drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <scsi/scsi_tcq.h>
  10
  11 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  12 static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
  13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  17 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  18
  19 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
  20
  21 /**
  22  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  23  * @irq:
  24  * @dev_id: SCSI driver HA context
  25  *
  26  * Called by system whenever the host adapter generates an interrupt.
  27  *
  28  * Returns handled flag.
  29  */
  30 irqreturn_t
  31 qla2100_intr_handler(int irq, void *dev_id)
  32 {
  33         scsi_qla_host_t *ha;
  34         struct device_reg_2xxx __iomem *reg;
  35         int             status;
  36         unsigned long   flags;
  37         unsigned long   iter;
  38         uint16_t        mb[4];
  39
  40         ha = (scsi_qla_host_t *) dev_id;
  41         if (!ha) {
  42                 printk(KERN_INFO
  43                     "%s(): NULL host pointer\n", __func__);
  44                 return (IRQ_NONE);
  45         }
  46
  47         reg = &ha->iobase->isp;
  48         status = 0;
  49
  50         spin_lock_irqsave(&ha->hardware_lock, flags);
  51         for (iter = 50; iter--; ) {
  52                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  53                         break;
  54
  55                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  56                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  57                         RD_REG_WORD(&reg->hccr);
  58
  59                         /* Get mailbox data. */
  60                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  61                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  62                                 qla2x00_mbx_completion(ha, mb[0]);
  63                                 status |= MBX_INTERRUPT;
  64                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  65                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  66                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  67                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  68                                 qla2x00_async_event(ha, mb);
  69                         } else {
  70                                 /*EMPTY*/
  71                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  72                                     "interrupt type (%d).\n",
  73                                     ha->host_no, mb[0]));
  74                         }
  75                         /* Release mailbox registers. */
  76                         WRT_REG_WORD(&reg->semaphore, 0);
  77                         RD_REG_WORD(&reg->semaphore);
  78                 } else {
  79                         qla2x00_process_response_queue(ha);
  80
  81                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  82                         RD_REG_WORD(&reg->hccr);
  83                 }
  84         }
  85         spin_unlock_irqrestore(&ha->hardware_lock, flags);
  86
  87         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
  88             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
  89                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  90                 up(&ha->mbx_intr_sem);
  91         }
  92
  93         return (IRQ_HANDLED);
  94 }
  95
  96 /**
  97  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
  98  * @irq:
  99  * @dev_id: SCSI driver HA context
 100  *
 101  * Called by system whenever the host adapter generates an interrupt.
 102  *
 103  * Returns handled flag.
 104  */
 105 irqreturn_t
 106 qla2300_intr_handler(int irq, void *dev_id)
 107 {
 108         scsi_qla_host_t *ha;
 109         struct device_reg_2xxx __iomem *reg;
 110         int             status;
 111         unsigned long   flags;
 112         unsigned long   iter;
 113         uint32_t        stat;
 114         uint16_t        hccr;
 115         uint16_t        mb[4];
 116
 117         ha = (scsi_qla_host_t *) dev_id;
 118         if (!ha) {
 119                 printk(KERN_INFO
 120                     "%s(): NULL host pointer\n", __func__);
 121                 return (IRQ_NONE);
 122         }
 123
 124         reg = &ha->iobase->isp;
 125         status = 0;
 126
 127         spin_lock_irqsave(&ha->hardware_lock, flags);
 128         for (iter = 50; iter--; ) {
 129                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 130                 if (stat & HSR_RISC_PAUSED) {
 131                         hccr = RD_REG_WORD(&reg->hccr);
 132                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 133                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 134                                     "HCCR=%x, Dumping firmware!\n", hccr);
 135                         else
 136                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 137                                     "HCCR=%x, Dumping firmware!\n", hccr);
 138
 139                         /*
 140                          * Issue a "HARD" reset in order for the RISC
 141                          * interrupt bit to be cleared.  Schedule a big
 142                          * hammmer to get out of the RISC PAUSED state.
 143                          */
 144                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 145                         RD_REG_WORD(&reg->hccr);
 146
 147                         ha->isp_ops.fw_dump(ha, 1);
 148                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 149                         break;
 150                 } else if ((stat & HSR_RISC_INT) == 0)
 151                         break;
 152
 153                 switch (stat & 0xff) {
 154                 case 0x1:
 155                 case 0x2:
 156                 case 0x10:
 157                 case 0x11:
 158                         qla2x00_mbx_completion(ha, MSW(stat));
 159                         status |= MBX_INTERRUPT;
 160
 161                         /* Release mailbox registers. */
 162                         WRT_REG_WORD(&reg->semaphore, 0);
 163                         break;
 164                 case 0x12:
 165                         mb[0] = MSW(stat);
 166                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 167                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 168                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 169                         qla2x00_async_event(ha, mb);
 170                         break;
 171                 case 0x13:
 172                         qla2x00_process_response_queue(ha);
 173                         break;
 174                 case 0x15:
 175                         mb[0] = MBA_CMPLT_1_16BIT;
 176                         mb[1] = MSW(stat);
 177                         qla2x00_async_event(ha, mb);
 178                         break;
 179                 case 0x16:
 180                         mb[0] = MBA_SCSI_COMPLETION;
 181                         mb[1] = MSW(stat);
 182                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 183                         qla2x00_async_event(ha, mb);
 184                         break;
 185                 default:
 186                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 187                             "(%d).\n",
 188                             ha->host_no, stat & 0xff));
 189                         break;
 190                 }
 191                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 192                 RD_REG_WORD_RELAXED(&reg->hccr);
 193         }
 194         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 195
 196         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 197             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 198                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 199                 up(&ha->mbx_intr_sem);
 200         }
 201
 202         return (IRQ_HANDLED);
 203 }
 204
 205 /**
 206  * qla2x00_mbx_completion() - Process mailbox command completions.
 207  * @ha: SCSI driver HA context
 208  * @mb0: Mailbox0 register
 209  */
 210 static void
 211 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 212 {
 213         uint16_t        cnt;
 214         uint16_t __iomem *wptr;
 215         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 216
 217         /* Load return mailbox registers. */
 218         ha->flags.mbox_int = 1;
 219         ha->mailbox_out[0] = mb0;
 220         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 221
 222         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 223                 if (IS_QLA2200(ha) && cnt == 8)
 224                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 225                 if (cnt == 4 || cnt == 5)
 226                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 227                 else
 228                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 229
 230                 wptr++;
 231         }
 232
 233         if (ha->mcp) {
 234                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 235                     __func__, ha->host_no, ha->mcp->mb[0]));
 236         } else {
 237                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 238                     __func__, ha->host_no));
 239         }
 240 }
 241
 242 /**
 243  * qla2x00_async_event() - Process aynchronous events.
