drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2005 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  10 static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
  11 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  12 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  13 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  14 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  15 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
  16
  17 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
  18
  19 /**
  20  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  21  * @irq:
  22  * @dev_id: SCSI driver HA context
  23  * @regs:
  24  *
  25  * Called by system whenever the host adapter generates an interrupt.
  26  *
  27  * Returns handled flag.
  28  */
  29 irqreturn_t
  30 qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
  31 {
  32         scsi_qla_host_t *ha;
  33         struct device_reg_2xxx __iomem *reg;
  34         int             status;
  35         unsigned long   flags;
  36         unsigned long   iter;
  37         uint16_t        mb[4];
  38
  39         ha = (scsi_qla_host_t *) dev_id;
  40         if (!ha) {
  41                 printk(KERN_INFO
  42                     "%s(): NULL host pointer\n", __func__);
  43                 return (IRQ_NONE);
  44         }
  45
  46         reg = &ha->iobase->isp;
  47         status = 0;
  48
  49         spin_lock_irqsave(&ha->hardware_lock, flags);
  50         for (iter = 50; iter--; ) {
  51                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  52                         break;
  53
  54                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  55                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  56                         RD_REG_WORD(&reg->hccr);
  57
  58                         /* Get mailbox data. */
  59                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  60                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  61                                 qla2x00_mbx_completion(ha, mb[0]);
  62                                 status |= MBX_INTERRUPT;
  63                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  64                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  65                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  66                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  67                                 qla2x00_async_event(ha, mb);
  68                         } else {
  69                                 /*EMPTY*/
  70                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  71                                     "interrupt type (%d).\n",
  72                                     ha->host_no, mb[0]));
  73                         }
  74                         /* Release mailbox registers. */
  75                         WRT_REG_WORD(&reg->semaphore, 0);
  76                         RD_REG_WORD(&reg->semaphore);
  77                 } else {
  78                         qla2x00_process_response_queue(ha);
  79
  80                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  81                         RD_REG_WORD(&reg->hccr);
  82                 }
  83         }
  84         spin_unlock_irqrestore(&ha->hardware_lock, flags);
  85
  86         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
  87             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
  88                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
  89
  90                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
  91                 up(&ha->mbx_intr_sem);
  92
  93                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
  94         }
  95
  96         return (IRQ_HANDLED);
  97 }
  98
  99 /**
 100  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 101  * @irq:
 102  * @dev_id: SCSI driver HA context
 103  * @regs:
 104  *
 105  * Called by system whenever the host adapter generates an interrupt.
 106  *
 107  * Returns handled flag.
 108  */
 109 irqreturn_t
 110 qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
 111 {
 112         scsi_qla_host_t *ha;
 113         struct device_reg_2xxx __iomem *reg;
 114         int             status;
 115         unsigned long   flags;
 116         unsigned long   iter;
 117         uint32_t        stat;
 118         uint16_t        hccr;
 119         uint16_t        mb[4];
 120
 121         ha = (scsi_qla_host_t *) dev_id;
 122         if (!ha) {
 123                 printk(KERN_INFO
 124                     "%s(): NULL host pointer\n", __func__);
 125                 return (IRQ_NONE);
 126         }
 127
 128         reg = &ha->iobase->isp;
 129         status = 0;
 130
 131         spin_lock_irqsave(&ha->hardware_lock, flags);
 132         for (iter = 50; iter--; ) {
 133                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 134                 if (stat & HSR_RISC_PAUSED) {
 135                         hccr = RD_REG_WORD(&reg->hccr);
 136                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 137                                 qla_printk(KERN_INFO, ha,
 138                                     "Parity error -- HCCR=%x.\n", hccr);
 139                         else
 140                                 qla_printk(KERN_INFO, ha,
 141                                     "RISC paused -- HCCR=%x.\n", hccr);
 142
 143                         /*
 144                          * Issue a "HARD" reset in order for the RISC
 145                          * interrupt bit to be cleared.  Schedule a big
 146                          * hammmer to get out of the RISC PAUSED state.
 147                          */
 148                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 149                         RD_REG_WORD(&reg->hccr);
 150                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 151                         break;
 152                 } else if ((stat & HSR_RISC_INT) == 0)
 153                         break;
 154
 155                 switch (stat & 0xff) {
 156                 case 0x1:
 157                 case 0x2:
 158                 case 0x10:
 159                 case 0x11:
 160                         qla2x00_mbx_completion(ha, MSW(stat));
 161                         status |= MBX_INTERRUPT;
 162
 163                         /* Release mailbox registers. */
 164                         WRT_REG_WORD(&reg->semaphore, 0);
 165                         break;
 166                 case 0x12:
 167                         mb[0] = MSW(stat);
 168                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 169                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 170                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 171                         qla2x00_async_event(ha, mb);
 172                         break;
 173                 case 0x13:
 174                         qla2x00_process_response_queue(ha);
 175                         break;
 176                 case 0x15:
 177                         mb[0] = MBA_CMPLT_1_16BIT;
 178                         mb[1] = MSW(stat);
 179                         qla2x00_async_event(ha, mb);
 180                         break;
 181                 case 0x16:
 182                         mb[0] = MBA_SCSI_COMPLETION;
 183                         mb[1] = MSW(stat);
 184                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 185                         qla2x00_async_event(ha, mb);
 186                         break;
 187                 default:
 188                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 189                             "(%d).\n",
 190                             ha->host_no, stat & 0xff));
 191                         break;
 192                 }
 193                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 194                 RD_REG_WORD_RELAXED(&reg->hccr);
 195         }
 196         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 197
 198         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 199             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 200                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
 201
 202                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 203                 up(&ha->mbx_intr_sem);
 204
 205                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
 206         }
 207
 208         return (IRQ_HANDLED);
 209 }
 210
 211 /**
 212  * qla2x00_mbx_completion() - Process mailbox command completions.
