git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla2xxx/qla_isr.c

   1 /*
   2  * QLogic Fibre Channel HBA Driver
   3  * Copyright (c)  2003-2008 QLogic Corporation
   4  *
   5  * See LICENSE.qla2xxx for copyright and licensing details.
   6  */
   7 #include "qla_def.h"
   8
   9 #include <linux/delay.h>
  10 #include <scsi/scsi_tcq.h>
  11
  12 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
  13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
  14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
  15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
  16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
  17
  18 /**
  19  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
  20  * @irq:
  21  * @dev_id: SCSI driver HA context
  22  *
  23  * Called by system whenever the host adapter generates an interrupt.
  24  *
  25  * Returns handled flag.
  26  */
  27 irqreturn_t
  28 qla2100_intr_handler(int irq, void *dev_id)
  29 {
  30         scsi_qla_host_t *ha;
  31         struct device_reg_2xxx __iomem *reg;
  32         int             status;
  33         unsigned long   iter;
  34         uint16_t        hccr;
  35         uint16_t        mb[4];
  36
  37         ha = (scsi_qla_host_t *) dev_id;
  38         if (!ha) {
  39                 printk(KERN_INFO
  40                     "%s(): NULL host pointer\n", __func__);
  41                 return (IRQ_NONE);
  42         }
  43
  44         reg = &ha->iobase->isp;
  45         status = 0;
  46
  47         spin_lock(&ha->hardware_lock);
  48         for (iter = 50; iter--; ) {
  49                 hccr = RD_REG_WORD(&reg->hccr);
  50                 if (hccr & HCCR_RISC_PAUSE) {
  51                         if (pci_channel_offline(ha->pdev))
  52                                 break;
  53
  54                         /*
  55                          * Issue a "HARD" reset in order for the RISC interrupt
  56                          * bit to be cleared.  Schedule a big hammmer to get
  57                          * out of the RISC PAUSED state.
  58                          */
  59                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
  60                         RD_REG_WORD(&reg->hccr);
  61
  62                         ha->isp_ops->fw_dump(ha, 1);
  63                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
  64                         break;
  65                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
  66                         break;
  67
  68                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
  69                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  70                         RD_REG_WORD(&reg->hccr);
  71
  72                         /* Get mailbox data. */
  73                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
  74                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
  75                                 qla2x00_mbx_completion(ha, mb[0]);
  76                                 status |= MBX_INTERRUPT;
  77                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
  78                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
  79                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
  80                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
  81                                 qla2x00_async_event(ha, mb);
  82                         } else {
  83                                 /*EMPTY*/
  84                                 DEBUG2(printk("scsi(%ld): Unrecognized "
  85                                     "interrupt type (%d).\n",
  86                                     ha->host_no, mb[0]));
  87                         }
  88                         /* Release mailbox registers. */
  89                         WRT_REG_WORD(&reg->semaphore, 0);
  90                         RD_REG_WORD(&reg->semaphore);
  91                 } else {
  92                         qla2x00_process_response_queue(ha);
  93
  94                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
  95                         RD_REG_WORD(&reg->hccr);
  96                 }
  97         }
  98         spin_unlock(&ha->hardware_lock);
  99
 100         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 101             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 102                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 103                 complete(&ha->mbx_intr_comp);
 104         }
 105
 106         return (IRQ_HANDLED);
 107 }
 108
 109 /**
 110  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
 111  * @irq:
 112  * @dev_id: SCSI driver HA context
 113  *
 114  * Called by system whenever the host adapter generates an interrupt.
 115  *
 116  * Returns handled flag.
