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 *,
  14         struct req_que *, uint32_t);
  15 static void qla2x00_status_entry(scsi_qla_host_t *, struct rsp_que *, void *);
  16 static void qla2x00_status_cont_entry(struct rsp_que *, sts_cont_entry_t *);
  17 static void qla2x00_error_entry(scsi_qla_host_t *, struct rsp_que *,
  18         sts_entry_t *);
  19
  20 /**
  21  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  22  * @irq:
  23  * @dev_id: SCSI driver HA context
  24  *
  25  * Called by system whenever the host adapter generates an interrupt.
  26  *
  27  * Returns handled flag.
  28  */
  29 irqreturn_t
  30 qla2100_intr_handler(int irq, void *dev_id)
  31 {
  32         scsi_qla_host_t *vha;
  33         struct qla_hw_data *ha;
  34         struct device_reg_2xxx __iomem *reg;
  35         int             status;
  36         unsigned long   iter;
  37         uint16_t        hccr;
  38         uint16_t        mb[4];
  39         struct rsp_que *rsp;
  40
  41         rsp = (struct rsp_que *) dev_id;
  42         if (!rsp) {
  43                 printk(KERN_INFO
  44                     "%s(): NULL response queue pointer\n", __func__);
  45                 return (IRQ_NONE);
  46         }
  47
  48         ha = rsp->hw;
  49         reg = &ha->iobase->isp;
  50         status = 0;
  51
  52         spin_lock(&ha->hardware_lock);
  53         vha = pci_get_drvdata(ha->pdev);
  54         for (iter = 50; iter--; ) {
  55                 hccr = RD_REG_WORD(&reg->hccr);
  56                 if (hccr & HCCR_RISC_PAUSE) {
  57                         if (pci_channel_offline(ha->pdev))
  58                                 break;
  59
  60                         /*
  61                          * Issue a "HARD" reset in order for the RISC interrupt
  62                          * bit to be cleared.  Schedule a big hammmer to get
  63                          * out of the RISC PAUSED state.
  64                          */
  65                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  66                         RD_REG_WORD(&reg->hccr);
  67
  68                         ha->isp_ops->fw_dump(vha, 1);
  69                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
  70                         break;
  71                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  72                         break;
  73
  74                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  75                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  76                         RD_REG_WORD(&reg->hccr);
  77
  78                         /* Get mailbox data. */
  79                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  80                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  81                                 qla2x00_mbx_completion(vha, mb[0]);
  82                                 status |= MBX_INTERRUPT;
  83                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  84                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  85                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  86                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  87                                 qla2x00_async_event(vha, rsp, mb);
  88                         } else {
  89                                 /*EMPTY*/
  90                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  91                                     "interrupt type (%d).\n",
  92                                     vha->host_no, mb[0]));
  93                         }
  94                         /* Release mailbox registers. */
  95                         WRT_REG_WORD(&reg->semaphore, 0);
  96                         RD_REG_WORD(&reg->semaphore);
  97                 } else {
  98                         qla2x00_process_response_queue(rsp);
  99
 100                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 101                         RD_REG_WORD(&reg->hccr);
 102                 }
 103         }
 104         spin_unlock(&ha->hardware_lock);
 105
 106         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 107             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 108                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 109                 complete(&ha->mbx_intr_comp);
 110         }
 111
 112         return (IRQ_HANDLED);
 113 }
 114
 115 /**
 116  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 117  * @irq:
 118  * @dev_id: SCSI driver HA context
 119  *
 120  * Called by system whenever the host adapter generates an interrupt.
 121  *
 122  * Returns handled flag.
 123  */
 124 irqreturn_t
 125 qla2300_intr_handler(int irq, void *dev_id)
 126 {
 127         scsi_qla_host_t *vha;
 128         struct device_reg_2xxx __iomem *reg;
 129         int             status;
 130         unsigned long   iter;
 131         uint32_t        stat;
 132         uint16_t        hccr;
 133         uint16_t        mb[4];
 134         struct rsp_que *rsp;
 135         struct qla_hw_data *ha;
 136
 137         rsp = (struct rsp_que *) dev_id;
 138         if (!rsp) {
 139                 printk(KERN_INFO
 140                     "%s(): NULL response queue pointer\n", __func__);
 141                 return (IRQ_NONE);
 142         }
 143
 144         ha = rsp->hw;
 145         reg = &ha->iobase->isp;
 146         status = 0;
 147
 148         spin_lock(&ha->hardware_lock);
 149         vha = pci_get_drvdata(ha->pdev);
 150         for (iter = 50; iter--; ) {
 151                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 152                 if (stat & HSR_RISC_PAUSED) {
 153                         if (pci_channel_offline(ha->pdev))
 154                                 break;
 155
 156                         hccr = RD_REG_WORD(&reg->hccr);
 157                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 158                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 159                                     "HCCR=%x, Dumping firmware!\n", hccr);
 160                         else
 161                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 162                                     "HCCR=%x, Dumping firmware!\n", hccr);
 163
 164                         /*
 165                          * Issue a "HARD" reset in order for the RISC
 166                          * interrupt bit to be cleared.  Schedule a big
 167                          * hammmer to get out of the RISC PAUSED state.
 168                          */
 169                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 170                         RD_REG_WORD(&reg->hccr);
 171
 172                         ha->isp_ops->fw_dump(vha, 1);
 173                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 174                         break;
 175                 } else if ((stat & HSR_RISC_INT) == 0)
 176                         break;
 177
 178                 switch (stat & 0xff) {
 179                 case 0x1:
 180                 case 0x2:
 181                 case 0x10:
 182                 case 0x11:
 183                         qla2x00_mbx_completion(vha, MSW(stat));
 184                         status |= MBX_INTERRUPT;
 185
 186                         /* Release mailbox registers. */
 187                         WRT_REG_WORD(&reg->semaphore, 0);
 188                         break;
 189                 case 0x12:
 190                         mb[0] = MSW(stat);
 191                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 192                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 193                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 194                         qla2x00_async_event(vha, rsp, mb);
 195                         break;
 196                 case 0x13:
 197                         qla2x00_process_response_queue(rsp);
 198                         break;
 199                 case 0x15:
 200                         mb[0] = MBA_CMPLT_1_16BIT;
 201                         mb[1] = MSW(stat);
 202                         qla2x00_async_event(vha, rsp, mb);
 203                         break;
 204                 case 0x16:
 205                         mb[0] = MBA_SCSI_COMPLETION;
 206                         mb[1] = MSW(stat);
 207                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 208                         qla2x00_async_event(vha, rsp, mb);
 209                         break;
 210                 default:
 211                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 212                             "(%d).\n",
 213                             vha->host_no, stat & 0xff));
 214                         break;
 215                 }
 216                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 217                 RD_REG_WORD_RELAXED(&reg->hccr);
 218         }
 219         spin_unlock(&ha->hardware_lock);
 220
 221         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 222             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 223                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 224                 complete(&ha->mbx_intr_comp);
 225         }
 226
 227         return (IRQ_HANDLED);
 228 }
 229
 230 /**
 231  * qla2x00_mbx_completion() - Process mailbox command completions.
 232  * @ha: SCSI driver HA context
 233  * @mb0: Mailbox0 register
 234  */
 235 static void
 236 qla2x00_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
 237 {
 238         uint16_t        cnt;
 239         uint16_t __iomem *wptr;
 240         struct qla_hw_data *ha = vha->hw;
 241         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 242
 243         /* Load return mailbox registers. */
 244         ha->flags.mbox_int = 1;
 245         ha->mailbox_out[0] = mb0;
 246         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 247
 248         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 249                 if (IS_QLA2200(ha) && cnt == 8)
 250                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 251                 if (cnt == 4 || cnt == 5)
 252                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 253                 else
 254                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 255
 256                 wptr++;
 257         }
 258
 259         if (ha->mcp) {
 260                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 261                     __func__, vha->host_no, ha->mcp->mb[0]));
 262         } else {
 263                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 264                     __func__, vha->host_no));
 265         }
 266 }
 267
 268 static void
 269 qla81xx_idc_event(scsi_qla_host_t *vha, uint16_t aen, uint16_t descr)
 270 {
 271         static char *event[] =
 272                 { "Complete", "Request Notification", "Time Extension" };
 273         int rval;
 274         struct device_reg_24xx __iomem *reg24 = &vha->hw->iobase->isp24;
 275         uint16_t __iomem *wptr;
 276         uint16_t cnt, timeout, mb[QLA_IDC_ACK_REGS];
 277
 278         /* Seed data -- mailbox1 -> mailbox7. */
 279         wptr = (uint16_t __iomem *)&reg24->mailbox1;
 280         for (cnt = 0; cnt < QLA_IDC_ACK_REGS; cnt++, wptr++)
 281                 mb[cnt] = RD_REG_WORD(wptr);
 282
 283         DEBUG2(printk("scsi(%ld): Inter-Driver Commucation %s -- "
 284             "%04x %04x %04x %04x %04x %04x %04x.\n", vha->host_no,
 285             event[aen & 0xff],
 286             mb[0], mb[1], mb[2], mb[3], mb[4], mb[5], mb[6]));
 287
 288         /* Acknowledgement needed? [Notify && non-zero timeout]. */
 289         timeout = (descr >> 8) & 0xf;
 290         if (aen != MBA_IDC_NOTIFY || !timeout)
 291                 return;
 292
 293         DEBUG2(printk("scsi(%ld): Inter-Driver Commucation %s -- "
 294             "ACK timeout=%d.\n", vha->host_no, event[aen & 0xff], timeout));
 295
 296         rval = qla2x00_post_idc_ack_work(vha, mb);
 297         if (rval != QLA_SUCCESS)
 298                 qla_printk(KERN_WARNING, vha->hw,
 299                     "IDC failed to post ACK.\n");
 300 }
 301
 302 /**
 303  * qla2x00_async_event() - Process aynchronous events.
