err.no Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/delay.h>
  10 #include <scsi/scsi_tcq.h>
  11
  12 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  17 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  18
  19 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
  20
  21 /**
  22  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  23  * @irq:
  24  * @dev_id: SCSI driver HA context
  25  *
  26  * Called by system whenever the host adapter generates an interrupt.
  27  *
  28  * Returns handled flag.
  29  */
  30 irqreturn_t
  31 qla2100_intr_handler(int irq, void *dev_id)
  32 {
  33         scsi_qla_host_t *ha;
  34         struct device_reg_2xxx __iomem *reg;
  35         int             status;
  36         unsigned long   iter;
  37         uint16_t        hccr;
  38         uint16_t        mb[4];
  39
  40         ha = (scsi_qla_host_t *) dev_id;
  41         if (!ha) {
  42                 printk(KERN_INFO
  43                     "%s(): NULL host pointer\n", __func__);
  44                 return (IRQ_NONE);
  45         }
  46
  47         reg = &ha->iobase->isp;
  48         status = 0;
  49
  50         spin_lock(&ha->hardware_lock);
  51         for (iter = 50; iter--; ) {
  52                 hccr = RD_REG_WORD(&reg->hccr);
  53                 if (hccr & HCCR_RISC_PAUSE) {
  54                         if (pci_channel_offline(ha->pdev))
  55                                 break;
  56
  57                         /*
  58                          * Issue a "HARD" reset in order for the RISC interrupt
  59                          * bit to be cleared.  Schedule a big hammmer to get
  60                          * out of the RISC PAUSED state.
  61                          */
  62                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  63                         RD_REG_WORD(&reg->hccr);
  64
  65                         ha->isp_ops->fw_dump(ha, 1);
  66                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  67                         break;
  68                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  69                         break;
  70
  71                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  72                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  73                         RD_REG_WORD(&reg->hccr);
  74
  75                         /* Get mailbox data. */
  76                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  77                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  78                                 qla2x00_mbx_completion(ha, mb[0]);
  79                                 status |= MBX_INTERRUPT;
  80                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  81                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  82                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  83                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  84                                 qla2x00_async_event(ha, mb);
  85                         } else {
  86                                 /*EMPTY*/
  87                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  88                                     "interrupt type (%d).\n",
  89                                     ha->host_no, mb[0]));
  90                         }
  91                         /* Release mailbox registers. */
  92                         WRT_REG_WORD(&reg->semaphore, 0);
  93                         RD_REG_WORD(&reg->semaphore);
  94                 } else {
  95                         qla2x00_process_response_queue(ha);
  96
  97                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  98                         RD_REG_WORD(&reg->hccr);
  99                 }
 100         }
 101         spin_unlock(&ha->hardware_lock);
 102
 103         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 104             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 105                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 106                 complete(&ha->mbx_intr_comp);
 107         }
 108
 109         return (IRQ_HANDLED);
 110 }
 111
 112 /**
 113  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 114  * @irq:
 115  * @dev_id: SCSI driver HA context
 116  *
 117  * Called by system whenever the host adapter generates an interrupt.
 118  *
 119  * Returns handled flag.
 120  */
 121 irqreturn_t
 122 qla2300_intr_handler(int irq, void *dev_id)
 123 {
 124         scsi_qla_host_t *ha;
 125         struct device_reg_2xxx __iomem *reg;
 126         int             status;
 127         unsigned long   iter;
 128         uint32_t        stat;
 129         uint16_t        hccr;
 130         uint16_t        mb[4];
 131
 132         ha = (scsi_qla_host_t *) dev_id;
 133         if (!ha) {
 134                 printk(KERN_INFO
 135                     "%s(): NULL host pointer\n", __func__);
 136                 return (IRQ_NONE);
 137         }
 138
 139         reg = &ha->iobase->isp;
 140         status = 0;
 141
 142         spin_lock(&ha->hardware_lock);
 143         for (iter = 50; iter--; ) {
 144                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 145                 if (stat & HSR_RISC_PAUSED) {
 146                         if (pci_channel_offline(ha->pdev))
 147                                 break;
 148
 149                         hccr = RD_REG_WORD(&reg->hccr);
 150                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 151                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 152                                     "HCCR=%x, Dumping firmware!\n", hccr);
 153                         else
 154                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 155                                     "HCCR=%x, Dumping firmware!\n", hccr);
 156
 157                         /*
 158                          * Issue a "HARD" reset in order for the RISC
 159                          * interrupt bit to be cleared.  Schedule a big
 160                          * hammmer to get out of the RISC PAUSED state.
 161                          */
 162                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 163                         RD_REG_WORD(&reg->hccr);
 164
 165                         ha->isp_ops->fw_dump(ha, 1);
 166                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 167                         break;
 168                 } else if ((stat & HSR_RISC_INT) == 0)
 169                         break;
 170
 171                 switch (stat & 0xff) {
 172                 case 0x1:
 173                 case 0x2:
 174                 case 0x10:
 175                 case 0x11:
 176                         qla2x00_mbx_completion(ha, MSW(stat));
 177                         status |= MBX_INTERRUPT;
 178
 179                         /* Release mailbox registers. */
 180                         WRT_REG_WORD(&reg->semaphore, 0);
 181                         break;
 182                 case 0x12:
 183                         mb[0] = MSW(stat);
 184                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 185                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 186                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 187                         qla2x00_async_event(ha, mb);
 188                         break;
 189                 case 0x13:
 190                         qla2x00_process_response_queue(ha);
 191                         break;
 192                 case 0x15:
 193                         mb[0] = MBA_CMPLT_1_16BIT;
 194                         mb[1] = MSW(stat);
 195                         qla2x00_async_event(ha, mb);
 196                         break;
 197                 case 0x16:
 198                         mb[0] = MBA_SCSI_COMPLETION;
 199                         mb[1] = MSW(stat);
 200                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 201                         qla2x00_async_event(ha, mb);
 202                         break;
 203                 default:
 204                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 205                             "(%d).\n",
 206                             ha->host_no, stat & 0xff));
 207                         break;
 208                 }
 209                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 210                 RD_REG_WORD_RELAXED(&reg->hccr);
 211         }
 212         spin_unlock(&ha->hardware_lock);
 213
 214         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 215             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 216                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 217                 complete(&ha->mbx_intr_comp);
 218         }
 219
 220         return (IRQ_HANDLED);
 221 }
 222
 223 /**
 224  * qla2x00_mbx_completion() - Process mailbox command completions.
