git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 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
  18 /**
  19  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  20  * @irq:
  21  * @dev_id: SCSI driver HA context
  22  *
  23  * Called by system whenever the host adapter generates an interrupt.
  24  *
  25  * Returns handled flag.
  26  */
  27 irqreturn_t
  28 qla2100_intr_handler(int irq, void *dev_id)
  29 {
  30         scsi_qla_host_t *ha;
  31         struct device_reg_2xxx __iomem *reg;
  32         int             status;
  33         unsigned long   iter;
  34         uint16_t        hccr;
  35         uint16_t        mb[4];
  36
  37         ha = (scsi_qla_host_t *) dev_id;
  38         if (!ha) {
  39                 printk(KERN_INFO
  40                     "%s(): NULL host pointer\n", __func__);
  41                 return (IRQ_NONE);
  42         }
  43
  44         reg = &ha->iobase->isp;
  45         status = 0;
  46
  47         spin_lock(&ha->hardware_lock);
  48         for (iter = 50; iter--; ) {
  49                 hccr = RD_REG_WORD(&reg->hccr);
  50                 if (hccr & HCCR_RISC_PAUSE) {
  51                         if (pci_channel_offline(ha->pdev))
  52                                 break;
  53
  54                         /*
  55                          * Issue a "HARD" reset in order for the RISC interrupt
  56                          * bit to be cleared.  Schedule a big hammmer to get
  57                          * out of the RISC PAUSED state.
  58                          */
  59                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  60                         RD_REG_WORD(&reg->hccr);
  61
  62                         ha->isp_ops->fw_dump(ha, 1);
  63                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  64                         break;
  65                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  66                         break;
  67
  68                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  69                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  70                         RD_REG_WORD(&reg->hccr);
  71
  72                         /* Get mailbox data. */
  73                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  74                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  75                                 qla2x00_mbx_completion(ha, mb[0]);
  76                                 status |= MBX_INTERRUPT;
  77                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  78                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  79                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  80                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  81                                 qla2x00_async_event(ha, mb);
  82                         } else {
  83                                 /*EMPTY*/
  84                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  85                                     "interrupt type (%d).\n",
  86                                     ha->host_no, mb[0]));
  87                         }
  88                         /* Release mailbox registers. */
  89                         WRT_REG_WORD(&reg->semaphore, 0);
  90                         RD_REG_WORD(&reg->semaphore);
  91                 } else {
  92                         qla2x00_process_response_queue(ha);
  93
  94                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  95                         RD_REG_WORD(&reg->hccr);
  96                 }
  97         }
  98         spin_unlock(&ha->hardware_lock);
  99
 100         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 101             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 102                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 103                 complete(&ha->mbx_intr_comp);
 104         }
 105
 106         return (IRQ_HANDLED);
 107 }
 108
 109 /**
 110  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 111  * @irq:
 112  * @dev_id: SCSI driver HA context
 113  *
 114  * Called by system whenever the host adapter generates an interrupt.
 115  *
 116  * Returns handled flag.
 117  */
 118 irqreturn_t
 119 qla2300_intr_handler(int irq, void *dev_id)
 120 {
 121         scsi_qla_host_t *ha;
 122         struct device_reg_2xxx __iomem *reg;
 123         int             status;
 124         unsigned long   iter;
 125         uint32_t        stat;
 126         uint16_t        hccr;
 127         uint16_t        mb[4];
 128
 129         ha = (scsi_qla_host_t *) dev_id;
 130         if (!ha) {
 131                 printk(KERN_INFO
 132                     "%s(): NULL host pointer\n", __func__);
 133                 return (IRQ_NONE);
 134         }
 135
 136         reg = &ha->iobase->isp;
 137         status = 0;
 138
 139         spin_lock(&ha->hardware_lock);
 140         for (iter = 50; iter--; ) {
 141                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 142                 if (stat & HSR_RISC_PAUSED) {
 143                         if (pci_channel_offline(ha->pdev))
 144                                 break;
 145
 146                         hccr = RD_REG_WORD(&reg->hccr);
 147                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 148                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 149                                     "HCCR=%x, Dumping firmware!\n", hccr);
 150                         else
 151                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 152                                     "HCCR=%x, Dumping firmware!\n", hccr);
 153
 154                         /*
 155                          * Issue a "HARD" reset in order for the RISC
 156                          * interrupt bit to be cleared.  Schedule a big
 157                          * hammmer to get out of the RISC PAUSED state.
 158                          */
 159                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 160                         RD_REG_WORD(&reg->hccr);
 161
 162                         ha->isp_ops->fw_dump(ha, 1);
 163                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 164                         break;
 165                 } else if ((stat & HSR_RISC_INT) == 0)
 166                         break;
 167
 168                 switch (stat & 0xff) {
 169                 case 0x1:
 170                 case 0x2:
 171                 case 0x10:
 172                 case 0x11:
 173                         qla2x00_mbx_completion(ha, MSW(stat));
 174                         status |= MBX_INTERRUPT;
 175
 176                         /* Release mailbox registers. */
 177                         WRT_REG_WORD(&reg->semaphore, 0);
 178                         break;
 179                 case 0x12:
 180                         mb[0] = MSW(stat);
 181                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 182                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 183                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 184                         qla2x00_async_event(ha, mb);
 185                         break;
 186                 case 0x13:
 187                         qla2x00_process_response_queue(ha);
 188                         break;
 189                 case 0x15:
 190                         mb[0] = MBA_CMPLT_1_16BIT;
 191                         mb[1] = MSW(stat);
 192                         qla2x00_async_event(ha, mb);
 193                         break;
 194                 case 0x16:
 195                         mb[0] = MBA_SCSI_COMPLETION;
 196                         mb[1] = MSW(stat);
 197                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 198                         qla2x00_async_event(ha, mb);
 199                         break;
 200                 default:
 201                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 202                             "(%d).\n",
 203                             ha->host_no, stat & 0xff));
 204                         break;
 205                 }
 206                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 207                 RD_REG_WORD_RELAXED(&reg->hccr);
 208         }
 209         spin_unlock(&ha->hardware_lock);
 210
 211         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 212             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 213                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 214                 complete(&ha->mbx_intr_comp);
 215         }
 216
 217         return (IRQ_HANDLED);
 218 }
 219
 220 /**
 221  * qla2x00_mbx_completion() - Process mailbox command completions.