 304  * @ha: SCSI driver HA context
 305  * @mb: Mailbox registers (0 - 3)
 306  */
 307 void
 308 qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 309 {
 310 #define LS_UNKNOWN      2
 311         static char     *link_speeds[] = { "1", "2", "?", "4", "8", "10" };
 312         char            *link_speed;
 313         uint16_t        handle_cnt;
 314         uint16_t        cnt;
 315         uint32_t        handles[5];
 316         struct qla_hw_data *ha = vha->hw;
 317         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 318         uint32_t        rscn_entry, host_pid;
 319         uint8_t         rscn_queue_index;
 320         unsigned long   flags;
 321
 322         /* Setup to process RIO completion. */
 323         handle_cnt = 0;
 324         if (IS_QLA81XX(ha))
 325                 goto skip_rio;
 326         switch (mb[0]) {
 327         case MBA_SCSI_COMPLETION:
 328                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 329                 handle_cnt = 1;
 330                 break;
 331         case MBA_CMPLT_1_16BIT:
 332                 handles[0] = mb[1];
 333                 handle_cnt = 1;
 334                 mb[0] = MBA_SCSI_COMPLETION;
 335                 break;
 336         case MBA_CMPLT_2_16BIT:
 337                 handles[0] = mb[1];
 338                 handles[1] = mb[2];
 339                 handle_cnt = 2;
 340                 mb[0] = MBA_SCSI_COMPLETION;
 341                 break;
 342         case MBA_CMPLT_3_16BIT:
 343                 handles[0] = mb[1];
 344                 handles[1] = mb[2];
 345                 handles[2] = mb[3];
 346                 handle_cnt = 3;
 347                 mb[0] = MBA_SCSI_COMPLETION;
 348                 break;
 349         case MBA_CMPLT_4_16BIT:
 350                 handles[0] = mb[1];
 351                 handles[1] = mb[2];
 352                 handles[2] = mb[3];
 353                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 354                 handle_cnt = 4;
 355                 mb[0] = MBA_SCSI_COMPLETION;
 356                 break;
 357         case MBA_CMPLT_5_16BIT:
 358                 handles[0] = mb[1];
 359                 handles[1] = mb[2];
 360                 handles[2] = mb[3];
 361                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 362                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 363                 handle_cnt = 5;
 364                 mb[0] = MBA_SCSI_COMPLETION;
 365                 break;
 366         case MBA_CMPLT_2_32BIT:
 367                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 368                 handles[1] = le32_to_cpu(
 369                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 370                     RD_MAILBOX_REG(ha, reg, 6));
 371                 handle_cnt = 2;
 372                 mb[0] = MBA_SCSI_COMPLETION;
 373                 break;
 374         default:
 375                 break;
 376         }
 377 skip_rio:
 378         switch (mb[0]) {
 379         case MBA_SCSI_COMPLETION:       /* Fast Post */
 380                 if (!vha->flags.online)
 381                         break;
 382
 383                 for (cnt = 0; cnt < handle_cnt; cnt++)
 384                         qla2x00_process_completed_request(vha, rsp->req,
 385                                 handles[cnt]);
 386                 break;
 387
 388         case MBA_RESET:                 /* Reset */
 389                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n",
 390                         vha->host_no));
 391
 392                 set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
 393                 break;
 394
 395         case MBA_SYSTEM_ERR:            /* System Error */
 396                 qla_printk(KERN_INFO, ha,
 397                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 398                     mb[1], mb[2], mb[3]);
 399
 400                 ha->isp_ops->fw_dump(vha, 1);
 401
 402                 if (IS_FWI2_CAPABLE(ha)) {
 403                         if (mb[1] == 0 && mb[2] == 0) {
 404                                 qla_printk(KERN_ERR, ha,
 405                                     "Unrecoverable Hardware Error: adapter "
 406                                     "marked OFFLINE!\n");
 407                                 vha->flags.online = 0;
 408                         } else
 409                                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 410                 } else if (mb[1] == 0) {
 411                         qla_printk(KERN_INFO, ha,
 412                             "Unrecoverable Hardware Error: adapter marked "
 413                             "OFFLINE!\n");
 414                         vha->flags.online = 0;
 415                 } else
 416                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 417                 break;
 418
 419         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 420                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 421                     vha->host_no));
 422                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 423
 424                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 425                 break;
 426
 427         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 428                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 429                     vha->host_no));
 430                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 431
 432                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 433                 break;
 434
 435         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 436                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 437                     vha->host_no));
 438                 break;
 439
 440         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 441                 DEBUG2(printk("scsi(%ld): LIP occurred (%x).\n", vha->host_no,
 442                     mb[1]));
 443                 qla_printk(KERN_INFO, ha, "LIP occurred (%x).\n", mb[1]);
 444
 445                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 446                         atomic_set(&vha->loop_state, LOOP_DOWN);
 447                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 448                         qla2x00_mark_all_devices_lost(vha, 1);
 449                 }
 450
 451                 if (vha->vp_idx) {
 452                         atomic_set(&vha->vp_state, VP_FAILED);
 453                         fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 454                 }
 455
 456                 set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 457                 set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 458
 459                 vha->flags.management_server_logged_in = 0;
 460                 qla2x00_post_aen_work(vha, FCH_EVT_LIP, mb[1]);
 461                 break;
 462
 463         case MBA_LOOP_UP:               /* Loop Up Event */
 464                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 465                         link_speed = link_speeds[0];
 466                         ha->link_data_rate = PORT_SPEED_1GB;
 467                 } else {
 468                         link_speed = link_speeds[LS_UNKNOWN];
 469                         if (mb[1] < 5)
 470                                 link_speed = link_speeds[mb[1]];
 471                         else if (mb[1] == 0x13)
 472                                 link_speed = link_speeds[5];
 473                         ha->link_data_rate = mb[1];
 474                 }
 475
 476                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 477                     vha->host_no, link_speed));
 478                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 479                     link_speed);
 480
 481                 vha->flags.management_server_logged_in = 0;
 482                 qla2x00_post_aen_work(vha, FCH_EVT_LINKUP, ha->link_data_rate);
 483                 break;
 484
 485         case MBA_LOOP_DOWN:             /* Loop Down Event */
 486                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
 487                     "(%x %x %x).\n", vha->host_no, mb[1], mb[2], mb[3]));
 488                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
 489                     mb[1], mb[2], mb[3]);
 490
 491                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 492                         atomic_set(&vha->loop_state, LOOP_DOWN);
 493                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 494                         vha->device_flags |= DFLG_NO_CABLE;
 495                         qla2x00_mark_all_devices_lost(vha, 1);
 496                 }
 497
 498                 if (vha->vp_idx) {
 499                         atomic_set(&vha->vp_state, VP_FAILED);
 500                         fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 501                 }
 502
 503                 vha->flags.management_server_logged_in = 0;
 504                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 505                 qla2x00_post_aen_work(vha, FCH_EVT_LINKDOWN, 0);
 506                 break;
 507
 508         case MBA_LIP_RESET:             /* LIP reset occurred */
 509                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 510                     vha->host_no, mb[1]));
 511                 qla_printk(KERN_INFO, ha,
 512                     "LIP reset occurred (%x).\n", mb[1]);
 513
 514                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 515                         atomic_set(&vha->loop_state, LOOP_DOWN);
 516                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
 517                         qla2x00_mark_all_devices_lost(vha, 1);
 518                 }
 519
 520                 if (vha->vp_idx) {
 521                         atomic_set(&vha->vp_state, VP_FAILED);
 522                         fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 523                 }
 524
 525                 set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
 526
 527                 ha->operating_mode = LOOP;
 528                 vha->flags.management_server_logged_in = 0;
 529                 qla2x00_post_aen_work(vha, FCH_EVT_LIPRESET, mb[1]);
 530                 break;
 531
 532         /* case MBA_DCBX_COMPLETE: */
 533         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 534                 if (IS_QLA2100(ha))
 535                         break;
 536
 537                 if (IS_QLA81XX(ha))
 538                         DEBUG2(printk("scsi(%ld): DCBX Completed -- %04x %04x "
 539                             "%04x\n", vha->host_no, mb[1], mb[2], mb[3]));
 540                 else
 541                         DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE "
 542                             "received.\n", vha->host_no));
 543
 544                 /*
 545                  * Until there's a transition from loop down to loop up, treat
 546                  * this as loop down only.