 244  * @ha: SCSI driver HA context
 245  * @mb: Mailbox registers (0 - 3)
 246  */
 247 static void
 248 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 249 {
 250 #define LS_UNKNOWN      2
 251         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
 252         char            *link_speed;
 253         uint16_t        handle_cnt;
 254         uint16_t        cnt;
 255         uint32_t        handles[5];
 256         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 257         uint32_t        rscn_entry, host_pid;
 258         uint8_t         rscn_queue_index;
 259
 260         /* Setup to process RIO completion. */
 261         handle_cnt = 0;
 262         switch (mb[0]) {
 263         case MBA_SCSI_COMPLETION:
 264                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 265                 handle_cnt = 1;
 266                 break;
 267         case MBA_CMPLT_1_16BIT:
 268                 handles[0] = mb[1];
 269                 handle_cnt = 1;
 270                 mb[0] = MBA_SCSI_COMPLETION;
 271                 break;
 272         case MBA_CMPLT_2_16BIT:
 273                 handles[0] = mb[1];
 274                 handles[1] = mb[2];
 275                 handle_cnt = 2;
 276                 mb[0] = MBA_SCSI_COMPLETION;
 277                 break;
 278         case MBA_CMPLT_3_16BIT:
 279                 handles[0] = mb[1];
 280                 handles[1] = mb[2];
 281                 handles[2] = mb[3];
 282                 handle_cnt = 3;
 283                 mb[0] = MBA_SCSI_COMPLETION;
 284                 break;
 285         case MBA_CMPLT_4_16BIT:
 286                 handles[0] = mb[1];
 287                 handles[1] = mb[2];
 288                 handles[2] = mb[3];
 289                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 290                 handle_cnt = 4;
 291                 mb[0] = MBA_SCSI_COMPLETION;
 292                 break;
 293         case MBA_CMPLT_5_16BIT:
 294                 handles[0] = mb[1];
 295                 handles[1] = mb[2];
 296                 handles[2] = mb[3];
 297                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 298                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 299                 handle_cnt = 5;
 300                 mb[0] = MBA_SCSI_COMPLETION;
 301                 break;
 302         case MBA_CMPLT_2_32BIT:
 303                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 304                 handles[1] = le32_to_cpu(
 305                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 306                     RD_MAILBOX_REG(ha, reg, 6));
 307                 handle_cnt = 2;
 308                 mb[0] = MBA_SCSI_COMPLETION;
 309                 break;
 310         default:
 311                 break;
 312         }
 313
 314         switch (mb[0]) {
 315         case MBA_SCSI_COMPLETION:       /* Fast Post */
 316                 if (!ha->flags.online)
 317                         break;
 318
 319                 for (cnt = 0; cnt < handle_cnt; cnt++)
 320                         qla2x00_process_completed_request(ha, handles[cnt]);
 321                 break;
 322
 323         case MBA_RESET:                 /* Reset */
 324                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 325
 326                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 327                 break;
 328
 329         case MBA_SYSTEM_ERR:            /* System Error */
 330                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 331                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 332                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 333
 334                 qla_printk(KERN_INFO, ha,
 335                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 336                     mb[1], mb[2], mb[3]);
 337
 338                 ha->isp_ops.fw_dump(ha, 1);
 339
 340                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 341                         if (mb[1] == 0 && mb[2] == 0) {
 342                                 qla_printk(KERN_ERR, ha,
 343                                     "Unrecoverable Hardware Error: adapter "
 344                                     "marked OFFLINE!\n");
 345                                 ha->flags.online = 0;
 346                         } else
 347                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 348                 } else if (mb[1] == 0) {
 349                         qla_printk(KERN_INFO, ha,
 350                             "Unrecoverable Hardware Error: adapter marked "
 351                             "OFFLINE!\n");
 352                         ha->flags.online = 0;
 353                 } else
 354                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 355                 break;
 356
 357         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 358                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 359                     ha->host_no));
 360                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 361
 362                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 363                 break;
 364
 365         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 366                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 367                     ha->host_no));
 368                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 369
 370                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 371                 break;
 372
 373         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 374                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 375                     ha->host_no));
 376                 break;
 377
 378         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 379                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 380                     mb[1]));
 381                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 382
 383                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 384                         atomic_set(&ha->loop_state, LOOP_DOWN);
 385                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 386                         qla2x00_mark_all_devices_lost(ha, 1);
 387                 }
 388
 389                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 390
 391                 ha->flags.management_server_logged_in = 0;
 392                 break;
 393
 394         case MBA_LOOP_UP:               /* Loop Up Event */
 395                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 396                         link_speed = link_speeds[0];
 397                         ha->link_data_rate = PORT_SPEED_1GB;
 398                 } else {
 399                         link_speed = link_speeds[LS_UNKNOWN];
 400                         if (mb[1] < 5)
 401                                 link_speed = link_speeds[mb[1]];
 402                         ha->link_data_rate = mb[1];
 403                 }
 404
 405                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 406                     ha->host_no, link_speed));
 407                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 408                     link_speed);
 409
 410                 ha->flags.management_server_logged_in = 0;
 411                 break;
 412
 413         case MBA_LOOP_DOWN:             /* Loop Down Event */
 414                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 415                     ha->host_no, mb[1]));
 416                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 417
 418                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 419                         atomic_set(&ha->loop_state, LOOP_DOWN);
 420                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 421                         ha->device_flags |= DFLG_NO_CABLE;
 422                         qla2x00_mark_all_devices_lost(ha, 1);
 423                 }
 424
 425                 ha->flags.management_server_logged_in = 0;
 426                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 427                 if (ql2xfdmienable)
 428                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 429                 break;
 430
 431         case MBA_LIP_RESET:             /* LIP reset occurred */
 432                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 433                     ha->host_no, mb[1]));
 434                 qla_printk(KERN_INFO, ha,
 435                     "LIP reset occured (%x).\n", mb[1]);
 436
 437                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 438                         atomic_set(&ha->loop_state, LOOP_DOWN);
 439                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 440                         qla2x00_mark_all_devices_lost(ha, 1);
 441                 }
 442
 443                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 444
 445                 ha->operating_mode = LOOP;
 446                 ha->flags.management_server_logged_in = 0;
 447                 break;
 448
 449         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 450                 if (IS_QLA2100(ha))
 451                         break;
 452
 453                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 454                     ha->host_no));
 455
 456                 /*
 457                  * Until there's a transition from loop down to loop up, treat
 458                  * this as loop down only.
