git.oblomov.eu Git - linux-2.6/blob - 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                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
  90
  91                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  92                 up(&ha->mbx_intr_sem);
  93
  94                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
  95         }
  96
  97         return (IRQ_HANDLED);
  98 }
  99
 100 /**
 101  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 102  * @irq:
 103  * @dev_id: SCSI driver HA context
 104  *
 105  * Called by system whenever the host adapter generates an interrupt.
 106  *
 107  * Returns handled flag.
 108  */
 109 irqreturn_t
 110 qla2300_intr_handler(int irq, void *dev_id)
 111 {
 112         scsi_qla_host_t *ha;
 113         struct device_reg_2xxx __iomem *reg;
 114         int             status;
 115         unsigned long   flags;
 116         unsigned long   iter;
 117         uint32_t        stat;
 118         uint16_t        hccr;
 119         uint16_t        mb[4];
 120
 121         ha = (scsi_qla_host_t *) dev_id;
 122         if (!ha) {
 123                 printk(KERN_INFO
 124                     "%s(): NULL host pointer\n", __func__);
 125                 return (IRQ_NONE);
 126         }
 127
 128         reg = &ha->iobase->isp;
 129         status = 0;
 130
 131         spin_lock_irqsave(&ha->hardware_lock, flags);
 132         for (iter = 50; iter--; ) {
 133                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 134                 if (stat & HSR_RISC_PAUSED) {
 135                         hccr = RD_REG_WORD(&reg->hccr);
 136                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 137                                 qla_printk(KERN_INFO, ha,
 138                                     "Parity error -- HCCR=%x.\n", hccr);
 139                         else
 140                                 qla_printk(KERN_INFO, ha,
 141                                     "RISC paused -- HCCR=%x.\n", hccr);
 142
 143                         /*
 144                          * Issue a "HARD" reset in order for the RISC
 145                          * interrupt bit to be cleared.  Schedule a big
 146                          * hammmer to get out of the RISC PAUSED state.
 147                          */
 148                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 149                         RD_REG_WORD(&reg->hccr);
 150                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 151                         break;
 152                 } else if ((stat & HSR_RISC_INT) == 0)
 153                         break;
 154
 155                 switch (stat & 0xff) {
 156                 case 0x1:
 157                 case 0x2:
 158                 case 0x10:
 159                 case 0x11:
 160                         qla2x00_mbx_completion(ha, MSW(stat));
 161                         status |= MBX_INTERRUPT;
 162
 163                         /* Release mailbox registers. */
 164                         WRT_REG_WORD(&reg->semaphore, 0);
 165                         break;
 166                 case 0x12:
 167                         mb[0] = MSW(stat);
 168                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 169                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 170                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 171                         qla2x00_async_event(ha, mb);
 172                         break;
 173                 case 0x13:
 174                         qla2x00_process_response_queue(ha);
 175                         break;
 176                 case 0x15:
 177                         mb[0] = MBA_CMPLT_1_16BIT;
 178                         mb[1] = MSW(stat);
 179                         qla2x00_async_event(ha, mb);
 180                         break;
 181                 case 0x16:
 182                         mb[0] = MBA_SCSI_COMPLETION;
 183                         mb[1] = MSW(stat);
 184                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 185                         qla2x00_async_event(ha, mb);
 186                         break;
 187                 default:
 188                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 189                             "(%d).\n",
 190                             ha->host_no, stat & 0xff));
 191                         break;
 192                 }
 193                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 194                 RD_REG_WORD_RELAXED(&reg->hccr);
 195         }
 196         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 197
 198         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 199             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 200                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
 201
 202                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 203                 up(&ha->mbx_intr_sem);
 204
 205                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
 206         }
 207
 208         return (IRQ_HANDLED);
 209 }
 210
 211 /**
 212  * qla2x00_mbx_completion() - Process mailbox command completions.
 213  * @ha: SCSI driver HA context
 214  * @mb0: Mailbox0 register
 215  */
 216 static void
 217 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 218 {
 219         uint16_t        cnt;
 220         uint16_t __iomem *wptr;
 221         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 222
 223         /* Load return mailbox registers. */
 224         ha->flags.mbox_int = 1;
 225         ha->mailbox_out[0] = mb0;
 226         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 227
 228         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 229                 if (IS_QLA2200(ha) && cnt == 8)
 230                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 231                 if (cnt == 4 || cnt == 5)
 232                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 233                 else
 234                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 235
 236                 wptr++;
 237         }
 238
 239         if (ha->mcp) {
 240                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 241                     __func__, ha->host_no, ha->mcp->mb[0]));
 242         } else {
 243                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 244                     __func__, ha->host_no));
 245         }
 246 }
 247
 248 /**
 249  * qla2x00_async_event() - Process aynchronous events.