 213  * @ha: SCSI driver HA context
 214  * @mb0: Mailbox0 register
 215  */
 216 static void
 217 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 218 {
 219         uint16_t        cnt;
 220         uint16_t __iomem *wptr;
 221         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 222
 223         /* Load return mailbox registers. */
 224         ha->flags.mbox_int = 1;
 225         ha->mailbox_out[0] = mb0;
 226         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 227
 228         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 229                 if (IS_QLA2200(ha) && cnt == 8)
 230                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 231                 if (cnt == 4 || cnt == 5)
 232                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 233                 else
 234                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 235
 236                 wptr++;
 237         }
 238
 239         if (ha->mcp) {
 240                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 241                     __func__, ha->host_no, ha->mcp->mb[0]));
 242         } else {
 243                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 244                     __func__, ha->host_no));
 245         }
 246 }
 247
 248 /**
 249  * qla2x00_async_event() - Process aynchronous events.
 250  * @ha: SCSI driver HA context
 251  * @mb: Mailbox registers (0 - 3)
 252  */
 253 static void
 254 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 255 {
 256 #define LS_UNKNOWN      2
 257         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
 258         char            *link_speed;
 259         uint16_t        handle_cnt;
 260         uint16_t        cnt;
 261         uint32_t        handles[5];
 262         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 263         uint32_t        rscn_entry, host_pid;
 264         uint8_t         rscn_queue_index;
 265
 266         /* Setup to process RIO completion. */
 267         handle_cnt = 0;
 268         switch (mb[0]) {
 269         case MBA_SCSI_COMPLETION:
 270                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 271                 handle_cnt = 1;
 272                 break;
 273         case MBA_CMPLT_1_16BIT:
 274                 handles[0] = mb[1];
 275                 handle_cnt = 1;
 276                 mb[0] = MBA_SCSI_COMPLETION;
 277                 break;
 278         case MBA_CMPLT_2_16BIT:
 279                 handles[0] = mb[1];
 280                 handles[1] = mb[2];
 281                 handle_cnt = 2;
 282                 mb[0] = MBA_SCSI_COMPLETION;
 283                 break;
 284         case MBA_CMPLT_3_16BIT:
 285                 handles[0] = mb[1];
 286                 handles[1] = mb[2];
 287                 handles[2] = mb[3];
 288                 handle_cnt = 3;
 289                 mb[0] = MBA_SCSI_COMPLETION;
 290                 break;
 291         case MBA_CMPLT_4_16BIT:
 292                 handles[0] = mb[1];
 293                 handles[1] = mb[2];
 294                 handles[2] = mb[3];
 295                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 296                 handle_cnt = 4;
 297                 mb[0] = MBA_SCSI_COMPLETION;
 298                 break;
 299         case MBA_CMPLT_5_16BIT:
 300                 handles[0] = mb[1];
 301                 handles[1] = mb[2];
 302                 handles[2] = mb[3];
 303                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 304                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 305                 handle_cnt = 5;
 306                 mb[0] = MBA_SCSI_COMPLETION;
 307                 break;
 308         case MBA_CMPLT_2_32BIT:
 309                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 310                 handles[1] = le32_to_cpu(
 311                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 312                     RD_MAILBOX_REG(ha, reg, 6));
 313                 handle_cnt = 2;
 314                 mb[0] = MBA_SCSI_COMPLETION;
 315                 break;
 316         default:
 317                 break;
 318         }
 319
 320         switch (mb[0]) {
 321         case MBA_SCSI_COMPLETION:       /* Fast Post */
 322                 if (!ha->flags.online)
 323                         break;
 324
 325                 for (cnt = 0; cnt < handle_cnt; cnt++)
 326                         qla2x00_process_completed_request(ha, handles[cnt]);
 327                 break;
 328
 329         case MBA_RESET:                 /* Reset */
 330                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 331
 332                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 333                 break;
 334
 335         case MBA_SYSTEM_ERR:            /* System Error */
 336                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 337                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 338                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 339
 340                 qla_printk(KERN_INFO, ha,
 341                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 342                     mb[1], mb[2], mb[3]);
 343
 344                 ha->isp_ops.fw_dump(ha, 1);
 345
 346                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 347                         if (mb[1] == 0 && mb[2] == 0) {
 348                                 qla_printk(KERN_ERR, ha,
 349                                     "Unrecoverable Hardware Error: adapter "
 350                                     "marked OFFLINE!\n");
 351                                 ha->flags.online = 0;
 352                         } else
 353                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 354                 } else if (mb[1] == 0) {
 355                         qla_printk(KERN_INFO, ha,
 356                             "Unrecoverable Hardware Error: adapter marked "
 357                             "OFFLINE!\n");
 358                         ha->flags.online = 0;
 359                 } else
 360                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 361                 break;
 362
 363         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 364                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 365                     ha->host_no));
 366                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 367
 368                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 369                 break;
 370
 371         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 372                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 373                     ha->host_no));
 374                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 375
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 380                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 381                     ha->host_no));
 382                 break;
 383
 384         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 385                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
 386                     mb[1]));
 387                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
 388
 389                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 390                         atomic_set(&ha->loop_state, LOOP_DOWN);
 391                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 392                         qla2x00_mark_all_devices_lost(ha, 1);
 393                 }
 394
 395                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 396
 397                 ha->flags.management_server_logged_in = 0;
 398                 break;
 399
 400         case MBA_LOOP_UP:               /* Loop Up Event */
 401                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 402                         link_speed = link_speeds[0];
 403                         ha->link_data_rate = LDR_1GB;
 404                 } else {
 405                         link_speed = link_speeds[LS_UNKNOWN];
 406                         if (mb[1] < 5)
 407                                 link_speed = link_speeds[mb[1]];
 408                         ha->link_data_rate = mb[1];
 409                 }
 410
 411                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 412                     ha->host_no, link_speed));
 413                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 414                     link_speed);
