err.no Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/delay.h>
  10 #include <scsi/scsi_tcq.h>
  11
  12 static void qla2x00_mbx_completion(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   iter;
  37         uint16_t        hccr;
  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(&ha->hardware_lock);
  51         for (iter = 50; iter--; ) {
  52                 hccr = RD_REG_WORD(&reg->hccr);
  53                 if (hccr & HCCR_RISC_PAUSE) {
  54                         if (pci_channel_offline(ha->pdev))
  55                                 break;
  56
  57                         /*
  58                          * Issue a "HARD" reset in order for the RISC interrupt
  59                          * bit to be cleared.  Schedule a big hammmer to get
  60                          * out of the RISC PAUSED state.
  61                          */
  62                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  63                         RD_REG_WORD(&reg->hccr);
  64
  65                         ha->isp_ops->fw_dump(ha, 1);
  66                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  67                         break;
  68                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  69                         break;
  70
  71                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  72                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  73                         RD_REG_WORD(&reg->hccr);
  74
  75                         /* Get mailbox data. */
  76                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  77                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  78                                 qla2x00_mbx_completion(ha, mb[0]);
  79                                 status |= MBX_INTERRUPT;
  80                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  81                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  82                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  83                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  84                                 qla2x00_async_event(ha, mb);
  85                         } else {
  86                                 /*EMPTY*/
  87                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  88                                     "interrupt type (%d).\n",
  89                                     ha->host_no, mb[0]));
  90                         }
  91                         /* Release mailbox registers. */
  92                         WRT_REG_WORD(&reg->semaphore, 0);
  93                         RD_REG_WORD(&reg->semaphore);
  94                 } else {
  95                         qla2x00_process_response_queue(ha);
  96
  97                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  98                         RD_REG_WORD(&reg->hccr);
  99                 }
 100         }
 101         spin_unlock(&ha->hardware_lock);
 102
 103         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 104             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 105                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 106                 complete(&ha->mbx_intr_comp);
 107         }
 108
 109         return (IRQ_HANDLED);
 110 }
 111
 112 /**
 113  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 114  * @irq:
 115  * @dev_id: SCSI driver HA context
 116  *
 117  * Called by system whenever the host adapter generates an interrupt.
 118  *
 119  * Returns handled flag.
 120  */
 121 irqreturn_t
 122 qla2300_intr_handler(int irq, void *dev_id)
 123 {
 124         scsi_qla_host_t *ha;
 125         struct device_reg_2xxx __iomem *reg;
 126         int             status;
 127         unsigned long   iter;
 128         uint32_t        stat;
 129         uint16_t        hccr;
 130         uint16_t        mb[4];
 131
 132         ha = (scsi_qla_host_t *) dev_id;
 133         if (!ha) {
 134                 printk(KERN_INFO
 135                     "%s(): NULL host pointer\n", __func__);
 136                 return (IRQ_NONE);
 137         }
 138
 139         reg = &ha->iobase->isp;
 140         status = 0;
 141
 142         spin_lock(&ha->hardware_lock);
 143         for (iter = 50; iter--; ) {
 144                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 145                 if (stat & HSR_RISC_PAUSED) {
 146                         if (pci_channel_offline(ha->pdev))
 147                                 break;
 148
 149                         hccr = RD_REG_WORD(&reg->hccr);
 150                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 151                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 152                                     "HCCR=%x, Dumping firmware!\n", hccr);
 153                         else
 154                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 155                                     "HCCR=%x, Dumping firmware!\n", hccr);
 156
 157                         /*
 158                          * Issue a "HARD" reset in order for the RISC
 159                          * interrupt bit to be cleared.  Schedule a big
 160                          * hammmer to get out of the RISC PAUSED state.
 161                          */
 162                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 163                         RD_REG_WORD(&reg->hccr);
 164
 165                         ha->isp_ops->fw_dump(ha, 1);
 166                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 167                         break;
 168                 } else if ((stat & HSR_RISC_INT) == 0)
 169                         break;
 170
 171                 switch (stat & 0xff) {
 172                 case 0x1:
 173                 case 0x2:
 174                 case 0x10:
 175                 case 0x11:
 176                         qla2x00_mbx_completion(ha, MSW(stat));
 177                         status |= MBX_INTERRUPT;
 178
 179                         /* Release mailbox registers. */
 180                         WRT_REG_WORD(&reg->semaphore, 0);
 181                         break;
 182                 case 0x12:
 183                         mb[0] = MSW(stat);
 184                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 185                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 186                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 187                         qla2x00_async_event(ha, mb);
 188                         break;
 189                 case 0x13:
 190                         qla2x00_process_response_queue(ha);
 191                         break;
 192                 case 0x15:
 193                         mb[0] = MBA_CMPLT_1_16BIT;
 194                         mb[1] = MSW(stat);
 195                         qla2x00_async_event(ha, mb);
 196                         break;
 197                 case 0x16:
 198                         mb[0] = MBA_SCSI_COMPLETION;
 199                         mb[1] = MSW(stat);
 200                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 201                         qla2x00_async_event(ha, mb);
 202                         break;
 203                 default:
 204                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 205                             "(%d).\n",
 206                             ha->host_no, stat & 0xff));
 207                         break;
 208                 }
 209                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 210                 RD_REG_WORD_RELAXED(&reg->hccr);
 211         }
 212         spin_unlock(&ha->hardware_lock);
 213
 214         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 215             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 216                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 217                 complete(&ha->mbx_intr_comp);
 218         }
 219
 220         return (IRQ_HANDLED);
 221 }
 222
 223 /**
 224  * qla2x00_mbx_completion() - Process mailbox command completions.
 225  * @ha: SCSI driver HA context
 226  * @mb0: Mailbox0 register
 227  */
 228 static void
 229 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 230 {
 231         uint16_t        cnt;
 232         uint16_t __iomem *wptr;
 233         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 234
 235         /* Load return mailbox registers. */
 236         ha->flags.mbox_int = 1;
 237         ha->mailbox_out[0] = mb0;
 238         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 239
 240         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 241                 if (IS_QLA2200(ha) && cnt == 8)
 242                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 243                 if (cnt == 4 || cnt == 5)
 244                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 245                 else
 246                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 247
 248                 wptr++;
 249         }
 250
 251         if (ha->mcp) {
 252                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 253                     __func__, ha->host_no, ha->mcp->mb[0]));
 254         } else {
 255                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 256                     __func__, ha->host_no));
 257         }
 258 }
 259
 260 /**
 261  * qla2x00_async_event() - Process aynchronous events.
