drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <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   flags;
  37         unsigned long   iter;
  38         uint16_t        hccr;
  39         uint16_t        mb[4];
  40
  41         ha = (scsi_qla_host_t *) dev_id;
  42         if (!ha) {
  43                 printk(KERN_INFO
  44                     "%s(): NULL host pointer\n", __func__);
  45                 return (IRQ_NONE);
  46         }
  47
  48         reg = &ha->iobase->isp;
  49         status = 0;
  50
  51         spin_lock_irqsave(&ha->hardware_lock, flags);
  52         for (iter = 50; iter--; ) {
  53                 hccr = RD_REG_WORD(&reg->hccr);
  54                 if (hccr & HCCR_RISC_PAUSE) {
  55                         if (pci_channel_offline(ha->pdev))
  56                                 break;
  57
  58                         /*
  59                          * Issue a "HARD" reset in order for the RISC interrupt
  60                          * bit to be cleared.  Schedule a big hammmer to get
  61                          * out of the RISC PAUSED state.
  62                          */
  63                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  64                         RD_REG_WORD(&reg->hccr);
  65
  66                         ha->isp_ops->fw_dump(ha, 1);
  67                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  68                         break;
  69                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  70                         break;
  71
  72                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  73                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  74                         RD_REG_WORD(&reg->hccr);
  75
  76                         /* Get mailbox data. */
  77                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  78                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  79                                 qla2x00_mbx_completion(ha, mb[0]);
  80                                 status |= MBX_INTERRUPT;
  81                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  82                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  83                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  84                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  85                                 qla2x00_async_event(ha, mb);
  86                         } else {
  87                                 /*EMPTY*/
  88                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  89                                     "interrupt type (%d).\n",
  90                                     ha->host_no, mb[0]));
  91                         }
  92                         /* Release mailbox registers. */
  93                         WRT_REG_WORD(&reg->semaphore, 0);
  94                         RD_REG_WORD(&reg->semaphore);
  95                 } else {
  96                         qla2x00_process_response_queue(ha);
  97
  98                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  99                         RD_REG_WORD(&reg->hccr);
 100                 }
 101         }
 102         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 103
 104         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 105             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 106                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 107                 up(&ha->mbx_intr_sem);
 108         }
 109
 110         return (IRQ_HANDLED);
 111 }
 112
 113 /**
 114  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 115  * @irq:
 116  * @dev_id: SCSI driver HA context
 117  *
 118  * Called by system whenever the host adapter generates an interrupt.
 119  *
 120  * Returns handled flag.
 121  */
 122 irqreturn_t
 123 qla2300_intr_handler(int irq, void *dev_id)
 124 {
 125         scsi_qla_host_t *ha;
 126         struct device_reg_2xxx __iomem *reg;
 127         int             status;
 128         unsigned long   flags;
 129         unsigned long   iter;
 130         uint32_t        stat;
 131         uint16_t        hccr;
 132         uint16_t        mb[4];
 133
 134         ha = (scsi_qla_host_t *) dev_id;
 135         if (!ha) {
 136                 printk(KERN_INFO
 137                     "%s(): NULL host pointer\n", __func__);
 138                 return (IRQ_NONE);
 139         }
 140
 141         reg = &ha->iobase->isp;
 142         status = 0;
 143
 144         spin_lock_irqsave(&ha->hardware_lock, flags);
 145         for (iter = 50; iter--; ) {
 146                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 147                 if (stat & HSR_RISC_PAUSED) {
 148                         if (pci_channel_offline(ha->pdev))
 149                                 break;
 150
 151                         hccr = RD_REG_WORD(&reg->hccr);
 152                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 153                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 154                                     "HCCR=%x, Dumping firmware!\n", hccr);
 155                         else
 156                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 157                                     "HCCR=%x, Dumping firmware!\n", hccr);
 158
 159                         /*
 160                          * Issue a "HARD" reset in order for the RISC
 161                          * interrupt bit to be cleared.  Schedule a big
 162                          * hammmer to get out of the RISC PAUSED state.
 163                          */
 164                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 165                         RD_REG_WORD(&reg->hccr);
 166
 167                         ha->isp_ops->fw_dump(ha, 1);
 168                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 169                         break;
 170                 } else if ((stat & HSR_RISC_INT) == 0)
 171                         break;
 172
 173                 switch (stat & 0xff) {
 174                 case 0x1:
 175                 case 0x2:
 176                 case 0x10:
 177                 case 0x11:
 178                         qla2x00_mbx_completion(ha, MSW(stat));
 179                         status |= MBX_INTERRUPT;
 180
 181                         /* Release mailbox registers. */
 182                         WRT_REG_WORD(&reg->semaphore, 0);
 183                         break;
 184                 case 0x12:
 185                         mb[0] = MSW(stat);
 186                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 187                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 188                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 189                         qla2x00_async_event(ha, mb);
 190                         break;
 191                 case 0x13:
 192                         qla2x00_process_response_queue(ha);
 193                         break;
 194                 case 0x15:
 195                         mb[0] = MBA_CMPLT_1_16BIT;
 196                         mb[1] = MSW(stat);
 197                         qla2x00_async_event(ha, mb);
 198                         break;
 199                 case 0x16:
 200                         mb[0] = MBA_SCSI_COMPLETION;
 201                         mb[1] = MSW(stat);
 202                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 203                         qla2x00_async_event(ha, mb);
 204                         break;
 205                 default:
 206                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 207                             "(%d).\n",
 208                             ha->host_no, stat & 0xff));
 209                         break;
 210                 }
 211                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 212                 RD_REG_WORD_RELAXED(&reg->hccr);
 213         }
 214         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 215
 216         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 217             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 218                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 219                 up(&ha->mbx_intr_sem);
 220         }
 221
 222         return (IRQ_HANDLED);
 223 }
 224
 225 /**
 226  * qla2x00_mbx_completion() - Process mailbox command completions.
 227  * @ha: SCSI driver HA context
 228  * @mb0: Mailbox0 register
 229  */
 230 static void
 231 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 232 {
 233         uint16_t        cnt;
 234         uint16_t __iomem *wptr;
 235         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 236
 237         /* Load return mailbox registers. */
 238         ha->flags.mbox_int = 1;
 239         ha->mailbox_out[0] = mb0;
 240         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 241
 242         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 243                 if (IS_QLA2200(ha) && cnt == 8)
 244                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 245                 if (cnt == 4 || cnt == 5)
 246                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 247                 else
 248                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 249
 250                 wptr++;
 251         }
 252
 253         if (ha->mcp) {
 254                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 255                     __func__, ha->host_no, ha->mcp->mb[0]));
 256         } else {
 257                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 258                     __func__, ha->host_no));
 259         }
 260 }
 261
 262 /**
 263  * qla2x00_async_event() - Process aynchronous events.
