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   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
 275         /* Setup to process RIO completion. */
 276         handle_cnt = 0;
 277         switch (mb[0]) {
 278         case MBA_SCSI_COMPLETION:
 279                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 280                 handle_cnt = 1;
 281                 break;
 282         case MBA_CMPLT_1_16BIT:
 283                 handles[0] = mb[1];
 284                 handle_cnt = 1;
 285                 mb[0] = MBA_SCSI_COMPLETION;
 286                 break;
 287         case MBA_CMPLT_2_16BIT:
 288                 handles[0] = mb[1];
 289                 handles[1] = mb[2];
 290                 handle_cnt = 2;
 291                 mb[0] = MBA_SCSI_COMPLETION;
 292                 break;
 293         case MBA_CMPLT_3_16BIT:
 294                 handles[0] = mb[1];
 295                 handles[1] = mb[2];
 296                 handles[2] = mb[3];
 297                 handle_cnt = 3;
 298                 mb[0] = MBA_SCSI_COMPLETION;
 299                 break;
 300         case MBA_CMPLT_4_16BIT:
 301                 handles[0] = mb[1];
 302                 handles[1] = mb[2];
 303                 handles[2] = mb[3];
 304                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 305                 handle_cnt = 4;
 306                 mb[0] = MBA_SCSI_COMPLETION;
 307                 break;
 308         case MBA_CMPLT_5_16BIT:
 309                 handles[0] = mb[1];
 310                 handles[1] = mb[2];
 311                 handles[2] = mb[3];
 312                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 313                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 314                 handle_cnt = 5;
 315                 mb[0] = MBA_SCSI_COMPLETION;
 316                 break;
 317         case MBA_CMPLT_2_32BIT:
 318                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 319                 handles[1] = le32_to_cpu(
 320                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 321                     RD_MAILBOX_REG(ha, reg, 6));
 322                 handle_cnt = 2;
 323                 mb[0] = MBA_SCSI_COMPLETION;
 324                 break;
 325         default:
 326                 break;
 327         }
 328
 329         switch (mb[0]) {
 330         case MBA_SCSI_COMPLETION:       /* Fast Post */
 331                 if (!ha->flags.online)
 332                         break;
 333
 334                 for (cnt = 0; cnt < handle_cnt; cnt++)
 335                         qla2x00_process_completed_request(ha, handles[cnt]);
 336                 break;
 337
 338         case MBA_RESET:                 /* Reset */
 339                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 340
 341                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 342                 break;
 343
 344         case MBA_SYSTEM_ERR:            /* System Error */
 345                 qla_printk(KERN_INFO, ha,
 346                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 347                     mb[1], mb[2], mb[3]);
 348
 349                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 350                 ha->isp_ops->fw_dump(ha, 1);
 351
 352                 if (IS_FWI2_CAPABLE(ha)) {
 353                         if (mb[1] == 0 && mb[2] == 0) {
 354                                 qla_printk(KERN_ERR, ha,
 355                                     "Unrecoverable Hardware Error: adapter "
 356                                     "marked OFFLINE!\n");
 357                                 ha->flags.online = 0;
 358                         } else
 359                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 360                 } else if (mb[1] == 0) {
 361                         qla_printk(KERN_INFO, ha,
 362                             "Unrecoverable Hardware Error: adapter marked "
 363                             "OFFLINE!\n");
 364                         ha->flags.online = 0;
 365                 } else
 366                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 367                 break;
 368
 369         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 370                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 371                     ha->host_no));
 372                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 373
 374                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 375                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 376                 break;
 377
 378         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 379                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 380                     ha->host_no));
 381                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 382
 383                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 384                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 385                 break;
 386
 387         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 388                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 389                     ha->host_no));
 390                 break;
 391
 392         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 393                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 394                     mb[1]));
 395                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 396
 397                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 398                         atomic_set(&ha->loop_state, LOOP_DOWN);
 399                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 400                         qla2x00_mark_all_devices_lost(ha, 1);
 401                 }
 402
 403                 if (ha->parent) {
 404                         atomic_set(&ha->vp_state, VP_FAILED);
 405                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 406                 }
 407
 408                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 409
 410                 ha->flags.management_server_logged_in = 0;
 411                 qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