 117  */
 118 irqreturn_t
 119 qla2300_intr_handler(int irq, void *dev_id)
 120 {
 121         scsi_qla_host_t *ha;
 122         struct device_reg_2xxx __iomem *reg;
 123         int             status;
 124         unsigned long   iter;
 125         uint32_t        stat;
 126         uint16_t        hccr;
 127         uint16_t        mb[4];
 128
 129         ha = (scsi_qla_host_t *) dev_id;
 130         if (!ha) {
 131                 printk(KERN_INFO
 132                     "%s(): NULL host pointer\n", __func__);
 133                 return (IRQ_NONE);
 134         }
 135
 136         reg = &ha->iobase->isp;
 137         status = 0;
 138
 139         spin_lock(&ha->hardware_lock);
 140         for (iter = 50; iter--; ) {
 141                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
 142                 if (stat & HSR_RISC_PAUSED) {
 143                         if (pci_channel_offline(ha->pdev))
 144                                 break;
 145
 146                         hccr = RD_REG_WORD(&reg->hccr);
 147                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
 148                                 qla_printk(KERN_INFO, ha, "Parity error -- "
 149                                     "HCCR=%x, Dumping firmware!\n", hccr);
 150                         else
 151                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
 152                                     "HCCR=%x, Dumping firmware!\n", hccr);
 153
 154                         /*
 155                          * Issue a "HARD" reset in order for the RISC
 156                          * interrupt bit to be cleared.  Schedule a big
 157                          * hammmer to get out of the RISC PAUSED state.
 158                          */
 159                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
 160                         RD_REG_WORD(&reg->hccr);
 161
 162                         ha->isp_ops->fw_dump(ha, 1);
 163                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 164                         break;
 165                 } else if ((stat & HSR_RISC_INT) == 0)
 166                         break;
 167
 168                 switch (stat & 0xff) {
 169                 case 0x1:
 170                 case 0x2:
 171                 case 0x10:
 172                 case 0x11:
 173                         qla2x00_mbx_completion(ha, MSW(stat));
 174                         status |= MBX_INTERRUPT;
 175
 176                         /* Release mailbox registers. */
 177                         WRT_REG_WORD(&reg->semaphore, 0);
 178                         break;
 179                 case 0x12:
 180                         mb[0] = MSW(stat);
 181                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
 182                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 183                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
 184                         qla2x00_async_event(ha, mb);
 185                         break;
 186                 case 0x13:
 187                         qla2x00_process_response_queue(ha);
 188                         break;
 189                 case 0x15:
 190                         mb[0] = MBA_CMPLT_1_16BIT;
 191                         mb[1] = MSW(stat);
 192                         qla2x00_async_event(ha, mb);
 193                         break;
 194                 case 0x16:
 195                         mb[0] = MBA_SCSI_COMPLETION;
 196                         mb[1] = MSW(stat);
 197                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
 198                         qla2x00_async_event(ha, mb);
 199                         break;
 200                 default:
 201                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
 202                             "(%d).\n",
 203                             ha->host_no, stat & 0xff));
 204                         break;
 205                 }
 206                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
 207                 RD_REG_WORD_RELAXED(&reg->hccr);
 208         }
 209         spin_unlock(&ha->hardware_lock);
 210
 211         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
 212             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
 213                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
 214                 complete(&ha->mbx_intr_comp);
 215         }
 216
 217         return (IRQ_HANDLED);
 218 }
 219
 220 /**
 221  * qla2x00_mbx_completion() - Process mailbox command completions.
 222  * @ha: SCSI driver HA context
 223  * @mb0: Mailbox0 register
 224  */
 225 static void
 226 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
 227 {
 228         uint16_t        cnt;
 229         uint16_t __iomem *wptr;
 230         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 231
 232         /* Load return mailbox registers. */
 233         ha->flags.mbox_int = 1;
 234         ha->mailbox_out[0] = mb0;
 235         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
 236
 237         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
 238                 if (IS_QLA2200(ha) && cnt == 8)
 239                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
 240                 if (cnt == 4 || cnt == 5)
 241                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
 242                 else
 243                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
 244
 245                 wptr++;
 246         }
 247
 248         if (ha->mcp) {
 249                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
 250                     __func__, ha->host_no, ha->mcp->mb[0]));
 251         } else {
 252                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
 253                     __func__, ha->host_no));
 254         }
 255 }
 256
 257 /**
 258  * qla2x00_async_event() - Process aynchronous events.