 222  * @ha: SCSI driver HA context
 223  * @mb0: Mailbox0 register
 224  */
 225 static void
 226 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 227 {
 228         uint16_t        cnt;
 229         uint16_t __iomem *wptr;
 230         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 231
 232         /* Load return mailbox registers. */
 233         ha->flags.mbox_int = 1;
 234         ha->mailbox_out[0] = mb0;
 235         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 236
 237         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 238                 if (IS_QLA2200(ha) && cnt == 8)
 239                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 240                 if (cnt == 4 || cnt == 5)
 241                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 242                 else
 243                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 244
 245                 wptr++;
 246         }
 247
 248         if (ha->mcp) {
 249                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 250                     __func__, ha->host_no, ha->mcp->mb[0]));
 251         } else {
 252                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 253                     __func__, ha->host_no));
 254         }
 255 }
 256
 257 /**
 258  * qla2x00_async_event() - Process aynchronous events.
 259  * @ha: SCSI driver HA context
 260  * @mb: Mailbox registers (0 - 3)
 261  */
 262 void
 263 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 264 {
 265 #define LS_UNKNOWN      2
 266         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 267         char            *link_speed;
 268         uint16_t        handle_cnt;
 269         uint16_t        cnt;
 270         uint32_t        handles[5];
 271         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 272         uint32_t        rscn_entry, host_pid;
 273         uint8_t         rscn_queue_index;
 274         unsigned long   flags;
 275         scsi_qla_host_t *vha;
 276         int             i;
 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                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 353                 ha->isp_ops->fw_dump(ha, 1);
 354
 355                 if (IS_FWI2_CAPABLE(ha)) {
 356                         if (mb[1] == 0 && mb[2] == 0) {
 357                                 qla_printk(KERN_ERR, ha,
 358                                     "Unrecoverable Hardware Error: adapter "
 359                                     "marked OFFLINE!\n");
 360                                 ha->flags.online = 0;
 361                         } else
 362                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 363                 } else if (mb[1] == 0) {
 364                         qla_printk(KERN_INFO, ha,
 365                             "Unrecoverable Hardware Error: adapter marked "
 366                             "OFFLINE!\n");
 367                         ha->flags.online = 0;
 368                 } else
 369                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 370                 break;
 371
 372         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 373                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 374                     ha->host_no));
 375                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 376
 377                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 378                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 379                 break;
 380
 381         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 382                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 383                     ha->host_no));
 384                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 385
 386                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 387                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 388                 break;
 389
 390         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 391                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 392                     ha->host_no));
 393                 break;
 394
 395         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 396                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 397                     mb[1]));
 398                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 399
 400                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 401                         atomic_set(&ha->loop_state, LOOP_DOWN);
 402                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 403                         qla2x00_mark_all_devices_lost(ha, 1);
 404                 }
 405
 406                 if (ha->parent) {
 407                         atomic_set(&ha->vp_state, VP_FAILED);
 408                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 409                 }
 410
 411                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 412                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 413
 414                 ha->flags.management_server_logged_in = 0;
 415                 qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
 416                 break;
 417
 418         case MBA_LOOP_UP:               /* Loop Up Event */
 419                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 420                         link_speed = link_speeds[0];
 421                         ha->link_data_rate = PORT_SPEED_1GB;
 422                 } else {
 423                         link_speed = link_speeds[LS_UNKNOWN];
 424                         if (mb[1] < 5)
 425                                 link_speed = link_speeds[mb[1]];
 426                         ha->link_data_rate = mb[1];
 427                 }
 428
 429                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 430                     ha->host_no, link_speed));
 431                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 432                     link_speed);
 433
 434                 ha->flags.management_server_logged_in = 0;
 435                 qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
 436                 break;
 437
 438         case MBA_LOOP_DOWN:             /* Loop Down Event */
 439                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
 440                     "(%x %x %x).\n", ha->host_no, mb[1], mb[2], mb[3]));
 441                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
 442                     mb[1], mb[2], mb[3]);
 443
 444                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 445                         atomic_set(&ha->loop_state, LOOP_DOWN);
 446                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 447                         ha->device_flags |= DFLG_NO_CABLE;
 448                         qla2x00_mark_all_devices_lost(ha, 1);
 449                 }
 450
 451                 if (ha->parent) {
 452                         atomic_set(&ha->vp_state, VP_FAILED);
 453                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 454                 }
 455
 456                 ha->flags.management_server_logged_in = 0;
 457                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 458                 qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
 459                 break;
 460
 461         case MBA_LIP_RESET:             /* LIP reset occurred */
 462                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 463                     ha->host_no, mb[1]));
 464                 qla_printk(KERN_INFO, ha,
 465                     "LIP reset occured (%x).\n", mb[1]);
 466
 467                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 468                         atomic_set(&ha->loop_state, LOOP_DOWN);
 469                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 470                         qla2x00_mark_all_devices_lost(ha, 1);
 471                 }
 472
 473                 if (ha->parent) {
 474                         atomic_set(&ha->vp_state, VP_FAILED);
 475                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 476                 }
 477
 478                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 479
 480                 ha->operating_mode = LOOP;
 481                 ha->flags.management_server_logged_in = 0;
 482                 qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
 483                 break;
 484
 485         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 486                 if (IS_QLA2100(ha))
 487                         break;
 488
 489                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 490                     ha->host_no));
 491
 492                 /*
 493                  * Until there's a transition from loop down to loop up, treat
 494                  * this as loop down only.
 495                  */
 496                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 497                         atomic_set(&ha->loop_state, LOOP_DOWN);
 498                         if (!atomic_read(&ha->loop_down_timer))
 499                                 atomic_set(&ha->loop_down_timer,
 500                                     LOOP_DOWN_TIME);
 501                         qla2x00_mark_all_devices_lost(ha, 1);
 502                 }
 503
 504                 if (ha->parent) {
 505                         atomic_set(&ha->vp_state, VP_FAILED);
 506                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 507                 }
 508
 509                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 510                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 511                 }
 512                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 513                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 514
 515                 ha->flags.gpsc_supported = 1;
 516                 ha->flags.management_server_logged_in = 0;
 517                 break;
 518
 519         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 520                 if (IS_QLA2100(ha))
 521                         break;
 522
 523                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 524                     "received.\n",
 525                     ha->host_no));
 526                 qla_printk(KERN_INFO, ha,
 527                     "Configuration change detected: value=%x.\n", mb[1]);
 528
 529                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 530                         atomic_set(&ha->loop_state, LOOP_DOWN);
 531                         if (!atomic_read(&ha->loop_down_timer))
 532                                 atomic_set(&ha->loop_down_timer,
 533                                     LOOP_DOWN_TIME);
 534                         qla2x00_mark_all_devices_lost(ha, 1);
 535                 }
 536
 537                 if (ha->parent) {
 538                         atomic_set(&ha->vp_state, VP_FAILED);
 539                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 540                 }
 541
 542                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 543                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 544                 break;
 545
 546         case MBA_PORT_UPDATE:           /* Port database update */
 547                 if ((ha->flags.npiv_supported) && (ha->num_vhosts)) {
 548                         for_each_mapped_vp_idx(ha, i) {
 549                                 list_for_each_entry(vha, &ha->vp_list,
 550                                     vp_list) {
 551                                         if ((mb[3] & 0xff)
 552                                             == vha->vp_idx) {
 553                                                 ha = vha;
 554                                                 break;
 555                                         }
 556                                 }
 557                         }
 558                 }
 559                 /*
 560                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 561                  * event etc. earlier indicating loop is down) then process
 562                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 563                  */
 564                 atomic_set(&ha->loop_down_timer, 0);
 565                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 566                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 567                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 568                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 569                             mb[2], mb[3]));
 570                         break;
 571                 }
 572
 573                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 574                     ha->host_no));
 575                 DEBUG(printk(KERN_INFO
 576                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 577                     ha->host_no, mb[1], mb[2], mb[3]));
 578
 579                 /*
 580                  * Mark all devices as missing so we will login again.