 459                  */
 460                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 461                         atomic_set(&ha->loop_state, LOOP_DOWN);
 462                         if (!atomic_read(&ha->loop_down_timer))
 463                                 atomic_set(&ha->loop_down_timer,
 464                                     LOOP_DOWN_TIME);
 465                         qla2x00_mark_all_devices_lost(ha, 1);
 466                 }
 467
 468                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 469                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 470                 }
 471                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 472
 473                 ha->flags.gpsc_supported = 1;
 474                 break;
 475
 476         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 477                 if (IS_QLA2100(ha))
 478                         break;
 479
 480                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 481                     "received.\n",
 482                     ha->host_no));
 483                 qla_printk(KERN_INFO, ha,
 484                     "Configuration change detected: value=%x.\n", mb[1]);
 485
 486                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 487                         atomic_set(&ha->loop_state, LOOP_DOWN);
 488                         if (!atomic_read(&ha->loop_down_timer))
 489                                 atomic_set(&ha->loop_down_timer,
 490                                     LOOP_DOWN_TIME);
 491                         qla2x00_mark_all_devices_lost(ha, 1);
 492                 }
 493
 494                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 495                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 496                 break;
 497
 498         case MBA_PORT_UPDATE:           /* Port database update */
 499                 /*
 500                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 501                  * event etc. earlier indicating loop is down) then process
 502                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 503                  */
 504                 atomic_set(&ha->loop_down_timer, 0);
 505                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 506                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 507                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 508                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 509                             mb[2], mb[3]));
 510                         break;
 511                 }
 512
 513                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 514                     ha->host_no));
 515                 DEBUG(printk(KERN_INFO
 516                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 517                     ha->host_no, mb[1], mb[2], mb[3]));
 518
 519                 /*
 520                  * Mark all devices as missing so we will login again.
 521                  */
 522                 atomic_set(&ha->loop_state, LOOP_UP);
 523
 524                 qla2x00_mark_all_devices_lost(ha, 1);
 525
 526                 ha->flags.rscn_queue_overflow = 1;
 527
 528                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 529                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 530                 break;
 531
 532         case MBA_RSCN_UPDATE:           /* State Change Registration */
 533                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 534                     ha->host_no));
 535                 DEBUG(printk(KERN_INFO
 536                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 537                     ha->host_no, mb[1], mb[2]));
 538
 539                 rscn_entry = (mb[1] << 16) | mb[2];
 540                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 541                     ha->d_id.b.al_pa;
 542                 if (rscn_entry == host_pid) {
 543                         DEBUG(printk(KERN_INFO
 544                             "scsi(%ld): Ignoring RSCN update to local host "
 545                             "port ID (%06x)\n",
 546                             ha->host_no, host_pid));
 547                         break;
 548                 }
 549
 550                 rscn_queue_index = ha->rscn_in_ptr + 1;
 551                 if (rscn_queue_index == MAX_RSCN_COUNT)
 552                         rscn_queue_index = 0;
 553                 if (rscn_queue_index != ha->rscn_out_ptr) {
 554                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 555                         ha->rscn_in_ptr = rscn_queue_index;
 556                 } else {
 557                         ha->flags.rscn_queue_overflow = 1;
 558                 }
 559
 560                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 561                 atomic_set(&ha->loop_down_timer, 0);
 562                 ha->flags.management_server_logged_in = 0;
 563
 564                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 565                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 566                 break;
 567
 568         /* case MBA_RIO_RESPONSE: */
 569         case MBA_ZIO_RESPONSE:
 570                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 571                     ha->host_no));
 572                 DEBUG(printk(KERN_INFO
 573                     "scsi(%ld): [R|Z]IO update completion.\n",
 574                     ha->host_no));
 575
 576                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 577                         qla24xx_process_response_queue(ha);
 578                 else
 579                         qla2x00_process_response_queue(ha);
 580                 break;
 581
 582         case MBA_DISCARD_RND_FRAME:
 583                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 584                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 585                 break;
 586
 587         case MBA_TRACE_NOTIFICATION:
 588                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 589                 ha->host_no, mb[1], mb[2]));
 590                 break;
 591         }
 592 }
 593
 594 static void
 595 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 596 {
 597         fc_port_t *fcport = data;
 598
 599         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 600                 return;
 601
 602         if (sdev->ordered_tags)
 603                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 604                     sdev->queue_depth + 1);
 605         else
 606                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 607                     sdev->queue_depth + 1);
 608
 609         fcport->last_ramp_up = jiffies;
 610
 611         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 612             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 613             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 614             sdev->queue_depth));
 615 }
 616
 617 static void
 618 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 619 {
 620         fc_port_t *fcport = data;
 621
 622         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 623                 return;
 624
 625         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 626             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 627             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 628             sdev->queue_depth));
 629 }
 630
 631 static inline void
 632 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 633 {
 634         fc_port_t *fcport;
 635         struct scsi_device *sdev;
 636
 637         sdev = sp->cmd->device;
 638         if (sdev->queue_depth >= ha->max_q_depth)
 639                 return;
 640
 641         fcport = sp->fcport;
 642         if (time_before(jiffies,
 643             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 644                 return;
 645         if (time_before(jiffies,
 646             fcport->last_queue_full + ql2xqfullrampup * HZ))
 647                 return;
 648
 649         starget_for_each_device(sdev->sdev_target, fcport,
 650             qla2x00_adjust_sdev_qdepth_up);
 651 }
 652
 653 /**
 654  * qla2x00_process_completed_request() - Process a Fast Post response.
 655  * @ha: SCSI driver HA context
 656  * @index: SRB index
 657  */
 658 static void
 659 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 660 {
 661         srb_t *sp;
 662
 663         /* Validate handle. */
 664         if (index >= MAX_OUTSTANDING_COMMANDS) {
 665                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 666                     ha->host_no, index));
 667                 qla_printk(KERN_WARNING, ha,
 668                     "Invalid SCSI completion handle %d.\n", index);
 669
 670                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 671                 return;
 672         }
 673
 674         sp = ha->outstanding_cmds[index];
 675         if (sp) {
 676                 /* Free outstanding command slot. */
 677                 ha->outstanding_cmds[index] = NULL;
 678
 679                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 680                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 681
 682                 /* Save ISP completion status */
 683                 sp->cmd->result = DID_OK << 16;
 684
 685                 qla2x00_ramp_up_queue_depth(ha, sp);
 686                 qla2x00_sp_compl(ha, sp);
 687         } else {
 688                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 689                     ha->host_no));
 690                 qla_printk(KERN_WARNING, ha,
 691                     "Invalid ISP SCSI completion handle\n");
 692
 693                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 694         }
 695 }
 696
 697 /**
 698  * qla2x00_process_response_queue() - Process response queue entries.
