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
 479                 ha->flags.gpsc_supported = 1;
 480                 break;
 481
 482         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 483                 if (IS_QLA2100(ha))
 484                         break;
 485
 486                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 487                     "received.\n",
 488                     ha->host_no));
 489                 qla_printk(KERN_INFO, ha,
 490                     "Configuration change detected: value=%x.\n", mb[1]);
 491
 492                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 493                         atomic_set(&ha->loop_state, LOOP_DOWN);
 494                         if (!atomic_read(&ha->loop_down_timer))
 495                                 atomic_set(&ha->loop_down_timer,
 496                                     LOOP_DOWN_TIME);
 497                         qla2x00_mark_all_devices_lost(ha, 1);
 498                 }
 499
 500                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 501                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 502                 break;
 503
 504         case MBA_PORT_UPDATE:           /* Port database update */
 505                 /*
 506                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 507                  * event etc. earlier indicating loop is down) then process
 508                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 509                  */
 510                 atomic_set(&ha->loop_down_timer, 0);
 511                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 512                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 513                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 514                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 515                             mb[2], mb[3]));
 516                         break;
 517                 }
 518
 519                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 520                     ha->host_no));
 521                 DEBUG(printk(KERN_INFO
 522                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 523                     ha->host_no, mb[1], mb[2], mb[3]));
 524
 525                 /*
 526                  * Mark all devices as missing so we will login again.
 527                  */
 528                 atomic_set(&ha->loop_state, LOOP_UP);
 529
 530                 qla2x00_mark_all_devices_lost(ha, 1);
 531
 532                 ha->flags.rscn_queue_overflow = 1;
 533
 534                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 535                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 536                 break;
 537
 538         case MBA_RSCN_UPDATE:           /* State Change Registration */
 539                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 540                     ha->host_no));
 541                 DEBUG(printk(KERN_INFO
 542                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 543                     ha->host_no, mb[1], mb[2]));
 544
 545                 rscn_entry = (mb[1] << 16) | mb[2];
 546                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 547                     ha->d_id.b.al_pa;
 548                 if (rscn_entry == host_pid) {
 549                         DEBUG(printk(KERN_INFO
 550                             "scsi(%ld): Ignoring RSCN update to local host "
 551                             "port ID (%06x)\n",
 552                             ha->host_no, host_pid));
 553                         break;
 554                 }
 555
 556                 rscn_queue_index = ha->rscn_in_ptr + 1;
 557                 if (rscn_queue_index == MAX_RSCN_COUNT)
 558                         rscn_queue_index = 0;
 559                 if (rscn_queue_index != ha->rscn_out_ptr) {
 560                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 561                         ha->rscn_in_ptr = rscn_queue_index;
 562                 } else {
 563                         ha->flags.rscn_queue_overflow = 1;
 564                 }
 565
 566                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 567                 atomic_set(&ha->loop_down_timer, 0);
 568                 ha->flags.management_server_logged_in = 0;
 569
 570                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 571                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 572                 break;
 573
 574         /* case MBA_RIO_RESPONSE: */
 575         case MBA_ZIO_RESPONSE:
 576                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 577                     ha->host_no));
 578                 DEBUG(printk(KERN_INFO
 579                     "scsi(%ld): [R|Z]IO update completion.\n",
 580                     ha->host_no));
 581
 582                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 583                         qla24xx_process_response_queue(ha);
 584                 else
 585                         qla2x00_process_response_queue(ha);
 586                 break;
 587
 588         case MBA_DISCARD_RND_FRAME:
 589                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 590                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 591                 break;
 592
 593         case MBA_TRACE_NOTIFICATION:
 594                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 595                 ha->host_no, mb[1], mb[2]));
 596                 break;
 597         }
 598 }
 599
 600 static void
 601 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 602 {
 603         fc_port_t *fcport = data;
 604
 605         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 606                 return;
 607
 608         if (sdev->ordered_tags)
 609                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 610                     sdev->queue_depth + 1);
 611         else
 612                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 613                     sdev->queue_depth + 1);
 614
 615         fcport->last_ramp_up = jiffies;
 616
 617         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 618             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 619             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 620             sdev->queue_depth));
