drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/delay.h>
  10 #include <scsi/scsi_tcq.h>
  11
  12 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  17
  18 /**
  19  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  20  * @irq:
  21  * @dev_id: SCSI driver HA context
  22  *
  23  * Called by system whenever the host adapter generates an interrupt.
  24  *
  25  * Returns handled flag.
  26  */
  27 irqreturn_t
  28 qla2100_intr_handler(int irq, void *dev_id)
  29 {
  30         scsi_qla_host_t *ha;
  31         struct device_reg_2xxx __iomem *reg;
  32         int             status;
  33         unsigned long   iter;
  34         uint16_t        hccr;
  35         uint16_t        mb[4];
  36
  37         ha = (scsi_qla_host_t *) dev_id;
  38         if (!ha) {
  39                 printk(KERN_INFO
  40                     "%s(): NULL host pointer\n", __func__);
  41                 return (IRQ_NONE);
  42         }
  43
  44         reg = &ha->iobase->isp;
  45         status = 0;
  46
  47         spin_lock(&ha->hardware_lock);
  48         for (iter = 50; iter--; ) {
  49                 hccr = RD_REG_WORD(&reg->hccr);
  50                 if (hccr & HCCR_RISC_PAUSE) {
  51                         if (pci_channel_offline(ha->pdev))
  52                                 break;
  53
  54                         /*
  55                          * Issue a "HARD" reset in order for the RISC interrupt
  56                          * bit to be cleared.  Schedule a big hammmer to get
  57                          * out of the RISC PAUSED state.
  58                          */
  59                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  60                         RD_REG_WORD(&reg->hccr);
  61
  62                         ha->isp_ops->fw_dump(ha, 1);
  63                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  64                         break;
  65                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  66                         break;
  67
  68                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  69                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  70                         RD_REG_WORD(&reg->hccr);
  71
  72                         /* Get mailbox data. */
  73                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  74                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  75                                 qla2x00_mbx_completion(ha, mb[0]);
  76                                 status |= MBX_INTERRUPT;
  77                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  78                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  79                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  80                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  81                                 qla2x00_async_event(ha, mb);
  82                         } else {
  83                                 /*EMPTY*/
  84                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  85                                     "interrupt type (%d).\n",
  86                                     ha->host_no, mb[0]));
  87                         }
  88                         /* Release mailbox registers. */
  89                         WRT_REG_WORD(&reg->semaphore, 0);
  90                         RD_REG_WORD(&reg->semaphore);
  91                 } else {
  92                         qla2x00_process_response_queue(ha);
  93
  94                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  95                         RD_REG_WORD(&reg->hccr);
  96                 }
  97         }
  98         spin_unlock(&ha->hardware_lock);
  99
 100         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 101             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 102                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 103                 complete(&ha->mbx_intr_comp);
 104         }
 105
 106         return (IRQ_HANDLED);
 107 }
 108
 109 /**
 110  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 111  * @irq:
 112  * @dev_id: SCSI driver HA context
 113  *
 114  * Called by system whenever the host adapter generates an interrupt.
 115  *
 116  * Returns handled flag.
 117  */
 118 irqreturn_t
 119 qla2300_intr_handler(int irq, void *dev_id)
 120 {
 121         scsi_qla_host_t *ha;
 122         struct device_reg_2xxx __iomem *reg;
 123         int             status;
 124         unsigned long   iter;
 125         uint32_t        stat;
 126         uint16_t        hccr;
 127         uint16_t        mb[4];
 128
 129         ha = (scsi_qla_host_t *) dev_id;
 130         if (!ha) {
 131                 printk(KERN_INFO
 132                     "%s(): NULL host pointer\n", __func__);
 133                 return (IRQ_NONE);
 134         }
 135
 136         reg = &ha->iobase->isp;
 137         status = 0;
 138
 139         spin_lock(&ha->hardware_lock);
 140         for (iter = 50; iter--; ) {
 141                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 142                 if (stat & HSR_RISC_PAUSED) {
 143                         if (pci_channel_offline(ha->pdev))
 144                                 break;
 145
 146                         hccr = RD_REG_WORD(&reg->hccr);
 147                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 148                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 149                                     "HCCR=%x, Dumping firmware!\n", hccr);
 150                         else
 151                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 152                                     "HCCR=%x, Dumping firmware!\n", hccr);
 153
 154                         /*
 155                          * Issue a "HARD" reset in order for the RISC
 156                          * interrupt bit to be cleared.  Schedule a big
 157                          * hammmer to get out of the RISC PAUSED state.
 158                          */
 159                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 160                         RD_REG_WORD(&reg->hccr);
 161
 162                         ha->isp_ops->fw_dump(ha, 1);
 163                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 164                         break;
 165                 } else if ((stat & HSR_RISC_INT) == 0)
 166                         break;
 167
 168                 switch (stat & 0xff) {
 169                 case 0x1:
 170                 case 0x2:
 171                 case 0x10:
 172                 case 0x11:
 173                         qla2x00_mbx_completion(ha, MSW(stat));
 174                         status |= MBX_INTERRUPT;
 175
 176                         /* Release mailbox registers. */
 177                         WRT_REG_WORD(&reg->semaphore, 0);
 178                         break;
 179                 case 0x12:
 180                         mb[0] = MSW(stat);
 181                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 182                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 183                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 184                         qla2x00_async_event(ha, mb);
 185                         break;
 186                 case 0x13:
 187                         qla2x00_process_response_queue(ha);
 188                         break;
 189                 case 0x15:
 190                         mb[0] = MBA_CMPLT_1_16BIT;
 191                         mb[1] = MSW(stat);
 192                         qla2x00_async_event(ha, mb);
 193                         break;
 194                 case 0x16:
 195                         mb[0] = MBA_SCSI_COMPLETION;
 196                         mb[1] = MSW(stat);
 197                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 198                         qla2x00_async_event(ha, mb);
 199                         break;
 200                 default:
 201                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 202                             "(%d).\n",
 203                             ha->host_no, stat & 0xff));
 204                         break;
 205                 }
 206                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 207                 RD_REG_WORD_RELAXED(&reg->hccr);
 208         }
 209         spin_unlock(&ha->hardware_lock);
 210
 211         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 212             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 213                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 214                 complete(&ha->mbx_intr_comp);
 215         }
 216
 217         return (IRQ_HANDLED);
 218 }
 219
 220 /**
 221  * qla2x00_mbx_completion() - Process mailbox command completions.
 222  * @ha: SCSI driver HA context
 223  * @mb0: Mailbox0 register
 224  */
 225 static void
 226 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 227 {
 228         uint16_t        cnt;
 229         uint16_t __iomem *wptr;
 230         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 231
 232         /* Load return mailbox registers. */
 233         ha->flags.mbox_int = 1;
 234         ha->mailbox_out[0] = mb0;
 235         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 236
 237         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 238                 if (IS_QLA2200(ha) && cnt == 8)
 239                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 240                 if (cnt == 4 || cnt == 5)
 241                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 242                 else
 243                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 244
 245                 wptr++;
 246         }
 247
 248         if (ha->mcp) {
 249                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 250                     __func__, ha->host_no, ha->mcp->mb[0]));
 251         } else {
 252                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 253                     __func__, ha->host_no));
 254         }
 255 }
 256
 257 /**
 258  * qla2x00_async_event() - Process aynchronous events.
