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 & ISCSI_FLAG_RESIDUAL_OVER) {
  97                         cmd->result = DID_ERROR << 16;
  98                         break;
  99                 }
 100
 101                 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
 102                         scsi_set_resid(cmd, residual);
 103 <<<<<<< HEAD:drivers/scsi/qla4xxx/ql4_isr.c
 104                         if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
 105                                 cmd->underflow)) {
 106 =======
 107                         if ((scsi_bufflen(cmd) - residual) < cmd->underflow) {
 108 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/scsi/qla4xxx/ql4_isr.c
 109
 110                                 cmd->result = DID_ERROR << 16;
 111
 112                                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
 113                                         "Mid-layer Data underrun0, "
 114                                         "xferlen = 0x%x, "
 115                                         "residual = 0x%x\n", ha->host_no,
 116                                         cmd->device->channel,
 117                                         cmd->device->id,
 118                                         cmd->device->lun, __func__,
 119                                         scsi_bufflen(cmd), residual));
 120                                 break;
 121                         }
 122                 }
 123
 124                 cmd->result = DID_OK << 16 | scsi_status;
 125
 126                 if (scsi_status != SCSI_CHECK_CONDITION)
 127                         break;
 128
 129                 /* Copy Sense Data into sense buffer. */
 130                 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 131
 132                 sensebytecnt = le16_to_cpu(sts_entry->senseDataByteCnt);
 133                 if (sensebytecnt == 0)
 134                         break;
 135
 136                 memcpy(cmd->sense_buffer, sts_entry->senseData,
 137                        min_t(uint16_t, sensebytecnt, SCSI_SENSE_BUFFERSIZE));
 138
 139                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
 140                               "ASC/ASCQ = %02x/%02x\n", ha->host_no,
 141                               cmd->device->channel, cmd->device->id,
 142                               cmd->device->lun, __func__,
 143                               sts_entry->senseData[2] & 0x0f,
 144                               sts_entry->senseData[12],
 145                               sts_entry->senseData[13]));
 146
 147                 srb->flags |= SRB_GOT_SENSE;
 148                 break;
 149
 150         case SCS_INCOMPLETE:
 151                 /* Always set the status to DID_ERROR, since
 152                  * all conditions result in that status anyway */
 153                 cmd->result = DID_ERROR << 16;
 154                 break;
 155
 156         case SCS_RESET_OCCURRED:
 157                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
 158                               ha->host_no, cmd->device->channel,
 159                               cmd->device->id, cmd->device->lun, __func__));
 160
 161                 cmd->result = DID_RESET << 16;
 162                 break;
 163
 164         case SCS_ABORTED:
 165                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
 166                               ha->host_no, cmd->device->channel,
 167                               cmd->device->id, cmd->device->lun, __func__));
 168
 169                 cmd->result = DID_RESET << 16;
 170                 break;
 171
 172         case SCS_TIMEOUT:
 173                 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
 174                               ha->host_no, cmd->device->channel,
 175                               cmd->device->id, cmd->device->lun));
 176
 177                 cmd->result = DID_BUS_BUSY << 16;
 178
 179                 /*
 180                  * Mark device missing so that we won't continue to send
 181                  * I/O to this device.  We should get a ddb state change
 182                  * AEN soon.
 183                  */
 184                 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
 185                         qla4xxx_mark_device_missing(ha, ddb_entry);
 186                 break;
 187
 188         case SCS_DATA_UNDERRUN:
 189         case SCS_DATA_OVERRUN:
 190                 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
 191                         (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
 192                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, "
 193                                       "residual = 0x%x\n", ha->host_no,
 194                                       cmd->device->channel, cmd->device->id,
 195                                       cmd->device->lun, __func__, residual));
 196
 197                         cmd->result = DID_ERROR << 16;
 198                         break;
 199                 }
 200
 201                 scsi_set_resid(cmd, residual);
 202
 203                 /*
 204                  * If there is scsi_status, it takes precedense over
 205                  * underflow condition.