 259  * @ha: SCSI driver HA context
 260  * @mb: Mailbox registers (0 - 3)
 261  */
 262 void
 263 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
 264 {
 265 #define LS_UNKNOWN      2
 266         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
 267         char            *link_speed;
 268         uint16_t        handle_cnt;
 269         uint16_t        cnt;
 270         uint32_t        handles[5];
 271         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 272         uint32_t        rscn_entry, host_pid;
 273         uint8_t         rscn_queue_index;
 274         unsigned long   flags;
 275
 276         /* Setup to process RIO completion. */
 277         handle_cnt = 0;
 278         switch (mb[0]) {
 279         case MBA_SCSI_COMPLETION:
 280                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 281                 handle_cnt = 1;
 282                 break;
 283         case MBA_CMPLT_1_16BIT:
 284                 handles[0] = mb[1];
 285                 handle_cnt = 1;
 286                 mb[0] = MBA_SCSI_COMPLETION;
 287                 break;
 288         case MBA_CMPLT_2_16BIT:
 289                 handles[0] = mb[1];
 290                 handles[1] = mb[2];
 291                 handle_cnt = 2;
 292                 mb[0] = MBA_SCSI_COMPLETION;
 293                 break;
 294         case MBA_CMPLT_3_16BIT:
 295                 handles[0] = mb[1];
 296                 handles[1] = mb[2];
 297                 handles[2] = mb[3];
 298                 handle_cnt = 3;
 299                 mb[0] = MBA_SCSI_COMPLETION;
 300                 break;
 301         case MBA_CMPLT_4_16BIT:
 302                 handles[0] = mb[1];
 303                 handles[1] = mb[2];
 304                 handles[2] = mb[3];
 305                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 306                 handle_cnt = 4;
 307                 mb[0] = MBA_SCSI_COMPLETION;
 308                 break;
 309         case MBA_CMPLT_5_16BIT:
 310                 handles[0] = mb[1];
 311                 handles[1] = mb[2];
 312                 handles[2] = mb[3];
 313                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
 314                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
 315                 handle_cnt = 5;
 316                 mb[0] = MBA_SCSI_COMPLETION;
 317                 break;
 318         case MBA_CMPLT_2_32BIT:
 319                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
 320                 handles[1] = le32_to_cpu(
 321                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
 322                     RD_MAILBOX_REG(ha, reg, 6));
 323                 handle_cnt = 2;
 324                 mb[0] = MBA_SCSI_COMPLETION;
 325                 break;
 326         default:
 327                 break;
 328         }
 329
 330         switch (mb[0]) {
 331         case MBA_SCSI_COMPLETION:       /* Fast Post */
 332                 if (!ha->flags.online)
 333                         break;
 334
 335                 for (cnt = 0; cnt < handle_cnt; cnt++)
 336                         qla2x00_process_completed_request(ha, handles[cnt]);
 337                 break;
 338
 339         case MBA_RESET:                 /* Reset */
 340                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
 341
 342                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 343                 break;
 344
 345         case MBA_SYSTEM_ERR:            /* System Error */
 346                 qla_printk(KERN_INFO, ha,
 347                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
 348                     mb[1], mb[2], mb[3]);
 349
 350                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 351                 ha->isp_ops->fw_dump(ha, 1);
 352
 353                 if (IS_FWI2_CAPABLE(ha)) {
 354                         if (mb[1] == 0 && mb[2] == 0) {
 355                                 qla_printk(KERN_ERR, ha,
 356                                     "Unrecoverable Hardware Error: adapter "
 357                                     "marked OFFLINE!\n");
 358                                 ha->flags.online = 0;
 359                         } else
 360                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 361                 } else if (mb[1] == 0) {
 362                         qla_printk(KERN_INFO, ha,
 363                             "Unrecoverable Hardware Error: adapter marked "
 364                             "OFFLINE!\n");
 365                         ha->flags.online = 0;
 366                 } else
 367                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 368                 break;
 369
 370         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
 371                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
 372                     ha->host_no));
 373                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
 374
 375                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 377                 break;
 378
 379         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
 380                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
 381                     ha->host_no));