 412                 break;
 413
 414         case MBA_LOOP_UP:               /* Loop Up Event */
 415                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 416                         link_speed = link_speeds[0];
 417                         ha->link_data_rate = PORT_SPEED_1GB;
 418                 } else {
 419                         link_speed = link_speeds[LS_UNKNOWN];
 420                         if (mb[1] < 5)
 421                                 link_speed = link_speeds[mb[1]];
 422                         ha->link_data_rate = mb[1];
 423                 }
 424
 425                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 426                     ha->host_no, link_speed));
 427                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 428                     link_speed);
 429
 430                 ha->flags.management_server_logged_in = 0;
 431                 qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
 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                 qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
 456                 break;
 457
 458         case MBA_LIP_RESET:             /* LIP reset occurred */
 459                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 460                     ha->host_no, mb[1]));
 461                 qla_printk(KERN_INFO, ha,
 462                     "LIP reset occured (%x).\n", mb[1]);
 463
 464                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 465                         atomic_set(&ha->loop_state, LOOP_DOWN);
 466                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 467                         qla2x00_mark_all_devices_lost(ha, 1);
 468                 }
 469
 470                 if (ha->parent) {
 471                         atomic_set(&ha->vp_state, VP_FAILED);
 472                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 473                 }
 474
 475                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 476
 477                 ha->operating_mode = LOOP;
 478                 ha->flags.management_server_logged_in = 0;
 479                 qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
 480                 break;
 481
 482         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 483                 if (IS_QLA2100(ha))
 484                         break;
 485
 486                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 487                     ha->host_no));
 488
 489                 /*
 490                  * Until there's a transition from loop down to loop up, treat
 491                  * this as loop down only.
 492                  */
 493                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 494                         atomic_set(&ha->loop_state, LOOP_DOWN);
 495                         if (!atomic_read(&ha->loop_down_timer))
 496                                 atomic_set(&ha->loop_down_timer,
 497                                     LOOP_DOWN_TIME);
 498                         qla2x00_mark_all_devices_lost(ha, 1);
 499                 }
 500
 501                 if (ha->parent) {
 502                         atomic_set(&ha->vp_state, VP_FAILED);
 503                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 504                 }
 505
 506                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 507                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 508                 }
 509                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 510
 511                 ha->flags.gpsc_supported = 1;
 512                 ha->flags.management_server_logged_in = 0;
 513                 break;
 514
 515         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 516                 if (IS_QLA2100(ha))
 517                         break;
 518
 519                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 520                     "received.\n",
 521                     ha->host_no));
 522                 qla_printk(KERN_INFO, ha,
 523                     "Configuration change detected: value=%x.\n", mb[1]);
 524
 525                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 526                         atomic_set(&ha->loop_state, LOOP_DOWN);
 527                         if (!atomic_read(&ha->loop_down_timer))
 528                                 atomic_set(&ha->loop_down_timer,
 529                                     LOOP_DOWN_TIME);
 530                         qla2x00_mark_all_devices_lost(ha, 1);
 531                 }
 532
 533                 if (ha->parent) {
 534                         atomic_set(&ha->vp_state, VP_FAILED);
 535                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 536                 }
 537
 538                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 539                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 540                 break;
 541
 542         case MBA_PORT_UPDATE:           /* Port database update */
 543                 /*
 544                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 545                  * event etc. earlier indicating loop is down) then process
 546                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 547                  */
 548                 atomic_set(&ha->loop_down_timer, 0);
 549                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 550                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 551                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 552                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 553                             mb[2], mb[3]));
 554                         break;
 555                 }
 556
 557                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 558                     ha->host_no));
 559                 DEBUG(printk(KERN_INFO
 560                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 561                     ha->host_no, mb[1], mb[2], mb[3]));
 562
 563                 /*
 564                  * Mark all devices as missing so we will login again.