 206                  */
 207                 if (scsi_status != 0) {
 208                         cmd->result = DID_OK << 16 | scsi_status;
 209
 210                         if (scsi_status != SCSI_CHECK_CONDITION)
 211                                 break;
 212
 213                         /* Copy Sense Data into sense buffer. */
 214                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 215
 216                         sensebytecnt =
 217                                 le16_to_cpu(sts_entry->senseDataByteCnt);
 218                         if (sensebytecnt == 0)
 219                                 break;
 220
 221                         memcpy(cmd->sense_buffer, sts_entry->senseData,
 222                                min_t(uint16_t, sensebytecnt, SCSI_SENSE_BUFFERSIZE));
 223
 224                         DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
 225                                       "ASC/ASCQ = %02x/%02x\n", ha->host_no,
 226                                       cmd->device->channel, cmd->device->id,
 227                                       cmd->device->lun, __func__,
 228                                       sts_entry->senseData[2] & 0x0f,
 229                                       sts_entry->senseData[12],
 230                                       sts_entry->senseData[13]));
 231                 } else {
 232                         /*
 233                          * If RISC reports underrun and target does not
 234                          * report it then we must have a lost frame, so
 235                          * tell upper layer to retry it by reporting a
 236                          * bus busy.
 237                          */
 238                         if ((sts_entry->iscsiFlags &
 239                              ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
 240                                 cmd->result = DID_BUS_BUSY << 16;
 241                         } else if ((scsi_bufflen(cmd) - residual) <
 242                                    cmd->underflow) {
 243                                 /*
 244                                  * Handle mid-layer underflow???
 245                                  *
 246                                  * For kernels less than 2.4, the driver must
 247                                  * return an error if an underflow is detected.
 248                                  * For kernels equal-to and above 2.4, the
 249                                  * mid-layer will appearantly handle the
 250                                  * underflow by detecting the residual count --
 251                                  * unfortunately, we do not see where this is
 252                                  * actually being done.  In the interim, we
 253                                  * will return DID_ERROR.
 254                                  */
 255                                 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
 256                                         "Mid-layer Data underrun1, "
 257                                         "xferlen = 0x%x, "
 258                                         "residual = 0x%x\n", ha->host_no,
 259                                         cmd->device->channel,
 260                                         cmd->device->id,
 261                                         cmd->device->lun, __func__,
 262                                         scsi_bufflen(cmd), residual));
 263
 264                                 cmd->result = DID_ERROR << 16;
 265                         } else {
 266                                 cmd->result = DID_OK << 16;
 267                         }
 268                 }
 269                 break;
 270
 271         case SCS_DEVICE_LOGGED_OUT:
 272         case SCS_DEVICE_UNAVAILABLE:
 273                 /*
 274                  * Mark device missing so that we won't continue to
 275                  * send I/O to this device.  We should get a ddb
 276                  * state change AEN soon.
 277                  */
 278                 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
 279                         qla4xxx_mark_device_missing(ha, ddb_entry);
 280
 281                 cmd->result = DID_BUS_BUSY << 16;
 282                 break;
 283
 284         case SCS_QUEUE_FULL:
 285                 /*
 286                  * SCSI Mid-Layer handles device queue full
 287                  */
 288                 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
 289                 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
 290                               "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
 291                               " iResp=%02x\n", ha->host_no, cmd->device->id,
 292                               cmd->device->lun, __func__,
 293                               sts_entry->completionStatus,
 294                               sts_entry->scsiStatus, sts_entry->state_flags,
 295                               sts_entry->iscsiFlags,
 296                               sts_entry->iscsiResponse));
 297                 break;
 298
 299         default:
 300                 cmd->result = DID_ERROR << 16;
 301                 break;
 302         }
 303
 304 status_entry_exit:
 305
 306         /* complete the request */
 307         srb->cc_stat = sts_entry->completionStatus;
 308         qla4xxx_srb_compl(ha, srb);
 309 }
 310
 311 /**
 312  * qla4xxx_process_response_queue - process response queue completions
 313  * @ha: Pointer to host adapter structure.
 314  *
 315  * This routine process response queue completions in interrupt context.
 316  * Hardware_lock locked upon entry
 317  **/
 318 static void qla4xxx_process_response_queue(struct scsi_qla_host * ha)
 319 {
 320         uint32_t count = 0;
 321         struct srb *srb = NULL;
 322         struct status_entry *sts_entry;
 323
 324         /* Process all responses from response queue */
 325         while ((ha->response_in =
 326                 (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) !=
 327                ha->response_out) {
 328                 sts_entry = (struct status_entry *) ha->response_ptr;
 329                 count++;
 330
 331                 /* Advance pointers for next entry */
 332                 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
 333                         ha->response_out = 0;
 334                         ha->response_ptr = ha->response_ring;
 335                 } else {
 336                         ha->response_out++;
 337                         ha->response_ptr++;
 338                 }
 339
 340                 /* process entry */
 341                 switch (sts_entry->hdr.entryType) {
 342                 case ET_STATUS:
 343                         /*
 344                          * Common status - Single completion posted in single
 345                          * IOSB.