 225  * @ha: SCSI driver HA context
 226  * @mb0: Mailbox0 register
 227  */
 228 static void
 229 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 230 {
 231         uint16_t        cnt;
 232         uint16_t __iomem *wptr;
 233         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 234
 235         /* Load return mailbox registers. */
 236         ha->flags.mbox_int = 1;
 237         ha->mailbox_out[0] = mb0;
 238         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 239
 240         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 241                 if (IS_QLA2200(ha) && cnt == 8)
 242                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 243                 if (cnt == 4 || cnt == 5)
 244                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 245                 else
 246                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 247
 248                 wptr++;
 249         }
 250
 251         if (ha->mcp) {
 252                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 253                     __func__, ha->host_no, ha->mcp->mb[0]));
 254         } else {
 255                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 256                     __func__, ha->host_no));
 257         }
 258 }
 259
 260 /**
 261  * qla2x00_async_event() - Process aynchronous events.
 262  * @ha: SCSI driver HA context
 263  * @mb: Mailbox registers (0 - 3)
 264  */
 265 void
 266 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 267 {
 268 #define LS_UNKNOWN      2
 269         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 270         char            *link_speed;
 271         uint16_t        handle_cnt;
 272         uint16_t        cnt;
 273         uint32_t        handles[5];
 274         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 275         uint32_t        rscn_entry, host_pid;
 276         uint8_t         rscn_queue_index;
 277
 278         /* Setup to process RIO completion. */
 279         handle_cnt = 0;
 280         switch (mb[0]) {
 281         case MBA_SCSI_COMPLETION:
 282                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 283                 handle_cnt = 1;
 284                 break;
 285         case MBA_CMPLT_1_16BIT:
 286                 handles[0] = mb[1];
 287                 handle_cnt = 1;
 288                 mb[0] = MBA_SCSI_COMPLETION;
 289                 break;
 290         case MBA_CMPLT_2_16BIT:
 291                 handles[0] = mb[1];
 292                 handles[1] = mb[2];
 293                 handle_cnt = 2;
 294                 mb[0] = MBA_SCSI_COMPLETION;
 295                 break;
 296         case MBA_CMPLT_3_16BIT:
 297                 handles[0] = mb[1];
 298                 handles[1] = mb[2];
 299                 handles[2] = mb[3];
 300                 handle_cnt = 3;
 301                 mb[0] = MBA_SCSI_COMPLETION;
 302                 break;
 303         case MBA_CMPLT_4_16BIT:
 304                 handles[0] = mb[1];
 305                 handles[1] = mb[2];
 306                 handles[2] = mb[3];
 307                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 308                 handle_cnt = 4;
 309                 mb[0] = MBA_SCSI_COMPLETION;
 310                 break;
 311         case MBA_CMPLT_5_16BIT:
 312                 handles[0] = mb[1];
 313                 handles[1] = mb[2];
 314                 handles[2] = mb[3];
 315                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 316                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 317                 handle_cnt = 5;
 318                 mb[0] = MBA_SCSI_COMPLETION;
 319                 break;
 320         case MBA_CMPLT_2_32BIT:
 321                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 322                 handles[1] = le32_to_cpu(
 323                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 324                     RD_MAILBOX_REG(ha, reg, 6));
 325                 handle_cnt = 2;
 326                 mb[0] = MBA_SCSI_COMPLETION;
 327                 break;
 328         default:
 329                 break;
 330         }
 331
 332         switch (mb[0]) {
 333         case MBA_SCSI_COMPLETION:       /* Fast Post */
 334                 if (!ha->flags.online)
 335                         break;
 336
 337                 for (cnt = 0; cnt < handle_cnt; cnt++)
 338                         qla2x00_process_completed_request(ha, handles[cnt]);
 339                 break;
 340
 341         case MBA_RESET:                 /* Reset */
 342                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 343
 344                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 345                 break;
 346
 347         case MBA_SYSTEM_ERR:            /* System Error */
 348                 qla_printk(KERN_INFO, ha,
 349                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 350                     mb[1], mb[2], mb[3]);
 351
 352                 ha->isp_ops->fw_dump(ha, 1);
 353
 354                 if (IS_FWI2_CAPABLE(ha)) {
 355                         if (mb[1] == 0 && mb[2] == 0) {
 356                                 qla_printk(KERN_ERR, ha,
 357                                     "Unrecoverable Hardware Error: adapter "
 358                                     "marked OFFLINE!\n");
 359                                 ha->flags.online = 0;
 360                         } else
 361                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 362                 } else if (mb[1] == 0) {
 363                         qla_printk(KERN_INFO, ha,
 364                             "Unrecoverable Hardware Error: adapter marked "
 365                             "OFFLINE!\n");
 366                         ha->flags.online = 0;
 367                 } else
 368                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 369                 break;
 370
 371         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 372                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 373                     ha->host_no));
 374                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 375
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 380                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 381                     ha->host_no));
 382                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 383
 384                 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                 case MS_IOCB_TYPE:
 810                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 811                         break;
 812                 default:
 813                         /* Type Not Supported. */
 814                         DEBUG4(printk(KERN_WARNING
 815                             "scsi(%ld): Received unknown response pkt type %x "
 816                             "entry status=%x.\n",
 817                             ha->host_no, pkt->entry_type, pkt->entry_status));
 818                         break;
 819                 }
 820                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 821                 wmb();
 822         }
 823
 824         /* Adjust ring index */
 825         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 826 }
 827
 828 static inline void
 829 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 830 {
 831         struct scsi_cmnd *cp = sp->cmd;
 832
 833         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 834                 sense_len = SCSI_SENSE_BUFFERSIZE;
 835
 836         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 837         sp->request_sense_length = sense_len;
 838         sp->request_sense_ptr = cp->sense_buffer;
