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_QLA25XX(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);
 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                 ha->link_data_rate = 0;
 406                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 407                         link_speed = link_speeds[0];
 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);
 436                 }
 437
 438                 ha->flags.management_server_logged_in = 0;
 439                 ha->link_data_rate = 0;
 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);
 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);
 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);
 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 a single remote port just logged into (or logged out of)
 519                  * us, create a new entry in our rscn fcports list and handle
 520                  * the event like an RSCN.
 521                  */
 522                 if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
 523                     !IS_QLA6322(ha) && !IS_QLA24XX(ha) && !IS_QLA25XX(ha) &&
 524                     ha->flags.init_done && mb[1] != 0xffff &&
 525                     ((ha->operating_mode == P2P && mb[1] != 0) ||
 526                     (ha->operating_mode != P2P && mb[1] !=
 527                         SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
 528                         int rval;
 529                         fc_port_t *rscn_fcport;
 530
 531                         /* Create new fcport for login. */
 532                         rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
 533                         if (rscn_fcport) {
 534                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 535                                     "creating RSCN fcport %p for %x/%x/%x.\n",
 536                                     ha->host_no, rscn_fcport, mb[1], mb[2],
 537                                     mb[3]));
 538
 539                                 rscn_fcport->loop_id = mb[1];
 540                                 rscn_fcport->d_id.b24 = INVALID_PORT_ID;
 541                                 atomic_set(&rscn_fcport->state,
 542                                     FCS_DEVICE_LOST);
 543                                 list_add_tail(&rscn_fcport->list,
 544                                     &ha->rscn_fcports);
 545
 546                                 rval = qla2x00_handle_port_rscn(ha, 0,
 547                                     rscn_fcport, 1);
 548                                 if (rval == QLA_SUCCESS)
 549                                         break;
 550                         } else {
 551                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 552                                     "-- unable to allocate RSCN fcport "
 553                                     "login.\n", ha->host_no));
 554                         }
 555                 }
 556
 557                 /*
 558                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 559                  * event etc. earlier indicating loop is down) then process
 560                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 561                  */
 562                 atomic_set(&ha->loop_down_timer, 0);
 563                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 564                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 565                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 566                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 567                             mb[2], mb[3]));
 568                         break;
 569                 }
 570
 571                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 572                     ha->host_no));
 573                 DEBUG(printk(KERN_INFO
 574                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 575                     ha->host_no, mb[1], mb[2], mb[3]));
 576
 577                 /*
 578                  * Mark all devices as missing so we will login again.
 579                  */
 580                 atomic_set(&ha->loop_state, LOOP_UP);
 581
 582                 qla2x00_mark_all_devices_lost(ha);
 583
 584                 ha->flags.rscn_queue_overflow = 1;
 585
 586                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 587                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 588
 589                 /* Update AEN queue. */
 590                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
 591                 break;
 592
 593         case MBA_RSCN_UPDATE:           /* State Change Registration */
 594                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 595                     ha->host_no));
 596                 DEBUG(printk(KERN_INFO
 597                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 598                     ha->host_no, mb[1], mb[2]));
 599
 600                 rscn_entry = (mb[1] << 16) | mb[2];
 601                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 602                     ha->d_id.b.al_pa;
 603                 if (rscn_entry == host_pid) {
 604                         DEBUG(printk(KERN_INFO
 605                             "scsi(%ld): Ignoring RSCN update to local host "
 606                             "port ID (%06x)\n",
 607                             ha->host_no, host_pid));
 608                         break;
 609                 }
 610
 611                 rscn_queue_index = ha->rscn_in_ptr + 1;
 612                 if (rscn_queue_index == MAX_RSCN_COUNT)
 613                         rscn_queue_index = 0;
 614                 if (rscn_queue_index != ha->rscn_out_ptr) {
 615                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 616                         ha->rscn_in_ptr = rscn_queue_index;
 617                 } else {
 618                         ha->flags.rscn_queue_overflow = 1;
 619                 }
 620
 621                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 622                 atomic_set(&ha->loop_down_timer, 0);
 623                 ha->flags.management_server_logged_in = 0;
 624
 625                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 626                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 627
 628                 /* Update AEN queue. */
 629                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
 630                 break;
 631
 632         /* case MBA_RIO_RESPONSE: */
 633         case MBA_ZIO_RESPONSE:
 634                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 635                     ha->host_no));
 636                 DEBUG(printk(KERN_INFO
 637                     "scsi(%ld): [R|Z]IO update completion.\n",
 638                     ha->host_no));
 639
 640                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
 641                         qla24xx_process_response_queue(ha);
 642                 else
 643                         qla2x00_process_response_queue(ha);
 644                 break;
 645
 646         case MBA_DISCARD_RND_FRAME:
 647                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 648                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 649                 break;
 650         }
 651 }
 652
 653 /**
 654  * qla2x00_process_completed_request() - Process a Fast Post response.