 346                          */
 347                         qla4xxx_status_entry(ha, sts_entry);
 348                         break;
 349
 350                 case ET_PASSTHRU_STATUS:
 351                         break;
 352
 353                 case ET_STATUS_CONTINUATION:
 354                         /* Just throw away the status continuation entries */
 355                         DEBUG2(printk("scsi%ld: %s: Status Continuation entry "
 356                                       "- ignoring\n", ha->host_no, __func__));
 357                         break;
 358
 359                 case ET_COMMAND:
 360                         /* ISP device queue is full. Command not
 361                          * accepted by ISP.  Queue command for
 362                          * later */
 363
 364                         srb = qla4xxx_del_from_active_array(ha,
 365                                                     le32_to_cpu(sts_entry->
 366                                                                 handle));
 367                         if (srb == NULL)
 368                                 goto exit_prq_invalid_handle;
 369
 370                         DEBUG2(printk("scsi%ld: %s: FW device queue full, "
 371                                       "srb %p\n", ha->host_no, __func__, srb));
 372
 373                         /* ETRY normally by sending it back with
 374                          * DID_BUS_BUSY */
 375                         srb->cmd->result = DID_BUS_BUSY << 16;
 376                         qla4xxx_srb_compl(ha, srb);
 377                         break;
 378
 379                 case ET_CONTINUE:
 380                         /* Just throw away the continuation entries */
 381                         DEBUG2(printk("scsi%ld: %s: Continuation entry - "
 382                                       "ignoring\n", ha->host_no, __func__));
 383                         break;
 384
 385                 default:
 386                         /*
 387                          * Invalid entry in response queue, reset RISC
 388                          * firmware.
 389                          */
 390                         DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
 391                                       "response queue \n", ha->host_no,
 392                                       __func__,
 393                                       sts_entry->hdr.entryType));
 394                         goto exit_prq_error;
 395                 }
 396         }
 397
 398         /*
 399          * Done with responses, update the ISP For QLA4010, this also clears
 400          * the interrupt.
 401          */
 402         writel(ha->response_out, &ha->reg->rsp_q_out);
 403         readl(&ha->reg->rsp_q_out);
 404
 405         return;
 406
 407 exit_prq_invalid_handle:
 408         DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
 409                       ha->host_no, __func__, srb, sts_entry->hdr.entryType,
 410                       sts_entry->completionStatus));
 411
 412 exit_prq_error:
 413         writel(ha->response_out, &ha->reg->rsp_q_out);
 414         readl(&ha->reg->rsp_q_out);
 415
 416         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 417 }
 418
 419 /**
 420  * qla4xxx_isr_decode_mailbox - decodes mailbox status
 421  * @ha: Pointer to host adapter structure.
 422  * @mailbox_status: Mailbox status.
 423  *
 424  * This routine decodes the mailbox status during the ISR.
 425  * Hardware_lock locked upon entry. runs in interrupt context.
 426  **/
 427 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
 428                                        uint32_t mbox_status)
 429 {
 430         int i;
 431         uint32_t mbox_stat2, mbox_stat3;
 432
 433         if ((mbox_status == MBOX_STS_BUSY) ||
 434             (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
 435             (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
 436                 ha->mbox_status[0] = mbox_status;
 437
 438                 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
 439                         /*
 440                          * Copy all mailbox registers to a temporary
 441                          * location and set mailbox command done flag
 442                          */
 443                         for (i = 1; i < ha->mbox_status_count; i++)
 444                                 ha->mbox_status[i] =
 445                                         readl(&ha->reg->mailbox[i]);
 446
 447                         set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
 448                 }
 449         } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
 450                 /* Immediately process the AENs that don't require much work.
