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                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 380                 break;
 381
 382         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 383                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 384                     ha->host_no));
 385                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 386
 387                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 388                 break;
 389
 390         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 391                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 392                     ha->host_no));
 393                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 394
 395                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 396                 break;
 397
 398         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 399                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 400                     ha->host_no));
 401                 break;
 402
 403         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 404                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 405
 406                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 407                     mb[1]));
 408                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 409
 410                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 411                         atomic_set(&ha->loop_state, LOOP_DOWN);
 412                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 413                         qla2x00_mark_all_devices_lost(ha);
 414                 }
 415
 416                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 417
 418                 ha->flags.management_server_logged_in = 0;
 419
 420                 /* Update AEN queue. */
 421                 qla2x00_enqueue_aen(ha, MBA_LIP_OCCURRED, NULL);
 422
 423                 ha->total_lip_cnt++;
 424                 break;
 425
 426         case MBA_LOOP_UP:               /* Loop Up Event */
 427                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 428
 429                 ha->link_data_rate = 0;
 430                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 431                         link_speed = link_speeds[0];
 432                 } else {
 433                         link_speed = link_speeds[3];
 434                         if (mb[1] < 5)
 435                                 link_speed = link_speeds[mb[1]];
 436                         ha->link_data_rate = mb[1];
 437                 }
 438
 439                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 440                     ha->host_no, link_speed));
 441                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 442                     link_speed);
 443
 444                 ha->flags.management_server_logged_in = 0;
 445
 446                 /* Update AEN queue. */
 447                 qla2x00_enqueue_aen(ha, MBA_LOOP_UP, NULL);
 448                 break;
 449
 450         case MBA_LOOP_DOWN:             /* Loop Down Event */
 451                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN.\n",
 452                     ha->host_no));
 453                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected.\n");
 454
 455                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 456                         atomic_set(&ha->loop_state, LOOP_DOWN);
 457                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 458                         ha->device_flags |= DFLG_NO_CABLE;
 459                         qla2x00_mark_all_devices_lost(ha);
 460                 }
 461
 462                 ha->flags.management_server_logged_in = 0;
 463                 ha->link_data_rate = 0;
 464
 465                 /* Update AEN queue. */
 466                 qla2x00_enqueue_aen(ha, MBA_LOOP_DOWN, NULL);
 467                 break;
 468
 469         case MBA_LIP_RESET:             /* LIP reset occurred */
 470                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 471
 472                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 473                     ha->host_no, mb[1]));
 474                 qla_printk(KERN_INFO, ha,
 475                     "LIP reset occured (%x).\n", mb[1]);
 476
 477                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 478                         atomic_set(&ha->loop_state, LOOP_DOWN);
 479                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 480                         qla2x00_mark_all_devices_lost(ha);
 481                 }
 482
 483                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 484
 485                 ha->operating_mode = LOOP;
 486                 ha->flags.management_server_logged_in = 0;
 487
 488                 /* Update AEN queue. */
 489                 qla2x00_enqueue_aen(ha, MBA_LIP_RESET, NULL);
 490
 491                 ha->total_lip_cnt++;
 492                 break;
 493
 494         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 495                 if (IS_QLA2100(ha))
 496                         break;
 497
 498                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 499                     ha->host_no));
 500
 501                 /*
 502                  * Until there's a transition from loop down to loop up, treat
 503                  * this as loop down only.
 504                  */
 505                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 506                         atomic_set(&ha->loop_state, LOOP_DOWN);
 507                         if (!atomic_read(&ha->loop_down_timer))
 508                                 atomic_set(&ha->loop_down_timer,
 509                                     LOOP_DOWN_TIME);
 510                         qla2x00_mark_all_devices_lost(ha);
 511                 }
 512
 513                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 514                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 515                 }
 516                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 517                 break;
 518
 519         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 520                 if (IS_QLA2100(ha))
 521                         break;
 522
 523                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 524
 525                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 526                     "received.\n",
 527                     ha->host_no));
 528                 qla_printk(KERN_INFO, ha,
 529                     "Configuration change detected: value=%x.\n", mb[1]);
 530
 531                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 532                         atomic_set(&ha->loop_state, LOOP_DOWN);
 533                         if (!atomic_read(&ha->loop_down_timer))
 534                                 atomic_set(&ha->loop_down_timer,
 535                                     LOOP_DOWN_TIME);
 536                         qla2x00_mark_all_devices_lost(ha);
 537                 }
 538
 539                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 540                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 541                 break;
 542
 543         case MBA_PORT_UPDATE:           /* Port database update */
 544                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 545                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 546
 547                 /*
 548                  * If a single remote port just logged into (or logged out of)
 549                  * us, create a new entry in our rscn fcports list and handle
 550                  * the event like an RSCN.