 581                  */
 582                 atomic_set(&ha->loop_state, LOOP_UP);
 583
 584                 qla2x00_mark_all_devices_lost(ha, 1);
 585
 586                 ha->flags.rscn_queue_overflow = 1;
 587
 588                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 589                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 590                 break;
 591
 592         case MBA_RSCN_UPDATE:           /* State Change Registration */
 593                 if ((ha->flags.npiv_supported) && (ha->num_vhosts)) {
 594                         for_each_mapped_vp_idx(ha, i) {
 595                                 list_for_each_entry(vha, &ha->vp_list,
 596                                     vp_list) {
 597                                         if ((mb[3] & 0xff)
 598                                             == vha->vp_idx) {
 599                                                 ha = vha;
 600                                                 break;
 601                                         }
 602                                 }
 603                         }
 604                 }
 605
 606                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 607                     ha->host_no));
 608                 DEBUG(printk(KERN_INFO
 609                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 610                     ha->host_no, mb[1], mb[2], mb[3]));
 611
 612                 rscn_entry = (mb[1] << 16) | mb[2];
 613                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 614                     ha->d_id.b.al_pa;
 615                 if (rscn_entry == host_pid) {
 616                         DEBUG(printk(KERN_INFO
 617                             "scsi(%ld): Ignoring RSCN update to local host "
 618                             "port ID (%06x)\n",
 619                             ha->host_no, host_pid));
 620                         break;
 621                 }
 622
 623                 rscn_queue_index = ha->rscn_in_ptr + 1;
 624                 if (rscn_queue_index == MAX_RSCN_COUNT)
 625                         rscn_queue_index = 0;
 626                 if (rscn_queue_index != ha->rscn_out_ptr) {
 627                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 628                         ha->rscn_in_ptr = rscn_queue_index;
 629                 } else {
 630                         ha->flags.rscn_queue_overflow = 1;
 631                 }
 632
 633                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 634                 atomic_set(&ha->loop_down_timer, 0);
 635                 ha->flags.management_server_logged_in = 0;
 636
 637                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 638                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 639                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
 640                 break;
 641
 642         /* case MBA_RIO_RESPONSE: */
 643         case MBA_ZIO_RESPONSE:
 644                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 645                     ha->host_no));
 646                 DEBUG(printk(KERN_INFO
 647                     "scsi(%ld): [R|Z]IO update completion.\n",
 648                     ha->host_no));
 649
 650                 if (IS_FWI2_CAPABLE(ha))
 651                         qla24xx_process_response_queue(ha);
 652                 else
 653                         qla2x00_process_response_queue(ha);
 654                 break;
 655
 656         case MBA_DISCARD_RND_FRAME:
 657                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 658                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 659                 break;
 660
 661         case MBA_TRACE_NOTIFICATION:
 662                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 663                 ha->host_no, mb[1], mb[2]));
 664                 break;
 665
 666         case MBA_ISP84XX_ALERT:
 667                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
 668                     "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));
 669
 670                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
 671                 switch (mb[1]) {
 672                 case A84_PANIC_RECOVERY:
 673                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
 674                             "%04x %04x\n", mb[2], mb[3]);
 675                         break;
 676                 case A84_OP_LOGIN_COMPLETE:
 677                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
 678                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 679                             "firmware version %x\n", ha->cs84xx->op_fw_version));
 680                         break;
 681                 case A84_DIAG_LOGIN_COMPLETE:
 682                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 683                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 684                             "diagnostic firmware version %x\n",
 685                             ha->cs84xx->diag_fw_version));
 686                         break;
 687                 case A84_GOLD_LOGIN_COMPLETE:
 688                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 689                         ha->cs84xx->fw_update = 1;
 690                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
 691                             "firmware version %x\n",
 692                             ha->cs84xx->gold_fw_version));
 693                         break;
 694                 default:
 695                         qla_printk(KERN_ERR, ha,
 696                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
 697                             mb[1], mb[2], mb[3]);
 698                 }
 699                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
 700                 break;
 701         }
 702
 703         if (!ha->parent && ha->num_vhosts)
 704                 qla2x00_alert_all_vps(ha, mb);
 705 }
 706
 707 static void
 708 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 709 {
 710         fc_port_t *fcport = data;
 711
 712         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 713                 return;
 714
 715         if (sdev->ordered_tags)
 716                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 717                     sdev->queue_depth + 1);
 718         else
 719                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 720                     sdev->queue_depth + 1);
 721
 722         fcport->last_ramp_up = jiffies;
 723
 724         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 725             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 726             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 727             sdev->queue_depth));
 728 }
 729
 730 static void
 731 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 732 {
 733         fc_port_t *fcport = data;
 734
 735         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 736                 return;
 737
 738         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 739             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 740             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 741             sdev->queue_depth));
 742 }
 743
 744 static inline void
 745 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 746 {
 747         fc_port_t *fcport;
 748         struct scsi_device *sdev;
 749
 750         sdev = sp->cmd->device;
 751         if (sdev->queue_depth >= ha->max_q_depth)
 752                 return;
 753
 754         fcport = sp->fcport;
 755         if (time_before(jiffies,
 756             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 757                 return;
 758         if (time_before(jiffies,
 759             fcport->last_queue_full + ql2xqfullrampup * HZ))
 760                 return;
 761
 762         starget_for_each_device(sdev->sdev_target, fcport,
 763             qla2x00_adjust_sdev_qdepth_up);
 764 }
 765
 766 /**
 767  * qla2x00_process_completed_request() - Process a Fast Post response.
