drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <scsi/scsi_tcq.h>
  10
  11 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  12 static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
  13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  17 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  18
  19 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
  20
  21 /**
  22  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  23  * @irq:
  24  * @dev_id: SCSI driver HA context
  25  *
  26  * Called by system whenever the host adapter generates an interrupt.
  27  *
  28  * Returns handled flag.
  29  */
  30 irqreturn_t
  31 qla2100_intr_handler(int irq, void *dev_id)
  32 {
  33         scsi_qla_host_t *ha;
  34         struct device_reg_2xxx __iomem *reg;
  35         int             status;
  36         unsigned long   flags;
  37         unsigned long   iter;
  38         uint16_t        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_irqsave(&ha->hardware_lock, flags);
  51         for (iter = 50; iter--; ) {
  52                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  53                         break;
  54
  55                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  56                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  57                         RD_REG_WORD(&reg->hccr);
  58
  59                         /* Get mailbox data. */
  60                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  61                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  62                                 qla2x00_mbx_completion(ha, mb[0]);
  63                                 status |= MBX_INTERRUPT;
  64                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  65                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  66                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  67                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  68                                 qla2x00_async_event(ha, mb);
  69                         } else {
  70                                 /*EMPTY*/
  71                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  72                                     "interrupt type (%d).\n",
  73                                     ha->host_no, mb[0]));
  74                         }
  75                         /* Release mailbox registers. */
  76                         WRT_REG_WORD(&reg->semaphore, 0);
  77                         RD_REG_WORD(&reg->semaphore);
  78                 } else {
  79                         qla2x00_process_response_queue(ha);
  80
  81                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  82                         RD_REG_WORD(&reg->hccr);
  83                 }
  84         }
  85         spin_unlock_irqrestore(&ha->hardware_lock, flags);
  86
  87         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
  88             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
  89                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
  90
  91                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  92                 up(&ha->mbx_intr_sem);
  93
  94                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
  95         }
  96
  97         return (IRQ_HANDLED);
  98 }
  99
 100 /**
 101  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 102  * @irq:
 103  * @dev_id: SCSI driver HA context
 104  *
 105  * Called by system whenever the host adapter generates an interrupt.
 106  *
 107  * Returns handled flag.
 108  */
 109 irqreturn_t
 110 qla2300_intr_handler(int irq, void *dev_id)
 111 {
 112         scsi_qla_host_t *ha;
 113         struct device_reg_2xxx __iomem *reg;
 114         int             status;
 115         unsigned long   flags;
 116         unsigned long   iter;
 117         uint32_t        stat;
 118         uint16_t        hccr;
 119         uint16_t        mb[4];
 120
 121         ha = (scsi_qla_host_t *) dev_id;
 122         if (!ha) {
 123                 printk(KERN_INFO
 124                     "%s(): NULL host pointer\n", __func__);
 125                 return (IRQ_NONE);
 126         }
 127
 128         reg = &ha->iobase->isp;
 129         status = 0;
 130
 131         spin_lock_irqsave(&ha->hardware_lock, flags);
 132         for (iter = 50; iter--; ) {
 133                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 134                 if (stat & HSR_RISC_PAUSED) {
 135                         hccr = RD_REG_WORD(&reg->hccr);
 136                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 137                                 qla_printk(KERN_INFO, ha,
 138                                     "Parity error -- HCCR=%x.\n", hccr);
 139                         else
 140                                 qla_printk(KERN_INFO, ha,
 141                                     "RISC paused -- HCCR=%x.\n", hccr);
 142
 143                         /*
 144                          * Issue a "HARD" reset in order for the RISC
 145                          * interrupt bit to be cleared.  Schedule a big
 146                          * hammmer to get out of the RISC PAUSED state.
 147                          */
 148                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 149                         RD_REG_WORD(&reg->hccr);
 150                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 151                         break;
 152                 } else if ((stat & HSR_RISC_INT) == 0)
 153                         break;
 154
 155                 switch (stat & 0xff) {
 156                 case 0x1:
 157                 case 0x2:
 158                 case 0x10:
 159                 case 0x11:
 160                         qla2x00_mbx_completion(ha, MSW(stat));
 161                         status |= MBX_INTERRUPT;
 162
 163                         /* Release mailbox registers. */
 164                         WRT_REG_WORD(&reg->semaphore, 0);
 165                         break;
 166                 case 0x12:
 167                         mb[0] = MSW(stat);
 168                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 169                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 170                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 171                         qla2x00_async_event(ha, mb);
 172                         break;
 173                 case 0x13:
 174                         qla2x00_process_response_queue(ha);
 175                         break;
 176                 case 0x15:
 177                         mb[0] = MBA_CMPLT_1_16BIT;
 178                         mb[1] = MSW(stat);
 179                         qla2x00_async_event(ha, mb);
 180                         break;
 181                 case 0x16:
 182                         mb[0] = MBA_SCSI_COMPLETION;
 183                         mb[1] = MSW(stat);
 184                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 185                         qla2x00_async_event(ha, mb);
 186                         break;
 187                 default:
 188                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 189                             "(%d).\n",
 190                             ha->host_no, stat & 0xff));
 191                         break;
 192                 }
 193                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 194                 RD_REG_WORD_RELAXED(&reg->hccr);
 195         }
 196         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 197
 198         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 199             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 200                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
 201
 202                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 203                 up(&ha->mbx_intr_sem);
 204
 205                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
 206         }
 207
 208         return (IRQ_HANDLED);
 209 }
 210
 211 /**
 212  * qla2x00_mbx_completion() - Process mailbox command completions.
