drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  *                  QLOGIC LINUX SOFTWARE
   3  *
   4  * QLogic ISP2x00 device driver for Linux 2.6.x
   5  * Copyright (C) 2003-2004 QLogic Corporation
   6  * (www.qlogic.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19 #include "qla_def.h"
  20
  21 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  22 static void qla2x00_async_event(scsi_qla_host_t *, uint32_t);
  23 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  24 void qla2x00_process_response_queue(struct scsi_qla_host *);
  25 static void qla2x00_status_entry(scsi_qla_host_t *, sts_entry_t *);
  26 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  27 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  28 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  29
  30 static int qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *);
  31
  32 /**
  33  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  34  * @irq:
  35  * @dev_id: SCSI driver HA context
  36  * @regs:
  37  *
  38  * Called by system whenever the host adapter generates an interrupt.
  39  *
  40  * Returns handled flag.
  41  */
  42 irqreturn_t
  43 qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
  44 {
  45         scsi_qla_host_t *ha;
  46         device_reg_t __iomem *reg;
  47         int             status;
  48         unsigned long   flags;
  49         unsigned long   iter;
  50         uint32_t        mbx;
  51
  52         ha = (scsi_qla_host_t *) dev_id;
  53         if (!ha) {
  54                 printk(KERN_INFO
  55                     "%s(): NULL host pointer\n", __func__);
  56                 return (IRQ_NONE);
  57         }
  58
  59         reg = ha->iobase;
  60         status = 0;
  61
  62         spin_lock_irqsave(&ha->hardware_lock, flags);
  63         for (iter = 50; iter--; ) {
  64                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  65                         break;
  66
  67                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  68                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  69                         RD_REG_WORD(&reg->hccr);
  70
  71                         /* Get mailbox data. */
  72                         mbx = RD_MAILBOX_REG(ha, reg, 0);
  73                         if (mbx > 0x3fff && mbx < 0x8000) {
  74                                 qla2x00_mbx_completion(ha, (uint16_t)mbx);
  75                                 status |= MBX_INTERRUPT;
  76                         } else if (mbx > 0x7fff && mbx < 0xc000) {
  77                                 qla2x00_async_event(ha, mbx);
  78                         } else {
  79                                 /*EMPTY*/
  80                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  81                                     "interrupt type (%d)\n",
  82                                     ha->host_no, mbx));
  83                         }
  84                         /* Release mailbox registers. */
  85                         WRT_REG_WORD(&reg->semaphore, 0);
  86                         RD_REG_WORD(&reg->semaphore);
  87                 } else {
  88                         qla2x00_process_response_queue(ha);
  89
  90                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  91                         RD_REG_WORD(&reg->hccr);
  92                 }
  93         }
  94         spin_unlock_irqrestore(&ha->hardware_lock, flags);
  95
  96         qla2x00_next(ha);
  97         ha->last_irq_cpu = _smp_processor_id();
  98         ha->total_isr_cnt++;
  99
 100         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 101             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 102                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
 103
 104                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 105                 up(&ha->mbx_intr_sem);
 106
 107                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
 108         }
 109
 110         if (!list_empty(&ha->done_queue))
 111                 qla2x00_done(ha);
 112
 113         return (IRQ_HANDLED);
 114 }
 115
 116 /**
 117  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 118  * @irq:
 119  * @dev_id: SCSI driver HA context
 120  * @regs:
 121  *
 122  * Called by system whenever the host adapter generates an interrupt.
 123  *
 124  * Returns handled flag.
 125  */
 126 irqreturn_t
 127 qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 128 {
 129         scsi_qla_host_t *ha;
 130         device_reg_t __iomem *reg;
 131         int             status;
 132         unsigned long   flags;
 133         unsigned long   iter;
 134         uint32_t        stat;
 135         uint32_t        mbx;
 136         uint16_t        hccr;
 137
 138         ha = (scsi_qla_host_t *) dev_id;
 139         if (!ha) {
 140                 printk(KERN_INFO
 141                     "%s(): NULL host pointer\n", __func__);
 142                 return (IRQ_NONE);
 143         }
 144
 145         reg = ha->iobase;
 146         status = 0;
 147
 148         spin_lock_irqsave(&ha->hardware_lock, flags);
 149         for (iter = 50; iter--; ) {
 150                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 151                 if (stat & HSR_RISC_PAUSED) {
 152                         hccr = RD_REG_WORD(&reg->hccr);
 153                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 154                                 qla_printk(KERN_INFO, ha,
 155                                     "Parity error -- HCCR=%x.\n", hccr);
 156                         else
 157                                 qla_printk(KERN_INFO, ha,
 158                                     "RISC paused -- HCCR=%x\n", hccr);
 159
 160                         /*
 161                          * Issue a "HARD" reset in order for the RISC
 162                          * interrupt bit to be cleared.  Schedule a big
 163                          * hammmer to get out of the RISC PAUSED state.
 164                          */
 165                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 166                         RD_REG_WORD(&reg->hccr);
 167                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 168                         break;
 169                 } else if ((stat & HSR_RISC_INT) == 0)
 170                         break;
 171
 172                 mbx = MSW(stat);
 173                 switch (stat & 0xff) {
 174                 case 0x13:
 175                         qla2x00_process_response_queue(ha);
 176                         break;
 177                 case 0x1:
 178                 case 0x2:
 179                 case 0x10:
 180                 case 0x11:
 181                         qla2x00_mbx_completion(ha, (uint16_t)mbx);
 182                         status |= MBX_INTERRUPT;
 183
 184                         /* Release mailbox registers. */
 185                         WRT_REG_WORD(&reg->semaphore, 0);
 186                         break;
 187                 case 0x12:
 188                         qla2x00_async_event(ha, mbx);
 189                         break;
 190                 case 0x15:
 191                         mbx = mbx << 16 | MBA_CMPLT_1_16BIT;
 192                         qla2x00_async_event(ha, mbx);
 193                         break;
 194                 case 0x16:
 195                         mbx = mbx << 16 | MBA_SCSI_COMPLETION;
 196                         qla2x00_async_event(ha, mbx);
 197                         break;
 198                 default:
 199                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 200                             "(%d)\n",
 201                             ha->host_no, stat & 0xff));
 202                         break;
 203                 }
 204                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 205                 RD_REG_WORD_RELAXED(&reg->hccr);
 206         }
 207         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 208
 209         qla2x00_next(ha);
 210         ha->last_irq_cpu = _smp_processor_id();
 211         ha->total_isr_cnt++;
 212
 213         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 214             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 215                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
 216
 217                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 218                 up(&ha->mbx_intr_sem);
 219
 220                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
 221         }
 222
 223         if (!list_empty(&ha->done_queue))
 224                 qla2x00_done(ha);
 225
 226         return (IRQ_HANDLED);
 227 }
 228
 229 /**
 230  * qla2x00_mbx_completion() - Process mailbox command completions.