 264  * @ha: SCSI driver HA context
 265  * @mb: Mailbox registers (0 - 3)
 266  */
 267 void
 268 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 269 {
 270 #define LS_UNKNOWN      2
 271         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 272         char            *link_speed;
 273         uint16_t        handle_cnt;
 274         uint16_t        cnt;
 275         uint32_t        handles[5];
 276         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 277         uint32_t        rscn_entry, host_pid;
 278         uint8_t         rscn_queue_index;
 279
 280         /* Setup to process RIO completion. */
 281         handle_cnt = 0;
 282         switch (mb[0]) {
 283         case MBA_SCSI_COMPLETION:
 284                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 285                 handle_cnt = 1;
 286                 break;
 287         case MBA_CMPLT_1_16BIT:
 288                 handles[0] = mb[1];
 289                 handle_cnt = 1;
 290                 mb[0] = MBA_SCSI_COMPLETION;
 291                 break;
 292         case MBA_CMPLT_2_16BIT:
 293                 handles[0] = mb[1];
 294                 handles[1] = mb[2];
 295                 handle_cnt = 2;
 296                 mb[0] = MBA_SCSI_COMPLETION;
 297                 break;
 298         case MBA_CMPLT_3_16BIT:
 299                 handles[0] = mb[1];
 300                 handles[1] = mb[2];
 301                 handles[2] = mb[3];
 302                 handle_cnt = 3;
 303                 mb[0] = MBA_SCSI_COMPLETION;
 304                 break;
 305         case MBA_CMPLT_4_16BIT:
 306                 handles[0] = mb[1];
 307                 handles[1] = mb[2];
 308                 handles[2] = mb[3];
 309                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 310                 handle_cnt = 4;
 311                 mb[0] = MBA_SCSI_COMPLETION;
 312                 break;
 313         case MBA_CMPLT_5_16BIT:
 314                 handles[0] = mb[1];
 315                 handles[1] = mb[2];
 316                 handles[2] = mb[3];
 317                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 318                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 319                 handle_cnt = 5;
 320                 mb[0] = MBA_SCSI_COMPLETION;
 321                 break;
 322         case MBA_CMPLT_2_32BIT:
 323                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 324                 handles[1] = le32_to_cpu(
 325                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 326                     RD_MAILBOX_REG(ha, reg, 6));
 327                 handle_cnt = 2;
 328                 mb[0] = MBA_SCSI_COMPLETION;
 329                 break;
 330         default:
 331                 break;
 332         }
 333
 334         switch (mb[0]) {
 335         case MBA_SCSI_COMPLETION:       /* Fast Post */
 336                 if (!ha->flags.online)
 337                         break;
 338
 339                 for (cnt = 0; cnt < handle_cnt; cnt++)
 340                         qla2x00_process_completed_request(ha, handles[cnt]);
 341                 break;
 342
 343         case MBA_RESET:                 /* Reset */
 344                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 345
 346                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 347                 break;
 348
 349         case MBA_SYSTEM_ERR:            /* System Error */
 350                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 351                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 352                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 353
 354                 qla_printk(KERN_INFO, ha,
 355                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 356                     mb[1], mb[2], mb[3]);
 357
 358                 ha->isp_ops->fw_dump(ha, 1);
 359
 360                 if (IS_FWI2_CAPABLE(ha)) {
 361                         if (mb[1] == 0 && mb[2] == 0) {
 362                                 qla_printk(KERN_ERR, ha,
 363                                     "Unrecoverable Hardware Error: adapter "
 364                                     "marked OFFLINE!\n");
 365                                 ha->flags.online = 0;
 366                         } else
 367                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 368                 } else if (mb[1] == 0) {
 369                         qla_printk(KERN_INFO, ha,
 370                             "Unrecoverable Hardware Error: adapter marked "
 371                             "OFFLINE!\n");
 372                         ha->flags.online = 0;
 373                 } else
 374                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 375                 break;
 376
 377         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 378                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 379                     ha->host_no));
 380                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 381
 382                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 383                 break;
 384
 385         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 386                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 387                     ha->host_no));
 388                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 389
 390                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 391                 break;
 392
 393         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 394                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 395                     ha->host_no));
 396                 break;
 397
 398         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 399                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 400                     mb[1]));
 401                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 402
 403                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 404                         atomic_set(&ha->loop_state, LOOP_DOWN);
 405                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 406                         qla2x00_mark_all_devices_lost(ha, 1);
 407                 }
 408
 409                 if (ha->parent) {
 410                         atomic_set(&ha->vp_state, VP_FAILED);
 411                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 412                 }
 413
 414                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 415
 416                 ha->flags.management_server_logged_in = 0;
 417                 break;
 418
 419         case MBA_LOOP_UP:               /* Loop Up Event */
 420                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 421                         link_speed = link_speeds[0];
 422                         ha->link_data_rate = PORT_SPEED_1GB;
 423                 } else {
 424                         link_speed = link_speeds[LS_UNKNOWN];
 425                         if (mb[1] < 5)
 426                                 link_speed = link_speeds[mb[1]];
 427                         ha->link_data_rate = mb[1];
 428                 }
 429
 430                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 431                     ha->host_no, link_speed));
 432                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 433                     link_speed);
 434
 435                 ha->flags.management_server_logged_in = 0;
 436                 break;
 437
 438         case MBA_LOOP_DOWN:             /* Loop Down Event */
 439                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 440                     ha->host_no, mb[1]));
 441                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 442
 443                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 444                         atomic_set(&ha->loop_state, LOOP_DOWN);
 445                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 446                         ha->device_flags |= DFLG_NO_CABLE;
 447                         qla2x00_mark_all_devices_lost(ha, 1);
 448                 }
 449
 450                 if (ha->parent) {
 451                         atomic_set(&ha->vp_state, VP_FAILED);
 452                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 453                 }
 454
 455                 ha->flags.management_server_logged_in = 0;
 456                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 457                 if (ql2xfdmienable)
 458                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 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                 break;
 483
 484         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 485                 if (IS_QLA2100(ha))
 486                         break;
 487
 488                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 489                     ha->host_no));
 490
 491                 /*
 492                  * Until there's a transition from loop down to loop up, treat
 493                  * this as loop down only.