 259  * @ha: SCSI driver HA context
 260  * @mb: Mailbox registers (0 - 3)
 261  */
 262 void
 263 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 264 {
 265 #define LS_UNKNOWN      2
 266         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 267         char            *link_speed;
 268         uint16_t        handle_cnt;
 269         uint16_t        cnt;
 270         uint32_t        handles[5];
 271         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 272         uint32_t        rscn_entry, host_pid;
 273         uint8_t         rscn_queue_index;
 274         unsigned long   flags;
 275
 276         /* Setup to process RIO completion. */
 277         handle_cnt = 0;
 278         switch (mb[0]) {
 279         case MBA_SCSI_COMPLETION:
 280                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 281                 handle_cnt = 1;
 282                 break;
 283         case MBA_CMPLT_1_16BIT:
 284                 handles[0] = mb[1];
 285                 handle_cnt = 1;
 286                 mb[0] = MBA_SCSI_COMPLETION;
 287                 break;
 288         case MBA_CMPLT_2_16BIT:
 289                 handles[0] = mb[1];
 290                 handles[1] = mb[2];
 291                 handle_cnt = 2;
 292                 mb[0] = MBA_SCSI_COMPLETION;
 293                 break;
 294         case MBA_CMPLT_3_16BIT:
 295                 handles[0] = mb[1];
 296                 handles[1] = mb[2];
 297                 handles[2] = mb[3];
 298                 handle_cnt = 3;
 299                 mb[0] = MBA_SCSI_COMPLETION;
 300                 break;
 301         case MBA_CMPLT_4_16BIT:
 302                 handles[0] = mb[1];
 303                 handles[1] = mb[2];
 304                 handles[2] = mb[3];
 305                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 306                 handle_cnt = 4;
 307                 mb[0] = MBA_SCSI_COMPLETION;
 308                 break;
 309         case MBA_CMPLT_5_16BIT:
 310                 handles[0] = mb[1];
 311                 handles[1] = mb[2];
 312                 handles[2] = mb[3];
 313                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 314                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 315                 handle_cnt = 5;
 316                 mb[0] = MBA_SCSI_COMPLETION;
 317                 break;
 318         case MBA_CMPLT_2_32BIT:
 319                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 320                 handles[1] = le32_to_cpu(
 321                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 322                     RD_MAILBOX_REG(ha, reg, 6));
 323                 handle_cnt = 2;
 324                 mb[0] = MBA_SCSI_COMPLETION;
 325                 break;
 326         default:
 327                 break;
 328         }
 329
 330         switch (mb[0]) {
 331         case MBA_SCSI_COMPLETION:       /* Fast Post */
 332                 if (!ha->flags.online)
 333                         break;
 334
 335                 for (cnt = 0; cnt < handle_cnt; cnt++)
 336                         qla2x00_process_completed_request(ha, handles[cnt]);
 337                 break;
 338
 339         case MBA_RESET:                 /* Reset */
 340                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 341
 342                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 343                 break;
 344
 345         case MBA_SYSTEM_ERR:            /* System Error */
 346                 qla_printk(KERN_INFO, ha,
 347                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 348                     mb[1], mb[2], mb[3]);
 349
 350                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 351                 ha->isp_ops->fw_dump(ha, 1);
 352
 353                 if (IS_FWI2_CAPABLE(ha)) {
 354                         if (mb[1] == 0 && mb[2] == 0) {
 355                                 qla_printk(KERN_ERR, ha,
 356                                     "Unrecoverable Hardware Error: adapter "
 357                                     "marked OFFLINE!\n");
 358                                 ha->flags.online = 0;
 359                         } else
 360                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 361                 } else if (mb[1] == 0) {
 362                         qla_printk(KERN_INFO, ha,
 363                             "Unrecoverable Hardware Error: adapter marked "
 364                             "OFFLINE!\n");
 365                         ha->flags.online = 0;
 366                 } else
 367                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 368                 break;
 369
 370         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 371                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 372                     ha->host_no));
 373                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 374
 375                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 380                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 381                     ha->host_no));
 382                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 383
 384                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 385                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 386                 break;
 387
 388         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 389                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 390                     ha->host_no));
 391                 break;
 392
 393         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 394                 DEBUG2(printk("scsi(%ld): LIP occurred (%x).\n", ha->host_no,
 395                     mb[1]));
 396                 qla_printk(KERN_INFO, ha, "LIP occurred (%x).\n", mb[1]);
 397
 398                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 399                         atomic_set(&ha->loop_state, LOOP_DOWN);
 400                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 401                         qla2x00_mark_all_devices_lost(ha, 1);
 402                 }
 403
 404                 if (ha->parent) {
 405                         atomic_set(&ha->vp_state, VP_FAILED);
 406                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 407                 }
 408
 409                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 410                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 411
 412                 ha->flags.management_server_logged_in = 0;
 413                 qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
 414                 break;
 415
 416         case MBA_LOOP_UP:               /* Loop Up Event */
 417                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 418                         link_speed = link_speeds[0];
 419                         ha->link_data_rate = PORT_SPEED_1GB;
 420                 } else {
 421                         link_speed = link_speeds[LS_UNKNOWN];
 422                         if (mb[1] < 5)
 423                                 link_speed = link_speeds[mb[1]];
 424                         ha->link_data_rate = mb[1];
 425                 }
 426
 427                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 428                     ha->host_no, link_speed));
 429                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 430                     link_speed);
 431
 432                 ha->flags.management_server_logged_in = 0;
 433                 qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
 434                 break;
 435
 436         case MBA_LOOP_DOWN:             /* Loop Down Event */
 437                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
 438                     "(%x %x %x).\n", ha->host_no, mb[1], mb[2], mb[3]));
 439                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
 440                     mb[1], mb[2], mb[3]);
 441
 442                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 443                         atomic_set(&ha->loop_state, LOOP_DOWN);
 444                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 445                         ha->device_flags |= DFLG_NO_CABLE;
 446                         qla2x00_mark_all_devices_lost(ha, 1);
 447                 }
 448
 449                 if (ha->parent) {
 450                         atomic_set(&ha->vp_state, VP_FAILED);
 451                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 452                 }
 453
 454                 ha->flags.management_server_logged_in = 0;
 455                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 456                 qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
 457                 break;
 458
 459         case MBA_LIP_RESET:             /* LIP reset occurred */
 460                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 461                     ha->host_no, mb[1]));
 462                 qla_printk(KERN_INFO, ha,
 463                     "LIP reset occurred (%x).\n", mb[1]);
 464
 465                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 466                         atomic_set(&ha->loop_state, LOOP_DOWN);
 467                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 468                         qla2x00_mark_all_devices_lost(ha, 1);
 469                 }
 470
 471                 if (ha->parent) {
 472                         atomic_set(&ha->vp_state, VP_FAILED);
 473                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 474                 }
 475
 476                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 477
 478                 ha->operating_mode = LOOP;
 479                 ha->flags.management_server_logged_in = 0;
 480                 qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
 481                 break;
 482
 483         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 484                 if (IS_QLA2100(ha))
 485                         break;
 486
 487                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 488                     ha->host_no));
 489
 490                 /*
 491                  * Until there's a transition from loop down to loop up, treat
 492                  * this as loop down only.