 382                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
 383
 384                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
 385                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 386                 break;
 387
 388         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
 389                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
 390                     ha->host_no));
 391                 break;
 392
 393         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
 394                 DEBUG2(printk("scsi(%ld): LIP occurred (%x).\n", ha->host_no,
 395                     mb[1]));
 396                 qla_printk(KERN_INFO, ha, "LIP occurred (%x).\n", mb[1]);
 397
 398                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 399                         atomic_set(&ha->loop_state, LOOP_DOWN);
 400                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 401                         qla2x00_mark_all_devices_lost(ha, 1);
 402                 }
 403
 404                 if (ha->parent) {
 405                         atomic_set(&ha->vp_state, VP_FAILED);
 406                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 407                 }
 408
 409                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 410                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 411
 412                 ha->flags.management_server_logged_in = 0;
 413                 qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
 414                 break;
 415
 416         case MBA_LOOP_UP:               /* Loop Up Event */
 417                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
 418                         link_speed = link_speeds[0];
 419                         ha->link_data_rate = PORT_SPEED_1GB;
 420                 } else {
 421                         link_speed = link_speeds[LS_UNKNOWN];
 422                         if (mb[1] < 5)
 423                                 link_speed = link_speeds[mb[1]];
 424                         ha->link_data_rate = mb[1];
 425                 }
 426
 427                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
 428                     ha->host_no, link_speed));
 429                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
 430                     link_speed);
 431
 432                 ha->flags.management_server_logged_in = 0;
 433                 qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
 434                 break;
 435
 436         case MBA_LOOP_DOWN:             /* Loop Down Event */
 437                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
 438                     "(%x %x %x).\n", ha->host_no, mb[1], mb[2], mb[3]));
 439                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
 440                     mb[1], mb[2], mb[3]);
 441
 442                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 443                         atomic_set(&ha->loop_state, LOOP_DOWN);
 444                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 445                         ha->device_flags |= DFLG_NO_CABLE;
 446                         qla2x00_mark_all_devices_lost(ha, 1);
 447                 }
 448
 449                 if (ha->parent) {
 450                         atomic_set(&ha->vp_state, VP_FAILED);
 451                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 452                 }
 453
 454                 ha->flags.management_server_logged_in = 0;
 455                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
 456                 qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
 457                 break;
 458
 459         case MBA_LIP_RESET:             /* LIP reset occurred */
 460                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
 461                     ha->host_no, mb[1]));
 462                 qla_printk(KERN_INFO, ha,
 463                     "LIP reset occurred (%x).\n", mb[1]);
 464
 465                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 466                         atomic_set(&ha->loop_state, LOOP_DOWN);
 467                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
 468                         qla2x00_mark_all_devices_lost(ha, 1);
 469                 }
 470
 471                 if (ha->parent) {
 472                         atomic_set(&ha->vp_state, VP_FAILED);
 473                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 474                 }
 475
 476                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 477
 478                 ha->operating_mode = LOOP;
 479                 ha->flags.management_server_logged_in = 0;
 480                 qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
 481                 break;
 482
 483         case MBA_POINT_TO_POINT:        /* Point-to-Point */
 484                 if (IS_QLA2100(ha))
 485                         break;
 486
 487                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
 488                     ha->host_no));
 489
 490                 /*
 491                  * Until there's a transition from loop down to loop up, treat
 492                  * this as loop down only.