 494                  */
 495                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 496                         atomic_set(&ha->loop_state, LOOP_DOWN);
 497                         if (!atomic_read(&ha->loop_down_timer))
 498                                 atomic_set(&ha->loop_down_timer,
 499                                     LOOP_DOWN_TIME);
 500                         qla2x00_mark_all_devices_lost(ha, 1);
 501                 }
 502
 503                 if (ha->parent) {
 504                         atomic_set(&ha->vp_state, VP_FAILED);
 505                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 506                 }
 507
 508                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 509                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 510                 }
 511                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 512
 513                 ha->flags.gpsc_supported = 1;
 514                 ha->flags.management_server_logged_in = 0;
 515                 break;
 516
 517         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 518                 if (IS_QLA2100(ha))
 519                         break;
 520
 521                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 522                     "received.\n",
 523                     ha->host_no));
 524                 qla_printk(KERN_INFO, ha,
 525                     "Configuration change detected: value=%x.\n", mb[1]);
 526
 527                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 528                         atomic_set(&ha->loop_state, LOOP_DOWN);
 529                         if (!atomic_read(&ha->loop_down_timer))
 530                                 atomic_set(&ha->loop_down_timer,
 531                                     LOOP_DOWN_TIME);
 532                         qla2x00_mark_all_devices_lost(ha, 1);
 533                 }
 534
 535                 if (ha->parent) {
 536                         atomic_set(&ha->vp_state, VP_FAILED);
 537                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 538                 }
 539
 540                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 541                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 542                 break;
 543
 544         case MBA_PORT_UPDATE:           /* Port database update */
 545                 /*
 546                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 547                  * event etc. earlier indicating loop is down) then process
 548                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 549                  */
 550                 atomic_set(&ha->loop_down_timer, 0);
 551                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 552                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 553                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 554                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 555                             mb[2], mb[3]));
 556                         break;
 557                 }
 558
 559                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 560                     ha->host_no));
 561                 DEBUG(printk(KERN_INFO
 562                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 563                     ha->host_no, mb[1], mb[2], mb[3]));
 564
 565                 /*
 566                  * Mark all devices as missing so we will login again.
 567                  */
 568                 atomic_set(&ha->loop_state, LOOP_UP);
 569
 570                 qla2x00_mark_all_devices_lost(ha, 1);
 571
 572                 ha->flags.rscn_queue_overflow = 1;
 573
 574                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 575                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 576                 break;
 577
 578         case MBA_RSCN_UPDATE:           /* State Change Registration */
 579                 /* Check if the Vport has issued a SCR */
 580                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 581                         break;
 582
 583                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 584                     ha->host_no));
 585                 DEBUG(printk(KERN_INFO
 586                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 587                     ha->host_no, mb[1], mb[2]));
 588
 589                 rscn_entry = (mb[1] << 16) | mb[2];
 590                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 591                     ha->d_id.b.al_pa;
 592                 if (rscn_entry == host_pid) {
 593                         DEBUG(printk(KERN_INFO
 594                             "scsi(%ld): Ignoring RSCN update to local host "
 595                             "port ID (%06x)\n",
 596                             ha->host_no, host_pid));
 597                         break;
 598                 }
 599
 600                 rscn_queue_index = ha->rscn_in_ptr + 1;
 601                 if (rscn_queue_index == MAX_RSCN_COUNT)
 602                         rscn_queue_index = 0;
 603                 if (rscn_queue_index != ha->rscn_out_ptr) {
 604                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 605                         ha->rscn_in_ptr = rscn_queue_index;
 606                 } else {
 607                         ha->flags.rscn_queue_overflow = 1;
 608                 }
 609
 610                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 611                 atomic_set(&ha->loop_down_timer, 0);
 612                 ha->flags.management_server_logged_in = 0;
 613
 614                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 615                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 616                 break;
 617
 618         /* case MBA_RIO_RESPONSE: */
 619         case MBA_ZIO_RESPONSE:
 620                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 621                     ha->host_no));
 622                 DEBUG(printk(KERN_INFO
 623                     "scsi(%ld): [R|Z]IO update completion.\n",
 624                     ha->host_no));
 625
 626                 if (IS_FWI2_CAPABLE(ha))
 627                         qla24xx_process_response_queue(ha);
 628                 else
 629                         qla2x00_process_response_queue(ha);
 630                 break;
 631
 632         case MBA_DISCARD_RND_FRAME:
 633                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 634                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 635                 break;
 636
 637         case MBA_TRACE_NOTIFICATION:
 638                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 639                 ha->host_no, mb[1], mb[2]));
 640                 break;
 641         }
 642
 643         if (!ha->parent && ha->num_vhosts)
 644                 qla2x00_alert_all_vps(ha, mb);
 645 }
 646
 647 static void
 648 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 649 {
 650         fc_port_t *fcport = data;
 651
 652         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 653                 return;
 654
 655         if (sdev->ordered_tags)
 656                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 657                     sdev->queue_depth + 1);
 658         else
 659                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 660                     sdev->queue_depth + 1);
 661
 662         fcport->last_ramp_up = jiffies;
 663
 664         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 665             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 666             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 667             sdev->queue_depth));
 668 }
 669
 670 static void
 671 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 672 {
 673         fc_port_t *fcport = data;
 674
 675         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 676                 return;
 677
 678         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 679             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 680             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 681             sdev->queue_depth));
 682 }
 683
 684 static inline void
 685 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 686 {
 687         fc_port_t *fcport;
 688         struct scsi_device *sdev;
 689
 690         sdev = sp->cmd->device;
 691         if (sdev->queue_depth >= ha->max_q_depth)
 692                 return;
 693
 694         fcport = sp->fcport;
 695         if (time_before(jiffies,
 696             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 697                 return;
 698         if (time_before(jiffies,
 699             fcport->last_queue_full + ql2xqfullrampup * HZ))
 700                 return;
 701
 702         starget_for_each_device(sdev->sdev_target, fcport,
 703             qla2x00_adjust_sdev_qdepth_up);
 704 }
 705
 706 /**
 707  * qla2x00_process_completed_request() - Process a Fast Post response.
 708  * @ha: SCSI driver HA context
 709  * @index: SRB index
 710  */
 711 static void
 712 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 713 {
 714         srb_t *sp;
 715
 716         /* Validate handle. */
 717         if (index >= MAX_OUTSTANDING_COMMANDS) {
 718                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 719                     ha->host_no, index));
 720                 qla_printk(KERN_WARNING, ha,
 721                     "Invalid SCSI completion handle %d.\n", index);
 722
 723                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 724                 return;
 725         }
 726
 727         sp = ha->outstanding_cmds[index];
 728         if (sp) {
 729                 /* Free outstanding command slot. */
 730                 ha->outstanding_cmds[index] = NULL;
 731
 732                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 733                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 734
 735                 /* Save ISP completion status */
 736                 sp->cmd->result = DID_OK << 16;
 737
 738                 qla2x00_ramp_up_queue_depth(ha, sp);
 739                 qla2x00_sp_compl(ha, sp);
 740         } else {
 741                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 742                     ha->host_no));
 743                 qla_printk(KERN_WARNING, ha,
 744                     "Invalid ISP SCSI completion handle\n");
 745
 746                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 747         }
 748 }
 749
 750 /**
 751  * qla2x00_process_response_queue() - Process response queue entries.
