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                 complete(&ha->mbx_intr_comp);
 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                 complete(&ha->mbx_intr_comp);
 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                 qla_printk(KERN_INFO, ha,
 351                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 352                     mb[1], mb[2], mb[3]);
 353
 354                 ha->isp_ops->fw_dump(ha, 1);
 355
 356                 if (IS_FWI2_CAPABLE(ha)) {
 357                         if (mb[1] == 0 && mb[2] == 0) {
 358                                 qla_printk(KERN_ERR, ha,
 359                                     "Unrecoverable Hardware Error: adapter "
 360                                     "marked OFFLINE!\n");
 361                                 ha->flags.online = 0;
 362                         } else
 363                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 364                 } else if (mb[1] == 0) {
 365                         qla_printk(KERN_INFO, ha,
 366                             "Unrecoverable Hardware Error: adapter marked "
 367                             "OFFLINE!\n");
 368                         ha->flags.online = 0;
 369                 } else
 370                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 371                 break;
 372
 373         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 374                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 375                     ha->host_no));
 376                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 377
 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                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 387                 break;
 388
 389         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 390                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 391                     ha->host_no));
 392                 break;
 393
 394         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 395                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 396                     mb[1]));
 397                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 398
 399                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 400                         atomic_set(&ha->loop_state, LOOP_DOWN);
 401                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 402                         qla2x00_mark_all_devices_lost(ha, 1);
 403                 }
 404
 405                 if (ha->parent) {
 406                         atomic_set(&ha->vp_state, VP_FAILED);
 407                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 408                 }
 409
 410                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 411
 412                 ha->flags.management_server_logged_in = 0;
 413                 break;
 414
 415         case MBA_LOOP_UP:               /* Loop Up Event */
 416                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 417                         link_speed = link_speeds[0];
 418                         ha->link_data_rate = PORT_SPEED_1GB;
 419                 } else {
 420                         link_speed = link_speeds[LS_UNKNOWN];
 421                         if (mb[1] < 5)
 422                                 link_speed = link_speeds[mb[1]];
 423                         ha->link_data_rate = mb[1];
 424                 }
 425
 426                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 427                     ha->host_no, link_speed));
 428                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 429                     link_speed);
 430
 431                 ha->flags.management_server_logged_in = 0;
 432                 break;
 433
 434         case MBA_LOOP_DOWN:             /* Loop Down Event */
 435                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 436                     ha->host_no, mb[1]));
 437                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 438
 439                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 440                         atomic_set(&ha->loop_state, LOOP_DOWN);
 441                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 442                         ha->device_flags |= DFLG_NO_CABLE;
 443                         qla2x00_mark_all_devices_lost(ha, 1);
 444                 }
 445
 446                 if (ha->parent) {
 447                         atomic_set(&ha->vp_state, VP_FAILED);
 448                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 449                 }
 450
 451                 ha->flags.management_server_logged_in = 0;
 452                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 453                 if (ql2xfdmienable)
 454                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 455                 break;
 456
 457         case MBA_LIP_RESET:             /* LIP reset occurred */
 458                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 459                     ha->host_no, mb[1]));
 460                 qla_printk(KERN_INFO, ha,
 461                     "LIP reset occured (%x).\n", mb[1]);
 462
 463                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 464                         atomic_set(&ha->loop_state, LOOP_DOWN);
 465                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 466                         qla2x00_mark_all_devices_lost(ha, 1);
 467                 }
 468
 469                 if (ha->parent) {
 470                         atomic_set(&ha->vp_state, VP_FAILED);
 471                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 472                 }
 473
 474                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 475
 476                 ha->operating_mode = LOOP;
 477                 ha->flags.management_server_logged_in = 0;
 478                 break;
 479
 480         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 481                 if (IS_QLA2100(ha))
 482                         break;
 483
 484                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 485                     ha->host_no));
 486
 487                 /*
 488                  * Until there's a transition from loop down to loop up, treat
 489                  * this as loop down only.
 490                  */
 491                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 492                         atomic_set(&ha->loop_state, LOOP_DOWN);
 493                         if (!atomic_read(&ha->loop_down_timer))
 494                                 atomic_set(&ha->loop_down_timer,
 495                                     LOOP_DOWN_TIME);
 496                         qla2x00_mark_all_devices_lost(ha, 1);
 497                 }
 498
 499                 if (ha->parent) {
 500                         atomic_set(&ha->vp_state, VP_FAILED);
 501                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 502                 }
 503
 504                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 505                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 506                 }
 507                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 508
 509                 ha->flags.gpsc_supported = 1;
 510                 ha->flags.management_server_logged_in = 0;
 511                 break;
 512
 513         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 514                 if (IS_QLA2100(ha))
 515                         break;
 516
 517                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 518                     "received.\n",
 519                     ha->host_no));
 520                 qla_printk(KERN_INFO, ha,
 521                     "Configuration change detected: value=%x.\n", mb[1]);
 522
 523                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 524                         atomic_set(&ha->loop_state, LOOP_DOWN);
 525                         if (!atomic_read(&ha->loop_down_timer))
 526                                 atomic_set(&ha->loop_down_timer,
 527                                     LOOP_DOWN_TIME);
 528                         qla2x00_mark_all_devices_lost(ha, 1);
 529                 }
 530
 531                 if (ha->parent) {
 532                         atomic_set(&ha->vp_state, VP_FAILED);
 533                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 534                 }
 535
 536                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 537                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 538                 break;
 539
 540         case MBA_PORT_UPDATE:           /* Port database update */
 541                 /*
 542                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 543                  * event etc. earlier indicating loop is down) then process
 544                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 545                  */
 546                 atomic_set(&ha->loop_down_timer, 0);
 547                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 548                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 549                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 550                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 551                             mb[2], mb[3]));
 552                         break;
 553                 }
 554
 555                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 556                     ha->host_no));
 557                 DEBUG(printk(KERN_INFO
 558                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 559                     ha->host_no, mb[1], mb[2], mb[3]));
 560
 561                 /*
 562                  * Mark all devices as missing so we will login again.