 699  * @ha: SCSI driver HA context
 700  */
 701 void
 702 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 703 {
 704         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 705         sts_entry_t     *pkt;
 706         uint16_t        handle_cnt;
 707         uint16_t        cnt;
 708
 709         if (!ha->flags.online)
 710                 return;
 711
 712         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 713                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 714
 715                 ha->rsp_ring_index++;
 716                 if (ha->rsp_ring_index == ha->response_q_length) {
 717                         ha->rsp_ring_index = 0;
 718                         ha->response_ring_ptr = ha->response_ring;
 719                 } else {
 720                         ha->response_ring_ptr++;
 721                 }
 722
 723                 if (pkt->entry_status != 0) {
 724                         DEBUG3(printk(KERN_INFO
 725                             "scsi(%ld): Process error entry.\n", ha->host_no));
 726
 727                         qla2x00_error_entry(ha, pkt);
 728                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 729                         wmb();
 730                         continue;
 731                 }
 732
 733                 switch (pkt->entry_type) {
 734                 case STATUS_TYPE:
 735                         qla2x00_status_entry(ha, pkt);
 736                         break;
 737                 case STATUS_TYPE_21:
 738                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 739                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 740                                 qla2x00_process_completed_request(ha,
 741                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 742                         }
 743                         break;
 744                 case STATUS_TYPE_22:
 745                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 746                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 747                                 qla2x00_process_completed_request(ha,
 748                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 749                         }
 750                         break;
 751                 case STATUS_CONT_TYPE:
 752                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 753                         break;
 754                 case MS_IOCB_TYPE:
 755                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 756                         break;
 757                 default:
 758                         /* Type Not Supported. */
 759                         DEBUG4(printk(KERN_WARNING
 760                             "scsi(%ld): Received unknown response pkt type %x "
 761                             "entry status=%x.\n",
 762                             ha->host_no, pkt->entry_type, pkt->entry_status));
 763                         break;
 764                 }
 765                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 766                 wmb();
 767         }
 768
 769         /* Adjust ring index */
 770         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 771 }
 772
 773 /**
 774  * qla2x00_status_entry() - Process a Status IOCB entry.
 775  * @ha: SCSI driver HA context
 776  * @pkt: Entry pointer
 777  */
 778 static void
 779 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 780 {
 781         srb_t           *sp;
 782         fc_port_t       *fcport;
 783         struct scsi_cmnd *cp;
 784         sts_entry_t *sts;
 785         struct sts_entry_24xx *sts24;
 786         uint16_t        comp_status;
 787         uint16_t        scsi_status;
 788         uint8_t         lscsi_status;
 789         int32_t         resid;
 790         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 791         uint8_t         *rsp_info, *sense_data;
 792
 793         sts = (sts_entry_t *) pkt;
 794         sts24 = (struct sts_entry_24xx *) pkt;
 795         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 796                 comp_status = le16_to_cpu(sts24->comp_status);
 797                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 798         } else {
 799                 comp_status = le16_to_cpu(sts->comp_status);
 800                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 801         }
 802
 803         /* Fast path completion. */
 804         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 805                 qla2x00_process_completed_request(ha, sts->handle);
 806
 807                 return;
 808         }
 809
 810         /* Validate handle. */
 811         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 812                 sp = ha->outstanding_cmds[sts->handle];
 813                 ha->outstanding_cmds[sts->handle] = NULL;
 814         } else
 815                 sp = NULL;
 816
 817         if (sp == NULL) {
 818                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 819                     ha->host_no));
 820                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 821
 822                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 823                 qla2xxx_wake_dpc(ha);
 824                 return;
 825         }
 826         cp = sp->cmd;
 827         if (cp == NULL) {
 828                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 829                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 830                 qla_printk(KERN_WARNING, ha,
 831                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 832
 833                 return;
 834         }
 835
 836         lscsi_status = scsi_status & STATUS_MASK;
 837         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 838         CMD_COMPL_STATUS(cp) = comp_status;
 839         CMD_SCSI_STATUS(cp) = scsi_status;
 840
 841         fcport = sp->fcport;
 842
 843         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 844         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 845                 sense_len = le32_to_cpu(sts24->sense_len);
 846                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 847                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 848                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 849                 rsp_info = sts24->data;
 850                 sense_data = sts24->data;
 851                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 852         } else {
 853                 sense_len = le16_to_cpu(sts->req_sense_length);
 854                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 855                 resid_len = le32_to_cpu(sts->residual_length);
 856                 rsp_info = sts->rsp_info;
 857                 sense_data = sts->req_sense_data;
 858         }
 859
 860         /* Check for any FCP transport errors. */
 861         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 862                 /* Sense data lies beyond any FCP RESPONSE data. */
 863                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 864                         sense_data += rsp_info_len;
 865                 if (rsp_info_len > 3 && rsp_info[3]) {
 866                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 867                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 868                             "retrying command\n", ha->host_no,
 869                             cp->device->channel, cp->device->id,
 870                             cp->device->lun, rsp_info_len, rsp_info[0],
 871                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 872                             rsp_info[5], rsp_info[6], rsp_info[7]));
 873
 874                         cp->result = DID_BUS_BUSY << 16;
 875                         qla2x00_sp_compl(ha, sp);
 876                         return;
 877                 }
 878         }
 879
 880         /*
 881          * Based on Host and scsi status generate status code for Linux
 882          */
 883         switch (comp_status) {
 884         case CS_COMPLETE:
 885         case CS_QUEUE_FULL:
 886                 if (scsi_status == 0) {
 887                         cp->result = DID_OK << 16;
 888                         break;
 889                 }
 890                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 891                         resid = resid_len;
 892                         cp->resid = resid;
 893                         CMD_RESID_LEN(cp) = resid;
 894
 895                         if (!lscsi_status &&
 896                             ((unsigned)(cp->request_bufflen - resid) <
 897                              cp->underflow)) {
 898                                 qla_printk(KERN_INFO, ha,
 899                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 900                                     "detected (%x of %x bytes)...returning "
 901                                     "error status.\n", ha->host_no,
 902                                     cp->device->channel, cp->device->id,
 903                                     cp->device->lun, resid,
 904                                     cp->request_bufflen);
 905
 906                                 cp->result = DID_ERROR << 16;
 907                                 break;
 908                         }
 909                 }
 910                 cp->result = DID_OK << 16 | lscsi_status;