 752  * @ha: SCSI driver HA context
 753  */
 754 void
 755 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 756 {
 757         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 758         sts_entry_t     *pkt;
 759         uint16_t        handle_cnt;
 760         uint16_t        cnt;
 761
 762         if (!ha->flags.online)
 763                 return;
 764
 765         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 766                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 767
 768                 ha->rsp_ring_index++;
 769                 if (ha->rsp_ring_index == ha->response_q_length) {
 770                         ha->rsp_ring_index = 0;
 771                         ha->response_ring_ptr = ha->response_ring;
 772                 } else {
 773                         ha->response_ring_ptr++;
 774                 }
 775
 776                 if (pkt->entry_status != 0) {
 777                         DEBUG3(printk(KERN_INFO
 778                             "scsi(%ld): Process error entry.\n", ha->host_no));
 779
 780                         qla2x00_error_entry(ha, pkt);
 781                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 782                         wmb();
 783                         continue;
 784                 }
 785
 786                 switch (pkt->entry_type) {
 787                 case STATUS_TYPE:
 788                         qla2x00_status_entry(ha, pkt);
 789                         break;
 790                 case STATUS_TYPE_21:
 791                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 792                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 793                                 qla2x00_process_completed_request(ha,
 794                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 795                         }
 796                         break;
 797                 case STATUS_TYPE_22:
 798                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 799                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 800                                 qla2x00_process_completed_request(ha,
 801                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 802                         }
 803                         break;
 804                 case STATUS_CONT_TYPE:
 805                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 806                         break;
 807                 case MS_IOCB_TYPE:
 808                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 809                         break;
 810                 default:
 811                         /* Type Not Supported. */
 812                         DEBUG4(printk(KERN_WARNING
 813                             "scsi(%ld): Received unknown response pkt type %x "
 814                             "entry status=%x.\n",
 815                             ha->host_no, pkt->entry_type, pkt->entry_status));
 816                         break;
 817                 }
 818                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 819                 wmb();
 820         }
 821
 822         /* Adjust ring index */
 823         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 824 }
 825
 826 /**
 827  * qla2x00_status_entry() - Process a Status IOCB entry.
 828  * @ha: SCSI driver HA context
 829  * @pkt: Entry pointer
 830  */
 831 static void
 832 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 833 {
 834         srb_t           *sp;
 835         fc_port_t       *fcport;
 836         struct scsi_cmnd *cp;
 837         sts_entry_t *sts;
 838         struct sts_entry_24xx *sts24;
 839         uint16_t        comp_status;
 840         uint16_t        scsi_status;
 841         uint8_t         lscsi_status;
 842         int32_t         resid;
 843         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 844         uint8_t         *rsp_info, *sense_data;
 845
 846         sts = (sts_entry_t *) pkt;
 847         sts24 = (struct sts_entry_24xx *) pkt;
 848         if (IS_FWI2_CAPABLE(ha)) {
 849                 comp_status = le16_to_cpu(sts24->comp_status);
 850                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 851         } else {
 852                 comp_status = le16_to_cpu(sts->comp_status);
 853                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 854         }
 855
 856         /* Fast path completion. */
 857         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 858                 qla2x00_process_completed_request(ha, sts->handle);
 859
 860                 return;
 861         }
 862
 863         /* Validate handle. */
 864         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 865                 sp = ha->outstanding_cmds[sts->handle];
 866                 ha->outstanding_cmds[sts->handle] = NULL;
 867         } else
 868                 sp = NULL;
 869
 870         if (sp == NULL) {
 871                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 872                     ha->host_no));
 873                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 874
 875                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 876                 qla2xxx_wake_dpc(ha);
 877                 return;
 878         }
 879         cp = sp->cmd;
 880         if (cp == NULL) {
 881                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 882                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 883                 qla_printk(KERN_WARNING, ha,
 884                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 885
 886                 return;
 887         }
 888
 889         lscsi_status = scsi_status & STATUS_MASK;
 890         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 891         CMD_COMPL_STATUS(cp) = comp_status;
 892         CMD_SCSI_STATUS(cp) = scsi_status;
 893
 894         fcport = sp->fcport;
 895
 896         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 897         if (IS_FWI2_CAPABLE(ha)) {
 898                 sense_len = le32_to_cpu(sts24->sense_len);
 899                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 900                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 901                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 902                 rsp_info = sts24->data;
 903                 sense_data = sts24->data;
 904                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 905         } else {
 906                 sense_len = le16_to_cpu(sts->req_sense_length);
 907                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 908                 resid_len = le32_to_cpu(sts->residual_length);
 909                 rsp_info = sts->rsp_info;
 910                 sense_data = sts->req_sense_data;
 911         }
 912
 913         /* Check for any FCP transport errors. */
 914         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 915                 /* Sense data lies beyond any FCP RESPONSE data. */
 916                 if (IS_FWI2_CAPABLE(ha))
 917                         sense_data += rsp_info_len;
 918                 if (rsp_info_len > 3 && rsp_info[3]) {
 919                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 920                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 921                             "retrying command\n", ha->host_no,
 922                             cp->device->channel, cp->device->id,
 923                             cp->device->lun, rsp_info_len, rsp_info[0],
 924                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 925                             rsp_info[5], rsp_info[6], rsp_info[7]));
 926
 927                         cp->result = DID_BUS_BUSY << 16;
 928                         qla2x00_sp_compl(ha, sp);
 929                         return;
 930                 }
 931         }
 932
 933         /*
 934          * Based on Host and scsi status generate status code for Linux
 935          */
 936         switch (comp_status) {
 937         case CS_COMPLETE:
 938         case CS_QUEUE_FULL:
 939                 if (scsi_status == 0) {
 940                         cp->result = DID_OK << 16;
 941                         break;
 942                 }
 943                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 944                         resid = resid_len;
 945                         scsi_set_resid(cp, resid);
 946                         CMD_RESID_LEN(cp) = resid;
 947
 948                         if (!lscsi_status &&
 949                             ((unsigned)(scsi_bufflen(cp) - resid) <
 950                              cp->underflow)) {
 951                                 qla_printk(KERN_INFO, ha,
 952                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 953                                            "detected (%x of %x bytes)...returning "
 954                                            "error status.\n", ha->host_no,
 955                                            cp->device->channel, cp->device->id,
 956                                            cp->device->lun, resid,
 957                                            scsi_bufflen(cp));
 958
 959                                 cp->result = DID_ERROR << 16;
 960                                 break;
 961                         }
 962                 }
 963                 cp->result = DID_OK << 16 | lscsi_status;
 964
 965                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 966                         DEBUG2(printk(KERN_INFO
 967                             "scsi(%ld): QUEUE FULL status detected "
 968                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 969                             scsi_status));
 970
 971                         /* Adjust queue depth for all luns on the port. */