 231  * @ha: SCSI driver HA context
 232  * @mb0: Mailbox0 register
 233  */
 234 static void
 235 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 236 {
 237         uint16_t        cnt;
 238         uint16_t __iomem *wptr;
 239         device_reg_t __iomem *reg = ha->iobase;
 240
 241         /* Load return mailbox registers. */
 242         ha->flags.mbox_int = 1;
 243         ha->mailbox_out[0] = mb0;
 244         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 245
 246         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 247                 if (IS_QLA2200(ha) && cnt == 8)
 248                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 249                 if (cnt == 4 || cnt == 5)
 250                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 251                 else
 252                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 253
 254                 wptr++;
 255         }
 256
 257         if (ha->mcp) {
 258                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 259                     __func__, ha->host_no, ha->mcp->mb[0]));
 260         } else {
 261                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 262                     __func__, ha->host_no));
 263         }
 264 }
 265
 266 /**
 267  * qla2x00_async_event() - Process aynchronous events.
 268  * @ha: SCSI driver HA context
 269  * @mb0: Mailbox0 register
 270  */
 271 static void
 272 qla2x00_async_event(scsi_qla_host_t *ha, uint32_t mbx)
 273 {
 274         static char     *link_speeds[5] = { "1", "2", "4", "?", "10" };
 275         char            *link_speed;
 276         uint16_t        mb[4];
 277         uint16_t        handle_cnt;
 278         uint16_t        cnt;
 279         uint32_t        handles[5];
 280         device_reg_t __iomem *reg = ha->iobase;
 281         uint32_t        rscn_entry, host_pid;
 282         uint8_t         rscn_queue_index;
 283
 284         /* Setup to process RIO completion. */
 285         handle_cnt = 0;
 286         mb[0] = LSW(mbx);
 287         switch (mb[0]) {
 288         case MBA_SCSI_COMPLETION:
 289                 if (IS_QLA2100(ha) || IS_QLA2200(ha))
 290                         handles[0] = le32_to_cpu(
 291                             ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
 292                             RD_MAILBOX_REG(ha, reg, 1));
 293                 else
 294                         handles[0] = le32_to_cpu(
 295                             ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
 296                             MSW(mbx));
 297                 handle_cnt = 1;
 298                 break;
 299         case MBA_CMPLT_1_16BIT:
 300                 if (IS_QLA2100(ha) || IS_QLA2200(ha))
 301                         handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
 302                 else
 303                         handles[0] = MSW(mbx);
 304                 handle_cnt = 1;
 305                 mb[0] = MBA_SCSI_COMPLETION;
 306                 break;
 307         case MBA_CMPLT_2_16BIT:
 308                 handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
 309                 handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
 310                 handle_cnt = 2;
 311                 mb[0] = MBA_SCSI_COMPLETION;
 312                 break;
 313         case MBA_CMPLT_3_16BIT:
 314                 handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
 315                 handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
 316                 handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
 317                 handle_cnt = 3;
 318                 mb[0] = MBA_SCSI_COMPLETION;
 319                 break;
 320         case MBA_CMPLT_4_16BIT:
 321                 handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
 322                 handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
 323                 handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
 324                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 325                 handle_cnt = 4;
 326                 mb[0] = MBA_SCSI_COMPLETION;
 327                 break;
 328         case MBA_CMPLT_5_16BIT:
 329                 handles[0] = (uint32_t)RD_MAILBOX_REG(ha, reg, 1);
 330                 handles[1] = (uint32_t)RD_MAILBOX_REG(ha, reg, 2);
 331                 handles[2] = (uint32_t)RD_MAILBOX_REG(ha, reg, 3);
 332                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 333                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 334                 handle_cnt = 5;
 335                 mb[0] = MBA_SCSI_COMPLETION;
 336                 break;
 337         case MBA_CMPLT_2_32BIT:
 338                 handles[0] = le32_to_cpu(
 339                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 2) << 16)) |
 340                     RD_MAILBOX_REG(ha, reg, 1));
 341                 handles[1] = le32_to_cpu(
 342                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 343                     RD_MAILBOX_REG(ha, reg, 6));
 344                 handle_cnt = 2;
 345                 mb[0] = MBA_SCSI_COMPLETION;
 346                 break;
 347         default:
 348                 break;
 349         }
 350
 351         switch (mb[0]) {
 352         case MBA_SCSI_COMPLETION:       /* Fast Post */
 353                 if (!ha->flags.online)
 354                         break;
 355
 356                 for (cnt = 0; cnt < handle_cnt; cnt++)
 357                         qla2x00_process_completed_request(ha, handles[cnt]);
 358                 break;
 359
 360         case MBA_RESET:                 /* Reset */
 361                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 362
 363                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 364                 break;
 365
 366         case MBA_SYSTEM_ERR:            /* System Error */
 367                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 368                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 369                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 370
 371                 qla_printk(KERN_INFO, ha,
 372                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 373                     mb[1], mb[2], mb[3]);
 374
 375                 if (IS_QLA2100(ha) || IS_QLA2200(ha))
 376                         qla2100_fw_dump(ha, 1);
 377                 else
 378                         qla2300_fw_dump(ha, 1);
 379
 380                 if (mb[1] == 0) {
 381                         qla_printk(KERN_INFO, ha,
 382                             "Unrecoverable Hardware Error: adapter marked "
 383                             "OFFLINE!\n");
 384                         ha->flags.online = 0;
 385                 } else
 386                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 387                 break;
 388
 389         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 390                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 391                     ha->host_no));
 392                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 393
 394                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 395                 break;
 396
