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         /* Check for overrun. */
 962         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
 963             scsi_status & SS_RESIDUAL_OVER)
 964                 comp_status = CS_DATA_OVERRUN;
 965
 966         /*
 967          * Based on Host and scsi status generate status code for Linux
 968          */
 969         switch (comp_status) {
 970         case CS_COMPLETE:
 971         case CS_QUEUE_FULL:
 972                 if (scsi_status == 0) {
 973                         cp->result = DID_OK << 16;
 974                         break;
 975                 }
 976                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 977                         resid = resid_len;
 978                         scsi_set_resid(cp, resid);
 979                         CMD_RESID_LEN(cp) = resid;
 980
 981                         if (!lscsi_status &&
 982                             ((unsigned)(scsi_bufflen(cp) - resid) <
 983                              cp->underflow)) {
 984                                 qla_printk(KERN_INFO, ha,
 985                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 986                                            "detected (%x of %x bytes)...returning "
 987                                            "error status.\n", ha->host_no,
 988                                            cp->device->channel, cp->device->id,
 989                                            cp->device->lun, resid,
 990                                            scsi_bufflen(cp));
 991
 992                                 cp->result = DID_ERROR << 16;
 993                                 break;
 994                         }
 995                 }
 996                 cp->result = DID_OK << 16 | lscsi_status;
 997
 998                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 999                         DEBUG2(printk(KERN_INFO
1000                             "scsi(%ld): QUEUE FULL status detected "
1001                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1002                             scsi_status));
1003
1004                         /* Adjust queue depth for all luns on the port. */
1005                         fcport->last_queue_full = jiffies;
1006                         starget_for_each_device(cp->device->sdev_target,
1007                             fcport, qla2x00_adjust_sdev_qdepth_down);
1008                         break;
1009                 }
1010                 if (lscsi_status != SS_CHECK_CONDITION)
1011                         break;
1012
1013                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1014                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1015                         break;
1016
1017                 qla2x00_handle_sense(sp, sense_data, sense_len);
1018                 break;
1019
1020         case CS_DATA_UNDERRUN:
1021                 resid = resid_len;
1022                 /* Use F/W calculated residual length. */
1023                 if (IS_FWI2_CAPABLE(ha)) {
1024                         if (scsi_status & SS_RESIDUAL_UNDER &&
1025                             resid != fw_resid_len) {
1026                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1027                                 lscsi_status = 0;
1028                         }
1029                         resid = fw_resid_len;
1030                 }
1031
1032                 if (scsi_status & SS_RESIDUAL_UNDER) {
1033                         scsi_set_resid(cp, resid);
1034                         CMD_RESID_LEN(cp) = resid;
1035                 } else {
1036                         DEBUG2(printk(KERN_INFO
1037                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1038                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1039                             "os_underflow=0x%x\n", ha->host_no,
1040                             cp->device->id, cp->device->lun, comp_status,
1041                             scsi_status, resid_len, resid, cp->cmnd[0],
1042                             cp->underflow));
1043
1044                 }
1045
1046                 /*
1047                  * Check to see if SCSI Status is non zero. If so report SCSI
1048                  * Status.
1049                  */
1050                 if (lscsi_status != 0) {
1051                         cp->result = DID_OK << 16 | lscsi_status;
1052
1053                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1054                                 DEBUG2(printk(KERN_INFO
1055                                     "scsi(%ld): QUEUE FULL status detected "
1056                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1057                                     scsi_status));
1058
1059                                 /*
1060                                  * Adjust queue depth for all luns on the
1061                                  * port.
1062                                  */
1063                                 fcport->last_queue_full = jiffies;
1064                                 starget_for_each_device(
1065                                     cp->device->sdev_target, fcport,
1066                                     qla2x00_adjust_sdev_qdepth_down);
1067                                 break;
1068                         }
1069                         if (lscsi_status != SS_CHECK_CONDITION)
1070                                 break;
1071
1072                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1073                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1074                                 break;
1075
1076                         qla2x00_handle_sense(sp, sense_data, sense_len);
1077
1078                         /*
1079                          * In case of a Underrun condition, set both the lscsi
1080                          * status and the completion status to appropriate
1081                          * values.