 839         if (sp->request_sense_length > 32)
 840                 sense_len = 32;
 841
 842         memcpy(cp->sense_buffer, sense_data, sense_len);
 843
 844         sp->request_sense_ptr += sense_len;
 845         sp->request_sense_length -= sense_len;
 846         if (sp->request_sense_length != 0)
 847                 sp->ha->status_srb = sp;
 848
 849         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 850             "cmd=%p pid=%ld\n", __func__, sp->ha->host_no, cp->device->channel,
 851             cp->device->id, cp->device->lun, cp, cp->serial_number));
 852         if (sense_len)
 853                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 854                     CMD_ACTUAL_SNSLEN(cp)));
 855 }
 856
 857 /**
 858  * qla2x00_status_entry() - Process a Status IOCB entry.
 859  * @ha: SCSI driver HA context
 860  * @pkt: Entry pointer
 861  */
 862 static void
 863 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 864 {
 865         srb_t           *sp;
 866         fc_port_t       *fcport;
 867         struct scsi_cmnd *cp;
 868         sts_entry_t *sts;
 869         struct sts_entry_24xx *sts24;
 870         uint16_t        comp_status;
 871         uint16_t        scsi_status;
 872         uint8_t         lscsi_status;
 873         int32_t         resid;
 874         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 875         uint8_t         *rsp_info, *sense_data;
 876
 877         sts = (sts_entry_t *) pkt;
 878         sts24 = (struct sts_entry_24xx *) pkt;
 879         if (IS_FWI2_CAPABLE(ha)) {
 880                 comp_status = le16_to_cpu(sts24->comp_status);
 881                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 882         } else {
 883                 comp_status = le16_to_cpu(sts->comp_status);
 884                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 885         }
 886
 887         /* Fast path completion. */
 888         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 889                 qla2x00_process_completed_request(ha, sts->handle);
 890
 891                 return;
 892         }
 893
 894         /* Validate handle. */
 895         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 896                 sp = ha->outstanding_cmds[sts->handle];
 897                 ha->outstanding_cmds[sts->handle] = NULL;
 898         } else
 899                 sp = NULL;
 900
 901         if (sp == NULL) {
 902                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 903                     ha->host_no));
 904                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 905
 906                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 907                 qla2xxx_wake_dpc(ha);
 908                 return;
 909         }
 910         cp = sp->cmd;
 911         if (cp == NULL) {
 912                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 913                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 914                 qla_printk(KERN_WARNING, ha,
 915                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 916
 917                 return;
 918         }
 919
 920         lscsi_status = scsi_status & STATUS_MASK;
 921         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 922         CMD_COMPL_STATUS(cp) = comp_status;
 923         CMD_SCSI_STATUS(cp) = scsi_status;
 924
 925         fcport = sp->fcport;
 926
 927         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 928         if (IS_FWI2_CAPABLE(ha)) {
 929                 sense_len = le32_to_cpu(sts24->sense_len);
 930                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 931                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 932                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 933                 rsp_info = sts24->data;
 934                 sense_data = sts24->data;
 935                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 936         } else {
 937                 sense_len = le16_to_cpu(sts->req_sense_length);
 938                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 939                 resid_len = le32_to_cpu(sts->residual_length);
 940                 rsp_info = sts->rsp_info;
 941                 sense_data = sts->req_sense_data;
 942         }
 943
 944         /* Check for any FCP transport errors. */
 945         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 946                 /* Sense data lies beyond any FCP RESPONSE data. */
 947                 if (IS_FWI2_CAPABLE(ha))
 948                         sense_data += rsp_info_len;
 949                 if (rsp_info_len > 3 && rsp_info[3]) {
 950                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 951                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 952                             "retrying command\n", ha->host_no,
 953                             cp->device->channel, cp->device->id,
 954                             cp->device->lun, rsp_info_len, rsp_info[0],
 955                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 956                             rsp_info[5], rsp_info[6], rsp_info[7]));
 957
 958                         cp->result = DID_BUS_BUSY << 16;
 959                         qla2x00_sp_compl(ha, sp);
 960                         return;
 961                 }
 962         }
 963
 964         /* Check for overrun. */
 965         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
 966             scsi_status & SS_RESIDUAL_OVER)
 967                 comp_status = CS_DATA_OVERRUN;
 968
 969         /*
 970          * Based on Host and scsi status generate status code for Linux
 971          */
 972         switch (comp_status) {
 973         case CS_COMPLETE:
 974         case CS_QUEUE_FULL:
 975                 if (scsi_status == 0) {
 976                         cp->result = DID_OK << 16;
 977                         break;
 978                 }
 979                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 980                         resid = resid_len;
 981                         scsi_set_resid(cp, resid);
 982                         CMD_RESID_LEN(cp) = resid;
 983
 984                         if (!lscsi_status &&
 985                             ((unsigned)(scsi_bufflen(cp) - resid) <
 986                              cp->underflow)) {
 987                                 qla_printk(KERN_INFO, ha,
 988                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 989                                            "detected (%x of %x bytes)...returning "
 990                                            "error status.\n", ha->host_no,
 991                                            cp->device->channel, cp->device->id,
 992                                            cp->device->lun, resid,
 993                                            scsi_bufflen(cp));
 994
 995                                 cp->result = DID_ERROR << 16;
 996                                 break;
 997                         }
 998                 }
 999                 cp->result = DID_OK << 16 | lscsi_status;
1000
1001                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1002                         DEBUG2(printk(KERN_INFO
1003                             "scsi(%ld): QUEUE FULL status detected "
1004                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1005                             scsi_status));
1006
1007                         /* Adjust queue depth for all luns on the port. */
1008                         fcport->last_queue_full = jiffies;
1009                         starget_for_each_device(cp->device->sdev_target,