 911
 912                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 913                         DEBUG2(printk(KERN_INFO
 914                             "scsi(%ld): QUEUE FULL status detected "
 915                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 916                             scsi_status));
 917
 918                         /* Adjust queue depth for all luns on the port. */
 919                         fcport->last_queue_full = jiffies;
 920                         starget_for_each_device(cp->device->sdev_target,
 921                             fcport, qla2x00_adjust_sdev_qdepth_down);
 922                         break;
 923                 }
 924                 if (lscsi_status != SS_CHECK_CONDITION)
 925                         break;
 926
 927                 /* Copy Sense Data into sense buffer. */
 928                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 929
 930                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 931                         break;
 932
 933                 if (sense_len >= sizeof(cp->sense_buffer))
 934                         sense_len = sizeof(cp->sense_buffer);
 935
 936                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 937                 sp->request_sense_length = sense_len;
 938                 sp->request_sense_ptr = cp->sense_buffer;
 939
 940                 if (sp->request_sense_length > 32)
 941                         sense_len = 32;
 942
 943                 memcpy(cp->sense_buffer, sense_data, sense_len);
 944
 945                 sp->request_sense_ptr += sense_len;
 946                 sp->request_sense_length -= sense_len;
 947                 if (sp->request_sense_length != 0)
 948                         ha->status_srb = sp;
 949
 950                 DEBUG5(printk("%s(): Check condition Sense data, "
 951                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 952                     ha->host_no, cp->device->channel, cp->device->id,
 953                     cp->device->lun, cp, cp->serial_number));
 954                 if (sense_len)
 955                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 956                             CMD_ACTUAL_SNSLEN(cp)));
 957                 break;
 958
 959         case CS_DATA_UNDERRUN:
 960                 resid = resid_len;
 961                 /* Use F/W calculated residual length. */
 962                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 963                         resid = fw_resid_len;
 964
 965                 if (scsi_status & SS_RESIDUAL_UNDER) {
 966                         cp->resid = resid;
 967                         CMD_RESID_LEN(cp) = resid;
 968                 } else {
 969                         DEBUG2(printk(KERN_INFO
 970                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 971                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 972                             "os_underflow=0x%x\n", ha->host_no,
 973                             cp->device->id, cp->device->lun, comp_status,
 974                             scsi_status, resid_len, resid, cp->cmnd[0],
 975                             cp->underflow));
 976
 977                 }
 978
 979                 /*
 980                  * Check to see if SCSI Status is non zero. If so report SCSI
 981                  * Status.
 982                  */
 983                 if (lscsi_status != 0) {
 984                         cp->result = DID_OK << 16 | lscsi_status;
 985
 986                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 987                                 DEBUG2(printk(KERN_INFO
 988                                     "scsi(%ld): QUEUE FULL status detected "
 989                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
 990                                     scsi_status));
 991
 992                                 /*
 993                                  * Adjust queue depth for all luns on the
 994                                  * port.
 995                                  */
 996                                 fcport->last_queue_full = jiffies;
 997                                 starget_for_each_device(
 998                                     cp->device->sdev_target, fcport,
 999                                     qla2x00_adjust_sdev_qdepth_down);
1000                                 break;
1001                         }
1002                         if (lscsi_status != SS_CHECK_CONDITION)
1003                                 break;
1004
1005                         /* Copy Sense Data into sense buffer */
1006                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1007
1008                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1009                                 break;
1010
1011                         if (sense_len >= sizeof(cp->sense_buffer))
1012                                 sense_len = sizeof(cp->sense_buffer);
1013
1014                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1015                         sp->request_sense_length = sense_len;
1016                         sp->request_sense_ptr = cp->sense_buffer;
1017
1018                         if (sp->request_sense_length > 32)
1019                                 sense_len = 32;
1020
1021                         memcpy(cp->sense_buffer, sense_data, sense_len);
1022
1023                         sp->request_sense_ptr += sense_len;
1024                         sp->request_sense_length -= sense_len;
1025                         if (sp->request_sense_length != 0)
1026                                 ha->status_srb = sp;
1027
1028                         DEBUG5(printk("%s(): Check condition Sense data, "
1029                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1030                             __func__, ha->host_no, cp->device->channel,
1031                             cp->device->id, cp->device->lun, cp,
1032                             cp->serial_number));
1033
1034                         if (sense_len)
1035                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1036                                     CMD_ACTUAL_SNSLEN(cp)));
1037                 } else {
1038                         /*
1039                          * If RISC reports underrun and target does not report
1040                          * it then we must have a lost frame, so tell upper
1041                          * layer to retry it by reporting a bus busy.
1042                          */
1043                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1044                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1045                                     "frame(s) detected (%x of %x bytes)..."
1046                                     "retrying command.\n", ha->host_no,
1047                                     cp->device->channel, cp->device->id,
1048                                     cp->device->lun, resid,
1049                                     cp->request_bufflen));
1050
1051                                 cp->result = DID_BUS_BUSY << 16;
1052                                 break;
1053                         }
1054
1055                         /* Handle mid-layer underflow */
1056                         if ((unsigned)(cp->request_bufflen - resid) <
1057                             cp->underflow) {
1058                                 qla_printk(KERN_INFO, ha,
1059                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1060                                     "detected (%x of %x bytes)...returning "
1061                                     "error status.\n", ha->host_no,
1062                                     cp->device->channel, cp->device->id,
1063                                     cp->device->lun, resid,
1064                                     cp->request_bufflen);
1065
1066                                 cp->result = DID_ERROR << 16;
1067                                 break;
1068                         }
1069
1070                         /* Everybody online, looking good... */
1071                         cp->result = DID_OK << 16;
1072                 }
1073                 break;
1074
1075         case CS_DATA_OVERRUN:
1076                 DEBUG2(printk(KERN_INFO
1077                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1078                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1079                     scsi_status));
1080                 DEBUG2(printk(KERN_INFO
1081                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1082                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1083                     cp->cmnd[4], cp->cmnd[5]));
1084                 DEBUG2(printk(KERN_INFO
1085                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1086                     "status!\n",
1087                     cp->serial_number, cp->request_bufflen, resid_len));
1088
1089                 cp->result = DID_ERROR << 16;
1090                 break;
1091
1092         case CS_PORT_LOGGED_OUT:
1093         case CS_PORT_CONFIG_CHG:
1094         case CS_PORT_BUSY:
1095         case CS_INCOMPLETE:
1096         case CS_PORT_UNAVAILABLE:
1097                 /*
1098                  * If the port is in Target Down state, return all IOs for this
1099                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1100                  * retry_queue.