 547                  */
 548                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 549                         atomic_set(&vha->loop_state, LOOP_DOWN);
 550                         if (!atomic_read(&vha->loop_down_timer))
 551                                 atomic_set(&vha->loop_down_timer,
 552                                     LOOP_DOWN_TIME);
 553                         qla2x00_mark_all_devices_lost(vha, 1);
 554                 }
 555
 556                 if (vha->vp_idx) {
 557                         atomic_set(&vha->vp_state, VP_FAILED);
 558                         fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 559                 }
 560
 561                 if (!(test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags)))
 562                         set_bit(RESET_MARKER_NEEDED, &vha->dpc_flags);
 563
 564                 set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 565                 set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 566
 567                 ha->flags.gpsc_supported = 1;
 568                 vha->flags.management_server_logged_in = 0;
 569                 break;
 570
 571         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 572                 if (IS_QLA2100(ha))
 573                         break;
 574
 575                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 576                     "received.\n",
 577                     vha->host_no));
 578                 qla_printk(KERN_INFO, ha,
 579                     "Configuration change detected: value=%x.\n", mb[1]);
 580
 581                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
 582                         atomic_set(&vha->loop_state, LOOP_DOWN);
 583                         if (!atomic_read(&vha->loop_down_timer))
 584                                 atomic_set(&vha->loop_down_timer,
 585                                     LOOP_DOWN_TIME);
 586                         qla2x00_mark_all_devices_lost(vha, 1);
 587                 }
 588
 589                 if (vha->vp_idx) {
 590                         atomic_set(&vha->vp_state, VP_FAILED);
 591                         fc_vport_set_state(vha->fc_vport, FC_VPORT_FAILED);
 592                 }
 593
 594                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
 595                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
 596                 break;
 597
 598         case MBA_PORT_UPDATE:           /* Port database update */
 599                 /* Only handle SCNs for our Vport index. */
 600                 if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
 601                         break;
 602
 603                 /*
 604                  * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
 605                  * event etc. earlier indicating loop is down) then process
 606                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 607                  */
 608                 atomic_set(&vha->loop_down_timer, 0);
 609                 if (atomic_read(&vha->loop_state) != LOOP_DOWN &&
 610                     atomic_read(&vha->loop_state) != LOOP_DEAD) {
 611                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 612                             "ignored %04x/%04x/%04x.\n", vha->host_no, mb[1],
 613                             mb[2], mb[3]));
 614                         break;
 615                 }
 616
 617                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 618                     vha->host_no));
 619                 DEBUG(printk(KERN_INFO
 620                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 621                     vha->host_no, mb[1], mb[2], mb[3]));
 622
 623                 /*
 624                  * Mark all devices as missing so we will login again.
 625                  */
 626                 atomic_set(&vha->loop_state, LOOP_UP);
 627
 628                 qla2x00_mark_all_devices_lost(vha, 1);
 629
 630                 vha->flags.rscn_queue_overflow = 1;
 631
 632                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
 633                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
 634                 break;
 635
 636         case MBA_RSCN_UPDATE:           /* State Change Registration */
 637                 /* Check if the Vport has issued a SCR */
 638                 if (vha->vp_idx && test_bit(VP_SCR_NEEDED, &vha->vp_flags))
 639                         break;
 640                 /* Only handle SCNs for our Vport index. */
 641                 if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
 642                         break;
 643                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 644                     vha->host_no));
 645                 DEBUG(printk(KERN_INFO
 646                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 647                     vha->host_no, mb[1], mb[2], mb[3]));
 648
 649                 rscn_entry = ((mb[1] & 0xff) << 16) | mb[2];
 650                 host_pid = (vha->d_id.b.domain << 16) | (vha->d_id.b.area << 8)
 651                                 | vha->d_id.b.al_pa;
 652                 if (rscn_entry == host_pid) {
 653                         DEBUG(printk(KERN_INFO
 654                             "scsi(%ld): Ignoring RSCN update to local host "
 655                             "port ID (%06x)\n",
 656                             vha->host_no, host_pid));
 657                         break;
 658                 }
 659
 660                 /* Ignore reserved bits from RSCN-payload. */
 661                 rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];
 662                 rscn_queue_index = vha->rscn_in_ptr + 1;
 663                 if (rscn_queue_index == MAX_RSCN_COUNT)
 664                         rscn_queue_index = 0;
 665                 if (rscn_queue_index != vha->rscn_out_ptr) {
 666                         vha->rscn_queue[vha->rscn_in_ptr] = rscn_entry;
 667                         vha->rscn_in_ptr = rscn_queue_index;
 668                 } else {
 669                         vha->flags.rscn_queue_overflow = 1;
 670                 }
 671
 672                 atomic_set(&vha->loop_state, LOOP_UPDATE);
 673                 atomic_set(&vha->loop_down_timer, 0);
 674                 vha->flags.management_server_logged_in = 0;
 675
 676                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
 677                 set_bit(RSCN_UPDATE, &vha->dpc_flags);
 678                 qla2x00_post_aen_work(vha, FCH_EVT_RSCN, rscn_entry);
 679                 break;
 680
 681         /* case MBA_RIO_RESPONSE: */
 682         case MBA_ZIO_RESPONSE:
 683                 DEBUG3(printk("scsi(%ld): [R|Z]IO update completion.\n",
 684                     vha->host_no));
 685
 686                 if (IS_FWI2_CAPABLE(ha))
 687                         qla24xx_process_response_queue(vha, rsp);
 688                 else
 689                         qla2x00_process_response_queue(rsp);
 690                 break;
 691
 692         case MBA_DISCARD_RND_FRAME:
 693                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 694                     "%04x.\n", vha->host_no, mb[1], mb[2], mb[3]));
 695                 break;
 696
 697         case MBA_TRACE_NOTIFICATION:
 698                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 699                 vha->host_no, mb[1], mb[2]));
 700                 break;
 701
 702         case MBA_ISP84XX_ALERT:
 703                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
 704                     "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
 705
 706                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
 707                 switch (mb[1]) {
 708                 case A84_PANIC_RECOVERY:
 709                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
 710                             "%04x %04x\n", mb[2], mb[3]);
 711                         break;
 712                 case A84_OP_LOGIN_COMPLETE:
 713                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
 714                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 715                             "firmware version %x\n", ha->cs84xx->op_fw_version));
 716                         break;
 717                 case A84_DIAG_LOGIN_COMPLETE:
 718                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 719                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 720                             "diagnostic firmware version %x\n",
 721                             ha->cs84xx->diag_fw_version));
 722                         break;
 723                 case A84_GOLD_LOGIN_COMPLETE:
 724                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 725                         ha->cs84xx->fw_update = 1;
 726                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
 727                             "firmware version %x\n",
 728                             ha->cs84xx->gold_fw_version));
 729                         break;
 730                 default:
 731                         qla_printk(KERN_ERR, ha,
 732                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
 733                             mb[1], mb[2], mb[3]);
 734                 }
 735                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
 736                 break;
 737         case MBA_DCBX_START:
 738                 DEBUG2(printk("scsi(%ld): DCBX Started -- %04x %04x %04x\n",
 739                     vha->host_no, mb[1], mb[2], mb[3]));
 740                 break;
 741         case MBA_DCBX_PARAM_UPDATE:
 742                 DEBUG2(printk("scsi(%ld): DCBX Parameters Updated -- "
 743                     "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
 744                 break;
 745         case MBA_FCF_CONF_ERR:
 746                 DEBUG2(printk("scsi(%ld): FCF Configuration Error -- "
 747                     "%04x %04x %04x\n", vha->host_no, mb[1], mb[2], mb[3]));
 748                 break;
 749         case MBA_IDC_COMPLETE:
 750         case MBA_IDC_NOTIFY:
 751         case MBA_IDC_TIME_EXT:
 752                 qla81xx_idc_event(vha, mb[0], mb[1]);
 753                 break;
 754         }
 755
 756         if (!vha->vp_idx && ha->num_vhosts)
 757                 qla2x00_alert_all_vps(rsp, mb);
 758 }
 759
 760 static void
 761 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 762 {
 763         fc_port_t *fcport = data;
 764         struct scsi_qla_host *vha = fcport->vha;
 765         struct qla_hw_data *ha = vha->hw;
 766         struct req_que *req = NULL;
 767
 768         req = vha->req;
 769         if (!req)
 770                 return;
 771         if (req->max_q_depth <= sdev->queue_depth)
 772                 return;
 773
 774         if (sdev->ordered_tags)
 775                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 776                     sdev->queue_depth + 1);
 777         else
 778                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 779                     sdev->queue_depth + 1);
 780
 781         fcport->last_ramp_up = jiffies;
 782
 783         DEBUG2(qla_printk(KERN_INFO, ha,
 784             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 785             fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
 786             sdev->queue_depth));
 787 }
 788
 789 static void
 790 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 791 {
 792         fc_port_t *fcport = data;
 793
 794         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 795                 return;
 796
 797         DEBUG2(qla_printk(KERN_INFO, fcport->vha->hw,
 798             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 799             fcport->vha->host_no, sdev->channel, sdev->id, sdev->lun,
 800             sdev->queue_depth));
 801 }
 802
 803 static inline void
 804 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *vha, struct req_que *req,
 805                                                                 srb_t *sp)
 806 {
 807         fc_port_t *fcport;
 808         struct scsi_device *sdev;
 809
 810         sdev = sp->cmd->device;
 811         if (sdev->queue_depth >= req->max_q_depth)
 812                 return;
 813
 814         fcport = sp->fcport;
 815         if (time_before(jiffies,
 816             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 817                 return;
 818         if (time_before(jiffies,
 819             fcport->last_queue_full + ql2xqfullrampup * HZ))
 820                 return;
 821
 822         starget_for_each_device(sdev->sdev_target, fcport,
 823             qla2x00_adjust_sdev_qdepth_up);
 824 }
 825
 826 /**
 827  * qla2x00_process_completed_request() - Process a Fast Post response.