 563                  */
 564                 atomic_set(&ha->loop_state, LOOP_UP);
 565
 566                 qla2x00_mark_all_devices_lost(ha, 1);
 567
 568                 ha->flags.rscn_queue_overflow = 1;
 569
 570                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 571                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 572                 break;
 573
 574         case MBA_RSCN_UPDATE:           /* State Change Registration */
 575                 /* Check if the Vport has issued a SCR */
 576                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 577                         break;
 578                 /* Only handle SCNs for our Vport index. */
 579                 if (ha->flags.npiv_supported && ha->vp_idx != mb[3])
 580                         break;
 581
 582                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 583                     ha->host_no));
 584                 DEBUG(printk(KERN_INFO
 585                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 586                     ha->host_no, mb[1], mb[2], mb[3]));
 587
 588                 rscn_entry = (mb[1] << 16) | mb[2];
 589                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 590                     ha->d_id.b.al_pa;
 591                 if (rscn_entry == host_pid) {
 592                         DEBUG(printk(KERN_INFO
 593                             "scsi(%ld): Ignoring RSCN update to local host "
 594                             "port ID (%06x)\n",
 595                             ha->host_no, host_pid));
 596                         break;
 597                 }
 598
 599                 rscn_queue_index = ha->rscn_in_ptr + 1;
 600                 if (rscn_queue_index == MAX_RSCN_COUNT)
 601                         rscn_queue_index = 0;
 602                 if (rscn_queue_index != ha->rscn_out_ptr) {
 603                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 604                         ha->rscn_in_ptr = rscn_queue_index;
 605                 } else {
 606                         ha->flags.rscn_queue_overflow = 1;
 607                 }
 608
 609                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 610                 atomic_set(&ha->loop_down_timer, 0);
 611                 ha->flags.management_server_logged_in = 0;
 612
 613                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 614                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 615                 break;
 616
 617         /* case MBA_RIO_RESPONSE: */
 618         case MBA_ZIO_RESPONSE:
 619                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 620                     ha->host_no));
 621                 DEBUG(printk(KERN_INFO
 622                     "scsi(%ld): [R|Z]IO update completion.\n",
 623                     ha->host_no));
 624
 625                 if (IS_FWI2_CAPABLE(ha))
 626                         qla24xx_process_response_queue(ha);
 627                 else
 628                         qla2x00_process_response_queue(ha);
 629                 break;
 630
 631         case MBA_DISCARD_RND_FRAME:
 632                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 633                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 634                 break;
 635
 636         case MBA_TRACE_NOTIFICATION:
 637                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 638                 ha->host_no, mb[1], mb[2]));
 639                 break;
 640         }
 641
 642         if (!ha->parent && ha->num_vhosts)
 643                 qla2x00_alert_all_vps(ha, mb);
 644 }
 645
 646 static void
 647 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 648 {
 649         fc_port_t *fcport = data;
 650
 651         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 652                 return;
 653
 654         if (sdev->ordered_tags)
 655                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 656                     sdev->queue_depth + 1);
 657         else
 658                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 659                     sdev->queue_depth + 1);
 660
 661         fcport->last_ramp_up = jiffies;
 662
 663         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 664             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 665             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 666             sdev->queue_depth));
 667 }
 668
 669 static void
 670 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 671 {
 672         fc_port_t *fcport = data;
 673
 674         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 675                 return;
 676
 677         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 678             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 679             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 680             sdev->queue_depth));
 681 }
 682
 683 static inline void
 684 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 685 {
 686         fc_port_t *fcport;
 687         struct scsi_device *sdev;
 688
 689         sdev = sp->cmd->device;
 690         if (sdev->queue_depth >= ha->max_q_depth)
 691                 return;
 692
 693         fcport = sp->fcport;
 694         if (time_before(jiffies,
 695             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 696                 return;
 697         if (time_before(jiffies,
 698             fcport->last_queue_full + ql2xqfullrampup * HZ))
 699                 return;
 700
 701         starget_for_each_device(sdev->sdev_target, fcport,
 702             qla2x00_adjust_sdev_qdepth_up);
 703 }
 704
 705 /**
 706  * qla2x00_process_completed_request() - Process a Fast Post response.
 707  * @ha: SCSI driver HA context
 708  * @index: SRB index
 709  */
 710 static void
 711 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 712 {
 713         srb_t *sp;
 714
 715         /* Validate handle. */
 716         if (index >= MAX_OUTSTANDING_COMMANDS) {
 717                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 718                     ha->host_no, index));
 719                 qla_printk(KERN_WARNING, ha,
 720                     "Invalid SCSI completion handle %d.\n", index);
 721
 722                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 723                 return;
 724         }
 725
 726         sp = ha->outstanding_cmds[index];
 727         if (sp) {
 728                 /* Free outstanding command slot. */
 729                 ha->outstanding_cmds[index] = NULL;
 730
 731                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 732                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 733
 734                 /* Save ISP completion status */
 735                 sp->cmd->result = DID_OK << 16;
 736
 737                 qla2x00_ramp_up_queue_depth(ha, sp);
 738                 qla2x00_sp_compl(ha, sp);
 739         } else {
 740                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 741                     ha->host_no));
 742                 qla_printk(KERN_WARNING, ha,
 743                     "Invalid ISP SCSI completion handle\n");
 744
 745                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 746         }
 747 }
 748
 749 /**
 750  * qla2x00_process_response_queue() - Process response queue entries.