 250  * @ha: SCSI driver HA context
 251  * @mb: Mailbox registers (0 - 3)
 252  */
 253 static void
 254 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 255 {
 256 #define LS_UNKNOWN      2
 257         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
 258         char            *link_speed;
 259         uint16_t        handle_cnt;
 260         uint16_t        cnt;
 261         uint32_t        handles[5];
 262         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 263         uint32_t        rscn_entry, host_pid;
 264         uint8_t         rscn_queue_index;
 265
 266         /* Setup to process RIO completion. */
 267         handle_cnt = 0;
 268         switch (mb[0]) {
 269         case MBA_SCSI_COMPLETION:
 270                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 271                 handle_cnt = 1;
 272                 break;
 273         case MBA_CMPLT_1_16BIT:
 274                 handles[0] = mb[1];
 275                 handle_cnt = 1;
 276                 mb[0] = MBA_SCSI_COMPLETION;
 277                 break;
 278         case MBA_CMPLT_2_16BIT:
 279                 handles[0] = mb[1];
 280                 handles[1] = mb[2];
 281                 handle_cnt = 2;
 282                 mb[0] = MBA_SCSI_COMPLETION;
 283                 break;
 284         case MBA_CMPLT_3_16BIT:
 285                 handles[0] = mb[1];
 286                 handles[1] = mb[2];
 287                 handles[2] = mb[3];
 288                 handle_cnt = 3;
 289                 mb[0] = MBA_SCSI_COMPLETION;
 290                 break;
 291         case MBA_CMPLT_4_16BIT:
 292                 handles[0] = mb[1];
 293                 handles[1] = mb[2];
 294                 handles[2] = mb[3];
 295                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 296                 handle_cnt = 4;
 297                 mb[0] = MBA_SCSI_COMPLETION;
 298                 break;
 299         case MBA_CMPLT_5_16BIT:
 300                 handles[0] = mb[1];
 301                 handles[1] = mb[2];
 302                 handles[2] = mb[3];
 303                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 304                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 305                 handle_cnt = 5;
 306                 mb[0] = MBA_SCSI_COMPLETION;
 307                 break;
 308         case MBA_CMPLT_2_32BIT:
 309                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 310                 handles[1] = le32_to_cpu(
 311                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 312                     RD_MAILBOX_REG(ha, reg, 6));
 313                 handle_cnt = 2;
 314                 mb[0] = MBA_SCSI_COMPLETION;
 315                 break;
 316         default:
 317                 break;
 318         }
 319
 320         switch (mb[0]) {
 321         case MBA_SCSI_COMPLETION:       /* Fast Post */
 322                 if (!ha->flags.online)
 323                         break;
 324
 325                 for (cnt = 0; cnt < handle_cnt; cnt++)
 326                         qla2x00_process_completed_request(ha, handles[cnt]);
 327                 break;
 328
 329         case MBA_RESET:                 /* Reset */
 330                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 331
 332                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 333                 break;
 334
 335         case MBA_SYSTEM_ERR:            /* System Error */
 336                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 337                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 338                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 339
 340                 qla_printk(KERN_INFO, ha,
 341                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 342                     mb[1], mb[2], mb[3]);
 343
 344                 ha->isp_ops.fw_dump(ha, 1);
 345
 346                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 347                         if (mb[1] == 0 && mb[2] == 0) {
 348                                 qla_printk(KERN_ERR, ha,
 349                                     "Unrecoverable Hardware Error: adapter "
 350                                     "marked OFFLINE!\n");
 351                                 ha->flags.online = 0;
 352                         } else
 353                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 354                 } else if (mb[1] == 0) {
 355                         qla_printk(KERN_INFO, ha,
 356                             "Unrecoverable Hardware Error: adapter marked "
 357                             "OFFLINE!\n");
 358                         ha->flags.online = 0;
 359                 } else
 360                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 361                 break;
 362
 363         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 364                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 365                     ha->host_no));
 366                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 367
 368                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 369                 break;
 370
 371         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 372                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 373                     ha->host_no));
 374                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 375
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 380                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 381                     ha->host_no));
 382                 break;
 383
 384         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 385                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 386                     mb[1]));
 387                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 388
 389                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 390                         atomic_set(&ha->loop_state, LOOP_DOWN);
 391                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 392                         qla2x00_mark_all_devices_lost(ha, 1);
 393                 }
 394
 395                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 396
 397                 ha->flags.management_server_logged_in = 0;
 398                 break;
 399
 400         case MBA_LOOP_UP:               /* Loop Up Event */
 401                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 402                         link_speed = link_speeds[0];
 403                         ha->link_data_rate = PORT_SPEED_1GB;
 404                 } else {
 405                         link_speed = link_speeds[LS_UNKNOWN];
 406                         if (mb[1] < 5)
 407                                 link_speed = link_speeds[mb[1]];
 408                         ha->link_data_rate = mb[1];
 409                 }
 410
 411                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 412                     ha->host_no, link_speed));
 413                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 414                     link_speed);
 415
 416                 ha->flags.management_server_logged_in = 0;
 417                 break;
 418
 419         case MBA_LOOP_DOWN:             /* Loop Down Event */
 420                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 421                     ha->host_no, mb[1]));
 422                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 423
 424                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 425                         atomic_set(&ha->loop_state, LOOP_DOWN);
 426                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 427                         ha->device_flags |= DFLG_NO_CABLE;
 428                         qla2x00_mark_all_devices_lost(ha, 1);
 429                 }
 430
 431                 ha->flags.management_server_logged_in = 0;
 432                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 433                 if (ql2xfdmienable)
 434                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 435                 break;
 436
 437         case MBA_LIP_RESET:             /* LIP reset occurred */
 438                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 439                     ha->host_no, mb[1]));
 440                 qla_printk(KERN_INFO, ha,
 441                     "LIP reset occured (%x).\n", mb[1]);
 442
 443                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 444                         atomic_set(&ha->loop_state, LOOP_DOWN);
 445                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 446                         qla2x00_mark_all_devices_lost(ha, 1);
 447                 }
 448
 449                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 450
 451                 ha->operating_mode = LOOP;
 452                 ha->flags.management_server_logged_in = 0;
 453                 break;
 454
 455         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 456                 if (IS_QLA2100(ha))
 457                         break;
 458
 459                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 460                     ha->host_no));
 461
 462                 /*
 463                  * Until there's a transition from loop down to loop up, treat
 464                  * this as loop down only.
 465                  */
 466                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 467                         atomic_set(&ha->loop_state, LOOP_DOWN);
 468                         if (!atomic_read(&ha->loop_down_timer))
 469                                 atomic_set(&ha->loop_down_timer,
 470                                     LOOP_DOWN_TIME);
 471                         qla2x00_mark_all_devices_lost(ha, 1);
 472                 }
 473
 474                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 475                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 476                 }
 477                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 478                 break;
 479
 480         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 481                 if (IS_QLA2100(ha))
 482                         break;
 483
 484                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 485                     "received.\n",
 486                     ha->host_no));
 487                 qla_printk(KERN_INFO, ha,
 488                     "Configuration change detected: value=%x.\n", mb[1]);
 489
 490                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 491                         atomic_set(&ha->loop_state, LOOP_DOWN);
 492                         if (!atomic_read(&ha->loop_down_timer))
 493                                 atomic_set(&ha->loop_down_timer,
 494                                     LOOP_DOWN_TIME);
 495                         qla2x00_mark_all_devices_lost(ha, 1);
 496                 }
 497
 498                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 499                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 500                 break;
 501
 502         case MBA_PORT_UPDATE:           /* Port database update */
 503                 /*
 504                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 505                  * event etc. earlier indicating loop is down) then process
 506                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 507                  */
 508                 atomic_set(&ha->loop_down_timer, 0);
 509                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 510                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 511                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 512                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 513                             mb[2], mb[3]));
 514                         break;
 515                 }
 516
 517                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 518                     ha->host_no));
 519                 DEBUG(printk(KERN_INFO
 520                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 521                     ha->host_no, mb[1], mb[2], mb[3]));
 522
 523                 /*
 524                  * Mark all devices as missing so we will login again.