 551                  */
 552                 if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
 553                     !IS_QLA6322(ha) && ha->flags.init_done && mb[1] != 0xffff &&
 554                     ((ha->operating_mode == P2P && mb[1] != 0) ||
 555                     (ha->operating_mode != P2P && mb[1] !=
 556                         SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
 557                         int rval;
 558                         fc_port_t *rscn_fcport;
 559
 560                         /* Create new fcport for login. */
 561                         rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
 562                         if (rscn_fcport) {
 563                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 564                                     "creating RSCN fcport %p for login.\n",
 565                                     ha->host_no, rscn_fcport));
 566
 567                                 rscn_fcport->loop_id = mb[1];
 568                                 rscn_fcport->d_id.b24 = INVALID_PORT_ID;
 569                                 atomic_set(&rscn_fcport->state,
 570                                     FCS_DEVICE_LOST);
 571                                 list_add_tail(&rscn_fcport->list,
 572                                     &ha->rscn_fcports);
 573
 574                                 rval = qla2x00_handle_port_rscn(ha, 0,
 575                                     rscn_fcport, 1);
 576                                 if (rval == QLA_SUCCESS)
 577                                         break;
 578                         } else {
 579                                 DEBUG14(printk("scsi(%ld): Port Update -- "
 580                                     "-- unable to allocate RSCN fcport "
 581                                     "login.\n", ha->host_no));
 582                         }
 583                 }
 584
 585                 /*
 586                  * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
 587                  * event etc. earlier indicating loop is down) then process
 588                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 589                  */
 590                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 591                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 592                             "ignored.\n", ha->host_no));
 593                         break;
 594                 }
 595
 596                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 597                     ha->host_no));
 598                 DEBUG(printk(KERN_INFO
 599                     "scsi(%ld): Port database changed %04x %04x.\n",
 600                     ha->host_no, mb[1], mb[2]));
 601
 602                 /*
 603                  * Mark all devices as missing so we will login again.
 604                  */
 605                 atomic_set(&ha->loop_state, LOOP_UP);
 606
 607                 atomic_set(&ha->loop_down_timer, 0);
 608                 qla2x00_mark_all_devices_lost(ha);
 609
 610                 ha->flags.rscn_queue_overflow = 1;
 611
 612                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 613                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 614
 615                 /* Update AEN queue. */
 616                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
 617                 break;
 618
 619         case MBA_RSCN_UPDATE:           /* State Change Registration */
 620                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 621                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 622
 623                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 624                     ha->host_no));
 625                 DEBUG(printk(KERN_INFO
 626                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 627                     ha->host_no, mb[1], mb[2]));
 628
 629                 rscn_entry = (mb[1] << 16) | mb[2];
 630                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 631                     ha->d_id.b.al_pa;
 632                 if (rscn_entry == host_pid) {
 633                         DEBUG(printk(KERN_INFO
 634                             "scsi(%ld): Ignoring RSCN update to local host "
 635                             "port ID (%06x)\n",
 636                             ha->host_no, host_pid));
 637                         break;
 638                 }
 639
 640                 rscn_queue_index = ha->rscn_in_ptr + 1;
 641                 if (rscn_queue_index == MAX_RSCN_COUNT)
 642                         rscn_queue_index = 0;
 643                 if (rscn_queue_index != ha->rscn_out_ptr) {
 644                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 645                         ha->rscn_in_ptr = rscn_queue_index;
 646                 } else {
 647                         ha->flags.rscn_queue_overflow = 1;
 648                 }
 649
 650                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 651                 atomic_set(&ha->loop_down_timer, 0);
 652                 ha->flags.management_server_logged_in = 0;
 653
 654                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 655                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 656
 657                 /* Update AEN queue. */
 658                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
 659                 break;
 660
 661         /* case MBA_RIO_RESPONSE: */
 662         case MBA_ZIO_RESPONSE:
 663                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 664                     ha->host_no));
 665                 DEBUG(printk(KERN_INFO
 666                     "scsi(%ld): [R|Z]IO update completion.\n",
 667                     ha->host_no));
 668
 669                 qla2x00_process_response_queue(ha);
 670                 break;
 671         }
 672 }
 673
 674 /**
 675  * qla2x00_process_completed_request() - Process a Fast Post response.