 397         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 398                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 399                     ha->host_no));
 400                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 401
 402                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 403                 break;
 404
 405         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 406                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 407                     ha->host_no));
 408                 break;
 409
 410         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 411                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 412
 413                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 414                     mb[1]));
 415                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 416
 417                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 418                         atomic_set(&ha->loop_state, LOOP_DOWN);
 419                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 420                         qla2x00_mark_all_devices_lost(ha);
 421                 }
 422
 423                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 424
 425                 ha->flags.management_server_logged_in = 0;
 426
 427                 /* Update AEN queue. */
 428                 qla2x00_enqueue_aen(ha, MBA_LIP_OCCURRED, NULL);
 429
 430                 ha->total_lip_cnt++;
 431                 break;
 432
 433         case MBA_LOOP_UP:               /* Loop Up Event */
 434                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 435
 436                 ha->link_data_rate = 0;
 437                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 438                         link_speed = link_speeds[0];
 439                 } else {
 440                         link_speed = link_speeds[3];
 441                         if (mb[1] < 5)
 442                                 link_speed = link_speeds[mb[1]];
 443                         ha->link_data_rate = mb[1];
 444                 }
 445
 446                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 447                     ha->host_no, link_speed));
 448                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 449                     link_speed);
 450
 451                 ha->flags.management_server_logged_in = 0;
 452
 453                 /* Update AEN queue. */
 454                 qla2x00_enqueue_aen(ha, MBA_LOOP_UP, NULL);
 455                 break;
 456
 457         case MBA_LOOP_DOWN:             /* Loop Down Event */
 458                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN.\n",
 459                     ha->host_no));
 460                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected.\n");
 461
 462                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 463                         atomic_set(&ha->loop_state, LOOP_DOWN);
 464                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 465                         ha->device_flags |= DFLG_NO_CABLE;
 466                         qla2x00_mark_all_devices_lost(ha);
 467                 }
 468
 469                 ha->flags.management_server_logged_in = 0;
 470                 ha->link_data_rate = 0;
 471
 472                 /* Update AEN queue. */
 473                 qla2x00_enqueue_aen(ha, MBA_LOOP_DOWN, NULL);
 474                 break;
 475
 476         case MBA_LIP_RESET:             /* LIP reset occurred */
 477                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 478
 479                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 480                     ha->host_no, mb[1]));
 481                 qla_printk(KERN_INFO, ha,
 482                     "LIP reset occured (%x).\n", mb[1]);
 483
 484                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 485                         atomic_set(&ha->loop_state, LOOP_DOWN);
 486                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 487                         qla2x00_mark_all_devices_lost(ha);
 488                 }
 489
 490                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 491
 492                 ha->operating_mode = LOOP;
 493                 ha->flags.management_server_logged_in = 0;
 494
 495                 /* Update AEN queue. */
 496                 qla2x00_enqueue_aen(ha, MBA_LIP_RESET, NULL);
 497
 498                 ha->total_lip_cnt++;
 499                 break;
 500
 501         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 502                 if (IS_QLA2100(ha))
 503                         break;
 504
 505                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 506                     ha->host_no));
 507
 508                 /*
 509                  * Until there's a transition from loop down to loop up, treat
 510                  * this as loop down only.
 511                  */
 512                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 513                         atomic_set(&ha->loop_state, LOOP_DOWN);
 514                         if (!atomic_read(&ha->loop_down_timer))
 515                                 atomic_set(&ha->loop_down_timer,
 516                                     LOOP_DOWN_TIME);
 517                         qla2x00_mark_all_devices_lost(ha);
 518                 }
 519
 520                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 521                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 522                 }
 523                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 524                 break;
 525
 526         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 527                 if (IS_QLA2100(ha))
 528                         break;
 529
 530                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 531
 532                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 533                     "received.\n",
 534                     ha->host_no));
 535                 qla_printk(KERN_INFO, ha,
 536                     "Configuration change detected: value=%x.\n", mb[1]);
 537
 538                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 539                         atomic_set(&ha->loop_state, LOOP_DOWN);
 540                         if (!atomic_read(&ha->loop_down_timer))
 541                                 atomic_set(&ha->loop_down_timer,
 542                                     LOOP_DOWN_TIME);
 543                         qla2x00_mark_all_devices_lost(ha);
 544                 }
 545
 546                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 547                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 548                 break;
 549
 550         case MBA_PORT_UPDATE:           /* Port database update */
 551                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 552                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 553
 554                 /*
 555                  * If a single remote port just logged into (or logged out of)
 556                  * us, create a new entry in our rscn fcports list and handle
 557                  * the event like an RSCN.