1010                             fcport, qla2x00_adjust_sdev_qdepth_down);
1011                         break;
1012                 }
1013                 if (lscsi_status != SS_CHECK_CONDITION)
1014                         break;
1015
1016                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1017                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1018                         break;
1019
1020                 qla2x00_handle_sense(sp, sense_data, sense_len);
1021                 break;
1022
1023         case CS_DATA_UNDERRUN:
1024                 resid = resid_len;
1025                 /* Use F/W calculated residual length. */
1026                 if (IS_FWI2_CAPABLE(ha)) {
1027                         if (scsi_status & SS_RESIDUAL_UNDER &&
1028                             resid != fw_resid_len) {
1029                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1030                                 lscsi_status = 0;
1031                         }
1032                         resid = fw_resid_len;
1033                 }
1034
1035                 if (scsi_status & SS_RESIDUAL_UNDER) {
1036                         scsi_set_resid(cp, resid);
1037                         CMD_RESID_LEN(cp) = resid;
1038                 } else {
1039                         DEBUG2(printk(KERN_INFO
1040                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1041                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1042                             "os_underflow=0x%x\n", ha->host_no,
1043                             cp->device->id, cp->device->lun, comp_status,
1044                             scsi_status, resid_len, resid, cp->cmnd[0],
1045                             cp->underflow));
1046
1047                 }
1048
1049                 /*
1050                  * Check to see if SCSI Status is non zero. If so report SCSI
1051                  * Status.
1052                  */
1053                 if (lscsi_status != 0) {
1054                         cp->result = DID_OK << 16 | lscsi_status;
1055
1056                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1057                                 DEBUG2(printk(KERN_INFO
1058                                     "scsi(%ld): QUEUE FULL status detected "
1059                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1060                                     scsi_status));
1061
1062                                 /*
1063                                  * Adjust queue depth for all luns on the
1064                                  * port.
1065                                  */
1066                                 fcport->last_queue_full = jiffies;
1067                                 starget_for_each_device(
1068                                     cp->device->sdev_target, fcport,
1069                                     qla2x00_adjust_sdev_qdepth_down);
1070                                 break;
1071                         }
1072                         if (lscsi_status != SS_CHECK_CONDITION)
1073                                 break;
1074
1075                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1076                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1077                                 break;
1078
1079                         qla2x00_handle_sense(sp, sense_data, sense_len);
1080
1081                         /*
1082                          * In case of a Underrun condition, set both the lscsi
1083                          * status and the completion status to appropriate
1084                          * values.
1085                          */
1086                         if (resid &&
1087                             ((unsigned)(scsi_bufflen(cp) - resid) <
1088                              cp->underflow)) {
1089                                 DEBUG2(qla_printk(KERN_INFO, ha,
1090                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1091                                     "detected (%x of %x bytes)...returning "
1092                                     "error status.\n", ha->host_no,
1093                                     cp->device->channel, cp->device->id,
1094                                     cp->device->lun, resid,
1095                                     scsi_bufflen(cp)));
1096
1097                                 cp->result = DID_ERROR << 16 | lscsi_status;
1098                         }
1099                 } else {
1100                         /*
1101                          * If RISC reports underrun and target does not report
1102                          * it then we must have a lost frame, so tell upper
1103                          * layer to retry it by reporting a bus busy.
1104                          */
1105                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1106                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1107                                               "frame(s) detected (%x of %x bytes)..."
1108                                               "retrying command.\n", ha->host_no,
1109                                               cp->device->channel, cp->device->id,
1110                                               cp->device->lun, resid,
1111                                               scsi_bufflen(cp)));
1112
1113                                 cp->result = DID_BUS_BUSY << 16;
1114                                 break;
1115                         }
1116
1117                         /* Handle mid-layer underflow */
1118                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1119                             cp->underflow) {
1120                                 qla_printk(KERN_INFO, ha,
1121                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1122                                            "detected (%x of %x bytes)...returning "
1123                                            "error status.\n", ha->host_no,
1124                                            cp->device->channel, cp->device->id,
1125                                            cp->device->lun, resid,
1126                                            scsi_bufflen(cp));
1127
1128                                 cp->result = DID_ERROR << 16;
1129                                 break;
1130                         }
1131
1132                         /* Everybody online, looking good... */
1133                         cp->result = DID_OK << 16;
1134                 }
1135                 break;
1136
1137         case CS_DATA_OVERRUN:
1138                 DEBUG2(printk(KERN_INFO
1139                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1140                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1141                     scsi_status));
1142                 DEBUG2(printk(KERN_INFO
1143                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1144                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1145                     cp->cmnd[4], cp->cmnd[5]));
1146                 DEBUG2(printk(KERN_INFO
1147                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1148                     "status!\n",
1149                     cp->serial_number, scsi_bufflen(cp), resid_len));
1150
1151                 cp->result = DID_ERROR << 16;
1152                 break;
1153
1154         case CS_PORT_LOGGED_OUT:
1155         case CS_PORT_CONFIG_CHG:
1156         case CS_PORT_BUSY:
1157         case CS_INCOMPLETE:
1158         case CS_PORT_UNAVAILABLE:
1159                 /*
1160                  * If the port is in Target Down state, return all IOs for this
1161                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1162                  * retry_queue.