 525                  */
 526                 atomic_set(&ha->loop_state, LOOP_UP);
 527
 528                 qla2x00_mark_all_devices_lost(ha, 1);
 529
 530                 ha->flags.rscn_queue_overflow = 1;
 531
 532                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 533                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 534                 break;
 535
 536         case MBA_RSCN_UPDATE:           /* State Change Registration */
 537                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 538                     ha->host_no));
 539                 DEBUG(printk(KERN_INFO
 540                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 541                     ha->host_no, mb[1], mb[2]));
 542
 543                 rscn_entry = (mb[1] << 16) | mb[2];
 544                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 545                     ha->d_id.b.al_pa;
 546                 if (rscn_entry == host_pid) {
 547                         DEBUG(printk(KERN_INFO
 548                             "scsi(%ld): Ignoring RSCN update to local host "
 549                             "port ID (%06x)\n",
 550                             ha->host_no, host_pid));
 551                         break;
 552                 }
 553
 554                 rscn_queue_index = ha->rscn_in_ptr + 1;
 555                 if (rscn_queue_index == MAX_RSCN_COUNT)
 556                         rscn_queue_index = 0;
 557                 if (rscn_queue_index != ha->rscn_out_ptr) {
 558                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 559                         ha->rscn_in_ptr = rscn_queue_index;
 560                 } else {
 561                         ha->flags.rscn_queue_overflow = 1;
 562                 }
 563
 564                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 565                 atomic_set(&ha->loop_down_timer, 0);
 566                 ha->flags.management_server_logged_in = 0;
 567
 568                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 569                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 570                 break;
 571
 572         /* case MBA_RIO_RESPONSE: */
 573         case MBA_ZIO_RESPONSE:
 574                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 575                     ha->host_no));
 576                 DEBUG(printk(KERN_INFO
 577                     "scsi(%ld): [R|Z]IO update completion.\n",
 578                     ha->host_no));
 579
 580                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 581                         qla24xx_process_response_queue(ha);
 582                 else
 583                         qla2x00_process_response_queue(ha);
 584                 break;
 585
 586         case MBA_DISCARD_RND_FRAME:
 587                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 588                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 589                 break;
 590
 591         case MBA_TRACE_NOTIFICATION:
 592                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 593                 ha->host_no, mb[1], mb[2]));
 594                 break;
 595         }
 596 }
 597
 598 static void
 599 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 600 {
 601         fc_port_t *fcport = data;
 602
 603         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 604                 return;
 605
 606         if (sdev->ordered_tags)
 607                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 608                     sdev->queue_depth + 1);
 609         else
 610                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 611                     sdev->queue_depth + 1);
 612
 613         fcport->last_ramp_up = jiffies;
 614
 615         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 616             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 617             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 618             sdev->queue_depth));
 619 }
 620
 621 static void
 622 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 623 {
 624         fc_port_t *fcport = data;
 625
 626         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 627                 return;
 628
 629         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 630             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 631             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 632             sdev->queue_depth));
 633 }
 634
 635 static inline void
 636 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 637 {
 638         fc_port_t *fcport;
 639         struct scsi_device *sdev;
 640
 641         sdev = sp->cmd->device;
 642         if (sdev->queue_depth >= ha->max_q_depth)
 643                 return;
 644
 645         fcport = sp->fcport;
 646         if (time_before(jiffies,
 647             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 648                 return;
 649         if (time_before(jiffies,
 650             fcport->last_queue_full + ql2xqfullrampup * HZ))
 651                 return;
 652
 653         starget_for_each_device(sdev->sdev_target, fcport,
 654             qla2x00_adjust_sdev_qdepth_up);
 655 }
 656
 657 /**
 658  * qla2x00_process_completed_request() - Process a Fast Post response.
 659  * @ha: SCSI driver HA context
 660  * @index: SRB index
 661  */
 662 static void
 663 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 664 {
 665         srb_t *sp;
 666
 667         /* Validate handle. */
 668         if (index >= MAX_OUTSTANDING_COMMANDS) {
 669                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 670                     ha->host_no, index));
 671                 qla_printk(KERN_WARNING, ha,
 672                     "Invalid SCSI completion handle %d.\n", index);
 673
 674                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 675                 return;
 676         }
 677
 678         sp = ha->outstanding_cmds[index];
 679         if (sp) {
 680                 /* Free outstanding command slot. */
 681                 ha->outstanding_cmds[index] = NULL;
 682
 683                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 684                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 685
 686                 /* Save ISP completion status */
 687                 sp->cmd->result = DID_OK << 16;
 688
 689                 qla2x00_ramp_up_queue_depth(ha, sp);
 690                 qla2x00_sp_compl(ha, sp);
 691         } else {
 692                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 693                     ha->host_no));
 694                 qla_printk(KERN_WARNING, ha,
 695                     "Invalid ISP SCSI completion handle\n");
 696
 697                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 698         }
 699 }
 700
 701 /**
 702  * qla2x00_process_response_queue() - Process response queue entries.