 415
 416                 ha->flags.management_server_logged_in = 0;
 417                 break;
 418
 419         case MBA_LOOP_DOWN:             /* Loop Down Event */
 420                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
 421                     ha->host_no, mb[1]));
 422                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
 423
 424                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 425                         atomic_set(&ha->loop_state, LOOP_DOWN);
 426                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 427                         ha->device_flags |= DFLG_NO_CABLE;
 428                         qla2x00_mark_all_devices_lost(ha, 1);
 429                 }
 430
 431                 ha->flags.management_server_logged_in = 0;
 432                 ha->link_data_rate = LDR_UNKNOWN;
 433                 if (ql2xfdmienable)
 434                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 435                 break;
 436
 437         case MBA_LIP_RESET:             /* LIP reset occurred */
 438                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 439                     ha->host_no, mb[1]));
 440                 qla_printk(KERN_INFO, ha,
 441                     "LIP reset occured (%x).\n", mb[1]);
 442
 443                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 444                         atomic_set(&ha->loop_state, LOOP_DOWN);
 445                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 446                         qla2x00_mark_all_devices_lost(ha, 1);
 447                 }
 448
 449                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 450
 451                 ha->operating_mode = LOOP;
 452                 ha->flags.management_server_logged_in = 0;
 453                 break;
 454
 455         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 456                 if (IS_QLA2100(ha))
 457                         break;
 458
 459                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 460                     ha->host_no));
 461
 462                 /*
 463                  * Until there's a transition from loop down to loop up, treat
 464                  * this as loop down only.
 465                  */
 466                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 467                         atomic_set(&ha->loop_state, LOOP_DOWN);
 468                         if (!atomic_read(&ha->loop_down_timer))
 469                                 atomic_set(&ha->loop_down_timer,
 470                                     LOOP_DOWN_TIME);
 471                         qla2x00_mark_all_devices_lost(ha, 1);
 472                 }
 473
 474                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 475                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 476                 }
 477                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 478                 break;
 479
 480         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 481                 if (IS_QLA2100(ha))
 482                         break;
 483
 484                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 485                     "received.\n",
 486                     ha->host_no));
 487                 qla_printk(KERN_INFO, ha,
 488                     "Configuration change detected: value=%x.\n", mb[1]);
 489
 490                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 491                         atomic_set(&ha->loop_state, LOOP_DOWN);
 492                         if (!atomic_read(&ha->loop_down_timer))
 493                                 atomic_set(&ha->loop_down_timer,
 494                                     LOOP_DOWN_TIME);
 495                         qla2x00_mark_all_devices_lost(ha, 1);
 496                 }
 497
 498                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 499                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 500                 break;
 501
 502         case MBA_PORT_UPDATE:           /* Port database update */
 503                 /*
 504                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
 505                  * event etc. earlier indicating loop is down) then process
 506                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 507                  */
 508                 atomic_set(&ha->loop_down_timer, 0);
 509                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 510                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 511                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 512                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 513                             mb[2], mb[3]));
 514                         break;
 515                 }
 516
 517                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 518                     ha->host_no));
 519                 DEBUG(printk(KERN_INFO
 520                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 521                     ha->host_no, mb[1], mb[2], mb[3]));
 522
 523                 /*
 524                  * Mark all devices as missing so we will login again.
 525                  */
 526                 atomic_set(&ha->loop_state, LOOP_UP);
 527
 528                 qla2x00_mark_all_devices_lost(ha, 1);
 529
 530                 ha->flags.rscn_queue_overflow = 1;
 531
 532                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 533                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 534                 break;
 535
 536         case MBA_RSCN_UPDATE:           /* State Change Registration */
 537                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 538                     ha->host_no));
 539                 DEBUG(printk(KERN_INFO
 540                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
 541                     ha->host_no, mb[1], mb[2]));
 542
 543                 rscn_entry = (mb[1] << 16) | mb[2];
 544                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 545                     ha->d_id.b.al_pa;
 546                 if (rscn_entry == host_pid) {
 547                         DEBUG(printk(KERN_INFO
 548                             "scsi(%ld): Ignoring RSCN update to local host "
 549                             "port ID (%06x)\n",
 550                             ha->host_no, host_pid));
 551                         break;
 552                 }
 553
 554                 rscn_queue_index = ha->rscn_in_ptr + 1;
 555                 if (rscn_queue_index == MAX_RSCN_COUNT)
 556                         rscn_queue_index = 0;
 557                 if (rscn_queue_index != ha->rscn_out_ptr) {
 558                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 559                         ha->rscn_in_ptr = rscn_queue_index;
 560                 } else {
 561                         ha->flags.rscn_queue_overflow = 1;
 562                 }
 563
 564                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 565                 atomic_set(&ha->loop_down_timer, 0);
 566                 ha->flags.management_server_logged_in = 0;
 567
 568                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 569                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 570                 break;
 571
 572         /* case MBA_RIO_RESPONSE: */
 573         case MBA_ZIO_RESPONSE:
 574                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 575                     ha->host_no));
 576                 DEBUG(printk(KERN_INFO
 577                     "scsi(%ld): [R|Z]IO update completion.\n",
 578                     ha->host_no));
 579
 580                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 581                         qla24xx_process_response_queue(ha);
 582                 else
 583                         qla2x00_process_response_queue(ha);
 584                 break;
 585
 586         case MBA_DISCARD_RND_FRAME:
 587                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 588                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 589                 break;
 590
 591         case MBA_TRACE_NOTIFICATION:
 592                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 593                 ha->host_no, mb[1], mb[2]));
 594                 break;
 595         }
 596 }
 597
 598 /**
 599  * qla2x00_process_completed_request() - Process a Fast Post response.
