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