 493                  */
 494                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 495                         atomic_set(&ha->loop_state, LOOP_DOWN);
 496                         if (!atomic_read(&ha->loop_down_timer))
 497                                 atomic_set(&ha->loop_down_timer,
 498                                     LOOP_DOWN_TIME);
 499                         qla2x00_mark_all_devices_lost(ha, 1);
 500                 }
 501
 502                 if (ha->parent) {
 503                         atomic_set(&ha->vp_state, VP_FAILED);
 504                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 505                 }
 506
 507                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 508                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 509                 }
 510                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 511                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 512
 513                 ha->flags.gpsc_supported = 1;
 514                 ha->flags.management_server_logged_in = 0;
 515                 break;
 516
 517         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 518                 if (IS_QLA2100(ha))
 519                         break;
 520
 521                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 522                     "received.\n",
 523                     ha->host_no));
 524                 qla_printk(KERN_INFO, ha,
 525                     "Configuration change detected: value=%x.\n", mb[1]);
 526
 527                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 528                         atomic_set(&ha->loop_state, LOOP_DOWN);
 529                         if (!atomic_read(&ha->loop_down_timer))
 530                                 atomic_set(&ha->loop_down_timer,
 531                                     LOOP_DOWN_TIME);
 532                         qla2x00_mark_all_devices_lost(ha, 1);
 533                 }
 534
 535                 if (ha->parent) {
 536                         atomic_set(&ha->vp_state, VP_FAILED);
 537                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 538                 }
 539
 540                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 541                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 542                 break;
 543
 544         case MBA_PORT_UPDATE:           /* Port database update */
 545                 /*
 546                  * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
 547                  * event etc. earlier indicating loop is down) then process
 548                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 549                  */
 550                 atomic_set(&ha->loop_down_timer, 0);
 551                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 552                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 553                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 554                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 555                             mb[2], mb[3]));
 556                         break;
 557                 }
 558
 559                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 560                     ha->host_no));
 561                 DEBUG(printk(KERN_INFO
 562                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 563                     ha->host_no, mb[1], mb[2], mb[3]));
 564
 565                 /*
 566                  * Mark all devices as missing so we will login again.
 567                  */
 568                 atomic_set(&ha->loop_state, LOOP_UP);
 569
 570                 qla2x00_mark_all_devices_lost(ha, 1);
 571
 572                 ha->flags.rscn_queue_overflow = 1;
 573
 574                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 575                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 576                 break;
 577
 578         case MBA_RSCN_UPDATE:           /* State Change Registration */
 579                 /* Check if the Vport has issued a SCR */
 580                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 581                         break;
 582                 /* Only handle SCNs for our Vport index. */
 583                 if (ha->parent && ha->vp_idx != (mb[3] & 0xff))
 584                         break;
 585
 586                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 587                     ha->host_no));
 588                 DEBUG(printk(KERN_INFO
 589                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 590                     ha->host_no, mb[1], mb[2], mb[3]));
 591
 592                 rscn_entry = ((mb[1] & 0xff) << 16) | mb[2];
 593                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 594                     ha->d_id.b.al_pa;
 595                 if (rscn_entry == host_pid) {
 596                         DEBUG(printk(KERN_INFO
 597                             "scsi(%ld): Ignoring RSCN update to local host "
 598                             "port ID (%06x)\n",
 599                             ha->host_no, host_pid));
 600                         break;
 601                 }
 602
 603                 /* Ignore reserved bits from RSCN-payload. */
 604                 rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];
 605                 rscn_queue_index = ha->rscn_in_ptr + 1;
 606                 if (rscn_queue_index == MAX_RSCN_COUNT)
 607                         rscn_queue_index = 0;
 608                 if (rscn_queue_index != ha->rscn_out_ptr) {
 609                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 610                         ha->rscn_in_ptr = rscn_queue_index;
 611                 } else {
 612                         ha->flags.rscn_queue_overflow = 1;
 613                 }
 614
 615                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 616                 atomic_set(&ha->loop_down_timer, 0);
 617                 ha->flags.management_server_logged_in = 0;
 618
 619                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 620                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 621                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
 622                 break;
 623
 624         /* case MBA_RIO_RESPONSE: */
 625         case MBA_ZIO_RESPONSE:
 626                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 627                     ha->host_no));
 628                 DEBUG(printk(KERN_INFO
 629                     "scsi(%ld): [R|Z]IO update completion.\n",
 630                     ha->host_no));
 631
 632                 if (IS_FWI2_CAPABLE(ha))
 633                         qla24xx_process_response_queue(ha);
 634                 else
 635                         qla2x00_process_response_queue(ha);
 636                 break;
 637
 638         case MBA_DISCARD_RND_FRAME:
 639                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 640                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 641                 break;
 642
 643         case MBA_TRACE_NOTIFICATION:
 644                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 645                 ha->host_no, mb[1], mb[2]));
 646                 break;
 647
 648         case MBA_ISP84XX_ALERT:
 649                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
 650                     "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));
 651
 652                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
 653                 switch (mb[1]) {
 654                 case A84_PANIC_RECOVERY:
 655                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
 656                             "%04x %04x\n", mb[2], mb[3]);
 657                         break;
 658                 case A84_OP_LOGIN_COMPLETE:
 659                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
 660                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 661                             "firmware version %x\n", ha->cs84xx->op_fw_version));
 662                         break;
 663                 case A84_DIAG_LOGIN_COMPLETE:
 664                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 665                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 666                             "diagnostic firmware version %x\n",
 667                             ha->cs84xx->diag_fw_version));
 668                         break;
 669                 case A84_GOLD_LOGIN_COMPLETE:
 670                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 671                         ha->cs84xx->fw_update = 1;
 672                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
 673                             "firmware version %x\n",
 674                             ha->cs84xx->gold_fw_version));
 675                         break;
 676                 default:
 677                         qla_printk(KERN_ERR, ha,
 678                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
 679                             mb[1], mb[2], mb[3]);
 680                 }
 681                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
 682                 break;
 683         }
 684
 685         if (!ha->parent && ha->num_vhosts)
 686                 qla2x00_alert_all_vps(ha, mb);
 687 }
 688
 689 static void
 690 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 691 {
 692         fc_port_t *fcport = data;
 693
 694         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 695                 return;
 696
 697         if (sdev->ordered_tags)
 698                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 699                     sdev->queue_depth + 1);
 700         else
 701                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 702                     sdev->queue_depth + 1);
 703
 704         fcport->last_ramp_up = jiffies;
 705
 706         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 707             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 708             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 709             sdev->queue_depth));
 710 }
 711
 712 static void
 713 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 714 {
 715         fc_port_t *fcport = data;
 716
 717         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 718                 return;
 719
 720         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 721             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 722             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 723             sdev->queue_depth));
 724 }
 725
 726 static inline void
 727 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 728 {
 729         fc_port_t *fcport;
 730         struct scsi_device *sdev;
 731
 732         sdev = sp->cmd->device;
 733         if (sdev->queue_depth >= ha->max_q_depth)
 734                 return;
 735
 736         fcport = sp->fcport;
 737         if (time_before(jiffies,
 738             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 739                 return;
 740         if (time_before(jiffies,
 741             fcport->last_queue_full + ql2xqfullrampup * HZ))
 742                 return;
 743
 744         starget_for_each_device(sdev->sdev_target, fcport,
 745             qla2x00_adjust_sdev_qdepth_up);
 746 }
 747
 748 /**
 749  * qla2x00_process_completed_request() - Process a Fast Post response.