 751  * @ha: SCSI driver HA context
 752  */
 753 void
 754 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 755 {
 756         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 757         sts_entry_t     *pkt;
 758         uint16_t        handle_cnt;
 759         uint16_t        cnt;
 760
 761         if (!ha->flags.online)
 762                 return;
 763
 764         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 765                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 766
 767                 ha->rsp_ring_index++;
 768                 if (ha->rsp_ring_index == ha->response_q_length) {
 769                         ha->rsp_ring_index = 0;
 770                         ha->response_ring_ptr = ha->response_ring;
 771                 } else {
 772                         ha->response_ring_ptr++;
 773                 }
 774
 775                 if (pkt->entry_status != 0) {
 776                         DEBUG3(printk(KERN_INFO
 777                             "scsi(%ld): Process error entry.\n", ha->host_no));
 778
 779                         qla2x00_error_entry(ha, pkt);
 780                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 781                         wmb();
 782                         continue;
 783                 }
 784
 785                 switch (pkt->entry_type) {
 786                 case STATUS_TYPE:
 787                         qla2x00_status_entry(ha, pkt);
 788                         break;
 789                 case STATUS_TYPE_21:
 790                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 791                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 792                                 qla2x00_process_completed_request(ha,
 793                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 794                         }
 795                         break;
 796                 case STATUS_TYPE_22:
 797                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 798                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 799                                 qla2x00_process_completed_request(ha,
 800                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 801                         }
 802                         break;
 803                 case STATUS_CONT_TYPE:
 804                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 805                         break;
 806                 case MS_IOCB_TYPE:
 807                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 808                         break;
 809                 default:
 810                         /* Type Not Supported. */
 811                         DEBUG4(printk(KERN_WARNING
 812                             "scsi(%ld): Received unknown response pkt type %x "
 813                             "entry status=%x.\n",
 814                             ha->host_no, pkt->entry_type, pkt->entry_status));
 815                         break;
 816                 }
 817                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 818                 wmb();
 819         }
 820
 821         /* Adjust ring index */
 822         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 823 }
 824
 825 static inline void
 826 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 827 {
 828         struct scsi_cmnd *cp = sp->cmd;
 829
 830         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 831                 sense_len = SCSI_SENSE_BUFFERSIZE;
 832
 833         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 834         sp->request_sense_length = sense_len;
 835         sp->request_sense_ptr = cp->sense_buffer;
 836         if (sp->request_sense_length > 32)
 837                 sense_len = 32;
 838
 839         memcpy(cp->sense_buffer, sense_data, sense_len);
 840
 841         sp->request_sense_ptr += sense_len;
 842         sp->request_sense_length -= sense_len;
 843         if (sp->request_sense_length != 0)
 844                 sp->ha->status_srb = sp;
 845
 846         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 847             "cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
 848             cp->device->id, cp->device->lun, cp, cp->serial_number));
 849         if (sense_len)
 850                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 851                     CMD_ACTUAL_SNSLEN(cp)));
 852 }
 853
 854 /**
 855  * qla2x00_status_entry() - Process a Status IOCB entry.
 856  * @ha: SCSI driver HA context
 857  * @pkt: Entry pointer
 858  */
 859 static void
 860 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 861 {
 862         srb_t           *sp;
 863         fc_port_t       *fcport;
 864         struct scsi_cmnd *cp;
 865         sts_entry_t *sts;
 866         struct sts_entry_24xx *sts24;
 867         uint16_t        comp_status;
 868         uint16_t        scsi_status;
 869         uint8_t         lscsi_status;
 870         int32_t         resid;
 871         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 872         uint8_t         *rsp_info, *sense_data;
 873
 874         sts = (sts_entry_t *) pkt;
 875         sts24 = (struct sts_entry_24xx *) pkt;
 876         if (IS_FWI2_CAPABLE(ha)) {
 877                 comp_status = le16_to_cpu(sts24->comp_status);
 878                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 879         } else {
 880                 comp_status = le16_to_cpu(sts->comp_status);
 881                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 882         }
 883
 884         /* Fast path completion. */
 885         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 886                 qla2x00_process_completed_request(ha, sts->handle);
 887
 888                 return;
 889         }
 890
 891         /* Validate handle. */
 892         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 893                 sp = ha->outstanding_cmds[sts->handle];
 894                 ha->outstanding_cmds[sts->handle] = NULL;
 895         } else
 896                 sp = NULL;
 897
 898         if (sp == NULL) {
 899                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 900                     ha->host_no));
 901                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 902
 903                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 904                 qla2xxx_wake_dpc(ha);
 905                 return;
 906         }
 907         cp = sp->cmd;
 908         if (cp == NULL) {
 909                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 910                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 911                 qla_printk(KERN_WARNING, ha,
 912                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 913
 914                 return;
 915         }
 916
 917         lscsi_status = scsi_status & STATUS_MASK;
 918         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 919         CMD_COMPL_STATUS(cp) = comp_status;
 920         CMD_SCSI_STATUS(cp) = scsi_status;
 921
 922         fcport = sp->fcport;
 923
 924         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 925         if (IS_FWI2_CAPABLE(ha)) {
 926                 sense_len = le32_to_cpu(sts24->sense_len);
 927                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 928                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 929                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 930                 rsp_info = sts24->data;
 931                 sense_data = sts24->data;
 932                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 933         } else {
 934                 sense_len = le16_to_cpu(sts->req_sense_length);
 935                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 936                 resid_len = le32_to_cpu(sts->residual_length);
 937                 rsp_info = sts->rsp_info;
 938                 sense_data = sts->req_sense_data;
 939         }
 940
 941         /* Check for any FCP transport errors. */