 972                         fcport->last_queue_full = jiffies;
 973                         starget_for_each_device(cp->device->sdev_target,
 974                             fcport, qla2x00_adjust_sdev_qdepth_down);
 975                         break;
 976                 }
 977                 if (lscsi_status != SS_CHECK_CONDITION)
 978                         break;
 979
 980                 /* Copy Sense Data into sense buffer. */
 981                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 982
 983                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 984                         break;
 985
 986                 if (sense_len >= sizeof(cp->sense_buffer))
 987                         sense_len = sizeof(cp->sense_buffer);
 988
 989                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 990                 sp->request_sense_length = sense_len;
 991                 sp->request_sense_ptr = cp->sense_buffer;
 992
 993                 if (sp->request_sense_length > 32)
 994                         sense_len = 32;
 995
 996                 memcpy(cp->sense_buffer, sense_data, sense_len);
 997
 998                 sp->request_sense_ptr += sense_len;
 999                 sp->request_sense_length -= sense_len;
1000                 if (sp->request_sense_length != 0)
1001                         ha->status_srb = sp;
1002
1003                 DEBUG5(printk("%s(): Check condition Sense data, "
1004                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
1005                     ha->host_no, cp->device->channel, cp->device->id,
1006                     cp->device->lun, cp, cp->serial_number));
1007                 if (sense_len)
1008                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1009                             CMD_ACTUAL_SNSLEN(cp)));
1010                 break;
1011
1012         case CS_DATA_UNDERRUN:
1013                 resid = resid_len;
1014                 /* Use F/W calculated residual length. */
1015                 if (IS_FWI2_CAPABLE(ha))
1016                         resid = fw_resid_len;
1017
1018                 if (scsi_status & SS_RESIDUAL_UNDER) {
1019                         scsi_set_resid(cp, resid);
1020                         CMD_RESID_LEN(cp) = resid;
1021                 } else {
1022                         DEBUG2(printk(KERN_INFO
1023                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1024                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1025                             "os_underflow=0x%x\n", ha->host_no,
1026                             cp->device->id, cp->device->lun, comp_status,
1027                             scsi_status, resid_len, resid, cp->cmnd[0],
1028                             cp->underflow));
1029
1030                 }
1031
1032                 /*
1033                  * Check to see if SCSI Status is non zero. If so report SCSI
1034                  * Status.
1035                  */
1036                 if (lscsi_status != 0) {
1037                         cp->result = DID_OK << 16 | lscsi_status;
1038
1039                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1040                                 DEBUG2(printk(KERN_INFO
1041                                     "scsi(%ld): QUEUE FULL status detected "
1042                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1043                                     scsi_status));
1044
1045                                 /*
1046                                  * Adjust queue depth for all luns on the
1047                                  * port.
1048                                  */
1049                                 fcport->last_queue_full = jiffies;
1050                                 starget_for_each_device(
1051                                     cp->device->sdev_target, fcport,
1052                                     qla2x00_adjust_sdev_qdepth_down);
1053                                 break;
1054                         }
1055                         if (lscsi_status != SS_CHECK_CONDITION)
1056                                 break;
1057
1058                         /* Copy Sense Data into sense buffer */
1059                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1060
1061                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1062                                 break;
1063
1064                         if (sense_len >= sizeof(cp->sense_buffer))
1065                                 sense_len = sizeof(cp->sense_buffer);
1066
1067                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1068                         sp->request_sense_length = sense_len;
1069                         sp->request_sense_ptr = cp->sense_buffer;
1070
1071                         if (sp->request_sense_length > 32)
1072                                 sense_len = 32;
1073
1074                         memcpy(cp->sense_buffer, sense_data, sense_len);
1075
1076                         sp->request_sense_ptr += sense_len;
1077                         sp->request_sense_length -= sense_len;
1078                         if (sp->request_sense_length != 0)
1079                                 ha->status_srb = sp;
1080
1081                         DEBUG5(printk("%s(): Check condition Sense data, "
1082                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1083                             __func__, ha->host_no, cp->device->channel,
1084                             cp->device->id, cp->device->lun, cp,
1085                             cp->serial_number));
1086
1087                         /*
1088                          * In case of a Underrun condition, set both the lscsi
1089                          * status and the completion status to appropriate
1090                          * values.
1091                          */
1092                         if (resid &&
1093                             ((unsigned)(scsi_bufflen(cp) - resid) <
1094                              cp->underflow)) {
1095                                 DEBUG2(qla_printk(KERN_INFO, ha,
1096                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1097                                     "detected (%x of %x bytes)...returning "
1098                                     "error status.\n", ha->host_no,
1099                                     cp->device->channel, cp->device->id,
1100                                     cp->device->lun, resid,
1101                                     scsi_bufflen(cp)));
1102
1103                                 cp->result = DID_ERROR << 16 | lscsi_status;
1104                         }
1105
1106                         if (sense_len)
1107                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1108                                     CMD_ACTUAL_SNSLEN(cp)));
1109                 } else {
1110                         /*
1111                          * If RISC reports underrun and target does not report
1112                          * it then we must have a lost frame, so tell upper
1113                          * layer to retry it by reporting a bus busy.
1114                          */
1115                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1116                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1117                                               "frame(s) detected (%x of %x bytes)..."
1118                                               "retrying command.\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_BUS_BUSY << 16;
1124                                 break;
1125                         }
1126
1127                         /* Handle mid-layer underflow */
1128                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1129                             cp->underflow) {
1130                                 qla_printk(KERN_INFO, ha,
1131                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1132                                            "detected (%x of %x bytes)...returning "
1133                                            "error status.\n", ha->host_no,
1134                                            cp->device->channel, cp->device->id,
1135                                            cp->device->lun, resid,
1136                                            scsi_bufflen(cp));
1137
1138                                 cp->result = DID_ERROR << 16;
1139                                 break;
1140                         }
1141
1142                         /* Everybody online, looking good... */
1143                         cp->result = DID_OK << 16;
1144                 }
1145                 break;
1146
1147         case CS_DATA_OVERRUN:
1148                 DEBUG2(printk(KERN_INFO
1149                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1150                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1151                     scsi_status));
1152                 DEBUG2(printk(KERN_INFO
1153                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1154                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1155                     cp->cmnd[4], cp->cmnd[5]));
1156                 DEBUG2(printk(KERN_INFO
1157                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1158                     "status!\n",
1159                     cp->serial_number, scsi_bufflen(cp), resid_len));
1160
1161                 cp->result = DID_ERROR << 16;
1162                 break;
1163
1164         case CS_PORT_LOGGED_OUT:
1165         case CS_PORT_CONFIG_CHG:
1166         case CS_PORT_BUSY:
1167         case CS_INCOMPLETE:
1168         case CS_PORT_UNAVAILABLE:
1169                 /*
1170                  * If the port is in Target Down state, return all IOs for this
1171                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1172                  * retry_queue.