 600  * @ha: SCSI driver HA context
 601  * @index: SRB index
 602  */
 603 static void
 604 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 605 {
 606         srb_t *sp;
 607
 608         /* Validate handle. */
 609         if (index >= MAX_OUTSTANDING_COMMANDS) {
 610                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 611                     ha->host_no, index));
 612                 qla_printk(KERN_WARNING, ha,
 613                     "Invalid SCSI completion handle %d.\n", index);
 614
 615                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 616                 return;
 617         }
 618
 619         sp = ha->outstanding_cmds[index];
 620         if (sp) {
 621                 /* Free outstanding command slot. */
 622                 ha->outstanding_cmds[index] = NULL;
 623
 624                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 625                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 626
 627                 /* Save ISP completion status */
 628                 sp->cmd->result = DID_OK << 16;
 629                 qla2x00_sp_compl(ha, sp);
 630         } else {
 631                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 632                     ha->host_no));
 633                 qla_printk(KERN_WARNING, ha,
 634                     "Invalid ISP SCSI completion handle\n");
 635
 636                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 637         }
 638 }
 639
 640 /**
 641  * qla2x00_process_response_queue() - Process response queue entries.
 642  * @ha: SCSI driver HA context
 643  */
 644 void
 645 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 646 {
 647         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 648         sts_entry_t     *pkt;
 649         uint16_t        handle_cnt;
 650         uint16_t        cnt;
 651
 652         if (!ha->flags.online)
 653                 return;
 654
 655         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 656                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 657
 658                 ha->rsp_ring_index++;
 659                 if (ha->rsp_ring_index == ha->response_q_length) {
 660                         ha->rsp_ring_index = 0;
 661                         ha->response_ring_ptr = ha->response_ring;
 662                 } else {
 663                         ha->response_ring_ptr++;
 664                 }
 665
 666                 if (pkt->entry_status != 0) {
 667                         DEBUG3(printk(KERN_INFO
 668                             "scsi(%ld): Process error entry.\n", ha->host_no));
 669
 670                         qla2x00_error_entry(ha, pkt);
 671                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 672                         wmb();
 673                         continue;
 674                 }
 675
 676                 switch (pkt->entry_type) {
 677                 case STATUS_TYPE:
 678                         qla2x00_status_entry(ha, pkt);
 679                         break;
 680                 case STATUS_TYPE_21:
 681                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 682                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 683                                 qla2x00_process_completed_request(ha,
 684                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 685                         }
 686                         break;
 687                 case STATUS_TYPE_22:
 688                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 689                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 690                                 qla2x00_process_completed_request(ha,
 691                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 692                         }
 693                         break;
 694                 case STATUS_CONT_TYPE:
 695                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 696                         break;
 697                 case MS_IOCB_TYPE:
 698                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
 699                         break;
 700                 default:
 701                         /* Type Not Supported. */
 702                         DEBUG4(printk(KERN_WARNING
 703                             "scsi(%ld): Received unknown response pkt type %x "
 704                             "entry status=%x.\n",
 705                             ha->host_no, pkt->entry_type, pkt->entry_status));
 706                         break;
 707                 }
 708                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 709                 wmb();
 710         }
 711
 712         /* Adjust ring index */
 713         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 714 }
 715
 716 /**
 717  * qla2x00_status_entry() - Process a Status IOCB entry.