 621 }
 622
 623 static void
 624 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 625 {
 626         fc_port_t *fcport = data;
 627
 628         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 629                 return;
 630
 631         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 632             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 633             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 634             sdev->queue_depth));
 635 }
 636
 637 static inline void
 638 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 639 {
 640         fc_port_t *fcport;
 641         struct scsi_device *sdev;
 642
 643         sdev = sp->cmd->device;
 644         if (sdev->queue_depth >= ha->max_q_depth)
 645                 return;
 646
 647         fcport = sp->fcport;
 648         if (time_before(jiffies,
 649             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 650                 return;
 651         if (time_before(jiffies,
 652             fcport->last_queue_full + ql2xqfullrampup * HZ))
 653                 return;
 654
 655         spin_unlock_irq(&ha->hardware_lock);
 656         starget_for_each_device(sdev->sdev_target, fcport,
 657             qla2x00_adjust_sdev_qdepth_up);
 658         spin_lock_irq(&ha->hardware_lock);
 659 }
 660
 661 /**
 662  * qla2x00_process_completed_request() - Process a Fast Post response.
 663  * @ha: SCSI driver HA context
 664  * @index: SRB index
 665  */
 666 static void
 667 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 668 {
 669         srb_t *sp;
 670
 671         /* Validate handle. */
 672         if (index >= MAX_OUTSTANDING_COMMANDS) {
 673                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 674                     ha->host_no, index));
 675                 qla_printk(KERN_WARNING, ha,
 676                     "Invalid SCSI completion handle %d.\n", index);
 677
 678                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 679                 return;
 680         }
 681
 682         sp = ha->outstanding_cmds[index];
 683         if (sp) {
 684                 /* Free outstanding command slot. */
 685                 ha->outstanding_cmds[index] = NULL;
 686
 687                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 688                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 689
 690                 /* Save ISP completion status */
 691                 sp->cmd->result = DID_OK << 16;
 692
 693                 qla2x00_ramp_up_queue_depth(ha, sp);
 694                 qla2x00_sp_compl(ha, sp);
 695         } else {
 696                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 697                     ha->host_no));
 698                 qla_printk(KERN_WARNING, ha,
 699                     "Invalid ISP SCSI completion handle\n");
 700
 701                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 702         }
 703 }
 704
 705 /**
 706  * qla2x00_process_response_queue() - Process response queue entries.
 707  * @ha: SCSI driver HA context
 708  */
 709 void
 710 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 711 {
 712         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 713         sts_entry_t     *pkt;
 714         uint16_t        handle_cnt;
 715         uint16_t        cnt;
 716
 717         if (!ha->flags.online)
 718                 return;
 719
 720         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 721                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 722
 723                 ha->rsp_ring_index++;
 724                 if (ha->rsp_ring_index == ha->response_q_length) {
 725                         ha->rsp_ring_index = 0;
 726                         ha->response_ring_ptr = ha->response_ring;
 727                 } else {
 728                         ha->response_ring_ptr++;
 729                 }
 730
 731                 if (pkt->entry_status != 0) {
 732                         DEBUG3(printk(KERN_INFO
 733                             "scsi(%ld): Process error entry.\n", ha->host_no));
 734
 735                         qla2x00_error_entry(ha, pkt);
 736                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 737                         wmb();
 738                         continue;
 739                 }
 740
 741                 switch (pkt->entry_type) {
 742                 case STATUS_TYPE:
 743                         qla2x00_status_entry(ha, pkt);
 744                         break;
 745                 case STATUS_TYPE_21:
 746                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 747                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 748                                 qla2x00_process_completed_request(ha,
 749                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 750                         }
 751                         break;
 752                 case STATUS_TYPE_22:
 753                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 754                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 755                                 qla2x00_process_completed_request(ha,
 756                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 757                         }
 758                         break;
 759                 case STATUS_CONT_TYPE:
 760                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 761                         break;
 762                 case MS_IOCB_TYPE:
 763                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 764                         break;
 765                 default:
 766                         /* Type Not Supported. */
 767                         DEBUG4(printk(KERN_WARNING
 768                             "scsi(%ld): Received unknown response pkt type %x "
 769                             "entry status=%x.\n",
 770                             ha->host_no, pkt->entry_type, pkt->entry_status));
 771                         break;
 772                 }
 773                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 774                 wmb();
 775         }
 776
 777         /* Adjust ring index */
 778         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 779 }
 780
 781 /**
 782  * qla2x00_status_entry() - Process a Status IOCB entry.