1082                          */
1083                         if (resid &&
1084                             ((unsigned)(scsi_bufflen(cp) - resid) <
1085                              cp->underflow)) {
1086                                 DEBUG2(qla_printk(KERN_INFO, ha,
1087                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1088                                     "detected (%x of %x bytes)...returning "
1089                                     "error status.\n", ha->host_no,
1090                                     cp->device->channel, cp->device->id,
1091                                     cp->device->lun, resid,
1092                                     scsi_bufflen(cp)));
1093
1094                                 cp->result = DID_ERROR << 16 | lscsi_status;
1095                         }
1096                 } else {
1097                         /*
1098                          * If RISC reports underrun and target does not report
1099                          * it then we must have a lost frame, so tell upper
1100                          * layer to retry it by reporting a bus busy.
1101                          */
1102                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1103                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1104                                               "frame(s) detected (%x of %x bytes)..."
1105                                               "retrying command.\n", ha->host_no,
1106                                               cp->device->channel, cp->device->id,
1107                                               cp->device->lun, resid,
1108                                               scsi_bufflen(cp)));
1109
1110                                 cp->result = DID_BUS_BUSY << 16;
1111                                 break;
1112                         }
1113
1114                         /* Handle mid-layer underflow */
1115                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1116                             cp->underflow) {
1117                                 qla_printk(KERN_INFO, ha,
1118                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1119                                            "detected (%x of %x bytes)...returning "
1120                                            "error status.\n", ha->host_no,
1121                                            cp->device->channel, cp->device->id,
1122                                            cp->device->lun, resid,
1123                                            scsi_bufflen(cp));
1124
1125                                 cp->result = DID_ERROR << 16;
1126                                 break;
1127                         }
1128
1129                         /* Everybody online, looking good... */
1130                         cp->result = DID_OK << 16;
1131                 }
1132                 break;
1133
1134         case CS_DATA_OVERRUN:
1135                 DEBUG2(printk(KERN_INFO
1136                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1137                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1138                     scsi_status));
1139                 DEBUG2(printk(KERN_INFO
1140                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1141                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1142                     cp->cmnd[4], cp->cmnd[5]));
1143                 DEBUG2(printk(KERN_INFO
1144                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1145                     "status!\n",
1146                     cp->serial_number, scsi_bufflen(cp), resid_len));
1147
1148                 cp->result = DID_ERROR << 16;
1149                 break;
1150
1151         case CS_PORT_LOGGED_OUT:
1152         case CS_PORT_CONFIG_CHG:
1153         case CS_PORT_BUSY:
1154         case CS_INCOMPLETE:
1155         case CS_PORT_UNAVAILABLE:
1156                 /*
1157                  * If the port is in Target Down state, return all IOs for this
1158                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1159                  * retry_queue.
1160                  */
1161                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1162                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1163                     ha->host_no, cp->device->id, cp->device->lun,
1164                     cp->serial_number, comp_status,
1165                     atomic_read(&fcport->state)));
1166
1167                 cp->result = DID_BUS_BUSY << 16;
1168                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1169                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1170                 }
1171                 break;
1172
1173         case CS_RESET:
1174                 DEBUG2(printk(KERN_INFO
1175                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1176                     ha->host_no, comp_status, scsi_status));
1177
1178                 cp->result = DID_RESET << 16;
1179                 break;
1180
1181         case CS_ABORTED:
1182                 /*
1183                  * hv2.19.12 - DID_ABORT does not retry the request if we
1184                  * aborted this request then abort otherwise it must be a
1185                  * reset.
