;
 636         unsigned long flags = 0;
 637         uint8_t reqs_count = 0;
 638
 639         ha = (struct scsi_qla_host *) dev_id;
 640         if (!ha) {
 641                 DEBUG2(printk(KERN_INFO
 642                               "qla4xxx: Interrupt with NULL host ptr\n"));
 643                 return IRQ_NONE;
 644         }
 645
 646         spin_lock_irqsave(&ha->hardware_lock, flags);
 647
 648         ha->isr_count++;
 649         /*
 650          * Repeatedly service interrupts up to a maximum of
 651          * MAX_REQS_SERVICED_PER_INTR
 652          */
 653         while (1) {
 654                 /*
 655                  * Read interrupt status
 656                  */
 657                 if (le32_to_cpu(ha->shadow_regs->rsp_q_in) !=
 658                     ha->response_out)
 659                         intr_status = CSR_SCSI_COMPLETION_INTR;
 660                 else
 661                         intr_status = readl(&ha->reg->ctrl_status);
 662
 663                 if ((intr_status &
 664                      (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) ==
 665                     0) {
 666                         if (reqs_count == 0)
 667                                 ha->spurious_int_count++;
 668                         break;
 669                 }
 670
 671                 if (intr_status & CSR_FATAL_ERROR) {
 672                         DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
 673                                       "Status 0x%04x\n", ha->host_no,
 674                                       readl(isp_port_error_status (ha))));
 675
 676                         /* Issue Soft Reset to clear this error condition.
 677                          * This will prevent the RISC from repeatedly
 678                          * interrupting the driver; thus, allowing the DPC to
 679                          * get scheduled to continue error recovery.
 680                          * NOTE: Disabling RISC interrupts does not work in
 681                          * this case, as CSR_FATAL_ERROR overrides
 682                          * CSR_SCSI_INTR_ENABLE */
 683                         if ((readl(&ha->reg->ctrl_status) &
 684                              CSR_SCSI_RESET_INTR) == 0) {
 685                                 writel(set_rmask(CSR_SOFT_RESET),
 686                                        &ha->reg->ctrl_status);
 687                                 readl(&ha->reg->ctrl_status);
 688                         }
 689
 690                         writel(set_rmask(CSR_FATAL_ERROR),
 691                                &ha->reg->ctrl_status);
 692                         readl(&ha->reg->ctrl_status);
 693
 694                         __qla4xxx_disable_intrs(ha);
 695
 696                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 697
 698                         break;
 699                 } else if (intr_status & CSR_SCSI_RESET_INTR) {
 700                         clear_bit(AF_ONLINE, &ha->flags);
 701                         __qla4xxx_disable_intrs(ha);
 702
 703                         writel(set_rmask(CSR_SCSI_RESET_INTR),
 704                                &ha->reg->ctrl_status);
 705                         readl(&ha->reg->ctrl_status);
 706
 707                         if (!ql4_mod_unload)
 708                                 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
 709
 710                         break;
 711                 } else if (intr_status & INTR_PENDING) {
 712                         qla4xxx_interrupt_service_routine(ha, intr_status);
 713                         ha->total_io_count++;
 714                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
 715                                 break;
 716
 717                         intr_status = 0;
 718                 }
 719         }
 720
 721         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 722
 723         return IRQ_HANDLED;
 724 }
 725
 726 /**
 727  * qla4xxx_process_aen - processes AENs generated by firmware
 728  * @ha: pointer to host adapter structure.
 729  * @process_aen: type of AENs to process
 730  *
 731  * Processes specific types of Asynchronous Events generated by firmware.
 732  * The type of AENs to process is specified by process_aen and can be
 733  *      PROCESS_ALL_AENS         0
 734  *      FLUSH_DDB_CHANGED_AENS   1
 735  *      RELOGIN_DDB_CHANGED_AENS 2
 736  **/
 737 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
 738 {
 739         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 740         struct aen *aen;
 741         int i;
 742         unsigned long flags;
 743
 744         spin_lock_irqsave(&ha->hardware_lock, flags);
 745         while (ha->aen_out != ha->aen_in) {
 746                 aen = &ha->aen_q[ha->aen_out];
 747                 /* copy aen information to local structure */
 748                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 749                         mbox_sts[i] = aen->mbox_sts[i];
 750
 751                 ha->aen_q_count++;
 752                 ha->aen_out++;
 753
 754                 if (ha->aen_out == MAX_AEN_ENTRIES)
 755                         ha->aen_out = 0;
 756
 757                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758
 759                 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
 760                         " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
 761                         (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
 762                         mbox_sts[0], mbox_sts[1], mbox_sts[2],
 763                         mbox_sts[3], mbox_sts[4]));
 764
 765                 switch (mbox_sts[0]) {
 766                 case MBOX_ASTS_DATABASE_CHANGED:
 767                         if (process_aen == FLUSH_DDB_CHANGED_AENS) {
 768                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
 769                                               "[%d] state=%04x FLUSHED!\n",
 770                                               ha->host_no, ha->aen_out,
 771                                               mbox_sts[0], mbox_sts[2],
 772                                               mbox_sts[3]));
 773                                 break;
 774                         } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
 775                                 /* for use during init time, we only want to
 776                                  * relogin non-active ddbs */
 777                                 struct ddb_entry *ddb_entry;
 778
 779                                 ddb_entry =
 780                                         /* FIXME: name length? */
 781                                         qla4xxx_lookup_ddb_by_fw_index(ha,
 782                                                                        mbox_sts[2]);
 783                                 if (!ddb_entry)
 784                                         break;
 785
 786                                 ddb_entry->dev_scan_wait_to_complete_relogin =
 787                                         0;
 788                                 ddb_entry->dev_scan_wait_to_start_relogin =
 789                                         jiffies +
 790                                         ((ddb_entry->default_time2wait +
 791                                           4) * HZ);
 792
 793                                 DEBUG2(printk("scsi%ld: ddb index [%d] initate"
 794                                               " RELOGIN after %d seconds\n",
 795                                               ha->host_no,
 796                                               ddb_entry->fw_ddb_index,
 797                                               ddb_entry->default_time2wait +
 798                                               4));
 799                                 break;
 800                         }
 801
 802                         if (mbox_sts[1] == 0) { /* Global DB change. */
 803                                 qla4xxx_reinitialize_ddb_list(ha);
 804                         } else if (mbox_sts[1] == 1) {  /* Specific device. */
 805                                 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
 806                                                             mbox_sts[3]);
 807                         }
 808                         break;
 809                 }
 810                 spin_lock_irqsave(&ha->hardware_lock, flags);
 811         }
 812         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 813 }
 814