 703  * @ha: SCSI driver HA context
 704  */
 705 void
 706 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 707 {
 708         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 709         sts_entry_t     *pkt;
 710         uint16_t        handle_cnt;
 711         uint16_t        cnt;
 712
 713         if (!ha->flags.online)
 714                 return;
 715
 716         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 717                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 718
 719                 ha->rsp_ring_index++;
 720                 if (ha->rsp_ring_index == ha->response_q_length) {
 721                         ha->rsp_ring_index = 0;
 722                         ha->response_ring_ptr = ha->response_ring;
 723                 } else {
 724                         ha->response_ring_ptr++;
 725                 }
 726
 727                 if (pkt->entry_status != 0) {
 728                         DEBUG3(printk(KERN_INFO
 729                             "scsi(%ld): Process error entry.\n", ha->host_no));
 730
 731                         qla2x00_error_entry(ha, pkt);
 732                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 733                         wmb();
 734                         continue;
 735                 }
 736
 737                 switch (pkt->entry_type) {
 738                 case STATUS_TYPE:
 739                         qla2x00_status_entry(ha, pkt);
 740                         break;
 741                 case STATUS_TYPE_21:
 742                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 743                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 744                                 qla2x00_process_completed_request(ha,
 745                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 746                         }
 747                         break;
 748                 case STATUS_TYPE_22:
 749                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 750                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 751                                 qla2x00_process_completed_request(ha,
 752                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 753                         }
 754                         break;
 755                 case STATUS_CONT_TYPE:
 756                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 757                         break;
 758                 case MS_IOCB_TYPE:
 759                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 760                         break;
 761                 default:
 762                         /* Type Not Supported. */
 763                         DEBUG4(printk(KERN_WARNING
 764                             "scsi(%ld): Received unknown response pkt type %x "
 765                             "entry status=%x.\n",
 766                             ha->host_no, pkt->entry_type, pkt->entry_status));
 767                         break;
 768                 }
 769                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 770                 wmb();
 771         }
 772
 773         /* Adjust ring index */
 774         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 775 }
 776
 777 /**
 778  * qla2x00_status_entry() - Process a Status IOCB entry.
 779  * @ha: SCSI driver HA context
 780  * @pkt: Entry pointer
 781  */
 782 static void
 783 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 784 {
 785         srb_t           *sp;
 786         fc_port_t       *fcport;
 787         struct scsi_cmnd *cp;
 788         sts_entry_t *sts;
 789         struct sts_entry_24xx *sts24;
 790         uint16_t        comp_status;
 791         uint16_t        scsi_status;
 792         uint8_t         lscsi_status;
 793         int32_t         resid;
 794         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 795         uint8_t         *rsp_info, *sense_data;
 796
 797         sts = (sts_entry_t *) pkt;
 798         sts24 = (struct sts_entry_24xx *) pkt;
 799         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 800                 comp_status = le16_to_cpu(sts24->comp_status);
 801                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 802         } else {
 803                 comp_status = le16_to_cpu(sts->comp_status);
 804                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 805         }
 806
 807         /* Fast path completion. */
 808         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 809                 qla2x00_process_completed_request(ha, sts->handle);
 810
 811                 return;
 812         }
 813
 814         /* Validate handle. */
 815         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 816                 sp = ha->outstanding_cmds[sts->handle];
 817                 ha->outstanding_cmds[sts->handle] = NULL;
 818         } else
 819                 sp = NULL;
 820
 821         if (sp == NULL) {
 822                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 823                     ha->host_no));
 824                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 825
 826                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 827                 qla2xxx_wake_dpc(ha);
 828                 return;
 829         }
 830         cp = sp->cmd;
 831         if (cp == NULL) {
 832                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 833                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 834                 qla_printk(KERN_WARNING, ha,
 835                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 836
 837                 return;
 838         }
 839
 840         lscsi_status = scsi_status & STATUS_MASK;
 841         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 842         CMD_COMPL_STATUS(cp) = comp_status;
 843         CMD_SCSI_STATUS(cp) = scsi_status;
 844
 845         fcport = sp->fcport;
 846
 847         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 848         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 849                 sense_len = le32_to_cpu(sts24->sense_len);
 850                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 851                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 852                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 853                 rsp_info = sts24->data;
 854                 sense_data = sts24->data;
 855                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 856         } else {
 857                 sense_len = le16_to_cpu(sts->req_sense_length);
 858                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 859                 resid_len = le32_to_cpu(sts->residual_length);
 860                 rsp_info = sts->rsp_info;
 861                 sense_data = sts->req_sense_data;
 862         }
 863
 864         /* Check for any FCP transport errors. */
 865         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 866                 /* Sense data lies beyond any FCP RESPONSE data. */
 867                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 868                         sense_data += rsp_info_len;
 869                 if (rsp_info_len > 3 && rsp_info[3]) {
 870                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 871                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 872                             "retrying command\n", ha->host_no,
 873                             cp->device->channel, cp->device->id,
 874                             cp->device->lun, rsp_info_len, rsp_info[0],
 875                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 876                             rsp_info[5], rsp_info[6], rsp_info[7]));
 877
 878                         cp->result = DID_BUS_BUSY << 16;
 879                         qla2x00_sp_compl(ha, sp);
 880                         return;
 881                 }
 882         }
 883
 884         /*
 885          * Based on Host and scsi status generate status code for Linux
 886          */
 887         switch (comp_status) {
 888         case CS_COMPLETE:
 889         case CS_QUEUE_FULL:
 890                 if (scsi_status == 0) {
 891                         cp->result = DID_OK << 16;
 892                         break;
 893                 }
 894                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 895                         resid = resid_len;
 896                         cp->resid = resid;
 897                         CMD_RESID_LEN(cp) = resid;
 898
 899                         if (!lscsi_status &&
 900                             ((unsigned)(cp->request_bufflen - resid) <
 901                              cp->underflow)) {
 902                                 qla_printk(KERN_INFO, ha,
 903                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 904                                     "detected (%x of %x bytes)...returning "
 905                                     "error status.\n", ha->host_no,
 906                                     cp->device->channel, cp->device->id,
 907                                     cp->device->lun, resid,
 908                                     cp->request_bufflen);
 909
 910                                 cp->result = DID_ERROR << 16;
 911                                 break;
 912                         }
 913                 }
 914                 cp->result = DID_OK << 16 | lscsi_status;
 915
 916                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 917                         DEBUG2(printk(KERN_INFO
 918                             "scsi(%ld): QUEUE FULL status detected "
 919                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 920                             scsi_status));
 921
 922                         /* Adjust queue depth for all luns on the port. */
 923                         fcport->last_queue_full = jiffies;
 924                         starget_for_each_device(cp->device->sdev_target,
 925                             fcport, qla2x00_adjust_sdev_qdepth_down);
 926                         break;
 927                 }
 928                 if (lscsi_status != SS_CHECK_CONDITION)
 929                         break;
 930
 931                 /* Copy Sense Data into sense buffer. */
 932                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 933
 934                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 935                         break;
 936
 937                 if (sense_len >= sizeof(cp->sense_buffer))
 938                         sense_len = sizeof(cp->sense_buffer);
 939
 940                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 941                 sp->request_sense_length = sense_len;
 942                 sp->request_sense_ptr = cp->sense_buffer;
 943
 944                 if (sp->request_sense_length > 32)
 945                         sense_len = 32;
 946
 947                 memcpy(cp->sense_buffer, sense_data, sense_len);
 948
 949                 sp->request_sense_ptr += sense_len;
 950                 sp->request_sense_length -= sense_len;
 951                 if (sp->request_sense_length != 0)
 952                         ha->status_srb = sp;
 953
 954                 DEBUG5(printk("%s(): Check condition Sense data, "
 955                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 956                     ha->host_no, cp->device->channel, cp->device->id,
 957                     cp->device->lun, cp, cp->serial_number));
 958                 if (sense_len)
 959                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 960                             CMD_ACTUAL_SNSLEN(cp)));
 961                 break;
 962
 963         case CS_DATA_UNDERRUN:
 964                 resid = resid_len;
 965                 /* Use F/W calculated residual length. */
 966                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 967                         resid = fw_resid_len;
 968
 969                 if (scsi_status & SS_RESIDUAL_UNDER) {
 970                         cp->resid = resid;
 971                         CMD_RESID_LEN(cp) = resid;
 972                 } else {
 973                         DEBUG2(printk(KERN_INFO
 974                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 975                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 976                             "os_underflow=0x%x\n", ha->host_no,
 977                             cp->device->id, cp->device->lun, comp_status,
 978                             scsi_status, resid_len, resid, cp->cmnd[0],
 979                             cp->underflow));
 980
 981                 }
 982
 983                 /*
 984                  * Check to see if SCSI Status is non zero. If so report SCSI
 985                  * Status.