 262  * @ha: SCSI driver HA context
 263  * @mb: Mailbox registers (0 - 3)
 264  */
 265 void
 266 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 267 {
 268 #define LS_UNKNOWN      2
 269         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 270         char            *link_speed;
 271         uint16_t        handle_cnt;
 272         uint16_t        cnt;
 273         uint32_t        handles[5];
 274         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 275         uint32_t        rscn_entry, host_pid;
 276         uint8_t         rscn_queue_index;
 277
 278         /* Setup to process RIO completion. */
 279         handle_cnt = 0;
 280         switch (mb[0]) {
 281         case MBA_SCSI_COMPLETION:
 282                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 283                 handle_cnt = 1;
 284                 break;
 285         case MBA_CMPLT_1_16BIT:
 286                 handles[0] = mb[1];
 287                 handle_cnt = 1;
 288                 mb[0] = MBA_SCSI_COMPLETION;
 289                 break;
 290         case MBA_CMPLT_2_16BIT:
 291                 handles[0] = mb[1];
 292                 handles[1] = mb[2];
 293                 handle_cnt = 2;
 294                 mb[0] = MBA_SCSI_COMPLETION;
 295                 break;
 296         case MBA_CMPLT_3_16BIT:
 297                 handles[0] = mb[1];
 298                 handles[1] = mb[2];
 299                 handles[2] = mb[3];
 300                 handle_cnt = 3;
 301                 mb[0] = MBA_SCSI_COMPLETION;
 302                 break;
 303         case MBA_CMPLT_4_16BIT:
 304                 handles[0] = mb[1];
 305                 handles[1] = mb[2];
 306                 handles[2] = mb[3];
 307                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 308                 handle_cnt = 4;
 309                 mb[0] = MBA_SCSI_COMPLETION;
 310                 break;
 311         case MBA_CMPLT_5_16BIT:
 312                 handles[0] = mb[1];
 313                 handles[1] = mb[2];
 314                 handles[2] = mb[3];
 315                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 316                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 317                 handle_cnt = 5;
 318                 mb[0] = MBA_SCSI_COMPLETION;
 319                 break;
 320         case MBA_CMPLT_2_32BIT:
 321                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 322                 handles[1] = le32_to_cpu(
 323                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 324                     RD_MAILBOX_REG(ha, reg, 6));
 325                 handle_cnt = 2;
 326                 mb[0] = MBA_SCSI_COMPLETION;
 327                 break;
 328         default:
 329                 break;
 330         }
 331
 332         switch (mb[0]) {
 333         case MBA_SCSI_COMPLETION:       /* Fast Post */
 334                 if (!ha->flags.online)
 335                         break;
 336
 337                 for (cnt = 0; cnt < handle_cnt; cnt++)
 338                         qla2x00_process_completed_request(ha, handles[cnt]);
 339                 break;
 340
 341         case MBA_RESET:                 /* Reset */
 342                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 343
 344                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 345                 break;
 346
 347         case MBA_SYSTEM_ERR:            /* System Error */
 348                 qla_printk(KERN_INFO, ha,
 349                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 350                     mb[1], mb[2], mb[3]);
 351
 352                 ha->isp_ops->fw_dump(ha, 1);
 353
 354                 if (IS_FWI2_CAPABLE(ha)) {
 355                         if (mb[1] == 0 && mb[2] == 0) {
 356                                 qla_printk(KERN_ERR, ha,
 357                                     "Unrecoverable Hardware Error: adapter "
 358                                     "marked OFFLINE!\n");
 359                                 ha->flags.online = 0;
 360                         } else
 361                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 362                 } else if (mb[1] == 0) {
 363                         qla_printk(KERN_INFO, ha,
 364                             "Unrecoverable Hardware Error: adapter marked "
 365                             "OFFLINE!\n");
 366                         ha->flags.online = 0;
 367                 } else
 368                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 369                 break;
 370
 371         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 372                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 373                     ha->host_no));
 374                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 375
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 380                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 381                     ha->host_no));
 382                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 383
 384                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 385                 break;
 386
 387         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 388                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 389                     ha->host_no));
 390                 break;
 391
 392         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 393                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 394                     mb[1]));
 395                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 396
 397                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 398                         atomic_set(&ha->loop_state, LOOP_DOWN);
 399                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 400                         qla2x00_mark_all_devices_lost(ha, 1);
 401                 }
 402
 403                 if (ha->parent) {
 404                         atomic_set(&ha->vp_state, VP_FAILED);
 405                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 406                 }
 407
 408                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 409
 410                 ha->flags.management_server_logged_in = 0;
 411                 break;
 412
 413         case MBA_LOOP_UP:               /* Loop Up Event */
 414                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 415                         link_speed = link_speeds[0];
 416                         ha->link_data_rate = PORT_SPEED_1GB;
 417                 } else {
 418                         link_speed = link_speeds[LS_UNKNOWN];
 419                         if (mb[1] < 5)
 420                                 link_speed = link_speeds[mb[1]];
 421                         ha->link_data_rate = mb[1];
 422                 }
 423
 424                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 425                     ha->host_no, link_speed));
 426                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 427                     link_speed);
 428
 429                 ha->flags.management_server_logged_in = 0;
 430                 break;
 431
 432         case MBA_LOOP_DOWN:             /* Loop Down Event */
 433                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 434                     ha->host_no, mb[1]));
 435                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%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                         ha->device_flags |= DFLG_NO_CABLE;
 441                         qla2x00_mark_all_devices_lost(ha, 1);
 442                 }
 443
 444                 if (ha->parent) {
 445                         atomic_set(&ha->vp_state, VP_FAILED);
 446                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 447                 }
 448
 449                 ha->flags.management_server_logged_in = 0;
 450                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 451                 if (ql2xfdmienable)
 452                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 453                 break;
 454
 455         case MBA_LIP_RESET:             /* LIP reset occurred */
 456                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 457                     ha->host_no, mb[1]));
 458                 qla_printk(KERN_INFO, ha,
 459                     "LIP reset occured (%x).\n", mb[1]);
 460
 461                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 462                         atomic_set(&ha->loop_state, LOOP_DOWN);
 463                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 464                         qla2x00_mark_all_devices_lost(ha, 1);
 465                 }
 466
 467                 if (ha->parent) {
 468                         atomic_set(&ha->vp_state, VP_FAILED);
 469                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 470                 }
 471
 472                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 473
 474                 ha->operating_mode = LOOP;
 475                 ha->flags.management_server_logged_in = 0;
 476                 break;
 477
 478         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 479                 if (IS_QLA2100(ha))
 480                         break;
 481
 482                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 483                     ha->host_no));
 484
 485                 /*
 486                  * Until there's a transition from loop down to loop up, treat
 487                  * this as loop down only.