 676  * @ha: SCSI driver HA context
 677  * @index: SRB index
 678  */
 679 static void
 680 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 681 {
 682         srb_t *sp;
 683
 684         /* Validate handle. */
 685         if (index >= MAX_OUTSTANDING_COMMANDS) {
 686                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 687                     ha->host_no, index));
 688                 qla_printk(KERN_WARNING, ha,
 689                     "Invalid SCSI completion handle %d.\n", index);
 690
 691                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 692                 return;
 693         }
 694
 695         sp = ha->outstanding_cmds[index];
 696         if (sp) {
 697                 /* Free outstanding command slot. */
 698                 ha->outstanding_cmds[index] = NULL;
 699
 700                 if (ha->actthreads)
 701                         ha->actthreads--;
 702                 sp->lun_queue->out_cnt--;
 703                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 704                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 705
 706                 /* Save ISP completion status */
 707                 sp->cmd->result = DID_OK << 16;
 708                 sp->fo_retry_cnt = 0;
 709                 add_to_done_queue(ha, sp);
 710         } else {
 711                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 712                     ha->host_no));
 713                 qla_printk(KERN_WARNING, ha,
 714                     "Invalid ISP SCSI completion handle\n");
 715
 716                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 717         }
 718 }
 719
 720 /**
 721  * qla2x00_process_response_queue() - Process response queue entries.
 722  * @ha: SCSI driver HA context
 723  */
 724 void
 725 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 726 {
 727         device_reg_t __iomem *reg = ha->iobase;
 728         sts_entry_t     *pkt;
 729         uint16_t        handle_cnt;
 730         uint16_t        cnt;
 731
 732         if (!ha->flags.online)
 733                 return;
 734
 735         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 736                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 737
 738                 ha->rsp_ring_index++;
 739                 if (ha->rsp_ring_index == ha->response_q_length) {
 740                         ha->rsp_ring_index = 0;
 741                         ha->response_ring_ptr = ha->response_ring;
 742                 } else {
 743                         ha->response_ring_ptr++;
 744                 }
 745
 746                 if (pkt->entry_status != 0) {
 747                         DEBUG3(printk(KERN_INFO
 748                             "scsi(%ld): Process error entry.\n", ha->host_no));
 749
 750                         qla2x00_error_entry(ha, pkt);
 751                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 752                         wmb();
 753                         continue;
 754                 }
 755
 756                 switch (pkt->entry_type) {
 757                 case STATUS_TYPE:
 758                         qla2x00_status_entry(ha, pkt);
 759                         break;
 760                 case STATUS_TYPE_21:
 761                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 762                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 763                                 qla2x00_process_completed_request(ha,
 764                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 765                         }
 766                         break;
 767                 case STATUS_TYPE_22:
 768                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 769                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 770                                 qla2x00_process_completed_request(ha,
 771                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 772                         }
 773                         break;
 774                 case STATUS_CONT_TYPE:
 775                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 776                         break;
 777                 case MS_IOCB_TYPE:
 778                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 779                         break;
 780                 case MBX_IOCB_TYPE:
 781                         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
 782                             !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
 783                                 if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
 784                                         qla2x00_process_iodesc(ha,
 785                                             (struct mbx_entry *)pkt);
 786                                 } else {
 787                                         /* MBX IOCB Type Not Supported. */
 788                                         DEBUG4(printk(KERN_WARNING
 789                                             "scsi(%ld): Received unknown MBX "
 790                                             "IOCB response pkt type=%x "
 791                                             "source=%x entry status=%x.\n",
 792                                             ha->host_no, pkt->entry_type,
 793                                             pkt->sys_define,
 794                                             pkt->entry_status));
 795                                 }
 796                                 break;
 797                         }
 798                         /* Fallthrough. */
 799                 default:
 800                         /* Type Not Supported. */
 801                         DEBUG4(printk(KERN_WARNING
 802                             "scsi(%ld): Received unknown response pkt type %x "
 803                             "entry status=%x.\n",
 804                             ha->host_no, pkt->entry_type, pkt->entry_status));
 805                         break;
 806                 }
 807                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 808                 wmb();
 809         }
 810
 811         /* Adjust ring index */
 812         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 813 }
 814
 815 /**
 816  * qla2x00_status_entry() - Process a Status IOCB entry.
