git.oblomov.eu Git - linux-2.6/blob - 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 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  10 static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
  11 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  12 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  13 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  14 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  15 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  16
  17 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
  18
  19 /**
  20  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  21  * @irq:
  22  * @dev_id: SCSI driver HA context
  23  * @regs:
  24  *
  25  * Called by system whenever the host adapter generates an interrupt.
  26  *
  27  * Returns handled flag.
  28  */
  29 irqreturn_t
  30 qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
  31 {
  32         scsi_qla_host_t *ha;
  33         struct device_reg_2xxx __iomem *reg;
  34         int             status;
  35         unsigned long   flags;
  36         unsigned long   iter;
  37         uint16_t        mb[4];
  38
  39         ha = (scsi_qla_host_t *) dev_id;
  40         if (!ha) {
  41                 printk(KERN_INFO
  42                     "%s(): NULL host pointer\n", __func__);
  43                 return (IRQ_NONE);
  44         }
  45
  46         reg = &ha->iobase->isp;
  47         status = 0;
  48
  49         spin_lock_irqsave(&ha->hardware_lock, flags);
  50         for (iter = 50; iter--; ) {
  51                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  52                         break;
  53
  54                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  55                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  56                         RD_REG_WORD(&reg->hccr);
  57
  58                         /* Get mailbox data. */
  59                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  60                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  61                                 qla2x00_mbx_completion(ha, mb[0]);
  62                                 status |= MBX_INTERRUPT;
  63                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  64                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  65                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  66                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  67                                 qla2x00_async_event(ha, mb);
  68                         } else {
  69                                 /*EMPTY*/
  70                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  71                                     "interrupt type (%d).\n",
  72                                     ha->host_no, mb[0]));
  73                         }
  74                         /* Release mailbox registers. */
  75                         WRT_REG_WORD(&reg->semaphore, 0);
  76                         RD_REG_WORD(&reg->semaphore);
  77                 } else {
  78                         qla2x00_process_response_queue(ha);
  79
  80                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  81                         RD_REG_WORD(&reg->hccr);
  82                 }
  83         }
  84         spin_unlock_irqrestore(&ha->hardware_lock, flags);
  85
  86         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
  87             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
  88                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
  89
  90                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  91                 up(&ha->mbx_intr_sem);
  92
  93                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
  94         }
  95
  96         return (IRQ_HANDLED);
  97 }
  98
  99 /**
 100  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 101  * @irq:
 102  * @dev_id: SCSI driver HA context
 103  * @regs:
 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, struct pt_regs *regs)
 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
 399                 /* Update AEN queue. */
 400                 qla2x00_enqueue_aen(ha, MBA_LIP_OCCURRED, NULL);
 401
 402                 break;
 403
 404         case MBA_LOOP_UP:               /* Loop Up Event */
 405                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 406                         link_speed = link_speeds[0];
 407                         ha->link_data_rate = LDR_1GB;
 408                 } else {
 409                         link_speed = link_speeds[LS_UNKNOWN];
 410                         if (mb[1] < 5)
 411                                 link_speed = link_speeds[mb[1]];
 412                         ha->link_data_rate = mb[1];
 413                 }
 414
 415                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 416                     ha->host_no, link_speed));
 417                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 418                     link_speed);
 419
 420                 ha->flags.management_server_logged_in = 0;
 421
 422                 /* Update AEN queue. */
 423                 qla2x00_enqueue_aen(ha, MBA_LOOP_UP, NULL);
 424                 break;
 425
 426         case MBA_LOOP_DOWN:             /* Loop Down Event */
 427                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 428                     ha->host_no, mb[1]));
 429                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 430
 431                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 432                         atomic_set(&ha->loop_state, LOOP_DOWN);
 433                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 434                         ha->device_flags |= DFLG_NO_CABLE;
 435                         qla2x00_mark_all_devices_lost(ha, 1);
 436                 }
 437
 438                 ha->flags.management_server_logged_in = 0;
 439                 ha->link_data_rate = LDR_UNKNOWN;
 440                 if (ql2xfdmienable)
 441                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 442
 443                 /* Update AEN queue. */
 444                 qla2x00_enqueue_aen(ha, MBA_LOOP_DOWN, NULL);
 445                 break;
 446
 447         case MBA_LIP_RESET:             /* LIP reset occurred */
 448                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 449                     ha->host_no, mb[1]));
 450                 qla_printk(KERN_INFO, ha,
 451                     "LIP reset occured (%x).\n", mb[1]);
 452
 453                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 454                         atomic_set(&ha->loop_state, LOOP_DOWN);
 455                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 456                         qla2x00_mark_all_devices_lost(ha, 1);
 457                 }
 458
 459                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 460
 461                 ha->operating_mode = LOOP;
 462                 ha->flags.management_server_logged_in = 0;
 463
 464                 /* Update AEN queue. */
 465                 qla2x00_enqueue_aen(ha, MBA_LIP_RESET, NULL);
 466
 467                 break;
 468
 469         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 470                 if (IS_QLA2100(ha))
 471                         break;
 472
 473                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 474                     ha->host_no));
 475
 476                 /*
 477                  * Until there's a transition from loop down to loop up, treat
 478                  * this as loop down only.