1163                  */
1164                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1165                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1166                     ha->host_no, cp->device->id, cp->device->lun,
1167                     cp->serial_number, comp_status,
1168                     atomic_read(&fcport->state)));
1169
1170                 cp->result = DID_BUS_BUSY << 16;
1171                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1172                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1173                 }
1174                 break;
1175
1176         case CS_RESET:
1177                 DEBUG2(printk(KERN_INFO
1178                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1179                     ha->host_no, comp_status, scsi_status));
1180
1181                 cp->result = DID_RESET << 16;
1182                 break;
1183
1184         case CS_ABORTED:
1185                 /*
1186                  * hv2.19.12 - DID_ABORT does not retry the request if we
1187                  * aborted this request then abort otherwise it must be a
1188                  * reset.
1189                  */
1190                 DEBUG2(printk(KERN_INFO
1191                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1192                     ha->host_no, comp_status, scsi_status));
1193
1194                 cp->result = DID_RESET << 16;
1195                 break;
1196
1197         case CS_TIMEOUT:
1198                 cp->result = DID_BUS_BUSY << 16;
1199
1200                 if (IS_FWI2_CAPABLE(ha)) {
1201                         DEBUG2(printk(KERN_INFO
1202                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1203                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1204                             cp->device->id, cp->device->lun, comp_status,
1205                             scsi_status));
1206                         break;
1207                 }
1208                 DEBUG2(printk(KERN_INFO
1209                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1210                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1211                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1212                     le16_to_cpu(sts->status_flags)));
1213
1214                 /* Check to see if logout occurred. */
1215                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1216                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1217                 break;
1218
1219         default:
1220                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1221                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1222                 qla_printk(KERN_INFO, ha,
1223                     "Unknown status detected 0x%x-0x%x.\n",
1224                     comp_status, scsi_status);
1225
1226                 cp->result = DID_ERROR << 16;
1227                 break;
1228         }
1229
1230         /* Place command on done queue. */
1231         if (ha->status_srb == NULL)
1232                 qla2x00_sp_compl(ha, sp);
1233 }
1234
1235 /**
1236  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1237  * @ha: SCSI driver HA context
1238  * @pkt: Entry pointer
1239  *
1240  * Extended sense data.
1241  */
1242 static void
1243 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1244 {
1245         uint8_t         sense_sz = 0;
1246         srb_t           *sp = ha->status_srb;
1247         struct scsi_cmnd *cp;
1248
1249         if (sp != NULL && sp->request_sense_length != 0) {
1250                 cp = sp->cmd;
1251                 if (cp == NULL) {
1252                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1253                             "sp=%p.\n", __func__, sp));
1254                         qla_printk(KERN_INFO, ha,
1255                             "cmd is NULL: already returned to OS (sp=%p)\n",
1256                             sp);
1257
1258                         ha->status_srb = NULL;
1259                         return;
1260                 }
1261
1262                 if (sp->request_sense_length > sizeof(pkt->data)) {
1263                         sense_sz = sizeof(pkt->data);
1264                 } else {
1265                         sense_sz = sp->request_sense_length;
1266                 }
1267
1268                 /* Move sense data. */
1269                 if (IS_FWI2_CAPABLE(ha))
1270                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1271                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1272                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1273
1274                 sp->request_sense_ptr += sense_sz;
1275                 sp->request_sense_length -= sense_sz;
1276
1277                 /* Place command on done queue. */
1278                 if (sp->request_sense_length == 0) {
1279                         ha->status_srb = NULL;
1280                         qla2x00_sp_compl(ha, sp);
1281                 }
1282         }
1283 }
1284
1285 /**
1286  * qla2x00_error_entry() - Process an error entry.
1287  * @ha: SCSI driver HA context
1288  * @pkt: Entry pointer
1289  */
1290 static void
1291 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1292 {
1293         srb_t *sp;
1294
1295 #if defined(QL_DEBUG_LEVEL_2)
1296         if (pkt->entry_status & RF_INV_E_ORDER)
1297                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1298         else if (pkt->entry_status & RF_INV_E_COUNT)
1299                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1300         else if (pkt->entry_status & RF_INV_E_PARAM)
1301                 qla_printk(KERN_ERR, ha,
1302                     "%s: Invalid Entry Parameter\n", __func__);
1303         else if (pkt->entry_status & RF_INV_E_TYPE)
1304                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1305         else if (pkt->entry_status & RF_BUSY)
1306                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1307         else
1308                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1309 #endif
1310
1311         /* Validate handle. */
1312         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1313                 sp = ha->outstanding_cmds[pkt->handle];
1314         else
1315                 sp = NULL;
1316
1317         if (sp) {
1318                 /* Free outstanding command slot. */
1319                 ha->outstanding_cmds[pkt->handle] = NULL;
1320
1321                 /* Bad payload or header */
1322                 if (pkt->entry_status &
1323                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1324                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1325                         sp->cmd->result = DID_ERROR << 16;
1326                 } else if (pkt->entry_status & RF_BUSY) {
1327                         sp->cmd->result = DID_BUS_BUSY << 16;
1328                 } else {
1329                         sp->cmd->result = DID_ERROR << 16;
1330                 }
1331                 qla2x00_sp_compl(ha, sp);
1332
1333         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1334             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1335                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1336                     ha->host_no));
1337                 qla_printk(KERN_WARNING, ha,
1338                     "Error entry - invalid handle\n");
1339
1340                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1341                 qla2xxx_wake_dpc(ha);
1342         }
1343 }
1344
1345 /**
1346  * qla2x00_ms_entry() - Process a Management Server entry.