 817  * @ha: SCSI driver HA context
 818  * @pkt: Entry pointer
 819  */
 820 static void
 821 qla2x00_status_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
 822 {
 823         int             ret;
 824         unsigned        b, t, l;
 825         srb_t           *sp;
 826         os_lun_t        *lq;
 827         os_tgt_t        *tq;
 828         fc_port_t       *fcport;
 829         struct scsi_cmnd *cp;
 830         uint16_t        comp_status;
 831         uint16_t        scsi_status;
 832         uint8_t         lscsi_status;
 833         int32_t         resid;
 834         uint8_t         sense_sz = 0;
 835         uint16_t        rsp_info_len;
 836
 837         /* Fast path completion. */
 838         if (le16_to_cpu(pkt->comp_status) == CS_COMPLETE &&
 839             (le16_to_cpu(pkt->scsi_status) & SS_MASK) == 0) {
 840                 qla2x00_process_completed_request(ha, pkt->handle);
 841
 842                 return;
 843         }
 844
 845         /* Validate handle. */
 846         if (pkt->handle < MAX_OUTSTANDING_COMMANDS) {
 847                 sp = ha->outstanding_cmds[pkt->handle];
 848                 ha->outstanding_cmds[pkt->handle] = NULL;
 849         } else
 850                 sp = NULL;
 851
 852         if (sp == NULL) {
 853                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 854                     ha->host_no));
 855                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 856
 857                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 858                 if (ha->dpc_wait && !ha->dpc_active)
 859                         up(ha->dpc_wait);
 860
 861                 return;
 862         }
 863         cp = sp->cmd;
 864         if (cp == NULL) {
 865                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 866                     "pkt->handle=%d sp=%p sp->state:%d\n",
 867                     ha->host_no, pkt->handle, sp, sp->state));
 868                 qla_printk(KERN_WARNING, ha,
 869                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 870
 871                 return;
 872         }
 873
 874         if (ha->actthreads)
 875                 ha->actthreads--;
 876
 877         if (sp->lun_queue == NULL) {
 878                 DEBUG2(printk("scsi(%ld): Status Entry invalid lun pointer.\n",
 879                     ha->host_no));
 880                 qla_printk(KERN_WARNING, ha,
 881                     "Status Entry invalid lun pointer.\n");
 882
 883                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 884                 if (ha->dpc_wait && !ha->dpc_active)
 885                         up(ha->dpc_wait);
 886
 887                 return;
 888         }
 889
 890         sp->lun_queue->out_cnt--;
 891
 892         comp_status = le16_to_cpu(pkt->comp_status);
 893         /* Mask of reserved bits 12-15, before we examine the scsi status */
 894         scsi_status = le16_to_cpu(pkt->scsi_status) & SS_MASK;
 895         lscsi_status = scsi_status & STATUS_MASK;
 896
 897         CMD_ENTRY_STATUS(cp) = pkt->entry_status;
 898         CMD_COMPL_STATUS(cp) = comp_status;
 899         CMD_SCSI_STATUS(cp) = scsi_status;
 900
 901         /* Generate LU queue on cntrl, target, LUN */
 902         b = cp->device->channel;
 903         t = cp->device->id;
 904         l = cp->device->lun,
 905
 906         tq = sp->tgt_queue;
 907         lq = sp->lun_queue;
 908
 909         /*
 910          * If loop is in transient state Report DID_BUS_BUSY
 911          */
 912         if ((comp_status != CS_COMPLETE || scsi_status != 0)) {
 913                 if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
 914                     (atomic_read(&ha->loop_down_timer) ||
 915                         atomic_read(&ha->loop_state) != LOOP_READY)) {
 916
 917                         DEBUG2(printk("scsi(%ld:%d:%d:%d): Loop Not Ready - "
 918                             "pid=%lx.\n",
 919                             ha->host_no, b, t, l, cp->serial_number));
 920
 921                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
 922                         add_to_retry_queue(ha, sp);
 923                         return;
 924                 }
 925         }
 926
 927         /* Check for any FCP transport errors. */
 928         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 929                 rsp_info_len = le16_to_cpu(pkt->rsp_info_len);
 930                 if (rsp_info_len > 3 && pkt->rsp_info[3]) {
 931                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 932                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 933                             "retrying command\n", ha->host_no, b, t, l,
 934                             rsp_info_len, pkt->rsp_info[0], pkt->rsp_info[1],
 935                             pkt->rsp_info[2], pkt->rsp_info[3],
 936                             pkt->rsp_info[4], pkt->rsp_info[5],
 937                             pkt->rsp_info[6], pkt->rsp_info[7]));
 938
 939                         cp->result = DID_BUS_BUSY << 16;
 940                         add_to_done_queue(ha, sp);
 941                         return;
 942                 }
 943         }
 944
 945         /*
 946          * Based on Host and scsi status generate status code for Linux
 947          */
 948         switch (comp_status) {
 949         case CS_COMPLETE:
 950                 if (scsi_status == 0) {
 951                         cp->result = DID_OK << 16;
 952                         break;
 953                 }
 954                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 955                         resid = le32_to_cpu(pkt->residual_length);
 956                         cp->resid = resid;
 957                         CMD_RESID_LEN(cp) = resid;
 958                 }
 959                 if (lscsi_status == SS_BUSY_CONDITION) {