1186                  */
1187                 DEBUG2(printk(KERN_INFO
1188                     "scsi(%ld): ABORT 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_TIMEOUT:
1195                 cp->result = DID_BUS_BUSY << 16;
1196
1197                 if (IS_FWI2_CAPABLE(ha)) {
1198                         DEBUG2(printk(KERN_INFO
1199                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1200                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1201                             cp->device->id, cp->device->lun, comp_status,
1202                             scsi_status));
1203                         break;
1204                 }
1205                 DEBUG2(printk(KERN_INFO
1206                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1207                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1208                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1209                     le16_to_cpu(sts->status_flags)));
1210
1211                 /* Check to see if logout occurred. */
1212                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1213                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1214                 break;
1215
1216         default:
1217                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1218                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1219                 qla_printk(KERN_INFO, ha,
1220                     "Unknown status detected 0x%x-0x%x.\n",
1221                     comp_status, scsi_status);
1222
1223                 cp->result = DID_ERROR << 16;
1224                 break;
1225         }
1226
1227         /* Place command on done queue. */
1228         if (ha->status_srb == NULL)
1229                 qla2x00_sp_compl(ha, sp);
1230 }
1231
1232 /**
1233  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1234  * @ha: SCSI driver HA context
1235  * @pkt: Entry pointer
1236  *
1237  * Extended sense data.
1238  */
1239 static void
1240 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1241 {
1242         uint8_t         sense_sz = 0;
1243         srb_t           *sp = ha->status_srb;
1244         struct scsi_cmnd *cp;
1245
1246         if (sp != NULL && sp->request_sense_length != 0) {
1247                 cp = sp->cmd;
1248                 if (cp == NULL) {
1249                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1250                             "sp=%p.\n", __func__, sp));
1251                         qla_printk(KERN_INFO, ha,
1252                             "cmd is NULL: already returned to OS (sp=%p)\n",
1253                             sp);
1254
1255                         ha->status_srb = NULL;
1256                         return;
1257                 }
1258
1259                 if (sp->request_sense_length > sizeof(pkt->data)) {
1260                         sense_sz = sizeof(pkt->data);
1261                 } else {
1262                         sense_sz = sp->request_sense_length;
1263                 }
1264
1265                 /* Move sense data. */
1266                 if (IS_FWI2_CAPABLE(ha))
1267                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1268                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1269                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1270
1271                 sp->request_sense_ptr += sense_sz;
1272                 sp->request_sense_length -= sense_sz;
1273
1274                 /* Place command on done queue. */
1275                 if (sp->request_sense_length == 0) {
1276                         ha->status_srb = NULL;
1277                         qla2x00_sp_compl(ha, sp);
1278                 }
1279         }
1280 }
1281
1282 /**
1283  * qla2x00_error_entry() - Process an error entry.
1284  * @ha: SCSI driver HA context
1285  * @pkt: Entry pointer
1286  */
1287 static void
1288 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1289 {
1290         srb_t *sp;
1291
1292 #if defined(QL_DEBUG_LEVEL_2)
1293         if (pkt->entry_status & RF_INV_E_ORDER)
1294                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1295         else if (pkt->entry_status & RF_INV_E_COUNT)
1296                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1297         else if (pkt->entry_status & RF_INV_E_PARAM)
1298                 qla_printk(KERN_ERR, ha,
1299                     "%s: Invalid Entry Parameter\n", __func__);
1300         else if (pkt->entry_status & RF_INV_E_TYPE)
1301                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1302         else if (pkt->entry_status & RF_BUSY)
1303                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1304         else
1305                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1306 #endif
1307
1308         /* Validate handle. */
1309         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1310                 sp = ha->outstanding_cmds[pkt->handle];
1311         else
1312                 sp = NULL;
1313
1314         if (sp) {
1315                 /* Free outstanding command slot. */
1316                 ha->outstanding_cmds[pkt->handle] = NULL;
1317
1318                 /* Bad payload or header */
1319                 if (pkt->entry_status &
1320                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1321                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1322                         sp->cmd->result = DID_ERROR << 16;
1323                 } else if (pkt->entry_status & RF_BUSY) {
1324                         sp->cmd->result = DID_BUS_BUSY << 16;
1325                 } else {
1326                         sp->cmd->result = DID_ERROR << 16;
1327                 }
1328                 qla2x00_sp_compl(ha, sp);
1329
1330         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1331             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1332                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1333                     ha->host_no));
1334                 qla_printk(KERN_WARNING, ha,
1335                     "Error entry - invalid handle\n");
1336
1337                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1338                 qla2xxx_wake_dpc(ha);
1339         }
1340 }
1341
1342 /**
1343  * qla2x00_ms_entry() - Process a Management Server entry.