 558                  */
 559                 if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
 560                     !IS_QLA6322(ha) && ha->flags.init_done && mb[1] != 0xffff &&
 561                     ((ha->operating_mode == P2P && mb[1] != 0) ||
 562                     (ha->operating_mode != P2P && mb[1] !=
 563                         SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
 564                         int rval;
 565                         fc_port_t *rscn_fcport;
 566
 567                         /* Create new fcport for login. */
 568                         rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
 569                         if (rscn_fcport) {
 570                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 571                                     "creating RSCN fcport %p for %x/%x.\n",
 572                                     ha->host_no, rscn_fcport, mb[1], mb[2]));
 573
 574                                 rscn_fcport->loop_id = mb[1];
 575                                 rscn_fcport->d_id.b24 = INVALID_PORT_ID;
 576                                 atomic_set(&rscn_fcport->state,
 577                                     FCS_DEVICE_LOST);
 578                                 list_add_tail(&rscn_fcport->list,
 579                                     &ha->rscn_fcports);
 580
 581                                 rval = qla2x00_handle_port_rscn(ha, 0,
 582                                     rscn_fcport, 1);
 583                                 if (rval == QLA_SUCCESS)
 584                                         break;
 585                         } else {
 586                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 587                                     "-- unable to allocate RSCN fcport "
 588                                     "login.\n", ha->host_no));
 589                         }
 590                 }
 591
 592                 /*
 593                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 594                  * event etc. earlier indicating loop is down) then process
 595                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 596                  */
 597                 atomic_set(&ha->loop_down_timer, 0);
 598                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 599                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 600                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 601                             "ignored.\n", ha->host_no));
 602                         break;
 603                 }
 604
 605                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 606                     ha->host_no));
 607                 DEBUG(printk(KERN_INFO
 608                     "scsi(%ld): Port database changed %04x %04x.\n",
 609                     ha->host_no, mb[1], mb[2]));
 610
 611                 /*
 612                  * Mark all devices as missing so we will login again.
 613                  */
 614                 atomic_set(&ha->loop_state, LOOP_UP);
 615
 616                 qla2x00_mark_all_devices_lost(ha);
 617
 618                 ha->flags.rscn_queue_overflow = 1;
 619
 620                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 621                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 622
 623                 /* Update AEN queue. */
 624                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
 625                 break;
 626
 627         case MBA_RSCN_UPDATE:           /* State Change Registration */
 628                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 629                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 630
 631                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 632                     ha->host_no));
 633                 DEBUG(printk(KERN_INFO
 634                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 635                     ha->host_no, mb[1], mb[2]));
 636
 637                 rscn_entry = (mb[1] << 16) | mb[2];
 638                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 639                     ha->d_id.b.al_pa;
 640                 if (rscn_entry == host_pid) {
 641                         DEBUG(printk(KERN_INFO
 642                             "scsi(%ld): Ignoring RSCN update to local host "
 643                             "port ID (%06x)\n",
 644                             ha->host_no, host_pid));
 645                         break;
 646                 }
 647
 648                 rscn_queue_index = ha->rscn_in_ptr + 1;
 649                 if (rscn_queue_index == MAX_RSCN_COUNT)
 650                         rscn_queue_index = 0;
 651                 if (rscn_queue_index != ha->rscn_out_ptr) {
 652                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 653                         ha->rscn_in_ptr = rscn_queue_index;
 654                 } else {
 655                         ha->flags.rscn_queue_overflow = 1;
 656                 }
 657
 658                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 659                 atomic_set(&ha->loop_down_timer, 0);
 660                 ha->flags.management_server_logged_in = 0;
 661
 662                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 663                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 664
 665                 /* Update AEN queue. */
 666                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
 667                 break;
 668
 669         /* case MBA_RIO_RESPONSE: */
 670         case MBA_ZIO_RESPONSE:
 671                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 672                     ha->host_no));
 673                 DEBUG(printk(KERN_INFO
 674                     "scsi(%ld): [R|Z]IO update completion.\n",
 675                     ha->host_no));
 676
 677                 qla2x00_process_response_queue(ha);
 678                 break;
 679         }
 680 }
 681
 682 /**
 683  * qla2x00_process_completed_request() - Process a Fast Post response.
 684  * @ha: SCSI driver HA context
 685  * @index: SRB index
 686  */
 687 static void
 688 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 689 {
 690         srb_t *sp;
 691
 692         /* Validate handle. */
 693         if (index >= MAX_OUTSTANDING_COMMANDS) {
 694                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 695                     ha->host_no, index));
 696                 qla_printk(KERN_WARNING, ha,
 697                     "Invalid SCSI completion handle %d.\n", index);
 698
 699                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 700                 return;
 701         }
 702
 703         sp = ha->outstanding_cmds[index];
 704         if (sp) {
 705                 /* Free outstanding command slot. */
 706                 ha->outstanding_cmds[index] = NULL;
 707
 708                 if (ha->actthreads)
 709                         ha->actthreads--;
 710                 sp->lun_queue->out_cnt--;
 711                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 712                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 713
 714                 /* Save ISP completion status */
 715                 sp->cmd->result = DID_OK << 16;
 716                 sp->fo_retry_cnt = 0;
 717                 add_to_done_queue(ha, sp);
 718         } else {
 719                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 720                     ha->host_no));
 721                 qla_printk(KERN_WARNING, ha,
 722                     "Invalid ISP SCSI completion handle\n");
 723
 724                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 725         }
 726 }
 727
 728 /**
 729  * qla2x00_process_response_queue() - Process response queue entries.