 828  * @ha: SCSI driver HA context
 829  * @index: SRB index
 830  */
 831 static void
 832 qla2x00_process_completed_request(struct scsi_qla_host *vha,
 833                                 struct req_que *req, uint32_t index)
 834 {
 835         srb_t *sp;
 836         struct qla_hw_data *ha = vha->hw;
 837
 838         /* Validate handle. */
 839         if (index >= MAX_OUTSTANDING_COMMANDS) {
 840                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 841                     vha->host_no, index));
 842                 qla_printk(KERN_WARNING, ha,
 843                     "Invalid SCSI completion handle %d.\n", index);
 844
 845                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 846                 return;
 847         }
 848
 849         sp = req->outstanding_cmds[index];
 850         if (sp) {
 851                 /* Free outstanding command slot. */
 852                 req->outstanding_cmds[index] = NULL;
 853
 854                 /* Save ISP completion status */
 855                 sp->cmd->result = DID_OK << 16;
 856
 857                 qla2x00_ramp_up_queue_depth(vha, req, sp);
 858                 qla2x00_sp_compl(ha, sp);
 859         } else {
 860                 DEBUG2(printk("scsi(%ld) Req:%d: Invalid ISP SCSI completion"
 861                         " handle(%d)\n", vha->host_no, req->id, index));
 862                 qla_printk(KERN_WARNING, ha,
 863                     "Invalid ISP SCSI completion handle\n");
 864
 865                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 866         }
 867 }
 868
 869 /**
 870  * qla2x00_process_response_queue() - Process response queue entries.
 871  * @ha: SCSI driver HA context
 872  */
 873 void
 874 qla2x00_process_response_queue(struct rsp_que *rsp)
 875 {
 876         struct scsi_qla_host *vha;
 877         struct qla_hw_data *ha = rsp->hw;
 878         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 879         sts_entry_t     *pkt;
 880         uint16_t        handle_cnt;
 881         uint16_t        cnt;
 882
 883         vha = pci_get_drvdata(ha->pdev);
 884
 885         if (!vha->flags.online)
 886                 return;
 887
 888         while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
 889                 pkt = (sts_entry_t *)rsp->ring_ptr;
 890
 891                 rsp->ring_index++;
 892                 if (rsp->ring_index == rsp->length) {
 893                         rsp->ring_index = 0;
 894                         rsp->ring_ptr = rsp->ring;
 895                 } else {
 896                         rsp->ring_ptr++;
 897                 }
 898
 899                 if (pkt->entry_status != 0) {
 900                         DEBUG3(printk(KERN_INFO
 901                             "scsi(%ld): Process error entry.\n", vha->host_no));
 902
 903                         qla2x00_error_entry(vha, rsp, pkt);
 904                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 905                         wmb();
 906                         continue;
 907                 }
 908
 909                 switch (pkt->entry_type) {
 910                 case STATUS_TYPE:
 911                         qla2x00_status_entry(vha, rsp, pkt);
 912                         break;
 913                 case STATUS_TYPE_21:
 914                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 915                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 916                                 qla2x00_process_completed_request(vha, rsp->req,
 917                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 918                         }
 919                         break;
 920                 case STATUS_TYPE_22:
 921                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 922                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 923                                 qla2x00_process_completed_request(vha, rsp->req,
 924                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 925                         }
 926                         break;
 927                 case STATUS_CONT_TYPE:
 928                         qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
 929                         break;
 930                 default:
 931                         /* Type Not Supported. */
 932                         DEBUG4(printk(KERN_WARNING
 933                             "scsi(%ld): Received unknown response pkt type %x "
 934                             "entry status=%x.\n",
 935                             vha->host_no, pkt->entry_type, pkt->entry_status));
 936                         break;
 937                 }
 938                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 939                 wmb();
 940         }
 941
 942         /* Adjust ring index */
 943         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), rsp->ring_index);
 944 }
 945
 946 static inline void
 947 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len,
 948         struct rsp_que *rsp)
 949 {
 950         struct scsi_cmnd *cp = sp->cmd;
 951
 952         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 953                 sense_len = SCSI_SENSE_BUFFERSIZE;
 954
 955         sp->request_sense_length = sense_len;
 956         sp->request_sense_ptr = cp->sense_buffer;
 957         if (sp->request_sense_length > 32)
 958                 sense_len = 32;
 959
 960         memcpy(cp->sense_buffer, sense_data, sense_len);
 961
 962         sp->request_sense_ptr += sense_len;
 963         sp->request_sense_length -= sense_len;
 964         if (sp->request_sense_length != 0)
 965                 rsp->status_srb = sp;
 966
 967         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 968             "cmd=%p pid=%ld\n", __func__, sp->fcport->vha->host_no,
 969             cp->device->channel, cp->device->id, cp->device->lun, cp,
 970             cp->serial_number));
 971         if (sense_len)
 972                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer, sense_len));
 973 }
 974
 975 /**
 976  * qla2x00_status_entry() - Process a Status IOCB entry.