1344  * @ha: SCSI driver HA context
1345  * @index: Response queue out pointer
1346  */
1347 static void
1348 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1349 {
1350         srb_t          *sp;
1351
1352         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1353             __func__, ha->host_no, pkt, pkt->handle1));
1354
1355         /* Validate handle. */
1356         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1357                 sp = ha->outstanding_cmds[pkt->handle1];
1358         else
1359                 sp = NULL;
1360
1361         if (sp == NULL) {
1362                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1363                     ha->host_no));
1364                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1365
1366                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1367                 return;
1368         }
1369
1370         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1371         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1372
1373         /* Free outstanding command slot. */
1374         ha->outstanding_cmds[pkt->handle1] = NULL;
1375
1376         qla2x00_sp_compl(ha, sp);
1377 }
1378
1379
1380 /**
1381  * qla24xx_mbx_completion() - Process mailbox command completions.
1382  * @ha: SCSI driver HA context
1383  * @mb0: Mailbox0 register
1384  */
1385 static void
1386 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1387 {
1388         uint16_t        cnt;
1389         uint16_t __iomem *wptr;
1390         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1391
1392         /* Load return mailbox registers. */
1393         ha->flags.mbox_int = 1;
1394         ha->mailbox_out[0] = mb0;
1395         wptr = (uint16_t __iomem *)&reg->mailbox1;
1396
1397         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1398                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1399                 wptr++;
1400         }
1401
1402         if (ha->mcp) {
1403                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1404                     __func__, ha->host_no, ha->mcp->mb[0]));
1405         } else {
1406                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1407                     __func__, ha->host_no));
1408         }
1409 }
1410
1411 /**
1412  * qla24xx_process_response_queue() - Process response queue entries.
1413  * @ha: SCSI driver HA context
1414  */
1415 void
1416 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1417 {
1418         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1419         struct sts_entry_24xx *pkt;
1420
1421         if (!ha->flags.online)
1422                 return;
1423
1424         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1425                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1426
1427                 ha->rsp_ring_index++;
1428                 if (ha->rsp_ring_index == ha->response_q_length) {
1429                         ha->rsp_ring_index = 0;
1430                         ha->response_ring_ptr = ha->response_ring;
1431                 } else {
1432                         ha->response_ring_ptr++;
1433                 }
1434
1435                 if (pkt->entry_status != 0) {
1436                         DEBUG3(printk(KERN_INFO
1437                             "scsi(%ld): Process error entry.\n", ha->host_no));
1438
1439                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1440                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1441                         wmb();
1442                         continue;
1443                 }
1444
1445                 switch (pkt->entry_type) {
1446                 case STATUS_TYPE:
1447                         qla2x00_status_entry(ha, pkt);
1448                         break;
1449                 case STATUS_CONT_TYPE:
1450                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1451                         break;
1452                 case MS_IOCB_TYPE:
1453                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1454                         break;
1455                 case VP_RPT_ID_IOCB_TYPE:
1456                         qla24xx_report_id_acquisition(ha,
1457                             (struct vp_rpt_id_entry_24xx *)pkt);
1458                         break;
1459                 default:
1460                         /* Type Not Supported. */
1461                         DEBUG4(printk(KERN_WARNING
1462                             "scsi(%ld): Received unknown response pkt type %x "
1463                             "entry status=%x.\n",
1464                             ha->host_no, pkt->entry_type, pkt->entry_status));
1465                         break;
1466                 }
1467                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1468                 wmb();
1469         }
1470
1471         /* Adjust ring index */
1472         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1473 }
1474
1475 static void
1476 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1477 {
1478         int rval;
1479         uint32_t cnt;
1480         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1481
1482         if (!IS_QLA25XX(ha))
1483                 return;
1484
1485         rval = QLA_SUCCESS;
1486         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1487         RD_REG_DWORD(&reg->iobase_addr);
1488         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1489         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1490             rval == QLA_SUCCESS; cnt--) {
1491                 if (cnt) {
1492                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1493                         udelay(10);
1494                 } else
1495                         rval = QLA_FUNCTION_TIMEOUT;
1496         }
1497         if (rval == QLA_SUCCESS)
1498                 goto next_test;
1499
1500         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1501         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1502             rval == QLA_SUCCESS; cnt--) {
1503                 if (cnt) {
1504                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1505                         udelay(10);
1506                 } else
1507                         rval = QLA_FUNCTION_TIMEOUT;
1508         }
1509         if (rval != QLA_SUCCESS)
1510                 goto done;
1511
1512 next_test:
1513         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1514                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1515
1516 done:
1517         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1518         RD_REG_DWORD(&reg->iobase_window);
1519 }
1520
1521 /**
1522  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1523  * @irq:
1524  * @dev_id: SCSI driver HA context
1525  *
1526  * Called by system whenever the host adapter generates an interrupt.