 565                  */
 566                 atomic_set(&ha->loop_state, LOOP_UP);
 567
 568                 qla2x00_mark_all_devices_lost(ha, 1);
 569
 570                 ha->flags.rscn_queue_overflow = 1;
 571
 572                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 573                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 574                 break;
 575
 576         case MBA_RSCN_UPDATE:           /* State Change Registration */
 577                 /* Check if the Vport has issued a SCR */
 578                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 579                         break;
 580                 /* Only handle SCNs for our Vport index. */
 581                 if (ha->flags.npiv_supported && ha->vp_idx != mb[3])
 582                         break;
 583
 584                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 585                     ha->host_no));
 586                 DEBUG(printk(KERN_INFO
 587                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 588                     ha->host_no, mb[1], mb[2], mb[3]));
 589
 590                 rscn_entry = (mb[1] << 16) | mb[2];
 591                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 592                     ha->d_id.b.al_pa;
 593                 if (rscn_entry == host_pid) {
 594                         DEBUG(printk(KERN_INFO
 595                             "scsi(%ld): Ignoring RSCN update to local host "
 596                             "port ID (%06x)\n",
 597                             ha->host_no, host_pid));
 598                         break;
 599                 }
 600
 601                 rscn_queue_index = ha->rscn_in_ptr + 1;
 602                 if (rscn_queue_index == MAX_RSCN_COUNT)
 603                         rscn_queue_index = 0;
 604                 if (rscn_queue_index != ha->rscn_out_ptr) {
 605                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 606                         ha->rscn_in_ptr = rscn_queue_index;
 607                 } else {
 608                         ha->flags.rscn_queue_overflow = 1;
 609                 }
 610
 611                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 612                 atomic_set(&ha->loop_down_timer, 0);
 613                 ha->flags.management_server_logged_in = 0;
 614
 615                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 616                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 617                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
 618                 break;
 619
 620         /* case MBA_RIO_RESPONSE: */
 621         case MBA_ZIO_RESPONSE:
 622                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 623                     ha->host_no));
 624                 DEBUG(printk(KERN_INFO
 625                     "scsi(%ld): [R|Z]IO update completion.\n",
 626                     ha->host_no));
 627
 628                 if (IS_FWI2_CAPABLE(ha))
 629                         qla24xx_process_response_queue(ha);
 630                 else
 631                         qla2x00_process_response_queue(ha);
 632                 break;
 633
 634         case MBA_DISCARD_RND_FRAME:
 635                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 636                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 637                 break;
 638
 639         case MBA_TRACE_NOTIFICATION:
 640                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 641                 ha->host_no, mb[1], mb[2]));
 642                 break;
 643         }
 644
 645         if (!ha->parent && ha->num_vhosts)
 646                 qla2x00_alert_all_vps(ha, mb);
 647 }
 648
 649 static void
 650 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 651 {
 652         fc_port_t *fcport = data;
 653
 654         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 655                 return;
 656
 657         if (sdev->ordered_tags)
 658                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 659                     sdev->queue_depth + 1);
 660         else
 661                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 662                     sdev->queue_depth + 1);
 663
 664         fcport->last_ramp_up = jiffies;
 665
 666         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 667             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 668             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 669             sdev->queue_depth));
 670 }
 671
 672 static void
 673 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 674 {
 675         fc_port_t *fcport = data;
 676
 677         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 678                 return;
 679
 680         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 681             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 682             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 683             sdev->queue_depth));
 684 }
 685
 686 static inline void
 687 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 688 {
 689         fc_port_t *fcport;
 690         struct scsi_device *sdev;
 691
 692         sdev = sp->cmd->device;
 693         if (sdev->queue_depth >= ha->max_q_depth)
 694                 return;
 695
 696         fcport = sp->fcport;
 697         if (time_before(jiffies,
 698             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 699                 return;
 700         if (time_before(jiffies,
 701             fcport->last_queue_full + ql2xqfullrampup * HZ))
 702                 return;
 703
 704         starget_for_each_device(sdev->sdev_target, fcport,
 705             qla2x00_adjust_sdev_qdepth_up);
 706 }
 707
 708 /**
 709  * qla2x00_process_completed_request() - Process a Fast Post response.