1101                  */
1102                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1103                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1104                     ha->host_no, cp->device->id, cp->device->lun,
1105                     cp->serial_number, comp_status,
1106                     atomic_read(&fcport->state)));
1107
1108                 cp->result = DID_BUS_BUSY << 16;
1109                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1110                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1111                 }
1112                 break;
1113
1114         case CS_RESET:
1115                 DEBUG2(printk(KERN_INFO
1116                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1117                     ha->host_no, comp_status, scsi_status));
1118
1119                 cp->result = DID_RESET << 16;
1120                 break;
1121
1122         case CS_ABORTED:
1123                 /*
1124                  * hv2.19.12 - DID_ABORT does not retry the request if we
1125                  * aborted this request then abort otherwise it must be a
1126                  * reset.
1127                  */
1128                 DEBUG2(printk(KERN_INFO
1129                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1130                     ha->host_no, comp_status, scsi_status));
1131
1132                 cp->result = DID_RESET << 16;
1133                 break;
1134
1135         case CS_TIMEOUT:
1136                 cp->result = DID_BUS_BUSY << 16;
1137
1138                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1139                         DEBUG2(printk(KERN_INFO
1140                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1141                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1142                             cp->device->id, cp->device->lun, comp_status,
1143                             scsi_status));
1144                         break;
1145                 }
1146                 DEBUG2(printk(KERN_INFO
1147                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1148                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1149                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1150                     le16_to_cpu(sts->status_flags)));
1151
1152                 /* Check to see if logout occurred. */
1153                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1154                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1155                 break;
1156
1157         default:
1158                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1159                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1160                 qla_printk(KERN_INFO, ha,
1161                     "Unknown status detected 0x%x-0x%x.\n",
1162                     comp_status, scsi_status);
1163
1164                 cp->result = DID_ERROR << 16;
1165                 break;
1166         }
1167
1168         /* Place command on done queue. */
1169         if (ha->status_srb == NULL)
1170                 qla2x00_sp_compl(ha, sp);
1171 }
1172
1173 /**
1174  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1175  * @ha: SCSI driver HA context
1176  * @pkt: Entry pointer
1177  *
1178  * Extended sense data.
1179  */
1180 static void
1181 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1182 {
1183         uint8_t         sense_sz = 0;
1184         srb_t           *sp = ha->status_srb;
1185         struct scsi_cmnd *cp;
1186
1187         if (sp != NULL && sp->request_sense_length != 0) {
1188                 cp = sp->cmd;
1189                 if (cp == NULL) {
1190                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1191                             "sp=%p.\n", __func__, sp));
1192                         qla_printk(KERN_INFO, ha,
1193                             "cmd is NULL: already returned to OS (sp=%p)\n",
1194                             sp);
1195
1196                         ha->status_srb = NULL;
1197                         return;
1198                 }
1199
1200                 if (sp->request_sense_length > sizeof(pkt->data)) {
1201                         sense_sz = sizeof(pkt->data);
1202                 } else {
1203                         sense_sz = sp->request_sense_length;
1204                 }
1205
1206                 /* Move sense data. */
1207                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1208                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1209                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1210                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1211
1212                 sp->request_sense_ptr += sense_sz;
1213                 sp->request_sense_length -= sense_sz;
1214
1215                 /* Place command on done queue. */
1216                 if (sp->request_sense_length == 0) {
1217                         ha->status_srb = NULL;
1218                         qla2x00_sp_compl(ha, sp);
1219                 }
1220         }
1221 }
1222
1223 /**
1224  * qla2x00_error_entry() - Process an error entry.
1225  * @ha: SCSI driver HA context
1226  * @pkt: Entry pointer
1227  */
1228 static void
1229 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1230 {
1231         srb_t *sp;
1232
1233 #if defined(QL_DEBUG_LEVEL_2)
1234         if (pkt->entry_status & RF_INV_E_ORDER)
1235                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1236         else if (pkt->entry_status & RF_INV_E_COUNT)
1237                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1238         else if (pkt->entry_status & RF_INV_E_PARAM)
1239                 qla_printk(KERN_ERR, ha,
1240                     "%s: Invalid Entry Parameter\n", __func__);
1241         else if (pkt->entry_status & RF_INV_E_TYPE)
1242                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1243         else if (pkt->entry_status & RF_BUSY)
1244                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1245         else
1246                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1247 #endif
1248
1249         /* Validate handle. */
1250         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1251                 sp = ha->outstanding_cmds[pkt->handle];
1252         else
1253                 sp = NULL;
1254
1255         if (sp) {
1256                 /* Free outstanding command slot. */
1257                 ha->outstanding_cmds[pkt->handle] = NULL;
1258
1259                 /* Bad payload or header */
1260                 if (pkt->entry_status &
1261                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1262                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1263                         sp->cmd->result = DID_ERROR << 16;
1264                 } else if (pkt->entry_status & RF_BUSY) {
1265                         sp->cmd->result = DID_BUS_BUSY << 16;
1266                 } else {
1267                         sp->cmd->result = DID_ERROR << 16;
1268                 }
1269                 qla2x00_sp_compl(ha, sp);
1270
1271         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1272             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1273                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1274                     ha->host_no));
1275                 qla_printk(KERN_WARNING, ha,
1276                     "Error entry - invalid handle\n");
1277
1278                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1279                 qla2xxx_wake_dpc(ha);
1280         }
1281 }
1282
1283 /**
1284  * qla2x00_ms_entry() - Process a Management Server entry.
1285  * @ha: SCSI driver HA context
1286  * @index: Response queue out pointer
1287  */
1288 static void
1289 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1290 {
1291         srb_t          *sp;
1292
1293         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1294             __func__, ha->host_no, pkt, pkt->handle1));
1295
1296         /* Validate handle. */
1297         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1298                 sp = ha->outstanding_cmds[pkt->handle1];
1299         else
1300                 sp = NULL;
1301
1302         if (sp == NULL) {
1303                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1304                     ha->host_no));
1305                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1306
1307                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1308                 return;
1309         }
1310
1311         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1312         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1313
1314         /* Free outstanding command slot. */
1315         ha->outstanding_cmds[pkt->handle1] = NULL;
1316
1317         qla2x00_sp_compl(ha, sp);
1318 }
1319
1320
1321 /**
1322  * qla24xx_mbx_completion() - Process mailbox command completions.