 986                  */
 987                 if (lscsi_status != 0) {
 988                         cp->result = DID_OK << 16 | lscsi_status;
 989
 990                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 991                                 DEBUG2(printk(KERN_INFO
 992                                     "scsi(%ld): QUEUE FULL status detected "
 993                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
 994                                     scsi_status));
 995
 996                                 /*
 997                                  * Adjust queue depth for all luns on the
 998                                  * port.
 999                                  */
1000                                 fcport->last_queue_full = jiffies;
1001                                 starget_for_each_device(
1002                                     cp->device->sdev_target, fcport,
1003                                     qla2x00_adjust_sdev_qdepth_down);
1004                                 break;
1005                         }
1006                         if (lscsi_status != SS_CHECK_CONDITION)
1007                                 break;
1008
1009                         /* Copy Sense Data into sense buffer */
1010                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1011
1012                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1013                                 break;
1014
1015                         if (sense_len >= sizeof(cp->sense_buffer))
1016                                 sense_len = sizeof(cp->sense_buffer);
1017
1018                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1019                         sp->request_sense_length = sense_len;
1020                         sp->request_sense_ptr = cp->sense_buffer;
1021
1022                         if (sp->request_sense_length > 32)
1023                                 sense_len = 32;
1024
1025                         memcpy(cp->sense_buffer, sense_data, sense_len);
1026
1027                         sp->request_sense_ptr += sense_len;
1028                         sp->request_sense_length -= sense_len;
1029                         if (sp->request_sense_length != 0)
1030                                 ha->status_srb = sp;
1031
1032                         DEBUG5(printk("%s(): Check condition Sense data, "
1033                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1034                             __func__, ha->host_no, cp->device->channel,
1035                             cp->device->id, cp->device->lun, cp,
1036                             cp->serial_number));
1037
1038                         if (sense_len)
1039                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1040                                     CMD_ACTUAL_SNSLEN(cp)));
1041                 } else {
1042                         /*
1043                          * If RISC reports underrun and target does not report
1044                          * it then we must have a lost frame, so tell upper
1045                          * layer to retry it by reporting a bus busy.
1046                          */
1047                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1048                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1049                                     "frame(s) detected (%x of %x bytes)..."
1050                                     "retrying command.\n", ha->host_no,
1051                                     cp->device->channel, cp->device->id,
1052                                     cp->device->lun, resid,
1053                                     cp->request_bufflen));
1054
1055                                 cp->result = DID_BUS_BUSY << 16;
1056                                 break;
1057                         }
1058
1059                         /* Handle mid-layer underflow */
1060                         if ((unsigned)(cp->request_bufflen - resid) <
1061                             cp->underflow) {
1062                                 qla_printk(KERN_INFO, ha,
1063                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1064                                     "detected (%x of %x bytes)...returning "
1065                                     "error status.\n", ha->host_no,
1066                                     cp->device->channel, cp->device->id,
1067                                     cp->device->lun, resid,
1068                                     cp->request_bufflen);
1069
1070                                 cp->result = DID_ERROR << 16;
1071                                 break;
1072                         }
1073
1074                         /* Everybody online, looking good... */
1075                         cp->result = DID_OK << 16;
1076                 }
1077                 break;
1078
1079         case CS_DATA_OVERRUN:
1080                 DEBUG2(printk(KERN_INFO
1081                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1082                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1083                     scsi_status));
1084                 DEBUG2(printk(KERN_INFO
1085                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1086                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1087                     cp->cmnd[4], cp->cmnd[5]));
1088                 DEBUG2(printk(KERN_INFO
1089                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1090                     "status!\n",
1091                     cp->serial_number, cp->request_bufflen, resid_len));
1092
1093                 cp->result = DID_ERROR << 16;
1094                 break;
1095
1096         case CS_PORT_LOGGED_OUT:
1097         case CS_PORT_CONFIG_CHG:
1098         case CS_PORT_BUSY:
1099         case CS_INCOMPLETE:
1100         case CS_PORT_UNAVAILABLE:
1101                 /*
1102                  * If the port is in Target Down state, return all IOs for this
1103                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1104                  * retry_queue.