 479                  */
 480                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 481                         atomic_set(&ha->loop_state, LOOP_DOWN);
 482                         if (!atomic_read(&ha->loop_down_timer))
 483                                 atomic_set(&ha->loop_down_timer,
 484                                     LOOP_DOWN_TIME);
 485                         qla2x00_mark_all_devices_lost(ha, 1);
 486                 }
 487
 488                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 489                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 490                 }
 491                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 492                 break;
 493
 494         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 495                 if (IS_QLA2100(ha))
 496                         break;
 497
 498                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 499                     "received.\n",
 500                     ha->host_no));
 501                 qla_printk(KERN_INFO, ha,
 502                     "Configuration change detected: value=%x.\n", mb[1]);
 503
 504                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 505                         atomic_set(&ha->loop_state, LOOP_DOWN);
 506                         if (!atomic_read(&ha->loop_down_timer))
 507                                 atomic_set(&ha->loop_down_timer,
 508                                     LOOP_DOWN_TIME);
 509                         qla2x00_mark_all_devices_lost(ha, 1);
 510                 }
 511
 512                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 513                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 514                 break;
 515
 516         case MBA_PORT_UPDATE:           /* Port database update */
 517                 /*
 518                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 519                  * event etc. earlier indicating loop is down) then process
 520                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 521                  */
 522                 atomic_set(&ha->loop_down_timer, 0);
 523                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 524                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 525                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 526                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 527                             mb[2], mb[3]));
 528                         break;
 529                 }
 530
 531                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 532                     ha->host_no));
 533                 DEBUG(printk(KERN_INFO
 534                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 535                     ha->host_no, mb[1], mb[2], mb[3]));
 536
 537                 /*
 538                  * Mark all devices as missing so we will login again.
 539                  */
 540                 atomic_set(&ha->loop_state, LOOP_UP);
 541
 542                 qla2x00_mark_all_devices_lost(ha, 1);
 543
 544                 ha->flags.rscn_queue_overflow = 1;
 545
 546                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 547                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 548
 549                 /* Update AEN queue. */
 550                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
 551                 break;
 552
 553         case MBA_RSCN_UPDATE:           /* State Change Registration */
 554                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 555                     ha->host_no));
 556                 DEBUG(printk(KERN_INFO
 557                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 558                     ha->host_no, mb[1], mb[2]));
 559
 560                 rscn_entry = (mb[1] << 16) | mb[2];
 561                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 562                     ha->d_id.b.al_pa;
 563                 if (rscn_entry == host_pid) {
 564                         DEBUG(printk(KERN_INFO
 565                             "scsi(%ld): Ignoring RSCN update to local host "
 566                             "port ID (%06x)\n",
 567                             ha->host_no, host_pid));
 568                         break;
 569                 }
 570
 571                 rscn_queue_index = ha->rscn_in_ptr + 1;
 572                 if (rscn_queue_index == MAX_RSCN_COUNT)
 573                         rscn_queue_index = 0;
 574                 if (rscn_queue_index != ha->rscn_out_ptr) {
 575                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 576                         ha->rscn_in_ptr = rscn_queue_index;
 577                 } else {
 578                         ha->flags.rscn_queue_overflow = 1;
 579                 }
 580
 581                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 582                 atomic_set(&ha->loop_down_timer, 0);
 583                 ha->flags.management_server_logged_in = 0;
 584
 585                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 586                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 587
 588                 /* Update AEN queue. */
 589                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
 590                 break;
 591
 592         /* case MBA_RIO_RESPONSE: */
 593         case MBA_ZIO_RESPONSE:
 594                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 595                     ha->host_no));
 596                 DEBUG(printk(KERN_INFO
 597                     "scsi(%ld): [R|Z]IO update completion.\n",
 598                     ha->host_no));
 599
 600                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 601                         qla24xx_process_response_queue(ha);
 602                 else
 603                         qla2x00_process_response_queue(ha);
 604                 break;
 605
 606         case MBA_DISCARD_RND_FRAME:
 607                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 608                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 609                 break;
 610         }
 611 }
 612
 613 /**
 614  * qla2x00_process_completed_request() - Process a Fast Post response.