 942         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 943                 /* Sense data lies beyond any FCP RESPONSE data. */
 944                 if (IS_FWI2_CAPABLE(ha))
 945                         sense_data += rsp_info_len;
 946                 if (rsp_info_len > 3 && rsp_info[3]) {
 947                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 948                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 949                             "retrying command\n", ha->host_no,
 950                             cp->device->channel, cp->device->id,
 951                             cp->device->lun, rsp_info_len, rsp_info[0],
 952                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 953                             rsp_info[5], rsp_info[6], rsp_info[7]));
 954
 955                         cp->result = DID_BUS_BUSY << 16;
 956                         qla2x00_sp_compl(ha, sp);
 957                         return;
 958                 }
 959         }
 960
 961         /*
 962          * Based on Host and scsi status generate status code for Linux
 963          */
 964         switch (comp_status) {
 965         case CS_COMPLETE:
 966         case CS_QUEUE_FULL:
 967                 if (scsi_status == 0) {
 968                         cp->result = DID_OK << 16;
 969                         break;
 970                 }
 971                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 972                         resid = resid_len;
 973                         scsi_set_resid(cp, resid);
 974                         CMD_RESID_LEN(cp) = resid;
 975
 976                         if (!lscsi_status &&
 977                             ((unsigned)(scsi_bufflen(cp) - resid) <
 978                              cp->underflow)) {
 979                                 qla_printk(KERN_INFO, ha,
 980                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 981                                            "detected (%x of %x bytes)...returning "
 982                                            "error status.\n", ha->host_no,
 983                                            cp->device->channel, cp->device->id,
 984                                            cp->device->lun, resid,
 985                                            scsi_bufflen(cp));
 986
 987                                 cp->result = DID_ERROR << 16;
 988                                 break;
 989                         }
 990                 }
 991                 cp->result = DID_OK << 16 | lscsi_status;
 992
 993                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 994                         DEBUG2(printk(KERN_INFO
 995                             "scsi(%ld): QUEUE FULL status detected "
 996                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 997                             scsi_status));
 998
 999                         /* Adjust queue depth for all luns on the port. */
1000                         fcport->last_queue_full = jiffies;
1001                         starget_for_each_device(cp->device->sdev_target,
1002                             fcport, qla2x00_adjust_sdev_qdepth_down);
1003                         break;
1004                 }
1005                 if (lscsi_status != SS_CHECK_CONDITION)
1006                         break;
1007
1008                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1009                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1010                         break;
1011
1012                 qla2x00_handle_sense(sp, sense_data, sense_len);
1013                 break;
1014
1015         case CS_DATA_UNDERRUN:
1016                 resid = resid_len;
1017                 /* Use F/W calculated residual length. */
1018                 if (IS_FWI2_CAPABLE(ha)) {
1019                         if (scsi_status & SS_RESIDUAL_UNDER &&
1020                             resid != fw_resid_len) {
1021                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1022                                 lscsi_status = 0;
1023                         }
1024                         resid = fw_resid_len;
1025                 }
1026
1027                 if (scsi_status & SS_RESIDUAL_UNDER) {
1028                         scsi_set_resid(cp, resid);
1029                         CMD_RESID_LEN(cp) = resid;
1030                 } else {
1031                         DEBUG2(printk(KERN_INFO
1032                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1033                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1034                             "os_underflow=0x%x\n", ha->host_no,
1035                             cp->device->id, cp->device->lun, comp_status,
1036                             scsi_status, resid_len, resid, cp->cmnd[0],
1037                             cp->underflow));
1038
1039                 }
1040
1041                 /*
1042                  * Check to see if SCSI Status is non zero. If so report SCSI
1043                  * Status.
1044                  */
1045                 if (lscsi_status != 0) {
1046                         cp->result = DID_OK << 16 | lscsi_status;
1047
1048                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1049                                 DEBUG2(printk(KERN_INFO
1050                                     "scsi(%ld): QUEUE FULL status detected "
1051                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1052                                     scsi_status));
1053
1054                                 /*
1055                                  * Adjust queue depth for all luns on the
1056                                  * port.
1057                                  */
1058                                 fcport->last_queue_full = jiffies;
1059                                 starget_for_each_device(
1060                                     cp->device->sdev_target, fcport,
1061                                     qla2x00_adjust_sdev_qdepth_down);
1062                                 break;
1063                         }
1064                         if (lscsi_status != SS_CHECK_CONDITION)
1065                                 break;
1066
1067                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1068                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1069                                 break;
1070
1071                         qla2x00_handle_sense(sp, sense_data, sense_len);
1072
1073                         /*
1074                          * In case of a Underrun condition, set both the lscsi
1075                          * status and the completion status to appropriate
1076                          * values.
1077                          */
1078                         if (resid &&
1079                             ((unsigned)(scsi_bufflen(cp) - resid) <
1080                              cp->underflow)) {
1081                                 DEBUG2(qla_printk(KERN_INFO, ha,
1082                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1083                                     "detected (%x of %x bytes)...returning "
1084                                     "error status.\n", ha->host_no,
1085                                     cp->device->channel, cp->device->id,
1086                                     cp->device->lun, resid,
1087                                     scsi_bufflen(cp)));
1088
1089                                 cp->result = DID_ERROR << 16 | lscsi_status;
1090                         }
1091                 } else {
1092                         /*
1093                          * If RISC reports underrun and target does not report
1094                          * it then we must have a lost frame, so tell upper
1095                          * layer to retry it by reporting a bus busy.
1096                          */
1097                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1098                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1099                                               "frame(s) detected (%x of %x bytes)..."