1323  * @ha: SCSI driver HA context
1324  * @mb0: Mailbox0 register
1325  */
1326 static void
1327 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1328 {
1329         uint16_t        cnt;
1330         uint16_t __iomem *wptr;
1331         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1332
1333         /* Load return mailbox registers. */
1334         ha->flags.mbox_int = 1;
1335         ha->mailbox_out[0] = mb0;
1336         wptr = (uint16_t __iomem *)&reg->mailbox1;
1337
1338         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1339                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1340                 wptr++;
1341         }
1342
1343         if (ha->mcp) {
1344                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1345                     __func__, ha->host_no, ha->mcp->mb[0]));
1346         } else {
1347                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1348                     __func__, ha->host_no));
1349         }
1350 }
1351
1352 /**
1353  * qla24xx_process_response_queue() - Process response queue entries.
1354  * @ha: SCSI driver HA context
1355  */
1356 void
1357 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1358 {
1359         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1360         struct sts_entry_24xx *pkt;
1361
1362         if (!ha->flags.online)
1363                 return;
1364
1365         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1366                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1367
1368                 ha->rsp_ring_index++;
1369                 if (ha->rsp_ring_index == ha->response_q_length) {
1370                         ha->rsp_ring_index = 0;
1371                         ha->response_ring_ptr = ha->response_ring;
1372                 } else {
1373                         ha->response_ring_ptr++;
1374                 }
1375
1376                 if (pkt->entry_status != 0) {
1377                         DEBUG3(printk(KERN_INFO
1378                             "scsi(%ld): Process error entry.\n", ha->host_no));
1379
1380                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1381                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1382                         wmb();
1383                         continue;
1384                 }
1385
1386                 switch (pkt->entry_type) {
1387                 case STATUS_TYPE:
1388                         qla2x00_status_entry(ha, pkt);
1389                         break;
1390                 case STATUS_CONT_TYPE:
1391                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1392                         break;
1393                 case MS_IOCB_TYPE:
1394                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1395                         break;
1396                 default:
1397                         /* Type Not Supported. */
1398                         DEBUG4(printk(KERN_WARNING
1399                             "scsi(%ld): Received unknown response pkt type %x "
1400                             "entry status=%x.\n",
1401                             ha->host_no, pkt->entry_type, pkt->entry_status));
1402                         break;
1403                 }
1404                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1405                 wmb();
1406         }
1407
1408         /* Adjust ring index */
1409         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1410 }
1411
1412 /**
1413  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1414  * @irq:
1415  * @dev_id: SCSI driver HA context
1416  *
1417  * Called by system whenever the host adapter generates an interrupt.
1418  *
1419  * Returns handled flag.
1420  */
1421 irqreturn_t
1422 qla24xx_intr_handler(int irq, void *dev_id)
1423 {
1424         scsi_qla_host_t *ha;
1425         struct device_reg_24xx __iomem *reg;
1426         int             status;
1427         unsigned long   flags;
1428         unsigned long   iter;
1429         uint32_t        stat;
1430         uint32_t        hccr;
1431         uint16_t        mb[4];
1432
1433         ha = (scsi_qla_host_t *) dev_id;
1434         if (!ha) {
1435                 printk(KERN_INFO
1436                     "%s(): NULL host pointer\n", __func__);
1437                 return IRQ_NONE;
1438         }
1439
1440         reg = &ha->iobase->isp24;
1441         status = 0;
1442
1443         spin_lock_irqsave(&ha->hardware_lock, flags);
1444         for (iter = 50; iter--; ) {
1445                 stat = RD_REG_DWORD(&reg->host_status);
1446                 if (stat & HSRX_RISC_PAUSED) {
1447                         hccr = RD_REG_DWORD(&reg->hccr);
1448
1449                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1450                             "Dumping firmware!\n", hccr);
1451                         ha->isp_ops.fw_dump(ha, 1);
1452                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1453                         break;
1454                 } else if ((stat & HSRX_RISC_INT) == 0)
1455                         break;
1456
1457                 switch (stat & 0xff) {
1458                 case 0x1:
1459                 case 0x2:
1460                 case 0x10:
1461                 case 0x11:
1462                         qla24xx_mbx_completion(ha, MSW(stat));
1463                         status |= MBX_INTERRUPT;
1464
1465                         break;
1466                 case 0x12:
1467                         mb[0] = MSW(stat);
1468                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1469                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1470                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1471                         qla2x00_async_event(ha, mb);
1472                         break;
1473                 case 0x13:
1474                         qla24xx_process_response_queue(ha);
1475                         break;
1476                 default:
1477                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1478                             "(%d).\n",
1479                             ha->host_no, stat & 0xff));
1480                         break;
1481                 }
1482                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1483                 RD_REG_DWORD_RELAXED(&reg->hccr);
1484         }
1485         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1486
1487         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1488             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1489                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1490                 up(&ha->mbx_intr_sem);
1491         }
1492
1493         return IRQ_HANDLED;
1494 }
1495
1496 /**
1497  * qla24xx_ms_entry() - Process a Management Server entry.