 493                  */
 494                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 495                         atomic_set(&ha->loop_state, LOOP_DOWN);
 496                         if (!atomic_read(&ha->loop_down_timer))
 497                                 atomic_set(&ha->loop_down_timer,
 498                                     LOOP_DOWN_TIME);
 499                         qla2x00_mark_all_devices_lost(ha, 1);
 500                 }
 501
 502                 if (ha->parent) {
 503                         atomic_set(&ha->vp_state, VP_FAILED);
 504                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 505                 }
 506
 507                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
 508                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
 509                 }
 510                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
 511                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
 512
 513                 ha->flags.gpsc_supported = 1;
 514                 ha->flags.management_server_logged_in = 0;
 515                 break;
 516
 517         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
 518                 if (IS_QLA2100(ha))
 519                         break;
 520
 521                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
 522                     "received.\n",
 523                     ha->host_no));
 524                 qla_printk(KERN_INFO, ha,
 525                     "Configuration change detected: value=%x.\n", mb[1]);
 526
 527                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
 528                         atomic_set(&ha->loop_state, LOOP_DOWN);
 529                         if (!atomic_read(&ha->loop_down_timer))
 530                                 atomic_set(&ha->loop_down_timer,
 531                                     LOOP_DOWN_TIME);
 532                         qla2x00_mark_all_devices_lost(ha, 1);
 533                 }
 534
 535                 if (ha->parent) {
 536                         atomic_set(&ha->vp_state, VP_FAILED);
 537                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
 538                 }
 539
 540                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 541                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 542                 break;
 543
 544         case MBA_PORT_UPDATE:           /* Port database update */
 545                 /*
 546                  * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
 547                  * event etc. earlier indicating loop is down) then process
 548                  * it.  Otherwise ignore it and Wait for RSCN to come in.
 549                  */
 550                 atomic_set(&ha->loop_down_timer, 0);
 551                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
 552                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
 553                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
 554                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
 555                             mb[2], mb[3]));
 556                         break;
 557                 }
 558
 559                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
 560                     ha->host_no));
 561                 DEBUG(printk(KERN_INFO
 562                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
 563                     ha->host_no, mb[1], mb[2], mb[3]));
 564
 565                 /*
 566                  * Mark all devices as missing so we will login again.
 567                  */
 568                 atomic_set(&ha->loop_state, LOOP_UP);
 569
 570                 qla2x00_mark_all_devices_lost(ha, 1);
 571
 572                 ha->flags.rscn_queue_overflow = 1;
 573
 574                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 575                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
 576                 break;
 577
 578         case MBA_RSCN_UPDATE:           /* State Change Registration */
 579                 /* Check if the Vport has issued a SCR */
 580                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
 581                         break;
 582                 /* Only handle SCNs for our Vport index. */
 583                 if (ha->parent && ha->vp_idx != (mb[3] & 0xff))
 584                         break;
 585
 586                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
 587                     ha->host_no));
 588                 DEBUG(printk(KERN_INFO
 589                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
 590                     ha->host_no, mb[1], mb[2], mb[3]));
 591
 592                 rscn_entry = (mb[1] << 16) | mb[2];
 593                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
 594                     ha->d_id.b.al_pa;
 595                 if (rscn_entry == host_pid) {
 596                         DEBUG(printk(KERN_INFO
 597                             "scsi(%ld): Ignoring RSCN update to local host "
 598                             "port ID (%06x)\n",
 599                             ha->host_no, host_pid));
 600                         break;
 601                 }
 602
 603                 rscn_queue_index = ha->rscn_in_ptr + 1;
 604                 if (rscn_queue_index == MAX_RSCN_COUNT)
 605                         rscn_queue_index = 0;
 606                 if (rscn_queue_index != ha->rscn_out_ptr) {
 607                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
 608                         ha->rscn_in_ptr = rscn_queue_index;
 609                 } else {
 610                         ha->flags.rscn_queue_overflow = 1;