 783  * @ha: SCSI driver HA context
 784  * @pkt: Entry pointer
 785  */
 786 static void
 787 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 788 {
 789         srb_t           *sp;
 790         fc_port_t       *fcport;
 791         struct scsi_cmnd *cp;
 792         sts_entry_t *sts;
 793         struct sts_entry_24xx *sts24;
 794         uint16_t        comp_status;
 795         uint16_t        scsi_status;
 796         uint8_t         lscsi_status;
 797         int32_t         resid;
 798         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 799         uint8_t         *rsp_info, *sense_data;
 800
 801         sts = (sts_entry_t *) pkt;
 802         sts24 = (struct sts_entry_24xx *) pkt;
 803         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 804                 comp_status = le16_to_cpu(sts24->comp_status);
 805                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 806         } else {
 807                 comp_status = le16_to_cpu(sts->comp_status);
 808                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 809         }
 810
 811         /* Fast path completion. */
 812         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 813                 qla2x00_process_completed_request(ha, sts->handle);
 814
 815                 return;
 816         }
 817
 818         /* Validate handle. */
 819         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 820                 sp = ha->outstanding_cmds[sts->handle];
 821                 ha->outstanding_cmds[sts->handle] = NULL;
 822         } else
 823                 sp = NULL;
 824
 825         if (sp == NULL) {
 826                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 827                     ha->host_no));
 828                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 829
 830                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 831                 qla2xxx_wake_dpc(ha);
 832                 return;
 833         }
 834         cp = sp->cmd;
 835         if (cp == NULL) {
 836                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 837                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 838                 qla_printk(KERN_WARNING, ha,
 839                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 840
 841                 return;
 842         }
 843
 844         lscsi_status = scsi_status & STATUS_MASK;
 845         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 846         CMD_COMPL_STATUS(cp) = comp_status;
 847         CMD_SCSI_STATUS(cp) = scsi_status;
 848
 849         fcport = sp->fcport;
 850
 851         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 852         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 853                 sense_len = le32_to_cpu(sts24->sense_len);
 854                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 855                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 856                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 857                 rsp_info = sts24->data;
 858                 sense_data = sts24->data;
 859                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 860         } else {
 861                 sense_len = le16_to_cpu(sts->req_sense_length);
 862                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 863                 resid_len = le32_to_cpu(sts->residual_length);
 864                 rsp_info = sts->rsp_info;
 865                 sense_data = sts->req_sense_data;
 866         }
 867
 868         /* Check for any FCP transport errors. */
 869         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 870                 /* Sense data lies beyond any FCP RESPONSE data. */
 871                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 872                         sense_data += rsp_info_len;
 873                 if (rsp_info_len > 3 && rsp_info[3]) {
 874                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 875                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 876                             "retrying command\n", ha->host_no,
 877                             cp->device->channel, cp->device->id,
 878                             cp->device->lun, rsp_info_len, rsp_info[0],
 879                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 880                             rsp_info[5], rsp_info[6], rsp_info[7]));
 881
 882                         cp->result = DID_BUS_BUSY << 16;
 883                         qla2x00_sp_compl(ha, sp);
 884                         return;
 885                 }
 886         }
 887
 888         /*
 889          * Based on Host and scsi status generate status code for Linux
 890          */
 891         switch (comp_status) {
 892         case CS_COMPLETE:
 893         case CS_QUEUE_FULL:
 894                 if (scsi_status == 0) {
 895                         cp->result = DID_OK << 16;
 896                         break;
 897                 }
 898                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 899                         resid = resid_len;
 900                         cp->resid = resid;
 901                         CMD_RESID_LEN(cp) = resid;
 902
 903                         if (!lscsi_status &&
 904                             ((unsigned)(cp->request_bufflen - resid) <
 905                              cp->underflow)) {
 906                                 qla_printk(KERN_INFO, ha,
 907                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 908                                     "detected (%x of %x bytes)...returning "
 909                                     "error status.\n", ha->host_no,
 910                                     cp->device->channel, cp->device->id,
 911                                     cp->device->lun, resid,
 912                                     cp->request_bufflen);
 913
 914                                 cp->result = DID_ERROR << 16;
 915                                 break;
 916                         }
 917                 }
 918                 cp->result = DID_OK << 16 | lscsi_status;
 919
 920                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
 921                         DEBUG2(printk(KERN_INFO
 922                             "scsi(%ld): QUEUE FULL status detected "
 923                             "0x%x-0x%x.\n", ha->host_no, comp_status,
 924                             scsi_status));
 925
 926                         /* Adjust queue depth for all luns on the port. */
 927                         fcport->last_queue_full = jiffies;
 928                         spin_unlock_irq(&ha->hardware_lock);
 929                         starget_for_each_device(cp->device->sdev_target,
 930                             fcport, qla2x00_adjust_sdev_qdepth_down);
 931                         spin_lock_irq(&ha->hardware_lock);
 932                         break;
 933                 }
 934                 if (lscsi_status != SS_CHECK_CONDITION)
 935                         break;
 936
 937                 /* Copy Sense Data into sense buffer. */
 938                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 939
 940                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 941                         break;
 942
 943                 if (sense_len >= sizeof(cp->sense_buffer))
 944                         sense_len = sizeof(cp->sense_buffer);
 945
 946                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 947                 sp->request_sense_length = sense_len;
 948                 sp->request_sense_ptr = cp->sense_buffer;
 949
 950                 if (sp->request_sense_length > 32)
 951                         sense_len = 32;
 952
 953                 memcpy(cp->sense_buffer, sense_data, sense_len);
 954
 955                 sp->request_sense_ptr += sense_len;
 956                 sp->request_sense_length -= sense_len;
 957                 if (sp->request_sense_length != 0)
 958                         ha->status_srb = sp;
 959
 960                 DEBUG5(printk("%s(): Check condition Sense data, "
 961                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 962                     ha->host_no, cp->device->channel, cp->device->id,
 963                     cp->device->lun, cp, cp->serial_number));
 964                 if (sense_len)
 965                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 966                             CMD_ACTUAL_SNSLEN(cp)));
 967                 break;
 968
 969         case CS_DATA_UNDERRUN:
 970                 resid = resid_len;
 971                 /* Use F/W calculated residual length. */
 972                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 973                         resid = fw_resid_len;
 974
 975                 if (scsi_status & SS_RESIDUAL_UNDER) {
 976                         cp->resid = resid;
 977                         CMD_RESID_LEN(cp) = resid;
 978                 } else {
 979                         DEBUG2(printk(KERN_INFO
 980                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 981                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 982                             "os_underflow=0x%x\n", ha->host_no,
 983                             cp->device->id, cp->device->lun, comp_status,
 984                             scsi_status, resid_len, resid, cp->cmnd[0],
 985                             cp->underflow));
 986
 987                 }
 988
 989                 /*
 990                  * Check to see if SCSI Status is non zero. If so report SCSI
 991                  * Status.