 718  * @ha: SCSI driver HA context
 719  * @pkt: Entry pointer
 720  */
 721 static void
 722 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 723 {
 724         srb_t           *sp;
 725         fc_port_t       *fcport;
 726         struct scsi_cmnd *cp;
 727         sts_entry_t *sts;
 728         struct sts_entry_24xx *sts24;
 729         uint16_t        comp_status;
 730         uint16_t        scsi_status;
 731         uint8_t         lscsi_status;
 732         int32_t         resid;
 733         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 734         uint8_t         *rsp_info, *sense_data;
 735
 736         sts = (sts_entry_t *) pkt;
 737         sts24 = (struct sts_entry_24xx *) pkt;
 738         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 739                 comp_status = le16_to_cpu(sts24->comp_status);
 740                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 741         } else {
 742                 comp_status = le16_to_cpu(sts->comp_status);
 743                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 744         }
 745
 746         /* Fast path completion. */
 747         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 748                 qla2x00_process_completed_request(ha, sts->handle);
 749
 750                 return;
 751         }
 752
 753         /* Validate handle. */
 754         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 755                 sp = ha->outstanding_cmds[sts->handle];
 756                 ha->outstanding_cmds[sts->handle] = NULL;
 757         } else
 758                 sp = NULL;
 759
 760         if (sp == NULL) {
 761                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 762                     ha->host_no));
 763                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 764
 765                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 766                 qla2xxx_wake_dpc(ha);
 767                 return;
 768         }
 769         cp = sp->cmd;
 770         if (cp == NULL) {
 771                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 772                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 773                 qla_printk(KERN_WARNING, ha,
 774                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 775
 776                 return;
 777         }
 778
 779         lscsi_status = scsi_status & STATUS_MASK;
 780         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 781         CMD_COMPL_STATUS(cp) = comp_status;
 782         CMD_SCSI_STATUS(cp) = scsi_status;
 783
 784         fcport = sp->fcport;
 785
 786         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 787         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
 788                 sense_len = le32_to_cpu(sts24->sense_len);
 789                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 790                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 791                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 792                 rsp_info = sts24->data;
 793                 sense_data = sts24->data;
 794                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 795         } else {
 796                 sense_len = le16_to_cpu(sts->req_sense_length);
 797                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 798                 resid_len = le32_to_cpu(sts->residual_length);
 799                 rsp_info = sts->rsp_info;
 800                 sense_data = sts->req_sense_data;
 801         }
 802
 803         /* Check for any FCP transport errors. */
 804         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 805                 /* Sense data lies beyond any FCP RESPONSE data. */
 806                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 807                         sense_data += rsp_info_len;
 808                 if (rsp_info_len > 3 && rsp_info[3]) {
 809                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 810                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 811                             "retrying command\n", ha->host_no,
 812                             cp->device->channel, cp->device->id,
 813                             cp->device->lun, rsp_info_len, rsp_info[0],
 814                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 815                             rsp_info[5], rsp_info[6], rsp_info[7]));
 816
 817                         cp->result = DID_BUS_BUSY << 16;
 818                         qla2x00_sp_compl(ha, sp);
 819                         return;
 820                 }
 821         }
 822
 823         /*
 824          * Based on Host and scsi status generate status code for Linux
 825          */
 826         switch (comp_status) {
 827         case CS_COMPLETE:
 828                 if (scsi_status == 0) {
 829                         cp->result = DID_OK << 16;
 830                         break;
 831                 }
 832                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
 833                         resid = resid_len;
 834                         cp->resid = resid;
 835                         CMD_RESID_LEN(cp) = resid;
 836
 837                         if (!lscsi_status &&
 838                             ((unsigned)(cp->request_bufflen - resid) <
 839                              cp->underflow)) {
 840                                 qla_printk(KERN_INFO, ha,
 841                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 842                                     "detected (%x of %x bytes)...returning "
 843                                     "error status.\n", ha->host_no,
 844                                     cp->device->channel, cp->device->id,
 845                                     cp->device->lun, resid,
 846                                     cp->request_bufflen);
 847
 848                                 cp->result = DID_ERROR << 16;
 849                                 break;
 850                         }
 851                 }
 852                 cp->result = DID_OK << 16 | lscsi_status;
 853
 854                 if (lscsi_status != SS_CHECK_CONDITION)
 855                         break;
 856
 857                 /* Copy Sense Data into sense buffer. */
 858                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 859
 860                 if (!(scsi_status & SS_SENSE_LEN_VALID))
 861                         break;
 862
 863                 if (sense_len >= sizeof(cp->sense_buffer))
 864                         sense_len = sizeof(cp->sense_buffer);
 865
 866                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
 867                 sp->request_sense_length = sense_len;
 868                 sp->request_sense_ptr = cp->sense_buffer;
 869
 870                 if (sp->request_sense_length > 32)
 871                         sense_len = 32;
 872
 873                 memcpy(cp->sense_buffer, sense_data, sense_len);
 874
 875                 sp->request_sense_ptr += sense_len;
 876                 sp->request_sense_length -= sense_len;
 877                 if (sp->request_sense_length != 0)
 878                         ha->status_srb = sp;
 879
 880                 DEBUG5(printk("%s(): Check condition Sense data, "
 881                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
 882                     ha->host_no, cp->device->channel, cp->device->id,
 883                     cp->device->lun, cp, cp->serial_number));
 884                 if (sense_len)
 885                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 886                             CMD_ACTUAL_SNSLEN(cp)));
 887                 break;
 888
 889         case CS_DATA_UNDERRUN:
 890                 resid = resid_len;
 891                 /* Use F/W calculated residual length. */
 892                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
 893                         resid = fw_resid_len;
 894
 895                 if (scsi_status & SS_RESIDUAL_UNDER) {
 896                         cp->resid = resid;
 897                         CMD_RESID_LEN(cp) = resid;
 898                 } else {
 899                         DEBUG2(printk(KERN_INFO
 900                             "scsi(%ld:%d:%d) UNDERRUN status detected "
 901                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
 902                             "os_underflow=0x%x\n", ha->host_no,
 903                             cp->device->id, cp->device->lun, comp_status,
 904                             scsi_status, resid_len, resid, cp->cmnd[0],
 905                             cp->underflow));
 906
 907                 }
 908
 909                 /*
 910                  * Check to see if SCSI Status is non zero. If so report SCSI
 911                  * Status.