 960                         cp->result = DID_BUS_BUSY << 16 | lscsi_status;
 961                         break;
 962                 }
 963
 964                 cp->result = DID_OK << 16 | lscsi_status;
 965
 966                 if (lscsi_status != SS_CHECK_CONDITION)
 967                         break;
 968
 969                 /*
 970                  * Copy Sense Data into sense buffer
 971                  */
 972                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 973
 974                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 975                         break;
 976
 977                 if (le16_to_cpu(pkt->req_sense_length) <
 978                     sizeof(cp->sense_buffer))
 979                         sense_sz = le16_to_cpu(pkt->req_sense_length);
 980                 else
 981                         sense_sz = sizeof(cp->sense_buffer);
 982
 983                 CMD_ACTUAL_SNSLEN(cp) = sense_sz;
 984                 sp->request_sense_length = sense_sz;
 985                 sp->request_sense_ptr = cp->sense_buffer;
 986
 987                 if (sp->request_sense_length > 32)
 988                         sense_sz = 32;
 989
 990                 memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);
 991
 992                 sp->request_sense_ptr += sense_sz;
 993                 sp->request_sense_length -= sense_sz;
 994                 if (sp->request_sense_length != 0)
 995                         ha->status_srb = sp;
 996
 997                 if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
 998                     qla2x00_check_sense(cp, lq) == QLA_SUCCESS) {
 999                         /* Throw away status_cont if any */
1000                         ha->status_srb = NULL;
1001                         add_to_scsi_retry_queue(ha, sp);
1002                         return;
1003                 }
1004
1005                 DEBUG5(printk("%s(): Check condition Sense data, "
1006                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1007                     __func__, ha->host_no, b, t, l, cp,
1008                     cp->serial_number));
1009                 if (sense_sz)
1010                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1011                             CMD_ACTUAL_SNSLEN(cp)));
1012                 break;
1013
1014         case CS_DATA_UNDERRUN:
1015                 DEBUG2(printk(KERN_INFO
1016                     "scsi(%ld:%d:%d) UNDERRUN status detected 0x%x-0x%x.\n",
1017                     ha->host_no, t, l, comp_status, scsi_status));
1018
1019                 resid = le32_to_cpu(pkt->residual_length);
1020                 if (scsi_status & SS_RESIDUAL_UNDER) {
1021                         cp->resid = resid;
1022                         CMD_RESID_LEN(cp) = resid;
1023                 }
1024
1025                 /*
1026                  * Check to see if SCSI Status is non zero. If so report SCSI
1027                  * Status.
1028                  */
1029                 if (lscsi_status != 0) {
1030                         if (lscsi_status == SS_BUSY_CONDITION) {
1031                                 cp->result = DID_BUS_BUSY << 16 |
1032                                     lscsi_status;
1033                                 break;
1034                         }
1035
1036                         cp->result = DID_OK << 16 | lscsi_status;
1037
1038                         if (lscsi_status != SS_CHECK_CONDITION)
1039                                 break;
1040
1041                         /* Copy Sense Data into sense buffer */
1042                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1043
1044                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1045                                 break;
1046
1047                         if (le16_to_cpu(pkt->req_sense_length) <
1048                             sizeof(cp->sense_buffer))
1049                                 sense_sz = le16_to_cpu(pkt->req_sense_length);
1050                         else
1051                                 sense_sz = sizeof(cp->sense_buffer);
1052
1053                         CMD_ACTUAL_SNSLEN(cp) = sense_sz;
1054                         sp->request_sense_length = sense_sz;
1055                         sp->request_sense_ptr = cp->sense_buffer;
1056
1057                         if (sp->request_sense_length > 32)
1058                                 sense_sz = 32;
1059
1060                         memcpy(cp->sense_buffer, pkt->req_sense_data, sense_sz);
1061
1062                         sp->request_sense_ptr += sense_sz;
1063                         sp->request_sense_length -= sense_sz;
1064                         if (sp->request_sense_length != 0)
1065                                 ha->status_srb = sp;
1066
1067                         if (!(sp->flags & (SRB_IOCTL | SRB_TAPE)) &&
1068                             (qla2x00_check_sense(cp, lq) == QLA_SUCCESS)) {
1069                                 ha->status_srb = NULL;
1070                                 add_to_scsi_retry_queue(ha, sp);
1071                                 return;
1072                         }
1073                         DEBUG5(printk("%s(): Check condition Sense data, "
1074                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1075                             __func__, ha->host_no, b, t, l, cp,
1076                             cp->serial_number));
1077                         if (sense_sz)
1078                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1079                                     CMD_ACTUAL_SNSLEN(cp)));
1080                 } else {
1081                         /*
1082                          * If RISC reports underrun and target does not report
1083                          * it then we must have a lost frame, so tell upper
1084                          * layer to retry it by reporting a bus busy.