1105                  */
1106                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1107                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1108                     ha->host_no, cp->device->id, cp->device->lun,
1109                     cp->serial_number, comp_status,
1110                     atomic_read(&fcport->state)));
1111
1112                 cp->result = DID_BUS_BUSY << 16;
1113                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1114                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1115                 }
1116                 break;
1117
1118         case CS_RESET:
1119                 DEBUG2(printk(KERN_INFO
1120                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1121                     ha->host_no, comp_status, scsi_status));
1122
1123                 cp->result = DID_RESET << 16;
1124                 break;
1125
1126         case CS_ABORTED:
1127                 /*
1128                  * hv2.19.12 - DID_ABORT does not retry the request if we
1129                  * aborted this request then abort otherwise it must be a
1130                  * reset.
1131                  */
1132                 DEBUG2(printk(KERN_INFO
1133                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1134                     ha->host_no, comp_status, scsi_status));
1135
1136                 cp->result = DID_RESET << 16;
1137                 break;
1138
1139         case CS_TIMEOUT:
1140                 cp->result = DID_BUS_BUSY << 16;
1141
1142                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1143                         DEBUG2(printk(KERN_INFO
1144                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1145                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1146                             cp->device->id, cp->device->lun, comp_status,
1147                             scsi_status));
1148                         break;
1149                 }
1150                 DEBUG2(printk(KERN_INFO
1151                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1152                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1153                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1154                     le16_to_cpu(sts->status_flags)));
1155
1156                 /* Check to see if logout occurred. */
1157                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1158                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1159                 break;
1160
1161         default:
1162                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1163                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1164                 qla_printk(KERN_INFO, ha,
1165                     "Unknown status detected 0x%x-0x%x.\n",
1166                     comp_status, scsi_status);
1167
1168                 cp->result = DID_ERROR << 16;
1169                 break;
1170         }
1171
1172         /* Place command on done queue. */
1173         if (ha->status_srb == NULL)
1174                 qla2x00_sp_compl(ha, sp);
1175 }
1176
1177 /**
1178  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1179  * @ha: SCSI driver HA context
1180  * @pkt: Entry pointer
1181  *
1182  * Extended sense data.
1183  */
1184 static void
1185 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1186 {
1187         uint8_t         sense_sz = 0;
1188         srb_t           *sp = ha->status_srb;
1189         struct scsi_cmnd *cp;
1190
1191         if (sp != NULL && sp->request_sense_length != 0) {
1192                 cp = sp->cmd;
1193                 if (cp == NULL) {
1194                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1195                             "sp=%p.\n", __func__, sp));
1196                         qla_printk(KERN_INFO, ha,
1197                             "cmd is NULL: already returned to OS (sp=%p)\n",
1198                             sp);
1199
1200                         ha->status_srb = NULL;
1201                         return;
1202                 }
1203
1204                 if (sp->request_sense_length > sizeof(pkt->data)) {
1205                         sense_sz = sizeof(pkt->data);
1206                 } else {
1207                         sense_sz = sp->request_sense_length;
1208                 }
1209
1210                 /* Move sense data. */
1211                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1212                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1213                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1214                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1215
1216                 sp->request_sense_ptr += sense_sz;
1217                 sp->request_sense_length -= sense_sz;
1218
1219                 /* Place command on done queue. */
1220                 if (sp->request_sense_length == 0) {
1221                         ha->status_srb = NULL;
1222                         qla2x00_sp_compl(ha, sp);
1223                 }
1224         }
1225 }
1226
1227 /**
1228  * qla2x00_error_entry() - Process an error entry.
1229  * @ha: SCSI driver HA context
1230  * @pkt: Entry pointer
1231  */
1232 static void
1233 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1234 {
1235         srb_t *sp;
1236
1237 #if defined(QL_DEBUG_LEVEL_2)
1238         if (pkt->entry_status & RF_INV_E_ORDER)
1239                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1240         else if (pkt->entry_status & RF_INV_E_COUNT)
1241                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1242         else if (pkt->entry_status & RF_INV_E_PARAM)
1243                 qla_printk(KERN_ERR, ha,
1244                     "%s: Invalid Entry Parameter\n", __func__);
1245         else if (pkt->entry_status & RF_INV_E_TYPE)
1246                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1247         else if (pkt->entry_status & RF_BUSY)
1248                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1249         else
1250                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1251 #endif
1252
1253         /* Validate handle. */
1254         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1255                 sp = ha->outstanding_cmds[pkt->handle];
1256         else
1257                 sp = NULL;
1258
1259         if (sp) {
1260                 /* Free outstanding command slot. */
1261                 ha->outstanding_cmds[pkt->handle] = NULL;
1262
1263                 /* Bad payload or header */
1264                 if (pkt->entry_status &
1265                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1266                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1267                         sp->cmd->result = DID_ERROR << 16;
1268                 } else if (pkt->entry_status & RF_BUSY) {
1269                         sp->cmd->result = DID_BUS_BUSY << 16;
1270                 } else {
1271                         sp->cmd->result = DID_ERROR << 16;
1272                 }
1273                 qla2x00_sp_compl(ha, sp);
1274
1275         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1276             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1277                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1278                     ha->host_no));
1279                 qla_printk(KERN_WARNING, ha,
1280                     "Error entry - invalid handle\n");
1281
1282                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1283                 qla2xxx_wake_dpc(ha);
1284         }
1285 }
1286
1287 /**
1288  * qla2x00_ms_entry() - Process a Management Server entry.
1289  * @ha: SCSI driver HA context
1290  * @index: Response queue out pointer
1291  */
1292 static void
1293 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1294 {
1295         srb_t          *sp;
1296
1297         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1298             __func__, ha->host_no, pkt, pkt->handle1));
1299
1300         /* Validate handle. */
1301         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1302                 sp = ha->outstanding_cmds[pkt->handle1];
1303         else
1304                 sp = NULL;
1305
1306         if (sp == NULL) {
1307                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1308                     ha->host_no));
1309                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1310
1311                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1312                 return;
1313         }
1314
1315         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1316         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1317
1318         /* Free outstanding command slot. */
1319         ha->outstanding_cmds[pkt->handle1] = NULL;
1320
1321         qla2x00_sp_compl(ha, sp);
1322 }
1323
1324
1325 /**
1326  * qla24xx_mbx_completion() - Process mailbox command completions.