 213  * @ha: SCSI driver HA context
 214  * @mb0: Mailbox0 register
 215  */
 216 static void
 217 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 218 {
 219         uint16_t        cnt;
 220         uint16_t __iomem *wptr;
 221         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 222
 223         /* Load return mailbox registers. */
 224         ha->flags.mbox_int = 1;
 225         ha->mailbox_out[0] = mb0;
 226         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 227
 228         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 229                 if (IS_QLA2200(ha) && cnt == 8)
 230                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 231                 if (cnt == 4 || cnt == 5)
 232                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 233                 else
 234                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 235
 236                 wptr++;
 237         }
 238
 239         if (ha->mcp) {
 240                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 241                     __func__, ha->host_no, ha->mcp->mb[0]));
 242         } else {
 243                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 244                     __func__, ha->host_no));
 245         }
 246 }
 247
 248 /**
 249  * qla2x00_async_event() - Process aynchronous events.
 250  * @ha: SCSI driver HA context
 251  * @mb: Mailbox registers (0 - 3)
 252  */
 253 static void
 254 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 255 {
 256 #define LS_UNKNOWN      2
 257         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
 258         char            *link_speed;
 259         uint16_t        handle_cnt;
 260         uint16_t        cnt;
 261         uint32_t        handles[5];
 262         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 263         uint32_t        rscn_entry, host_pid;
 264         uint8_t         rscn_queue_index;
 265
 266         /* Setup to process RIO completion. */
 267         handle_cnt = 0;
 268         switch (mb[0]) {
 269         case MBA_SCSI_COMPLETION:
 270                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 271                 handle_cnt = 1;
 272                 break;
 273         case MBA_CMPLT_1_16BIT:
 274                 handles[0] = mb[1];
 275                 handle_cnt = 1;
 276                 mb[0] = MBA_SCSI_COMPLETION;
 277                 break;
 278         case MBA_CMPLT_2_16BIT:
 279                 handles[0] = mb[1];
 280                 handles[1] = mb[2];
 281                 handle_cnt = 2;
 282                 mb[0] = MBA_SCSI_COMPLETION;
 283                 break;
 284         case MBA_CMPLT_3_16BIT:
 285                 handles[0] = mb[1];
 286                 handles[1] = mb[2];
 287                 handles[2] = mb[3];
 288                 handle_cnt = 3;
 289                 mb[0] = MBA_SCSI_COMPLETION;
 290                 break;
 291         case MBA_CMPLT_4_16BIT:
 292                 handles[0] = mb[1];
 293                 handles[1] = mb[2];
 294                 handles[2] = mb[3];
 295                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 296                 handle_cnt = 4;
 297                 mb[0] = MBA_SCSI_COMPLETION;
 298                 break;
 299         case MBA_CMPLT_5_16BIT:
 300                 handles[0] = mb[1];
 301                 handles[1] = mb[2];
 302                 handles[2] = mb[3];
 303                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 304                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 305                 handle_cnt = 5;
 306                 mb[0] = MBA_SCSI_COMPLETION;
 307                 break;
 308         case MBA_CMPLT_2_32BIT:
 309                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 310                 handles[1] = le32_to_cpu(
 311                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 312                     RD_MAILBOX_REG(ha, reg, 6));
 313                 handle_cnt = 2;
 314                 mb[0] = MBA_SCSI_COMPLETION;
 315                 break;
 316         default:
 317                 break;
 318         }
 319
 320         switch (mb[0]) {
 321         case MBA_SCSI_COMPLETION:       /* Fast Post */
 322                 if (!ha->flags.online)
 323                         break;
 324
 325                 for (cnt = 0; cnt < handle_cnt; cnt++)
 326                         qla2x00_process_completed_request(ha, handles[cnt]);
 327                 break;
 328
 329         case MBA_RESET:                 /* Reset */
 330                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 331
 332                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 333                 break;
 334
 335         case MBA_SYSTEM_ERR:            /* System Error */
 336                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 337                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 338                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 339
 340                 qla_printk(KERN_INFO, ha,
 341                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 342                     mb[1], mb[2], mb[3]);
 343
 344                 ha->isp_ops.fw_dump(ha, 1);
 345
 346                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 347                         if (mb[1] == 0 && mb[2] == 0) {
 348                                 qla_printk(KERN_ERR, ha,
 349                                     "Unrecoverable Hardware Error: adapter "
 350                                     "marked OFFLINE!\n");
 351                                 ha->flags.online = 0;
 352                         } else
 353                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 354                 } else if (mb[1] == 0) {
 355                         qla_printk(KERN_INFO, ha,
 356                             "Unrecoverable Hardware Error: adapter marked "
 357                             "OFFLINE!\n");
 358                         ha->flags.online = 0;
 359                 } else
 360                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 361                 break;
 362
 363         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 364                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 365                     ha->host_no));
 366                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 367
 368                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 369                 break;
 370
 371         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 372                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 373                     ha->host_no));
 374                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 375
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 380                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 381                     ha->host_no));
 382                 break;
 383
 384         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 385                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 386                     mb[1]));
 387                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 388
 389                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 390                         atomic_set(&ha->loop_state, LOOP_DOWN);
 391                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 392                         qla2x00_mark_all_devices_lost(ha, 1);
 393                 }
 394
 395                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 396
 397                 ha->flags.management_server_logged_in = 0;
 398                 break;
 399
 400         case MBA_LOOP_UP:               /* Loop Up Event */
 401                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 402                         link_speed = link_speeds[0];
 403                         ha->link_data_rate = PORT_SPEED_1GB;
 404                 } else {