 488                  */
 489                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 490                         atomic_set(&ha->loop_state, LOOP_DOWN);
 491                         if (!atomic_read(&ha->loop_down_timer))
 492                                 atomic_set(&ha->loop_down_timer,
 493                                     LOOP_DOWN_TIME);
 494                         qla2x00_mark_all_devices_lost(ha, 1);
 495                 }
 496
 497                 if (ha->parent) {
 498                         atomic_set(&ha->vp_state, VP_FAILED);
 499                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 500                 }
 501
 502                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 503                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 504                 }
 505                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 506
 507                 ha->flags.gpsc_supported = 1;
 508                 ha->flags.management_server_logged_in = 0;
 509                 break;
 510
 511         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 512                 if (IS_QLA2100(ha))
 513                         break;
 514
 515                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 516                     "received.\n",
 517                     ha->host_no));
 518                 qla_printk(KERN_INFO, ha,
 519                     "Configuration change detected: value=%x.\n", mb[1]);
 520
 521                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 522                         atomic_set(&ha->loop_state, LOOP_DOWN);
 523                         if (!atomic_read(&ha->loop_down_timer))
 524                                 atomic_set(&ha->loop_down_timer,
 525                                     LOOP_DOWN_TIME);
 526                         qla2x00_mark_all_devices_lost(ha, 1);
 527                 }
 528
 529                 if (ha->parent) {
 530                         atomic_set(&ha->vp_state, VP_FAILED);
 531                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 532                 }
 533
 534                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 535                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 536                 break;
 537
 538         case MBA_PORT_UPDATE:           /* Port database update */
 539                 /*
 540                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 541                  * event etc. earlier indicating loop is down) then process
 542                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 543                  */
 544                 atomic_set(&ha->loop_down_timer, 0);
 545                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 546                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 547                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 548                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 549                             mb[2], mb[3]));
 550                         break;
 551                 }
 552
 553                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 554                     ha->host_no));
 555                 DEBUG(printk(KERN_INFO
 556                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 557                     ha->host_no, mb[1], mb[2], mb[3]));
 558
 559                 /*
 560                  * Mark all devices as missing so we will login again.
 561                  */
 562                 atomic_set(&ha->loop_state, LOOP_UP);
 563
 564                 qla2x00_mark_all_devices_lost(ha, 1);
 565
 566                 ha->flags.rscn_queue_overflow = 1;
 567
 568                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 569                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 570                 break;
 571
 572         case MBA_RSCN_UPDATE:           /* State Change Registration */
 573                 /* Check if the Vport has issued a SCR */
 574                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 575                         break;
 576                 /* Only handle SCNs for our Vport index. */
 577                 if (ha->flags.npiv_supported && ha->vp_idx != mb[3])
 578                         break;
 579
 580                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 581                     ha->host_no));
 582                 DEBUG(printk(KERN_INFO
 583                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 584                     ha->host_no, mb[1], mb[2], mb[3]));
 585
 586                 rscn_entry = (mb[1] << 16) | mb[2];
 587                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 588                     ha->d_id.b.al_pa;
 589                 if (rscn_entry == host_pid) {
 590                         DEBUG(printk(KERN_INFO
 591                             "scsi(%ld): Ignoring RSCN update to local host "
 592                             "port ID (%06x)\n",
 593                             ha->host_no, host_pid));
 594                         break;
 595                 }
 596
 597                 rscn_queue_index = ha->rscn_in_ptr + 1;
 598                 if (rscn_queue_index == MAX_RSCN_COUNT)
 599                         rscn_queue_index = 0;
 600                 if (rscn_queue_index != ha->rscn_out_ptr) {
 601                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 602                         ha->rscn_in_ptr = rscn_queue_index;
 603                 } else {
 604                         ha->flags.rscn_queue_overflow = 1;
 605                 }
 606
 607                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 608                 atomic_set(&ha->loop_down_timer, 0);
 609                 ha->flags.management_server_logged_in = 0;
 610
 611                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 612                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 613                 break;
 614
 615         /* case MBA_RIO_RESPONSE: */
 616         case MBA_ZIO_RESPONSE:
 617                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 618                     ha->host_no));
 619                 DEBUG(printk(KERN_INFO
 620                     "scsi(%ld): [R|Z]IO update completion.\n",
 621                     ha->host_no));
 622
 623                 if (IS_FWI2_CAPABLE(ha))
 624                         qla24xx_process_response_queue(ha);
 625                 else
 626                         qla2x00_process_response_queue(ha);
 627                 break;
 628
 629         case MBA_DISCARD_RND_FRAME:
 630                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 631                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 632                 break;
 633
 634         case MBA_TRACE_NOTIFICATION:
 635                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 636                 ha->host_no, mb[1], mb[2]));
 637                 break;
 638         }
 639
 640         if (!ha->parent && ha->num_vhosts)
 641                 qla2x00_alert_all_vps(ha, mb);
 642 }
 643
 644 static void
 645 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 646 {
 647         fc_port_t *fcport = data;
 648
 649         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 650                 return;
 651
 652         if (sdev->ordered_tags)
 653                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 654                     sdev->queue_depth + 1);
 655         else
 656                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 657                     sdev->queue_depth + 1);
 658
 659         fcport->last_ramp_up = jiffies;
 660
 661         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 662             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 663             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 664             sdev->queue_depth));
 665 }
 666
 667 static void
 668 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 669 {
 670         fc_port_t *fcport = data;
 671
 672         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 673                 return;
 674
 675         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 676             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 677             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 678             sdev->queue_depth));
 679 }
 680
 681 static inline void
 682 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 683 {
 684         fc_port_t *fcport;
 685         struct scsi_device *sdev;
 686
 687         sdev = sp->cmd->device;
 688         if (sdev->queue_depth >= ha->max_q_depth)
 689                 return;
 690
 691         fcport = sp->fcport;
 692         if (time_before(jiffies,
 693             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 694                 return;
 695         if (time_before(jiffies,
 696             fcport->last_queue_full + ql2xqfullrampup * HZ))
 697                 return;
 698
 699         starget_for_each_device(sdev->sdev_target, fcport,
 700             qla2x00_adjust_sdev_qdepth_up);
 701 }
 702
 703 /**
 704  * qla2x00_process_completed_request() - Process a Fast Post response.
 705  * @ha: SCSI driver HA context
 706  * @index: SRB index
 707  */
 708 static void
 709 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 710 {
 711         srb_t *sp;
 712
 713         /* Validate handle. */
 714         if (index >= MAX_OUTSTANDING_COMMANDS) {
 715                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 716                     ha->host_no, index));
 717                 qla_printk(KERN_WARNING, ha,
 718                     "Invalid SCSI completion handle %d.\n", index);
 719
 720                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 721                 return;
 722         }
 723
 724         sp = ha->outstanding_cmds[index];
 725         if (sp) {
 726                 /* Free outstanding command slot. */
 727                 ha->outstanding_cmds[index] = NULL;
 728
 729                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 730                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 731
 732                 /* Save ISP completion status */
 733                 sp->cmd->result = DID_OK << 16;
 734
 735                 qla2x00_ramp_up_queue_depth(ha, sp);
 736                 qla2x00_sp_compl(ha, sp);
 737         } else {
 738                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 739                     ha->host_no));
 740                 qla_printk(KERN_WARNING, ha,
 741                     "Invalid ISP SCSI completion handle\n");
 742
 743                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 744         }
 745 }
 746
 747 /**
 748  * qla2x00_process_response_queue() - Process response queue entries.