 611                 }
 612
 613                 atomic_set(&ha->loop_state, LOOP_UPDATE);
 614                 atomic_set(&ha->loop_down_timer, 0);
 615                 ha->flags.management_server_logged_in = 0;
 616
 617                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
 618                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
 619                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
 620                 break;
 621
 622         /* case MBA_RIO_RESPONSE: */
 623         case MBA_ZIO_RESPONSE:
 624                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
 625                     ha->host_no));
 626                 DEBUG(printk(KERN_INFO
 627                     "scsi(%ld): [R|Z]IO update completion.\n",
 628                     ha->host_no));
 629
 630                 if (IS_FWI2_CAPABLE(ha))
 631                         qla24xx_process_response_queue(ha);
 632                 else
 633                         qla2x00_process_response_queue(ha);
 634                 break;
 635
 636         case MBA_DISCARD_RND_FRAME:
 637                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
 638                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
 639                 break;
 640
 641         case MBA_TRACE_NOTIFICATION:
 642                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
 643                 ha->host_no, mb[1], mb[2]));
 644                 break;
 645
 646         case MBA_ISP84XX_ALERT:
 647                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
 648                     "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));
 649
 650                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
 651                 switch (mb[1]) {
 652                 case A84_PANIC_RECOVERY:
 653                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
 654                             "%04x %04x\n", mb[2], mb[3]);
 655                         break;
 656                 case A84_OP_LOGIN_COMPLETE:
 657                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
 658                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 659                             "firmware version %x\n", ha->cs84xx->op_fw_version));
 660                         break;
 661                 case A84_DIAG_LOGIN_COMPLETE:
 662                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 663                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
 664                             "diagnostic firmware version %x\n",
 665                             ha->cs84xx->diag_fw_version));
 666                         break;
 667                 case A84_GOLD_LOGIN_COMPLETE:
 668                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
 669                         ha->cs84xx->fw_update = 1;
 670                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
 671                             "firmware version %x\n",
 672                             ha->cs84xx->gold_fw_version));
 673                         break;
 674                 default:
 675                         qla_printk(KERN_ERR, ha,
 676                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
 677                             mb[1], mb[2], mb[3]);
 678                 }
 679                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
 680                 break;
 681         }
 682
 683         if (!ha->parent && ha->num_vhosts)
 684                 qla2x00_alert_all_vps(ha, mb);
 685 }
 686
 687 static void
 688 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
 689 {
 690         fc_port_t *fcport = data;
 691
 692         if (fcport->ha->max_q_depth <= sdev->queue_depth)
 693                 return;
 694
 695         if (sdev->ordered_tags)
 696                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
 697                     sdev->queue_depth + 1);
 698         else
 699                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
 700                     sdev->queue_depth + 1);
 701
 702         fcport->last_ramp_up = jiffies;
 703
 704         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 705             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
 706             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 707             sdev->queue_depth));
 708 }
 709
 710 static void
 711 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
 712 {
 713         fc_port_t *fcport = data;
 714
 715         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
 716                 return;
 717
 718         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
 719             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
 720             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
 721             sdev->queue_depth));
 722 }
 723
 724 static inline void
 725 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
 726 {
 727         fc_port_t *fcport;
 728         struct scsi_device *sdev;
 729
 730         sdev = sp->cmd->device;
 731         if (sdev->queue_depth >= ha->max_q_depth)
 732                 return;
 733
 734         fcport = sp->fcport;
 735         if (time_before(jiffies,
 736             fcport->last_ramp_up + ql2xqfullrampup * HZ))
 737                 return;
 738         if (time_before(jiffies,
 739             fcport->last_queue_full + ql2xqfullrampup * HZ))
 740                 return;
 741
 742         starget_for_each_device(sdev->sdev_target, fcport,
 743             qla2x00_adjust_sdev_qdepth_up);
 744 }
 745
 746 /**
 747  * qla2x00_process_completed_request() - Process a Fast Post response.