 750  * @ha: SCSI driver HA context
 751  * @index: SRB index
 752  */
 753 static void
 754 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 755 {
 756         srb_t *sp;
 757
 758         /* Validate handle. */
 759         if (index >= MAX_OUTSTANDING_COMMANDS) {
 760                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 761                     ha->host_no, index));
 762                 qla_printk(KERN_WARNING, ha,
 763                     "Invalid SCSI completion handle %d.\n", index);
 764
 765                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 766                 return;
 767         }
 768
 769         sp = ha->outstanding_cmds[index];
 770         if (sp) {
 771                 /* Free outstanding command slot. */
 772                 ha->outstanding_cmds[index] = NULL;
 773
 774                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 775                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 776
 777                 /* Save ISP completion status */
 778                 sp->cmd->result = DID_OK << 16;
 779
 780                 qla2x00_ramp_up_queue_depth(ha, sp);
 781                 qla2x00_sp_compl(ha, sp);
 782         } else {
 783                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 784                     ha->host_no));
 785                 qla_printk(KERN_WARNING, ha,
 786                     "Invalid ISP SCSI completion handle\n");
 787
 788                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 789         }
 790 }
 791
 792 /**
 793  * qla2x00_process_response_queue() - Process response queue entries.
 794  * @ha: SCSI driver HA context
 795  */
 796 void
 797 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 798 {
 799         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 800         sts_entry_t     *pkt;
 801         uint16_t        handle_cnt;
 802         uint16_t        cnt;
 803
 804         if (!ha->flags.online)
 805                 return;
 806
 807         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 808                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 809
 810                 ha->rsp_ring_index++;
 811                 if (ha->rsp_ring_index == ha->response_q_length) {
 812                         ha->rsp_ring_index = 0;
 813                         ha->response_ring_ptr = ha->response_ring;
 814                 } else {
 815                         ha->response_ring_ptr++;
 816                 }
 817
 818                 if (pkt->entry_status != 0) {
 819                         DEBUG3(printk(KERN_INFO
 820                             "scsi(%ld): Process error entry.\n", ha->host_no));
 821
 822                         qla2x00_error_entry(ha, pkt);
 823                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 824                         wmb();
 825                         continue;
 826                 }
 827
 828                 switch (pkt->entry_type) {
 829                 case STATUS_TYPE:
 830                         qla2x00_status_entry(ha, pkt);
 831                         break;
 832                 case STATUS_TYPE_21:
 833                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 834                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 835                                 qla2x00_process_completed_request(ha,
 836                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 837                         }
 838                         break;
 839                 case STATUS_TYPE_22:
 840                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 841                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 842                                 qla2x00_process_completed_request(ha,
 843                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 844                         }
 845                         break;
 846                 case STATUS_CONT_TYPE:
 847                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 848                         break;
 849                 default:
 850                         /* Type Not Supported. */
 851                         DEBUG4(printk(KERN_WARNING
 852                             "scsi(%ld): Received unknown response pkt type %x "
 853                             "entry status=%x.\n",
 854                             ha->host_no, pkt->entry_type, pkt->entry_status));
 855                         break;
 856                 }
 857                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 858                 wmb();
 859         }
 860
 861         /* Adjust ring index */
 862         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 863 }
 864
 865 static inline void
 866 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 867 {
 868         struct scsi_cmnd *cp = sp->cmd;
 869
 870         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 871                 sense_len = SCSI_SENSE_BUFFERSIZE;
 872
 873         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 874         sp->request_sense_length = sense_len;
 875         sp->request_sense_ptr = cp->sense_buffer;
 876         if (sp->request_sense_length > 32)
 877                 sense_len = 32;
 878
 879         memcpy(cp->sense_buffer, sense_data, sense_len);
 880
 881         sp->request_sense_ptr += sense_len;
 882         sp->request_sense_length -= sense_len;
 883         if (sp->request_sense_length != 0)
 884                 sp->fcport->ha->status_srb = sp;
 885
 886         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 887             "cmd=%p pid=%ld\n", __func__, sp->fcport->ha->host_no,
 888             cp->device->channel, cp->device->id, cp->device->lun, cp,
 889             cp->serial_number));
 890         if (sense_len)
 891                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 892                     CMD_ACTUAL_SNSLEN(cp)));
 893 }
 894
 895 /**
 896  * qla2x00_status_entry() - Process a Status IOCB entry.