 749  * @ha: SCSI driver HA context
 750  */
 751 void
 752 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 753 {
 754         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 755         sts_entry_t     *pkt;
 756         uint16_t        handle_cnt;
 757         uint16_t        cnt;
 758
 759         if (!ha->flags.online)
 760                 return;
 761
 762         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 763                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 764
 765                 ha->rsp_ring_index++;
 766                 if (ha->rsp_ring_index == ha->response_q_length) {
 767                         ha->rsp_ring_index = 0;
 768                         ha->response_ring_ptr = ha->response_ring;
 769                 } else {
 770                         ha->response_ring_ptr++;
 771                 }
 772
 773                 if (pkt->entry_status != 0) {
 774                         DEBUG3(printk(KERN_INFO
 775                             "scsi(%ld): Process error entry.\n", ha->host_no));
 776
 777                         qla2x00_error_entry(ha, pkt);
 778                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 779                         wmb();
 780                         continue;
 781                 }
 782
 783                 switch (pkt->entry_type) {
 784                 case STATUS_TYPE:
 785                         qla2x00_status_entry(ha, pkt);
 786                         break;
 787                 case STATUS_TYPE_21:
 788                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 789                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 790                                 qla2x00_process_completed_request(ha,
 791                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 792                         }
 793                         break;
 794                 case STATUS_TYPE_22:
 795                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 796                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 797                                 qla2x00_process_completed_request(ha,
 798                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 799                         }
 800                         break;
 801                 case STATUS_CONT_TYPE:
 802                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 803                         break;
 804                 case MS_IOCB_TYPE:
 805                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 806                         break;
 807                 default:
 808                         /* Type Not Supported. */
 809                         DEBUG4(printk(KERN_WARNING
 810                             "scsi(%ld): Received unknown response pkt type %x "
 811                             "entry status=%x.\n",
 812                             ha->host_no, pkt->entry_type, pkt->entry_status));
 813                         break;
 814                 }
 815                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 816                 wmb();
 817         }
 818
 819         /* Adjust ring index */
 820         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 821 }
 822
 823 static inline void
 824 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 825 {
 826         struct scsi_cmnd *cp = sp->cmd;
 827
 828         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 829                 sense_len = SCSI_SENSE_BUFFERSIZE;
 830
 831         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 832         sp->request_sense_length = sense_len;
 833         sp->request_sense_ptr = cp->sense_buffer;
 834         if (sp->request_sense_length > 32)
 835                 sense_len = 32;
 836
 837         memcpy(cp->sense_buffer, sense_data, sense_len);
 838
 839         sp->request_sense_ptr += sense_len;
 840         sp->request_sense_length -= sense_len;
 841         if (sp->request_sense_length != 0)
 842                 sp->ha->status_srb = sp;
 843
 844         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 845             "cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
 846             cp->device->id, cp->device->lun, cp, cp->serial_number));
 847         if (sense_len)
 848                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 849                     CMD_ACTUAL_SNSLEN(cp)));
 850 }
 851
 852 /**
 853  * qla2x00_status_entry() - Process a Status IOCB entry.
 854  * @ha: SCSI driver HA context
 855  * @pkt: Entry pointer
 856  */
 857 static void
 858 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 859 {
 860         srb_t           *sp;
 861         fc_port_t       *fcport;
 862         struct scsi_cmnd *cp;
 863         sts_entry_t *sts;
 864         struct sts_entry_24xx *sts24;
 865         uint16_t        comp_status;
 866         uint16_t        scsi_status;
 867         uint8_t         lscsi_status;
 868         int32_t         resid;
 869         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 870         uint8_t         *rsp_info, *sense_data;
 871
 872         sts = (sts_entry_t *) pkt;
 873         sts24 = (struct sts_entry_24xx *) pkt;
 874         if (IS_FWI2_CAPABLE(ha)) {
 875                 comp_status = le16_to_cpu(sts24->comp_status);
 876                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 877         } else {
 878                 comp_status = le16_to_cpu(sts->comp_status);
 879                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 880         }
 881
 882         /* Fast path completion. */
 883         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 884                 qla2x00_process_completed_request(ha, sts->handle);
 885
 886                 return;
 887         }
 888
 889         /* Validate handle. */
 890         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 891                 sp = ha->outstanding_cmds[sts->handle];
 892                 ha->outstanding_cmds[sts->handle] = NULL;
 893         } else
 894                 sp = NULL;
 895
 896         if (sp == NULL) {
 897                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 898                     ha->host_no));
 899                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 900
 901                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 902                 qla2xxx_wake_dpc(ha);
 903                 return;
 904         }
 905         cp = sp->cmd;
 906         if (cp == NULL) {
 907                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 908                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 909                 qla_printk(KERN_WARNING, ha,
 910                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 911
 912                 return;
 913         }
 914
 915         lscsi_status = scsi_status & STATUS_MASK;
 916         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 917         CMD_COMPL_STATUS(cp) = comp_status;
 918         CMD_SCSI_STATUS(cp) = scsi_status;
 919
 920         fcport = sp->fcport;
 921
 922         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 923         if (IS_FWI2_CAPABLE(ha)) {
 924                 sense_len = le32_to_cpu(sts24->sense_len);
 925                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 926                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 927                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 928                 rsp_info = sts24->data;
 929                 sense_data = sts24->data;
 930                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 931         } else {
 932                 sense_len = le16_to_cpu(sts->req_sense_length);
 933                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 934                 resid_len = le32_to_cpu(sts->residual_length);
 935                 rsp_info = sts->rsp_info;
 936                 sense_data = sts->req_sense_data;
 937         }
 938
 939         /* Check for any FCP transport errors. */
 940         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 941                 /* Sense data lies beyond any FCP RESPONSE data. */
 942                 if (IS_FWI2_CAPABLE(ha))
 943                         sense_data += rsp_info_len;
 944                 if (rsp_info_len > 3 && rsp_info[3]) {
 945                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 946                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 947                             "retrying command\n", ha->host_no,
 948                             cp->device->channel, cp->device->id,
 949                             cp->device->lun, rsp_info_len, rsp_info[0],
 950                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 951                             rsp_info[5], rsp_info[6], rsp_info[7]));
 952
 953                         cp->result = DID_BUS_BUSY << 16;
 954                         qla2x00_sp_compl(ha, sp);
 955                         return;
 956                 }
 957         }
 958
 959         /* Check for overrun. */
 960         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
 961             scsi_status & SS_RESIDUAL_OVER)
 962                 comp_status = CS_DATA_OVERRUN;
 963
 964         /*
 965          * Based on Host and scsi status generate status code for Linux
 966          */
 967         switch (comp_status) {
 968         case CS_COMPLETE:
 969         case CS_QUEUE_FULL:
 970                 if (scsi_status == 0) {
 971                         cp->result = DID_OK << 16;
 972                         break;
 973                 }
 974                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 975                         resid = resid_len;
 976                         scsi_set_resid(cp, resid);
 977                         CMD_RESID_LEN(cp) = resid;
 978
 979                         if (!lscsi_status &&
 980                             ((unsigned)(scsi_bufflen(cp) - resid) <
 981                              cp->underflow)) {
 982                                 qla_printk(KERN_INFO, ha,