 710  * @ha: SCSI driver HA context
 711  * @index: SRB index
 712  */
 713 static void
 714 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 715 {
 716         srb_t *sp;
 717
 718         /* Validate handle. */
 719         if (index >= MAX_OUTSTANDING_COMMANDS) {
 720                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 721                     ha->host_no, index));
 722                 qla_printk(KERN_WARNING, ha,
 723                     "Invalid SCSI completion handle %d.\n", index);
 724
 725                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 726                 return;
 727         }
 728
 729         sp = ha->outstanding_cmds[index];
 730         if (sp) {
 731                 /* Free outstanding command slot. */
 732                 ha->outstanding_cmds[index] = NULL;
 733
 734                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 735                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 736
 737                 /* Save ISP completion status */
 738                 sp->cmd->result = DID_OK << 16;
 739
 740                 qla2x00_ramp_up_queue_depth(ha, sp);
 741                 qla2x00_sp_compl(ha, sp);
 742         } else {
 743                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 744                     ha->host_no));
 745                 qla_printk(KERN_WARNING, ha,
 746                     "Invalid ISP SCSI completion handle\n");
 747
 748                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 749         }
 750 }
 751
 752 /**
 753  * qla2x00_process_response_queue() - Process response queue entries.
 754  * @ha: SCSI driver HA context
 755  */
 756 void
 757 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 758 {
 759         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 760         sts_entry_t     *pkt;
 761         uint16_t        handle_cnt;
 762         uint16_t        cnt;
 763
 764         if (!ha->flags.online)
 765                 return;
 766
 767         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 768                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 769
 770                 ha->rsp_ring_index++;
 771                 if (ha->rsp_ring_index == ha->response_q_length) {
 772                         ha->rsp_ring_index = 0;
 773                         ha->response_ring_ptr = ha->response_ring;
 774                 } else {
 775                         ha->response_ring_ptr++;
 776                 }
 777
 778                 if (pkt->entry_status != 0) {
 779                         DEBUG3(printk(KERN_INFO
 780                             "scsi(%ld): Process error entry.\n", ha->host_no));
 781
 782                         qla2x00_error_entry(ha, pkt);
 783                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 784                         wmb();
 785                         continue;
 786                 }
 787
 788                 switch (pkt->entry_type) {
 789                 case STATUS_TYPE:
 790                         qla2x00_status_entry(ha, pkt);
 791                         break;
 792                 case STATUS_TYPE_21:
 793                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 794                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 795                                 qla2x00_process_completed_request(ha,
 796                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 797                         }
 798                         break;
 799                 case STATUS_TYPE_22:
 800                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 801                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 802                                 qla2x00_process_completed_request(ha,
 803                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 804                         }
 805                         break;
 806                 case STATUS_CONT_TYPE:
 807                         qla2x00_status_cont_entry(ha, (sts_cont_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  * qla24xx_mbx_completion() - Process mailbox command completions.
1344  * @ha: SCSI driver HA context
1345  * @mb0: Mailbox0 register
1346  */
1347 static void
1348 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1349 {
1350         uint16_t        cnt;
1351         uint16_t __iomem *wptr;
1352         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1353
1354         /* Load return mailbox registers. */
1355         ha->flags.mbox_int = 1;
1356         ha->mailbox_out[0] = mb0;
1357         wptr = (uint16_t __iomem *)&reg->mailbox1;
1358
1359         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1360                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1361                 wptr++;
1362         }
1363
1364         if (ha->mcp) {
1365                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1366                     __func__, ha->host_no, ha->mcp->mb[0]));
1367         } else {
1368                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1369                     __func__, ha->host_no));
1370         }
1371 }
1372
1373 /**
1374  * qla24xx_process_response_queue() - Process response queue entries.