1327  * @ha: SCSI driver HA context
1328  * @mb0: Mailbox0 register
1329  */
1330 static void
1331 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1332 {
1333         uint16_t        cnt;
1334         uint16_t __iomem *wptr;
1335         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1336
1337         /* Load return mailbox registers. */
1338         ha->flags.mbox_int = 1;
1339         ha->mailbox_out[0] = mb0;
1340         wptr = (uint16_t __iomem *)&reg->mailbox1;
1341
1342         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1343                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1344                 wptr++;
1345         }
1346
1347         if (ha->mcp) {
1348                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1349                     __func__, ha->host_no, ha->mcp->mb[0]));
1350         } else {
1351                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1352                     __func__, ha->host_no));
1353         }
1354 }
1355
1356 /**
1357  * qla24xx_process_response_queue() - Process response queue entries.
1358  * @ha: SCSI driver HA context
1359  */
1360 void
1361 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1362 {
1363         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1364         struct sts_entry_24xx *pkt;
1365
1366         if (!ha->flags.online)
1367                 return;
1368
1369         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1370                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1371
1372                 ha->rsp_ring_index++;
1373                 if (ha->rsp_ring_index == ha->response_q_length) {
1374                         ha->rsp_ring_index = 0;
1375                         ha->response_ring_ptr = ha->response_ring;
1376                 } else {
1377                         ha->response_ring_ptr++;
1378                 }
1379
1380                 if (pkt->entry_status != 0) {
1381                         DEBUG3(printk(KERN_INFO
1382                             "scsi(%ld): Process error entry.\n", ha->host_no));
1383
1384                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1385                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1386                         wmb();
1387                         continue;
1388                 }
1389
1390                 switch (pkt->entry_type) {
1391                 case STATUS_TYPE:
1392                         qla2x00_status_entry(ha, pkt);
1393                         break;
1394                 case STATUS_CONT_TYPE:
1395                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1396                         break;
1397                 case MS_IOCB_TYPE:
1398                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1399                         break;
1400                 default:
1401                         /* Type Not Supported. */
1402                         DEBUG4(printk(KERN_WARNING
1403                             "scsi(%ld): Received unknown response pkt type %x "
1404                             "entry status=%x.\n",
1405                             ha->host_no, pkt->entry_type, pkt->entry_status));
1406                         break;
1407                 }
1408                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1409                 wmb();
1410         }
1411
1412         /* Adjust ring index */
1413         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1414 }
1415
1416 /**
1417  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1418  * @irq:
1419  * @dev_id: SCSI driver HA context
1420  *
1421  * Called by system whenever the host adapter generates an interrupt.
1422  *
1423  * Returns handled flag.
1424  */
1425 irqreturn_t
1426 qla24xx_intr_handler(int irq, void *dev_id)
1427 {
1428         scsi_qla_host_t *ha;
1429         struct device_reg_24xx __iomem *reg;
1430         int             status;
1431         unsigned long   flags;
1432         unsigned long   iter;
1433         uint32_t        stat;
1434         uint32_t        hccr;
1435         uint16_t        mb[4];
1436
1437         ha = (scsi_qla_host_t *) dev_id;
1438         if (!ha) {
1439                 printk(KERN_INFO
1440                     "%s(): NULL host pointer\n", __func__);
1441                 return IRQ_NONE;
1442         }
1443
1444         reg = &ha->iobase->isp24;
1445         status = 0;
1446
1447         spin_lock_irqsave(&ha->hardware_lock, flags);
1448         for (iter = 50; iter--; ) {
1449                 stat = RD_REG_DWORD(&reg->host_status);
1450                 if (stat & HSRX_RISC_PAUSED) {
1451                         hccr = RD_REG_DWORD(&reg->hccr);
1452
1453                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1454                             "Dumping firmware!\n", hccr);
1455                         qla24xx_fw_dump(ha, 1);
1456
1457                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1458                         break;
1459                 } else if ((stat & HSRX_RISC_INT) == 0)
1460                         break;
1461
1462                 switch (stat & 0xff) {
1463                 case 0x1:
1464                 case 0x2:
1465                 case 0x10:
1466                 case 0x11:
1467                         qla24xx_mbx_completion(ha, MSW(stat));
1468                         status |= MBX_INTERRUPT;
1469
1470                         break;
1471                 case 0x12:
1472                         mb[0] = MSW(stat);
1473                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1474                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1475                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1476                         qla2x00_async_event(ha, mb);
1477                         break;
1478                 case 0x13:
1479                         qla24xx_process_response_queue(ha);
1480                         break;
1481                 default:
1482                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1483                             "(%d).\n",
1484                             ha->host_no, stat & 0xff));
1485                         break;
1486                 }
1487                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1488                 RD_REG_DWORD_RELAXED(&reg->hccr);
1489         }
1490         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1491
1492         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1493             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1494                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1495
1496                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1497                 up(&ha->mbx_intr_sem);
1498
1499                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1500         }
1501
1502         return IRQ_HANDLED;
1503 }
1504
1505 /**
1506  * qla24xx_ms_entry() - Process a Management Server entry.