1100                                               "retrying command.\n", ha->host_no,
1101                                               cp->device->channel, cp->device->id,
1102                                               cp->device->lun, resid,
1103                                               scsi_bufflen(cp)));
1104
1105                                 cp->result = DID_BUS_BUSY << 16;
1106                                 break;
1107                         }
1108
1109                         /* Handle mid-layer underflow */
1110                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1111                             cp->underflow) {
1112                                 qla_printk(KERN_INFO, ha,
1113                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1114                                            "detected (%x of %x bytes)...returning "
1115                                            "error status.\n", ha->host_no,
1116                                            cp->device->channel, cp->device->id,
1117                                            cp->device->lun, resid,
1118                                            scsi_bufflen(cp));
1119
1120                                 cp->result = DID_ERROR << 16;
1121                                 break;
1122                         }
1123
1124                         /* Everybody online, looking good... */
1125                         cp->result = DID_OK << 16;
1126                 }
1127                 break;
1128
1129         case CS_DATA_OVERRUN:
1130                 DEBUG2(printk(KERN_INFO
1131                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1132                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1133                     scsi_status));
1134                 DEBUG2(printk(KERN_INFO
1135                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1136                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1137                     cp->cmnd[4], cp->cmnd[5]));
1138                 DEBUG2(printk(KERN_INFO
1139                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1140                     "status!\n",
1141                     cp->serial_number, scsi_bufflen(cp), resid_len));
1142
1143                 cp->result = DID_ERROR << 16;
1144                 break;
1145
1146         case CS_PORT_LOGGED_OUT:
1147         case CS_PORT_CONFIG_CHG:
1148         case CS_PORT_BUSY:
1149         case CS_INCOMPLETE:
1150         case CS_PORT_UNAVAILABLE:
1151                 /*
1152                  * If the port is in Target Down state, return all IOs for this
1153                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1154                  * retry_queue.
1155                  */
1156                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1157                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1158                     ha->host_no, cp->device->id, cp->device->lun,
1159                     cp->serial_number, comp_status,
1160                     atomic_read(&fcport->state)));
1161
1162                 cp->result = DID_BUS_BUSY << 16;
1163                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1164                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1165                 }
1166                 break;
1167
1168         case CS_RESET:
1169                 DEBUG2(printk(KERN_INFO
1170                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1171                     ha->host_no, comp_status, scsi_status));
1172
1173                 cp->result = DID_RESET << 16;
1174                 break;
1175
1176         case CS_ABORTED:
1177                 /*
1178                  * hv2.19.12 - DID_ABORT does not retry the request if we
1179                  * aborted this request then abort otherwise it must be a
1180                  * reset.
1181                  */
1182                 DEBUG2(printk(KERN_INFO
1183                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1184                     ha->host_no, comp_status, scsi_status));
1185
1186                 cp->result = DID_RESET << 16;
1187                 break;
1188
1189         case CS_TIMEOUT:
1190                 cp->result = DID_BUS_BUSY << 16;
1191
1192                 if (IS_FWI2_CAPABLE(ha)) {
1193                         DEBUG2(printk(KERN_INFO
1194                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1195                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1196                             cp->device->id, cp->device->lun, comp_status,
1197                             scsi_status));
1198                         break;
1199                 }
1200                 DEBUG2(printk(KERN_INFO
1201                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1202                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1203                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1204                     le16_to_cpu(sts->status_flags)));
1205
1206                 /* Check to see if logout occurred. */
1207                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1208                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1209                 break;
1210
1211         default:
1212                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1213                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1214                 qla_printk(KERN_INFO, ha,
1215                     "Unknown status detected 0x%x-0x%x.\n",
1216                     comp_status, scsi_status);
1217
1218                 cp->result = DID_ERROR << 16;
1219                 break;
1220         }
1221
1222         /* Place command on done queue. */
1223         if (ha->status_srb == NULL)
1224                 qla2x00_sp_compl(ha, sp);
1225 }
1226
1227 /**
1228  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1229  * @ha: SCSI driver HA context
1230  * @pkt: Entry pointer
1231  *
1232  * Extended sense data.
1233  */
1234 static void
1235 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1236 {
1237         uint8_t         sense_sz = 0;
1238         srb_t           *sp = ha->status_srb;
1239         struct scsi_cmnd *cp;
1240
1241         if (sp != NULL && sp->request_sense_length != 0) {
1242                 cp = sp->cmd;
1243                 if (cp == NULL) {
1244                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1245                             "sp=%p.\n", __func__, sp));
1246                         qla_printk(KERN_INFO, ha,
1247                             "cmd is NULL: already returned to OS (sp=%p)\n",
1248                             sp);
1249
1250                         ha->status_srb = NULL;
1251                         return;
1252                 }
1253
1254                 if (sp->request_sense_length > sizeof(pkt->data)) {
1255                         sense_sz = sizeof(pkt->data);
1256                 } else {
1257                         sense_sz = sp->request_sense_length;
1258                 }
1259
1260                 /* Move sense data. */
1261                 if (IS_FWI2_CAPABLE(ha))
1262                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1263                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1264                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1265
1266                 sp->request_sense_ptr += sense_sz;
1267                 sp->request_sense_length -= sense_sz;
1268
1269                 /* Place command on done queue. */
1270                 if (sp->request_sense_length == 0) {
1271                         ha->status_srb = NULL;
1272                         qla2x00_sp_compl(ha, sp);
1273                 }
1274         }
1275 }
1276
1277 /**
1278  * qla2x00_error_entry() - Process an error entry.