1375  * @ha: SCSI driver HA context
1376  */
1377 void
1378 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1379 {
1380         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1381         struct sts_entry_24xx *pkt;
1382
1383         if (!ha->flags.online)
1384                 return;
1385
1386         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1387                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1388
1389                 ha->rsp_ring_index++;
1390                 if (ha->rsp_ring_index == ha->response_q_length) {
1391                         ha->rsp_ring_index = 0;
1392                         ha->response_ring_ptr = ha->response_ring;
1393                 } else {
1394                         ha->response_ring_ptr++;
1395                 }
1396
1397                 if (pkt->entry_status != 0) {
1398                         DEBUG3(printk(KERN_INFO
1399                             "scsi(%ld): Process error entry.\n", ha->host_no));
1400
1401                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1402                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1403                         wmb();
1404                         continue;
1405                 }
1406
1407                 switch (pkt->entry_type) {
1408                 case STATUS_TYPE:
1409                         qla2x00_status_entry(ha, pkt);
1410                         break;
1411                 case STATUS_CONT_TYPE:
1412                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1413                         break;
1414                 case VP_RPT_ID_IOCB_TYPE:
1415                         qla24xx_report_id_acquisition(ha,
1416                             (struct vp_rpt_id_entry_24xx *)pkt);
1417                         break;
1418                 default:
1419                         /* Type Not Supported. */
1420                         DEBUG4(printk(KERN_WARNING
1421                             "scsi(%ld): Received unknown response pkt type %x "
1422                             "entry status=%x.\n",
1423                             ha->host_no, pkt->entry_type, pkt->entry_status));
1424                         break;
1425                 }
1426                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1427                 wmb();
1428         }
1429
1430         /* Adjust ring index */
1431         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1432 }
1433
1434 static void
1435 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1436 {
1437         int rval;
1438         uint32_t cnt;
1439         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1440
1441         if (!IS_QLA25XX(ha))
1442                 return;
1443
1444         rval = QLA_SUCCESS;
1445         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1446         RD_REG_DWORD(&reg->iobase_addr);
1447         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1448         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1449             rval == QLA_SUCCESS; cnt--) {
1450                 if (cnt) {
1451                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1452                         udelay(10);
1453                 } else
1454                         rval = QLA_FUNCTION_TIMEOUT;
1455         }
1456         if (rval == QLA_SUCCESS)
1457                 goto next_test;
1458
1459         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1460         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1461             rval == QLA_SUCCESS; cnt--) {
1462                 if (cnt) {
1463                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1464                         udelay(10);
1465                 } else
1466                         rval = QLA_FUNCTION_TIMEOUT;
1467         }
1468         if (rval != QLA_SUCCESS)
1469                 goto done;
1470
1471 next_test:
1472         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1473                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1474
1475 done:
1476         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1477         RD_REG_DWORD(&reg->iobase_window);
1478 }
1479
1480 /**
1481  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1482  * @irq:
1483  * @dev_id: SCSI driver HA context
1484  *
1485  * Called by system whenever the host adapter generates an interrupt.
1486  *
1487  * Returns handled flag.
1488  */
1489 irqreturn_t
1490 qla24xx_intr_handler(int irq, void *dev_id)
1491 {
1492         scsi_qla_host_t *ha;
1493         struct device_reg_24xx __iomem *reg;
1494         int             status;
1495         unsigned long   iter;
1496         uint32_t        stat;
1497         uint32_t        hccr;
1498         uint16_t        mb[4];
1499
1500         ha = (scsi_qla_host_t *) dev_id;
1501         if (!ha) {
1502                 printk(KERN_INFO
1503                     "%s(): NULL host pointer\n", __func__);
1504                 return IRQ_NONE;
1505         }
1506
1507         reg = &ha->iobase->isp24;
1508         status = 0;
1509
1510         spin_lock(&ha->hardware_lock);
1511         for (iter = 50; iter--; ) {
1512                 stat = RD_REG_DWORD(&reg->host_status);
1513                 if (stat & HSRX_RISC_PAUSED) {
1514                         if (pci_channel_offline(ha->pdev))
1515                                 break;
1516
1517                         if (ha->hw_event_pause_errors == 0)
1518                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1519                                     0, MSW(stat), LSW(stat));
1520                         else if (ha->hw_event_pause_errors < 0xffffffff)
1521                                 ha->hw_event_pause_errors++;
1522
1523                         hccr = RD_REG_DWORD(&reg->hccr);
1524
1525                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1526                             "Dumping firmware!\n", hccr);