 912                  */
 913                 if (lscsi_status != 0) {
 914                         cp->result = DID_OK << 16 | lscsi_status;
 915
 916                         if (lscsi_status != SS_CHECK_CONDITION)
 917                                 break;
 918
 919                         /* Copy Sense Data into sense buffer */
 920                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
 921
 922                         if (!(scsi_status & SS_SENSE_LEN_VALID))
 923                                 break;
 924
 925                         if (sense_len >= sizeof(cp->sense_buffer))
 926                                 sense_len = sizeof(cp->sense_buffer);
 927
 928                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 929                         sp->request_sense_length = sense_len;
 930                         sp->request_sense_ptr = cp->sense_buffer;
 931
 932                         if (sp->request_sense_length > 32)
 933                                 sense_len = 32;
 934
 935                         memcpy(cp->sense_buffer, sense_data, sense_len);
 936
 937                         sp->request_sense_ptr += sense_len;
 938                         sp->request_sense_length -= sense_len;
 939                         if (sp->request_sense_length != 0)
 940                                 ha->status_srb = sp;
 941
 942                         DEBUG5(printk("%s(): Check condition Sense data, "
 943                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
 944                             __func__, ha->host_no, cp->device->channel,
 945                             cp->device->id, cp->device->lun, cp,
 946                             cp->serial_number));
 947
 948                         if (sense_len)
 949                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 950                                     CMD_ACTUAL_SNSLEN(cp)));
 951                 } else {
 952                         /*
 953                          * If RISC reports underrun and target does not report
 954                          * it then we must have a lost frame, so tell upper
 955                          * layer to retry it by reporting a bus busy.
 956                          */
 957                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
 958                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
 959                                     "frame(s) detected (%x of %x bytes)..."
 960                                     "retrying command.\n", ha->host_no,
 961                                     cp->device->channel, cp->device->id,
 962                                     cp->device->lun, resid,
 963                                     cp->request_bufflen));
 964
 965                                 cp->result = DID_BUS_BUSY << 16;
 966                                 break;
 967                         }
 968
 969                         /* Handle mid-layer underflow */
 970                         if ((unsigned)(cp->request_bufflen - resid) <
 971                             cp->underflow) {
 972                                 qla_printk(KERN_INFO, ha,
 973                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
 974                                     "detected (%x of %x bytes)...returning "
 975                                     "error status.\n", ha->host_no,
 976                                     cp->device->channel, cp->device->id,
 977                                     cp->device->lun, resid,
 978                                     cp->request_bufflen);
 979
 980                                 cp->result = DID_ERROR << 16;
 981                                 break;
 982                         }
 983
 984                         /* Everybody online, looking good... */
 985                         cp->result = DID_OK << 16;
 986                 }
 987                 break;
 988
 989         case CS_DATA_OVERRUN:
 990                 DEBUG2(printk(KERN_INFO
 991                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
 992                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
 993                     scsi_status));
 994                 DEBUG2(printk(KERN_INFO
 995                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
 996                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
 997                     cp->cmnd[4], cp->cmnd[5]));
 998                 DEBUG2(printk(KERN_INFO
 999                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1000                     "status!\n",
1001                     cp->serial_number, cp->request_bufflen, resid_len));
1002
1003                 cp->result = DID_ERROR << 16;
1004                 break;
1005
1006         case CS_PORT_LOGGED_OUT:
1007         case CS_PORT_CONFIG_CHG:
1008         case CS_PORT_BUSY:
1009         case CS_INCOMPLETE:
1010         case CS_PORT_UNAVAILABLE:
1011                 /*
1012                  * If the port is in Target Down state, return all IOs for this
1013                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1014                  * retry_queue.
1015                  */
1016                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1017                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1018                     ha->host_no, cp->device->id, cp->device->lun,
1019                     cp->serial_number, comp_status,
1020                     atomic_read(&fcport->state)));
1021
1022                 cp->result = DID_BUS_BUSY << 16;
1023                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1024                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1025                 }
1026                 break;
1027
1028         case CS_RESET:
1029                 DEBUG2(printk(KERN_INFO
1030                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1031                     ha->host_no, comp_status, scsi_status));
1032
1033                 cp->result = DID_RESET << 16;
1034                 break;
1035
1036         case CS_ABORTED:
1037                 /*
1038                  * hv2.19.12 - DID_ABORT does not retry the request if we
1039                  * aborted this request then abort otherwise it must be a
1040                  * reset.
1041                  */
1042                 DEBUG2(printk(KERN_INFO
1043                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1044                     ha->host_no, comp_status, scsi_status));
1045
1046                 cp->result = DID_RESET << 16;
1047                 break;
1048
1049         case CS_TIMEOUT:
1050                 cp->result = DID_BUS_BUSY << 16;
1051
1052                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1053                         DEBUG2(printk(KERN_INFO
1054                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1055                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1056                             cp->device->id, cp->device->lun, comp_status,
1057                             scsi_status));
1058                         break;
1059                 }
1060                 DEBUG2(printk(KERN_INFO
1061                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1062                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1063                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1064                     le16_to_cpu(sts->status_flags)));
1065
1066                 /* Check to see if logout occurred. */
1067                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1068                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1069                 break;
1070
1071         case CS_QUEUE_FULL:
1072                 DEBUG2(printk(KERN_INFO
1073                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1074                     ha->host_no, comp_status, scsi_status));
1075
1076                 /* SCSI Mid-Layer handles device queue full */
1077
1078                 cp->result = DID_OK << 16 | lscsi_status;
1079
1080                 break;
1081
1082         default:
1083                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1084                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1085                 qla_printk(KERN_INFO, ha,
1086                     "Unknown status detected 0x%x-0x%x.\n",
1087                     comp_status, scsi_status);
1088
1089                 cp->result = DID_ERROR << 16;
1090                 break;
1091         }
1092
1093         /* Place command on done queue. */
1094         if (ha->status_srb == NULL)
1095                 qla2x00_sp_compl(ha, sp);
1096 }
1097
1098 /**
1099  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1100  * @ha: SCSI driver HA context
1101  * @pkt: Entry pointer
1102  *
1103  * Extended sense data.