1279  * @ha: SCSI driver HA context
1280  * @pkt: Entry pointer
1281  */
1282 static void
1283 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1284 {
1285         srb_t *sp;
1286
1287 #if defined(QL_DEBUG_LEVEL_2)
1288         if (pkt->entry_status & RF_INV_E_ORDER)
1289                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1290         else if (pkt->entry_status & RF_INV_E_COUNT)
1291                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1292         else if (pkt->entry_status & RF_INV_E_PARAM)
1293                 qla_printk(KERN_ERR, ha,
1294                     "%s: Invalid Entry Parameter\n", __func__);
1295         else if (pkt->entry_status & RF_INV_E_TYPE)
1296                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1297         else if (pkt->entry_status & RF_BUSY)
1298                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1299         else
1300                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1301 #endif
1302
1303         /* Validate handle. */
1304         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1305                 sp = ha->outstanding_cmds[pkt->handle];
1306         else
1307                 sp = NULL;
1308
1309         if (sp) {
1310                 /* Free outstanding command slot. */
1311                 ha->outstanding_cmds[pkt->handle] = NULL;
1312
1313                 /* Bad payload or header */
1314                 if (pkt->entry_status &
1315                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1316                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1317                         sp->cmd->result = DID_ERROR << 16;
1318                 } else if (pkt->entry_status & RF_BUSY) {
1319                         sp->cmd->result = DID_BUS_BUSY << 16;
1320                 } else {
1321                         sp->cmd->result = DID_ERROR << 16;
1322                 }
1323                 qla2x00_sp_compl(ha, sp);
1324
1325         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1326             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1327                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1328                     ha->host_no));
1329                 qla_printk(KERN_WARNING, ha,
1330                     "Error entry - invalid handle\n");
1331
1332                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1333                 qla2xxx_wake_dpc(ha);
1334         }
1335 }
1336
1337 /**
1338  * qla2x00_ms_entry() - Process a Management Server entry.
1339  * @ha: SCSI driver HA context
1340  * @index: Response queue out pointer
1341  */
1342 static void
1343 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1344 {
1345         srb_t          *sp;
1346
1347         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1348             __func__, ha->host_no, pkt, pkt->handle1));
1349
1350         /* Validate handle. */
1351         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1352                 sp = ha->outstanding_cmds[pkt->handle1];
1353         else
1354                 sp = NULL;
1355
1356         if (sp == NULL) {
1357                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1358                     ha->host_no));
1359                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1360
1361                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1362                 return;
1363         }
1364
1365         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1366         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1367
1368         /* Free outstanding command slot. */
1369         ha->outstanding_cmds[pkt->handle1] = NULL;
1370
1371         qla2x00_sp_compl(ha, sp);
1372 }
1373
1374
1375 /**
1376  * qla24xx_mbx_completion() - Process mailbox command completions.
1377  * @ha: SCSI driver HA context
1378  * @mb0: Mailbox0 register
1379  */
1380 static void
1381 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1382 {
1383         uint16_t        cnt;
1384         uint16_t __iomem *wptr;
1385         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1386
1387         /* Load return mailbox registers. */
1388         ha->flags.mbox_int = 1;
1389         ha->mailbox_out[0] = mb0;
1390         wptr = (uint16_t __iomem *)&reg->mailbox1;
1391
1392         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1393                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1394                 wptr++;
1395         }
1396
1397         if (ha->mcp) {
1398                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1399                     __func__, ha->host_no, ha->mcp->mb[0]));
1400         } else {
1401                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1402                     __func__, ha->host_no));
1403         }
1404 }
1405
1406 /**
1407  * qla24xx_process_response_queue() - Process response queue entries.
1408  * @ha: SCSI driver HA context
1409  */
1410 void
1411 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1412 {
1413         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1414         struct sts_entry_24xx *pkt;
1415
1416         if (!ha->flags.online)
1417                 return;
1418
1419         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1420                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1421
1422                 ha->rsp_ring_index++;
1423                 if (ha->rsp_ring_index == ha->response_q_length) {
1424                         ha->rsp_ring_index = 0;
1425                         ha->response_ring_ptr = ha->response_ring;
1426                 } else {
1427                         ha->response_ring_ptr++;
1428                 }
1429
1430                 if (pkt->entry_status != 0) {
1431                         DEBUG3(printk(KERN_INFO
1432                             "scsi(%ld): Process error entry.\n", ha->host_no));
1433
1434                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1435                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1436                         wmb();
1437                         continue;
1438                 }
1439
1440                 switch (pkt->entry_type) {
1441                 case STATUS_TYPE:
1442                         qla2x00_status_entry(ha, pkt);
1443                         break;
1444                 case STATUS_CONT_TYPE:
1445                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1446                         break;
1447                 case MS_IOCB_TYPE:
1448                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1449                         break;
1450                 case VP_RPT_ID_IOCB_TYPE:
1451                         qla24xx_report_id_acquisition(ha,
1452                             (struct vp_rpt_id_entry_24xx *)pkt);
1453                         break;
1454                 default:
1455                         /* Type Not Supported. */
1456                         DEBUG4(printk(KERN_WARNING
1457                             "scsi(%ld): Received unknown response pkt type %x "
1458                             "entry status=%x.\n",
1459                             ha->host_no, pkt->entry_type, pkt->entry_status));
1460                         break;
1461                 }
1462                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1463                 wmb();
1464         }
1465
1466         /* Adjust ring index */
1467         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1468 }
1469
1470 static void
1471 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1472 {
1473         int rval;
1474         uint32_t cnt;
1475         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1476
1477         if (!IS_QLA25XX(ha))
1478                 return;
1479
1480         rval = QLA_SUCCESS;
1481         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1482         RD_REG_DWORD(&reg->iobase_addr);
1483         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1484         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1485             rval == QLA_SUCCESS; cnt--) {
1486                 if (cnt) {
1487                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1488                         udelay(10);
1489                 } else
1490                         rval = QLA_FUNCTION_TIMEOUT;
1491         }
1492         if (rval == QLA_SUCCESS)
1493                 goto next_test;
1494
1495         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1496         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1497             rval == QLA_SUCCESS; cnt--) {
1498                 if (cnt) {
1499                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1500                         udelay(10);
1501                 } else
1502                         rval = QLA_FUNCTION_TIMEOUT;
1503         }
1504         if (rval != QLA_SUCCESS)
1505                 goto done;
1506
1507 next_test:
1508         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1509                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1510
1511 done:
1512         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1513         RD_REG_DWORD(&reg->iobase_window);
1514 }
1515
1516 /**
1517  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1518  * @irq:
1519  * @dev_id: SCSI driver HA context
1520  *
1521  * Called by system whenever the host adapter generates an interrupt.