 897  * @ha: SCSI driver HA context
 898  * @pkt: Entry pointer
 899  */
 900 static void
 901 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 902 {
 903         srb_t           *sp;
 904         fc_port_t       *fcport;
 905         struct scsi_cmnd *cp;
 906         sts_entry_t *sts;
 907         struct sts_entry_24xx *sts24;
 908         uint16_t        comp_status;
 909         uint16_t        scsi_status;
 910         uint8_t         lscsi_status;
 911         int32_t         resid;
 912         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 913         uint8_t         *rsp_info, *sense_data;
 914
 915         sts = (sts_entry_t *) pkt;
 916         sts24 = (struct sts_entry_24xx *) pkt;
 917         if (IS_FWI2_CAPABLE(ha)) {
 918                 comp_status = le16_to_cpu(sts24->comp_status);
 919                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 920         } else {
 921                 comp_status = le16_to_cpu(sts->comp_status);
 922                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 923         }
 924
 925         /* Fast path completion. */
 926         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 927                 qla2x00_process_completed_request(ha, sts->handle);
 928
 929                 return;
 930         }
 931
 932         /* Validate handle. */
 933         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 934                 sp = ha->outstanding_cmds[sts->handle];
 935                 ha->outstanding_cmds[sts->handle] = NULL;
 936         } else
 937                 sp = NULL;
 938
 939         if (sp == NULL) {
 940                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 941                     ha->host_no));
 942                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 943
 944                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 945                 qla2xxx_wake_dpc(ha);
 946                 return;
 947         }
 948         cp = sp->cmd;
 949         if (cp == NULL) {
 950                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 951                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 952                 qla_printk(KERN_WARNING, ha,
 953                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 954
 955                 return;
 956         }
 957
 958         lscsi_status = scsi_status & STATUS_MASK;
 959         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 960         CMD_COMPL_STATUS(cp) = comp_status;
 961         CMD_SCSI_STATUS(cp) = scsi_status;
 962
 963         fcport = sp->fcport;
 964
 965         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 966         if (IS_FWI2_CAPABLE(ha)) {
 967                 sense_len = le32_to_cpu(sts24->sense_len);
 968                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 969                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 970                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 971                 rsp_info = sts24->data;
 972                 sense_data = sts24->data;
 973                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 974         } else {
 975                 sense_len = le16_to_cpu(sts->req_sense_length);
 976                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 977                 resid_len = le32_to_cpu(sts->residual_length);
 978                 rsp_info = sts->rsp_info;
 979                 sense_data = sts->req_sense_data;
 980         }
 981
 982         /* Check for any FCP transport errors. */
 983         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 984                 /* Sense data lies beyond any FCP RESPONSE data. */
 985                 if (IS_FWI2_CAPABLE(ha))
 986                         sense_data += rsp_info_len;
 987                 if (rsp_info_len > 3 && rsp_info[3]) {
 988                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 989                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 990                             "retrying command\n", ha->host_no,
 991                             cp->device->channel, cp->device->id,
 992                             cp->device->lun, rsp_info_len, rsp_info[0],
 993                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 994                             rsp_info[5], rsp_info[6], rsp_info[7]));
 995
 996                         cp->result = DID_BUS_BUSY << 16;
 997                         qla2x00_sp_compl(ha, sp);
 998                         return;
 999                 }
1000         }
1001
1002         /* Check for overrun. */
1003         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1004             scsi_status & SS_RESIDUAL_OVER)
1005                 comp_status = CS_DATA_OVERRUN;
1006
1007         /*
1008          * Based on Host and scsi status generate status code for Linux
1009          */
1010         switch (comp_status) {
1011         case CS_COMPLETE:
1012         case CS_QUEUE_FULL:
1013                 if (scsi_status == 0) {
1014                         cp->result = DID_OK << 16;
1015                         break;
1016                 }
1017                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1018                         resid = resid_len;
1019                         scsi_set_resid(cp, resid);
1020                         CMD_RESID_LEN(cp) = resid;
1021
1022                         if (!lscsi_status &&
1023                             ((unsigned)(scsi_bufflen(cp) - resid) <
1024                              cp->underflow)) {
1025                                 qla_printk(KERN_INFO, ha,
1026                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1027                                            "detected (%x of %x bytes)...returning "
1028                                            "error status.\n", ha->host_no,
1029                                            cp->device->channel, cp->device->id,
1030                                            cp->device->lun, resid,
1031                                            scsi_bufflen(cp));
1032
1033                                 cp->result = DID_ERROR << 16;
1034                                 break;
1035                         }
1036                 }
1037                 cp->result = DID_OK << 16 | lscsi_status;
1038
1039                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1040                         DEBUG2(printk(KERN_INFO
1041                             "scsi(%ld): QUEUE FULL status detected "
1042                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1043                             scsi_status));
1044
1045                         /* Adjust queue depth for all luns on the port. */
1046                         fcport->last_queue_full = jiffies;
1047                         starget_for_each_device(cp->device->sdev_target,
1048                             fcport, qla2x00_adjust_sdev_qdepth_down);
1049                         break;
1050                 }
1051                 if (lscsi_status != SS_CHECK_CONDITION)
1052                         break;
1053
1054                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1055                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1056                         break;
1057
1058                 qla2x00_handle_sense(sp, sense_data, sense_len);
1059                 break;
1060
1061         case CS_DATA_UNDERRUN:
1062                 resid = resid_len;
1063                 /* Use F/W calculated residual length. */
1064                 if (IS_FWI2_CAPABLE(ha)) {
1065                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1066                                 lscsi_status = 0;
1067                         } else if (resid != fw_resid_len) {
1068                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1069                                 lscsi_status = 0;
1070                         }
1071                         resid = fw_resid_len;
1072                 }
1073
1074                 if (scsi_status & SS_RESIDUAL_UNDER) {
1075                         scsi_set_resid(cp, resid);
1076                         CMD_RESID_LEN(cp) = resid;
1077                 } else {
1078                         DEBUG2(printk(KERN_INFO
1079                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1080                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1081                             "os_underflow=0x%x\n", ha->host_no,
1082                             cp->device->id, cp->device->lun, comp_status,
1083                             scsi_status, resid_len, resid, cp->cmnd[0],
1084                             cp->underflow));
1085
1086                 }
1087
1088                 /*
1089                  * Check to see if SCSI Status is non zero. If so report SCSI
1090                  * Status.
1091                  */
1092                 if (lscsi_status != 0) {
1093                         cp->result = DID_OK << 16 | lscsi_status;
1094
1095                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1096                                 DEBUG2(printk(KERN_INFO
1097                                     "scsi(%ld): QUEUE FULL status detected "
1098                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1099                                     scsi_status));
1100
1101                                 /*
1102                                  * Adjust queue depth for all luns on the
1103                                  * port.
1104                                  */
1105                                 fcport->last_queue_full = jiffies;
1106                                 starget_for_each_device(
1107                                     cp->device->sdev_target, fcport,
1108                                     qla2x00_adjust_sdev_qdepth_down);
1109                                 break;
1110                         }
1111                         if (lscsi_status != SS_CHECK_CONDITION)
1112                                 break;
1113
1114                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1115                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1116                                 break;
1117
1118                         qla2x00_handle_sense(sp, sense_data, sense_len);
1119                 } else {
1120                         /*
1121                          * If RISC reports underrun and target does not report
1122                          * it then we must have a lost frame, so tell upper
1123                          * layer to retry it by reporting a bus busy.
1124                          */
1125                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1126                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1127                                               "frame(s) detected (%x of %x bytes)..."