 405                         link_speed = link_speeds[LS_UNKNOWN];
 406                         if (mb[1] < 5)
 407                                 link_speed = link_speeds[mb[1]];
 408                         ha->link_data_rate = mb[1];
 409                 }
 410
 411                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 412                     ha->host_no, link_speed));
 413                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 414                     link_speed);
 415
 416                 ha->flags.management_server_logged_in = 0;
 417                 break;
 418
 419         case MBA_LOOP_DOWN:             /* Loop Down Event */
 420                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 421                     ha->host_no, mb[1]));
 422                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 423
 424                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 425                         atomic_set(&ha->loop_state, LOOP_DOWN);
 426                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 427                         ha->device_flags |= DFLG_NO_CABLE;
 428                         qla2x00_mark_all_devices_lost(ha, 1);
 429                 }
 430
 431                 ha->flags.management_server_logged_in = 0;
 432                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 433                 if (ql2xfdmienable)
 434                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 435                 break;
 436
 437         case MBA_LIP_RESET:             /* LIP reset occurred */
 438                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 439                     ha->host_no, mb[1]));
 440                 qla_printk(KERN_INFO, ha,
 441                     "LIP reset occured (%x).\n", mb[1]);
 442
 443                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 444                         atomic_set(&ha->loop_state, LOOP_DOWN);
 445                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 446                         qla2x00_mark_all_devices_lost(ha, 1);
 447                 }
 448
 449                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 450
 451                 ha->operating_mode = LOOP;
 452                 ha->flags.management_server_logged_in = 0;
 453                 break;
 454
 455         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 456                 if (IS_QLA2100(ha))
 457                         break;
 458
 459                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 460                     ha->host_no));
 461
 462                 /*
 463                  * Until there's a transition from loop down to loop up, treat
 464                  * this as loop down only.
 465                  */
 466                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 467                         atomic_set(&ha->loop_state, LOOP_DOWN);
 468                         if (!atomic_read(&ha->loop_down_timer))
 469                                 atomic_set(&ha->loop_down_timer,
 470                                     LOOP_DOWN_TIME);
 471                         qla2x00_mark_all_devices_lost(ha, 1);
 472                 }
 473
 474                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 475                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 476                 }
 477                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 478                 break;
 479
 480         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 481                 if (IS_QLA2100(ha))
 482                         break;
 483
 484                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 485                     "received.\n",
 486                     ha->host_no));
 487                 qla_printk(KERN_INFO, ha,
 488                     "Configuration change detected: value=%x.\n", mb[1]);
 489
 490                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 491                         atomic_set(&ha->loop_state, LOOP_DOWN);
 492                         if (!atomic_read(&ha->loop_down_timer))
 493                                 atomic_set(&ha->loop_down_timer,
 494                                     LOOP_DOWN_TIME);
 495                         qla2x00_mark_all_devices_lost(ha, 1);
 496                 }
 497
 498                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 499                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 500                 break;
 501
 502         case MBA_PORT_UPDATE:           /* Port database update */
 503                 /*
 504                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 505                  * event etc. earlier indicating loop is down) then process
 506                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 507                  */
 508                 atomic_set(&ha->loop_down_timer, 0);
 509                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 510                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 511                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 512                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 513                             mb[2], mb[3]));
 514                         break;
 515                 }
 516
 517                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 518                     ha->host_no));
 519                 DEBUG(printk(KERN_INFO
 520                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 521                     ha->host_no, mb[1], mb[2], mb[3]));
 522
 523                 /*
 524                  * Mark all devices as missing so we will login again.
 525                  */
 526                 atomic_set(&ha->loop_state, LOOP_UP);
 527
 528                 qla2x00_mark_all_devices_lost(ha, 1);
 529
 530                 ha->flags.rscn_queue_overflow = 1;
 531
 532                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 533                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 534                 break;
 535
 536         case MBA_RSCN_UPDATE:           /* State Change Registration */
 537                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 538                     ha->host_no));
 539                 DEBUG(printk(KERN_INFO
 540                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 541                     ha->host_no, mb[1], mb[2]));
 542
 543                 rscn_entry = (mb[1] << 16) | mb[2];
 544                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 545                     ha->d_id.b.al_pa;
 546                 if (rscn_entry == host_pid) {
 547                         DEBUG(printk(KERN_INFO
 548                             "scsi(%ld): Ignoring RSCN update to local host "
 549                             "port ID (%06x)\n",
 550                             ha->host_no, host_pid));
 551                         break;
 552                 }
 553
 554                 rscn_queue_index = ha->rscn_in_ptr + 1;
 555                 if (rscn_queue_index == MAX_RSCN_COUNT)
 556                         rscn_queue_index = 0;
 557                 if (rscn_queue_index != ha->rscn_out_ptr) {
 558                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 559                         ha->rscn_in_ptr = rscn_queue_index;
 560                 } else {
 561                         ha->flags.rscn_queue_overflow = 1;
 562                 }
 563
 564                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 565                 atomic_set(&ha->loop_down_timer, 0);
 566                 ha->flags.management_server_logged_in = 0;
 567
 568                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 569                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 570                 break;
 571
 572         /* case MBA_RIO_RESPONSE: */
 573         case MBA_ZIO_RESPONSE:
 574                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 575                     ha->host_no));