 615  * @ha: SCSI driver HA context
 616  * @index: SRB index
 617  */
 618 static void
 619 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 620 {
 621         srb_t *sp;
 622
 623         /* Validate handle. */
 624         if (index >= MAX_OUTSTANDING_COMMANDS) {
 625                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 626                     ha->host_no, index));
 627                 qla_printk(KERN_WARNING, ha,
 628                     "Invalid SCSI completion handle %d.\n", index);
 629
 630                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 631                 return;
 632         }
 633
 634         sp = ha->outstanding_cmds[index];
 635         if (sp) {
 636                 /* Free outstanding command slot. */
 637                 ha->outstanding_cmds[index] = NULL;
 638
 639                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 640                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 641
 642                 /* Save ISP completion status */
 643                 sp->cmd->result = DID_OK << 16;
 644                 qla2x00_sp_compl(ha, sp);
 645         } else {
 646                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 647                     ha->host_no));
 648                 qla_printk(KERN_WARNING, ha,
 649                     "Invalid ISP SCSI completion handle\n");
 650
 651                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 652         }
 653 }
 654
 655 /**
 656  * qla2x00_process_response_queue() - Process response queue entries.
 657  * @ha: SCSI driver HA context
 658  */
 659 void
 660 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 661 {
 662         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 663         sts_entry_t     *pkt;
 664         uint16_t        handle_cnt;
 665         uint16_t        cnt;
 666
 667         if (!ha->flags.online)
 668                 return;
 669
 670         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 671                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 672
 673                 ha->rsp_ring_index++;
 674                 if (ha->rsp_ring_index == ha->response_q_length) {
 675                         ha->rsp_ring_index = 0;
 676                         ha->response_ring_ptr = ha->response_ring;
 677                 } else {
 678                         ha->response_ring_ptr++;
 679                 }
 680
 681                 if (pkt->entry_status != 0) {
 682                         DEBUG3(printk(KERN_INFO
 683                             "scsi(%ld): Process error entry.\n", ha->host_no));
 684
 685                         qla2x00_error_entry(ha, pkt);
 686                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 687                         wmb();
 688                         continue;
 689                 }
 690
 691                 switch (pkt->entry_type) {
 692                 case STATUS_TYPE:
 693                         qla2x00_status_entry(ha, pkt);
 694                         break;
 695                 case STATUS_TYPE_21:
 696                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 697                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 698                                 qla2x00_process_completed_request(ha,
 699                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 700                         }
 701                         break;
 702                 case STATUS_TYPE_22:
 703                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 704                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 705                                 qla2x00_process_completed_request(ha,
 706                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 707                         }
 708                         break;
 709                 case STATUS_CONT_TYPE:
 710                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 711                         break;
 712                 case MS_IOCB_TYPE:
 713                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 714                         break;
 715                 default:
 716                         /* Type Not Supported. */
 717                         DEBUG4(printk(KERN_WARNING
 718                             "scsi(%ld): Received unknown response pkt type %x "
 719                             "entry status=%x.\n",
 720                             ha->host_no, pkt->entry_type, pkt->entry_status));
 721                         break;
 722                 }
 723                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 724                 wmb();
 725         }
 726
 727         /* Adjust ring index */
 728         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 729 }
 730
 731 /**
 732  * qla2x00_status_entry() - Process a Status IOCB entry.