1347  * @ha: SCSI driver HA context
1348  * @index: Response queue out pointer
1349  */
1350 static void
1351 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1352 {
1353         srb_t          *sp;
1354
1355         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1356             __func__, ha->host_no, pkt, pkt->handle1));
1357
1358         /* Validate handle. */
1359         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1360                 sp = ha->outstanding_cmds[pkt->handle1];
1361         else
1362                 sp = NULL;
1363
1364         if (sp == NULL) {
1365                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1366                     ha->host_no));
1367                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1368
1369                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1370                 return;
1371         }
1372
1373         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1374         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1375
1376         /* Free outstanding command slot. */
1377         ha->outstanding_cmds[pkt->handle1] = NULL;
1378
1379         qla2x00_sp_compl(ha, sp);
1380 }
1381
1382
1383 /**
1384  * qla24xx_mbx_completion() - Process mailbox command completions.
1385  * @ha: SCSI driver HA context
1386  * @mb0: Mailbox0 register
1387  */
1388 static void
1389 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1390 {
1391         uint16_t        cnt;
1392         uint16_t __iomem *wptr;
1393         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1394
1395         /* Load return mailbox registers. */
1396         ha->flags.mbox_int = 1;
1397         ha->mailbox_out[0] = mb0;
1398         wptr = (uint16_t __iomem *)&reg->mailbox1;
1399
1400         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1401                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1402                 wptr++;
1403         }
1404
1405         if (ha->mcp) {
1406                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1407                     __func__, ha->host_no, ha->mcp->mb[0]));
1408         } else {
1409                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1410                     __func__, ha->host_no));
1411         }
1412 }
1413
1414 /**
1415  * qla24xx_process_response_queue() - Process response queue entries.
1416  * @ha: SCSI driver HA context
1417  */
1418 void
1419 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1420 {
1421         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1422         struct sts_entry_24xx *pkt;
1423
1424         if (!ha->flags.online)
1425                 return;
1426
1427         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1428                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1429
1430                 ha->rsp_ring_index++;
1431                 if (ha->rsp_ring_index == ha->response_q_length) {
1432                         ha->rsp_ring_index = 0;
1433                         ha->response_ring_ptr = ha->response_ring;
1434                 } else {
1435                         ha->response_ring_ptr++;
1436                 }
1437
1438                 if (pkt->entry_status != 0) {
1439                         DEBUG3(printk(KERN_INFO
1440                             "scsi(%ld): Process error entry.\n", ha->host_no));
1441
1442                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1443                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1444                         wmb();
1445                         continue;
1446                 }
1447
1448                 switch (pkt->entry_type) {
1449                 case STATUS_TYPE:
1450                         qla2x00_status_entry(ha, pkt);
1451                         break;
1452                 case STATUS_CONT_TYPE:
1453                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1454                         break;
1455                 case MS_IOCB_TYPE:
1456                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1457                         break;
1458                 case VP_RPT_ID_IOCB_TYPE:
1459                         qla24xx_report_id_acquisition(ha,
1460                             (struct vp_rpt_id_entry_24xx *)pkt);
1461                         break;
1462                 default:
1463                         /* Type Not Supported. */
1464                         DEBUG4(printk(KERN_WARNING
1465                             "scsi(%ld): Received unknown response pkt type %x "
1466                             "entry status=%x.\n",
1467                             ha->host_no, pkt->entry_type, pkt->entry_status));
1468                         break;
1469                 }
1470                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1471                 wmb();
1472         }
1473
1474         /* Adjust ring index */
1475         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1476 }
1477
1478 static void
1479 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1480 {
1481         int rval;
1482         uint32_t cnt;
1483         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1484
1485         if (!IS_QLA25XX(ha))
1486                 return;
1487
1488         rval = QLA_SUCCESS;
1489         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1490         RD_REG_DWORD(&reg->iobase_addr);
1491         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1492         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1493             rval == QLA_SUCCESS; cnt--) {
1494                 if (cnt) {
1495                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1496                         udelay(10);
1497                 } else
1498                         rval = QLA_FUNCTION_TIMEOUT;
1499         }
1500         if (rval == QLA_SUCCESS)
1501                 goto next_test;
1502
1503         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1504         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1505             rval == QLA_SUCCESS; cnt--) {
1506                 if (cnt) {
1507                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1508                         udelay(10);
1509                 } else
1510                         rval = QLA_FUNCTION_TIMEOUT;
1511         }
1512         if (rval != QLA_SUCCESS)
1513                 goto done;
1514
1515 next_test:
1516         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1517                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1518
1519 done:
1520         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1521         RD_REG_DWORD(&reg->iobase_window);
1522 }
1523
1524 /**
1525  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1526  * @irq:
1527  * @dev_id: SCSI driver HA context
1528  *
1529  * Called by system whenever the host adapter generates an interrupt.