1085                          */
1086                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1087                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1088                                     "frame(s) detected (%x of %x bytes)..."
1089                                     "retrying command.\n",
1090                                     ha->host_no, b, t, l, resid,
1091                                     cp->request_bufflen));
1092
1093                                 cp->result = DID_BUS_BUSY << 16;
1094                                 ha->dropped_frame_error_cnt++;
1095                                 break;
1096                         }
1097
1098                         /* Handle mid-layer underflow */
1099                         if ((unsigned)(cp->request_bufflen - resid) <
1100                             cp->underflow) {
1101                                 qla_printk(KERN_INFO, ha,
1102                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1103                                     "detected (%x of %x bytes)...returning "
1104                                     "error status.\n",
1105                                     ha->host_no, b, t, l, resid,
1106                                     cp->request_bufflen);
1107
1108                                 cp->result = DID_ERROR << 16;
1109                                 break;
1110                         }
1111
1112                         /* Everybody online, looking good... */
1113                         cp->result = DID_OK << 16;
1114                 }
1115                 break;
1116
1117         case CS_DATA_OVERRUN:
1118                 DEBUG2(printk(KERN_INFO
1119                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1120                     ha->host_no, t, l, comp_status, scsi_status));
1121                 DEBUG2(printk(KERN_INFO
1122                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1123                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1124                     cp->cmnd[4], cp->cmnd[5]));
1125                 DEBUG2(printk(KERN_INFO
1126                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1127                     "status!\n",
1128                     cp->serial_number, cp->request_bufflen,
1129                     le32_to_cpu(pkt->residual_length)));
1130
1131                 cp->result = DID_ERROR << 16;
1132                 break;
1133
1134         case CS_PORT_LOGGED_OUT:
1135         case CS_PORT_CONFIG_CHG:
1136         case CS_PORT_BUSY:
1137         case CS_INCOMPLETE:
1138         case CS_PORT_UNAVAILABLE:
1139                 /*
1140                  * If the port is in Target Down state, return all IOs for this
1141                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1142                  * retry_queue.
1143                  */
1144                 fcport = sp->fclun->fcport;
1145                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1146                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1147                     ha->host_no, t, l, cp->serial_number, comp_status,
1148                     atomic_read(&fcport->state)));
1149
1150                 if ((sp->flags & (SRB_IOCTL | SRB_TAPE)) ||
1151                     atomic_read(&fcport->state) == FCS_DEVICE_DEAD) {
1152                         cp->result = DID_NO_CONNECT << 16;
1153                         if (atomic_read(&ha->loop_state) == LOOP_DOWN)
1154                                 sp->err_id = SRB_ERR_LOOP;
1155                         else
1156                                 sp->err_id = SRB_ERR_PORT;
1157                         add_to_done_queue(ha, sp);
1158                 } else {
1159                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
1160                         add_to_retry_queue(ha, sp);
1161                 }
1162
1163                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1164                         qla2x00_mark_device_lost(ha, fcport, 1);
1165                 }
1166
1167                 return;
1168                 break;
1169
1170         case CS_RESET:
1171                 DEBUG2(printk(KERN_INFO
1172                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1173                     ha->host_no, comp_status, scsi_status));
1174
1175                 if (sp->flags & (SRB_IOCTL | SRB_TAPE)) {
1176                         cp->result = DID_RESET << 16;
1177                 } else {
1178                         qla2x00_extend_timeout(cp, EXTEND_CMD_TIMEOUT);
1179                         add_to_retry_queue(ha, sp);
1180                         return;
1181                 }
1182                 break;
1183
1184         case CS_ABORTED:
1185                 /*
1186                  * hv2.19.12 - DID_ABORT does not retry the request if we
1187                  * aborted this request then abort otherwise it must be a
1188                  * reset.