 576                 DEBUG(printk(KERN_INFO
 577                     "scsi(%ld): [R|Z]IO update completion.\n",
 578                     ha->host_no));
 579
 580                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 581                         qla24xx_process_response_queue(ha);
 582                 else
 583                         qla2x00_process_response_queue(ha);
 584                 break;
 585
 586         case MBA_DISCARD_RND_FRAME:
 587                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 588                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 589                 break;
 590
 591         case MBA_TRACE_NOTIFICATION:
 592                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 593                 ha->host_no, mb[1], mb[2]));
 594                 break;
 595         }
 596 }
 597
 598 static void
 599 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 600 {
 601         fc_port_t *fcport = data;
 602
 603         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 604                 return;
 605
 606         if (sdev->ordered_tags)
 607                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 608                     sdev->queue_depth + 1);
 609         else
 610                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 611                     sdev->queue_depth + 1);
 612
 613         fcport->last_ramp_up = jiffies;
 614
 615         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 616             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 617             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 618             sdev->queue_depth));
 619 }
 620
 621 static void
 622 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 623 {
 624         fc_port_t *fcport = data;
 625
 626         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 627                 return;
 628
 629         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 630             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 631             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 632             sdev->queue_depth));
 633 }
 634
 635 static inline void
 636 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 637 {
 638         fc_port_t *fcport;
 639         struct scsi_device *sdev;
 640
 641         sdev = sp->cmd->device;
 642         if (sdev->queue_depth >= ha->max_q_depth)
 643                 return;
 644
 645         fcport = sp->fcport;
 646         if (time_before(jiffies,
 647             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 648                 return;
 649         if (time_before(jiffies,
 650             fcport->last_queue_full + ql2xqfullrampup * HZ))
 651                 return;
 652
 653         spin_unlock_irq(&ha->hardware_lock);
 654         starget_for_each_device(sdev->sdev_target, fcport,
 655             qla2x00_adjust_sdev_qdepth_up);
 656         spin_lock_irq(&ha->hardware_lock);
 657 }
 658
 659 /**
 660  * qla2x00_process_completed_request() - Process a Fast Post response.
 661  * @ha: SCSI driver HA context
 662  * @index: SRB index
 663  */
 664 static void
 665 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 666 {
 667         srb_t *sp;
 668
 669         /* Validate handle. */
 670         if (index >= MAX_OUTSTANDING_COMMANDS) {
 671                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 672                     ha->host_no, index));
 673                 qla_printk(KERN_WARNING, ha,
 674                     "Invalid SCSI completion handle %d.\n", index);
 675
 676                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 677                 return;
 678         }
 679
 680         sp = ha->outstanding_cmds[index];
 681         if (sp) {
 682                 /* Free outstanding command slot. */
 683                 ha->outstanding_cmds[index] = NULL;
 684
 685                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 686                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 687
 688                 /* Save ISP completion status */
 689                 sp->cmd->result = DID_OK << 16;
 690
 691                 qla2x00_ramp_up_queue_depth(ha, sp);
 692                 qla2x00_sp_compl(ha, sp);
 693         } else {
 694                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 695                     ha->host_no));
 696                 qla_printk(KERN_WARNING, ha,
 697                     "Invalid ISP SCSI completion handle\n");
 698
 699                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 700         }
 701 }
 702
 703 /**
 704  * qla2x00_process_response_queue() - Process response queue entries.
 705  * @ha: SCSI driver HA context
 706  */
 707 void
 708 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 709 {
 710         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 711         sts_entry_t     *pkt;
 712         uint16_t        handle_cnt;
 713         uint16_t        cnt;
 714
 715         if (!ha->flags.online)
 716                 return;
 717
 718         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 719                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 720
 721                 ha->rsp_ring_index++;
 722                 if (ha->rsp_ring_index == ha->response_q_length) {
 723                         ha->rsp_ring_index = 0;
 724                         ha->response_ring_ptr = ha->response_ring;
 725                 } else {
 726                         ha->response_ring_ptr++;
 727                 }
 728
 729                 if (pkt->entry_status != 0) {
 730                         DEBUG3(printk(KERN_INFO
 731                             "scsi(%ld): Process error entry.\n", ha->host_no));
 732
 733                         qla2x00_error_entry(ha, pkt);
 734                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 735                         wmb();
 736                         continue;
 737                 }
 738
 739                 switch (pkt->entry_type) {
 740                 case STATUS_TYPE:
 741                         qla2x00_status_entry(ha, pkt);
 742                         break;
 743                 case STATUS_TYPE_21:
 744                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 745                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 746                                 qla2x00_process_completed_request(ha,
 747                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 748                         }
 749                         break;
 750                 case STATUS_TYPE_22:
 751                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 752                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 753                                 qla2x00_process_completed_request(ha,
 754                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 755                         }
 756                         break;
 757                 case STATUS_CONT_TYPE:
 758                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 759                         break;
 760                 case MS_IOCB_TYPE:
 761                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 762                         break;
 763                 default:
 764                         /* Type Not Supported. */
 765                         DEBUG4(printk(KERN_WARNING
 766                             "scsi(%ld): Received unknown response pkt type %x "
 767                             "entry status=%x.\n",
 768                             ha->host_no, pkt->entry_type, pkt->entry_status));
 769                         break;
 770                 }
 771                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 772                 wmb();
 773         }
 774
 775         /* Adjust ring index */
 776         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 777 }
 778
 779 /**
 780  * qla2x00_status_entry() - Process a Status IOCB entry.