 733  * @ha: SCSI driver HA context
 734  * @pkt: Entry pointer
 735  */
 736 static void
 737 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 738 {
 739         srb_t           *sp;
 740         fc_port_t       *fcport;
 741         struct scsi_cmnd *cp;
 742         sts_entry_t *sts;
 743         struct sts_entry_24xx *sts24;
 744         uint16_t        comp_status;
 745         uint16_t        scsi_status;
 746         uint8_t         lscsi_status;
 747         int32_t         resid;
 748         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 749         uint8_t         *rsp_info, *sense_data;
 750
 751         sts = (sts_entry_t *) pkt;
 752         sts24 = (struct sts_entry_24xx *) pkt;
 753         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 754                 comp_status = le16_to_cpu(sts24->comp_status);
 755                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 756         } else {
 757                 comp_status = le16_to_cpu(sts->comp_status);
 758                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 759         }
 760
 761         /* Fast path completion. */
 762         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 763                 qla2x00_process_completed_request(ha, sts->handle);
 764
 765                 return;
 766         }
 767
 768         /* Validate handle. */
 769         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 770                 sp = ha->outstanding_cmds[sts->handle];
 771                 ha->outstanding_cmds[sts->handle] = NULL;
 772         } else
 773                 sp = NULL;
 774
 775         if (sp == NULL) {
 776                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 777                     ha->host_no));
 778                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 779
 780                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 781                 qla2xxx_wake_dpc(ha);
 782                 return;
 783         }
 784         cp = sp->cmd;
 785         if (cp == NULL) {
 786                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 787                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 788                 qla_printk(KERN_WARNING, ha,
 789                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 790
 791                 return;
 792         }
 793
 794         lscsi_status = scsi_status & STATUS_MASK;
 795         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 796         CMD_COMPL_STATUS(cp) = comp_status;
 797         CMD_SCSI_STATUS(cp) = scsi_status;
 798
 799         fcport = sp->fcport;
 800
 801         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 802         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 803                 sense_len = le32_to_cpu(sts24->sense_len);
 804                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 805                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 806                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 807                 rsp_info = sts24->data;
 808                 sense_data = sts24->data;
 809                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 810         } else {
 811                 sense_len = le16_to_cpu(sts->req_sense_length);
 812                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 813                 resid_len = le32_to_cpu(sts->residual_length);
 814                 rsp_info = sts->rsp_info;
 815                 sense_data = sts->req_sense_data;
 816         }
 817
 818         /* Check for any FCP transport errors. */
 819         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 820                 /* Sense data lies beyond any FCP RESPONSE data. */
 821                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 822                         sense_data += rsp_info_len;
 823                 if (rsp_info_len > 3 && rsp_info[3]) {
 824                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 825                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 826                             "retrying command\n", ha->host_no,
 827                             cp->device->channel, cp->device->id,
 828                             cp->device->lun, rsp_info_len, rsp_info[0],
 829                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 830                             rsp_info[5], rsp_info[6], rsp_info[7]));
 831
 832                         cp->result = DID_BUS_BUSY << 16;
 833                         qla2x00_sp_compl(ha, sp);
 834                         return;
 835                 }
 836         }
 837
 838         /*
 839          * Based on Host and scsi status generate status code for Linux
 840          */
 841         switch (comp_status) {
 842         case CS_COMPLETE:
 843                 if (scsi_status == 0) {
 844                         cp->result = DID_OK << 16;
 845                         break;
 846                 }
 847                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 848                         resid = resid_len;
 849                         cp->resid = resid;
 850                         CMD_RESID_LEN(cp) = resid;
 851
 852                         if (!lscsi_status &&
 853                             ((unsigned)(cp->request_bufflen - resid) <
 854                              cp->underflow)) {
 855                                 qla_printk(KERN_INFO, ha,
 856                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 857                                     "detected (%x of %x bytes)...returning "
 858                                     "error status.\n", ha->host_no,
 859                                     cp->device->channel, cp->device->id,
 860                                     cp->device->lun, resid,
 861                                     cp->request_bufflen);
 862
 863                                 cp->result = DID_ERROR << 16;
 864                                 break;
 865                         }
 866                 }
 867                 cp->result = DID_OK << 16 | lscsi_status;
 868
 869                 if (lscsi_status != SS_CHECK_CONDITION)
 870                         break;
 871
 872                 /* Copy Sense Data into sense buffer. */
 873                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 874
 875                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 876                         break;
 877
 878                 if (sense_len >= sizeof(cp->sense_buffer))
 879                         sense_len = sizeof(cp->sense_buffer);
 880
 881                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 882                 sp->request_sense_length = sense_len;
 883                 sp->request_sense_ptr = cp->sense_buffer;
 884
 885                 if (sp->request_sense_length > 32)
 886                         sense_len = 32;
 887
 888                 memcpy(cp->sense_buffer, sense_data, sense_len);
 889
 890                 sp->request_sense_ptr += sense_len;
 891                 sp->request_sense_length -= sense_len;
 892                 if (sp->request_sense_length != 0)
 893                         ha->status_srb = sp;
 894
 895                 DEBUG5(printk("%s(): Check condition Sense data, "
 896                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 897                     ha->host_no, cp->device->channel, cp->device->id,
 898                     cp->device->lun, cp, cp->serial_number));
 899                 if (sense_len)
 900                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 901                             CMD_ACTUAL_SNSLEN(cp)));
 902                 break;
 903
 904         case CS_DATA_UNDERRUN:
 905                 resid = resid_len;
 906                 /* Use F/W calculated residual length. */
 907                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 908                         resid = fw_resid_len;
 909
 910                 if (scsi_status & SS_RESIDUAL_UNDER) {
 911                         cp->resid = resid;
 912                         CMD_RESID_LEN(cp) = resid;
 913                 } else {
 914                         DEBUG2(printk(KERN_INFO
 915                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 916                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 917                             "os_underflow=0x%x\n", ha->host_no,
 918                             cp->device->id, cp->device->lun, comp_status,
 919                             scsi_status, resid_len, resid, cp->cmnd[0],
 920                             cp->underflow));
 921
 922                 }
 923
 924                 /*
 925                  * Check to see if SCSI Status is non zero. If so report SCSI
 926                  * Status.