1173                  */
1174                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1175                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1176                     ha->host_no, cp->device->id, cp->device->lun,
1177                     cp->serial_number, comp_status,
1178                     atomic_read(&fcport->state)));
1179
1180                 cp->result = DID_BUS_BUSY << 16;
1181                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1182                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1183                 }
1184                 break;
1185
1186         case CS_RESET:
1187                 DEBUG2(printk(KERN_INFO
1188                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1189                     ha->host_no, comp_status, scsi_status));
1190
1191                 cp->result = DID_RESET << 16;
1192                 break;
1193
1194         case CS_ABORTED:
1195                 /*
1196                  * hv2.19.12 - DID_ABORT does not retry the request if we
1197                  * aborted this request then abort otherwise it must be a
1198                  * reset.
1199                  */
1200                 DEBUG2(printk(KERN_INFO
1201                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1202                     ha->host_no, comp_status, scsi_status));
1203
1204                 cp->result = DID_RESET << 16;
1205                 break;
1206
1207         case CS_TIMEOUT:
1208                 cp->result = DID_BUS_BUSY << 16;
1209
1210                 if (IS_FWI2_CAPABLE(ha)) {
1211                         DEBUG2(printk(KERN_INFO
1212                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1213                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1214                             cp->device->id, cp->device->lun, comp_status,
1215                             scsi_status));
1216                         break;
1217                 }
1218                 DEBUG2(printk(KERN_INFO
1219                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1220                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1221                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1222                     le16_to_cpu(sts->status_flags)));
1223
1224                 /* Check to see if logout occurred. */
1225                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1226                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1227                 break;
1228
1229         default:
1230                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1231                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1232                 qla_printk(KERN_INFO, ha,
1233                     "Unknown status detected 0x%x-0x%x.\n",
1234                     comp_status, scsi_status);
1235
1236                 cp->result = DID_ERROR << 16;
1237                 break;
1238         }
1239
1240         /* Place command on done queue. */
1241         if (ha->status_srb == NULL)
1242                 qla2x00_sp_compl(ha, sp);
1243 }
1244
1245 /**
1246  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1247  * @ha: SCSI driver HA context
1248  * @pkt: Entry pointer
1249  *
1250  * Extended sense data.
1251  */
1252 static void
1253 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1254 {
1255         uint8_t         sense_sz = 0;
1256         srb_t           *sp = ha->status_srb;
1257         struct scsi_cmnd *cp;
1258
1259         if (sp != NULL && sp->request_sense_length != 0) {
1260                 cp = sp->cmd;
1261                 if (cp == NULL) {
1262                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1263                             "sp=%p.\n", __func__, sp));
1264                         qla_printk(KERN_INFO, ha,
1265                             "cmd is NULL: already returned to OS (sp=%p)\n",
1266                             sp);
1267
1268                         ha->status_srb = NULL;
1269                         return;
1270                 }
1271
1272                 if (sp->request_sense_length > sizeof(pkt->data)) {
1273                         sense_sz = sizeof(pkt->data);
1274                 } else {
1275                         sense_sz = sp->request_sense_length;
1276                 }
1277
1278                 /* Move sense data. */
1279                 if (IS_FWI2_CAPABLE(ha))
1280                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1281                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1282                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1283
1284                 sp->request_sense_ptr += sense_sz;
1285                 sp->request_sense_length -= sense_sz;
1286
1287                 /* Place command on done queue. */
1288                 if (sp->request_sense_length == 0) {
1289                         ha->status_srb = NULL;
1290                         qla2x00_sp_compl(ha, sp);
1291                 }
1292         }
1293 }
1294
1295 /**
1296  * qla2x00_error_entry() - Process an error entry.
1297  * @ha: SCSI driver HA context
1298  * @pkt: Entry pointer
1299  */
1300 static void
1301 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1302 {
1303         srb_t *sp;
1304
1305 #if defined(QL_DEBUG_LEVEL_2)
1306         if (pkt->entry_status & RF_INV_E_ORDER)
1307                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1308         else if (pkt->entry_status & RF_INV_E_COUNT)
1309                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1310         else if (pkt->entry_status & RF_INV_E_PARAM)
1311                 qla_printk(KERN_ERR, ha,
1312                     "%s: Invalid Entry Parameter\n", __func__);
1313         else if (pkt->entry_status & RF_INV_E_TYPE)
1314                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1315         else if (pkt->entry_status & RF_BUSY)
1316                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1317         else
1318                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1319 #endif
1320
1321         /* Validate handle. */
1322         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1323                 sp = ha->outstanding_cmds[pkt->handle];
1324         else
1325                 sp = NULL;
1326
1327         if (sp) {
1328                 /* Free outstanding command slot. */
1329                 ha->outstanding_cmds[pkt->handle] = NULL;
1330
1331                 /* Bad payload or header */
1332                 if (pkt->entry_status &
1333                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1334                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1335                         sp->cmd->result = DID_ERROR << 16;
1336                 } else if (pkt->entry_status & RF_BUSY) {
1337                         sp->cmd->result = DID_BUS_BUSY << 16;
1338                 } else {
1339                         sp->cmd->result = DID_ERROR << 16;
1340                 }
1341                 qla2x00_sp_compl(ha, sp);
1342
1343         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1344             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1345                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1346                     ha->host_no));
1347                 qla_printk(KERN_WARNING, ha,
1348                     "Error entry - invalid handle\n");
1349
1350                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1351                 qla2xxx_wake_dpc(ha);
1352         }
1353 }
1354
1355 /**
1356  * qla2x00_ms_entry() - Process a Management Server entry.
1357  * @ha: SCSI driver HA context
1358  * @index: Response queue out pointer
1359  */
1360 static void
1361 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1362 {
1363         srb_t          *sp;
1364
1365         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1366             __func__, ha->host_no, pkt, pkt->handle1));
1367
1368         /* Validate handle. */
1369         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1370                 sp = ha->outstanding_cmds[pkt->handle1];
1371         else
1372                 sp = NULL;
1373
1374         if (sp == NULL) {
1375                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1376                     ha->host_no));
1377                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1378
1379                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1380                 return;
1381         }
1382
1383         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1384         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1385
1386         /* Free outstanding command slot. */
1387         ha->outstanding_cmds[pkt->handle1] = NULL;
1388
1389         qla2x00_sp_compl(ha, sp);
1390 }
1391
1392
1393 /**
1394  * qla24xx_mbx_completion() - Process mailbox command completions.
1395  * @ha: SCSI driver HA context
1396  * @mb0: Mailbox0 register
1397  */
1398 static void
1399 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1400 {
1401         uint16_t        cnt;
1402         uint16_t __iomem *wptr;
1403         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1404
1405         /* Load return mailbox registers. */
1406         ha->flags.mbox_int = 1;
1407         ha->mailbox_out[0] = mb0;
1408         wptr = (uint16_t __iomem *)&reg->mailbox1;
1409
1410         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1411                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1412                 wptr++;
1413         }
1414
1415         if (ha->mcp) {
1416                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1417                     __func__, ha->host_no, ha->mcp->mb[0]));
1418         } else {
1419                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1420                     __func__, ha->host_no));
1421         }
1422 }
1423
1424 /**
1425  * qla24xx_process_response_queue() - Process response queue entries.