 655  * @ha: SCSI driver HA context
 656  * @index: SRB index
 657  */
 658 static void
 659 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 660 {
 661         srb_t *sp;
 662
 663         /* Validate handle. */
 664         if (index >= MAX_OUTSTANDING_COMMANDS) {
 665                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 666                     ha->host_no, index));
 667                 qla_printk(KERN_WARNING, ha,
 668                     "Invalid SCSI completion handle %d.\n", index);
 669
 670                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 671                 return;
 672         }
 673
 674         sp = ha->outstanding_cmds[index];
 675         if (sp) {
 676                 /* Free outstanding command slot. */
 677                 ha->outstanding_cmds[index] = NULL;
 678
 679                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 680                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 681
 682                 /* Save ISP completion status */
 683                 sp->cmd->result = DID_OK << 16;
 684                 qla2x00_sp_compl(ha, sp);
 685         } else {
 686                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 687                     ha->host_no));
 688                 qla_printk(KERN_WARNING, ha,
 689                     "Invalid ISP SCSI completion handle\n");
 690
 691                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 692         }
 693 }
 694
 695 /**
 696  * qla2x00_process_response_queue() - Process response queue entries.
 697  * @ha: SCSI driver HA context
 698  */
 699 void
 700 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 701 {
 702         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 703         sts_entry_t     *pkt;
 704         uint16_t        handle_cnt;
 705         uint16_t        cnt;
 706
 707         if (!ha->flags.online)
 708                 return;
 709
 710         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 711                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 712
 713                 ha->rsp_ring_index++;
 714                 if (ha->rsp_ring_index == ha->response_q_length) {
 715                         ha->rsp_ring_index = 0;
 716                         ha->response_ring_ptr = ha->response_ring;
 717                 } else {
 718                         ha->response_ring_ptr++;
 719                 }
 720
 721                 if (pkt->entry_status != 0) {
 722                         DEBUG3(printk(KERN_INFO
 723                             "scsi(%ld): Process error entry.\n", ha->host_no));
 724
 725                         qla2x00_error_entry(ha, pkt);
 726                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 727                         wmb();
 728                         continue;
 729                 }
 730
 731                 switch (pkt->entry_type) {
 732                 case STATUS_TYPE:
 733                         qla2x00_status_entry(ha, pkt);
 734                         break;
 735                 case STATUS_TYPE_21:
 736                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 737                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 738                                 qla2x00_process_completed_request(ha,
 739                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 740                         }
 741                         break;
 742                 case STATUS_TYPE_22:
 743                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 744                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 745                                 qla2x00_process_completed_request(ha,
 746                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 747                         }
 748                         break;
 749                 case STATUS_CONT_TYPE:
 750                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 751                         break;
 752                 case MS_IOCB_TYPE:
 753                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 754                         break;
 755                 case MBX_IOCB_TYPE:
 756                         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
 757                             !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
 758                                 if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
 759                                         qla2x00_process_iodesc(ha,
 760                                             (struct mbx_entry *)pkt);
 761                                 } else {
 762                                         /* MBX IOCB Type Not Supported. */
 763                                         DEBUG4(printk(KERN_WARNING
 764                                             "scsi(%ld): Received unknown MBX "
 765                                             "IOCB response pkt type=%x "
 766                                             "source=%x entry status=%x.\n",
 767                                             ha->host_no, pkt->entry_type,
 768                                             pkt->sys_define,
 769                                             pkt->entry_status));
 770                                 }
 771                                 break;
 772                         }
 773                         /* Fallthrough. */
 774                 default:
 775                         /* Type Not Supported. */
 776                         DEBUG4(printk(KERN_WARNING
 777                             "scsi(%ld): Received unknown response pkt type %x "
 778                             "entry status=%x.\n",
 779                             ha->host_no, pkt->entry_type, pkt->entry_status));
 780                         break;
 781                 }
 782                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 783                 wmb();
 784         }
 785
 786         /* Adjust ring index */
 787         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 788 }
 789
 790 /**
 791  * qla2x00_status_entry() - Process a Status IOCB entry.