 927                  */
 928                 if (lscsi_status != 0) {
 929                         cp->result = DID_OK << 16 | lscsi_status;
 930
 931                         if (lscsi_status != SS_CHECK_CONDITION)
 932                                 break;
 933
 934                         /* Copy Sense Data into sense buffer */
 935                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 936
 937                         if (!(scsi_status & SS_SENSE_LEN_VALID))
 938                                 break;
 939
 940                         if (sense_len >= sizeof(cp->sense_buffer))
 941                                 sense_len = sizeof(cp->sense_buffer);
 942
 943                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 944                         sp->request_sense_length = sense_len;
 945                         sp->request_sense_ptr = cp->sense_buffer;
 946
 947                         if (sp->request_sense_length > 32)
 948                                 sense_len = 32;
 949
 950                         memcpy(cp->sense_buffer, sense_data, sense_len);
 951
 952                         sp->request_sense_ptr += sense_len;
 953                         sp->request_sense_length -= sense_len;
 954                         if (sp->request_sense_length != 0)
 955                                 ha->status_srb = sp;
 956
 957                         DEBUG5(printk("%s(): Check condition Sense data, "
 958                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
 959                             __func__, ha->host_no, cp->device->channel,
 960                             cp->device->id, cp->device->lun, cp,
 961                             cp->serial_number));
 962
 963                         if (sense_len)
 964                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 965                                     CMD_ACTUAL_SNSLEN(cp)));
 966                 } else {
 967                         /*
 968                          * If RISC reports underrun and target does not report
 969                          * it then we must have a lost frame, so tell upper
 970                          * layer to retry it by reporting a bus busy.
 971                          */
 972                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
 973                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
 974                                     "frame(s) detected (%x of %x bytes)..."
 975                                     "retrying command.\n", ha->host_no,
 976                                     cp->device->channel, cp->device->id,
 977                                     cp->device->lun, resid,
 978                                     cp->request_bufflen));
 979
 980                                 cp->result = DID_BUS_BUSY << 16;
 981                                 break;
 982                         }
 983
 984                         /* Handle mid-layer underflow */
 985                         if ((unsigned)(cp->request_bufflen - resid) <
 986                             cp->underflow) {
 987                                 qla_printk(KERN_INFO, ha,
 988                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 989                                     "detected (%x of %x bytes)...returning "
 990                                     "error status.\n", ha->host_no,
 991                                     cp->device->channel, cp->device->id,
 992                                     cp->device->lun, resid,
 993                                     cp->request_bufflen);
 994
 995                                 cp->result = DID_ERROR << 16;
 996                                 break;
 997                         }
 998
 999                         /* Everybody online, looking good... */
1000                         cp->result = DID_OK << 16;
1001                 }
1002                 break;
1003
1004         case CS_DATA_OVERRUN:
1005                 DEBUG2(printk(KERN_INFO
1006                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1007                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1008                     scsi_status));
1009                 DEBUG2(printk(KERN_INFO
1010                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1011                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1012                     cp->cmnd[4], cp->cmnd[5]));
1013                 DEBUG2(printk(KERN_INFO
1014                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1015                     "status!\n",
1016                     cp->serial_number, cp->request_bufflen, resid_len));
1017
1018                 cp->result = DID_ERROR << 16;
1019                 break;
1020
1021         case CS_PORT_LOGGED_OUT:
1022         case CS_PORT_CONFIG_CHG:
1023         case CS_PORT_BUSY:
1024         case CS_INCOMPLETE:
1025         case CS_PORT_UNAVAILABLE:
1026                 /*
1027                  * If the port is in Target Down state, return all IOs for this
1028                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1029                  * retry_queue.