1104  */
1105 static void
1106 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1107 {
1108         uint8_t         sense_sz = 0;
1109         srb_t           *sp = ha->status_srb;
1110         struct scsi_cmnd *cp;
1111
1112         if (sp != NULL && sp->request_sense_length != 0) {
1113                 cp = sp->cmd;
1114                 if (cp == NULL) {
1115                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1116                             "sp=%p.\n", __func__, sp));
1117                         qla_printk(KERN_INFO, ha,
1118                             "cmd is NULL: already returned to OS (sp=%p)\n",
1119                             sp);
1120
1121                         ha->status_srb = NULL;
1122                         return;
1123                 }
1124
1125                 if (sp->request_sense_length > sizeof(pkt->data)) {
1126                         sense_sz = sizeof(pkt->data);
1127                 } else {
1128                         sense_sz = sp->request_sense_length;
1129                 }
1130
1131                 /* Move sense data. */
1132                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1133                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1134                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1135                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1136
1137                 sp->request_sense_ptr += sense_sz;
1138                 sp->request_sense_length -= sense_sz;
1139
1140                 /* Place command on done queue. */
1141                 if (sp->request_sense_length == 0) {
1142                         ha->status_srb = NULL;
1143                         qla2x00_sp_compl(ha, sp);
1144                 }
1145         }
1146 }
1147
1148 /**
1149  * qla2x00_error_entry() - Process an error entry.
1150  * @ha: SCSI driver HA context
1151  * @pkt: Entry pointer
1152  */
1153 static void
1154 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1155 {
1156         srb_t *sp;
1157
1158 #if defined(QL_DEBUG_LEVEL_2)
1159         if (pkt->entry_status & RF_INV_E_ORDER)
1160                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1161         else if (pkt->entry_status & RF_INV_E_COUNT)
1162                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1163         else if (pkt->entry_status & RF_INV_E_PARAM)
1164                 qla_printk(KERN_ERR, ha,
1165                     "%s: Invalid Entry Parameter\n", __func__);
1166         else if (pkt->entry_status & RF_INV_E_TYPE)
1167                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1168         else if (pkt->entry_status & RF_BUSY)
1169                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1170         else
1171                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1172 #endif
1173
1174         /* Validate handle. */
1175         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1176                 sp = ha->outstanding_cmds[pkt->handle];
1177         else
1178                 sp = NULL;
1179
1180         if (sp) {
1181                 /* Free outstanding command slot. */
1182                 ha->outstanding_cmds[pkt->handle] = NULL;
1183
1184                 /* Bad payload or header */
1185                 if (pkt->entry_status &
1186                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1187                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1188                         sp->cmd->result = DID_ERROR << 16;
1189                 } else if (pkt->entry_status & RF_BUSY) {
1190                         sp->cmd->result = DID_BUS_BUSY << 16;
1191                 } else {
1192                         sp->cmd->result = DID_ERROR << 16;
1193                 }
1194                 qla2x00_sp_compl(ha, sp);
1195
1196         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1197             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1198                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1199                     ha->host_no));
1200                 qla_printk(KERN_WARNING, ha,
1201                     "Error entry - invalid handle\n");
1202
1203                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1204                 qla2xxx_wake_dpc(ha);
1205         }
1206 }
1207
1208 /**
1209  * qla2x00_ms_entry() - Process a Management Server entry.
1210  * @ha: SCSI driver HA context
1211  * @index: Response queue out pointer
1212  */
1213 static void
1214 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1215 {
1216         srb_t          *sp;
1217
1218         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1219             __func__, ha->host_no, pkt, pkt->handle1));
1220
1221         /* Validate handle. */
1222         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1223                 sp = ha->outstanding_cmds[pkt->handle1];
1224         else
1225                 sp = NULL;
1226
1227         if (sp == NULL) {
1228                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1229                     ha->host_no));
1230                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1231
1232                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1233                 return;
1234         }
1235
1236         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1237         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1238
1239         /* Free outstanding command slot. */
1240         ha->outstanding_cmds[pkt->handle1] = NULL;
1241
1242         qla2x00_sp_compl(ha, sp);
1243 }
1244
1245
1246 /**
1247  * qla24xx_mbx_completion() - Process mailbox command completions.
1248  * @ha: SCSI driver HA context
1249  * @mb0: Mailbox0 register
1250  */
1251 static void
1252 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1253 {
1254         uint16_t        cnt;
1255         uint16_t __iomem *wptr;
1256         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1257
1258         /* Load return mailbox registers. */
1259         ha->flags.mbox_int = 1;
1260         ha->mailbox_out[0] = mb0;
1261         wptr = (uint16_t __iomem *)&reg->mailbox1;
1262
1263         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1264                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1265                 wptr++;
1266         }
1267
1268         if (ha->mcp) {
1269                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1270                     __func__, ha->host_no, ha->mcp->mb[0]));
1271         } else {
1272                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1273                     __func__, ha->host_no));
1274         }
1275 }
1276
1277 /**
1278  * qla24xx_process_response_queue() - Process response queue entries.