1522  *
1523  * Returns handled flag.
1524  */
1525 irqreturn_t
1526 qla24xx_intr_handler(int irq, void *dev_id)
1527 {
1528         scsi_qla_host_t *ha;
1529         struct device_reg_24xx __iomem *reg;
1530         int             status;
1531         unsigned long   flags;
1532         unsigned long   iter;
1533         uint32_t        stat;
1534         uint32_t        hccr;
1535         uint16_t        mb[4];
1536
1537         ha = (scsi_qla_host_t *) dev_id;
1538         if (!ha) {
1539                 printk(KERN_INFO
1540                     "%s(): NULL host pointer\n", __func__);
1541                 return IRQ_NONE;
1542         }
1543
1544         reg = &ha->iobase->isp24;
1545         status = 0;
1546
1547         spin_lock_irqsave(&ha->hardware_lock, flags);
1548         for (iter = 50; iter--; ) {
1549                 stat = RD_REG_DWORD(&reg->host_status);
1550                 if (stat & HSRX_RISC_PAUSED) {
1551                         if (pci_channel_offline(ha->pdev))
1552                                 break;
1553
1554                         hccr = RD_REG_DWORD(&reg->hccr);
1555
1556                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1557                             "Dumping firmware!\n", hccr);
1558
1559                         qla2xxx_check_risc_status(ha);
1560
1561                         ha->isp_ops->fw_dump(ha, 1);
1562                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1563                         break;
1564                 } else if ((stat & HSRX_RISC_INT) == 0)
1565                         break;
1566
1567                 switch (stat & 0xff) {
1568                 case 0x1:
1569                 case 0x2:
1570                 case 0x10:
1571                 case 0x11:
1572                         qla24xx_mbx_completion(ha, MSW(stat));
1573                         status |= MBX_INTERRUPT;
1574
1575                         break;
1576                 case 0x12:
1577                         mb[0] = MSW(stat);
1578                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1579                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1580                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1581                         qla2x00_async_event(ha, mb);
1582                         break;
1583                 case 0x13:
1584                         qla24xx_process_response_queue(ha);
1585                         break;
1586                 default:
1587                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1588                             "(%d).\n",
1589                             ha->host_no, stat & 0xff));
1590                         break;
1591                 }
1592                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1593                 RD_REG_DWORD_RELAXED(&reg->hccr);
1594         }
1595         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1596
1597         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1598             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1599                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1600                 complete(&ha->mbx_intr_comp);
1601         }
1602
1603         return IRQ_HANDLED;
1604 }
1605
1606 /**
1607  * qla24xx_ms_entry() - Process a Management Server entry.
1608  * @ha: SCSI driver HA context
1609  * @index: Response queue out pointer
1610  */
1611 static void
1612 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1613 {
1614         srb_t          *sp;
1615
1616         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1617             __func__, ha->host_no, pkt, pkt->handle));
1618
1619         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1620         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1621
1622         /* Validate handle. */
1623         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1624                 sp = ha->outstanding_cmds[pkt->handle];
1625         else
1626                 sp = NULL;
1627
1628         if (sp == NULL) {
1629                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1630                     ha->host_no));
1631                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1632                     ha->host_no));
1633                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1634                     pkt->handle);
1635
1636                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1637                 return;
1638         }
1639
1640         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1641         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1642
1643         /* Free outstanding command slot. */
1644         ha->outstanding_cmds[pkt->handle] = NULL;
1645
1646         qla2x00_sp_compl(ha, sp);
1647 }
1648
1649 static irqreturn_t
1650 qla24xx_msix_rsp_q(int irq, void *dev_id)
1651 {
1652         scsi_qla_host_t *ha;
1653         struct device_reg_24xx __iomem *reg;
1654         unsigned long flags;
1655
1656         ha = dev_id;
1657         reg = &ha->iobase->isp24;
1658
1659         spin_lock_irqsave(&ha->hardware_lock, flags);
1660
1661         qla24xx_process_response_queue(ha);
1662
1663         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1664
1665         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1666
1667         return IRQ_HANDLED;
1668 }
1669
1670 static irqreturn_t
1671 qla24xx_msix_default(int irq, void *dev_id)
1672 {
1673         scsi_qla_host_t *ha;
1674         struct device_reg_24xx __iomem *reg;
1675         int             status;
1676         unsigned long   flags;
1677         uint32_t        stat;
1678         uint32_t        hccr;
1679         uint16_t        mb[4];
1680
1681         ha = dev_id;
1682         reg = &ha->iobase->isp24;
1683         status = 0;
1684
1685         spin_lock_irqsave(&ha->hardware_lock, flags);
1686         do {
1687                 stat = RD_REG_DWORD(&reg->host_status);
1688                 if (stat & HSRX_RISC_PAUSED) {
1689                         if (pci_channel_offline(ha->pdev))
1690                                 break;
1691
1692                         hccr = RD_REG_DWORD(&reg->hccr);
1693
1694                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1695                             "Dumping firmware!\n", hccr);
1696
1697                         qla2xxx_check_risc_status(ha);
1698
1699                         ha->isp_ops->fw_dump(ha, 1);
1700                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1701                         break;
1702                 } else if ((stat & HSRX_RISC_INT) == 0)
1703                         break;
1704
1705                 switch (stat & 0xff) {
1706                 case 0x1:
1707                 case 0x2:
1708                 case 0x10:
1709                 case 0x11:
1710                         qla24xx_mbx_completion(ha, MSW(stat));
1711                         status |= MBX_INTERRUPT;
1712
1713                         break;
1714                 case 0x12:
1715                         mb[0] = MSW(stat);
1716                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1717                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1718                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1719                         qla2x00_async_event(ha, mb);