 451                  * Only queue the database_changed AENs */
 452                 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
 453                         for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 454                                 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
 455                                         readl(&ha->reg->mailbox[i]);
 456                         ha->aen_log.count++;
 457                 }
 458                 switch (mbox_status) {
 459                 case MBOX_ASTS_SYSTEM_ERROR:
 460                         /* Log Mailbox registers */
 461                         if (ql4xdontresethba) {
 462                                 DEBUG2(printk("%s:Dont Reset HBA\n",
 463                                               __func__));
 464                         } else {
 465                                 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
 466                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 467                         }
 468                         break;
 469
 470                 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
 471                 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
 472                 case MBOX_ASTS_NVRAM_INVALID:
 473                 case MBOX_ASTS_IP_ADDRESS_CHANGED:
 474                 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
 475                         DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
 476                                       "Reset HA\n", ha->host_no, mbox_status));
 477                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 478                         break;
 479
 480                 case MBOX_ASTS_LINK_UP:
 481                         DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK UP\n",
 482                                       ha->host_no, mbox_status));
 483                         set_bit(AF_LINK_UP, &ha->flags);
 484                         break;
 485
 486                 case MBOX_ASTS_LINK_DOWN:
 487                         DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK DOWN\n",
 488                                       ha->host_no, mbox_status));
 489                         clear_bit(AF_LINK_UP, &ha->flags);
 490                         break;
 491
 492                 case MBOX_ASTS_HEARTBEAT:
 493                         ha->seconds_since_last_heartbeat = 0;
 494                         break;
 495
 496                 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
 497                         DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
 498                                       "ACQUIRED\n", ha->host_no, mbox_status));
 499                         set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 500                         break;
 501
 502                 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
 503                 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
 504                                                            * mode
 505                                                            * only */
 506                 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED:  /* Connection mode */
 507                 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
 508                 case MBOX_ASTS_SUBNET_STATE_CHANGE:
 509                         /* No action */
 510                         DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
 511                                       mbox_status));
 512                         break;
 513
 514                 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
 515                         mbox_stat2 = readl(&ha->reg->mailbox[2]);
 516                         mbox_stat3 = readl(&ha->reg->mailbox[3]);
 517
 518                         if ((mbox_stat3 == 5) && (mbox_stat2 == 3))
 519                                 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
 520                         else if ((mbox_stat3 == 2) && (mbox_stat2 == 5))
 521                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 522                         break;
 523
 524                 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
 525                 case MBOX_ASTS_DNS:
 526                         /* No action */
 527                         DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
 528                                       "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
 529                                       ha->host_no, mbox_status,
 530                                       readl(&ha->reg->mailbox[1]),
 531                                       readl(&ha->reg->mailbox[2])));
 532                         break;
 533
 534                 case MBOX_ASTS_SELF_TEST_FAILED:
 535                 case MBOX_ASTS_LOGIN_FAILED:
 536                         /* No action */
 537                         DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
 538                                       "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
 539                                       ha->host_no, mbox_status,
 540                                       readl(&ha->reg->mailbox[1]),
 541                                       readl(&ha->reg->mailbox[2]),
 542                                       readl(&ha->reg->mailbox[3])));
 543                         break;
 544
 545                 case MBOX_ASTS_DATABASE_CHANGED:
 546                         /* Queue AEN information and process it in the DPC
 547                          * routine */
 548                         if (ha->aen_q_count > 0) {
 549
 550                                 /* decrement available counter */
 551                                 ha->aen_q_count--;
 552
 553                                 for (i = 1; i < MBOX_AEN_REG_COUNT; i++)
 554                                         ha->aen_q[ha->aen_in].mbox_sts[i] =
 555                                                 readl(&ha->reg->mailbox[i]);
 556
 557                                 ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status;
 558
 559                                 /* print debug message */
 560                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
 561                                               " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
 562                                               ha->host_no, ha->aen_in,
 563                                               mbox_status,
 564                                               ha->aen_q[ha->aen_in].mbox_sts[1],
 565                                               ha->aen_q[ha->aen_in].mbox_sts[2],
 566                                               ha->aen_q[ha->aen_in].mbox_sts[3],
 567                                               ha->aen_q[ha->aen_in].  mbox_sts[4]));
 568                                 /* advance pointer */
 569                                 ha->aen_in++;
 570                                 if (ha->aen_in == MAX_AEN_ENTRIES)
 571                                         ha->aen_in = 0;
 572
 573                                 /* The DPC routine will process the aen */
 574                                 set_bit(DPC_AEN, &ha->dpc_flags);
 575                         } else {
 576                                 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
 577                                               "overflowed!  AEN LOST!!\n",
 578                                               ha->host_no, __func__,
 579                                               mbox_status));
 580
 581                                 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
 582                                               ha->host_no));
 583
 584                                 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
 585                                         DEBUG2(printk("AEN[%d] %04x %04x %04x "
 586                                                       "%04x\n", i,
 587                                                       ha->aen_q[i].mbox_sts[0],
 588                                                       ha->aen_q[i].mbox_sts[1],
 589                                                       ha->aen_q[i].mbox_sts[2],
 590                                                       ha->aen_q[i].mbox_sts[3]));
 591                                 }
 592                         }
 593                         break;
 594
 595                 default:
 596                         DEBUG2(printk(KERN_WARNING
 597                                       "scsi%ld: AEN %04x UNKNOWN\n",
 598                                       ha->host_no, mbox_status));
 599                         break;
 600                 }
 601         } else {
 602                 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
 603                               ha->host_no, mbox_status));
 604
 605                 ha->mbox_status[0] = mbox_status;
 606         }
 607 }
 608
 609 /**
 610  * qla4xxx_interrupt_service_routine - isr
 611  * @ha: pointer to host adapter structure.