 768  * @ha: SCSI driver HA context
 769  * @index: SRB index
 770  */
 771 static void
 772 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 773 {
 774         srb_t *sp;
 775
 776         /* Validate handle. */
 777         if (index >= MAX_OUTSTANDING_COMMANDS) {
 778                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 779                     ha->host_no, index));
 780                 qla_printk(KERN_WARNING, ha,
 781                     "Invalid SCSI completion handle %d.\n", index);
 782
 783                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 784                 return;
 785         }
 786
 787         sp = ha->outstanding_cmds[index];
 788         if (sp) {
 789                 /* Free outstanding command slot. */
 790                 ha->outstanding_cmds[index] = NULL;
 791
 792                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 793                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 794
 795                 /* Save ISP completion status */
 796                 sp->cmd->result = DID_OK << 16;
 797
 798                 qla2x00_ramp_up_queue_depth(ha, sp);
 799                 qla2x00_sp_compl(ha, sp);
 800         } else {
 801                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 802                     ha->host_no));
 803                 qla_printk(KERN_WARNING, ha,
 804                     "Invalid ISP SCSI completion handle\n");
 805
 806                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 807         }
 808 }
 809
 810 /**
 811  * qla2x00_process_response_queue() - Process response queue entries.
 812  * @ha: SCSI driver HA context
 813  */
 814 void
 815 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 816 {
 817         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 818         sts_entry_t     *pkt;
 819         uint16_t        handle_cnt;
 820         uint16_t        cnt;
 821
 822         if (!ha->flags.online)
 823                 return;
 824
 825         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 826                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 827
 828                 ha->rsp_ring_index++;
 829                 if (ha->rsp_ring_index == ha->response_q_length) {
 830                         ha->rsp_ring_index = 0;
 831                         ha->response_ring_ptr = ha->response_ring;
 832                 } else {
 833                         ha->response_ring_ptr++;
 834                 }
 835
 836                 if (pkt->entry_status != 0) {
 837                         DEBUG3(printk(KERN_INFO
 838                             "scsi(%ld): Process error entry.\n", ha->host_no));
 839
 840                         qla2x00_error_entry(ha, pkt);
 841                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 842                         wmb();
 843                         continue;
 844                 }
 845
 846                 switch (pkt->entry_type) {
 847                 case STATUS_TYPE:
 848                         qla2x00_status_entry(ha, pkt);
 849                         break;
 850                 case STATUS_TYPE_21:
 851                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 852                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 853                                 qla2x00_process_completed_request(ha,
 854                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 855                         }
 856                         break;
 857                 case STATUS_TYPE_22:
 858                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 859                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 860                                 qla2x00_process_completed_request(ha,
 861                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 862                         }
 863                         break;
 864                 case STATUS_CONT_TYPE:
 865                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 866                         break;
 867                 default:
 868                         /* Type Not Supported. */
 869                         DEBUG4(printk(KERN_WARNING
 870                             "scsi(%ld): Received unknown response pkt type %x "
 871                             "entry status=%x.\n",
 872                             ha->host_no, pkt->entry_type, pkt->entry_status));
 873                         break;
 874                 }
 875                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 876                 wmb();
 877         }
 878
 879         /* Adjust ring index */
 880         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 881 }
 882
 883 static inline void
 884 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 885 {
 886         struct scsi_cmnd *cp = sp->cmd;
 887
 888         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 889                 sense_len = SCSI_SENSE_BUFFERSIZE;
 890
 891         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 892         sp->request_sense_length = sense_len;
 893         sp->request_sense_ptr = cp->sense_buffer;
 894         if (sp->request_sense_length > 32)
 895                 sense_len = 32;
 896
 897         memcpy(cp->sense_buffer, sense_data, sense_len);
 898
 899         sp->request_sense_ptr += sense_len;
 900         sp->request_sense_length -= sense_len;
 901         if (sp->request_sense_length != 0)
 902                 sp->ha->status_srb = sp;
 903
 904         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 905             "cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
 906             cp->device->id, cp->device->lun, cp, cp->serial_number));
 907         if (sense_len)
 908                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 909                     CMD_ACTUAL_SNSLEN(cp)));
 910 }
 911
 912 /**
 913  * qla2x00_status_entry() - Process a Status IOCB entry.
 914  * @ha: SCSI driver HA context
 915  * @pkt: Entry pointer
 916  */
 917 static void
 918 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 919 {
 920         srb_t           *sp;
 921         fc_port_t       *fcport;
 922         struct scsi_cmnd *cp;
 923         sts_entry_t *sts;
 924         struct sts_entry_24xx *sts24;
 925         uint16_t        comp_status;
 926         uint16_t        scsi_status;
 927         uint8_t         lscsi_status;
 928         int32_t         resid;
 929         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 930         uint8_t         *rsp_info, *sense_data;
 931
 932         sts = (sts_entry_t *) pkt;
 933         sts24 = (struct sts_entry_24xx *) pkt;
 934         if (IS_FWI2_CAPABLE(ha)) {
 935                 comp_status = le16_to_cpu(sts24->comp_status);
 936                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 937         } else {
 938                 comp_status = le16_to_cpu(sts->comp_status);
 939                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 940         }
 941
 942         /* Fast path completion. */
 943         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 944                 qla2x00_process_completed_request(ha, sts->handle);
 945
 946                 return;
 947         }
 948
 949         /* Validate handle. */
 950         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 951                 sp = ha->outstanding_cmds[sts->handle];
 952                 ha->outstanding_cmds[sts->handle] = NULL;
 953         } else
 954                 sp = NULL;
 955
 956         if (sp == NULL) {
 957                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 958                     ha->host_no));
 959                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 960
 961                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 962                 qla2xxx_wake_dpc(ha);
 963                 return;
 964         }
 965         cp = sp->cmd;
 966         if (cp == NULL) {
 967                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 968                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 969                 qla_printk(KERN_WARNING, ha,
 970                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 971
 972                 return;
 973         }
 974
 975         lscsi_status = scsi_status & STATUS_MASK;
 976         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 977         CMD_COMPL_STATUS(cp) = comp_status;
 978         CMD_SCSI_STATUS(cp) = scsi_status;
 979
 980         fcport = sp->fcport;
 981
 982         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 983         if (IS_FWI2_CAPABLE(ha)) {
 984                 sense_len = le32_to_cpu(sts24->sense_len);
 985                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 986                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 987                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 988                 rsp_info = sts24->data;
 989                 sense_data = sts24->data;
 990                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 991         } else {
 992                 sense_len = le16_to_cpu(sts->req_sense_length);
 993                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 994                 resid_len = le32_to_cpu(sts->residual_length);
 995                 rsp_info = sts->rsp_info;
 996                 sense_data = sts->req_sense_data;
 997         }
 998
 999         /* Check for any FCP transport errors. */
1000         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
1001                 /* Sense data lies beyond any FCP RESPONSE data. */
1002                 if (IS_FWI2_CAPABLE(ha))
1003                         sense_data += rsp_info_len;
1004                 if (rsp_info_len > 3 && rsp_info[3]) {
1005                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
1006                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
1007                             "retrying command\n", ha->host_no,
1008                             cp->device->channel, cp->device->id,
1009                             cp->device->lun, rsp_info_len, rsp_info[0],
1010                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