 983                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 984                                            "detected (%x of %x bytes)...returning "
 985                                            "error status.\n", ha->host_no,
 986                                            cp->device->channel, cp->device->id,
 987                                            cp->device->lun, resid,
 988                                            scsi_bufflen(cp));
 989
 990                                 cp->result = DID_ERROR << 16;
 991                                 break;
 992                         }
 993                 }
 994                 cp->result = DID_OK << 16 | lscsi_status;
 995
 996                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 997                         DEBUG2(printk(KERN_INFO
 998                             "scsi(%ld): QUEUE FULL status detected "
 999                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1000                             scsi_status));
1001
1002                         /* Adjust queue depth for all luns on the port. */
1003                         fcport->last_queue_full = jiffies;
1004                         starget_for_each_device(cp->device->sdev_target,
1005                             fcport, qla2x00_adjust_sdev_qdepth_down);
1006                         break;
1007                 }
1008                 if (lscsi_status != SS_CHECK_CONDITION)
1009                         break;
1010
1011                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1012                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1013                         break;
1014
1015                 qla2x00_handle_sense(sp, sense_data, sense_len);
1016                 break;
1017
1018         case CS_DATA_UNDERRUN:
1019                 resid = resid_len;
1020                 /* Use F/W calculated residual length. */
1021                 if (IS_FWI2_CAPABLE(ha)) {
1022                         if (scsi_status & SS_RESIDUAL_UNDER &&
1023                             resid != fw_resid_len) {
1024                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1025                                 lscsi_status = 0;
1026                         }
1027                         resid = fw_resid_len;
1028                 }
1029
1030                 if (scsi_status & SS_RESIDUAL_UNDER) {
1031                         scsi_set_resid(cp, resid);
1032                         CMD_RESID_LEN(cp) = resid;
1033                 } else {
1034                         DEBUG2(printk(KERN_INFO
1035                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1036                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1037                             "os_underflow=0x%x\n", ha->host_no,
1038                             cp->device->id, cp->device->lun, comp_status,
1039                             scsi_status, resid_len, resid, cp->cmnd[0],
1040                             cp->underflow));
1041
1042                 }
1043
1044                 /*
1045                  * Check to see if SCSI Status is non zero. If so report SCSI
1046                  * Status.
1047                  */
1048                 if (lscsi_status != 0) {
1049                         cp->result = DID_OK << 16 | lscsi_status;
1050
1051                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1052                                 DEBUG2(printk(KERN_INFO
1053                                     "scsi(%ld): QUEUE FULL status detected "
1054                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1055                                     scsi_status));
1056
1057                                 /*
1058                                  * Adjust queue depth for all luns on the
1059                                  * port.
1060                                  */
1061                                 fcport->last_queue_full = jiffies;
1062                                 starget_for_each_device(
1063                                     cp->device->sdev_target, fcport,
1064                                     qla2x00_adjust_sdev_qdepth_down);
1065                                 break;
1066                         }
1067                         if (lscsi_status != SS_CHECK_CONDITION)
1068                                 break;
1069
1070                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1071                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1072                                 break;
1073
1074                         qla2x00_handle_sense(sp, sense_data, sense_len);
1075
1076                         /*
1077                          * In case of a Underrun condition, set both the lscsi
1078                          * status and the completion status to appropriate
1079                          * values.
1080                          */
1081                         if (resid &&
1082                             ((unsigned)(scsi_bufflen(cp) - resid) <
1083                              cp->underflow)) {
1084                                 DEBUG2(qla_printk(KERN_INFO, ha,
1085                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1086                                     "detected (%x of %x bytes)...returning "
1087                                     "error status.\n", ha->host_no,
1088                                     cp->device->channel, cp->device->id,
1089                                     cp->device->lun, resid,
1090                                     scsi_bufflen(cp)));
1091
1092                                 cp->result = DID_ERROR << 16 | lscsi_status;
1093                         }
1094                 } else {
1095                         /*
1096                          * If RISC reports underrun and target does not report
1097                          * it then we must have a lost frame, so tell upper
1098                          * layer to retry it by reporting a bus busy.
1099                          */
1100                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1101                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1102                                               "frame(s) detected (%x of %x bytes)..."
1103                                               "retrying command.\n", ha->host_no,
1104                                               cp->device->channel, cp->device->id,
1105                                               cp->device->lun, resid,
1106                                               scsi_bufflen(cp)));
1107
1108                                 cp->result = DID_BUS_BUSY << 16;
1109                                 break;
1110                         }
1111
1112                         /* Handle mid-layer underflow */
1113                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1114                             cp->underflow) {
1115                                 qla_printk(KERN_INFO, ha,
1116                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1117                                            "detected (%x of %x bytes)...returning "
1118                                            "error status.\n", ha->host_no,
1119                                            cp->device->channel, cp->device->id,
1120                                            cp->device->lun, resid,
1121                                            scsi_bufflen(cp));
1122
1123                                 cp->result = DID_ERROR << 16;
1124                                 break;
1125                         }
1126
1127                         /* Everybody online, looking good... */
1128                         cp->result = DID_OK << 16;
1129                 }
1130                 break;
1131
1132         case CS_DATA_OVERRUN:
1133                 DEBUG2(printk(KERN_INFO
1134                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1135                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1136                     scsi_status));
1137                 DEBUG2(printk(KERN_INFO
1138                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1139                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1140                     cp->cmnd[4], cp->cmnd[5]));
1141                 DEBUG2(printk(KERN_INFO
1142                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1143                     "status!\n",
1144                     cp->serial_number, scsi_bufflen(cp), resid_len));
1145
1146                 cp->result = DID_ERROR << 16;
1147                 break;
1148
1149         case CS_PORT_LOGGED_OUT:
1150         case CS_PORT_CONFIG_CHG:
1151         case CS_PORT_BUSY:
1152         case CS_INCOMPLETE:
1153         case CS_PORT_UNAVAILABLE:
1154                 /*
1155                  * If the port is in Target Down state, return all IOs for this
1156                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1157                  * retry_queue.
1158                  */
1159                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1160                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1161                     ha->host_no, cp->device->id, cp->device->lun,
1162                     cp->serial_number, comp_status,
1163                     atomic_read(&fcport->state)));
1164
1165                 cp->result = DID_BUS_BUSY << 16;
1166                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1167                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1168                 }
1169                 break;
1170
1171         case CS_RESET:
1172                 DEBUG2(printk(KERN_INFO
1173                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1174                     ha->host_no, comp_status, scsi_status));
1175
1176                 cp->result = DID_RESET << 16;
1177                 break;
1178
1179         case CS_ABORTED:
1180                 /*
1181                  * hv2.19.12 - DID_ABORT does not retry the request if we
1182                  * aborted this request then abort otherwise it must be a
1183                  * reset.