 977  * @ha: SCSI driver HA context
 978  * @pkt: Entry pointer
 979  */
 980 static void
 981 qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
 982 {
 983         srb_t           *sp;
 984         fc_port_t       *fcport;
 985         struct scsi_cmnd *cp;
 986         sts_entry_t *sts;
 987         struct sts_entry_24xx *sts24;
 988         uint16_t        comp_status;
 989         uint16_t        scsi_status;
 990         uint8_t         lscsi_status;
 991         int32_t         resid;
 992         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 993         uint8_t         *rsp_info, *sense_data;
 994         struct qla_hw_data *ha = vha->hw;
 995         uint32_t handle;
 996         uint16_t que;
 997         struct req_que *req;
 998
 999         sts = (sts_entry_t *) pkt;
1000         sts24 = (struct sts_entry_24xx *) pkt;
1001         if (IS_FWI2_CAPABLE(ha)) {
1002                 comp_status = le16_to_cpu(sts24->comp_status);
1003                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
1004         } else {
1005                 comp_status = le16_to_cpu(sts->comp_status);
1006                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
1007         }
1008         handle = (uint32_t) LSW(sts->handle);
1009         que = MSW(sts->handle);
1010         req = ha->req_q_map[que];
1011         /* Fast path completion. */
1012         if (comp_status == CS_COMPLETE && scsi_status == 0) {
1013                 qla2x00_process_completed_request(vha, req, handle);
1014
1015                 return;
1016         }
1017
1018         /* Validate handle. */
1019         if (handle < MAX_OUTSTANDING_COMMANDS) {
1020                 sp = req->outstanding_cmds[handle];
1021                 req->outstanding_cmds[handle] = NULL;
1022         } else
1023                 sp = NULL;
1024
1025         if (sp == NULL) {
1026                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
1027                     vha->host_no));
1028                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
1029
1030                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1031                 qla2xxx_wake_dpc(vha);
1032                 return;
1033         }
1034         cp = sp->cmd;
1035         if (cp == NULL) {
1036                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
1037                     "pkt->handle=%d sp=%p.\n", vha->host_no, handle, sp));
1038                 qla_printk(KERN_WARNING, ha,
1039                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
1040
1041                 return;
1042         }
1043
1044         lscsi_status = scsi_status & STATUS_MASK;
1045
1046         fcport = sp->fcport;
1047
1048         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
1049         if (IS_FWI2_CAPABLE(ha)) {
1050                 sense_len = le32_to_cpu(sts24->sense_len);
1051                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
1052                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
1053                 fw_resid_len = le32_to_cpu(sts24->residual_len);
1054                 rsp_info = sts24->data;
1055                 sense_data = sts24->data;
1056                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
1057         } else {
1058                 sense_len = le16_to_cpu(sts->req_sense_length);
1059                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
1060                 resid_len = le32_to_cpu(sts->residual_length);
1061                 rsp_info = sts->rsp_info;
1062                 sense_data = sts->req_sense_data;
1063         }
1064
1065         /* Check for any FCP transport errors. */
1066         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
1067                 /* Sense data lies beyond any FCP RESPONSE data. */
1068                 if (IS_FWI2_CAPABLE(ha))
1069                         sense_data += rsp_info_len;
1070                 if (rsp_info_len > 3 && rsp_info[3]) {
1071                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
1072                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
1073                             "retrying command\n", vha->host_no,
1074                             cp->device->channel, cp->device->id,
1075                             cp->device->lun, rsp_info_len, rsp_info[0],
1076                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
1077                             rsp_info[5], rsp_info[6], rsp_info[7]));
1078
1079                         cp->result = DID_BUS_BUSY << 16;
1080                         qla2x00_sp_compl(ha, sp);
1081                         return;
1082                 }
1083         }
1084
1085         /* Check for overrun. */
1086         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1087             scsi_status & SS_RESIDUAL_OVER)
1088                 comp_status = CS_DATA_OVERRUN;
1089
1090         /*
1091          * Based on Host and scsi status generate status code for Linux
1092          */
1093         switch (comp_status) {
1094         case CS_COMPLETE:
1095         case CS_QUEUE_FULL:
1096                 if (scsi_status == 0) {
1097                         cp->result = DID_OK << 16;
1098                         break;
1099                 }
1100                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1101                         resid = resid_len;
1102                         scsi_set_resid(cp, resid);
1103
1104                         if (!lscsi_status &&
1105                             ((unsigned)(scsi_bufflen(cp) - resid) <
1106                              cp->underflow)) {
1107                                 qla_printk(KERN_INFO, ha,
1108                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1109                                            "detected (%x of %x bytes)...returning "
1110                                            "error status.\n", vha->host_no,
1111                                            cp->device->channel, cp->device->id,
1112                                            cp->device->lun, resid,
1113                                            scsi_bufflen(cp));
1114
1115                                 cp->result = DID_ERROR << 16;
1116                                 break;
1117                         }
1118                 }
1119                 cp->result = DID_OK << 16 | lscsi_status;
1120
1121                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1122                         DEBUG2(printk(KERN_INFO
1123                             "scsi(%ld): QUEUE FULL status detected "
1124                             "0x%x-0x%x.\n", vha->host_no, comp_status,
1125                             scsi_status));
1126
1127                         /* Adjust queue depth for all luns on the port. */
1128                         fcport->last_queue_full = jiffies;
1129                         starget_for_each_device(cp->device->sdev_target,
1130                             fcport, qla2x00_adjust_sdev_qdepth_down);
1131                         break;
1132                 }
1133                 if (lscsi_status != SS_CHECK_CONDITION)
1134                         break;
1135
1136                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1137                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1138                         break;
1139
1140                 qla2x00_handle_sense(sp, sense_data, sense_len, rsp);
1141                 break;
1142
1143         case CS_DATA_UNDERRUN:
1144                 resid = resid_len;
1145                 /* Use F/W calculated residual length. */
1146                 if (IS_FWI2_CAPABLE(ha)) {
1147                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1148                                 lscsi_status = 0;
1149                         } else if (resid != fw_resid_len) {
1150                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1151                                 lscsi_status = 0;
1152                         }
1153                         resid = fw_resid_len;
1154                 }
1155
1156                 if (scsi_status & SS_RESIDUAL_UNDER) {
1157                         scsi_set_resid(cp, resid);
1158                 } else {
1159                         DEBUG2(printk(KERN_INFO
1160                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1161                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1162                             "os_underflow=0x%x\n", vha->host_no,
1163                             cp->device->id, cp->device->lun, comp_status,
1164                             scsi_status, resid_len, resid, cp->cmnd[0],
1165                             cp->underflow));
1166
1167                 }
1168
1169                 /*
1170                  * Check to see if SCSI Status is non zero. If so report SCSI
1171                  * Status.
1172                  */
1173                 if (lscsi_status != 0) {
1174                         cp->result = DID_OK << 16 | lscsi_status;
1175
1176                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1177                                 DEBUG2(printk(KERN_INFO
1178                                     "scsi(%ld): QUEUE FULL status detected "
1179                                     "0x%x-0x%x.\n", vha->host_no, comp_status,
1180                                     scsi_status));
1181
1182                                 /*
1183                                  * Adjust queue depth for all luns on the
1184                                  * port.
1185                                  */
1186                                 fcport->last_queue_full = jiffies;
1187                                 starget_for_each_device(
1188                                     cp->device->sdev_target, fcport,
1189                                     qla2x00_adjust_sdev_qdepth_down);
1190                                 break;
1191                         }
1192                         if (lscsi_status != SS_CHECK_CONDITION)
1193                                 break;
1194
1195                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1196                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1197                                 break;
1198
1199                         qla2x00_handle_sense(sp, sense_data, sense_len, rsp);
1200                 } else {
1201                         /*
1202                          * If RISC reports underrun and target does not report
1203                          * it then we must have a lost frame, so tell upper
1204                          * layer to retry it by reporting a bus busy.
1205                          */
1206                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1207                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1208                                               "frame(s) detected (%x of %x bytes)..."
1209                                               "retrying command.\n",
1210                                         vha->host_no, cp->device->channel,
1211                                         cp->device->id, cp->device->lun, resid,
1212                                         scsi_bufflen(cp)));
1213
1214                                 cp->result = DID_BUS_BUSY << 16;
1215                                 break;
1216                         }
1217
1218                         /* Handle mid-layer underflow */
1219                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1220                             cp->underflow) {
1221                                 qla_printk(KERN_INFO, ha,
1222                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1223                                            "detected (%x of %x bytes)...returning "
1224                                            "error status.\n", vha->host_no,
1225                                            cp->device->channel, cp->device->id,
1226                                            cp->device->lun, resid,
1227                                            scsi_bufflen(cp));
1228
1229                                 cp->result = DID_ERROR << 16;
1230                                 break;
1231                         }
1232
1233                         /* Everybody online, looking good... */
1234                         cp->result = DID_OK << 16;
1235                 }
1236                 break;
1237
1238         case CS_DATA_OVERRUN:
1239                 DEBUG2(printk(KERN_INFO
1240                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1241                     vha->host_no, cp->device->id, cp->device->lun, comp_status,
1242                     scsi_status));
1243                 DEBUG2(printk(KERN_INFO
1244                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1245                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1246                     cp->cmnd[4], cp->cmnd[5]));
1247                 DEBUG2(printk(KERN_INFO
1248                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1249                     "status!\n",
1250                     cp->serial_number, scsi_bufflen(cp), resid_len));
1251
1252                 cp->result = DID_ERROR << 16;
1253                 break;
1254
1255         case CS_PORT_LOGGED_OUT:
1256         case CS_PORT_CONFIG_CHG:
1257         case CS_PORT_BUSY:
1258         case CS_INCOMPLETE:
1259         case CS_PORT_UNAVAILABLE:
1260                 /*
1261                  * If the port is in Target Down state, return all IOs for this
1262                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1263                  * retry_queue.
1264                  */
1265                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1266                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1267                     vha->host_no, cp->device->id, cp->device->lun,
1268                     cp->serial_number, comp_status,
1269                     atomic_read(&fcport->state)));
1270
1271                 /*
1272                  * We are going to have the fc class block the rport
1273                  * while we try to recover so instruct the mid layer
1274                  * to requeue until the class decides how to handle this.