 792  * @ha: SCSI driver HA context
 793  * @pkt: Entry pointer
 794  */
 795 static void
 796 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 797 {
 798         srb_t           *sp;
 799         fc_port_t       *fcport;
 800         struct scsi_cmnd *cp;
 801         sts_entry_t *sts;
 802         struct sts_entry_24xx *sts24;
 803         uint16_t        comp_status;
 804         uint16_t        scsi_status;
 805         uint8_t         lscsi_status;
 806         int32_t         resid;
 807         uint32_t        sense_len, rsp_info_len, resid_len;
 808         uint8_t         *rsp_info, *sense_data;
 809
 810         sts = (sts_entry_t *) pkt;
 811         sts24 = (struct sts_entry_24xx *) pkt;
 812         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
 813                 comp_status = le16_to_cpu(sts24->comp_status);
 814                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 815         } else {
 816                 comp_status = le16_to_cpu(sts->comp_status);
 817                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 818         }
 819
 820         /* Fast path completion. */
 821         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 822                 qla2x00_process_completed_request(ha, sts->handle);
 823
 824                 return;
 825         }
 826
 827         /* Validate handle. */
 828         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 829                 sp = ha->outstanding_cmds[sts->handle];
 830                 ha->outstanding_cmds[sts->handle] = NULL;
 831         } else
 832                 sp = NULL;
 833
 834         if (sp == NULL) {
 835                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 836                     ha->host_no));
 837                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 838
 839                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 840                 if (ha->dpc_wait && !ha->dpc_active)
 841                         up(ha->dpc_wait);
 842
 843                 return;
 844         }
 845         cp = sp->cmd;
 846         if (cp == NULL) {
 847                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 848                     "pkt->handle=%d sp=%p sp->state:%d\n",
 849                     ha->host_no, sts->handle, sp, sp->state));
 850                 qla_printk(KERN_WARNING, ha,
 851                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 852
 853                 return;
 854         }
 855
 856         lscsi_status = scsi_status & STATUS_MASK;
 857         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 858         CMD_COMPL_STATUS(cp) = comp_status;
 859         CMD_SCSI_STATUS(cp) = scsi_status;
 860
 861         fcport = sp->fcport;
 862
 863         sense_len = rsp_info_len = resid_len = 0;
 864         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
 865                 sense_len = le32_to_cpu(sts24->sense_len);
 866                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 867                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 868                 rsp_info = sts24->data;
 869                 sense_data = sts24->data;
 870                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 871         } else {
 872                 sense_len = le16_to_cpu(sts->req_sense_length);
 873                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 874                 resid_len = le32_to_cpu(sts->residual_length);
 875                 rsp_info = sts->rsp_info;
 876                 sense_data = sts->req_sense_data;
 877         }
 878
 879         /* Check for any FCP transport errors. */
 880         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 881                 /* Sense data lies beyond any FCP RESPONSE data. */
 882                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
 883                         sense_data += rsp_info_len;
 884                 if (rsp_info_len > 3 && rsp_info[3]) {
 885                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 886                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 887                             "retrying command\n", ha->host_no,