 992                  */
 993                 if (lscsi_status != 0) {
 994                         cp->result = DID_OK << 16 | lscsi_status;
 995
 996                         if (lscsi_status != SS_CHECK_CONDITION)
 997                                 break;
 998
 999                         /* Copy Sense Data into sense buffer */
1000                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1001
1002                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1003                                 break;
1004
1005                         if (sense_len >= sizeof(cp->sense_buffer))
1006                                 sense_len = sizeof(cp->sense_buffer);
1007
1008                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1009                         sp->request_sense_length = sense_len;
1010                         sp->request_sense_ptr = cp->sense_buffer;
1011
1012                         if (sp->request_sense_length > 32)
1013                                 sense_len = 32;
1014
1015                         memcpy(cp->sense_buffer, sense_data, sense_len);
1016
1017                         sp->request_sense_ptr += sense_len;
1018                         sp->request_sense_length -= sense_len;
1019                         if (sp->request_sense_length != 0)
1020                                 ha->status_srb = sp;
1021
1022                         DEBUG5(printk("%s(): Check condition Sense data, "
1023                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1024                             __func__, ha->host_no, cp->device->channel,
1025                             cp->device->id, cp->device->lun, cp,
1026                             cp->serial_number));
1027
1028                         if (sense_len)
1029                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1030                                     CMD_ACTUAL_SNSLEN(cp)));
1031                 } else {
1032                         /*
1033                          * If RISC reports underrun and target does not report
1034                          * it then we must have a lost frame, so tell upper
1035                          * layer to retry it by reporting a bus busy.
1036                          */
1037                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1038                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1039                                     "frame(s) detected (%x of %x bytes)..."
1040                                     "retrying command.\n", ha->host_no,
1041                                     cp->device->channel, cp->device->id,
1042                                     cp->device->lun, resid,
1043                                     cp->request_bufflen));
1044
1045                                 cp->result = DID_BUS_BUSY << 16;
1046                                 break;
1047                         }
1048
1049                         /* Handle mid-layer underflow */
1050                         if ((unsigned)(cp->request_bufflen - resid) <
1051                             cp->underflow) {
1052                                 qla_printk(KERN_INFO, ha,
1053                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1054                                     "detected (%x of %x bytes)...returning "
1055                                     "error status.\n", ha->host_no,
1056                                     cp->device->channel, cp->device->id,
1057                                     cp->device->lun, resid,
1058                                     cp->request_bufflen);
1059
1060                                 cp->result = DID_ERROR << 16;
1061                                 break;
1062                         }
1063
1064                         /* Everybody online, looking good... */
1065                         cp->result = DID_OK << 16;
1066                 }
1067                 break;
1068
1069         case CS_DATA_OVERRUN:
1070                 DEBUG2(printk(KERN_INFO
1071                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1072                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1073                     scsi_status));
1074                 DEBUG2(printk(KERN_INFO
1075                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1076                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1077                     cp->cmnd[4], cp->cmnd[5]));
1078                 DEBUG2(printk(KERN_INFO
1079                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1080                     "status!\n",
1081                     cp->serial_number, cp->request_bufflen, resid_len));
1082
1083                 cp->result = DID_ERROR << 16;
1084                 break;
1085
1086         case CS_PORT_LOGGED_OUT:
1087         case CS_PORT_CONFIG_CHG:
1088         case CS_PORT_BUSY:
1089         case CS_INCOMPLETE:
1090         case CS_PORT_UNAVAILABLE:
1091                 /*
1092                  * If the port is in Target Down state, return all IOs for this
1093                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1094                  * retry_queue.
1095                  */
1096                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1097                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1098                     ha->host_no, cp->device->id, cp->device->lun,
1099                     cp->serial_number, comp_status,
1100                     atomic_read(&fcport->state)));
1101
1102                 cp->result = DID_BUS_BUSY << 16;
1103                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1104                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1105                 }
1106                 break;
1107
1108         case CS_RESET:
1109                 DEBUG2(printk(KERN_INFO
1110                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1111                     ha->host_no, comp_status, scsi_status));
1112
1113                 cp->result = DID_RESET << 16;
1114                 break;
1115
1116         case CS_ABORTED:
1117                 /*
1118                  * hv2.19.12 - DID_ABORT does not retry the request if we
1119                  * aborted this request then abort otherwise it must be a
1120                  * reset.