 612  *
 613  * This is the main interrupt service routine.
 614  * hardware_lock locked upon entry. runs in interrupt context.
 615  **/
 616 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
 617                                        uint32_t intr_status)
 618 {
 619         /* Process response queue interrupt. */
 620         if (intr_status & CSR_SCSI_COMPLETION_INTR)
 621                 qla4xxx_process_response_queue(ha);
 622
 623         /* Process mailbox/asynch event  interrupt.*/
 624         if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
 625                 qla4xxx_isr_decode_mailbox(ha,
 626                                            readl(&ha->reg->mailbox[0]));
 627
 628                 /* Clear Mailbox Interrupt */
 629                 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
 630                        &ha->reg->ctrl_status);
 631                 readl(&ha->reg->ctrl_status);
 632         }
 633 }
 634
 635 /**
 636  * qla4xxx_intr_handler - hardware interrupt handler.
 637  * @irq: Unused
 638  * @dev_id: Pointer to host adapter structure
 639  **/
 640 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
 641 {
 642         struct scsi_qla_host *ha;
 643         uint32_t intr_status;
 644         unsigned long flags = 0;
 645         uint8_t reqs_count = 0;
 646
 647         ha = (struct scsi_qla_host *) dev_id;
 648         if (!ha) {
 649                 DEBUG2(printk(KERN_INFO
 650                               "qla4xxx: Interrupt with NULL host ptr\n"));
 651                 return IRQ_NONE;
 652         }
 653
 654         spin_lock_irqsave(&ha->hardware_lock, flags);
 655
 656         ha->isr_count++;
 657         /*
 658          * Repeatedly service interrupts up to a maximum of
 659          * MAX_REQS_SERVICED_PER_INTR
 660          */
 661         while (1) {
 662                 /*
 663                  * Read interrupt status
 664                  */
 665                 if (le32_to_cpu(ha->shadow_regs->rsp_q_in) !=
 666                     ha->response_out)
 667                         intr_status = CSR_SCSI_COMPLETION_INTR;
 668                 else
 669                         intr_status = readl(&ha->reg->ctrl_status);
 670
 671                 if ((intr_status &
 672                      (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) ==
 673                     0) {
 674                         if (reqs_count == 0)
 675                                 ha->spurious_int_count++;
 676                         break;
 677                 }
 678
 679                 if (intr_status & CSR_FATAL_ERROR) {
 680                         DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
 681                                       "Status 0x%04x\n", ha->host_no,
 682                                       readl(isp_port_error_status (ha))));
 683
 684                         /* Issue Soft Reset to clear this error condition.
 685                          * This will prevent the RISC from repeatedly
 686                          * interrupting the driver; thus, allowing the DPC to
 687                          * get scheduled to continue error recovery.