1530  *
1531  * Returns handled flag.
1532  */
1533 irqreturn_t
1534 qla24xx_intr_handler(int irq, void *dev_id)
1535 {
1536         scsi_qla_host_t *ha;
1537         struct device_reg_24xx __iomem *reg;
1538         int             status;
1539         unsigned long   iter;
1540         uint32_t        stat;
1541         uint32_t        hccr;
1542         uint16_t        mb[4];
1543
1544         ha = (scsi_qla_host_t *) dev_id;
1545         if (!ha) {
1546                 printk(KERN_INFO
1547                     "%s(): NULL host pointer\n", __func__);
1548                 return IRQ_NONE;
1549         }
1550
1551         reg = &ha->iobase->isp24;
1552         status = 0;
1553
1554         spin_lock(&ha->hardware_lock);
1555         for (iter = 50; iter--; ) {
1556                 stat = RD_REG_DWORD(&reg->host_status);
1557                 if (stat & HSRX_RISC_PAUSED) {
1558                         if (pci_channel_offline(ha->pdev))
1559                                 break;
1560
1561                         hccr = RD_REG_DWORD(&reg->hccr);
1562
1563                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1564                             "Dumping firmware!\n", hccr);
1565
1566                         qla2xxx_check_risc_status(ha);
1567
1568                         ha->isp_ops->fw_dump(ha, 1);
1569                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1570                         break;
1571                 } else if ((stat & HSRX_RISC_INT) == 0)
1572                         break;
1573
1574                 switch (stat & 0xff) {
1575                 case 0x1:
1576                 case 0x2:
1577                 case 0x10:
1578                 case 0x11:
1579                         qla24xx_mbx_completion(ha, MSW(stat));
1580                         status |= MBX_INTERRUPT;
1581
1582                         break;
1583                 case 0x12:
1584                         mb[0] = MSW(stat);
1585                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1586                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1587                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1588                         qla2x00_async_event(ha, mb);
1589                         break;
1590                 case 0x13:
1591                         qla24xx_process_response_queue(ha);
1592                         break;
1593                 default:
1594                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1595                             "(%d).\n",
1596                             ha->host_no, stat & 0xff));
1597                         break;
1598                 }
1599                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1600                 RD_REG_DWORD_RELAXED(&reg->hccr);
1601         }
1602         spin_unlock(&ha->hardware_lock);
1603
1604         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1605             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1606                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1607                 complete(&ha->mbx_intr_comp);
1608         }
1609
1610         return IRQ_HANDLED;
1611 }
1612
1613 /**
1614  * qla24xx_ms_entry() - Process a Management Server entry.
1615  * @ha: SCSI driver HA context
1616  * @index: Response queue out pointer
1617  */
1618 static void
1619 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1620 {
1621         srb_t          *sp;
1622
1623         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1624             __func__, ha->host_no, pkt, pkt->handle));
1625
1626         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1627         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1628
1629         /* Validate handle. */
1630         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1631                 sp = ha->outstanding_cmds[pkt->handle];
1632         else
1633                 sp = NULL;
1634
1635         if (sp == NULL) {
1636                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1637                     ha->host_no));
1638                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1639                     ha->host_no));
1640                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1641                     pkt->handle);
1642
1643                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1644                 return;
1645         }
1646
1647         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1648         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1649
1650         /* Free outstanding command slot. */
1651         ha->outstanding_cmds[pkt->handle] = NULL;
1652
1653         qla2x00_sp_compl(ha, sp);
1654 }
1655
1656 static irqreturn_t
1657 qla24xx_msix_rsp_q(int irq, void *dev_id)
1658 {
1659         scsi_qla_host_t *ha;
1660         struct device_reg_24xx __iomem *reg;
1661
1662         ha = dev_id;
1663         reg = &ha->iobase->isp24;
1664
1665         spin_lock(&ha->hardware_lock);
1666
1667         qla24xx_process_response_queue(ha);
1668         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1669
1670         spin_unlock(&ha->hardware_lock);
1671
1672         return IRQ_HANDLED;
1673 }
1674
1675 static irqreturn_t
1676 qla24xx_msix_default(int irq, void *dev_id)
1677 {
1678         scsi_qla_host_t *ha;
1679         struct device_reg_24xx __iomem *reg;
1680         int             status;
1681         uint32_t        stat;
1682         uint32_t        hccr;
1683         uint16_t        mb[4];
1684
1685         ha = dev_id;
1686         reg = &ha->iobase->isp24;
1687         status = 0;
1688
1689         spin_lock(&ha->hardware_lock);
1690         do {
1691                 stat = RD_REG_DWORD(&reg->host_status);
1692                 if (stat & HSRX_RISC_PAUSED) {
1693                         if (pci_channel_offline(ha->pdev))
1694                                 break;
1695
1696                         hccr = RD_REG_DWORD(&reg->hccr);
1697
1698                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1699                             "Dumping firmware!\n", hccr);
1700
1701                         qla2xxx_check_risc_status(ha);
1702
1703                         ha->isp_ops->fw_dump(ha, 1);
1704                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1705                         break;
1706                 } else if ((stat & HSRX_RISC_INT) == 0)
1707                         break;
1708
1709                 switch (stat & 0xff) {
1710                 case 0x1:
1711                 case 0x2:
1712                 case 0x10:
1713                 case 0x11:
1714                         qla24xx_mbx_completion(ha, MSW(stat));
1715                         status |= MBX_INTERRUPT;
1716
1717                         break;
1718                 case 0x12:
1719                         mb[0] = MSW(stat);
1720                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1721                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1722                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1723                         qla2x00_async_event(ha, mb);