1011                             rsp_info[5], rsp_info[6], rsp_info[7]));
1012
1013                         cp->result = DID_BUS_BUSY << 16;
1014                         qla2x00_sp_compl(ha, sp);
1015                         return;
1016                 }
1017         }
1018
1019         /* Check for overrun. */
1020         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1021             scsi_status & SS_RESIDUAL_OVER)
1022                 comp_status = CS_DATA_OVERRUN;
1023
1024         /*
1025          * Based on Host and scsi status generate status code for Linux
1026          */
1027         switch (comp_status) {
1028         case CS_COMPLETE:
1029         case CS_QUEUE_FULL:
1030                 if (scsi_status == 0) {
1031                         cp->result = DID_OK << 16;
1032                         break;
1033                 }
1034                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1035                         resid = resid_len;
1036                         scsi_set_resid(cp, resid);
1037                         CMD_RESID_LEN(cp) = resid;
1038
1039                         if (!lscsi_status &&
1040                             ((unsigned)(scsi_bufflen(cp) - resid) <
1041                              cp->underflow)) {
1042                                 qla_printk(KERN_INFO, ha,
1043                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1044                                            "detected (%x of %x bytes)...returning "
1045                                            "error status.\n", ha->host_no,
1046                                            cp->device->channel, cp->device->id,
1047                                            cp->device->lun, resid,
1048                                            scsi_bufflen(cp));
1049
1050                                 cp->result = DID_ERROR << 16;
1051                                 break;
1052                         }
1053                 }
1054                 cp->result = DID_OK << 16 | lscsi_status;
1055
1056                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1057                         DEBUG2(printk(KERN_INFO
1058                             "scsi(%ld): QUEUE FULL status detected "
1059                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1060                             scsi_status));
1061
1062                         /* Adjust queue depth for all luns on the port. */
1063                         fcport->last_queue_full = jiffies;
1064                         starget_for_each_device(cp->device->sdev_target,
1065                             fcport, qla2x00_adjust_sdev_qdepth_down);
1066                         break;
1067                 }
1068                 if (lscsi_status != SS_CHECK_CONDITION)
1069                         break;
1070
1071                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1072                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1073                         break;
1074
1075                 qla2x00_handle_sense(sp, sense_data, sense_len);
1076                 break;
1077
1078         case CS_DATA_UNDERRUN:
1079                 resid = resid_len;
1080                 /* Use F/W calculated residual length. */
1081                 if (IS_FWI2_CAPABLE(ha)) {
1082                         if (scsi_status & SS_RESIDUAL_UNDER &&
1083                             resid != fw_resid_len) {
1084                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1085                                 lscsi_status = 0;
1086                         }
1087                         resid = fw_resid_len;
1088                 }
1089
1090                 if (scsi_status & SS_RESIDUAL_UNDER) {
1091                         scsi_set_resid(cp, resid);
1092                         CMD_RESID_LEN(cp) = resid;
1093                 } else {
1094                         DEBUG2(printk(KERN_INFO
1095                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1096                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1097                             "os_underflow=0x%x\n", ha->host_no,
1098                             cp->device->id, cp->device->lun, comp_status,
1099                             scsi_status, resid_len, resid, cp->cmnd[0],
1100                             cp->underflow));
1101
1102                 }
1103
1104                 /*
1105                  * Check to see if SCSI Status is non zero. If so report SCSI
1106                  * Status.
1107                  */
1108                 if (lscsi_status != 0) {
1109                         cp->result = DID_OK << 16 | lscsi_status;
1110
1111                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1112                                 DEBUG2(printk(KERN_INFO
1113                                     "scsi(%ld): QUEUE FULL status detected "
1114                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1115                                     scsi_status));
1116
1117                                 /*
1118                                  * Adjust queue depth for all luns on the
1119                                  * port.
1120                                  */
1121                                 fcport->last_queue_full = jiffies;
1122                                 starget_for_each_device(
1123                                     cp->device->sdev_target, fcport,
1124                                     qla2x00_adjust_sdev_qdepth_down);
1125                                 break;
1126                         }
1127                         if (lscsi_status != SS_CHECK_CONDITION)
1128                                 break;
1129
1130                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1131                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1132                                 break;
1133
1134                         qla2x00_handle_sense(sp, sense_data, sense_len);
1135
1136                         /*
1137                          * In case of a Underrun condition, set both the lscsi
1138                          * status and the completion status to appropriate
1139                          * values.
1140                          */
1141                         if (resid &&
1142                             ((unsigned)(scsi_bufflen(cp) - resid) <
1143                              cp->underflow)) {
1144                                 DEBUG2(qla_printk(KERN_INFO, ha,
1145                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1146                                     "detected (%x of %x bytes)...returning "
1147                                     "error status.\n", ha->host_no,
1148                                     cp->device->channel, cp->device->id,
1149                                     cp->device->lun, resid,
1150                                     scsi_bufflen(cp)));
1151
1152                                 cp->result = DID_ERROR << 16 | lscsi_status;
1153                         }
1154                 } else {
1155                         /*
1156                          * If RISC reports underrun and target does not report
1157                          * it then we must have a lost frame, so tell upper
1158                          * layer to retry it by reporting a bus busy.
1159                          */
1160                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1161                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1162                                               "frame(s) detected (%x of %x bytes)..."
1163                                               "retrying command.\n", ha->host_no,
1164                                               cp->device->channel, cp->device->id,
1165                                               cp->device->lun, resid,
1166                                               scsi_bufflen(cp)));
1167
1168                                 cp->result = DID_BUS_BUSY << 16;
1169                                 break;
1170                         }
1171
1172                         /* Handle mid-layer underflow */
1173                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1174                             cp->underflow) {
1175                                 qla_printk(KERN_INFO, ha,
1176                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1177                                            "detected (%x of %x bytes)...returning "
1178                                            "error status.\n", ha->host_no,
1179                                            cp->device->channel, cp->device->id,
1180                                            cp->device->lun, resid,
1181                                            scsi_bufflen(cp));
1182
1183                                 cp->result = DID_ERROR << 16;
1184                                 break;
1185                         }
1186
1187                         /* Everybody online, looking good... */
1188                         cp->result = DID_OK << 16;
1189                 }
1190                 break;
1191
1192         case CS_DATA_OVERRUN:
1193                 DEBUG2(printk(KERN_INFO
1194                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1195                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1196                     scsi_status));
1197                 DEBUG2(printk(KERN_INFO
1198                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1199                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1200                     cp->cmnd[4], cp->cmnd[5]));
1201                 DEBUG2(printk(KERN_INFO
1202                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1203                     "status!\n",
1204                     cp->serial_number, scsi_bufflen(cp), resid_len));
1205
1206                 cp->result = DID_ERROR << 16;
1207                 break;
1208
1209         case CS_PORT_LOGGED_OUT:
1210         case CS_PORT_CONFIG_CHG:
1211         case CS_PORT_BUSY:
1212         case CS_INCOMPLETE:
1213         case CS_PORT_UNAVAILABLE:
1214                 /*
1215                  * If the port is in Target Down state, return all IOs for this
1216                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1217                  * retry_queue.