1527
1528                         qla2xxx_check_risc_status(ha);
1529
1530                         ha->isp_ops->fw_dump(ha, 1);
1531                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1532                         break;
1533                 } else if ((stat & HSRX_RISC_INT) == 0)
1534                         break;
1535
1536                 switch (stat & 0xff) {
1537                 case 0x1:
1538                 case 0x2:
1539                 case 0x10:
1540                 case 0x11:
1541                         qla24xx_mbx_completion(ha, MSW(stat));
1542                         status |= MBX_INTERRUPT;
1543
1544                         break;
1545                 case 0x12:
1546                         mb[0] = MSW(stat);
1547                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1548                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1549                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1550                         qla2x00_async_event(ha, mb);
1551                         break;
1552                 case 0x13:
1553                         qla24xx_process_response_queue(ha);
1554                         break;
1555                 default:
1556                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1557                             "(%d).\n",
1558                             ha->host_no, stat & 0xff));
1559                         break;
1560                 }
1561                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1562                 RD_REG_DWORD_RELAXED(&reg->hccr);
1563         }
1564         spin_unlock(&ha->hardware_lock);
1565
1566         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1567             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1568                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1569                 complete(&ha->mbx_intr_comp);
1570         }
1571
1572         return IRQ_HANDLED;
1573 }
1574
1575 static irqreturn_t
1576 qla24xx_msix_rsp_q(int irq, void *dev_id)
1577 {
1578         scsi_qla_host_t *ha;
1579         struct device_reg_24xx __iomem *reg;
1580
1581         ha = dev_id;
1582         reg = &ha->iobase->isp24;
1583
1584         spin_lock(&ha->hardware_lock);
1585
1586         qla24xx_process_response_queue(ha);
1587         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1588
1589         spin_unlock(&ha->hardware_lock);
1590
1591         return IRQ_HANDLED;
1592 }
1593
1594 static irqreturn_t
1595 qla24xx_msix_default(int irq, void *dev_id)
1596 {
1597         scsi_qla_host_t *ha;
1598         struct device_reg_24xx __iomem *reg;
1599         int             status;
1600         uint32_t        stat;
1601         uint32_t        hccr;
1602         uint16_t        mb[4];
1603
1604         ha = dev_id;
1605         reg = &ha->iobase->isp24;
1606         status = 0;
1607
1608         spin_lock(&ha->hardware_lock);
1609         do {
1610                 stat = RD_REG_DWORD(&reg->host_status);
1611                 if (stat & HSRX_RISC_PAUSED) {
1612                         if (pci_channel_offline(ha->pdev))
1613                                 break;
1614
1615                         if (ha->hw_event_pause_errors == 0)
1616                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1617                                     0, MSW(stat), LSW(stat));
1618                         else if (ha->hw_event_pause_errors < 0xffffffff)
1619                                 ha->hw_event_pause_errors++;
1620
1621                         hccr = RD_REG_DWORD(&reg->hccr);
1622
1623                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1624                             "Dumping firmware!\n", hccr);
1625
1626                         qla2xxx_check_risc_status(ha);
1627
1628                         ha->isp_ops->fw_dump(ha, 1);
1629                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1630                         break;
1631                 } else if ((stat & HSRX_RISC_INT) == 0)
1632                         break;
1633
1634                 switch (stat & 0xff) {
1635                 case 0x1:
1636                 case 0x2:
1637                 case 0x10:
1638                 case 0x11:
1639                         qla24xx_mbx_completion(ha, MSW(stat));
1640                         status |= MBX_INTERRUPT;
1641
1642                         break;
1643                 case 0x12:
1644                         mb[0] = MSW(stat);
1645                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1646                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1647                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1648                         qla2x00_async_event(ha, mb);
1649                         break;
1650                 case 0x13:
1651                         qla24xx_process_response_queue(ha);
1652                         break;
1653                 default:
1654                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1655                             "(%d).\n",
1656                             ha->host_no, stat & 0xff));
1657                         break;
1658                 }
1659                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1660         } while (0);
1661         spin_unlock(&ha->hardware_lock);
1662
1663         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1664             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1665                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1666                 complete(&ha->mbx_intr_comp);
1667         }
1668
1669         return IRQ_HANDLED;
1670 }
1671
1672 /* Interrupt handling helpers. */
1673
1674 struct qla_init_msix_entry {
1675         uint16_t entry;
1676         uint16_t index;
1677         const char *name;
1678         irq_handler_t handler;