1128                                               "retrying command.\n", ha->host_no,
1129                                               cp->device->channel, cp->device->id,
1130                                               cp->device->lun, resid,
1131                                               scsi_bufflen(cp)));
1132
1133                                 cp->result = DID_BUS_BUSY << 16;
1134                                 break;
1135                         }
1136
1137                         /* Handle mid-layer underflow */
1138                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1139                             cp->underflow) {
1140                                 qla_printk(KERN_INFO, ha,
1141                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1142                                            "detected (%x of %x bytes)...returning "
1143                                            "error status.\n", ha->host_no,
1144                                            cp->device->channel, cp->device->id,
1145                                            cp->device->lun, resid,
1146                                            scsi_bufflen(cp));
1147
1148                                 cp->result = DID_ERROR << 16;
1149                                 break;
1150                         }
1151
1152                         /* Everybody online, looking good... */
1153                         cp->result = DID_OK << 16;
1154                 }
1155                 break;
1156
1157         case CS_DATA_OVERRUN:
1158                 DEBUG2(printk(KERN_INFO
1159                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1160                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1161                     scsi_status));
1162                 DEBUG2(printk(KERN_INFO
1163                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1164                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1165                     cp->cmnd[4], cp->cmnd[5]));
1166                 DEBUG2(printk(KERN_INFO
1167                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1168                     "status!\n",
1169                     cp->serial_number, scsi_bufflen(cp), resid_len));
1170
1171                 cp->result = DID_ERROR << 16;
1172                 break;
1173
1174         case CS_PORT_LOGGED_OUT:
1175         case CS_PORT_CONFIG_CHG:
1176         case CS_PORT_BUSY:
1177         case CS_INCOMPLETE:
1178         case CS_PORT_UNAVAILABLE:
1179                 /*
1180                  * If the port is in Target Down state, return all IOs for this
1181                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1182                  * retry_queue.
1183                  */
1184                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1185                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1186                     ha->host_no, cp->device->id, cp->device->lun,
1187                     cp->serial_number, comp_status,
1188                     atomic_read(&fcport->state)));
1189
1190                 cp->result = DID_BUS_BUSY << 16;
1191                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1192                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1193                 break;
1194
1195         case CS_RESET:
1196                 DEBUG2(printk(KERN_INFO
1197                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1198                     ha->host_no, comp_status, scsi_status));
1199
1200                 cp->result = DID_RESET << 16;
1201                 break;
1202
1203         case CS_ABORTED:
1204                 /*
1205                  * hv2.19.12 - DID_ABORT does not retry the request if we
1206                  * aborted this request then abort otherwise it must be a
1207                  * reset.
1208                  */
1209                 DEBUG2(printk(KERN_INFO
1210                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1211                     ha->host_no, comp_status, scsi_status));
1212
1213                 cp->result = DID_RESET << 16;
1214                 break;
1215
1216         case CS_TIMEOUT:
1217                 cp->result = DID_BUS_BUSY << 16;
1218
1219                 if (IS_FWI2_CAPABLE(ha)) {
1220                         DEBUG2(printk(KERN_INFO
1221                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1222                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1223                             cp->device->id, cp->device->lun, comp_status,
1224                             scsi_status));
1225                         break;
1226                 }
1227                 DEBUG2(printk(KERN_INFO
1228                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1229                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1230                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1231                     le16_to_cpu(sts->status_flags)));
1232
1233                 /* Check to see if logout occurred. */
1234                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1235                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1236                 break;
1237
1238         default:
1239                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1240                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1241                 qla_printk(KERN_INFO, ha,
1242                     "Unknown status detected 0x%x-0x%x.\n",
1243                     comp_status, scsi_status);
1244
1245                 cp->result = DID_ERROR << 16;
1246                 break;
1247         }
1248
1249         /* Place command on done queue. */
1250         if (ha->status_srb == NULL)
1251                 qla2x00_sp_compl(ha, sp);
1252 }
1253
1254 /**
1255  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1256  * @ha: SCSI driver HA context
1257  * @pkt: Entry pointer
1258  *
1259  * Extended sense data.
1260  */
1261 static void
1262 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1263 {
1264         uint8_t         sense_sz = 0;
1265         srb_t           *sp = ha->status_srb;
1266         struct scsi_cmnd *cp;
1267
1268         if (sp != NULL && sp->request_sense_length != 0) {
1269                 cp = sp->cmd;
1270                 if (cp == NULL) {
1271                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1272                             "sp=%p.\n", __func__, sp));
1273                         qla_printk(KERN_INFO, ha,
1274                             "cmd is NULL: already returned to OS (sp=%p)\n",
1275                             sp);
1276
1277                         ha->status_srb = NULL;
1278                         return;
1279                 }
1280
1281                 if (sp->request_sense_length > sizeof(pkt->data)) {
1282                         sense_sz = sizeof(pkt->data);
1283                 } else {
1284                         sense_sz = sp->request_sense_length;
1285                 }
1286
1287                 /* Move sense data. */
1288                 if (IS_FWI2_CAPABLE(ha))
1289                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1290                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1291                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1292
1293                 sp->request_sense_ptr += sense_sz;
1294                 sp->request_sense_length -= sense_sz;
1295
1296                 /* Place command on done queue. */
1297                 if (sp->request_sense_length == 0) {
1298                         ha->status_srb = NULL;
1299                         qla2x00_sp_compl(ha, sp);
1300                 }
1301         }
1302 }
1303
1304 /**
1305  * qla2x00_error_entry() - Process an error entry.
1306  * @ha: SCSI driver HA context
1307  * @pkt: Entry pointer
1308  */
1309 static void
1310 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1311 {
1312         srb_t *sp;
1313
1314 #if defined(QL_DEBUG_LEVEL_2)
1315         if (pkt->entry_status & RF_INV_E_ORDER)
1316                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1317         else if (pkt->entry_status & RF_INV_E_COUNT)
1318                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1319         else if (pkt->entry_status & RF_INV_E_PARAM)
1320                 qla_printk(KERN_ERR, ha,
1321                     "%s: Invalid Entry Parameter\n", __func__);
1322         else if (pkt->entry_status & RF_INV_E_TYPE)
1323                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1324         else if (pkt->entry_status & RF_BUSY)
1325                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1326         else
1327                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1328 #endif
1329
1330         /* Validate handle. */
1331         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1332                 sp = ha->outstanding_cmds[pkt->handle];
1333         else
1334                 sp = NULL;
1335
1336         if (sp) {
1337                 /* Free outstanding command slot. */
1338                 ha->outstanding_cmds[pkt->handle] = NULL;
1339
1340                 /* Bad payload or header */
1341                 if (pkt->entry_status &
1342                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1343                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1344                         sp->cmd->result = DID_ERROR << 16;
1345                 } else if (pkt->entry_status & RF_BUSY) {
1346                         sp->cmd->result = DID_BUS_BUSY << 16;
1347                 } else {
1348                         sp->cmd->result = DID_ERROR << 16;
1349                 }
1350                 qla2x00_sp_compl(ha, sp);
1351
1352         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1353             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1354                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1355                     ha->host_no));
1356                 qla_printk(KERN_WARNING, ha,
1357                     "Error entry - invalid handle\n");
1358
1359                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1360                 qla2xxx_wake_dpc(ha);
1361         }
1362 }
1363
1364 /**
1365  * qla24xx_mbx_completion() - Process mailbox command completions.
1366  * @ha: SCSI driver HA context
1367  * @mb0: Mailbox0 register
1368  */
1369 static void
1370 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1371 {
1372         uint16_t        cnt;
1373         uint16_t __iomem *wptr;
1374         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1375
1376         /* Load return mailbox registers. */
1377         ha->flags.mbox_int = 1;
1378         ha->mailbox_out[0] = mb0;
1379         wptr = (uint16_t __iomem *)&reg->mailbox1;
1380
1381         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1382                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1383                 wptr++;
1384         }
1385
1386         if (ha->mcp) {
1387                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1388                     __func__, ha->host_no, ha->mcp->mb[0]));
1389         } else {
1390                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1391                     __func__, ha->host_no));
1392         }
1393 }
1394
1395 /**
1396  * qla24xx_process_response_queue() - Process response queue entries.