 781  * @ha: SCSI driver HA context
 782  * @pkt: Entry pointer
 783  */
 784 static void
 785 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 786 {
 787         srb_t           *sp;
 788         fc_port_t       *fcport;
 789         struct scsi_cmnd *cp;
 790         sts_entry_t *sts;
 791         struct sts_entry_24xx *sts24;
 792         uint16_t        comp_status;
 793         uint16_t        scsi_status;
 794         uint8_t         lscsi_status;
 795         int32_t         resid;
 796         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 797         uint8_t         *rsp_info, *sense_data;
 798
 799         sts = (sts_entry_t *) pkt;
 800         sts24 = (struct sts_entry_24xx *) pkt;
 801         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 802                 comp_status = le16_to_cpu(sts24->comp_status);
 803                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 804         } else {
 805                 comp_status = le16_to_cpu(sts->comp_status);
 806                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 807         }
 808
 809         /* Fast path completion. */
 810         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 811                 qla2x00_process_completed_request(ha, sts->handle);
 812
 813                 return;
 814         }
 815
 816         /* Validate handle. */
 817         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 818                 sp = ha->outstanding_cmds[sts->handle];
 819                 ha->outstanding_cmds[sts->handle] = NULL;
 820         } else
 821                 sp = NULL;
 822
 823         if (sp == NULL) {
 824                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 825                     ha->host_no));
 826                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 827
 828                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 829                 qla2xxx_wake_dpc(ha);
 830                 return;
 831         }
 832         cp = sp->cmd;
 833         if (cp == NULL) {
 834                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 835                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 836                 qla_printk(KERN_WARNING, ha,
 837                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 838
 839                 return;
 840         }
 841
 842         lscsi_status = scsi_status & STATUS_MASK;
 843         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 844         CMD_COMPL_STATUS(cp) = comp_status;
 845         CMD_SCSI_STATUS(cp) = scsi_status;
 846
 847         fcport = sp->fcport;
 848
 849         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 850         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 851                 sense_len = le32_to_cpu(sts24->sense_len);
 852                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 853                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 854                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 855                 rsp_info = sts24->data;
 856                 sense_data = sts24->data;
 857                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 858         } else {
 859                 sense_len = le16_to_cpu(sts->req_sense_length);
 860                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 861                 resid_len = le32_to_cpu(sts->residual_length);
 862                 rsp_info = sts->rsp_info;
 863                 sense_data = sts->req_sense_data;
 864         }
 865
 866         /* Check for any FCP transport errors. */
 867         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 868                 /* Sense data lies beyond any FCP RESPONSE data. */
 869                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 870                         sense_data += rsp_info_len;
 871                 if (rsp_info_len > 3 && rsp_info[3]) {
 872                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 873                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 874                             "retrying command\n", ha->host_no,
 875                             cp->device->channel, cp->device->id,
 876                             cp->device->lun, rsp_info_len, rsp_info[0],
 877                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 878                             rsp_info[5], rsp_info[6], rsp_info[7]));
 879
 880                         cp->result = DID_BUS_BUSY << 16;
 881                         qla2x00_sp_compl(ha, sp);
 882                         return;
 883                 }
 884         }
 885
 886         /*
 887          * Based on Host and scsi status generate status code for Linux
 888          */
 889         switch (comp_status) {
 890         case CS_COMPLETE:
 891         case CS_QUEUE_FULL:
 892                 if (scsi_status == 0) {
 893                         cp->result = DID_OK << 16;
 894                         break;
 895                 }
 896                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 897                         resid = resid_len;
 898                         cp->resid = resid;
 899                         CMD_RESID_LEN(cp) = resid;
 900
 901                         if (!lscsi_status &&
 902                             ((unsigned)(cp->request_bufflen - resid) <
 903                              cp->underflow)) {
 904                                 qla_printk(KERN_INFO, ha,
 905                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 906                                     "detected (%x of %x bytes)...returning "
 907                                     "error status.\n", ha->host_no,
 908                                     cp->device->channel, cp->device->id,
 909                                     cp->device->lun, resid,
 910                                     cp->request_bufflen);
 911
 912                                 cp->result = DID_ERROR << 16;
 913                                 break;
 914                         }
 915                 }
 916                 cp->result = DID_OK << 16 | lscsi_status;
 917
 918                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 919                         DEBUG2(printk(KERN_INFO
 920                             "scsi(%ld): QUEUE FULL status detected "
 921                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 922                             scsi_status));
 923
 924                         /* Adjust queue depth for all luns on the port. */
 925                         fcport->last_queue_full = jiffies;
 926                         spin_unlock_irq(&ha->hardware_lock);
 927                         starget_for_each_device(cp->device->sdev_target,
 928                             fcport, qla2x00_adjust_sdev_qdepth_down);
 929                         spin_lock_irq(&ha->hardware_lock);
 930                         break;
 931                 }
 932                 if (lscsi_status != SS_CHECK_CONDITION)
 933                         break;
 934
 935                 /* Copy Sense Data into sense buffer. */
 936                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 937
 938                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 939                         break;
 940
 941                 if (sense_len >= sizeof(cp->sense_buffer))
 942                         sense_len = sizeof(cp->sense_buffer);
 943
 944                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 945                 sp->request_sense_length = sense_len;
 946                 sp->request_sense_ptr = cp->sense_buffer;
 947
 948                 if (sp->request_sense_length > 32)
 949                         sense_len = 32;
 950
 951                 memcpy(cp->sense_buffer, sense_data, sense_len);
 952
 953                 sp->request_sense_ptr += sense_len;
 954                 sp->request_sense_length -= sense_len;
 955                 if (sp->request_sense_length != 0)
 956                         ha->status_srb = sp;
 957
 958                 DEBUG5(printk("%s(): Check condition Sense data, "
 959                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 960                     ha->host_no, cp->device->channel, cp->device->id,
 961                     cp->device->lun, cp, cp->serial_number));
 962                 if (sense_len)
 963                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 964                             CMD_ACTUAL_SNSLEN(cp)));
 965                 break;
 966
 967         case CS_DATA_UNDERRUN:
 968                 resid = resid_len;
 969                 /* Use F/W calculated residual length. */
 970                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 971                         resid = fw_resid_len;
 972
 973                 if (scsi_status & SS_RESIDUAL_UNDER) {
 974                         cp->resid = resid;
 975                         CMD_RESID_LEN(cp) = resid;
 976                 } else {
 977                         DEBUG2(printk(KERN_INFO
 978                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 979                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 980                             "os_underflow=0x%x\n", ha->host_no,
 981                             cp->device->id, cp->device->lun, comp_status,
 982                             scsi_status, resid_len, resid, cp->cmnd[0],
 983                             cp->underflow));
 984
 985                 }
 986
 987                 /*
 988                  * Check to see if SCSI Status is non zero. If so report SCSI
 989                  * Status.