1275                  */
1276                 cp->result = DID_TRANSPORT_DISRUPTED << 16;
1277                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1278                         qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
1279                 break;
1280
1281         case CS_RESET:
1282                 DEBUG2(printk(KERN_INFO
1283                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1284                     vha->host_no, comp_status, scsi_status));
1285
1286                 cp->result = DID_RESET << 16;
1287                 break;
1288
1289         case CS_ABORTED:
1290                 /*
1291                  * hv2.19.12 - DID_ABORT does not retry the request if we
1292                  * aborted this request then abort otherwise it must be a
1293                  * reset.
1294                  */
1295                 DEBUG2(printk(KERN_INFO
1296                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1297                     vha->host_no, comp_status, scsi_status));
1298
1299                 cp->result = DID_RESET << 16;
1300                 break;
1301
1302         case CS_TIMEOUT:
1303                 /*
1304                  * We are going to have the fc class block the rport
1305                  * while we try to recover so instruct the mid layer
1306                  * to requeue until the class decides how to handle this.
1307                  */
1308                 cp->result = DID_TRANSPORT_DISRUPTED << 16;
1309
1310                 if (IS_FWI2_CAPABLE(ha)) {
1311                         DEBUG2(printk(KERN_INFO
1312                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1313                             "0x%x-0x%x\n", vha->host_no, cp->device->channel,
1314                             cp->device->id, cp->device->lun, comp_status,
1315                             scsi_status));
1316                         break;
1317                 }
1318                 DEBUG2(printk(KERN_INFO
1319                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1320                     "sflags=%x.\n", vha->host_no, cp->device->channel,
1321                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1322                     le16_to_cpu(sts->status_flags)));
1323
1324                 /* Check to see if logout occurred. */
1325                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1326                         qla2x00_mark_device_lost(fcport->vha, fcport, 1, 1);
1327                 break;
1328
1329         default:
1330                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1331                     "0x%x-0x%x.\n", vha->host_no, comp_status, scsi_status));
1332                 qla_printk(KERN_INFO, ha,
1333                     "Unknown status detected 0x%x-0x%x.\n",
1334                     comp_status, scsi_status);
1335
1336                 cp->result = DID_ERROR << 16;
1337                 break;
1338         }
1339
1340         /* Place command on done queue. */
1341         if (rsp->status_srb == NULL)
1342                 qla2x00_sp_compl(ha, sp);
1343 }
1344
1345 /**
1346  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1347  * @ha: SCSI driver HA context
1348  * @pkt: Entry pointer
1349  *
1350  * Extended sense data.
1351  */
1352 static void
1353 qla2x00_status_cont_entry(struct rsp_que *rsp, sts_cont_entry_t *pkt)
1354 {
1355         uint8_t         sense_sz = 0;
1356         struct qla_hw_data *ha = rsp->hw;
1357         srb_t           *sp = rsp->status_srb;
1358         struct scsi_cmnd *cp;
1359
1360         if (sp != NULL && sp->request_sense_length != 0) {
1361                 cp = sp->cmd;
1362                 if (cp == NULL) {
1363                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1364                             "sp=%p.\n", __func__, sp));
1365                         qla_printk(KERN_INFO, ha,
1366                             "cmd is NULL: already returned to OS (sp=%p)\n",
1367                             sp);
1368
1369                         rsp->status_srb = NULL;
1370                         return;
1371                 }
1372
1373                 if (sp->request_sense_length > sizeof(pkt->data)) {
1374                         sense_sz = sizeof(pkt->data);
1375                 } else {
1376                         sense_sz = sp->request_sense_length;
1377                 }
1378
1379                 /* Move sense data. */
1380                 if (IS_FWI2_CAPABLE(ha))
1381                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1382                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1383                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1384
1385                 sp->request_sense_ptr += sense_sz;
1386                 sp->request_sense_length -= sense_sz;
1387
1388                 /* Place command on done queue. */
1389                 if (sp->request_sense_length == 0) {
1390                         rsp->status_srb = NULL;
1391                         qla2x00_sp_compl(ha, sp);
1392                 }
1393         }
1394 }
1395
1396 /**
1397  * qla2x00_error_entry() - Process an error entry.
1398  * @ha: SCSI driver HA context
1399  * @pkt: Entry pointer
1400  */
1401 static void
1402 qla2x00_error_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, sts_entry_t *pkt)
1403 {
1404         srb_t *sp;
1405         struct qla_hw_data *ha = vha->hw;
1406         uint32_t handle = LSW(pkt->handle);
1407         uint16_t que = MSW(pkt->handle);
1408         struct req_que *req = ha->req_q_map[que];
1409 #if defined(QL_DEBUG_LEVEL_2)
1410         if (pkt->entry_status & RF_INV_E_ORDER)
1411                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1412         else if (pkt->entry_status & RF_INV_E_COUNT)
1413                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1414         else if (pkt->entry_status & RF_INV_E_PARAM)
1415                 qla_printk(KERN_ERR, ha,
1416                     "%s: Invalid Entry Parameter\n", __func__);
1417         else if (pkt->entry_status & RF_INV_E_TYPE)
1418                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1419         else if (pkt->entry_status & RF_BUSY)
1420                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1421         else
1422                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1423 #endif
1424
1425         /* Validate handle. */
1426         if (handle < MAX_OUTSTANDING_COMMANDS)
1427                 sp = req->outstanding_cmds[handle];
1428         else
1429                 sp = NULL;
1430
1431         if (sp) {
1432                 /* Free outstanding command slot. */
1433                 req->outstanding_cmds[handle] = NULL;
1434
1435                 /* Bad payload or header */
1436                 if (pkt->entry_status &
1437                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1438                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1439                         sp->cmd->result = DID_ERROR << 16;
1440                 } else if (pkt->entry_status & RF_BUSY) {
1441                         sp->cmd->result = DID_BUS_BUSY << 16;
1442                 } else {
1443                         sp->cmd->result = DID_ERROR << 16;
1444                 }
1445                 qla2x00_sp_compl(ha, sp);
1446
1447         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1448             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1449                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1450                     vha->host_no));
1451                 qla_printk(KERN_WARNING, ha,
1452                     "Error entry - invalid handle\n");
1453
1454                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1455                 qla2xxx_wake_dpc(vha);
1456         }
1457 }
1458
1459 /**
1460  * qla24xx_mbx_completion() - Process mailbox command completions.
1461  * @ha: SCSI driver HA context
1462  * @mb0: Mailbox0 register
1463  */
1464 static void
1465 qla24xx_mbx_completion(scsi_qla_host_t *vha, uint16_t mb0)
1466 {
1467         uint16_t        cnt;
1468         uint16_t __iomem *wptr;
1469         struct qla_hw_data *ha = vha->hw;
1470         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1471
1472         /* Load return mailbox registers. */
1473         ha->flags.mbox_int = 1;
1474         ha->mailbox_out[0] = mb0;
1475         wptr = (uint16_t __iomem *)&reg->mailbox1;
1476
1477         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1478                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1479                 wptr++;
1480         }
1481
1482         if (ha->mcp) {
1483                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1484                     __func__, vha->host_no, ha->mcp->mb[0]));
1485         } else {
1486                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1487                     __func__, vha->host_no));
1488         }
1489 }
1490
1491 /**
1492  * qla24xx_process_response_queue() - Process response queue entries.