 688                          * NOTE: Disabling RISC interrupts does not work in
 689                          * this case, as CSR_FATAL_ERROR overrides
 690                          * CSR_SCSI_INTR_ENABLE */
 691                         if ((readl(&ha->reg->ctrl_status) &
 692                              CSR_SCSI_RESET_INTR) == 0) {
 693                                 writel(set_rmask(CSR_SOFT_RESET),
 694                                        &ha->reg->ctrl_status);
 695                                 readl(&ha->reg->ctrl_status);
 696                         }
 697
 698                         writel(set_rmask(CSR_FATAL_ERROR),
 699                                &ha->reg->ctrl_status);
 700                         readl(&ha->reg->ctrl_status);
 701
 702                         __qla4xxx_disable_intrs(ha);
 703
 704                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 705
 706                         break;
 707                 } else if (intr_status & CSR_SCSI_RESET_INTR) {
 708                         clear_bit(AF_ONLINE, &ha->flags);
 709                         __qla4xxx_disable_intrs(ha);
 710
 711                         writel(set_rmask(CSR_SCSI_RESET_INTR),
 712                                &ha->reg->ctrl_status);
 713                         readl(&ha->reg->ctrl_status);
 714
 715                         if (!ql4_mod_unload)
 716                                 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
 717
 718                         break;
 719                 } else if (intr_status & INTR_PENDING) {
 720                         qla4xxx_interrupt_service_routine(ha, intr_status);
 721                         ha->total_io_count++;
 722                         if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
 723                                 break;
 724
 725                         intr_status = 0;
 726                 }
 727         }
 728
 729         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 730
 731         return IRQ_HANDLED;
 732 }
 733
 734 /**
 735  * qla4xxx_process_aen - processes AENs generated by firmware
 736  * @ha: pointer to host adapter structure.
 737  * @process_aen: type of AENs to process
 738  *
 739  * Processes specific types of Asynchronous Events generated by firmware.
 740  * The type of AENs to process is specified by process_aen and can be
 741  *      PROCESS_ALL_AENS         0
 742  *      FLUSH_DDB_CHANGED_AENS   1
 743  *      RELOGIN_DDB_CHANGED_AENS 2
 744  **/
 745 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
 746 {
 747         uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
 748         struct aen *aen;
 749         int i;
 750         unsigned long flags;
 751
 752         spin_lock_irqsave(&ha->hardware_lock, flags);
 753         while (ha->aen_out != ha->aen_in) {
 754                 aen = &ha->aen_q[ha->aen_out];
 755                 /* copy aen information to local structure */
 756                 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
 757                         mbox_sts[i] = aen->mbox_sts[i];
 758
 759                 ha->aen_q_count++;
 760                 ha->aen_out++;
 761
 762                 if (ha->aen_out == MAX_AEN_ENTRIES)
 763                         ha->aen_out = 0;
 764
 765                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 766
 767                 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
 768                         " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
 769                         (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
 770                         mbox_sts[0], mbox_sts[1], mbox_sts[2],
 771                         mbox_sts[3], mbox_sts[4]));
 772
 773                 switch (mbox_sts[0]) {
 774                 case MBOX_ASTS_DATABASE_CHANGED:
 775                         if (process_aen == FLUSH_DDB_CHANGED_AENS) {
 776                                 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
 777                                               "[%d] state=%04x FLUSHED!\n",
 778                                               ha->host_no, ha->aen_out,
 779                                               mbox_sts[0], mbox_sts[2],
 780                                               mbox_sts[3]));
 781                                 break;
 782                         } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
 783                                 /* for use during init time, we only want to
 784                                  * relogin non-active ddbs */
 785                                 struct ddb_entry *ddb_entry;
 786
 787                                 ddb_entry =
 788                                         /* FIXME: name length? */
 789                                         qla4xxx_lookup_ddb_by_fw_index(ha,
 790                                                                        mbox_sts[2]);
 791                                 if (!ddb_entry)
 792                                         break;
 793
 794                                 ddb_entry->dev_scan_wait_to_complete_relogin =
 795                                         0;
 796                                 ddb_entry->dev_scan_wait_to_start_relogin =
 797                                         jiffies +
 798                                         ((ddb_entry->default_time2wait +
 799                                           4) * HZ);
 800
 801                                 DEBUG2(printk("scsi%ld: ddb index [%d] initate"
 802                                               " RELOGIN after %d seconds\n",
 803                                               ha->host_no,
 804                                               ddb_entry->fw_ddb_index,
 805                                               ddb_entry->default_time2wait +
 806                                               4));
 807                                 break;
 808                         }
 809
 810                         if (mbox_sts[1] == 0) { /* Global DB change. */
 811                                 qla4xxx_reinitialize_ddb_list(ha);
 812                         } else if (mbox_sts[1] == 1) {  /* Specific device. */
 813                                 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
 814                                                             mbox_sts[3]);
 815                         }
 816                         break;
 817                 }
 818                 spin_lock_irqsave(&ha->hardware_lock, flags);
 819         }
 820         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 821 }
 822