1498  * @ha: SCSI driver HA context
1499  * @index: Response queue out pointer
1500  */
1501 static void
1502 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1503 {
1504         srb_t          *sp;
1505
1506         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1507             __func__, ha->host_no, pkt, pkt->handle));
1508
1509         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1510         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1511
1512         /* Validate handle. */
1513         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1514                 sp = ha->outstanding_cmds[pkt->handle];
1515         else
1516                 sp = NULL;
1517
1518         if (sp == NULL) {
1519                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1520                     ha->host_no));
1521                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1522                     ha->host_no));
1523                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1524                     pkt->handle);
1525
1526                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1527                 return;
1528         }
1529
1530         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1531         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1532
1533         /* Free outstanding command slot. */
1534         ha->outstanding_cmds[pkt->handle] = NULL;
1535
1536         qla2x00_sp_compl(ha, sp);
1537 }
1538
1539 static irqreturn_t
1540 qla24xx_msix_rsp_q(int irq, void *dev_id)
1541 {
1542         scsi_qla_host_t *ha;
1543         struct device_reg_24xx __iomem *reg;
1544         unsigned long flags;
1545
1546         ha = dev_id;
1547         reg = &ha->iobase->isp24;
1548
1549         spin_lock_irqsave(&ha->hardware_lock, flags);
1550
1551         qla24xx_process_response_queue(ha);
1552
1553         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1554         RD_REG_DWORD_RELAXED(&reg->hccr);
1555
1556         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1557
1558         return IRQ_HANDLED;
1559 }
1560
1561 static irqreturn_t
1562 qla24xx_msix_default(int irq, void *dev_id)
1563 {
1564         scsi_qla_host_t *ha;
1565         struct device_reg_24xx __iomem *reg;
1566         int             status;
1567         unsigned long   flags;
1568         unsigned long   iter;
1569         uint32_t        stat;
1570         uint32_t        hccr;
1571         uint16_t        mb[4];
1572
1573         ha = dev_id;
1574         reg = &ha->iobase->isp24;
1575         status = 0;
1576
1577         spin_lock_irqsave(&ha->hardware_lock, flags);
1578         for (iter = 50; iter--; ) {
1579                 stat = RD_REG_DWORD(&reg->host_status);
1580                 if (stat & HSRX_RISC_PAUSED) {
1581                         hccr = RD_REG_DWORD(&reg->hccr);
1582
1583                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1584                             "Dumping firmware!\n", hccr);
1585                         ha->isp_ops.fw_dump(ha, 1);
1586                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1587                         break;
1588                 } else if ((stat & HSRX_RISC_INT) == 0)
1589                         break;
1590
1591                 switch (stat & 0xff) {
1592                 case 0x1:
1593                 case 0x2:
1594                 case 0x10:
1595                 case 0x11:
1596                         qla24xx_mbx_completion(ha, MSW(stat));
1597                         status |= MBX_INTERRUPT;
1598
1599                         break;
1600                 case 0x12:
1601                         mb[0] = MSW(stat);
1602                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1603                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1604                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1605                         qla2x00_async_event(ha, mb);
1606                         break;
1607                 case 0x13:
1608                         qla24xx_process_response_queue(ha);
1609                         break;
1610                 default:
1611                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1612                             "(%d).\n",
1613                             ha->host_no, stat & 0xff));
1614                         break;
1615                 }
1616                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1617                 RD_REG_DWORD_RELAXED(&reg->hccr);
1618         }
1619         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1620
1621         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1622             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1623                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1624                 up(&ha->mbx_intr_sem);
1625         }
1626
1627         return IRQ_HANDLED;
1628 }
1629
1630 /* Interrupt handling helpers. */
1631
1632 struct qla_init_msix_entry {
1633         uint16_t entry;
1634         uint16_t index;
1635         const char *name;
1636         irqreturn_t (*handler)(int, void *);
1637 };
1638
1639 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1640         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1641                 "qla2xxx (default)", qla24xx_msix_default },
1642
1643         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1644                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1645 };
1646
1647 static void
1648 qla24xx_disable_msix(scsi_qla_host_t *ha)
1649 {
1650         int i;
1651         struct qla_msix_entry *qentry;
1652
1653         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1654                 qentry = &ha->msix_entries[imsix_entries[i].index];
1655                 if (qentry->have_irq)
1656                         free_irq(qentry->msix_vector, ha);
1657         }
1658         pci_disable_msix(ha->pdev);
1659 }
1660
1661 static int
1662 qla24xx_enable_msix(scsi_qla_host_t *ha)
1663 {
1664         int i, ret;
1665         struct msix_entry entries[QLA_MSIX_ENTRIES];
1666         struct qla_msix_entry *qentry;
1667
1668         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1669                 entries[i].entry = imsix_entries[i].entry;
1670
1671         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1672         if (ret) {
1673                 qla_printk(KERN_WARNING, ha,
1674                     "MSI-X: Failed to enable support -- %d/%d\n",
1675                     QLA_MSIX_ENTRIES, ret);
1676                 goto msix_out;
1677         }
1678         ha->flags.msix_enabled = 1;
1679
1680         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1681                 qentry = &ha->msix_entries[imsix_entries[i].index];
1682                 qentry->msix_vector = entries[i].vector;
1683                 qentry->msix_entry = entries[i].entry;
1684                 qentry->have_irq = 0;
1685                 ret = request_irq(qentry->msix_vector,
1686                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1687                 if (ret) {
1688                         qla_printk(KERN_WARNING, ha,
1689                             "MSI-X: Unable to register handler -- %x/%d.\n",
1690                             imsix_entries[i].index, ret);
1691                         qla24xx_disable_msix(ha);
1692                         goto msix_out;
1693                 }
1694                 qentry->have_irq = 1;
1695         }
1696
1697 msix_out:
1698         return ret;
1699 }
1700
1701 int
1702 qla2x00_request_irqs(scsi_qla_host_t *ha)
1703 {
1704         int ret;
1705
1706         /* If possible, enable MSI-X. */
1707         if (!IS_QLA2432(ha))
1708                 goto skip_msix;
1709
1710         if (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1711             !QLA_MSIX_FW_MODE_1(ha->fw_attributes)) {
1712                 DEBUG2(qla_printk(KERN_WARNING, ha,
1713                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1714                     ha->chip_revision, ha->fw_attributes));
1715
1716                 goto skip_msix;
1717         }
1718
1719         ret = qla24xx_enable_msix(ha);
1720         if (!ret) {
1721                 DEBUG2(qla_printk(KERN_INFO, ha,
1722                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1723                     ha->fw_attributes));
1724                 return ret;
1725         }
1726         qla_printk(KERN_WARNING, ha,
1727             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1728 skip_msix:
1729         ret = request_irq(ha->pdev->irq, ha->isp_ops.intr_handler,
1730             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1731         if (!ret) {
1732                 ha->flags.inta_enabled = 1;
1733                 ha->host->irq = ha->pdev->irq;
1734         } else {
1735                 qla_printk(KERN_WARNING, ha,
1736                     "Failed to reserve interrupt %d already in use.\n",
1737                     ha->pdev->irq);
1738         }
1739
1740         return ret;
1741 }
1742
1743 void
1744 qla2x00_free_irqs(scsi_qla_host_t *ha)
1745 {
1746
1747         if (ha->flags.msix_enabled)
1748                 qla24xx_disable_msix(ha);
1749         else if (ha->flags.inta_enabled)
1750                 free_irq(ha->host->irq, ha);
1751 }