1030                  */
1031                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1032                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1033                     ha->host_no, cp->device->id, cp->device->lun,
1034                     cp->serial_number, comp_status,
1035                     atomic_read(&fcport->state)));
1036
1037                 cp->result = DID_BUS_BUSY << 16;
1038                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1039                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1040                 }
1041                 break;
1042
1043         case CS_RESET:
1044                 DEBUG2(printk(KERN_INFO
1045                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1046                     ha->host_no, comp_status, scsi_status));
1047
1048                 cp->result = DID_RESET << 16;
1049                 break;
1050
1051         case CS_ABORTED:
1052                 /*
1053                  * hv2.19.12 - DID_ABORT does not retry the request if we
1054                  * aborted this request then abort otherwise it must be a
1055                  * reset.
1056                  */
1057                 DEBUG2(printk(KERN_INFO
1058                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1059                     ha->host_no, comp_status, scsi_status));
1060
1061                 cp->result = DID_RESET << 16;
1062                 break;
1063
1064         case CS_TIMEOUT:
1065                 cp->result = DID_BUS_BUSY << 16;
1066
1067                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1068                         DEBUG2(printk(KERN_INFO
1069                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1070                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1071                             cp->device->id, cp->device->lun, comp_status,
1072                             scsi_status));
1073                         break;
1074                 }
1075                 DEBUG2(printk(KERN_INFO
1076                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1077                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1078                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1079                     le16_to_cpu(sts->status_flags)));
1080
1081                 /* Check to see if logout occurred. */
1082                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1083                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1084                 break;
1085
1086         case CS_QUEUE_FULL:
1087                 DEBUG2(printk(KERN_INFO
1088                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1089                     ha->host_no, comp_status, scsi_status));
1090
1091                 /* SCSI Mid-Layer handles device queue full */
1092
1093                 cp->result = DID_OK << 16 | lscsi_status;
1094
1095                 break;
1096
1097         default:
1098                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1099                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1100                 qla_printk(KERN_INFO, ha,
1101                     "Unknown status detected 0x%x-0x%x.\n",
1102                     comp_status, scsi_status);
1103
1104                 cp->result = DID_ERROR << 16;
1105                 break;
1106         }
1107
1108         /* Place command on done queue. */
1109         if (ha->status_srb == NULL)
1110                 qla2x00_sp_compl(ha, sp);
1111 }
1112
1113 /**
1114  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1115  * @ha: SCSI driver HA context
1116  * @pkt: Entry pointer
1117  *
1118  * Extended sense data.
1119  */
1120 static void
1121 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1122 {
1123         uint8_t         sense_sz = 0;
1124         srb_t           *sp = ha->status_srb;
1125         struct scsi_cmnd *cp;
1126
1127         if (sp != NULL && sp->request_sense_length != 0) {
1128                 cp = sp->cmd;
1129                 if (cp == NULL) {
1130                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1131                             "sp=%p.\n", __func__, sp));
1132                         qla_printk(KERN_INFO, ha,
1133                             "cmd is NULL: already returned to OS (sp=%p)\n",
1134                             sp);
1135
1136                         ha->status_srb = NULL;
1137                         return;
1138                 }
1139
1140                 if (sp->request_sense_length > sizeof(pkt->data)) {
1141                         sense_sz = sizeof(pkt->data);
1142                 } else {
1143                         sense_sz = sp->request_sense_length;
1144                 }
1145
1146                 /* Move sense data. */
1147                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1148                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1149                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1150                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1151
1152                 sp->request_sense_ptr += sense_sz;
1153                 sp->request_sense_length -= sense_sz;
1154
1155                 /* Place command on done queue. */
1156                 if (sp->request_sense_length == 0) {
1157                         ha->status_srb = NULL;
1158                         qla2x00_sp_compl(ha, sp);
1159                 }
1160         }
1161 }
1162
1163 /**
1164  * qla2x00_error_entry() - Process an error entry.