1426  * @ha: SCSI driver HA context
1427  */
1428 void
1429 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1430 {
1431         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1432         struct sts_entry_24xx *pkt;
1433
1434         if (!ha->flags.online)
1435                 return;
1436
1437         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1438                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1439
1440                 ha->rsp_ring_index++;
1441                 if (ha->rsp_ring_index == ha->response_q_length) {
1442                         ha->rsp_ring_index = 0;
1443                         ha->response_ring_ptr = ha->response_ring;
1444                 } else {
1445                         ha->response_ring_ptr++;
1446                 }
1447
1448                 if (pkt->entry_status != 0) {
1449                         DEBUG3(printk(KERN_INFO
1450                             "scsi(%ld): Process error entry.\n", ha->host_no));
1451
1452                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1453                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1454                         wmb();
1455                         continue;
1456                 }
1457
1458                 switch (pkt->entry_type) {
1459                 case STATUS_TYPE:
1460                         qla2x00_status_entry(ha, pkt);
1461                         break;
1462                 case STATUS_CONT_TYPE:
1463                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1464                         break;
1465                 case MS_IOCB_TYPE:
1466                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1467                         break;
1468                 case VP_RPT_ID_IOCB_TYPE:
1469                         qla24xx_report_id_acquisition(ha,
1470                             (struct vp_rpt_id_entry_24xx *)pkt);
1471                         break;
1472                 default:
1473                         /* Type Not Supported. */
1474                         DEBUG4(printk(KERN_WARNING
1475                             "scsi(%ld): Received unknown response pkt type %x "
1476                             "entry status=%x.\n",
1477                             ha->host_no, pkt->entry_type, pkt->entry_status));
1478                         break;
1479                 }
1480                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1481                 wmb();
1482         }
1483
1484         /* Adjust ring index */
1485         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1486 }
1487
1488 static void
1489 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1490 {
1491         int rval;
1492         uint32_t cnt;
1493         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1494
1495         if (!IS_QLA25XX(ha))
1496                 return;
1497
1498         rval = QLA_SUCCESS;
1499         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1500         RD_REG_DWORD(&reg->iobase_addr);
1501         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1502         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1503             rval == QLA_SUCCESS; cnt--) {
1504                 if (cnt) {
1505                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1506                         udelay(10);
1507                 } else
1508                         rval = QLA_FUNCTION_TIMEOUT;
1509         }
1510         if (rval == QLA_SUCCESS)
1511                 goto next_test;
1512
1513         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1514         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1515             rval == QLA_SUCCESS; cnt--) {
1516                 if (cnt) {
1517                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1518                         udelay(10);
1519                 } else
1520                         rval = QLA_FUNCTION_TIMEOUT;
1521         }
1522         if (rval != QLA_SUCCESS)
1523                 goto done;
1524
1525 next_test:
1526         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1527                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1528
1529 done:
1530         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1531         RD_REG_DWORD(&reg->iobase_window);
1532 }
1533
1534 /**
1535  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1536  * @irq:
1537  * @dev_id: SCSI driver HA context
1538  *
1539  * Called by system whenever the host adapter generates an interrupt.
1540  *
1541  * Returns handled flag.
1542  */
1543 irqreturn_t
1544 qla24xx_intr_handler(int irq, void *dev_id)
1545 {
1546         scsi_qla_host_t *ha;
1547         struct device_reg_24xx __iomem *reg;
1548         int             status;
1549         unsigned long   flags;
1550         unsigned long   iter;
1551         uint32_t        stat;
1552         uint32_t        hccr;
1553         uint16_t        mb[4];
1554
1555         ha = (scsi_qla_host_t *) dev_id;
1556         if (!ha) {
1557                 printk(KERN_INFO
1558                     "%s(): NULL host pointer\n", __func__);
1559                 return IRQ_NONE;
1560         }
1561
1562         reg = &ha->iobase->isp24;
1563         status = 0;
1564
1565         spin_lock_irqsave(&ha->hardware_lock, flags);
1566         for (iter = 50; iter--; ) {
1567                 stat = RD_REG_DWORD(&reg->host_status);
1568                 if (stat & HSRX_RISC_PAUSED) {
1569                         if (pci_channel_offline(ha->pdev))
1570                                 break;
1571
1572                         hccr = RD_REG_DWORD(&reg->hccr);
1573
1574                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1575                             "Dumping firmware!\n", hccr);
1576
1577                         qla2xxx_check_risc_status(ha);
1578
1579                         ha->isp_ops->fw_dump(ha, 1);
1580                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1581                         break;
1582                 } else if ((stat & HSRX_RISC_INT) == 0)
1583                         break;
1584
1585                 switch (stat & 0xff) {
1586                 case 0x1:
1587                 case 0x2:
1588                 case 0x10:
1589                 case 0x11:
1590                         qla24xx_mbx_completion(ha, MSW(stat));
1591                         status |= MBX_INTERRUPT;
1592
1593                         break;
1594                 case 0x12:
1595                         mb[0] = MSW(stat);
1596                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1597                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1598                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1599                         qla2x00_async_event(ha, mb);
1600                         break;
1601                 case 0x13:
1602                         qla24xx_process_response_queue(ha);
1603                         break;
1604                 default:
1605                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1606                             "(%d).\n",
1607                             ha->host_no, stat & 0xff));
1608                         break;
1609                 }
1610                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1611                 RD_REG_DWORD_RELAXED(&reg->hccr);
1612         }
1613         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1614
1615         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1616             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1617                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1618                 up(&ha->mbx_intr_sem);
1619         }
1620
1621         return IRQ_HANDLED;
1622 }
1623
1624 /**
1625  * qla24xx_ms_entry() - Process a Management Server entry.