1493  * @ha: SCSI driver HA context
1494  */
1495 void qla24xx_process_response_queue(struct scsi_qla_host *vha,
1496         struct rsp_que *rsp)
1497 {
1498         struct sts_entry_24xx *pkt;
1499
1500         if (!vha->flags.online)
1501                 return;
1502
1503         while (rsp->ring_ptr->signature != RESPONSE_PROCESSED) {
1504                 pkt = (struct sts_entry_24xx *)rsp->ring_ptr;
1505
1506                 rsp->ring_index++;
1507                 if (rsp->ring_index == rsp->length) {
1508                         rsp->ring_index = 0;
1509                         rsp->ring_ptr = rsp->ring;
1510                 } else {
1511                         rsp->ring_ptr++;
1512                 }
1513
1514                 if (pkt->entry_status != 0) {
1515                         DEBUG3(printk(KERN_INFO
1516                             "scsi(%ld): Process error entry.\n", vha->host_no));
1517
1518                         qla2x00_error_entry(vha, rsp, (sts_entry_t *) pkt);
1519                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1520                         wmb();
1521                         continue;
1522                 }
1523
1524                 switch (pkt->entry_type) {
1525                 case STATUS_TYPE:
1526                         qla2x00_status_entry(vha, rsp, pkt);
1527                         break;
1528                 case STATUS_CONT_TYPE:
1529                         qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
1530                         break;
1531                 case VP_RPT_ID_IOCB_TYPE:
1532                         qla24xx_report_id_acquisition(vha,
1533                             (struct vp_rpt_id_entry_24xx *)pkt);
1534                         break;
1535                 default:
1536                         /* Type Not Supported. */
1537                         DEBUG4(printk(KERN_WARNING
1538                             "scsi(%ld): Received unknown response pkt type %x "
1539                             "entry status=%x.\n",
1540                             vha->host_no, pkt->entry_type, pkt->entry_status));
1541                         break;
1542                 }
1543                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1544                 wmb();
1545         }
1546
1547         /* Adjust ring index */
1548         WRT_REG_DWORD(rsp->rsp_q_out, rsp->ring_index);
1549 }
1550
1551 static void
1552 qla2xxx_check_risc_status(scsi_qla_host_t *vha)
1553 {
1554         int rval;
1555         uint32_t cnt;
1556         struct qla_hw_data *ha = vha->hw;
1557         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1558
1559         if (!IS_QLA25XX(ha) && !IS_QLA81XX(ha))
1560                 return;
1561
1562         rval = QLA_SUCCESS;
1563         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1564         RD_REG_DWORD(&reg->iobase_addr);
1565         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1566         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1567             rval == QLA_SUCCESS; cnt--) {
1568                 if (cnt) {
1569                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1570                         udelay(10);
1571                 } else
1572                         rval = QLA_FUNCTION_TIMEOUT;
1573         }
1574         if (rval == QLA_SUCCESS)
1575                 goto next_test;
1576
1577         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1578         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1579             rval == QLA_SUCCESS; cnt--) {
1580                 if (cnt) {
1581                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1582                         udelay(10);
1583                 } else
1584                         rval = QLA_FUNCTION_TIMEOUT;
1585         }
1586         if (rval != QLA_SUCCESS)
1587                 goto done;
1588
1589 next_test:
1590         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1591                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1592
1593 done:
1594         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1595         RD_REG_DWORD(&reg->iobase_window);
1596 }
1597
1598 /**
1599  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1600  * @irq:
1601  * @dev_id: SCSI driver HA context
1602  *
1603  * Called by system whenever the host adapter generates an interrupt.
1604  *
1605  * Returns handled flag.
1606  */
1607 irqreturn_t
1608 qla24xx_intr_handler(int irq, void *dev_id)
1609 {
1610         scsi_qla_host_t *vha;
1611         struct qla_hw_data *ha;
1612         struct device_reg_24xx __iomem *reg;
1613         int             status;
1614         unsigned long   iter;
1615         uint32_t        stat;
1616         uint32_t        hccr;
1617         uint16_t        mb[4];
1618         struct rsp_que *rsp;
1619
1620         rsp = (struct rsp_que *) dev_id;
1621         if (!rsp) {
1622                 printk(KERN_INFO
1623                     "%s(): NULL response queue pointer\n", __func__);
1624                 return IRQ_NONE;
1625         }
1626
1627         ha = rsp->hw;
1628         reg = &ha->iobase->isp24;
1629         status = 0;
1630
1631         spin_lock(&ha->hardware_lock);
1632         vha = pci_get_drvdata(ha->pdev);
1633         for (iter = 50; iter--; ) {
1634                 stat = RD_REG_DWORD(&reg->host_status);
1635                 if (stat & HSRX_RISC_PAUSED) {
1636                         if (pci_channel_offline(ha->pdev))
1637                                 break;
1638
1639                         hccr = RD_REG_DWORD(&reg->hccr);
1640
1641                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1642                             "Dumping firmware!\n", hccr);
1643
1644                         qla2xxx_check_risc_status(vha);
1645
1646                         ha->isp_ops->fw_dump(vha, 1);
1647                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1648                         break;
1649                 } else if ((stat & HSRX_RISC_INT) == 0)
1650                         break;
1651
1652                 switch (stat & 0xff) {
1653                 case 0x1:
1654                 case 0x2:
1655                 case 0x10:
1656                 case 0x11:
1657                         qla24xx_mbx_completion(vha, MSW(stat));
1658                         status |= MBX_INTERRUPT;
1659
1660                         break;
1661                 case 0x12:
1662                         mb[0] = MSW(stat);
1663                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1664                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1665                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1666                         qla2x00_async_event(vha, rsp, mb);
1667                         break;
1668                 case 0x13:
1669                 case 0x14:
1670                         qla24xx_process_response_queue(vha, rsp);
1671                         break;
1672                 default:
1673                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1674                             "(%d).\n",
1675                             vha->host_no, stat & 0xff));
1676                         break;
1677                 }
1678                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1679                 RD_REG_DWORD_RELAXED(&reg->hccr);
1680         }
1681         spin_unlock(&ha->hardware_lock);
1682
1683         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1684             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1685                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1686                 complete(&ha->mbx_intr_comp);
1687         }
1688
1689         return IRQ_HANDLED;
1690 }
1691
1692 static irqreturn_t
1693 qla24xx_msix_rsp_q(int irq, void *dev_id)
1694 {
1695         struct qla_hw_data *ha;
1696         struct rsp_que *rsp;
1697         struct device_reg_24xx __iomem *reg;
1698         struct scsi_qla_host *vha;
1699
1700         rsp = (struct rsp_que *) dev_id;
1701         if (!rsp) {
1702                 printk(KERN_INFO
1703                 "%s(): NULL response queue pointer\n", __func__);
1704                 return IRQ_NONE;
1705         }
1706         ha = rsp->hw;
1707         reg = &ha->iobase->isp24;
1708
1709         spin_lock_irq(&ha->hardware_lock);
1710
1711         vha = qla25xx_get_host(rsp);
1712         qla24xx_process_response_queue(vha, rsp);
1713         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1714
1715         spin_unlock_irq(&ha->hardware_lock);
1716
1717         return IRQ_HANDLED;
1718 }
1719
1720 static irqreturn_t
1721 qla24xx_msix_default(int irq, void *dev_id)
1722 {
1723         scsi_qla_host_t *vha;
1724         struct qla_hw_data *ha;
1725         struct rsp_que *rsp;
1726         struct device_reg_24xx __iomem *reg;
1727         int             status;
1728         uint32_t        stat;
1729         uint32_t        hccr;
1730         uint16_t        mb[4];
1731
1732         rsp = (struct rsp_que *) dev_id;
1733         if (!rsp) {
1734                 DEBUG(printk(
1735                 "%s(): NULL response queue pointer\n", __func__));
1736                 return IRQ_NONE;
1737         }
1738         ha = rsp->hw;
1739         reg = &ha->iobase->isp24;
1740         status = 0;
1741
1742         spin_lock_irq(&ha->hardware_lock);
1743         vha = pci_get_drvdata(ha->pdev);
1744         do {
1745                 stat = RD_REG_DWORD(&reg->host_status);
1746                 if (stat & HSRX_RISC_PAUSED) {
1747                         if (pci_channel_offline(ha->pdev))
1748                                 break;
1749
1750                         hccr = RD_REG_DWORD(&reg->hccr);
1751
1752                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1753                             "Dumping firmware!\n", hccr);
1754
1755                         qla2xxx_check_risc_status(vha);
1756
1757                         ha->isp_ops->fw_dump(vha, 1);
1758                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1759                         break;
1760                 } else if ((stat & HSRX_RISC_INT) == 0)
1761                         break;
1762
1763                 switch (stat & 0xff) {
1764                 case 0x1:
1765                 case 0x2:
1766                 case 0x10:
1767                 case 0x11:
1768                         qla24xx_mbx_completion(vha, MSW(stat));
1769                         status |= MBX_INTERRUPT;
1770
1771                         break;
1772                 case 0x12:
1773                         mb[0] = MSW(stat);