1218                  */
1219                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1220                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1221                     ha->host_no, cp->device->id, cp->device->lun,
1222                     cp->serial_number, comp_status,
1223                     atomic_read(&fcport->state)));
1224
1225                 cp->result = DID_BUS_BUSY << 16;
1226                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1227                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1228                 }
1229                 break;
1230
1231         case CS_RESET:
1232                 DEBUG2(printk(KERN_INFO
1233                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1234                     ha->host_no, comp_status, scsi_status));
1235
1236                 cp->result = DID_RESET << 16;
1237                 break;
1238
1239         case CS_ABORTED:
1240                 /*
1241                  * hv2.19.12 - DID_ABORT does not retry the request if we
1242                  * aborted this request then abort otherwise it must be a
1243                  * reset.
1244                  */
1245                 DEBUG2(printk(KERN_INFO
1246                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1247                     ha->host_no, comp_status, scsi_status));
1248
1249                 cp->result = DID_RESET << 16;
1250                 break;
1251
1252         case CS_TIMEOUT:
1253                 cp->result = DID_BUS_BUSY << 16;
1254
1255                 if (IS_FWI2_CAPABLE(ha)) {
1256                         DEBUG2(printk(KERN_INFO
1257                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1258                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1259                             cp->device->id, cp->device->lun, comp_status,
1260                             scsi_status));
1261                         break;
1262                 }
1263                 DEBUG2(printk(KERN_INFO
1264                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1265                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1266                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1267                     le16_to_cpu(sts->status_flags)));
1268
1269                 /* Check to see if logout occurred. */
1270                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1271                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1272                 break;
1273
1274         default:
1275                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1276                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1277                 qla_printk(KERN_INFO, ha,
1278                     "Unknown status detected 0x%x-0x%x.\n",
1279                     comp_status, scsi_status);
1280
1281                 cp->result = DID_ERROR << 16;
1282                 break;
1283         }
1284
1285         /* Place command on done queue. */
1286         if (ha->status_srb == NULL)
1287                 qla2x00_sp_compl(ha, sp);
1288 }
1289
1290 /**
1291  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1292  * @ha: SCSI driver HA context
1293  * @pkt: Entry pointer
1294  *
1295  * Extended sense data.
1296  */
1297 static void
1298 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1299 {
1300         uint8_t         sense_sz = 0;
1301         srb_t           *sp = ha->status_srb;
1302         struct scsi_cmnd *cp;
1303
1304         if (sp != NULL && sp->request_sense_length != 0) {
1305                 cp = sp->cmd;
1306                 if (cp == NULL) {
1307                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1308                             "sp=%p.\n", __func__, sp));
1309                         qla_printk(KERN_INFO, ha,
1310                             "cmd is NULL: already returned to OS (sp=%p)\n",
1311                             sp);
1312
1313                         ha->status_srb = NULL;
1314                         return;
1315                 }
1316
1317                 if (sp->request_sense_length > sizeof(pkt->data)) {
1318                         sense_sz = sizeof(pkt->data);
1319                 } else {
1320                         sense_sz = sp->request_sense_length;
1321                 }
1322
1323                 /* Move sense data. */
1324                 if (IS_FWI2_CAPABLE(ha))
1325                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1326                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1327                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1328
1329                 sp->request_sense_ptr += sense_sz;
1330                 sp->request_sense_length -= sense_sz;
1331
1332                 /* Place command on done queue. */
1333                 if (sp->request_sense_length == 0) {
1334                         ha->status_srb = NULL;
1335                         qla2x00_sp_compl(ha, sp);
1336                 }
1337         }
1338 }
1339
1340 /**
1341  * qla2x00_error_entry() - Process an error entry.
1342  * @ha: SCSI driver HA context
1343  * @pkt: Entry pointer
1344  */
1345 static void
1346 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1347 {
1348         srb_t *sp;
1349
1350 #if defined(QL_DEBUG_LEVEL_2)
1351         if (pkt->entry_status & RF_INV_E_ORDER)
1352                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1353         else if (pkt->entry_status & RF_INV_E_COUNT)
1354                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1355         else if (pkt->entry_status & RF_INV_E_PARAM)
1356                 qla_printk(KERN_ERR, ha,
1357                     "%s: Invalid Entry Parameter\n", __func__);
1358         else if (pkt->entry_status & RF_INV_E_TYPE)
1359                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1360         else if (pkt->entry_status & RF_BUSY)
1361                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1362         else
1363                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1364 #endif
1365
1366         /* Validate handle. */
1367         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1368                 sp = ha->outstanding_cmds[pkt->handle];
1369         else
1370                 sp = NULL;
1371
1372         if (sp) {
1373                 /* Free outstanding command slot. */
1374                 ha->outstanding_cmds[pkt->handle] = NULL;
1375
1376                 /* Bad payload or header */
1377                 if (pkt->entry_status &
1378                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1379                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1380                         sp->cmd->result = DID_ERROR << 16;
1381                 } else if (pkt->entry_status & RF_BUSY) {
1382                         sp->cmd->result = DID_BUS_BUSY << 16;
1383                 } else {
1384                         sp->cmd->result = DID_ERROR << 16;
1385                 }
1386                 qla2x00_sp_compl(ha, sp);
1387
1388         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1389             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1390                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1391                     ha->host_no));
1392                 qla_printk(KERN_WARNING, ha,
1393                     "Error entry - invalid handle\n");
1394
1395                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1396                 qla2xxx_wake_dpc(ha);
1397         }
1398 }
1399
1400 /**
1401  * qla24xx_mbx_completion() - Process mailbox command completions.
1402  * @ha: SCSI driver HA context
1403  * @mb0: Mailbox0 register
1404  */
1405 static void
1406 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1407 {
1408         uint16_t        cnt;
1409         uint16_t __iomem *wptr;
1410         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1411
1412         /* Load return mailbox registers. */
1413         ha->flags.mbox_int = 1;
1414         ha->mailbox_out[0] = mb0;
1415         wptr = (uint16_t __iomem *)&reg->mailbox1;
1416
1417         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1418                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1419                 wptr++;
1420         }
1421
1422         if (ha->mcp) {
1423                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1424                     __func__, ha->host_no, ha->mcp->mb[0]));
1425         } else {
1426                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1427                     __func__, ha->host_no));
1428         }
1429 }
1430
1431 /**
1432  * qla24xx_process_response_queue() - Process response queue entries.