1527  *
1528  * Returns handled flag.
1529  */
1530 irqreturn_t
1531 qla24xx_intr_handler(int irq, void *dev_id)
1532 {
1533         scsi_qla_host_t *ha;
1534         struct device_reg_24xx __iomem *reg;
1535         int             status;
1536         unsigned long   flags;
1537         unsigned long   iter;
1538         uint32_t        stat;
1539         uint32_t        hccr;
1540         uint16_t        mb[4];
1541
1542         ha = (scsi_qla_host_t *) dev_id;
1543         if (!ha) {
1544                 printk(KERN_INFO
1545                     "%s(): NULL host pointer\n", __func__);
1546                 return IRQ_NONE;
1547         }
1548
1549         reg = &ha->iobase->isp24;
1550         status = 0;
1551
1552         spin_lock_irqsave(&ha->hardware_lock, flags);
1553         for (iter = 50; iter--; ) {
1554                 stat = RD_REG_DWORD(&reg->host_status);
1555                 if (stat & HSRX_RISC_PAUSED) {
1556                         if (pci_channel_offline(ha->pdev))
1557                                 break;
1558
1559                         hccr = RD_REG_DWORD(&reg->hccr);
1560
1561                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1562                             "Dumping firmware!\n", hccr);
1563
1564                         qla2xxx_check_risc_status(ha);
1565
1566                         ha->isp_ops->fw_dump(ha, 1);
1567                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1568                         break;
1569                 } else if ((stat & HSRX_RISC_INT) == 0)
1570                         break;
1571
1572                 switch (stat & 0xff) {
1573                 case 0x1:
1574                 case 0x2:
1575                 case 0x10:
1576                 case 0x11:
1577                         qla24xx_mbx_completion(ha, MSW(stat));
1578                         status |= MBX_INTERRUPT;
1579
1580                         break;
1581                 case 0x12:
1582                         mb[0] = MSW(stat);
1583                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1584                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1585                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1586                         qla2x00_async_event(ha, mb);
1587                         break;
1588                 case 0x13:
1589                         qla24xx_process_response_queue(ha);
1590                         break;
1591                 default:
1592                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1593                             "(%d).\n",
1594                             ha->host_no, stat & 0xff));
1595                         break;
1596                 }
1597                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1598                 RD_REG_DWORD_RELAXED(&reg->hccr);
1599         }
1600         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1601
1602         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1603             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1604                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1605                 complete(&ha->mbx_intr_comp);
1606         }
1607
1608         return IRQ_HANDLED;
1609 }
1610
1611 /**
1612  * qla24xx_ms_entry() - Process a Management Server entry.