1397  * @ha: SCSI driver HA context
1398  */
1399 void
1400 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1401 {
1402         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1403         struct sts_entry_24xx *pkt;
1404
1405         if (!ha->flags.online)
1406                 return;
1407
1408         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1409                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1410
1411                 ha->rsp_ring_index++;
1412                 if (ha->rsp_ring_index == ha->response_q_length) {
1413                         ha->rsp_ring_index = 0;
1414                         ha->response_ring_ptr = ha->response_ring;
1415                 } else {
1416                         ha->response_ring_ptr++;
1417                 }
1418
1419                 if (pkt->entry_status != 0) {
1420                         DEBUG3(printk(KERN_INFO
1421                             "scsi(%ld): Process error entry.\n", ha->host_no));
1422
1423                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1424                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1425                         wmb();
1426                         continue;
1427                 }
1428
1429                 switch (pkt->entry_type) {
1430                 case STATUS_TYPE:
1431                         qla2x00_status_entry(ha, pkt);
1432                         break;
1433                 case STATUS_CONT_TYPE:
1434                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1435                         break;
1436                 case VP_RPT_ID_IOCB_TYPE:
1437                         qla24xx_report_id_acquisition(ha,
1438                             (struct vp_rpt_id_entry_24xx *)pkt);
1439                         break;
1440                 default:
1441                         /* Type Not Supported. */
1442                         DEBUG4(printk(KERN_WARNING
1443                             "scsi(%ld): Received unknown response pkt type %x "
1444                             "entry status=%x.\n",
1445                             ha->host_no, pkt->entry_type, pkt->entry_status));
1446                         break;
1447                 }
1448                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1449                 wmb();
1450         }
1451
1452         /* Adjust ring index */
1453         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1454 }
1455
1456 static void
1457 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1458 {
1459         int rval;
1460         uint32_t cnt;
1461         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1462
1463         if (!IS_QLA25XX(ha))
1464                 return;
1465
1466         rval = QLA_SUCCESS;
1467         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1468         RD_REG_DWORD(&reg->iobase_addr);
1469         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1470         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1471             rval == QLA_SUCCESS; cnt--) {
1472                 if (cnt) {
1473                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1474                         udelay(10);
1475                 } else
1476                         rval = QLA_FUNCTION_TIMEOUT;
1477         }
1478         if (rval == QLA_SUCCESS)
1479                 goto next_test;
1480
1481         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1482         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1483             rval == QLA_SUCCESS; cnt--) {
1484                 if (cnt) {
1485                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1486                         udelay(10);
1487                 } else
1488                         rval = QLA_FUNCTION_TIMEOUT;
1489         }
1490         if (rval != QLA_SUCCESS)
1491                 goto done;
1492
1493 next_test:
1494         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1495                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1496
1497 done:
1498         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1499         RD_REG_DWORD(&reg->iobase_window);
1500 }
1501
1502 /**
1503  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1504  * @irq:
1505  * @dev_id: SCSI driver HA context
1506  *
1507  * Called by system whenever the host adapter generates an interrupt.
1508  *
1509  * Returns handled flag.
1510  */
1511 irqreturn_t
1512 qla24xx_intr_handler(int irq, void *dev_id)
1513 {
1514         scsi_qla_host_t *ha;
1515         struct device_reg_24xx __iomem *reg;
1516         int             status;
1517         unsigned long   iter;
1518         uint32_t        stat;
1519         uint32_t        hccr;
1520         uint16_t        mb[4];
1521
1522         ha = (scsi_qla_host_t *) dev_id;
1523         if (!ha) {
1524                 printk(KERN_INFO
1525                     "%s(): NULL host pointer\n", __func__);
1526                 return IRQ_NONE;
1527         }
1528
1529         reg = &ha->iobase->isp24;
1530         status = 0;
1531
1532         spin_lock(&ha->hardware_lock);
1533         for (iter = 50; iter--; ) {
1534                 stat = RD_REG_DWORD(&reg->host_status);
1535                 if (stat & HSRX_RISC_PAUSED) {
1536                         if (pci_channel_offline(ha->pdev))
1537                                 break;
1538
1539                         if (ha->hw_event_pause_errors == 0)
1540                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1541                                     0, MSW(stat), LSW(stat));
1542                         else if (ha->hw_event_pause_errors < 0xffffffff)
1543                                 ha->hw_event_pause_errors++;
1544
1545                         hccr = RD_REG_DWORD(&reg->hccr);
1546
1547                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1548                             "Dumping firmware!\n", hccr);
1549
1550                         qla2xxx_check_risc_status(ha);
1551
1552                         ha->isp_ops->fw_dump(ha, 1);
1553                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1554                         break;
1555                 } else if ((stat & HSRX_RISC_INT) == 0)
1556                         break;
1557
1558                 switch (stat & 0xff) {
1559                 case 0x1:
1560                 case 0x2:
1561                 case 0x10:
1562                 case 0x11:
1563                         qla24xx_mbx_completion(ha, MSW(stat));
1564                         status |= MBX_INTERRUPT;
1565
1566                         break;
1567                 case 0x12:
1568                         mb[0] = MSW(stat);
1569                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1570                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1571                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1572                         qla2x00_async_event(ha, mb);
1573                         break;
1574                 case 0x13:
1575                         qla24xx_process_response_queue(ha);
1576                         break;
1577                 default:
1578                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1579                             "(%d).\n",
1580                             ha->host_no, stat & 0xff));
1581                         break;
1582                 }
1583                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1584                 RD_REG_DWORD_RELAXED(&reg->hccr);
1585         }
1586         spin_unlock(&ha->hardware_lock);
1587
1588         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1589             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1590                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1591                 complete(&ha->mbx_intr_comp);
1592         }
1593
1594         return IRQ_HANDLED;
1595 }
1596
1597 static irqreturn_t
1598 qla24xx_msix_rsp_q(int irq, void *dev_id)
1599 {
1600         scsi_qla_host_t *ha;
1601         struct device_reg_24xx __iomem *reg;
1602
1603         ha = dev_id;
1604         reg = &ha->iobase->isp24;
1605
1606         spin_lock_irq(&ha->hardware_lock);
1607
1608         qla24xx_process_response_queue(ha);
1609         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1610
1611         spin_unlock_irq(&ha->hardware_lock);
1612
1613         return IRQ_HANDLED;
1614 }
1615
1616 static irqreturn_t
1617 qla24xx_msix_default(int irq, void *dev_id)
1618 {
1619         scsi_qla_host_t *ha;
1620         struct device_reg_24xx __iomem *reg;
1621         int             status;
1622         uint32_t        stat;
1623         uint32_t        hccr;
1624         uint16_t        mb[4];
1625
1626         ha = dev_id;
1627         reg = &ha->iobase->isp24;
1628         status = 0;
1629