 990                  */
 991                 if (lscsi_status != 0) {
 992                         cp->result = DID_OK << 16 | lscsi_status;
 993
 994                         if (lscsi_status != SS_CHECK_CONDITION)
 995                                 break;
 996
 997                         /* Copy Sense Data into sense buffer */
 998                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 999
1000                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1001                                 break;
1002
1003                         if (sense_len >= sizeof(cp->sense_buffer))
1004                                 sense_len = sizeof(cp->sense_buffer);
1005
1006                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1007                         sp->request_sense_length = sense_len;
1008                         sp->request_sense_ptr = cp->sense_buffer;
1009
1010                         if (sp->request_sense_length > 32)
1011                                 sense_len = 32;
1012
1013                         memcpy(cp->sense_buffer, sense_data, sense_len);
1014
1015                         sp->request_sense_ptr += sense_len;
1016                         sp->request_sense_length -= sense_len;
1017                         if (sp->request_sense_length != 0)
1018                                 ha->status_srb = sp;
1019
1020                         DEBUG5(printk("%s(): Check condition Sense data, "
1021                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1022                             __func__, ha->host_no, cp->device->channel,
1023                             cp->device->id, cp->device->lun, cp,
1024                             cp->serial_number));
1025
1026                         if (sense_len)
1027                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1028                                     CMD_ACTUAL_SNSLEN(cp)));
1029                 } else {
1030                         /*
1031                          * If RISC reports underrun and target does not report
1032                          * it then we must have a lost frame, so tell upper
1033                          * layer to retry it by reporting a bus busy.
1034                          */
1035                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1036                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1037                                     "frame(s) detected (%x of %x bytes)..."
1038                                     "retrying command.\n", ha->host_no,
1039                                     cp->device->channel, cp->device->id,
1040                                     cp->device->lun, resid,
1041                                     cp->request_bufflen));
1042
1043                                 cp->result = DID_BUS_BUSY << 16;
1044                                 break;
1045                         }
1046
1047                         /* Handle mid-layer underflow */
1048                         if ((unsigned)(cp->request_bufflen - resid) <
1049                             cp->underflow) {
1050                                 qla_printk(KERN_INFO, ha,
1051                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1052                                     "detected (%x of %x bytes)...returning "
1053                                     "error status.\n", ha->host_no,
1054                                     cp->device->channel, cp->device->id,
1055                                     cp->device->lun, resid,
1056                                     cp->request_bufflen);
1057
1058                                 cp->result = DID_ERROR << 16;
1059                                 break;
1060                         }
1061
1062                         /* Everybody online, looking good... */
1063                         cp->result = DID_OK << 16;
1064                 }
1065                 break;
1066
1067         case CS_DATA_OVERRUN:
1068                 DEBUG2(printk(KERN_INFO
1069                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1070                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1071                     scsi_status));
1072                 DEBUG2(printk(KERN_INFO
1073                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1074                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1075                     cp->cmnd[4], cp->cmnd[5]));
1076                 DEBUG2(printk(KERN_INFO
1077                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1078                     "status!\n",
1079                     cp->serial_number, cp->request_bufflen, resid_len));
1080
1081                 cp->result = DID_ERROR << 16;
1082                 break;
1083
1084         case CS_PORT_LOGGED_OUT:
1085         case CS_PORT_CONFIG_CHG:
1086         case CS_PORT_BUSY:
1087         case CS_INCOMPLETE:
1088         case CS_PORT_UNAVAILABLE:
1089                 /*
1090                  * If the port is in Target Down state, return all IOs for this
1091                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1092                  * retry_queue.
1093                  */
1094                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1095                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1096                     ha->host_no, cp->device->id, cp->device->lun,
1097                     cp->serial_number, comp_status,
1098                     atomic_read(&fcport->state)));
1099
1100                 cp->result = DID_BUS_BUSY << 16;
1101                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1102                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1103                 }
1104                 break;
1105
1106         case CS_RESET:
1107                 DEBUG2(printk(KERN_INFO
1108                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1109                     ha->host_no, comp_status, scsi_status));
1110
1111                 cp->result = DID_RESET << 16;
1112                 break;
1113
1114         case CS_ABORTED:
1115                 /*
1116                  * hv2.19.12 - DID_ABORT does not retry the request if we
1117                  * aborted this request then abort otherwise it must be a
1118                  * reset.