1189                  */
1190                 DEBUG2(printk(KERN_INFO
1191                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1192                     ha->host_no, comp_status, scsi_status));
1193
1194                 cp->result = DID_RESET << 16;
1195                 break;
1196
1197         case CS_TIMEOUT:
1198                 DEBUG2(printk(KERN_INFO
1199                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x.\n",
1200                     ha->host_no, b, t, l, comp_status, scsi_status));
1201
1202                 cp->result = DID_BUS_BUSY << 16;
1203
1204                 fcport = lq->fclun->fcport;
1205
1206                 /* Check to see if logout occurred */
1207                 if ((le16_to_cpu(pkt->status_flags) & SF_LOGOUT_SENT)) {
1208                         qla2x00_mark_device_lost(ha, fcport, 1);
1209                 }
1210                 break;
1211
1212         case CS_QUEUE_FULL:
1213                 DEBUG2(printk(KERN_INFO
1214                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1215                     ha->host_no, comp_status, scsi_status));
1216
1217                 /* SCSI Mid-Layer handles device queue full */
1218
1219                 cp->result = DID_OK << 16 | lscsi_status;
1220
1221                 /* TODO: ??? */
1222                 /* Adjust queue depth */
1223                 ret = scsi_track_queue_full(cp->device,
1224                     sp->lun_queue->out_cnt - 1);
1225                 if (ret) {
1226                         qla_printk(KERN_INFO, ha,
1227                             "scsi(%ld:%d:%d:%d): Queue depth adjusted to %d.\n",
1228                             ha->host_no, cp->device->channel, cp->device->id,
1229                             cp->device->lun, ret);
1230                 }
1231                 break;
1232
1233         default:
1234                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1235                     "0x%x-0x%x.\n",
1236                     ha->host_no, comp_status, scsi_status));
1237                 qla_printk(KERN_INFO, ha,
1238                     "Unknown status detected 0x%x-0x%x.\n",
1239                     comp_status, scsi_status);
1240
1241                 cp->result = DID_ERROR << 16;
1242                 break;
1243         }
1244
1245         /* Place command on done queue. */
1246         if (ha->status_srb == NULL)
1247                 add_to_done_queue(ha, sp);
1248 }
1249
1250 /**
1251  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1252  * @ha: SCSI driver HA context
1253  * @pkt: Entry pointer
1254  *
1255  * Extended sense data.
1256  */
1257 static void
1258 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1259 {
1260         uint8_t         sense_sz = 0;
1261         srb_t           *sp = ha->status_srb;
1262         struct scsi_cmnd *cp;
1263
1264         if (sp != NULL && sp->request_sense_length != 0) {
1265                 cp = sp->cmd;
1266                 if (cp == NULL) {
1267                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1268                             "sp=%p sp->state:%d\n", __func__, sp, sp->state));
1269                         qla_printk(KERN_INFO, ha,
1270                             "cmd is NULL: already returned to OS (sp=%p)\n",
1271                             sp);
1272
1273                         ha->status_srb = NULL;
1274                         return;
1275                 }
1276
1277                 if (sp->request_sense_length > sizeof(pkt->data)) {
1278                         sense_sz = sizeof(pkt->data);
1279                 } else {
1280                         sense_sz = sp->request_sense_length;
1281                 }
1282
1283                 /* Move sense data. */
1284                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1285                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1286
1287                 sp->request_sense_ptr += sense_sz;
1288                 sp->request_sense_length -= sense_sz;
1289
1290                 /* Place command on done queue. */
1291                 if (sp->request_sense_length == 0) {
1292                         add_to_done_queue(ha, sp);
1293                         ha->status_srb = NULL;
1294                 }
1295         }
1296 }
1297
1298 /**
1299  * qla2x00_error_entry() - Process an error entry.