1121                  */
1122                 DEBUG2(printk(KERN_INFO
1123                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1124                     ha->host_no, comp_status, scsi_status));
1125
1126                 cp->result = DID_RESET << 16;
1127                 break;
1128
1129         case CS_TIMEOUT:
1130                 cp->result = DID_BUS_BUSY << 16;
1131
1132                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1133                         DEBUG2(printk(KERN_INFO
1134                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1135                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1136                             cp->device->id, cp->device->lun, comp_status,
1137                             scsi_status));
1138                         break;
1139                 }
1140                 DEBUG2(printk(KERN_INFO
1141                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1142                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1143                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1144                     le16_to_cpu(sts->status_flags)));
1145
1146                 /* Check to see if logout occurred. */
1147                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1148                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1149                 break;
1150
1151         default:
1152                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1153                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1154                 qla_printk(KERN_INFO, ha,
1155                     "Unknown status detected 0x%x-0x%x.\n",
1156                     comp_status, scsi_status);
1157
1158                 cp->result = DID_ERROR << 16;
1159                 break;
1160         }
1161
1162         /* Place command on done queue. */
1163         if (ha->status_srb == NULL)
1164                 qla2x00_sp_compl(ha, sp);
1165 }
1166
1167 /**
1168  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1169  * @ha: SCSI driver HA context
1170  * @pkt: Entry pointer
1171  *
1172  * Extended sense data.
1173  */
1174 static void
1175 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1176 {
1177         uint8_t         sense_sz = 0;
1178         srb_t           *sp = ha->status_srb;
1179         struct scsi_cmnd *cp;
1180
1181         if (sp != NULL && sp->request_sense_length != 0) {
1182                 cp = sp->cmd;
1183                 if (cp == NULL) {
1184                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1185                             "sp=%p.\n", __func__, sp));
1186                         qla_printk(KERN_INFO, ha,
1187                             "cmd is NULL: already returned to OS (sp=%p)\n",
1188                             sp);
1189
1190                         ha->status_srb = NULL;
1191                         return;
1192                 }
1193
1194                 if (sp->request_sense_length > sizeof(pkt->data)) {
1195                         sense_sz = sizeof(pkt->data);
1196                 } else {
1197                         sense_sz = sp->request_sense_length;
1198                 }
1199
1200                 /* Move sense data. */
1201                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1202                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1203                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1204                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1205
1206                 sp->request_sense_ptr += sense_sz;
1207                 sp->request_sense_length -= sense_sz;
1208
1209                 /* Place command on done queue. */
1210                 if (sp->request_sense_length == 0) {
1211                         ha->status_srb = NULL;
1212                         qla2x00_sp_compl(ha, sp);
1213                 }
1214         }
1215 }
1216
1217 /**
1218  * qla2x00_error_entry() - Process an error entry.