 730  * @ha: SCSI driver HA context
 731  */
 732 void
 733 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 734 {
 735         device_reg_t __iomem *reg = ha->iobase;
 736         sts_entry_t     *pkt;
 737         uint16_t        handle_cnt;
 738         uint16_t        cnt;
 739
 740         if (!ha->flags.online)
 741                 return;
 742
 743         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 744                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 745
 746                 ha->rsp_ring_index++;
 747                 if (ha->rsp_ring_index == ha->response_q_length) {
 748                         ha->rsp_ring_index = 0;
 749                         ha->response_ring_ptr = ha->response_ring;
 750                 } else {
 751                         ha->response_ring_ptr++;
 752                 }
 753
 754                 if (pkt->entry_status != 0) {
 755                         DEBUG3(printk(KERN_INFO
 756                             "scsi(%ld): Process error entry.\n", ha->host_no));
 757
 758                         qla2x00_error_entry(ha, pkt);
 759                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 760                         wmb();
 761                         continue;
 762                 }
 763
 764                 switch (pkt->entry_type) {
 765                 case STATUS_TYPE:
 766                         qla2x00_status_entry(ha, pkt);
 767                         break;
 768                 case STATUS_TYPE_21:
 769                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 770                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 771                                 qla2x00_process_completed_request(ha,
 772                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 773                         }
 774                         break;
 775                 case STATUS_TYPE_22:
 776                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 777                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 778                                 qla2x00_process_completed_request(ha,
 779                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 780                         }
 781                         break;
 782                 case STATUS_CONT_TYPE:
 783                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 784                         break;
 785                 case MS_IOCB_TYPE:
 786                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 787                         break;
 788                 case MBX_IOCB_TYPE:
 789                         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
 790                             !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
 791                                 if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
 792                                         qla2x00_process_iodesc(ha,
 793                                             (struct mbx_entry *)pkt);
 794                                 } else {
 795                                         /* MBX IOCB Type Not Supported. */
 796                                         DEBUG4(printk(KERN_WARNING
 797                                             "scsi(%ld): Received unknown MBX "
 798                                             "IOCB response pkt type=%x "
 799                                             "source=%x entry status=%x.\n",
 800                                             ha->host_no, pkt->entry_type,
 801                                             pkt->sys_define,
 802                                             pkt->entry_status));
 803                                 }
 804                                 break;
 805                         }
 806                         /* Fallthrough. */
 807                 default:
 808                         /* Type Not Supported. */
 809                         DEBUG4(printk(KERN_WARNING
 810                             "scsi(%ld): Received unknown response pkt type %x "
 811                             "entry status=%x.\n",
 812                             ha->host_no, pkt->entry_type, pkt->entry_status));
 813                         break;
 814                 }
 815                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 816                 wmb();
 817         }
 818
 819         /* Adjust ring index */
 820         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 821 }
 822
 823 /**
 824  * qla2x00_status_entry() - Process a Status IOCB entry.
 825  * @ha: SCSI driver HA context
 826  * @pkt: Entry pointer
 827  */
 828 static void
 829 qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
 830 {
 831         int             ret;
 832         unsigned        b, t, l;
 833         srb_t           *sp;
 834         os_lun_t        *lq;
 835         os_tgt_t        *tq;
 836         fc_port_t       *fcport;
 837         struct scsi_cmnd *cp;
 838         uint16_t        comp_status;
 839         uint16_t        scsi_status;
 840         uint8_t         lscsi_status;
 841         int32_t         resid;
 842         uint8_t         sense_sz = 0;
 843         uint16_t        rsp_info_len;
 844
 845         /* Fast path completion. */
 846         if (le16_to_cpu(pkt->comp_status) == CS_COMPLETE &&
 847             (le16_to_cpu(pkt->scsi_status) & SS_MASK) == 0) {
 848                 qla2x00_process_completed_request(ha, pkt->handle);
 849
 850                 return;
 851         }
 852
 853         /* Validate handle. */
 854         if (pkt->handle < MAX_OUTSTANDING_COMMANDS) {
 855                 sp = ha->outstanding_cmds[pkt->handle];
 856                 ha->outstanding_cmds[pkt->handle] = NULL;
 857         } else
 858                 sp = NULL;
 859
 860         if (sp == NULL) {
 861                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 862                     ha->host_no));
 863                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 864
 865                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 866                 if (ha->dpc_wait && !ha->dpc_active)
 867                         up(ha->dpc_wait);
 868
 869                 return;
 870         }
 871         cp = sp->cmd;
 872         if (cp == NULL) {
 873                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 874                     "pkt->handle=%d sp=%p sp->state:%d\n",
 875                     ha->host_no, pkt->handle, sp, sp->state));
 876                 qla_printk(KERN_WARNING, ha,
 877                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 878
 879                 return;
 880         }
 881
 882         if (ha->actthreads)
 883                 ha->actthreads--;
 884
 885         if (sp->lun_queue == NULL) {
 886                 DEBUG2(printk("scsi(%ld): Status Entry invalid lun pointer.\n",
 887                     ha->host_no));
 888                 qla_printk(KERN_WARNING, ha,
 889                     "Status Entry invalid lun pointer.\n");
 890
 891                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 892                 if (ha->dpc_wait && !ha->dpc_active)
 893                         up(ha->dpc_wait);
 894
 895                 return;
 896         }
 897
 898         sp->lun_queue->out_cnt--;
 899
 900         comp_status = le16_to_cpu(pkt->comp_status);
 901         /* Mask of reserved bits 12-15, before we examine the scsi status */
 902         scsi_status = le16_to_cpu(pkt->scsi_status) & SS_MASK;
 903         lscsi_status = scsi_status & STATUS_MASK;
 904
 905         CMD_ENTRY_STATUS(cp) = pkt->entry_status;
 906         CMD_COMPL_STATUS(cp) = comp_status;
 907         CMD_SCSI_STATUS(cp) = scsi_status;
 908
 909         /* Generate LU queue on cntrl, target, LUN */
 910         b = cp->device->channel;
 911         t = cp->device->id;
 912         l = cp->device->lun,
 913
 914         tq = sp->tgt_queue;
 915         lq = sp->lun_queue;
 916
 917         /*
 918          * If loop is in transient state Report DID_BUS_BUSY
 919          */
 920         if ((comp_status != CS_COMPLETE || scsi_status != 0)) {
 921                 if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
 922                     (atomic_read(&ha->loop_down_timer) ||