1184                  */
1185                 DEBUG2(printk(KERN_INFO
1186                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1187                     ha->host_no, comp_status, scsi_status));
1188
1189                 cp->result = DID_RESET << 16;
1190                 break;
1191
1192         case CS_TIMEOUT:
1193                 cp->result = DID_BUS_BUSY << 16;
1194
1195                 if (IS_FWI2_CAPABLE(ha)) {
1196                         DEBUG2(printk(KERN_INFO
1197                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1198                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1199                             cp->device->id, cp->device->lun, comp_status,
1200                             scsi_status));
1201                         break;
1202                 }
1203                 DEBUG2(printk(KERN_INFO
1204                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1205                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1206                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1207                     le16_to_cpu(sts->status_flags)));
1208
1209                 /* Check to see if logout occurred. */
1210                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1211                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1212                 break;
1213
1214         default:
1215                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1216                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1217                 qla_printk(KERN_INFO, ha,
1218                     "Unknown status detected 0x%x-0x%x.\n",
1219                     comp_status, scsi_status);
1220
1221                 cp->result = DID_ERROR << 16;
1222                 break;
1223         }
1224
1225         /* Place command on done queue. */
1226         if (ha->status_srb == NULL)
1227                 qla2x00_sp_compl(ha, sp);
1228 }
1229
1230 /**
1231  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1232  * @ha: SCSI driver HA context
1233  * @pkt: Entry pointer
1234  *
1235  * Extended sense data.
1236  */
1237 static void
1238 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1239 {
1240         uint8_t         sense_sz = 0;
1241         srb_t           *sp = ha->status_srb;
1242         struct scsi_cmnd *cp;
1243
1244         if (sp != NULL && sp->request_sense_length != 0) {
1245                 cp = sp->cmd;
1246                 if (cp == NULL) {
1247                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1248                             "sp=%p.\n", __func__, sp));
1249                         qla_printk(KERN_INFO, ha,
1250                             "cmd is NULL: already returned to OS (sp=%p)\n",
1251                             sp);
1252
1253                         ha->status_srb = NULL;
1254                         return;
1255                 }
1256
1257                 if (sp->request_sense_length > sizeof(pkt->data)) {
1258                         sense_sz = sizeof(pkt->data);
1259                 } else {
1260                         sense_sz = sp->request_sense_length;
1261                 }
1262
1263                 /* Move sense data. */
1264                 if (IS_FWI2_CAPABLE(ha))
1265                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1266                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1267                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1268
1269                 sp->request_sense_ptr += sense_sz;
1270                 sp->request_sense_length -= sense_sz;
1271
1272                 /* Place command on done queue. */
1273                 if (sp->request_sense_length == 0) {
1274                         ha->status_srb = NULL;
1275                         qla2x00_sp_compl(ha, sp);
1276                 }
1277         }
1278 }
1279
1280 /**
1281  * qla2x00_error_entry() - Process an error entry.
1282  * @ha: SCSI driver HA context
1283  * @pkt: Entry pointer
1284  */
1285 static void
1286 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1287 {
1288         srb_t *sp;
1289
1290 #if defined(QL_DEBUG_LEVEL_2)
1291         if (pkt->entry_status & RF_INV_E_ORDER)
1292                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1293         else if (pkt->entry_status & RF_INV_E_COUNT)
1294                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1295         else if (pkt->entry_status & RF_INV_E_PARAM)
1296                 qla_printk(KERN_ERR, ha,
1297                     "%s: Invalid Entry Parameter\n", __func__);
1298         else if (pkt->entry_status & RF_INV_E_TYPE)
1299                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1300         else if (pkt->entry_status & RF_BUSY)
1301                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1302         else
1303                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1304 #endif
1305
1306         /* Validate handle. */
1307         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1308                 sp = ha->outstanding_cmds[pkt->handle];
1309         else
1310                 sp = NULL;
1311
1312         if (sp) {
1313                 /* Free outstanding command slot. */
1314                 ha->outstanding_cmds[pkt->handle] = NULL;
1315
1316                 /* Bad payload or header */
1317                 if (pkt->entry_status &
1318                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1319                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1320                         sp->cmd->result = DID_ERROR << 16;
1321                 } else if (pkt->entry_status & RF_BUSY) {
1322                         sp->cmd->result = DID_BUS_BUSY << 16;
1323                 } else {
1324                         sp->cmd->result = DID_ERROR << 16;
1325                 }
1326                 qla2x00_sp_compl(ha, sp);
1327
1328         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1329             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1330                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1331                     ha->host_no));
1332                 qla_printk(KERN_WARNING, ha,
1333                     "Error entry - invalid handle\n");
1334
1335                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1336                 qla2xxx_wake_dpc(ha);
1337         }
1338 }
1339
1340 /**
1341  * qla2x00_ms_entry() - Process a Management Server entry.
1342  * @ha: SCSI driver HA context
1343  * @index: Response queue out pointer
1344  */
1345 static void
1346 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1347 {
1348         srb_t          *sp;
1349
1350         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1351             __func__, ha->host_no, pkt, pkt->handle1));
1352
1353         /* Validate handle. */
1354         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1355                 sp = ha->outstanding_cmds[pkt->handle1];
1356         else
1357                 sp = NULL;
1358
1359         if (sp == NULL) {
1360                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1361                     ha->host_no));
1362                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1363
1364                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1365                 return;
1366         }
1367
1368         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1369         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1370
1371         /* Free outstanding command slot. */
1372         ha->outstanding_cmds[pkt->handle1] = NULL;
1373
1374         qla2x00_sp_compl(ha, sp);
1375 }
1376
1377
1378 /**
1379  * qla24xx_mbx_completion() - Process mailbox command completions.
1380  * @ha: SCSI driver HA context
1381  * @mb0: Mailbox0 register
1382  */
1383 static void
1384 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1385 {
1386         uint16_t        cnt;
1387         uint16_t __iomem *wptr;
1388         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1389
1390         /* Load return mailbox registers. */
1391         ha->flags.mbox_int = 1;
1392         ha->mailbox_out[0] = mb0;
1393         wptr = (uint16_t __iomem *)&reg->mailbox1;
1394
1395         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1396                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1397                 wptr++;
1398         }
1399
1400         if (ha->mcp) {
1401                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1402                     __func__, ha->host_no, ha->mcp->mb[0]));
1403         } else {
1404                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1405                     __func__, ha->host_no));
1406         }
1407 }
1408
1409 /**
1410  * qla24xx_process_response_queue() - Process response queue entries.