1165  * @ha: SCSI driver HA context
1166  * @pkt: Entry pointer
1167  */
1168 static void
1169 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1170 {
1171         srb_t *sp;
1172
1173 #if defined(QL_DEBUG_LEVEL_2)
1174         if (pkt->entry_status & RF_INV_E_ORDER)
1175                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1176         else if (pkt->entry_status & RF_INV_E_COUNT)
1177                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1178         else if (pkt->entry_status & RF_INV_E_PARAM)
1179                 qla_printk(KERN_ERR, ha,
1180                     "%s: Invalid Entry Parameter\n", __func__);
1181         else if (pkt->entry_status & RF_INV_E_TYPE)
1182                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1183         else if (pkt->entry_status & RF_BUSY)
1184                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1185         else
1186                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1187 #endif
1188
1189         /* Validate handle. */
1190         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1191                 sp = ha->outstanding_cmds[pkt->handle];
1192         else
1193                 sp = NULL;
1194
1195         if (sp) {
1196                 /* Free outstanding command slot. */
1197                 ha->outstanding_cmds[pkt->handle] = NULL;
1198
1199                 /* Bad payload or header */
1200                 if (pkt->entry_status &
1201                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1202                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1203                         sp->cmd->result = DID_ERROR << 16;
1204                 } else if (pkt->entry_status & RF_BUSY) {
1205                         sp->cmd->result = DID_BUS_BUSY << 16;
1206                 } else {
1207                         sp->cmd->result = DID_ERROR << 16;
1208                 }
1209                 qla2x00_sp_compl(ha, sp);
1210
1211         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1212             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1213                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1214                     ha->host_no));
1215                 qla_printk(KERN_WARNING, ha,
1216                     "Error entry - invalid handle\n");
1217
1218                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1219                 qla2xxx_wake_dpc(ha);
1220         }
1221 }
1222
1223 /**
1224  * qla2x00_ms_entry() - Process a Management Server entry.
1225  * @ha: SCSI driver HA context
1226  * @index: Response queue out pointer
1227  */
1228 static void
1229 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1230 {
1231         srb_t          *sp;
1232
1233         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1234             __func__, ha->host_no, pkt, pkt->handle1));
1235
1236         /* Validate handle. */
1237         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1238                 sp = ha->outstanding_cmds[pkt->handle1];
1239         else
1240                 sp = NULL;
1241
1242         if (sp == NULL) {
1243                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1244                     ha->host_no));
1245                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1246
1247                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1248                 return;
1249         }
1250
1251         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1252         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1253
1254         /* Free outstanding command slot. */
1255         ha->outstanding_cmds[pkt->handle1] = NULL;
1256
1257         qla2x00_sp_compl(ha, sp);
1258 }
1259
1260
1261 /**
1262  * qla24xx_mbx_completion() - Process mailbox command completions.
1263  * @ha: SCSI driver HA context
1264  * @mb0: Mailbox0 register
1265  */
1266 static void
1267 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1268 {
1269         uint16_t        cnt;
1270         uint16_t __iomem *wptr;
1271         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1272
1273         /* Load return mailbox registers. */
1274         ha->flags.mbox_int = 1;
1275         ha->mailbox_out[0] = mb0;
1276         wptr = (uint16_t __iomem *)&reg->mailbox1;
1277
1278         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1279                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1280                 wptr++;
1281         }
1282
1283         if (ha->mcp) {
1284                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1285                     __func__, ha->host_no, ha->mcp->mb[0]));
1286         } else {
1287                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1288                     __func__, ha->host_no));
1289         }
1290 }
1291
1292 /**
1293  * qla24xx_process_response_queue() - Process response queue entries.