 923                         atomic_read(&ha->loop_state) != LOOP_READY)) {
 924
 925                         DEBUG2(printk("scsi(%ld:%d:%d:%d): Loop Not Ready - "
 926                             "pid=%lx.\n",
 927                             ha->host_no, b, t, l, cp->serial_number));
 928
 929                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
 930                         add_to_retry_queue(ha, sp);
 931                         return;
 932                 }
 933         }
 934
 935         /* Check for any FCP transport errors. */
 936         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 937                 rsp_info_len = le16_to_cpu(pkt->rsp_info_len);
 938                 if (rsp_info_len > 3 && pkt->rsp_info[3]) {
 939                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 940                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 941                             "retrying command\n", ha->host_no, b, t, l,
 942                             rsp_info_len, pkt->rsp_info[0], pkt->rsp_info[1],
 943                             pkt->rsp_info[2], pkt->rsp_info[3],
 944                             pkt->rsp_info[4], pkt->rsp_info[5],
 945                             pkt->rsp_info[6], pkt->rsp_info[7]));
 946
 947                         cp->result = DID_BUS_BUSY << 16;
 948                         add_to_done_queue(ha, sp);
 949                         return;
 950                 }
 951         }
 952
 953         /*
 954          * Based on Host and scsi status generate status code for Linux
 955          */
 956         switch (comp_status) {
 957         case CS_COMPLETE:
 958                 if (scsi_status == 0) {
 959                         cp->result = DID_OK << 16;
 960                         break;
 961                 }
 962                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 963                         resid = le32_to_cpu(pkt->residual_length);
 964                         cp->resid = resid;
 965                         CMD_RESID_LEN(cp) = resid;
 966                 }
 967                 if (lscsi_status == SS_BUSY_CONDITION) {
 968                         cp->result = DID_BUS_BUSY << 16 | lscsi_status;
 969                         break;
 970                 }
 971
 972                 cp->result = DID_OK << 16 | lscsi_status;
 973
 974                 if (lscsi_status != SS_CHECK_CONDITION)
 975                         break;
 976
 977                 /*
 978                  * Copy Sense Data into sense buffer
 979                  */
 980                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 981
 982                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 983                         break;
 984
 985                 if (le16_to_cpu(pkt->req_sense_length) <
 986                     sizeof(cp->sense_buffer))
 987                         sense_sz = le16_to_cpu(pkt->req_sense_length);
 988                 else
 989                         sense_sz = sizeof(cp->sense_buffer);
 990
 991                 CMD_ACTUAL_SNSLEN(cp) = sense_sz;
 992                 sp->request_sense_length = sense_sz;
 993                 sp->request_sense_ptr = cp->sense_buffer;
 994
 995                 if (sp->request_sense_length > 32)
 996                         sense_sz = 32;
 997
 998                 memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);
 999
1000                 sp->request_sense_ptr += sense_sz;
1001                 sp->request_sense_length -= sense_sz;
1002                 if (sp->request_sense_length != 0)
1003                         ha->status_srb = sp;
1004
1005                 if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
1006                     qla2x00_check_sense(cp, lq) == QLA_SUCCESS) {
1007                         /* Throw away status_cont if any */
1008                         ha->status_srb = NULL;
1009                         add_to_scsi_retry_queue(ha, sp);
1010                         return;
1011                 }
1012
1013                 DEBUG5(printk("%s(): Check condition Sense data, "
1014                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1015                     __func__, ha->host_no, b, t, l, cp,
1016                     cp->serial_number));
1017                 if (sense_sz)
1018                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1019                             CMD_ACTUAL_SNSLEN(cp)));
1020                 break;
1021
1022         case CS_DATA_UNDERRUN:
1023                 DEBUG2(printk(KERN_INFO
1024                     "scsi(%ld:%d:%d) UNDERRUN status detected 0x%x-0x%x.\n",
1025                     ha->host_no, t, l, comp_status, scsi_status));
1026
1027                 resid = le32_to_cpu(pkt->residual_length);
1028                 if (scsi_status & SS_RESIDUAL_UNDER) {
1029                         cp->resid = resid;
1030                         CMD_RESID_LEN(cp) = resid;
1031                 }
1032
1033                 /*
1034                  * Check to see if SCSI Status is non zero. If so report SCSI
1035                  * Status.
1036                  */
1037                 if (lscsi_status != 0) {
1038                         if (lscsi_status == SS_BUSY_CONDITION) {
1039                                 cp->result = DID_BUS_BUSY << 16 |
1040                                     lscsi_status;
1041                                 break;
1042                         }
1043
1044                         cp->result = DID_OK << 16 | lscsi_status;
1045
1046                         if (lscsi_status != SS_CHECK_CONDITION)
1047                                 break;
1048
1049                         /* Copy Sense Data into sense buffer */
1050                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1051
1052                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1053                                 break;
1054
1055                         if (le16_to_cpu(pkt->req_sense_length) <
1056                             sizeof(cp->sense_buffer))
1057                                 sense_sz = le16_to_cpu(pkt->req_sense_length);
1058                         else
1059                                 sense_sz = sizeof(cp->sense_buffer);
1060
1061                         CMD_ACTUAL_SNSLEN(cp) = sense_sz;
1062                         sp->request_sense_length = sense_sz;
1063                         sp->request_sense_ptr = cp->sense_buffer;
1064
1065                         if (sp->request_sense_length > 32)
1066                                 sense_sz = 32;
1067
1068                         memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);
1069
1070                         sp->request_sense_ptr += sense_sz;
1071                         sp->request_sense_length -= sense_sz;
1072                         if (sp->request_sense_length != 0)
1073                                 ha->status_srb = sp;
1074
1075                         if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
1076                             (qla2x00_check_sense(cp, lq) == QLA_SUCCESS)) {
1077                                 ha->status_srb = NULL;
1078                                 add_to_scsi_retry_queue(ha, sp);
1079                                 return;
1080                         }
1081                         DEBUG5(printk("%s(): Check condition Sense data, "
1082                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1083                             __func__, ha->host_no, b, t, l, cp,
1084                             cp->serial_number));
1085                         if (sense_sz)
1086                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1087                                     CMD_ACTUAL_SNSLEN(cp)));
1088                 } else {
1089                         /*
1090                          * If RISC reports underrun and target does not report
1091                          * it then we must have a lost frame, so tell upper
1092                          * layer to retry it by reporting a bus busy.
1093                          */
1094                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1095                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1096                                     "frame(s) detected (%x of %x bytes)..."