1724                         break;
1725                 case 0x13:
1726                         qla24xx_process_response_queue(ha);
1727                         break;
1728                 default:
1729                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1730                             "(%d).\n",
1731                             ha->host_no, stat & 0xff));
1732                         break;
1733                 }
1734                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1735         } while (0);
1736         spin_unlock(&ha->hardware_lock);
1737
1738         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1739             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1740                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1741                 complete(&ha->mbx_intr_comp);
1742         }
1743
1744         return IRQ_HANDLED;
1745 }
1746
1747 /* Interrupt handling helpers. */
1748
1749 struct qla_init_msix_entry {
1750         uint16_t entry;
1751         uint16_t index;
1752         const char *name;
1753         irq_handler_t handler;
1754 };
1755
1756 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1757         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1758                 "qla2xxx (default)", qla24xx_msix_default },
1759
1760         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1761                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1762 };
1763
1764 static void
1765 qla24xx_disable_msix(scsi_qla_host_t *ha)
1766 {
1767         int i;
1768         struct qla_msix_entry *qentry;
1769
1770         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1771                 qentry = &ha->msix_entries[imsix_entries[i].index];
1772                 if (qentry->have_irq)
1773                         free_irq(qentry->msix_vector, ha);
1774         }
1775         pci_disable_msix(ha->pdev);
1776 }
1777
1778 static int
1779 qla24xx_enable_msix(scsi_qla_host_t *ha)
1780 {
1781         int i, ret;
1782         struct msix_entry entries[QLA_MSIX_ENTRIES];
1783         struct qla_msix_entry *qentry;
1784
1785         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1786                 entries[i].entry = imsix_entries[i].entry;
1787
1788         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1789         if (ret) {
1790                 qla_printk(KERN_WARNING, ha,
1791                     "MSI-X: Failed to enable support -- %d/%d\n",
1792                     QLA_MSIX_ENTRIES, ret);
1793                 goto msix_out;
1794         }
1795         ha->flags.msix_enabled = 1;
1796
1797         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1798                 qentry = &ha->msix_entries[imsix_entries[i].index];
1799                 qentry->msix_vector = entries[i].vector;
1800                 qentry->msix_entry = entries[i].entry;
1801                 qentry->have_irq = 0;
1802                 ret = request_irq(qentry->msix_vector,
1803                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1804                 if (ret) {
1805                         qla_printk(KERN_WARNING, ha,
1806                             "MSI-X: Unable to register handler -- %x/%d.\n",
1807                             imsix_entries[i].index, ret);
1808                         qla24xx_disable_msix(ha);
1809                         goto msix_out;
1810                 }
1811                 qentry->have_irq = 1;
1812         }
1813
1814 msix_out:
1815         return ret;
1816 }
1817
1818 int
1819 qla2x00_request_irqs(scsi_qla_host_t *ha)
1820 {
1821         int ret;
1822         device_reg_t __iomem *reg = ha->iobase;
1823
1824         /* If possible, enable MSI-X. */
1825         if (!IS_QLA2432(ha) && !IS_QLA2532(ha))
1826                 goto skip_msix;
1827
1828         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1829             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1830                 DEBUG2(qla_printk(KERN_WARNING, ha,
1831                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1832                     ha->chip_revision, ha->fw_attributes));
1833
1834                 goto skip_msix;
1835         }
1836
1837         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1838             (ha->pdev->subsystem_device == 0x7040 ||
1839                 ha->pdev->subsystem_device == 0x7041 ||
1840                 ha->pdev->subsystem_device == 0x1705)) {
1841                 DEBUG2(qla_printk(KERN_WARNING, ha,
1842                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1843                     ha->pdev->subsystem_vendor,
1844                     ha->pdev->subsystem_device));
1845
1846                 goto skip_msi;
1847         }
1848
1849         ret = qla24xx_enable_msix(ha);
1850         if (!ret) {
1851                 DEBUG2(qla_printk(KERN_INFO, ha,
1852                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1853                     ha->fw_attributes));
1854                 goto clear_risc_ints;
1855         }
1856         qla_printk(KERN_WARNING, ha,
1857             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1858 skip_msix:
1859
1860         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha))
1861                 goto skip_msi;
1862
1863         ret = pci_enable_msi(ha->pdev);
1864         if (!ret) {
1865                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1866                 ha->flags.msi_enabled = 1;
1867         }
1868 skip_msi:
1869
1870         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1871             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1872         if (ret) {
1873                 qla_printk(KERN_WARNING, ha,
1874                     "Failed to reserve interrupt %d already in use.\n",
1875                     ha->pdev->irq);
1876                 goto fail;
1877         }
1878         ha->flags.inta_enabled = 1;
1879         ha->host->irq = ha->pdev->irq;
1880 clear_risc_ints:
1881
1882         ha->isp_ops->disable_intrs(ha);
1883         spin_lock_irq(&ha->hardware_lock);
1884         if (IS_FWI2_CAPABLE(ha)) {
1885                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1886                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1887         } else {
1888                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1889                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1890                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1891         }
1892         spin_unlock_irq(&ha->hardware_lock);
1893         ha->isp_ops->enable_intrs(ha);
1894
1895 fail:
1896         return ret;
1897 }
1898
1899 void
1900 qla2x00_free_irqs(scsi_qla_host_t *ha)
1901 {
1902
1903         if (ha->flags.msix_enabled)
1904                 qla24xx_disable_msix(ha);
1905         else if (ha->flags.inta_enabled) {
1906                 free_irq(ha->host->irq, ha);
1907                 pci_disable_msi(ha->pdev);
1908         }
1909 }