1411  * @ha: SCSI driver HA context
1412  */
1413 void
1414 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1415 {
1416         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1417         struct sts_entry_24xx *pkt;
1418
1419         if (!ha->flags.online)
1420                 return;
1421
1422         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1423                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1424
1425                 ha->rsp_ring_index++;
1426                 if (ha->rsp_ring_index == ha->response_q_length) {
1427                         ha->rsp_ring_index = 0;
1428                         ha->response_ring_ptr = ha->response_ring;
1429                 } else {
1430                         ha->response_ring_ptr++;
1431                 }
1432
1433                 if (pkt->entry_status != 0) {
1434                         DEBUG3(printk(KERN_INFO
1435                             "scsi(%ld): Process error entry.\n", ha->host_no));
1436
1437                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1438                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1439                         wmb();
1440                         continue;
1441                 }
1442
1443                 switch (pkt->entry_type) {
1444                 case STATUS_TYPE:
1445                         qla2x00_status_entry(ha, pkt);
1446                         break;
1447                 case STATUS_CONT_TYPE:
1448                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1449                         break;
1450                 case MS_IOCB_TYPE:
1451                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1452                         break;
1453                 case VP_RPT_ID_IOCB_TYPE:
1454                         qla24xx_report_id_acquisition(ha,
1455                             (struct vp_rpt_id_entry_24xx *)pkt);
1456                         break;
1457                 default:
1458                         /* Type Not Supported. */
1459                         DEBUG4(printk(KERN_WARNING
1460                             "scsi(%ld): Received unknown response pkt type %x "
1461                             "entry status=%x.\n",
1462                             ha->host_no, pkt->entry_type, pkt->entry_status));
1463                         break;
1464                 }
1465                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1466                 wmb();
1467         }
1468
1469         /* Adjust ring index */
1470         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1471 }
1472
1473 static void
1474 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1475 {
1476         int rval;
1477         uint32_t cnt;
1478         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1479
1480         if (!IS_QLA25XX(ha))
1481                 return;
1482
1483         rval = QLA_SUCCESS;
1484         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1485         RD_REG_DWORD(&reg->iobase_addr);
1486         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1487         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1488             rval == QLA_SUCCESS; cnt--) {
1489                 if (cnt) {
1490                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1491                         udelay(10);
1492                 } else
1493                         rval = QLA_FUNCTION_TIMEOUT;
1494         }
1495         if (rval == QLA_SUCCESS)
1496                 goto next_test;
1497
1498         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1499         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1500             rval == QLA_SUCCESS; cnt--) {
1501                 if (cnt) {
1502                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1503                         udelay(10);
1504                 } else
1505                         rval = QLA_FUNCTION_TIMEOUT;
1506         }
1507         if (rval != QLA_SUCCESS)
1508                 goto done;
1509
1510 next_test:
1511         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1512                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1513
1514 done:
1515         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1516         RD_REG_DWORD(&reg->iobase_window);
1517 }
1518
1519 /**
1520  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1521  * @irq:
1522  * @dev_id: SCSI driver HA context
1523  *
1524  * Called by system whenever the host adapter generates an interrupt.
1525  *
1526  * Returns handled flag.
1527  */
1528 irqreturn_t
1529 qla24xx_intr_handler(int irq, void *dev_id)
1530 {
1531         scsi_qla_host_t *ha;
1532         struct device_reg_24xx __iomem *reg;
1533         int             status;
1534         unsigned long   iter;
1535         uint32_t        stat;
1536         uint32_t        hccr;
1537         uint16_t        mb[4];
1538
1539         ha = (scsi_qla_host_t *) dev_id;
1540         if (!ha) {
1541                 printk(KERN_INFO
1542                     "%s(): NULL host pointer\n", __func__);
1543                 return IRQ_NONE;
1544         }
1545
1546         reg = &ha->iobase->isp24;
1547         status = 0;
1548
1549         spin_lock(&ha->hardware_lock);
1550         for (iter = 50; iter--; ) {
1551                 stat = RD_REG_DWORD(&reg->host_status);
1552                 if (stat & HSRX_RISC_PAUSED) {
1553                         if (pci_channel_offline(ha->pdev))
1554                                 break;
1555
1556                         hccr = RD_REG_DWORD(&reg->hccr);
1557
1558                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1559                             "Dumping firmware!\n", hccr);
1560
1561                         qla2xxx_check_risc_status(ha);
1562
1563                         ha->isp_ops->fw_dump(ha, 1);
1564                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1565                         break;
1566                 } else if ((stat & HSRX_RISC_INT) == 0)
1567                         break;
1568
1569                 switch (stat & 0xff) {
1570                 case 0x1:
1571                 case 0x2:
1572                 case 0x10:
1573                 case 0x11:
1574                         qla24xx_mbx_completion(ha, MSW(stat));
1575                         status |= MBX_INTERRUPT;
1576
1577                         break;
1578                 case 0x12:
1579                         mb[0] = MSW(stat);
1580                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1581                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1582                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1583                         qla2x00_async_event(ha, mb);
1584                         break;
1585                 case 0x13:
1586                         qla24xx_process_response_queue(ha);
1587                         break;
1588                 default:
1589                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1590                             "(%d).\n",
1591                             ha->host_no, stat & 0xff));
1592                         break;
1593                 }
1594                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1595                 RD_REG_DWORD_RELAXED(&reg->hccr);
1596         }
1597         spin_unlock(&ha->hardware_lock);
1598
1599         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1600             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1601                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1602                 complete(&ha->mbx_intr_comp);
1603         }
1604
1605         return IRQ_HANDLED;
1606 }
1607
1608 /**
1609  * qla24xx_ms_entry() - Process a Management Server entry.