1119                  */
1120                 DEBUG2(printk(KERN_INFO
1121                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1122                     ha->host_no, comp_status, scsi_status));
1123
1124                 cp->result = DID_RESET << 16;
1125                 break;
1126
1127         case CS_TIMEOUT:
1128                 cp->result = DID_BUS_BUSY << 16;
1129
1130                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1131                         DEBUG2(printk(KERN_INFO
1132                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1133                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1134                             cp->device->id, cp->device->lun, comp_status,
1135                             scsi_status));
1136                         break;
1137                 }
1138                 DEBUG2(printk(KERN_INFO
1139                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1140                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1141                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1142                     le16_to_cpu(sts->status_flags)));
1143
1144                 /* Check to see if logout occurred. */
1145                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1146                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1147                 break;
1148
1149         default:
1150                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1151                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1152                 qla_printk(KERN_INFO, ha,
1153                     "Unknown status detected 0x%x-0x%x.\n",
1154                     comp_status, scsi_status);
1155
1156                 cp->result = DID_ERROR << 16;
1157                 break;
1158         }
1159
1160         /* Place command on done queue. */
1161         if (ha->status_srb == NULL)
1162                 qla2x00_sp_compl(ha, sp);
1163 }
1164
1165 /**
1166  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1167  * @ha: SCSI driver HA context
1168  * @pkt: Entry pointer
1169  *
1170  * Extended sense data.
1171  */
1172 static void
1173 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1174 {
1175         uint8_t         sense_sz = 0;
1176         srb_t           *sp = ha->status_srb;
1177         struct scsi_cmnd *cp;
1178
1179         if (sp != NULL && sp->request_sense_length != 0) {
1180                 cp = sp->cmd;
1181                 if (cp == NULL) {
1182                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1183                             "sp=%p.\n", __func__, sp));
1184                         qla_printk(KERN_INFO, ha,
1185                             "cmd is NULL: already returned to OS (sp=%p)\n",
1186                             sp);
1187
1188                         ha->status_srb = NULL;
1189                         return;
1190                 }
1191
1192                 if (sp->request_sense_length > sizeof(pkt->data)) {
1193                         sense_sz = sizeof(pkt->data);
1194                 } else {
1195                         sense_sz = sp->request_sense_length;
1196                 }
1197
1198                 /* Move sense data. */
1199                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1200                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1201                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1202                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1203
1204                 sp->request_sense_ptr += sense_sz;
1205                 sp->request_sense_length -= sense_sz;
1206
1207                 /* Place command on done queue. */
1208                 if (sp->request_sense_length == 0) {
1209                         ha->status_srb = NULL;
1210                         qla2x00_sp_compl(ha, sp);
1211                 }
1212         }
1213 }
1214
1215 /**
1216  * qla2x00_error_entry() - Process an error entry.
1217  * @ha: SCSI driver HA context
1218  * @pkt: Entry pointer
1219  */
1220 static void
1221 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1222 {
1223         srb_t *sp;
1224
1225 #if defined(QL_DEBUG_LEVEL_2)
1226         if (pkt->entry_status & RF_INV_E_ORDER)
1227                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1228         else if (pkt->entry_status & RF_INV_E_COUNT)
1229                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1230         else if (pkt->entry_status & RF_INV_E_PARAM)
1231                 qla_printk(KERN_ERR, ha,
1232                     "%s: Invalid Entry Parameter\n", __func__);
1233         else if (pkt->entry_status & RF_INV_E_TYPE)
1234                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1235         else if (pkt->entry_status & RF_BUSY)
1236                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1237         else
1238                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1239 #endif
1240
1241         /* Validate handle. */
1242         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1243                 sp = ha->outstanding_cmds[pkt->handle];
1244         else
1245                 sp = NULL;
1246
1247         if (sp) {
1248                 /* Free outstanding command slot. */
1249                 ha->outstanding_cmds[pkt->handle] = NULL;
1250
1251                 /* Bad payload or header */
1252                 if (pkt->entry_status &
1253                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1254                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1255                         sp->cmd->result = DID_ERROR << 16;
1256                 } else if (pkt->entry_status & RF_BUSY) {
1257                         sp->cmd->result = DID_BUS_BUSY << 16;
1258                 } else {
1259                         sp->cmd->result = DID_ERROR << 16;
1260                 }
1261                 qla2x00_sp_compl(ha, sp);
1262
1263         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1264             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1265                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1266                     ha->host_no));
1267                 qla_printk(KERN_WARNING, ha,
1268                     "Error entry - invalid handle\n");
1269
1270                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1271                 qla2xxx_wake_dpc(ha);
1272         }
1273 }
1274
1275 /**
1276  * qla2x00_ms_entry() - Process a Management Server entry.
1277  * @ha: SCSI driver HA context
1278  * @index: Response queue out pointer
1279  */
1280 static void
1281 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1282 {
1283         srb_t          *sp;
1284
1285         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1286             __func__, ha->host_no, pkt, pkt->handle1));
1287
1288         /* Validate handle. */
1289         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1290                 sp = ha->outstanding_cmds[pkt->handle1];
1291         else
1292                 sp = NULL;
1293
1294         if (sp == NULL) {
1295                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1296                     ha->host_no));
1297                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1298
1299                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1300                 return;
1301         }
1302
1303         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1304         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1305
1306         /* Free outstanding command slot. */
1307         ha->outstanding_cmds[pkt->handle1] = NULL;
1308
1309         qla2x00_sp_compl(ha, sp);
1310 }
1311
1312
1313 /**
1314  * qla24xx_mbx_completion() - Process mailbox command completions.