1613  * @ha: SCSI driver HA context
1614  * @index: Response queue out pointer
1615  */
1616 static void
1617 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1618 {
1619         srb_t          *sp;
1620
1621         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1622             __func__, ha->host_no, pkt, pkt->handle));
1623
1624         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1625         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1626
1627         /* Validate handle. */
1628         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1629                 sp = ha->outstanding_cmds[pkt->handle];
1630         else
1631                 sp = NULL;
1632
1633         if (sp == NULL) {
1634                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1635                     ha->host_no));
1636                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1637                     ha->host_no));
1638                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1639                     pkt->handle);
1640
1641                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1642                 return;
1643         }
1644
1645         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1646         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1647
1648         /* Free outstanding command slot. */
1649         ha->outstanding_cmds[pkt->handle] = NULL;
1650
1651         qla2x00_sp_compl(ha, sp);
1652 }
1653
1654 static irqreturn_t
1655 qla24xx_msix_rsp_q(int irq, void *dev_id)
1656 {
1657         scsi_qla_host_t *ha;
1658         struct device_reg_24xx __iomem *reg;
1659         unsigned long flags;
1660
1661         ha = dev_id;
1662         reg = &ha->iobase->isp24;
1663
1664         spin_lock_irqsave(&ha->hardware_lock, flags);
1665
1666         qla24xx_process_response_queue(ha);
1667
1668         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1669
1670         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1671
1672         return IRQ_HANDLED;
1673 }
1674
1675 static irqreturn_t
1676 qla24xx_msix_default(int irq, void *dev_id)
1677 {
1678         scsi_qla_host_t *ha;
1679         struct device_reg_24xx __iomem *reg;
1680         int             status;
1681         unsigned long   flags;
1682         uint32_t        stat;
1683         uint32_t        hccr;
1684         uint16_t        mb[4];
1685
1686         ha = dev_id;
1687         reg = &ha->iobase->isp24;
1688         status = 0;
1689
1690         spin_lock_irqsave(&ha->hardware_lock, flags);
1691         do {
1692                 stat = RD_REG_DWORD(&reg->host_status);
1693                 if (stat & HSRX_RISC_PAUSED) {
1694                         if (pci_channel_offline(ha->pdev))
1695                                 break;
1696
1697                         hccr = RD_REG_DWORD(&reg->hccr);
1698
1699                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1700                             "Dumping firmware!\n", hccr);
1701
1702                         qla2xxx_check_risc_status(ha);
1703
1704                         ha->isp_ops->fw_dump(ha, 1);
1705                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1706                         break;
1707                 } else if ((stat & HSRX_RISC_INT) == 0)
1708                         break;
1709
1710                 switch (stat & 0xff) {
1711                 case 0x1:
1712                 case 0x2:
1713                 case 0x10:
1714                 case 0x11:
1715                         qla24xx_mbx_completion(ha, MSW(stat));
1716                         status |= MBX_INTERRUPT;
1717
1718                         break;
1719                 case 0x12:
1720                         mb[0] = MSW(stat);
1721                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1722                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1723                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1724                         qla2x00_async_event(ha, mb);
1725                         break;
1726                 case 0x13:
1727                         qla24xx_process_response_queue(ha);
1728                         break;
1729                 default:
1730                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1731                             "(%d).\n",
1732                             ha->host_no, stat & 0xff));
1733                         break;
1734                 }
1735                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1736         } while (0);
1737         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1738
1739         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1740             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1741                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1742                 complete(&ha->mbx_intr_comp);
1743         }
1744
1745         return IRQ_HANDLED;
1746 }
1747
1748 /* Interrupt handling helpers. */
1749
1750 struct qla_init_msix_entry {
1751         uint16_t entry;
1752         uint16_t index;
1753         const char *name;
1754         irq_handler_t handler;
1755 };
1756
1757 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1758         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1759                 "qla2xxx (default)", qla24xx_msix_default },
1760
1761         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1762                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1763 };
1764
1765 static void