 888                             cp->device->channel, cp->device->id,
 889                             cp->device->lun, rsp_info_len, rsp_info[0],
 890                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 891                             rsp_info[5], rsp_info[6], rsp_info[7]));
 892
 893                         cp->result = DID_BUS_BUSY << 16;
 894                         qla2x00_sp_compl(ha, sp);
 895                         return;
 896                 }
 897         }
 898
 899         /*
 900          * Based on Host and scsi status generate status code for Linux
 901          */
 902         switch (comp_status) {
 903         case CS_COMPLETE:
 904                 if (scsi_status == 0) {
 905                         cp->result = DID_OK << 16;
 906                         break;
 907                 }
 908                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 909                         resid = resid_len;
 910                         cp->resid = resid;
 911                         CMD_RESID_LEN(cp) = resid;
 912
 913                         if (!lscsi_status &&
 914                             ((unsigned)(cp->request_bufflen - resid) <
 915                              cp->underflow)) {
 916                                 qla_printk(KERN_INFO, ha,
 917                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 918                                     "detected (%x of %x bytes)...returning "
 919                                     "error status.\n", ha->host_no,
 920                                     cp->device->channel, cp->device->id,
 921                                     cp->device->lun, resid,
 922                                     cp->request_bufflen);
 923
 924                                 cp->result = DID_ERROR << 16;
 925                                 break;
 926                         }
 927                 }
 928                 cp->result = DID_OK << 16 | lscsi_status;
 929
 930                 if (lscsi_status != SS_CHECK_CONDITION)
 931                         break;
 932
 933                 /* Copy Sense Data into sense buffer. */
 934                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 935
 936                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 937                         break;
 938
 939                 if (sense_len >= sizeof(cp->sense_buffer))
 940                         sense_len = sizeof(cp->sense_buffer);
 941
 942                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 943                 sp->request_sense_length = sense_len;
 944                 sp->request_sense_ptr = cp->sense_buffer;
 945
 946                 if (sp->request_sense_length > 32)
 947                         sense_len = 32;
 948
 949                 memcpy(cp->sense_buffer, sense_data, sense_len);
 950
 951                 sp->request_sense_ptr += sense_len;
 952                 sp->request_sense_length -= sense_len;
 953                 if (sp->request_sense_length != 0)
 954                         ha->status_srb = sp;
 955
 956                 DEBUG5(printk("%s(): Check condition Sense data, "
 957                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 958                     ha->host_no, cp->device->channel, cp->device->id,
 959                     cp->device->lun, cp, cp->serial_number));
 960                 if (sense_len)
 961                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 962                             CMD_ACTUAL_SNSLEN(cp)));
 963                 break;
 964
 965         case CS_DATA_UNDERRUN:
 966                 resid = resid_len;
 967                 if (scsi_status & SS_RESIDUAL_UNDER) {
 968                         cp->resid = resid;
 969                         CMD_RESID_LEN(cp) = resid;
 970                 } else {
 971                         DEBUG2(printk(KERN_INFO
 972                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 973                             "0x%x-0x%x.\n", ha->host_no, cp->device->id,
 974                             cp->device->lun, comp_status, scsi_status));
 975
 976                 }
 977
 978                 /*
 979                  * Check to see if SCSI Status is non zero. If so report SCSI
 980                  * Status.