1300  * @ha: SCSI driver HA context
1301  * @pkt: Entry pointer
1302  */
1303 static void
1304 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1305 {
1306         srb_t *sp;
1307
1308 #if defined(QL_DEBUG_LEVEL_2)
1309         if (pkt->entry_status & RF_INV_E_ORDER)
1310                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1311         else if (pkt->entry_status & RF_INV_E_COUNT)
1312                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1313         else if (pkt->entry_status & RF_INV_E_PARAM)
1314                 qla_printk(KERN_ERR, ha,
1315                     "%s: Invalid Entry Parameter\n", __func__);
1316         else if (pkt->entry_status & RF_INV_E_TYPE)
1317                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1318         else if (pkt->entry_status & RF_BUSY)
1319                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1320         else
1321                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1322 #endif
1323
1324         /* Validate handle. */
1325         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1326                 sp = ha->outstanding_cmds[pkt->handle];
1327         else
1328                 sp = NULL;
1329
1330         if (sp) {
1331                 /* Free outstanding command slot. */
1332                 ha->outstanding_cmds[pkt->handle] = NULL;
1333                 if (ha->actthreads)
1334                         ha->actthreads--;
1335                 sp->lun_queue->out_cnt--;
1336
1337                 /* Bad payload or header */
1338                 if (pkt->entry_status &
1339                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1340                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1341                         sp->cmd->result = DID_ERROR << 16;
1342                 } else if (pkt->entry_status & RF_BUSY) {
1343                         sp->cmd->result = DID_BUS_BUSY << 16;
1344                 } else {
1345                         sp->cmd->result = DID_ERROR << 16;
1346                 }
1347                 /* Place command on done queue. */
1348                 add_to_done_queue(ha, sp);
1349
1350         } else if (pkt->entry_type == COMMAND_A64_TYPE ||
1351             pkt->entry_type == COMMAND_TYPE) {
1352                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1353                     ha->host_no));
1354                 qla_printk(KERN_WARNING, ha,
1355                     "Error entry - invalid handle\n");
1356
1357                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1358                 if (ha->dpc_wait && !ha->dpc_active)
1359                         up(ha->dpc_wait);
1360         }
1361 }
1362
1363 /**
1364  * qla2x00_ms_entry() - Process a Management Server entry.
1365  * @ha: SCSI driver HA context
1366  * @index: Response queue out pointer
1367  */
1368 static void
1369 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1370 {
1371         srb_t          *sp;
1372
1373         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1374             __func__, ha->host_no, pkt, pkt->handle1));
1375
1376         /* Validate handle. */
1377         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1378                 sp = ha->outstanding_cmds[pkt->handle1];
1379         else
1380                 sp = NULL;
1381
1382         if (sp == NULL) {
1383                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1384                     ha->host_no));
1385                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1386
1387                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1388                 return;
1389         }
1390
1391         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1392         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1393
1394         /* Free outstanding command slot. */
1395         ha->outstanding_cmds[pkt->handle1] = NULL;
1396
1397         add_to_done_queue(ha, sp);
1398 }
1399
1400 /**
1401  * qla2x00_check_sense() - Perform any sense data interrogation.
1402  * @cp: SCSI Command
1403  * @lq: Lun queue
1404  *
1405  * Returns QLA_SUCCESS if the lun queue is suspended, else
1406  * QLA_FUNCTION_FAILED  (lun queue not suspended).
1407  */
1408 static int
1409 qla2x00_check_sense(struct scsi_cmnd *cp, os_lun_t *lq)
1410 {
1411         scsi_qla_host_t *ha;
1412         srb_t           *sp;
1413         fc_port_t       *fcport;
1414
1415         ha = (scsi_qla_host_t *) cp->device->host->hostdata;
1416         if ((cp->sense_buffer[0] & 0x70) != 0x70) {
1417                 return (QLA_FUNCTION_FAILED);
1418         }
1419
1420         sp = (srb_t * )CMD_SP(cp);
1421         sp->flags |= SRB_GOT_SENSE;
1422
1423         switch (cp->sense_buffer[2] & 0xf) {
1424         case RECOVERED_ERROR:
1425                 cp->result = DID_OK << 16;
1426                 cp->sense_buffer[0] = 0;
1427                 break;
1428
1429         case NOT_READY:
1430                 fcport = lq->fclun->fcport;
1431
1432                 /*
1433                  * Suspend the lun only for hard disk device type.
1434                  */
1435                 if ((fcport->flags & FCF_TAPE_PRESENT) == 0 &&
1436                     lq->q_state != LUN_STATE_TIMEOUT) {
1437                         /*
1438                          * If target is in process of being ready then suspend
1439                          * lun for 6 secs and retry all the commands.
1440                          */
1441                         if (cp->sense_buffer[12] == 0x4 &&
1442                             cp->sense_buffer[13] == 0x1) {
1443
1444                                 /* Suspend the lun for 6 secs */
1445                                 qla2x00_suspend_lun(ha, lq, 6,
1446                                     ql2xsuspendcount);
1447
1448                                 return (QLA_SUCCESS);
1449                         }
1450                 }
1451                 break;
1452         }
1453
1454         return (QLA_FUNCTION_FAILED);
1455 }