1279  * @ha: SCSI driver HA context
1280  */
1281 void
1282 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1283 {
1284         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1285         struct sts_entry_24xx *pkt;
1286
1287         if (!ha->flags.online)
1288                 return;
1289
1290         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1291                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1292
1293                 ha->rsp_ring_index++;
1294                 if (ha->rsp_ring_index == ha->response_q_length) {
1295                         ha->rsp_ring_index = 0;
1296                         ha->response_ring_ptr = ha->response_ring;
1297                 } else {
1298                         ha->response_ring_ptr++;
1299                 }
1300
1301                 if (pkt->entry_status != 0) {
1302                         DEBUG3(printk(KERN_INFO
1303                             "scsi(%ld): Process error entry.\n", ha->host_no));
1304
1305                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1306                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1307                         wmb();
1308                         continue;
1309                 }
1310
1311                 switch (pkt->entry_type) {
1312                 case STATUS_TYPE:
1313                         qla2x00_status_entry(ha, pkt);
1314                         break;
1315                 case STATUS_CONT_TYPE:
1316                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1317                         break;
1318                 case MS_IOCB_TYPE:
1319                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1320                         break;
1321                 default:
1322                         /* Type Not Supported. */
1323                         DEBUG4(printk(KERN_WARNING
1324                             "scsi(%ld): Received unknown response pkt type %x "
1325                             "entry status=%x.\n",
1326                             ha->host_no, pkt->entry_type, pkt->entry_status));
1327                         break;
1328                 }
1329                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1330                 wmb();
1331         }
1332
1333         /* Adjust ring index */
1334         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1335 }
1336
1337 /**
1338  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1339  * @irq:
1340  * @dev_id: SCSI driver HA context
1341  * @regs:
1342  *
1343  * Called by system whenever the host adapter generates an interrupt.
1344  *
1345  * Returns handled flag.
1346  */
1347 irqreturn_t
1348 qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
1349 {
1350         scsi_qla_host_t *ha;
1351         struct device_reg_24xx __iomem *reg;
1352         int             status;
1353         unsigned long   flags;
1354         unsigned long   iter;
1355         uint32_t        stat;
1356         uint32_t        hccr;
1357         uint16_t        mb[4];
1358
1359         ha = (scsi_qla_host_t *) dev_id;
1360         if (!ha) {
1361                 printk(KERN_INFO
1362                     "%s(): NULL host pointer\n", __func__);
1363                 return IRQ_NONE;
1364         }
1365
1366         reg = &ha->iobase->isp24;
1367         status = 0;
1368
1369         spin_lock_irqsave(&ha->hardware_lock, flags);
1370         for (iter = 50; iter--; ) {
1371                 stat = RD_REG_DWORD(&reg->host_status);
1372                 if (stat & HSRX_RISC_PAUSED) {
1373                         hccr = RD_REG_DWORD(&reg->hccr);
1374
1375                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1376                             "Dumping firmware!\n", hccr);
1377                         qla24xx_fw_dump(ha, 1);
1378
1379                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1380                         break;
1381                 } else if ((stat & HSRX_RISC_INT) == 0)
1382                         break;
1383
1384                 switch (stat & 0xff) {
1385                 case 0x1:
1386                 case 0x2:
1387                 case 0x10:
1388                 case 0x11:
1389                         qla24xx_mbx_completion(ha, MSW(stat));
1390                         status |= MBX_INTERRUPT;
1391
1392                         break;
1393                 case 0x12:
1394                         mb[0] = MSW(stat);
1395                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1396                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1397                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1398                         qla2x00_async_event(ha, mb);
1399                         break;
1400                 case 0x13:
1401                         qla24xx_process_response_queue(ha);
1402                         break;
1403                 default:
1404                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1405                             "(%d).\n",
1406                             ha->host_no, stat & 0xff));
1407                         break;
1408                 }
1409                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1410                 RD_REG_DWORD_RELAXED(&reg->hccr);
1411         }
1412         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1413
1414         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1415             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1416                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1417
1418                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1419                 up(&ha->mbx_intr_sem);
1420
1421                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1422         }
1423
1424         return IRQ_HANDLED;
1425 }
1426
1427 /**
1428  * qla24xx_ms_entry() - Process a Management Server entry.
1429  * @ha: SCSI driver HA context
1430  * @index: Response queue out pointer
1431  */
1432 static void
1433 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1434 {
1435         srb_t          *sp;
1436
1437         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1438             __func__, ha->host_no, pkt, pkt->handle));
1439
1440         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1441         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1442
1443         /* Validate handle. */
1444         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1445                 sp = ha->outstanding_cmds[pkt->handle];
1446         else
1447                 sp = NULL;
1448
1449         if (sp == NULL) {
1450                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1451                     ha->host_no));
1452                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1453                     ha->host_no));
1454                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1455                     pkt->handle);
1456
1457                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1458                 return;
1459         }
1460
1461         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1462         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1463
1464         /* Free outstanding command slot. */
1465         ha->outstanding_cmds[pkt->handle] = NULL;
1466
1467         qla2x00_sp_compl(ha, sp);
1468 }
1469