1507  * @ha: SCSI driver HA context
1508  * @index: Response queue out pointer
1509  */
1510 static void
1511 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1512 {
1513         srb_t          *sp;
1514
1515         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1516             __func__, ha->host_no, pkt, pkt->handle));
1517
1518         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1519         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1520
1521         /* Validate handle. */
1522         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1523                 sp = ha->outstanding_cmds[pkt->handle];
1524         else
1525                 sp = NULL;
1526
1527         if (sp == NULL) {
1528                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1529                     ha->host_no));
1530                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1531                     ha->host_no));
1532                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1533                     pkt->handle);
1534
1535                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1536                 return;
1537         }
1538
1539         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1540         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1541
1542         /* Free outstanding command slot. */
1543         ha->outstanding_cmds[pkt->handle] = NULL;
1544
1545         qla2x00_sp_compl(ha, sp);
1546 }
1547
1548 static irqreturn_t
1549 qla24xx_msix_rsp_q(int irq, void *dev_id)
1550 {
1551         scsi_qla_host_t *ha;
1552         struct device_reg_24xx __iomem *reg;
1553         unsigned long flags;
1554
1555         ha = dev_id;
1556         reg = &ha->iobase->isp24;
1557
1558         spin_lock_irqsave(&ha->hardware_lock, flags);
1559
1560         qla24xx_process_response_queue(ha);
1561
1562         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1563         RD_REG_DWORD_RELAXED(&reg->hccr);
1564
1565         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1566
1567         return IRQ_HANDLED;
1568 }
1569
1570 static irqreturn_t
1571 qla24xx_msix_default(int irq, void *dev_id)
1572 {
1573         scsi_qla_host_t *ha;
1574         struct device_reg_24xx __iomem *reg;
1575         int             status;
1576         unsigned long   flags;
1577         unsigned long   iter;
1578         uint32_t        stat;
1579         uint32_t        hccr;
1580         uint16_t        mb[4];
1581
1582         ha = dev_id;
1583         reg = &ha->iobase->isp24;
1584         status = 0;
1585
1586         spin_lock_irqsave(&ha->hardware_lock, flags);
1587         for (iter = 50; iter--; ) {
1588                 stat = RD_REG_DWORD(&reg->host_status);
1589                 if (stat & HSRX_RISC_PAUSED) {
1590                         hccr = RD_REG_DWORD(&reg->hccr);
1591
1592                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1593                             "Dumping firmware!\n", hccr);
1594                         ha->isp_ops.fw_dump(ha, 1);
1595                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1596                         break;
1597                 } else if ((stat & HSRX_RISC_INT) == 0)
1598                         break;
1599
1600                 switch (stat & 0xff) {
1601                 case 0x1:
1602                 case 0x2:
1603                 case 0x10:
1604                 case 0x11:
1605                         qla24xx_mbx_completion(ha, MSW(stat));
1606                         status |= MBX_INTERRUPT;
1607
1608                         break;
1609                 case 0x12:
1610                         mb[0] = MSW(stat);
1611                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1612                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1613                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1614                         qla2x00_async_event(ha, mb);
1615                         break;
1616                 case 0x13:
1617                         qla24xx_process_response_queue(ha);
1618                         break;
1619                 default:
1620                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1621                             "(%d).\n",
1622                             ha->host_no, stat & 0xff));
1623                         break;
1624                 }
1625                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1626                 RD_REG_DWORD_RELAXED(&reg->hccr);
1627         }
1628         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1629
1630         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1631             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1632                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1633
1634                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1635                 up(&ha->mbx_intr_sem);
1636
1637                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1638         }
1639
1640         return IRQ_HANDLED;
1641 }
1642
1643 /* Interrupt handling helpers. */
1644
1645 struct qla_init_msix_entry {
1646         uint16_t entry;
1647         uint16_t index;
1648         const char *name;
1649         irqreturn_t (*handler)(int, void *);
1650 };
1651
1652 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1653         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1654                 "qla2xxx (default)", qla24xx_msix_default },
1655
1656         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1657                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1658 };
1659
1660 static void
1661 qla24xx_disable_msix(scsi_qla_host_t *ha)
1662 {
1663         int i;
1664         struct qla_msix_entry *qentry;
1665
1666         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1667                 qentry = &ha->msix_entries[imsix_entries[i].index];
1668                 if (qentry->have_irq)
1669                         free_irq(qentry->msix_vector, ha);
1670         }
1671         pci_disable_msix(ha->pdev);
1672 }
1673
1674 static int
1675 qla24xx_enable_msix(scsi_qla_host_t *ha)
1676 {
1677         int i, ret;
1678         struct msix_entry entries[QLA_MSIX_ENTRIES];
1679         struct qla_msix_entry *qentry;
1680
1681         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1682                 entries[i].entry = imsix_entries[i].entry;
1683
1684         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1685         if (ret) {
1686                 qla_printk(KERN_WARNING, ha,
1687                     "MSI-X: Failed to enable support -- %d/%d\n",
1688                     QLA_MSIX_ENTRIES, ret);
1689                 goto msix_out;
1690         }
1691         ha->flags.msix_enabled = 1;
1692
1693         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1694                 qentry = &ha->msix_entries[imsix_entries[i].index];
1695                 qentry->msix_vector = entries[i].vector;
1696                 qentry->msix_entry = entries[i].entry;
1697                 qentry->have_irq = 0;
1698                 ret = request_irq(qentry->msix_vector,
1699                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1700                 if (ret) {
1701                         qla_printk(KERN_WARNING, ha,
1702                             "MSI-X: Unable to register handler -- %x/%d.\n",
1703                             imsix_entries[i].index, ret);
1704                         qla24xx_disable_msix(ha);
1705                         goto msix_out;
1706                 }
1707                 qentry->have_irq = 1;
1708         }
1709
1710 msix_out:
1711         return ret;
1712 }
1713
1714 int
1715 qla2x00_request_irqs(scsi_qla_host_t *ha)
1716 {
1717         int ret;
1718
1719         /* If possible, enable MSI-X. */
1720         if (!IS_QLA2432(ha))
1721                 goto skip_msix;
1722
1723         if (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1724             !QLA_MSIX_FW_MODE_1(ha->fw_attributes)) {
1725                 DEBUG2(qla_printk(KERN_WARNING, ha,
1726                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1727                     ha->chip_revision, ha->fw_attributes));
1728
1729                 goto skip_msix;
1730         }
1731
1732         ret = qla24xx_enable_msix(ha);
1733         if (!ret) {
1734                 DEBUG2(qla_printk(KERN_INFO, ha,
1735                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1736                     ha->fw_attributes));
1737                 return ret;
1738         }
1739         qla_printk(KERN_WARNING, ha,
1740             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1741 skip_msix:
1742         ret = request_irq(ha->pdev->irq, ha->isp_ops.intr_handler,
1743             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1744         if (!ret) {
1745                 ha->flags.inta_enabled = 1;
1746                 ha->host->irq = ha->pdev->irq;
1747         } else {
1748                 qla_printk(KERN_WARNING, ha,
1749                     "Failed to reserve interrupt %d already in use.\n",
1750                     ha->pdev->irq);
1751         }
1752
1753         return ret;
1754 }
1755
1756 void
1757 qla2x00_free_irqs(scsi_qla_host_t *ha)
1758 {
1759
1760         if (ha->flags.msix_enabled)
1761                 qla24xx_disable_msix(ha);
1762         else if (ha->flags.inta_enabled)
1763                 free_irq(ha->host->irq, ha);
1764 }