 981                  */
 982                 if (lscsi_status != 0) {
 983                         cp->result = DID_OK << 16 | lscsi_status;
 984
 985                         if (lscsi_status != SS_CHECK_CONDITION)
 986                                 break;
 987
 988                         /* Copy Sense Data into sense buffer */
 989                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 990
 991                         if (!(scsi_status & SS_SENSE_LEN_VALID))
 992                                 break;
 993
 994                         if (sense_len >= sizeof(cp->sense_buffer))
 995                                 sense_len = sizeof(cp->sense_buffer);
 996
 997                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 998                         sp->request_sense_length = sense_len;
 999                         sp->request_sense_ptr = cp->sense_buffer;
1000
1001                         if (sp->request_sense_length > 32)
1002                                 sense_len = 32;
1003
1004                         memcpy(cp->sense_buffer, sense_data, sense_len);
1005
1006                         sp->request_sense_ptr += sense_len;
1007                         sp->request_sense_length -= sense_len;
1008                         if (sp->request_sense_length != 0)
1009                                 ha->status_srb = sp;
1010
1011                         DEBUG5(printk("%s(): Check condition Sense data, "
1012                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1013                             __func__, ha->host_no, cp->device->channel,
1014                             cp->device->id, cp->device->lun, cp,
1015                             cp->serial_number));
1016
1017                         if (sense_len)
1018                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1019                                     CMD_ACTUAL_SNSLEN(cp)));
1020                 } else {
1021                         /*
1022                          * If RISC reports underrun and target does not report
1023                          * it then we must have a lost frame, so tell upper
1024                          * layer to retry it by reporting a bus busy.
1025                          */
1026                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1027                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1028                                     "frame(s) detected (%x of %x bytes)..."
1029                                     "retrying command.\n", ha->host_no,
1030                                     cp->device->channel, cp->device->id,
1031                                     cp->device->lun, resid,
1032                                     cp->request_bufflen));
1033
1034                                 cp->result = DID_BUS_BUSY << 16;
1035                                 break;
1036                         }
1037
1038                         /* Handle mid-layer underflow */
1039                         if ((unsigned)(cp->request_bufflen - resid) <
1040                             cp->underflow) {
1041                                 qla_printk(KERN_INFO, ha,
1042                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1043                                     "detected (%x of %x bytes)...returning "
1044                                     "error status.\n", ha->host_no,
1045                                     cp->device->channel, cp->device->id,
1046                                     cp->device->lun, resid,
1047                                     cp->request_bufflen);
1048
1049                                 cp->result = DID_ERROR << 16;
1050                                 break;
1051                         }
1052
1053                         /* Everybody online, looking good... */
1054                         cp->result = DID_OK << 16;
1055                 }
1056                 break;
1057
1058         case CS_DATA_OVERRUN:
1059                 DEBUG2(printk(KERN_INFO
1060                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1061                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1062                     scsi_status));
1063                 DEBUG2(printk(KERN_INFO
1064                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1065                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1066                     cp->cmnd[4], cp->cmnd[5]));
1067                 DEBUG2(printk(KERN_INFO
1068                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1069                     "status!\n",
1070                     cp->serial_number, cp->request_bufflen, resid_len));
1071
1072                 cp->result = DID_ERROR << 16;
1073                 break;
1074
1075         case CS_PORT_LOGGED_OUT:
1076         case CS_PORT_CONFIG_CHG:
1077         case CS_PORT_BUSY:
1078         case CS_INCOMPLETE:
1079         case CS_PORT_UNAVAILABLE:
1080                 /*
1081                  * If the port is in Target Down state, return all IOs for this
1082                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1083                  * retry_queue.
1084                  */
1085                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1086                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1087                     ha->host_no, cp->device->id, cp->device->lun,
1088                     cp->serial_number, comp_status,
1089                     atomic_read(&fcport->state)));
1090
1091                 cp->result = DID_BUS_BUSY << 16;
1092                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1093                         qla2x00_mark_device_lost(ha, fcport, 1);
1094                 }
1095                 break;
1096
1097         case CS_RESET:
1098                 DEBUG2(printk(KERN_INFO
1099                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1100                     ha->host_no, comp_status, scsi_status));
1101
1102                 cp->result = DID_RESET << 16;
1103                 break;
1104
1105         case CS_ABORTED:
1106                 /*
1107                  * hv2.19.12 - DID_ABORT does not retry the request if we
1108                  * aborted this request then abort otherwise it must be a
1109                  * reset.