1433  * @ha: SCSI driver HA context
1434  */
1435 void
1436 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1437 {
1438         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1439         struct sts_entry_24xx *pkt;
1440
1441         if (!ha->flags.online)
1442                 return;
1443
1444         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1445                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1446
1447                 ha->rsp_ring_index++;
1448                 if (ha->rsp_ring_index == ha->response_q_length) {
1449                         ha->rsp_ring_index = 0;
1450                         ha->response_ring_ptr = ha->response_ring;
1451                 } else {
1452                         ha->response_ring_ptr++;
1453                 }
1454
1455                 if (pkt->entry_status != 0) {
1456                         DEBUG3(printk(KERN_INFO
1457                             "scsi(%ld): Process error entry.\n", ha->host_no));
1458
1459                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1460                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1461                         wmb();
1462                         continue;
1463                 }
1464
1465                 switch (pkt->entry_type) {
1466                 case STATUS_TYPE:
1467                         qla2x00_status_entry(ha, pkt);
1468                         break;
1469                 case STATUS_CONT_TYPE:
1470                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1471                         break;
1472                 case VP_RPT_ID_IOCB_TYPE:
1473                         qla24xx_report_id_acquisition(ha,
1474                             (struct vp_rpt_id_entry_24xx *)pkt);
1475                         break;
1476                 default:
1477                         /* Type Not Supported. */
1478                         DEBUG4(printk(KERN_WARNING
1479                             "scsi(%ld): Received unknown response pkt type %x "
1480                             "entry status=%x.\n",
1481                             ha->host_no, pkt->entry_type, pkt->entry_status));
1482                         break;
1483                 }
1484                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1485                 wmb();
1486         }
1487
1488         /* Adjust ring index */
1489         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1490 }
1491
1492 static void
1493 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1494 {
1495         int rval;
1496         uint32_t cnt;
1497         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1498
1499         if (!IS_QLA25XX(ha))
1500                 return;
1501
1502         rval = QLA_SUCCESS;
1503         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1504         RD_REG_DWORD(&reg->iobase_addr);
1505         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1506         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1507             rval == QLA_SUCCESS; cnt--) {
1508                 if (cnt) {
1509                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1510                         udelay(10);
1511                 } else
1512                         rval = QLA_FUNCTION_TIMEOUT;
1513         }
1514         if (rval == QLA_SUCCESS)
1515                 goto next_test;
1516
1517         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1518         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1519             rval == QLA_SUCCESS; cnt--) {
1520                 if (cnt) {
1521                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1522                         udelay(10);
1523                 } else
1524                         rval = QLA_FUNCTION_TIMEOUT;
1525         }
1526         if (rval != QLA_SUCCESS)
1527                 goto done;
1528
1529 next_test:
1530         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1531                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1532
1533 done:
1534         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1535         RD_REG_DWORD(&reg->iobase_window);
1536 }
1537
1538 /**
1539  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1540  * @irq:
1541  * @dev_id: SCSI driver HA context
1542  *
1543  * Called by system whenever the host adapter generates an interrupt.
1544  *
1545  * Returns handled flag.
1546  */
1547 irqreturn_t
1548 qla24xx_intr_handler(int irq, void *dev_id)
1549 {
1550         scsi_qla_host_t *ha;
1551         struct device_reg_24xx __iomem *reg;
1552         int             status;
1553         unsigned long   iter;
1554         uint32_t        stat;
1555         uint32_t        hccr;
1556         uint16_t        mb[4];
1557
1558         ha = (scsi_qla_host_t *) dev_id;
1559         if (!ha) {
1560                 printk(KERN_INFO
1561                     "%s(): NULL host pointer\n", __func__);
1562                 return IRQ_NONE;
1563         }
1564
1565         reg = &ha->iobase->isp24;
1566         status = 0;
1567
1568         spin_lock(&ha->hardware_lock);
1569         for (iter = 50; iter--; ) {
1570                 stat = RD_REG_DWORD(&reg->host_status);
1571                 if (stat & HSRX_RISC_PAUSED) {
1572                         if (pci_channel_offline(ha->pdev))
1573                                 break;
1574
1575                         if (ha->hw_event_pause_errors == 0)
1576                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1577                                     0, MSW(stat), LSW(stat));
1578                         else if (ha->hw_event_pause_errors < 0xffffffff)
1579                                 ha->hw_event_pause_errors++;
1580
1581                         hccr = RD_REG_DWORD(&reg->hccr);
1582
1583                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1584                             "Dumping firmware!\n", hccr);
1585
1586                         qla2xxx_check_risc_status(ha);
1587
1588                         ha->isp_ops->fw_dump(ha, 1);
1589                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1590                         break;
1591                 } else if ((stat & HSRX_RISC_INT) == 0)
1592                         break;
1593
1594                 switch (stat & 0xff) {
1595                 case 0x1:
1596                 case 0x2:
1597                 case 0x10:
1598                 case 0x11:
1599                         qla24xx_mbx_completion(ha, MSW(stat));
1600                         status |= MBX_INTERRUPT;
1601
1602                         break;
1603                 case 0x12:
1604                         mb[0] = MSW(stat);
1605                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1606                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1607                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1608                         qla2x00_async_event(ha, mb);
1609                         break;
1610                 case 0x13:
1611                         qla24xx_process_response_queue(ha);
1612                         break;
1613                 default:
1614                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1615                             "(%d).\n",
1616                             ha->host_no, stat & 0xff));
1617                         break;
1618                 }
1619                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1620                 RD_REG_DWORD_RELAXED(&reg->hccr);
1621         }
1622         spin_unlock(&ha->hardware_lock);
1623
1624         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1625             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1626                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1627                 complete(&ha->mbx_intr_comp);
1628         }
1629
1630         return IRQ_HANDLED;
1631 }
1632
1633 static irqreturn_t
1634 qla24xx_msix_rsp_q(int irq, void *dev_id)
1635 {
1636         scsi_qla_host_t *ha;
1637         struct device_reg_24xx __iomem *reg;
1638
1639         ha = dev_id;
1640         reg = &ha->iobase->isp24;
1641
1642         spin_lock(&ha->hardware_lock);
1643
1644         qla24xx_process_response_queue(ha);
1645         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1646
1647         spin_unlock(&ha->hardware_lock);
1648
1649         return IRQ_HANDLED;
1650 }
1651
1652 static irqreturn_t
1653 qla24xx_msix_default(int irq, void *dev_id)
1654 {
1655         scsi_qla_host_t *ha;
1656         struct device_reg_24xx __iomem *reg;
1657         int             status;
1658         uint32_t        stat;
1659         uint32_t        hccr;
1660         uint16_t        mb[4];
1661
1662         ha = dev_id;
1663         reg = &ha->iobase->isp24;
1664         status = 0;
1665
1666         spin_lock(&ha->hardware_lock);