1610  * @ha: SCSI driver HA context
1611  * @index: Response queue out pointer
1612  */
1613 static void
1614 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1615 {
1616         srb_t          *sp;
1617
1618         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1619             __func__, ha->host_no, pkt, pkt->handle));
1620
1621         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1622         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1623
1624         /* Validate handle. */
1625         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1626                 sp = ha->outstanding_cmds[pkt->handle];
1627         else
1628                 sp = NULL;
1629
1630         if (sp == NULL) {
1631                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1632                     ha->host_no));
1633                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1634                     ha->host_no));
1635                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1636                     pkt->handle);
1637
1638                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1639                 return;
1640         }
1641
1642         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1643         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1644
1645         /* Free outstanding command slot. */
1646         ha->outstanding_cmds[pkt->handle] = NULL;
1647
1648         qla2x00_sp_compl(ha, sp);
1649 }
1650
1651 static irqreturn_t
1652 qla24xx_msix_rsp_q(int irq, void *dev_id)
1653 {
1654         scsi_qla_host_t *ha;
1655         struct device_reg_24xx __iomem *reg;
1656
1657         ha = dev_id;
1658         reg = &ha->iobase->isp24;
1659
1660         spin_lock(&ha->hardware_lock);
1661
1662         qla24xx_process_response_queue(ha);
1663         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1664
1665         spin_unlock(&ha->hardware_lock);
1666
1667         return IRQ_HANDLED;
1668 }
1669
1670 static irqreturn_t
1671 qla24xx_msix_default(int irq, void *dev_id)
1672 {
1673         scsi_qla_host_t *ha;
1674         struct device_reg_24xx __iomem *reg;
1675         int             status;
1676         uint32_t        stat;
1677         uint32_t        hccr;
1678         uint16_t        mb[4];
1679
1680         ha = dev_id;
1681         reg = &ha->iobase->isp24;
1682         status = 0;
1683
1684         spin_lock(&ha->hardware_lock);
1685         do {
1686                 stat = RD_REG_DWORD(&reg->host_status);
1687                 if (stat & HSRX_RISC_PAUSED) {
1688                         if (pci_channel_offline(ha->pdev))
1689                                 break;
1690
1691                         hccr = RD_REG_DWORD(&reg->hccr);
1692
1693                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1694                             "Dumping firmware!\n", hccr);
1695
1696                         qla2xxx_check_risc_status(ha);
1697
1698                         ha->isp_ops->fw_dump(ha, 1);
1699                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1700                         break;
1701                 } else if ((stat & HSRX_RISC_INT) == 0)
1702                         break;
1703
1704                 switch (stat & 0xff) {
1705                 case 0x1:
1706                 case 0x2:
1707                 case 0x10:
1708                 case 0x11:
1709                         qla24xx_mbx_completion(ha, MSW(stat));
1710                         status |= MBX_INTERRUPT;
1711
1712                         break;
1713                 case 0x12:
1714                         mb[0] = MSW(stat);
1715                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1716                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1717                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1718                         qla2x00_async_event(ha, mb);
1719                         break;
1720                 case 0x13:
1721                         qla24xx_process_response_queue(ha);
1722                         break;
1723                 default:
1724                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1725                             "(%d).\n",
1726                             ha->host_no, stat & 0xff));
1727                         break;
1728                 }
1729                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1730         } while (0);
1731         spin_unlock(&ha->hardware_lock);
1732
1733         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1734             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1735                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1736                 complete(&ha->mbx_intr_comp);
1737         }
1738
1739         return IRQ_HANDLED;
1740 }
1741
1742 /* Interrupt handling helpers. */
1743
1744 struct qla_init_msix_entry {
1745         uint16_t entry;
1746         uint16_t index;
1747         const char *name;
1748         irq_handler_t handler;
1749 };
1750
1751 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1752         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1753                 "qla2xxx (default)", qla24xx_msix_default },
1754
1755         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1756                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1757 };
1758
1759 static void
1760 qla24xx_disable_msix(scsi_qla_host_t *ha)
1761 {
1762         int i;
1763         struct qla_msix_entry *qentry;
1764
1765         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1766                 qentry = &ha->msix_entries[imsix_entries[i].index];
1767                 if (qentry->have_irq)
1768                         free_irq(qentry->msix_vector, ha);
1769         }
1770         pci_disable_msix(ha->pdev);
1771 }
1772
1773 static int
1774 qla24xx_enable_msix(scsi_qla_host_t *ha)
1775 {
1776         int i, ret;
1777         struct msix_entry entries[QLA_MSIX_ENTRIES];
1778         struct qla_msix_entry *qentry;
1779
1780         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1781                 entries[i].entry = imsix_entries[i].entry;
1782
1783         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1784         if (ret) {
1785                 qla_printk(KERN_WARNING, ha,
1786                     "MSI-X: Failed to enable support -- %d/%d\n",
1787                     QLA_MSIX_ENTRIES, ret);
1788                 goto msix_out;
1789         }
1790         ha->flags.msix_enabled = 1;
1791
1792         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1793                 qentry = &ha->msix_entries[imsix_entries[i].index];
1794                 qentry->msix_vector = entries[i].vector;
1795                 qentry->msix_entry = entries[i].entry;
1796                 qentry->have_irq = 0;
1797                 ret = request_irq(qentry->msix_vector,
1798                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1799                 if (ret) {
1800                         qla_printk(KERN_WARNING, ha,
1801                             "MSI-X: Unable to register handler -- %x/%d.\n",
1802                             imsix_entries[i].index, ret);
1803                         qla24xx_disable_msix(ha);
1804                         goto msix_out;
1805                 }
1806                 qentry->have_irq = 1;
1807         }
1808
1809 msix_out:
1810         return ret;
1811 }
1812
1813 int
1814 qla2x00_request_irqs(scsi_qla_host_t *ha)
1815 {
1816         int ret;
1817         device_reg_t __iomem *reg = ha->iobase;
1818
1819         /* If possible, enable MSI-X. */
1820         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1821                 goto skip_msix;
1822
1823         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1824             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1825                 DEBUG2(qla_printk(KERN_WARNING, ha,
1826                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1827                     ha->chip_revision, ha->fw_attributes));
1828
1829                 goto skip_msix;
1830         }
1831
1832         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1833             (ha->pdev->subsystem_device == 0x7040 ||
1834                 ha->pdev->subsystem_device == 0x7041 ||
1835                 ha->pdev->subsystem_device == 0x1705)) {
1836                 DEBUG2(qla_printk(KERN_WARNING, ha,
1837                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1838                     ha->pdev->subsystem_vendor,
1839                     ha->pdev->subsystem_device));
1840
1841                 goto skip_msi;
1842         }
1843
1844         ret = qla24xx_enable_msix(ha);
1845         if (!ret) {
1846                 DEBUG2(qla_printk(KERN_INFO, ha,
1847                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1848                     ha->fw_attributes));
1849                 goto clear_risc_ints;
1850         }
1851         qla_printk(KERN_WARNING, ha,
1852             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1853 skip_msix:
1854
1855         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1856                 goto skip_msi;
1857
1858         ret = pci_enable_msi(ha->pdev);
1859         if (!ret) {
1860                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1861                 ha->flags.msi_enabled = 1;
1862         }
1863 skip_msi:
1864
1865         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1866             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1867         if (ret) {
1868                 qla_printk(KERN_WARNING, ha,
1869                     "Failed to reserve interrupt %d already in use.\n",
1870                     ha->pdev->irq);
1871                 goto fail;
1872         }
1873         ha->flags.inta_enabled = 1;
1874         ha->host->irq = ha->pdev->irq;
1875 clear_risc_ints:
1876
1877         ha->isp_ops->disable_intrs(ha);
1878         spin_lock_irq(&ha->hardware_lock);
1879         if (IS_FWI2_CAPABLE(ha)) {
1880                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1881                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1882         } else {
1883                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1884                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1885                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1886         }
1887         spin_unlock_irq(&ha->hardware_lock);
1888         ha->isp_ops->enable_intrs(ha);
1889
1890 fail:
1891         return ret;
1892 }
1893
1894 void
1895 qla2x00_free_irqs(scsi_qla_host_t *ha)
1896 {
1897
1898         if (ha->flags.msix_enabled)
1899                 qla24xx_disable_msix(ha);
1900         else if (ha->flags.inta_enabled) {
1901                 free_irq(ha->host->irq, ha);
1902                 pci_disable_msi(ha->pdev);
1903         }
1904 }