1110                  */
1111                 DEBUG2(printk(KERN_INFO
1112                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1113                     ha->host_no, comp_status, scsi_status));
1114
1115                 cp->result = DID_RESET << 16;
1116                 break;
1117
1118         case CS_TIMEOUT:
1119                 cp->result = DID_BUS_BUSY << 16;
1120
1121                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
1122                         DEBUG2(printk(KERN_INFO
1123                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1124                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1125                             cp->device->id, cp->device->lun, comp_status,
1126                             scsi_status));
1127                         break;
1128                 }
1129                 DEBUG2(printk(KERN_INFO
1130                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1131                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1132                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1133                     le16_to_cpu(sts->status_flags)));
1134
1135                 /* Check to see if logout occurred. */
1136                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1137                         qla2x00_mark_device_lost(ha, fcport, 1);
1138                 break;
1139
1140         case CS_QUEUE_FULL:
1141                 DEBUG2(printk(KERN_INFO
1142                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1143                     ha->host_no, comp_status, scsi_status));
1144
1145                 /* SCSI Mid-Layer handles device queue full */
1146
1147                 cp->result = DID_OK << 16 | lscsi_status;
1148
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 sp->state:%d\n", __func__, sp, sp->state));
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_QLA25XX(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                 if (ha->dpc_wait && !ha->dpc_active)
1274                         up(ha->dpc_wait);
1275         }
1276 }
1277
1278 /**
1279  * qla2x00_ms_entry() - Process a Management Server entry.
1280  * @ha: SCSI driver HA context
1281  * @index: Response queue out pointer
1282  */
1283 static void
1284 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1285 {
1286         srb_t          *sp;
1287
1288         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1289             __func__, ha->host_no, pkt, pkt->handle1));
1290
1291         /* Validate handle. */
1292         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1293                 sp = ha->outstanding_cmds[pkt->handle1];
1294         else
1295                 sp = NULL;
1296
1297         if (sp == NULL) {
1298                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1299                     ha->host_no));
1300                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1301
1302                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1303                 return;
1304         }
1305
1306         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1307         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1308
1309         /* Free outstanding command slot. */
1310         ha->outstanding_cmds[pkt->handle1] = NULL;
1311
1312         qla2x00_sp_compl(ha, sp);
1313 }
1314
1315
1316 /**
1317  * qla24xx_mbx_completion() - Process mailbox command completions.
1318  * @ha: SCSI driver HA context
1319  * @mb0: Mailbox0 register
1320  */
1321 static void
1322 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1323 {
1324         uint16_t        cnt;
1325         uint16_t __iomem *wptr;
1326         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1327
1328         /* Load return mailbox registers. */
1329         ha->flags.mbox_int = 1;
1330         ha->mailbox_out[0] = mb0;
1331         wptr = (uint16_t __iomem *)&reg->mailbox1;
1332
1333         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1334                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1335                 wptr++;
1336         }
1337
1338         if (ha->mcp) {
1339                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1340                     __func__, ha->host_no, ha->mcp->mb[0]));
1341         } else {
1342                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1343                     __func__, ha->host_no));
1344         }
1345 }
1346
1347 /**
1348  * qla24xx_process_response_queue() - Process response queue entries.
1349  * @ha: SCSI driver HA context
1350  */
1351 void
1352 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1353 {
1354         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1355         struct sts_entry_24xx *pkt;
1356
1357         if (!ha->flags.online)
1358                 return;
1359
1360         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1361                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1362
1363                 ha->rsp_ring_index++;
1364                 if (ha->rsp_ring_index == ha->response_q_length) {
1365                         ha->rsp_ring_index = 0;
1366                         ha->response_ring_ptr = ha->response_ring;
1367                 } else {
1368                         ha->response_ring_ptr++;
1369                 }
1370
1371                 if (pkt->entry_status != 0) {
1372                         DEBUG3(printk(KERN_INFO
1373                             "scsi(%ld): Process error entry.\n", ha->host_no));
1374
1375                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1376                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1377                         wmb();
1378                         continue;
1379                 }
1380
1381                 switch (pkt->entry_type) {
1382                 case STATUS_TYPE:
1383                         qla2x00_status_entry(ha, pkt);
1384                         break;
1385                 case STATUS_CONT_TYPE:
1386                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1387                         break;
1388                 case MS_IOCB_TYPE:
1389                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1390                         break;
1391                 default:
1392                         /* Type Not Supported. */
1393                         DEBUG4(printk(KERN_WARNING
1394                             "scsi(%ld): Received unknown response pkt type %x "
1395                             "entry status=%x.\n",
1396                             ha->host_no, pkt->entry_type, pkt->entry_status));
1397                         break;
1398                 }
1399                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1400                 wmb();
1401         }
1402
1403         /* Adjust ring index */
1404         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1405 }
1406
1407 /**
1408  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1409  * @irq:
1410  * @dev_id: SCSI driver HA context
1411  * @regs:
1412  *
1413  * Called by system whenever the host adapter generates an interrupt.