1219  * @ha: SCSI driver HA context
1220  * @pkt: Entry pointer
1221  */
1222 static void
1223 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1224 {
1225         srb_t *sp;
1226
1227 #if defined(QL_DEBUG_LEVEL_2)
1228         if (pkt->entry_status & RF_INV_E_ORDER)
1229                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1230         else if (pkt->entry_status & RF_INV_E_COUNT)
1231                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1232         else if (pkt->entry_status & RF_INV_E_PARAM)
1233                 qla_printk(KERN_ERR, ha,
1234                     "%s: Invalid Entry Parameter\n", __func__);
1235         else if (pkt->entry_status & RF_INV_E_TYPE)
1236                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1237         else if (pkt->entry_status & RF_BUSY)
1238                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1239         else
1240                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1241 #endif
1242
1243         /* Validate handle. */
1244         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1245                 sp = ha->outstanding_cmds[pkt->handle];
1246         else
1247                 sp = NULL;
1248
1249         if (sp) {
1250                 /* Free outstanding command slot. */
1251                 ha->outstanding_cmds[pkt->handle] = NULL;
1252
1253                 /* Bad payload or header */
1254                 if (pkt->entry_status &
1255                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1256                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1257                         sp->cmd->result = DID_ERROR << 16;
1258                 } else if (pkt->entry_status & RF_BUSY) {
1259                         sp->cmd->result = DID_BUS_BUSY << 16;
1260                 } else {
1261                         sp->cmd->result = DID_ERROR << 16;
1262                 }
1263                 qla2x00_sp_compl(ha, sp);
1264
1265         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1266             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1267                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1268                     ha->host_no));
1269                 qla_printk(KERN_WARNING, ha,
1270                     "Error entry - invalid handle\n");
1271
1272                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1273                 qla2xxx_wake_dpc(ha);
1274         }
1275 }
1276
1277 /**
1278  * qla2x00_ms_entry() - Process a Management Server entry.
1279  * @ha: SCSI driver HA context
1280  * @index: Response queue out pointer
1281  */
1282 static void
1283 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1284 {
1285         srb_t          *sp;
1286
1287         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1288             __func__, ha->host_no, pkt, pkt->handle1));
1289
1290         /* Validate handle. */
1291         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1292                 sp = ha->outstanding_cmds[pkt->handle1];
1293         else
1294                 sp = NULL;
1295
1296         if (sp == NULL) {
1297                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1298                     ha->host_no));
1299                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1300
1301                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1302                 return;
1303         }
1304
1305         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1306         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1307
1308         /* Free outstanding command slot. */
1309         ha->outstanding_cmds[pkt->handle1] = NULL;
1310
1311         qla2x00_sp_compl(ha, sp);
1312 }
1313
1314
1315 /**
1316  * qla24xx_mbx_completion() - Process mailbox command completions.
1317  * @ha: SCSI driver HA context
1318  * @mb0: Mailbox0 register
1319  */
1320 static void
1321 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1322 {
1323         uint16_t        cnt;
1324         uint16_t __iomem *wptr;
1325         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1326
1327         /* Load return mailbox registers. */
1328         ha->flags.mbox_int = 1;
1329         ha->mailbox_out[0] = mb0;
1330         wptr = (uint16_t __iomem *)&reg->mailbox1;
1331
1332         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1333                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1334                 wptr++;
1335         }
1336
1337         if (ha->mcp) {
1338                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1339                     __func__, ha->host_no, ha->mcp->mb[0]));
1340         } else {
1341                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1342                     __func__, ha->host_no));
1343         }
1344 }
1345
1346 /**
1347  * qla24xx_process_response_queue() - Process response queue entries.
1348  * @ha: SCSI driver HA context
1349  */
1350 void
1351 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1352 {
1353         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1354         struct sts_entry_24xx *pkt;
1355
1356         if (!ha->flags.online)
1357                 return;
1358
1359         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1360                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1361
1362                 ha->rsp_ring_index++;
1363                 if (ha->rsp_ring_index == ha->response_q_length) {
1364                         ha->rsp_ring_index = 0;
1365                         ha->response_ring_ptr = ha->response_ring;
1366                 } else {
1367                         ha->response_ring_ptr++;
1368                 }
1369
1370                 if (pkt->entry_status != 0) {
1371                         DEBUG3(printk(KERN_INFO
1372                             "scsi(%ld): Process error entry.\n", ha->host_no));
1373
1374                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1375                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1376                         wmb();
1377                         continue;
1378                 }
1379
1380                 switch (pkt->entry_type) {
1381                 case STATUS_TYPE:
1382                         qla2x00_status_entry(ha, pkt);
1383                         break;
1384                 case STATUS_CONT_TYPE:
1385                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1386                         break;
1387                 case MS_IOCB_TYPE:
1388                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1389                         break;
1390                 default:
1391                         /* Type Not Supported. */
1392                         DEBUG4(printk(KERN_WARNING
1393                             "scsi(%ld): Received unknown response pkt type %x "
1394                             "entry status=%x.\n",
1395                             ha->host_no, pkt->entry_type, pkt->entry_status));
1396                         break;
1397                 }
1398                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1399                 wmb();
1400         }
1401
1402         /* Adjust ring index */
1403         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1404 }
1405
1406 /**
1407  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1408  * @irq:
1409  * @dev_id: SCSI driver HA context
1410  *
1411  * Called by system whenever the host adapter generates an interrupt.