1626  * @ha: SCSI driver HA context
1627  * @index: Response queue out pointer
1628  */
1629 static void
1630 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1631 {
1632         srb_t          *sp;
1633
1634         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1635             __func__, ha->host_no, pkt, pkt->handle));
1636
1637         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1638         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1639
1640         /* Validate handle. */
1641         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1642                 sp = ha->outstanding_cmds[pkt->handle];
1643         else
1644                 sp = NULL;
1645
1646         if (sp == NULL) {
1647                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1648                     ha->host_no));
1649                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1650                     ha->host_no));
1651                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1652                     pkt->handle);
1653
1654                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1655                 return;
1656         }
1657
1658         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1659         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1660
1661         /* Free outstanding command slot. */
1662         ha->outstanding_cmds[pkt->handle] = NULL;
1663
1664         qla2x00_sp_compl(ha, sp);
1665 }
1666
1667 static irqreturn_t
1668 qla24xx_msix_rsp_q(int irq, void *dev_id)
1669 {
1670         scsi_qla_host_t *ha;
1671         struct device_reg_24xx __iomem *reg;
1672         unsigned long flags;
1673
1674         ha = dev_id;
1675         reg = &ha->iobase->isp24;
1676
1677         spin_lock_irqsave(&ha->hardware_lock, flags);
1678
1679         qla24xx_process_response_queue(ha);
1680
1681         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1682
1683         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1684
1685         return IRQ_HANDLED;
1686 }
1687
1688 static irqreturn_t
1689 qla24xx_msix_default(int irq, void *dev_id)
1690 {
1691         scsi_qla_host_t *ha;
1692         struct device_reg_24xx __iomem *reg;
1693         int             status;
1694         unsigned long   flags;
1695         uint32_t        stat;
1696         uint32_t        hccr;
1697         uint16_t        mb[4];
1698
1699         ha = dev_id;
1700         reg = &ha->iobase->isp24;
1701         status = 0;
1702
1703         spin_lock_irqsave(&ha->hardware_lock, flags);
1704         do {
1705                 stat = RD_REG_DWORD(&reg->host_status);
1706                 if (stat & HSRX_RISC_PAUSED) {
1707                         if (pci_channel_offline(ha->pdev))
1708                                 break;
1709
1710                         hccr = RD_REG_DWORD(&reg->hccr);
1711
1712                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1713                             "Dumping firmware!\n", hccr);
1714
1715                         qla2xxx_check_risc_status(ha);
1716
1717                         ha->isp_ops->fw_dump(ha, 1);
1718                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1719                         break;
1720                 } else if ((stat & HSRX_RISC_INT) == 0)
1721                         break;
1722
1723                 switch (stat & 0xff) {
1724                 case 0x1:
1725                 case 0x2:
1726                 case 0x10:
1727                 case 0x11:
1728                         qla24xx_mbx_completion(ha, MSW(stat));
1729                         status |= MBX_INTERRUPT;
1730
1731                         break;
1732                 case 0x12:
1733                         mb[0] = MSW(stat);
1734                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1735                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1736                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1737                         qla2x00_async_event(ha, mb);
1738                         break;
1739                 case 0x13:
1740                         qla24xx_process_response_queue(ha);
1741                         break;
1742                 default:
1743                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1744                             "(%d).\n",
1745                             ha->host_no, stat & 0xff));
1746                         break;
1747                 }
1748                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1749         } while (0);
1750         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1751
1752         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1753             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1754                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1755                 up(&ha->mbx_intr_sem);
1756         }
1757
1758         return IRQ_HANDLED;
1759 }
1760
1761 /* Interrupt handling helpers. */
1762
1763 struct qla_init_msix_entry {
1764         uint16_t entry;
1765         uint16_t index;
1766         const char *name;
1767         irq_handler_t handler;
1768 };
1769
1770 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1771         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1772                 "qla2xxx (default)", qla24xx_msix_default },
1773
1774         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1775                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1776 };
1777
1778 static void
1779 qla24xx_disable_msix(scsi_qla_host_t *ha)
1780 {
1781         int i;
1782         struct qla_msix_entry *qentry;
1783
1784         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1785                 qentry = &ha->msix_entries[imsix_entries[i].index];
1786                 if (qentry->have_irq)
1787                         free_irq(qentry->msix_vector, ha);
1788         }
1789         pci_disable_msix(ha->pdev);
1790 }
1791
1792 static int
1793 qla24xx_enable_msix(scsi_qla_host_t *ha)
1794 {
1795         int i, ret;
1796         struct msix_entry entries[QLA_MSIX_ENTRIES];
1797         struct qla_msix_entry *qentry;
1798
1799         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1800                 entries[i].entry = imsix_entries[i].entry;
1801
1802         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1803         if (ret) {
1804                 qla_printk(KERN_WARNING, ha,
1805                     "MSI-X: Failed to enable support -- %d/%d\n",
1806                     QLA_MSIX_ENTRIES, ret);
1807                 goto msix_out;
1808         }
1809         ha->flags.msix_enabled = 1;
1810
1811         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1812                 qentry = &ha->msix_entries[imsix_entries[i].index];
1813                 qentry->msix_vector = entries[i].vector;
1814                 qentry->msix_entry = entries[i].entry;
1815                 qentry->have_irq = 0;
1816                 ret = request_irq(qentry->msix_vector,
1817                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1818                 if (ret) {
1819                         qla_printk(KERN_WARNING, ha,
1820                             "MSI-X: Unable to register handler -- %x/%d.\n",
1821                             imsix_entries[i].index, ret);
1822                         qla24xx_disable_msix(ha);
1823                         goto msix_out;
1824                 }
1825                 qentry->have_irq = 1;
1826         }
1827
1828 msix_out:
1829         return ret;
1830 }
1831
1832 int
1833 qla2x00_request_irqs(scsi_qla_host_t *ha)
1834 {
1835         int ret;
1836
1837         /* If possible, enable MSI-X. */
1838         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1839                 goto skip_msix;
1840
1841         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1842             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1843                 DEBUG2(qla_printk(KERN_WARNING, ha,
1844                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1845                     ha->chip_revision, ha->fw_attributes));
1846
1847                 goto skip_msix;
1848         }
1849
1850         ret = qla24xx_enable_msix(ha);
1851         if (!ret) {
1852                 DEBUG2(qla_printk(KERN_INFO, ha,
1853                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1854                     ha->fw_attributes));
1855                 return ret;
1856         }
1857         qla_printk(KERN_WARNING, ha,
1858             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1859 skip_msix:
1860
1861         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1862                 goto skip_msi;
1863
1864         ret = pci_enable_msi(ha->pdev);
1865         if (!ret) {
1866                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1867                 ha->flags.msi_enabled = 1;
1868         }
1869 skip_msi:
1870
1871         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1872             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1873         if (!ret) {
1874                 ha->flags.inta_enabled = 1;
1875                 ha->host->irq = ha->pdev->irq;
1876         } else {
1877                 qla_printk(KERN_WARNING, ha,
1878                     "Failed to reserve interrupt %d already in use.\n",
1879                     ha->pdev->irq);
1880         }
1881
1882         return ret;
1883 }
1884
1885 void
1886 qla2x00_free_irqs(scsi_qla_host_t *ha)
1887 {
1888
1889         if (ha->flags.msix_enabled)
1890                 qla24xx_disable_msix(ha);
1891         else if (ha->flags.inta_enabled) {
1892                 free_irq(ha->host->irq, ha);
1893                 pci_disable_msi(ha->pdev);
1894         }
1895 }