1679 };
1680
1681 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1682         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1683                 "qla2xxx (default)", qla24xx_msix_default },
1684
1685         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1686                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1687 };
1688
1689 static void
1690 qla24xx_disable_msix(scsi_qla_host_t *ha)
1691 {
1692         int i;
1693         struct qla_msix_entry *qentry;
1694
1695         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1696                 qentry = &ha->msix_entries[imsix_entries[i].index];
1697                 if (qentry->have_irq)
1698                         free_irq(qentry->msix_vector, ha);
1699         }
1700         pci_disable_msix(ha->pdev);
1701 }
1702
1703 static int
1704 qla24xx_enable_msix(scsi_qla_host_t *ha)
1705 {
1706         int i, ret;
1707         struct msix_entry entries[QLA_MSIX_ENTRIES];
1708         struct qla_msix_entry *qentry;
1709
1710         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1711                 entries[i].entry = imsix_entries[i].entry;
1712
1713         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1714         if (ret) {
1715                 qla_printk(KERN_WARNING, ha,
1716                     "MSI-X: Failed to enable support -- %d/%d\n",
1717                     QLA_MSIX_ENTRIES, ret);
1718                 goto msix_out;
1719         }
1720         ha->flags.msix_enabled = 1;
1721
1722         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1723                 qentry = &ha->msix_entries[imsix_entries[i].index];
1724                 qentry->msix_vector = entries[i].vector;
1725                 qentry->msix_entry = entries[i].entry;
1726                 qentry->have_irq = 0;
1727                 ret = request_irq(qentry->msix_vector,
1728                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1729                 if (ret) {
1730                         qla_printk(KERN_WARNING, ha,
1731                             "MSI-X: Unable to register handler -- %x/%d.\n",
1732                             imsix_entries[i].index, ret);
1733                         qla24xx_disable_msix(ha);
1734                         goto msix_out;
1735                 }
1736                 qentry->have_irq = 1;
1737         }
1738
1739 msix_out:
1740         return ret;
1741 }
1742
1743 int
1744 qla2x00_request_irqs(scsi_qla_host_t *ha)
1745 {
1746         int ret;
1747         device_reg_t __iomem *reg = ha->iobase;
1748
1749         /* If possible, enable MSI-X. */
1750         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1751                 goto skip_msix;
1752
1753         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1754             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1755                 DEBUG2(qla_printk(KERN_WARNING, ha,
1756                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1757                     ha->chip_revision, ha->fw_attributes));
1758
1759                 goto skip_msix;
1760         }
1761
1762         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1763             (ha->pdev->subsystem_device == 0x7040 ||
1764                 ha->pdev->subsystem_device == 0x7041 ||
1765                 ha->pdev->subsystem_device == 0x1705)) {
1766                 DEBUG2(qla_printk(KERN_WARNING, ha,
1767                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1768                     ha->pdev->subsystem_vendor,
1769                     ha->pdev->subsystem_device));
1770
1771                 goto skip_msi;
1772         }
1773
1774         ret = qla24xx_enable_msix(ha);
1775         if (!ret) {
1776                 DEBUG2(qla_printk(KERN_INFO, ha,
1777                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1778                     ha->fw_attributes));
1779                 goto clear_risc_ints;
1780         }
1781         qla_printk(KERN_WARNING, ha,
1782             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1783 skip_msix:
1784
1785         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1786                 goto skip_msi;
1787
1788         ret = pci_enable_msi(ha->pdev);
1789         if (!ret) {
1790                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1791                 ha->flags.msi_enabled = 1;
1792         }
1793 skip_msi:
1794
1795         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1796             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1797         if (ret) {
1798                 qla_printk(KERN_WARNING, ha,
1799                     "Failed to reserve interrupt %d already in use.\n",
1800                     ha->pdev->irq);
1801                 goto fail;
1802         }
1803         ha->flags.inta_enabled = 1;
1804         ha->host->irq = ha->pdev->irq;
1805 clear_risc_ints:
1806
1807         ha->isp_ops->disable_intrs(ha);
1808         spin_lock_irq(&ha->hardware_lock);
1809         if (IS_FWI2_CAPABLE(ha)) {
1810                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1811                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1812         } else {
1813                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1814                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1815                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1816         }
1817         spin_unlock_irq(&ha->hardware_lock);
1818         ha->isp_ops->enable_intrs(ha);
1819
1820 fail:
1821         return ret;
1822 }
1823
1824 void
1825 qla2x00_free_irqs(scsi_qla_host_t *ha)
1826 {
1827
1828         if (ha->flags.msix_enabled)
1829                 qla24xx_disable_msix(ha);
1830         else if (ha->flags.inta_enabled) {
1831                 free_irq(ha->host->irq, ha);
1832                 pci_disable_msi(ha->pdev);
1833         }
1834 }