1412  *
1413  * Returns handled flag.
1414  */
1415 irqreturn_t
1416 qla24xx_intr_handler(int irq, void *dev_id)
1417 {
1418         scsi_qla_host_t *ha;
1419         struct device_reg_24xx __iomem *reg;
1420         int             status;
1421         unsigned long   flags;
1422         unsigned long   iter;
1423         uint32_t        stat;
1424         uint32_t        hccr;
1425         uint16_t        mb[4];
1426
1427         ha = (scsi_qla_host_t *) dev_id;
1428         if (!ha) {
1429                 printk(KERN_INFO
1430                     "%s(): NULL host pointer\n", __func__);
1431                 return IRQ_NONE;
1432         }
1433
1434         reg = &ha->iobase->isp24;
1435         status = 0;
1436
1437         spin_lock_irqsave(&ha->hardware_lock, flags);
1438         for (iter = 50; iter--; ) {
1439                 stat = RD_REG_DWORD(&reg->host_status);
1440                 if (stat & HSRX_RISC_PAUSED) {
1441                         hccr = RD_REG_DWORD(&reg->hccr);
1442
1443                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1444                             "Dumping firmware!\n", hccr);
1445                         qla24xx_fw_dump(ha, 1);
1446
1447                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1448                         break;
1449                 } else if ((stat & HSRX_RISC_INT) == 0)
1450                         break;
1451
1452                 switch (stat & 0xff) {
1453                 case 0x1:
1454                 case 0x2:
1455                 case 0x10:
1456                 case 0x11:
1457                         qla24xx_mbx_completion(ha, MSW(stat));
1458                         status |= MBX_INTERRUPT;
1459
1460                         break;
1461                 case 0x12:
1462                         mb[0] = MSW(stat);
1463                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1464                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1465                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1466                         qla2x00_async_event(ha, mb);
1467                         break;
1468                 case 0x13:
1469                         qla24xx_process_response_queue(ha);
1470                         break;
1471                 default:
1472                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1473                             "(%d).\n",
1474                             ha->host_no, stat & 0xff));
1475                         break;
1476                 }
1477                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1478                 RD_REG_DWORD_RELAXED(&reg->hccr);
1479         }
1480         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1481
1482         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1483             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1484                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1485
1486                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1487                 up(&ha->mbx_intr_sem);
1488
1489                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1490         }
1491
1492         return IRQ_HANDLED;
1493 }
1494
1495 /**
1496  * qla24xx_ms_entry() - Process a Management Server entry.
1497  * @ha: SCSI driver HA context
1498  * @index: Response queue out pointer
1499  */
1500 static void
1501 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1502 {
1503         srb_t          *sp;
1504
1505         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1506             __func__, ha->host_no, pkt, pkt->handle));
1507
1508         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1509         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1510
1511         /* Validate handle. */
1512         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1513                 sp = ha->outstanding_cmds[pkt->handle];
1514         else
1515                 sp = NULL;
1516
1517         if (sp == NULL) {
1518                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1519                     ha->host_no));
1520                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1521                     ha->host_no));
1522                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1523                     pkt->handle);
1524
1525                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1526                 return;
1527         }
1528
1529         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1530         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1531
1532         /* Free outstanding command slot. */
1533         ha->outstanding_cmds[pkt->handle] = NULL;
1534
1535         qla2x00_sp_compl(ha, sp);
1536 }
1537