1315  * @ha: SCSI driver HA context
1316  * @mb0: Mailbox0 register
1317  */
1318 static void
1319 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1320 {
1321         uint16_t        cnt;
1322         uint16_t __iomem *wptr;
1323         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1324
1325         /* Load return mailbox registers. */
1326         ha->flags.mbox_int = 1;
1327         ha->mailbox_out[0] = mb0;
1328         wptr = (uint16_t __iomem *)&reg->mailbox1;
1329
1330         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1331                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1332                 wptr++;
1333         }
1334
1335         if (ha->mcp) {
1336                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1337                     __func__, ha->host_no, ha->mcp->mb[0]));
1338         } else {
1339                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1340                     __func__, ha->host_no));
1341         }
1342 }
1343
1344 /**
1345  * qla24xx_process_response_queue() - Process response queue entries.
1346  * @ha: SCSI driver HA context
1347  */
1348 void
1349 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1350 {
1351         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1352         struct sts_entry_24xx *pkt;
1353
1354         if (!ha->flags.online)
1355                 return;
1356
1357         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1358                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1359
1360                 ha->rsp_ring_index++;
1361                 if (ha->rsp_ring_index == ha->response_q_length) {
1362                         ha->rsp_ring_index = 0;
1363                         ha->response_ring_ptr = ha->response_ring;
1364                 } else {
1365                         ha->response_ring_ptr++;
1366                 }
1367
1368                 if (pkt->entry_status != 0) {
1369                         DEBUG3(printk(KERN_INFO
1370                             "scsi(%ld): Process error entry.\n", ha->host_no));
1371
1372                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1373                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1374                         wmb();
1375                         continue;
1376                 }
1377
1378                 switch (pkt->entry_type) {
1379                 case STATUS_TYPE:
1380                         qla2x00_status_entry(ha, pkt);
1381                         break;
1382                 case STATUS_CONT_TYPE:
1383                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1384                         break;
1385                 case MS_IOCB_TYPE:
1386                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1387                         break;
1388                 default:
1389                         /* Type Not Supported. */
1390                         DEBUG4(printk(KERN_WARNING
1391                             "scsi(%ld): Received unknown response pkt type %x "
1392                             "entry status=%x.\n",
1393                             ha->host_no, pkt->entry_type, pkt->entry_status));
1394                         break;
1395                 }
1396                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1397                 wmb();
1398         }
1399
1400         /* Adjust ring index */
1401         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1402 }
1403
1404 /**
1405  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1406  * @irq:
1407  * @dev_id: SCSI driver HA context
1408  *
1409  * Called by system whenever the host adapter generates an interrupt.
1410  *
1411  * Returns handled flag.
1412  */
1413 irqreturn_t
1414 qla24xx_intr_handler(int irq, void *dev_id)
1415 {
1416         scsi_qla_host_t *ha;
1417         struct device_reg_24xx __iomem *reg;
1418         int             status;
1419         unsigned long   flags;
1420         unsigned long   iter;
1421         uint32_t        stat;
1422         uint32_t        hccr;
1423         uint16_t        mb[4];
1424
1425         ha = (scsi_qla_host_t *) dev_id;
1426         if (!ha) {
1427                 printk(KERN_INFO
1428                     "%s(): NULL host pointer\n", __func__);
1429                 return IRQ_NONE;
1430         }
1431
1432         reg = &ha->iobase->isp24;
1433         status = 0;
1434
1435         spin_lock_irqsave(&ha->hardware_lock, flags);
1436         for (iter = 50; iter--; ) {
1437                 stat = RD_REG_DWORD(&reg->host_status);
1438                 if (stat & HSRX_RISC_PAUSED) {
1439                         hccr = RD_REG_DWORD(&reg->hccr);
1440
1441                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1442                             "Dumping firmware!\n", hccr);
1443                         qla24xx_fw_dump(ha, 1);
1444
1445                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1446                         break;
1447                 } else if ((stat & HSRX_RISC_INT) == 0)
1448                         break;
1449
1450                 switch (stat & 0xff) {
1451                 case 0x1:
1452                 case 0x2:
1453                 case 0x10:
1454                 case 0x11:
1455                         qla24xx_mbx_completion(ha, MSW(stat));
1456                         status |= MBX_INTERRUPT;
1457
1458                         break;
1459                 case 0x12:
1460                         mb[0] = MSW(stat);
1461                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1462                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1463                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1464                         qla2x00_async_event(ha, mb);
1465                         break;
1466                 case 0x13:
1467                         qla24xx_process_response_queue(ha);
1468                         break;
1469                 default:
1470                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1471                             "(%d).\n",
1472                             ha->host_no, stat & 0xff));
1473                         break;
1474                 }
1475                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1476                 RD_REG_DWORD_RELAXED(&reg->hccr);
1477         }
1478         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1479
1480         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1481             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1482                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1483
1484                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1485                 up(&ha->mbx_intr_sem);
1486
1487                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1488         }
1489
1490         return IRQ_HANDLED;
1491 }
1492
1493 /**
1494  * qla24xx_ms_entry() - Process a Management Server entry.
1495  * @ha: SCSI driver HA context
1496  * @index: Response queue out pointer
1497  */
1498 static void
1499 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1500 {
1501         srb_t          *sp;
1502
1503         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1504             __func__, ha->host_no, pkt, pkt->handle));
1505
1506         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1507         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1508
1509         /* Validate handle. */
1510         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1511                 sp = ha->outstanding_cmds[pkt->handle];
1512         else
1513                 sp = NULL;
1514
1515         if (sp == NULL) {
1516                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1517                     ha->host_no));
1518                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1519                     ha->host_no));
1520                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1521                     pkt->handle);
1522
1523                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1524                 return;
1525         }
1526
1527         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1528         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1529
1530         /* Free outstanding command slot. */
1531         ha->outstanding_cmds[pkt->handle] = NULL;
1532
1533         qla2x00_sp_compl(ha, sp);
1534 }
1535