1097                                     "retrying command.\n",
1098                                     ha->host_no, b, t, l, resid,
1099                                     cp->request_bufflen));
1100
1101                                 cp->result = DID_BUS_BUSY << 16;
1102                                 ha->dropped_frame_error_cnt++;
1103                                 break;
1104                         }
1105
1106                         /* Handle mid-layer underflow */
1107                         if ((unsigned)(cp->request_bufflen - resid) <
1108                             cp->underflow) {
1109                                 qla_printk(KERN_INFO, ha,
1110                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1111                                     "detected (%x of %x bytes)...returning "
1112                                     "error status.\n",
1113                                     ha->host_no, b, t, l, resid,
1114                                     cp->request_bufflen);
1115
1116                                 cp->result = DID_ERROR << 16;
1117                                 break;
1118                         }
1119
1120                         /* Everybody online, looking good... */
1121                         cp->result = DID_OK << 16;
1122                 }
1123                 break;
1124
1125         case CS_DATA_OVERRUN:
1126                 DEBUG2(printk(KERN_INFO
1127                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1128                     ha->host_no, t, l, comp_status, scsi_status));
1129                 DEBUG2(printk(KERN_INFO
1130                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1131                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1132                     cp->cmnd[4], cp->cmnd[5]));
1133                 DEBUG2(printk(KERN_INFO
1134                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1135                     "status!\n",
1136                     cp->serial_number, cp->request_bufflen,
1137                     le32_to_cpu(pkt->residual_length)));
1138
1139                 cp->result = DID_ERROR << 16;
1140                 break;
1141
1142         case CS_PORT_LOGGED_OUT:
1143         case CS_PORT_CONFIG_CHG:
1144         case CS_PORT_BUSY:
1145         case CS_INCOMPLETE:
1146         case CS_PORT_UNAVAILABLE:
1147                 /*
1148                  * If the port is in Target Down state, return all IOs for this
1149                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1150                  * retry_queue.
1151                  */
1152                 fcport = sp->fclun->fcport;
1153                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1154                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1155                     ha->host_no, t, l, cp->serial_number, comp_status,
1156                     atomic_read(&fcport->state)));
1157
1158                 if ((sp->flags & (SRB_IOCTL | SRB_TAPE)) ||
1159                     atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
1160                         cp->result = DID_NO_CONNECT << 16;
1161                         if (atomic_read(&ha->loop_state) == LOOP_DOWN)
1162                                 sp->err_id = SRB_ERR_LOOP;
1163                         else
1164                                 sp->err_id = SRB_ERR_PORT;
1165                         add_to_done_queue(ha, sp);
1166                 } else {
1167                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
1168                         add_to_retry_queue(ha, sp);
1169                 }
1170
1171                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1172                         qla2x00_mark_device_lost(ha, fcport, 1);
1173                 }
1174
1175                 return;
1176                 break;
1177
1178         case CS_RESET:
1179                 DEBUG2(printk(KERN_INFO
1180                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1181                     ha->host_no, comp_status, scsi_status));
1182
1183                 if (sp->flags & (SRB_IOCTL | SRB_TAPE)) {
1184                         cp->result = DID_RESET << 16;
1185                 } else {
1186                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
1187                         add_to_retry_queue(ha, sp);
1188                         return;
1189                 }
1190                 break;
1191
1192         case CS_ABORTED:
1193                 /*
1194                  * hv2.19.12 - DID_ABORT does not retry the request if we
1195                  * aborted this request then abort otherwise it must be a
1196                  * reset.
1197                  */
1198                 DEBUG2(printk(KERN_INFO
1199                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1200                     ha->host_no, comp_status, scsi_status));
1201
1202                 cp->result = DID_RESET << 16;
1203                 break;
1204
1205         case CS_TIMEOUT:
1206                 DEBUG2(printk(KERN_INFO
1207                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1208                     "sflags=%x.\n", ha->host_no, b, t, l, comp_status,
1209                     scsi_status, le16_to_cpu(pkt->status_flags)));
1210
1211                 cp->result = DID_BUS_BUSY << 16;
1212
1213                 fcport = lq->fclun->fcport;
1214
1215                 /* Check to see if logout occurred */
1216                 if ((le16_to_cpu(pkt->status_flags) & SF_LOGOUT_SENT)) {
1217                         qla2x00_mark_device_lost(ha, fcport, 1);
1218                 }
1219                 break;
1220
1221         case CS_QUEUE_FULL:
1222                 DEBUG2(printk(KERN_INFO
1223                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1224                     ha->host_no, comp_status, scsi_status));
1225
1226                 /* SCSI Mid-Layer handles device queue full */
1227
1228                 cp->result = DID_OK << 16 | lscsi_status;
1229
1230                 /* TODO: ??? */
1231                 /* Adjust queue depth */
1232                 ret = scsi_track_queue_full(cp->device,
1233                     sp->lun_queue->out_cnt - 1);
1234                 if (ret) {
1235                         qla_printk(KERN_INFO, ha,
1236                             "scsi(%ld:%d:%d:%d): Queue depth adjusted to %d.\n",
1237                             ha->host_no, cp->device->channel, cp->device->id,
1238                             cp->device->lun, ret);
1239                 }
1240                 break;
1241
1242         default:
1243                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1244                     "0x%x-0x%x.\n",
1245                     ha->host_no, comp_status, scsi_status));
1246                 qla_printk(KERN_INFO, ha,
1247                     "Unknown status detected 0x%x-0x%x.\n",
1248                     comp_status, scsi_status);
1249
1250                 cp->result = DID_ERROR << 16;
1251                 break;
1252         }
1253
1254         /* Place command on done queue. */
1255         if (ha->status_srb == NULL)
1256                 add_to_done_queue(ha, sp);
1257 }
1258
1259 /**
1260  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1261  * @ha: SCSI driver HA context
1262  * @pkt: Entry pointer
1263  *
1264  * Extended sense data.