1630         spin_lock_irq(&ha->hardware_lock);
1631         do {
1632                 stat = RD_REG_DWORD(&reg->host_status);
1633                 if (stat & HSRX_RISC_PAUSED) {
1634                         if (pci_channel_offline(ha->pdev))
1635                                 break;
1636
1637                         if (ha->hw_event_pause_errors == 0)
1638                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1639                                     0, MSW(stat), LSW(stat));
1640                         else if (ha->hw_event_pause_errors < 0xffffffff)
1641                                 ha->hw_event_pause_errors++;
1642
1643                         hccr = RD_REG_DWORD(&reg->hccr);
1644
1645                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1646                             "Dumping firmware!\n", hccr);
1647
1648                         qla2xxx_check_risc_status(ha);
1649
1650                         ha->isp_ops->fw_dump(ha, 1);
1651                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1652                         break;
1653                 } else if ((stat & HSRX_RISC_INT) == 0)
1654                         break;
1655
1656                 switch (stat & 0xff) {
1657                 case 0x1:
1658                 case 0x2:
1659                 case 0x10:
1660                 case 0x11:
1661                         qla24xx_mbx_completion(ha, MSW(stat));
1662                         status |= MBX_INTERRUPT;
1663
1664                         break;
1665                 case 0x12:
1666                         mb[0] = MSW(stat);
1667                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1668                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1669                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1670                         qla2x00_async_event(ha, mb);
1671                         break;
1672                 case 0x13:
1673                         qla24xx_process_response_queue(ha);
1674                         break;
1675                 default:
1676                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1677                             "(%d).\n",
1678                             ha->host_no, stat & 0xff));
1679                         break;
1680                 }
1681                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1682         } while (0);
1683         spin_unlock_irq(&ha->hardware_lock);
1684
1685         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1686             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1687                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1688                 complete(&ha->mbx_intr_comp);
1689         }
1690
1691         return IRQ_HANDLED;
1692 }
1693
1694 /* Interrupt handling helpers. */
1695
1696 struct qla_init_msix_entry {
1697         uint16_t entry;
1698         uint16_t index;
1699         const char *name;
1700         irq_handler_t handler;
1701 };
1702
1703 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1704         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1705                 "qla2xxx (default)", qla24xx_msix_default },
1706
1707         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1708                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1709 };
1710
1711 static void
1712 qla24xx_disable_msix(scsi_qla_host_t *ha)
1713 {
1714         int i;
1715         struct qla_msix_entry *qentry;
1716
1717         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1718                 qentry = &ha->msix_entries[imsix_entries[i].index];
1719                 if (qentry->have_irq)
1720                         free_irq(qentry->msix_vector, ha);
1721         }
1722         pci_disable_msix(ha->pdev);
1723 }
1724
1725 static int
1726 qla24xx_enable_msix(scsi_qla_host_t *ha)
1727 {
1728         int i, ret;
1729         struct msix_entry entries[QLA_MSIX_ENTRIES];
1730         struct qla_msix_entry *qentry;
1731
1732         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1733                 entries[i].entry = imsix_entries[i].entry;
1734
1735         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1736         if (ret) {
1737                 qla_printk(KERN_WARNING, ha,
1738                     "MSI-X: Failed to enable support -- %d/%d\n",
1739                     QLA_MSIX_ENTRIES, ret);
1740                 goto msix_out;
1741         }
1742         ha->flags.msix_enabled = 1;
1743
1744         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1745                 qentry = &ha->msix_entries[imsix_entries[i].index];
1746                 qentry->msix_vector = entries[i].vector;
1747                 qentry->msix_entry = entries[i].entry;
1748                 qentry->have_irq = 0;
1749                 ret = request_irq(qentry->msix_vector,
1750                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1751                 if (ret) {
1752                         qla_printk(KERN_WARNING, ha,
1753                             "MSI-X: Unable to register handler -- %x/%d.\n",
1754                             imsix_entries[i].index, ret);
1755                         qla24xx_disable_msix(ha);
1756                         goto msix_out;
1757                 }
1758                 qentry->have_irq = 1;
1759         }
1760
1761 msix_out:
1762         return ret;
1763 }
1764
1765 int
1766 qla2x00_request_irqs(scsi_qla_host_t *ha)
1767 {
1768         int ret;
1769         device_reg_t __iomem *reg = ha->iobase;
1770
1771         /* If possible, enable MSI-X. */
1772         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1773                 goto skip_msix;
1774
1775         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1776             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1777                 DEBUG2(qla_printk(KERN_WARNING, ha,
1778                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1779                     ha->chip_revision, ha->fw_attributes));
1780
1781                 goto skip_msix;
1782         }
1783
1784         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1785             (ha->pdev->subsystem_device == 0x7040 ||
1786                 ha->pdev->subsystem_device == 0x7041 ||
1787                 ha->pdev->subsystem_device == 0x1705)) {
1788                 DEBUG2(qla_printk(KERN_WARNING, ha,
1789                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1790                     ha->pdev->subsystem_vendor,
1791                     ha->pdev->subsystem_device));
1792
1793                 goto skip_msi;
1794         }
1795
1796         ret = qla24xx_enable_msix(ha);
1797         if (!ret) {
1798                 DEBUG2(qla_printk(KERN_INFO, ha,
1799                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1800                     ha->fw_attributes));
1801                 goto clear_risc_ints;
1802         }
1803         qla_printk(KERN_WARNING, ha,
1804             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1805 skip_msix:
1806
1807         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1808                 goto skip_msi;
1809
1810         ret = pci_enable_msi(ha->pdev);
1811         if (!ret) {
1812                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1813                 ha->flags.msi_enabled = 1;
1814         }
1815 skip_msi:
1816
1817         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1818             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1819         if (ret) {
1820                 qla_printk(KERN_WARNING, ha,
1821                     "Failed to reserve interrupt %d already in use.\n",
1822                     ha->pdev->irq);
1823                 goto fail;
1824         }
1825         ha->flags.inta_enabled = 1;
1826         ha->host->irq = ha->pdev->irq;
1827 clear_risc_ints:
1828
1829         ha->isp_ops->disable_intrs(ha);
1830         spin_lock_irq(&ha->hardware_lock);
1831         if (IS_FWI2_CAPABLE(ha)) {
1832                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1833                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1834         } else {
1835                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1836                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1837                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1838         }
1839         spin_unlock_irq(&ha->hardware_lock);
1840
1841 fail:
1842         return ret;
1843 }
1844
1845 void
1846 qla2x00_free_irqs(scsi_qla_host_t *ha)
1847 {
1848
1849         if (ha->flags.msix_enabled)
1850                 qla24xx_disable_msix(ha);
1851         else if (ha->flags.inta_enabled) {
1852                 free_irq(ha->host->irq, ha);
1853                 pci_disable_msi(ha->pdev);
1854         }
1855 }