1766 qla24xx_disable_msix(scsi_qla_host_t *ha)
1767 {
1768         int i;
1769         struct qla_msix_entry *qentry;
1770
1771         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1772                 qentry = &ha->msix_entries[imsix_entries[i].index];
1773                 if (qentry->have_irq)
1774                         free_irq(qentry->msix_vector, ha);
1775         }
1776         pci_disable_msix(ha->pdev);
1777 }
1778
1779 static int
1780 qla24xx_enable_msix(scsi_qla_host_t *ha)
1781 {
1782         int i, ret;
1783         struct msix_entry entries[QLA_MSIX_ENTRIES];
1784         struct qla_msix_entry *qentry;
1785
1786         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1787                 entries[i].entry = imsix_entries[i].entry;
1788
1789         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1790         if (ret) {
1791                 qla_printk(KERN_WARNING, ha,
1792                     "MSI-X: Failed to enable support -- %d/%d\n",
1793                     QLA_MSIX_ENTRIES, ret);
1794                 goto msix_out;
1795         }
1796         ha->flags.msix_enabled = 1;
1797
1798         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1799                 qentry = &ha->msix_entries[imsix_entries[i].index];
1800                 qentry->msix_vector = entries[i].vector;
1801                 qentry->msix_entry = entries[i].entry;
1802                 qentry->have_irq = 0;
1803                 ret = request_irq(qentry->msix_vector,
1804                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1805                 if (ret) {
1806                         qla_printk(KERN_WARNING, ha,
1807                             "MSI-X: Unable to register handler -- %x/%d.\n",
1808                             imsix_entries[i].index, ret);
1809                         qla24xx_disable_msix(ha);
1810                         goto msix_out;
1811                 }
1812                 qentry->have_irq = 1;
1813         }
1814
1815 msix_out:
1816         return ret;
1817 }
1818
1819 int
1820 qla2x00_request_irqs(scsi_qla_host_t *ha)
1821 {
1822         int ret;
1823         device_reg_t __iomem *reg = ha->iobase;
1824         unsigned long flags;
1825
1826         /* If possible, enable MSI-X. */
1827         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1828                 goto skip_msix;
1829
1830         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1831             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1832                 DEBUG2(qla_printk(KERN_WARNING, ha,
1833                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1834                     ha->chip_revision, ha->fw_attributes));
1835
1836                 goto skip_msix;
1837         }
1838
1839         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1840             (ha->pdev->subsystem_device == 0x7040 ||
1841                 ha->pdev->subsystem_device == 0x7041 ||
1842                 ha->pdev->subsystem_device == 0x1705)) {
1843                 DEBUG2(qla_printk(KERN_WARNING, ha,
1844                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1845                     ha->pdev->subsystem_vendor,
1846                     ha->pdev->subsystem_device));
1847
1848                 goto skip_msi;
1849         }
1850
1851         ret = qla24xx_enable_msix(ha);
1852         if (!ret) {
1853                 DEBUG2(qla_printk(KERN_INFO, ha,
1854                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1855                     ha->fw_attributes));
1856                 goto clear_risc_ints;
1857         }
1858         qla_printk(KERN_WARNING, ha,
1859             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1860 skip_msix:
1861
1862         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1863                 goto skip_msi;
1864
1865         ret = pci_enable_msi(ha->pdev);
1866         if (!ret) {
1867                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1868                 ha->flags.msi_enabled = 1;
1869         }
1870 skip_msi:
1871
1872         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1873             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1874         if (ret) {
1875                 qla_printk(KERN_WARNING, ha,
1876                     "Failed to reserve interrupt %d already in use.\n",
1877                     ha->pdev->irq);
1878                 goto fail;
1879         }
1880         ha->flags.inta_enabled = 1;
1881         ha->host->irq = ha->pdev->irq;
1882 clear_risc_ints:
1883
1884         ha->isp_ops->disable_intrs(ha);
1885         spin_lock_irqsave(&ha->hardware_lock, flags);
1886         if (IS_FWI2_CAPABLE(ha)) {
1887                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1888                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1889         } else {
1890                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1891                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1892                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1893         }
1894         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1895         ha->isp_ops->enable_intrs(ha);
1896
1897 fail:
1898         return ret;
1899 }
1900
1901 void
1902 qla2x00_free_irqs(scsi_qla_host_t *ha)
1903 {
1904
1905         if (ha->flags.msix_enabled)
1906                 qla24xx_disable_msix(ha);
1907         else if (ha->flags.inta_enabled) {
1908                 free_irq(ha->host->irq, ha);
1909                 pci_disable_msi(ha->pdev);
1910         }
1911 }