1265  */
1266 static void
1267 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1268 {
1269         uint8_t         sense_sz = 0;
1270         srb_t           *sp = ha->status_srb;
1271         struct scsi_cmnd *cp;
1272
1273         if (sp != NULL && sp->request_sense_length != 0) {
1274                 cp = sp->cmd;
1275                 if (cp == NULL) {
1276                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1277                             "sp=%p sp->state:%d\n", __func__, sp, sp->state));
1278                         qla_printk(KERN_INFO, ha,
1279                             "cmd is NULL: already returned to OS (sp=%p)\n",
1280                             sp);
1281
1282                         ha->status_srb = NULL;
1283                         return;
1284                 }
1285
1286                 if (sp->request_sense_length > sizeof(pkt->data)) {
1287                         sense_sz = sizeof(pkt->data);
1288                 } else {
1289                         sense_sz = sp->request_sense_length;
1290                 }
1291
1292                 /* Move sense data. */
1293                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1294                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1295
1296                 sp->request_sense_ptr += sense_sz;
1297                 sp->request_sense_length -= sense_sz;
1298
1299                 /* Place command on done queue. */
1300                 if (sp->request_sense_length == 0) {
1301                         add_to_done_queue(ha, sp);
1302                         ha->status_srb = NULL;
1303                 }
1304         }
1305 }
1306
1307 /**
1308  * qla2x00_error_entry() - Process an error entry.
1309  * @ha: SCSI driver HA context
1310  * @pkt: Entry pointer
1311  */
1312 static void
1313 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1314 {
1315         srb_t *sp;
1316
1317 #if defined(QL_DEBUG_LEVEL_2)
1318         if (pkt->entry_status & RF_INV_E_ORDER)
1319                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1320         else if (pkt->entry_status & RF_INV_E_COUNT)
1321                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1322         else if (pkt->entry_status & RF_INV_E_PARAM)
1323                 qla_printk(KERN_ERR, ha,
1324                     "%s: Invalid Entry Parameter\n", __func__);
1325         else if (pkt->entry_status & RF_INV_E_TYPE)
1326                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1327         else if (pkt->entry_status & RF_BUSY)
1328                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1329         else
1330                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1331 #endif
1332
1333         /* Validate handle. */
1334         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1335                 sp = ha->outstanding_cmds[pkt->handle];
1336         else
1337                 sp = NULL;
1338
1339         if (sp) {
1340                 /* Free outstanding command slot. */
1341                 ha->outstanding_cmds[pkt->handle] = NULL;
1342                 if (ha->actthreads)
1343                         ha->actthreads--;
1344                 sp->lun_queue->out_cnt--;
1345
1346                 /* Bad payload or header */
1347                 if (pkt->entry_status &
1348                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1349                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1350                         sp->cmd->result = DID_ERROR << 16;
1351                 } else if (pkt->entry_status & RF_BUSY) {
1352                         sp->cmd->result = DID_BUS_BUSY << 16;
1353                 } else {
1354                         sp->cmd->result = DID_ERROR << 16;
1355                 }
1356                 /* Place command on done queue. */
1357                 add_to_done_queue(ha, sp);
1358
1359         } else if (pkt->entry_type == COMMAND_A64_TYPE ||
1360             pkt->entry_type == COMMAND_TYPE) {
1361                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1362                     ha->host_no));
1363                 qla_printk(KERN_WARNING, ha,
1364                     "Error entry - invalid handle\n");
1365
1366                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1367                 if (ha->dpc_wait && !ha->dpc_active)
1368                         up(ha->dpc_wait);
1369         }
1370 }
1371
1372 /**
1373  * qla2x00_ms_entry() - Process a Management Server entry.
1374  * @ha: SCSI driver HA context
1375  * @index: Response queue out pointer
1376  */
1377 static void
1378 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1379 {
1380         srb_t          *sp;
1381
1382         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1383             __func__, ha->host_no, pkt, pkt->handle1));
1384
1385         /* Validate handle. */
1386         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1387                 sp = ha->outstanding_cmds[pkt->handle1];
1388         else
1389                 sp = NULL;
1390
1391         if (sp == NULL) {
1392                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1393                     ha->host_no));
1394                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1395
1396                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1397                 return;
1398         }
1399
1400         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1401         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1402
1403         /* Free outstanding command slot. */
1404         ha->outstanding_cmds[pkt->handle1] = NULL;
1405
1406         add_to_done_queue(ha, sp);
1407 }
1408
1409 /**
1410  * qla2x00_check_sense() - Perform any sense data interrogation.
1411  * @cp: SCSI Command
1412  * @lq: Lun queue
1413  *
1414  * Returns QLA_SUCCESS if the lun queue is suspended, else
1415  * QLA_FUNCTION_FAILED  (lun queue not suspended).
1416  */
1417 static int
1418 qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *lq)
1419 {
1420         scsi_qla_host_t *ha;
1421         srb_t           *sp;
1422         fc_port_t       *fcport;
1423
1424         ha = (scsi_qla_host_t *) cp->device->host->hostdata;
1425         if ((cp->sense_buffer[0] & 0x70) != 0x70) {
1426                 return (QLA_FUNCTION_FAILED);
1427         }
1428
1429         sp = (srb_t * )CMD_SP(cp);
1430         sp->flags |= SRB_GOT_SENSE;
1431
1432         switch (cp->sense_buffer[2] & 0xf) {
1433         case RECOVERED_ERROR:
1434                 cp->result = DID_OK << 16;
1435                 cp->sense_buffer[0] = 0;
1436                 break;
1437
1438         case NOT_READY:
1439                 fcport = lq->fclun->fcport;
1440
1441                 /*
1442                  * Suspend the lun only for hard disk device type.
1443                  */
1444                 if ((fcport->flags & FCF_TAPE_PRESENT) == 0 &&
1445                     lq->q_state != LUN_STATE_TIMEOUT) {
1446                         /*
1447                          * If target is in process of being ready then suspend
1448                          * lun for 6 secs and retry all the commands.
1449                          */
1450                         if (cp->sense_buffer[12] == 0x4 &&
1451                             cp->sense_buffer[13] == 0x1) {
1452
1453                                 /* Suspend the lun for 6 secs */
1454                                 qla2x00_suspend_lun(ha, lq, 6,
1455                                     ql2xsuspendcount);
1456
1457                                 return (QLA_SUCCESS);
1458                         }
1459                 }
1460                 break;
1461         }
1462
1463         return (QLA_FUNCTION_FAILED);
1464 }