1774                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1775                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1776                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1777                         qla2x00_async_event(vha, rsp, mb);
1778                         break;
1779                 case 0x13:
1780                 case 0x14:
1781                         qla24xx_process_response_queue(vha, rsp);
1782                         break;
1783                 default:
1784                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1785                             "(%d).\n",
1786                             vha->host_no, stat & 0xff));
1787                         break;
1788                 }
1789                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1790         } while (0);
1791         spin_unlock_irq(&ha->hardware_lock);
1792
1793         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1794             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1795                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1796                 complete(&ha->mbx_intr_comp);
1797         }
1798
1799         return IRQ_HANDLED;
1800 }
1801
1802 /* Interrupt handling helpers. */
1803
1804 struct qla_init_msix_entry {
1805         const char *name;
1806         irq_handler_t handler;
1807 };
1808
1809 static struct qla_init_msix_entry msix_entries[2] = {
1810         { "qla2xxx (default)", qla24xx_msix_default },
1811         { "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1812 };
1813
1814 static void
1815 qla24xx_disable_msix(struct qla_hw_data *ha)
1816 {
1817         int i;
1818         struct qla_msix_entry *qentry;
1819
1820         for (i = 0; i < ha->msix_count; i++) {
1821                 qentry = &ha->msix_entries[i];
1822                 if (qentry->have_irq)
1823                         free_irq(qentry->vector, qentry->rsp);
1824         }
1825         pci_disable_msix(ha->pdev);
1826         kfree(ha->msix_entries);
1827         ha->msix_entries = NULL;
1828         ha->flags.msix_enabled = 0;
1829 }
1830
1831 static int
1832 qla24xx_enable_msix(struct qla_hw_data *ha, struct rsp_que *rsp)
1833 {
1834 #define MIN_MSIX_COUNT  2
1835         int i, ret;
1836         struct msix_entry *entries;
1837         struct qla_msix_entry *qentry;
1838
1839         entries = kzalloc(sizeof(struct msix_entry) * ha->msix_count,
1840                                         GFP_KERNEL);
1841         if (!entries)
1842                 return -ENOMEM;
1843
1844         for (i = 0; i < ha->msix_count; i++)
1845                 entries[i].entry = i;
1846
1847         ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
1848         if (ret) {
1849                 if (ret < MIN_MSIX_COUNT)
1850                         goto msix_failed;
1851
1852                 qla_printk(KERN_WARNING, ha,
1853                         "MSI-X: Failed to enable support -- %d/%d\n"
1854                         " Retry with %d vectors\n", ha->msix_count, ret, ret);
1855                 ha->msix_count = ret;
1856                 ret = pci_enable_msix(ha->pdev, entries, ha->msix_count);
1857                 if (ret) {
1858 msix_failed:
1859                         qla_printk(KERN_WARNING, ha, "MSI-X: Failed to enable"
1860                                 " support, giving up -- %d/%d\n",
1861                                 ha->msix_count, ret);
1862                         goto msix_out;
1863                 }
1864                 ha->max_rsp_queues = ha->msix_count - 1;
1865         }
1866         ha->msix_entries = kzalloc(sizeof(struct qla_msix_entry) *
1867                                 ha->msix_count, GFP_KERNEL);
1868         if (!ha->msix_entries) {
1869                 ret = -ENOMEM;
1870                 goto msix_out;
1871         }
1872         ha->flags.msix_enabled = 1;
1873
1874         for (i = 0; i < ha->msix_count; i++) {
1875                 qentry = &ha->msix_entries[i];
1876                 qentry->vector = entries[i].vector;
1877                 qentry->entry = entries[i].entry;
1878                 qentry->have_irq = 0;
1879                 qentry->rsp = NULL;
1880         }
1881
1882         /* Enable MSI-X vectors for the base queue */
1883         for (i = 0; i < 2; i++) {
1884                 qentry = &ha->msix_entries[i];
1885                 ret = request_irq(qentry->vector, msix_entries[i].handler,
1886                                         0, msix_entries[i].name, rsp);
1887                 if (ret) {
1888                         qla_printk(KERN_WARNING, ha,
1889                         "MSI-X: Unable to register handler -- %x/%d.\n",
1890                         qentry->vector, ret);
1891                         qla24xx_disable_msix(ha);
1892                         ha->mqenable = 0;
1893                         goto msix_out;
1894                 }
1895                 qentry->have_irq = 1;
1896                 qentry->rsp = rsp;
1897                 rsp->msix = qentry;
1898         }
1899
1900         /* Enable MSI-X vector for response queue update for queue 0 */
1901         if (ha->mqiobase &&  (ha->max_rsp_queues > 1 || ha->max_req_queues > 1))
1902                 ha->mqenable = 1;
1903
1904 msix_out:
1905         kfree(entries);
1906         return ret;
1907 }
1908
1909 int
1910 qla2x00_request_irqs(struct qla_hw_data *ha, struct rsp_que *rsp)
1911 {
1912         int ret;
1913         device_reg_t __iomem *reg = ha->iobase;
1914
1915         /* If possible, enable MSI-X. */
1916         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) &&
1917             !IS_QLA8432(ha) && !IS_QLA8001(ha))
1918                 goto skip_msix;
1919
1920         if (IS_QLA2432(ha) && (ha->pdev->revision < QLA_MSIX_CHIP_REV_24XX ||
1921                 !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1922                 DEBUG2(qla_printk(KERN_WARNING, ha,
1923                 "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1924                         ha->pdev->revision, ha->fw_attributes));
1925
1926                 goto skip_msix;
1927         }
1928
1929         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1930             (ha->pdev->subsystem_device == 0x7040 ||
1931                 ha->pdev->subsystem_device == 0x7041 ||
1932                 ha->pdev->subsystem_device == 0x1705)) {
1933                 DEBUG2(qla_printk(KERN_WARNING, ha,
1934                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1935                     ha->pdev->subsystem_vendor,
1936                     ha->pdev->subsystem_device));
1937
1938                 goto skip_msi;
1939         }
1940
1941         ret = qla24xx_enable_msix(ha, rsp);
1942         if (!ret) {
1943                 DEBUG2(qla_printk(KERN_INFO, ha,
1944                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1945                     ha->fw_attributes));
1946                 goto clear_risc_ints;
1947         }
1948         qla_printk(KERN_WARNING, ha,
1949             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1950 skip_msix:
1951
1952         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha) &&
1953             !IS_QLA8001(ha))
1954                 goto skip_msi;
1955
1956         ret = pci_enable_msi(ha->pdev);
1957         if (!ret) {
1958                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1959                 ha->flags.msi_enabled = 1;
1960         }
1961 skip_msi:
1962
1963         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1964             IRQF_SHARED, QLA2XXX_DRIVER_NAME, rsp);
1965         if (ret) {
1966                 qla_printk(KERN_WARNING, ha,
1967                     "Failed to reserve interrupt %d already in use.\n",
1968                     ha->pdev->irq);
1969                 goto fail;
1970         }
1971         ha->flags.inta_enabled = 1;
1972 clear_risc_ints:
1973
1974         /*
1975          * FIXME: Noted that 8014s were being dropped during NK testing.
1976          * Timing deltas during MSI-X/INTa transitions?
1977          */
1978         if (IS_QLA81XX(ha))
1979                 goto fail;
1980         spin_lock_irq(&ha->hardware_lock);
1981         if (IS_FWI2_CAPABLE(ha)) {
1982                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1983                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1984         } else {
1985                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1986                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1987                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1988         }
1989         spin_unlock_irq(&ha->hardware_lock);
1990
1991 fail:
1992         return ret;
1993 }
1994
1995 void
1996 qla2x00_free_irqs(scsi_qla_host_t *vha)
1997 {
1998         struct qla_hw_data *ha = vha->hw;
1999         struct rsp_que *rsp = ha->rsp_q_map[0];
2000
2001         if (ha->flags.msix_enabled)
2002                 qla24xx_disable_msix(ha);
2003         else if (ha->flags.inta_enabled) {
2004                 free_irq(ha->pdev->irq, rsp);
2005                 pci_disable_msi(ha->pdev);
2006         }
2007 }
2008
2009
2010 int qla25xx_request_irq(struct rsp_que *rsp)
2011 {
2012         struct qla_hw_data *ha = rsp->hw;
2013         struct qla_init_msix_entry *intr = &msix_entries[2];
2014         struct qla_msix_entry *msix = rsp->msix;
2015         int ret;
2016
2017         ret = request_irq(msix->vector, intr->handler, 0, intr->name, rsp);
2018         if (ret) {
2019                 qla_printk(KERN_WARNING, ha,
2020                         "MSI-X: Unable to register handler -- %x/%d.\n",
2021                         msix->vector, ret);
2022                 return ret;
2023         }
2024         msix->have_irq = 1;
2025         msix->rsp = rsp;
2026         return ret;
2027 }
2028
2029 struct scsi_qla_host *
2030 qla25xx_get_host(struct rsp_que *rsp)
2031 {
2032         srb_t *sp;
2033         struct qla_hw_data *ha = rsp->hw;
2034         struct scsi_qla_host *vha = NULL;
2035         struct sts_entry_24xx *pkt;
2036         struct req_que *req;
2037         uint16_t que;
2038         uint32_t handle;
2039
2040         pkt = (struct sts_entry_24xx *) rsp->ring_ptr;
2041         que = MSW(pkt->handle);
2042         handle = (uint32_t) LSW(pkt->handle);
2043         req = ha->req_q_map[que];
2044         if (handle < MAX_OUTSTANDING_COMMANDS) {
2045                 sp = req->outstanding_cmds[handle];
2046                 if (sp)
2047                         return  sp->fcport->vha;
2048                 else
2049                         goto base_que;
2050         }
2051 base_que:
2052         vha = pci_get_drvdata(ha->pdev);
2053         return vha;
2054 }