1414  *
1415  * Returns handled flag.
1416  */
1417 irqreturn_t
1418 qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
1419 {
1420         scsi_qla_host_t *ha;
1421         struct device_reg_24xx __iomem *reg;
1422         int             status;
1423         unsigned long   flags;
1424         unsigned long   iter;
1425         uint32_t        stat;
1426         uint32_t        hccr;
1427         uint16_t        mb[4];
1428
1429         ha = (scsi_qla_host_t *) dev_id;
1430         if (!ha) {
1431                 printk(KERN_INFO
1432                     "%s(): NULL host pointer\n", __func__);
1433                 return IRQ_NONE;
1434         }
1435
1436         reg = &ha->iobase->isp24;
1437         status = 0;
1438
1439         spin_lock_irqsave(&ha->hardware_lock, flags);
1440         for (iter = 50; iter--; ) {
1441                 stat = RD_REG_DWORD(&reg->host_status);
1442                 if (stat & HSRX_RISC_PAUSED) {
1443                         hccr = RD_REG_DWORD(&reg->hccr);
1444
1445                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1446                             "Dumping firmware!\n", hccr);
1447                         qla24xx_fw_dump(ha, 1);
1448
1449                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1450                         break;
1451                 } else if ((stat & HSRX_RISC_INT) == 0)
1452                         break;
1453
1454                 switch (stat & 0xff) {
1455                 case 0x1:
1456                 case 0x2:
1457                 case 0x10:
1458                 case 0x11:
1459                         qla24xx_mbx_completion(ha, MSW(stat));
1460                         status |= MBX_INTERRUPT;
1461
1462                         break;
1463                 case 0x12:
1464                         mb[0] = MSW(stat);
1465                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1466                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1467                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1468                         qla2x00_async_event(ha, mb);
1469                         break;
1470                 case 0x13:
1471                         qla24xx_process_response_queue(ha);
1472                         break;
1473                 default:
1474                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1475                             "(%d).\n",
1476                             ha->host_no, stat & 0xff));
1477                         break;
1478                 }
1479                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1480                 RD_REG_DWORD_RELAXED(&reg->hccr);
1481         }
1482         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1483
1484         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1485             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1486                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1487
1488                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1489                 up(&ha->mbx_intr_sem);
1490
1491                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1492         }
1493
1494         return IRQ_HANDLED;
1495 }
1496
1497 /**
1498  * qla24xx_ms_entry() - Process a Management Server entry.
1499  * @ha: SCSI driver HA context
1500  * @index: Response queue out pointer
1501  */
1502 static void
1503 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1504 {
1505         srb_t          *sp;
1506
1507         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1508             __func__, ha->host_no, pkt, pkt->handle));
1509
1510         DEBUG9(printk("%s: ct pkt dump:\n", __func__);)
1511         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx));)
1512
1513         /* Validate handle. */
1514         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1515                 sp = ha->outstanding_cmds[pkt->handle];
1516         else
1517                 sp = NULL;
1518
1519         if (sp == NULL) {
1520                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1521                     ha->host_no));
1522                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1523                     ha->host_no));
1524                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1525                     pkt->handle);
1526
1527                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1528                 return;
1529         }
1530
1531         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1532         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1533
1534         /* Free outstanding command slot. */
1535         ha->outstanding_cmds[pkt->handle] = NULL;
1536
1537         qla2x00_sp_compl(ha, sp);
1538 }
1539