1667         do {
1668                 stat = RD_REG_DWORD(&reg->host_status);
1669                 if (stat & HSRX_RISC_PAUSED) {
1670                         if (pci_channel_offline(ha->pdev))
1671                                 break;
1672
1673                         if (ha->hw_event_pause_errors == 0)
1674                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1675                                     0, MSW(stat), LSW(stat));
1676                         else if (ha->hw_event_pause_errors < 0xffffffff)
1677                                 ha->hw_event_pause_errors++;
1678
1679                         hccr = RD_REG_DWORD(&reg->hccr);
1680
1681                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1682                             "Dumping firmware!\n", hccr);
1683
1684                         qla2xxx_check_risc_status(ha);
1685
1686                         ha->isp_ops->fw_dump(ha, 1);
1687                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1688                         break;
1689                 } else if ((stat & HSRX_RISC_INT) == 0)
1690                         break;
1691
1692                 switch (stat & 0xff) {
1693                 case 0x1:
1694                 case 0x2:
1695                 case 0x10:
1696                 case 0x11:
1697                         qla24xx_mbx_completion(ha, MSW(stat));
1698                         status |= MBX_INTERRUPT;
1699
1700                         break;
1701                 case 0x12:
1702                         mb[0] = MSW(stat);
1703                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1704                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1705                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1706                         qla2x00_async_event(ha, mb);
1707                         break;
1708                 case 0x13:
1709                         qla24xx_process_response_queue(ha);
1710                         break;
1711                 default:
1712                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1713                             "(%d).\n",
1714                             ha->host_no, stat & 0xff));
1715                         break;
1716                 }
1717                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1718         } while (0);
1719         spin_unlock(&ha->hardware_lock);
1720
1721         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1722             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1723                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1724                 complete(&ha->mbx_intr_comp);
1725         }
1726
1727         return IRQ_HANDLED;
1728 }
1729
1730 /* Interrupt handling helpers. */
1731
1732 struct qla_init_msix_entry {
1733         uint16_t entry;
1734         uint16_t index;
1735         const char *name;
1736         irq_handler_t handler;
1737 };
1738
1739 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1740         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1741                 "qla2xxx (default)", qla24xx_msix_default },
1742
1743         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1744                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1745 };
1746
1747 static void
1748 qla24xx_disable_msix(scsi_qla_host_t *ha)
1749 {
1750         int i;
1751         struct qla_msix_entry *qentry;
1752
1753         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1754                 qentry = &ha->msix_entries[imsix_entries[i].index];
1755                 if (qentry->have_irq)
1756                         free_irq(qentry->msix_vector, ha);
1757         }
1758         pci_disable_msix(ha->pdev);
1759 }
1760
1761 static int
1762 qla24xx_enable_msix(scsi_qla_host_t *ha)
1763 {
1764         int i, ret;
1765         struct msix_entry entries[QLA_MSIX_ENTRIES];
1766         struct qla_msix_entry *qentry;
1767
1768         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1769                 entries[i].entry = imsix_entries[i].entry;
1770
1771         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1772         if (ret) {
1773                 qla_printk(KERN_WARNING, ha,
1774                     "MSI-X: Failed to enable support -- %d/%d\n",
1775                     QLA_MSIX_ENTRIES, ret);
1776                 goto msix_out;
1777         }
1778         ha->flags.msix_enabled = 1;
1779
1780         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1781                 qentry = &ha->msix_entries[imsix_entries[i].index];
1782                 qentry->msix_vector = entries[i].vector;
1783                 qentry->msix_entry = entries[i].entry;
1784                 qentry->have_irq = 0;
1785                 ret = request_irq(qentry->msix_vector,
1786                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1787                 if (ret) {
1788                         qla_printk(KERN_WARNING, ha,
1789                             "MSI-X: Unable to register handler -- %x/%d.\n",
1790                             imsix_entries[i].index, ret);
1791                         qla24xx_disable_msix(ha);
1792                         goto msix_out;
1793                 }
1794                 qentry->have_irq = 1;
1795         }
1796
1797 msix_out:
1798         return ret;
1799 }
1800
1801 int
1802 qla2x00_request_irqs(scsi_qla_host_t *ha)
1803 {
1804         int ret;
1805         device_reg_t __iomem *reg = ha->iobase;
1806
1807         /* If possible, enable MSI-X. */
1808         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1809                 goto skip_msix;
1810
1811         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1812             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1813                 DEBUG2(qla_printk(KERN_WARNING, ha,
1814                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1815                     ha->chip_revision, ha->fw_attributes));
1816
1817                 goto skip_msix;
1818         }
1819
1820         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1821             (ha->pdev->subsystem_device == 0x7040 ||
1822                 ha->pdev->subsystem_device == 0x7041 ||
1823                 ha->pdev->subsystem_device == 0x1705)) {
1824                 DEBUG2(qla_printk(KERN_WARNING, ha,
1825                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1826                     ha->pdev->subsystem_vendor,
1827                     ha->pdev->subsystem_device));
1828
1829                 goto skip_msi;
1830         }
1831
1832         ret = qla24xx_enable_msix(ha);
1833         if (!ret) {
1834                 DEBUG2(qla_printk(KERN_INFO, ha,
1835                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1836                     ha->fw_attributes));
1837                 goto clear_risc_ints;
1838         }
1839         qla_printk(KERN_WARNING, ha,
1840             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1841 skip_msix:
1842
1843         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1844                 goto skip_msi;
1845
1846         ret = pci_enable_msi(ha->pdev);
1847         if (!ret) {
1848                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1849                 ha->flags.msi_enabled = 1;
1850         }
1851 skip_msi:
1852
1853         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1854             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1855         if (ret) {
1856                 qla_printk(KERN_WARNING, ha,
1857                     "Failed to reserve interrupt %d already in use.\n",
1858                     ha->pdev->irq);
1859                 goto fail;
1860         }
1861         ha->flags.inta_enabled = 1;
1862         ha->host->irq = ha->pdev->irq;
1863 clear_risc_ints:
1864
1865         ha->isp_ops->disable_intrs(ha);
1866         spin_lock_irq(&ha->hardware_lock);
1867         if (IS_FWI2_CAPABLE(ha)) {
1868                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1869                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1870         } else {
1871                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1872                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1873                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1874         }
1875         spin_unlock_irq(&ha->hardware_lock);
1876         ha->isp_ops->enable_intrs(ha);
1877
1878 fail:
1879         return ret;
1880 }
1881
1882 void
1883 qla2x00_free_irqs(scsi_qla_host_t *ha)
1884 {
1885
1886         if (ha->flags.msix_enabled)
1887                 qla24xx_disable_msix(ha);
1888         else if (ha->flags.inta_enabled) {
1889                 free_irq(ha->host->irq, ha);
1890                 pci_disable_msi(ha->pdev);
1891         }
1892 }