 748  * @ha: SCSI driver HA context
 749  * @index: SRB index
 750  */
 751 static void
 752 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
 753 {
 754         srb_t *sp;
 755
 756         /* Validate handle. */
 757         if (index >= MAX_OUTSTANDING_COMMANDS) {
 758                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
 759                     ha->host_no, index));
 760                 qla_printk(KERN_WARNING, ha,
 761                     "Invalid SCSI completion handle %d.\n", index);
 762
 763                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 764                 return;
 765         }
 766
 767         sp = ha->outstanding_cmds[index];
 768         if (sp) {
 769                 /* Free outstanding command slot. */
 770                 ha->outstanding_cmds[index] = NULL;
 771
 772                 CMD_COMPL_STATUS(sp->cmd) = 0L;
 773                 CMD_SCSI_STATUS(sp->cmd) = 0L;
 774
 775                 /* Save ISP completion status */
 776                 sp->cmd->result = DID_OK << 16;
 777
 778                 qla2x00_ramp_up_queue_depth(ha, sp);
 779                 qla2x00_sp_compl(ha, sp);
 780         } else {
 781                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
 782                     ha->host_no));
 783                 qla_printk(KERN_WARNING, ha,
 784                     "Invalid ISP SCSI completion handle\n");
 785
 786                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 787         }
 788 }
 789
 790 /**
 791  * qla2x00_process_response_queue() - Process response queue entries.
 792  * @ha: SCSI driver HA context
 793  */
 794 void
 795 qla2x00_process_response_queue(struct scsi_qla_host *ha)
 796 {
 797         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
 798         sts_entry_t     *pkt;
 799         uint16_t        handle_cnt;
 800         uint16_t        cnt;
 801
 802         if (!ha->flags.online)
 803                 return;
 804
 805         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 806                 pkt = (sts_entry_t *)ha->response_ring_ptr;
 807
 808                 ha->rsp_ring_index++;
 809                 if (ha->rsp_ring_index == ha->response_q_length) {
 810                         ha->rsp_ring_index = 0;
 811                         ha->response_ring_ptr = ha->response_ring;
 812                 } else {
 813                         ha->response_ring_ptr++;
 814                 }
 815
 816                 if (pkt->entry_status != 0) {
 817                         DEBUG3(printk(KERN_INFO
 818                             "scsi(%ld): Process error entry.\n", ha->host_no));
 819
 820                         qla2x00_error_entry(ha, pkt);
 821                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 822                         wmb();
 823                         continue;
 824                 }
 825
 826                 switch (pkt->entry_type) {
 827                 case STATUS_TYPE:
 828                         qla2x00_status_entry(ha, pkt);
 829                         break;
 830                 case STATUS_TYPE_21:
 831                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
 832                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 833                                 qla2x00_process_completed_request(ha,
 834                                     ((sts21_entry_t *)pkt)->handle[cnt]);
 835                         }
 836                         break;
 837                 case STATUS_TYPE_22:
 838                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
 839                         for (cnt = 0; cnt < handle_cnt; cnt++) {
 840                                 qla2x00_process_completed_request(ha,
 841                                     ((sts22_entry_t *)pkt)->handle[cnt]);
 842                         }
 843                         break;
 844                 case STATUS_CONT_TYPE:
 845                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
 846                         break;
 847                 default:
 848                         /* Type Not Supported. */
 849                         DEBUG4(printk(KERN_WARNING
 850                             "scsi(%ld): Received unknown response pkt type %x "
 851                             "entry status=%x.\n",
 852                             ha->host_no, pkt->entry_type, pkt->entry_status));
 853                         break;
 854                 }
 855                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
 856                 wmb();
 857         }
 858
 859         /* Adjust ring index */
 860         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
 861 }
 862
 863 static inline void
 864 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
 865 {
 866         struct scsi_cmnd *cp = sp->cmd;
 867
 868         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
 869                 sense_len = SCSI_SENSE_BUFFERSIZE;
 870
 871         CMD_ACTUAL_SNSLEN(cp) = sense_len;
 872         sp->request_sense_length = sense_len;
 873         sp->request_sense_ptr = cp->sense_buffer;
 874         if (sp->request_sense_length > 32)
 875                 sense_len = 32;
 876
 877         memcpy(cp->sense_buffer, sense_data, sense_len);
 878
 879         sp->request_sense_ptr += sense_len;
 880         sp->request_sense_length -= sense_len;
 881         if (sp->request_sense_length != 0)
 882                 sp->fcport->ha->status_srb = sp;
 883
 884         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
 885             "cmd=%p pid=%ld\n", __func__, sp->fcport->ha->host_no,
 886             cp->device->channel, cp->device->id, cp->device->lun, cp,
 887             cp->serial_number));
 888         if (sense_len)
 889                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 890                     CMD_ACTUAL_SNSLEN(cp)));
 891 }
 892
 893 /**
 894  * qla2x00_status_entry() - Process a Status IOCB entry.