1294  * @ha: SCSI driver HA context
1295  */
1296 void
1297 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1298 {
1299         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1300         struct sts_entry_24xx *pkt;
1301
1302         if (!ha->flags.online)
1303                 return;
1304
1305         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1306                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1307
1308                 ha->rsp_ring_index++;
1309                 if (ha->rsp_ring_index == ha->response_q_length) {
1310                         ha->rsp_ring_index = 0;
1311                         ha->response_ring_ptr = ha->response_ring;
1312                 } else {
1313                         ha->response_ring_ptr++;
1314                 }
1315
1316                 if (pkt->entry_status != 0) {
1317                         DEBUG3(printk(KERN_INFO
1318                             "scsi(%ld): Process error entry.\n", ha->host_no));
1319
1320                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1321                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1322                         wmb();
1323                         continue;
1324                 }
1325
1326                 switch (pkt->entry_type) {
1327                 case STATUS_TYPE:
1328                         qla2x00_status_entry(ha, pkt);
1329                         break;
1330                 case STATUS_CONT_TYPE:
1331                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1332                         break;
1333                 case MS_IOCB_TYPE:
1334                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1335                         break;
1336                 default:
1337                         /* Type Not Supported. */
1338                         DEBUG4(printk(KERN_WARNING
1339                             "scsi(%ld): Received unknown response pkt type %x "
1340                             "entry status=%x.\n",
1341                             ha->host_no, pkt->entry_type, pkt->entry_status));
1342                         break;
1343                 }
1344                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1345                 wmb();
1346         }
1347
1348         /* Adjust ring index */
1349         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1350 }
1351
1352 /**
1353  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1354  * @irq:
1355  * @dev_id: SCSI driver HA context
1356  * @regs:
1357  *
1358  * Called by system whenever the host adapter generates an interrupt.
1359  *
1360  * Returns handled flag.
1361  */
1362 irqreturn_t
1363 qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
1364 {
1365         scsi_qla_host_t *ha;
1366         struct device_reg_24xx __iomem *reg;
1367         int             status;
1368         unsigned long   flags;
1369         unsigned long   iter;
1370         uint32_t        stat;
1371         uint32_t        hccr;
1372         uint16_t        mb[4];
1373
1374         ha = (scsi_qla_host_t *) dev_id;
1375         if (!ha) {
1376                 printk(KERN_INFO
1377                     "%s(): NULL host pointer\n", __func__);
1378                 return IRQ_NONE;
1379         }
1380
1381         reg = &ha->iobase->isp24;
1382         status = 0;
1383
1384         spin_lock_irqsave(&ha->hardware_lock, flags);
1385         for (iter = 50; iter--; ) {
1386                 stat = RD_REG_DWORD(&reg->host_status);
1387                 if (stat & HSRX_RISC_PAUSED) {
1388                         hccr = RD_REG_DWORD(&reg->hccr);
1389
1390                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1391                             "Dumping firmware!\n", hccr);
1392                         qla24xx_fw_dump(ha, 1);
1393
1394                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1395                         break;
1396                 } else if ((stat & HSRX_RISC_INT) == 0)
1397                         break;
1398
1399                 switch (stat & 0xff) {
1400                 case 0x1:
1401                 case 0x2:
1402                 case 0x10:
1403                 case 0x11:
1404                         qla24xx_mbx_completion(ha, MSW(stat));
1405                         status |= MBX_INTERRUPT;
1406
1407                         break;
1408                 case 0x12:
1409                         mb[0] = MSW(stat);
1410                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1411                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1412                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1413                         qla2x00_async_event(ha, mb);
1414                         break;
1415                 case 0x13:
1416                         qla24xx_process_response_queue(ha);
1417                         break;
1418                 default:
1419                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1420                             "(%d).\n",
1421                             ha->host_no, stat & 0xff));
1422                         break;
1423                 }
1424                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1425                 RD_REG_DWORD_RELAXED(&reg->hccr);
1426         }
1427         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1428
1429         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1430             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1431                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1432
1433                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1434                 up(&ha->mbx_intr_sem);
1435
1436                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1437         }
1438
1439         return IRQ_HANDLED;
1440 }
1441
1442 /**
1443  * qla24xx_ms_entry() - Process a Management Server entry.
1444  * @ha: SCSI driver HA context
1445  * @index: Response queue out pointer
1446  */
1447 static void
1448 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1449 {
1450         srb_t          *sp;
1451
1452         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1453             __func__, ha->host_no, pkt, pkt->handle));
1454
1455         DEBUG9(printk("%s: ct pkt dump:\n", __func__);)
1456         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx));)
1457
1458         /* Validate handle. */
1459         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1460                 sp = ha->outstanding_cmds[pkt->handle];
1461         else
1462                 sp = NULL;
1463
1464         if (sp == NULL) {
1465                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1466                     ha->host_no));
1467                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1468                     ha->host_no));
1469                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1470                     pkt->handle);
1471
1472                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1473                 return;
1474         }
1475
1476         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1477         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1478
1479         /* Free outstanding command slot. */
1480         ha->outstanding_cmds[pkt->handle] = NULL;
1481
1482         qla2x00_sp_compl(ha, sp);
1483 }
1484