1720                         break;
1721                 case 0x13:
1722                         qla24xx_process_response_queue(ha);
1723                         break;
1724                 default:
1725                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1726                             "(%d).\n",
1727                             ha->host_no, stat & 0xff));
1728                         break;
1729                 }
1730                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1731         } while (0);
1732         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1733
1734         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1735             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1736                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1737                 complete(&ha->mbx_intr_comp);
1738         }
1739
1740         return IRQ_HANDLED;
1741 }
1742
1743 /* Interrupt handling helpers. */
1744
1745 struct qla_init_msix_entry {
1746         uint16_t entry;
1747         uint16_t index;
1748         const char *name;
1749         irq_handler_t handler;
1750 };
1751
1752 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1753         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1754                 "qla2xxx (default)", qla24xx_msix_default },
1755
1756         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1757                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1758 };
1759
1760 static void
1761 qla24xx_disable_msix(scsi_qla_host_t *ha)
1762 {
1763         int i;
1764         struct qla_msix_entry *qentry;
1765
1766         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1767                 qentry = &ha->msix_entries[imsix_entries[i].index];
1768                 if (qentry->have_irq)
1769                         free_irq(qentry->msix_vector, ha);
1770         }
1771         pci_disable_msix(ha->pdev);
1772 }
1773
1774 static int
1775 qla24xx_enable_msix(scsi_qla_host_t *ha)
1776 {
1777         int i, ret;
1778         struct msix_entry entries[QLA_MSIX_ENTRIES];
1779         struct qla_msix_entry *qentry;
1780
1781         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1782                 entries[i].entry = imsix_entries[i].entry;
1783
1784         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1785         if (ret) {
1786                 qla_printk(KERN_WARNING, ha,
1787                     "MSI-X: Failed to enable support -- %d/%d\n",
1788                     QLA_MSIX_ENTRIES, ret);
1789                 goto msix_out;
1790         }
1791         ha->flags.msix_enabled = 1;
1792
1793         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1794                 qentry = &ha->msix_entries[imsix_entries[i].index];
1795                 qentry->msix_vector = entries[i].vector;
1796                 qentry->msix_entry = entries[i].entry;
1797                 qentry->have_irq = 0;
1798                 ret = request_irq(qentry->msix_vector,
1799                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1800                 if (ret) {
1801                         qla_printk(KERN_WARNING, ha,
1802                             "MSI-X: Unable to register handler -- %x/%d.\n",
1803                             imsix_entries[i].index, ret);
1804                         qla24xx_disable_msix(ha);
1805                         goto msix_out;
1806                 }
1807                 qentry->have_irq = 1;
1808         }
1809
1810 msix_out:
1811         return ret;
1812 }
1813
1814 int
1815 qla2x00_request_irqs(scsi_qla_host_t *ha)
1816 {
1817         int ret;
1818         device_reg_t __iomem *reg = ha->iobase;
1819         unsigned long flags;
1820
1821         /* If possible, enable MSI-X. */
1822         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1823                 goto skip_msix;
1824
1825         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1826             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1827                 DEBUG2(qla_printk(KERN_WARNING, ha,
1828                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1829                     ha->chip_revision, ha->fw_attributes));
1830
1831                 goto skip_msix;
1832         }
1833
1834         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1835             (ha->pdev->subsystem_device == 0x7040 ||
1836                 ha->pdev->subsystem_device == 0x7041 ||
1837                 ha->pdev->subsystem_device == 0x1705)) {
1838                 DEBUG2(qla_printk(KERN_WARNING, ha,
1839                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1840                     ha->pdev->subsystem_vendor,
1841                     ha->pdev->subsystem_device));
1842
1843                 goto skip_msi;
1844         }
1845
1846         ret = qla24xx_enable_msix(ha);
1847         if (!ret) {
1848                 DEBUG2(qla_printk(KERN_INFO, ha,
1849                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1850                     ha->fw_attributes));
1851                 goto clear_risc_ints;
1852         }
1853         qla_printk(KERN_WARNING, ha,
1854             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1855 skip_msix:
1856
1857         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1858                 goto skip_msi;
1859
1860         ret = pci_enable_msi(ha->pdev);
1861         if (!ret) {
1862                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1863                 ha->flags.msi_enabled = 1;
1864         }
1865 skip_msi:
1866
1867         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1868             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1869         if (ret) {
1870                 qla_printk(KERN_WARNING, ha,
1871                     "Failed to reserve interrupt %d already in use.\n",
1872                     ha->pdev->irq);
1873                 goto fail;
1874         }
1875         ha->flags.inta_enabled = 1;
1876         ha->host->irq = ha->pdev->irq;
1877 clear_risc_ints:
1878
1879         ha->isp_ops->disable_intrs(ha);
1880         spin_lock_irqsave(&ha->hardware_lock, flags);
1881         if (IS_FWI2_CAPABLE(ha)) {
1882                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1883                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1884         } else {
1885                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1886                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1887                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1888         }
1889         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1890         ha->isp_ops->enable_intrs(ha);
1891
1892 fail:
1893         return ret;
1894 }
1895
1896 void
1897 qla2x00_free_irqs(scsi_qla_host_t *ha)
1898 {
1899
1900         if (ha->flags.msix_enabled)
1901                 qla24xx_disable_msix(ha);
1902         else if (ha->flags.inta_enabled) {
1903                 free_irq(ha->host->irq, ha);
1904                 pci_disable_msi(ha->pdev);
1905         }
1906 }