 895  * @ha: SCSI driver HA context
 896  * @pkt: Entry pointer
 897  */
 898 static void
 899 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 900 {
 901         srb_t           *sp;
 902         fc_port_t       *fcport;
 903         struct scsi_cmnd *cp;
 904         sts_entry_t *sts;
 905         struct sts_entry_24xx *sts24;
 906         uint16_t        comp_status;
 907         uint16_t        scsi_status;
 908         uint8_t         lscsi_status;
 909         int32_t         resid;
 910         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 911         uint8_t         *rsp_info, *sense_data;
 912
 913         sts = (sts_entry_t *) pkt;
 914         sts24 = (struct sts_entry_24xx *) pkt;
 915         if (IS_FWI2_CAPABLE(ha)) {
 916                 comp_status = le16_to_cpu(sts24->comp_status);
 917                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 918         } else {
 919                 comp_status = le16_to_cpu(sts->comp_status);
 920                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 921         }
 922
 923         /* Fast path completion. */
 924         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 925                 qla2x00_process_completed_request(ha, sts->handle);
 926
 927                 return;
 928         }
 929
 930         /* Validate handle. */
 931         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 932                 sp = ha->outstanding_cmds[sts->handle];
 933                 ha->outstanding_cmds[sts->handle] = NULL;
 934         } else
 935                 sp = NULL;
 936
 937         if (sp == NULL) {
 938                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 939                     ha->host_no));
 940                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 941
 942                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 943                 qla2xxx_wake_dpc(ha);
 944                 return;
 945         }
 946         cp = sp->cmd;
 947         if (cp == NULL) {
 948                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 949                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 950                 qla_printk(KERN_WARNING, ha,
 951                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 952
 953                 return;
 954         }
 955
 956         lscsi_status = scsi_status & STATUS_MASK;
 957         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 958         CMD_COMPL_STATUS(cp) = comp_status;
 959         CMD_SCSI_STATUS(cp) = scsi_status;
 960
 961         fcport = sp->fcport;
 962
 963         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 964         if (IS_FWI2_CAPABLE(ha)) {
 965                 sense_len = le32_to_cpu(sts24->sense_len);
 966                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 967                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 968                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 969                 rsp_info = sts24->data;
 970                 sense_data = sts24->data;
 971                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 972         } else {
 973                 sense_len = le16_to_cpu(sts->req_sense_length);
 974                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 975                 resid_len = le32_to_cpu(sts->residual_length);
 976                 rsp_info = sts->rsp_info;
 977                 sense_data = sts->req_sense_data;
 978         }
 979
 980         /* Check for any FCP transport errors. */
 981         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 982                 /* Sense data lies beyond any FCP RESPONSE data. */
 983                 if (IS_FWI2_CAPABLE(ha))
 984                         sense_data += rsp_info_len;
 985                 if (rsp_info_len > 3 && rsp_info[3]) {
 986                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 987                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 988                             "retrying command\n", ha->host_no,
 989                             cp->device->channel, cp->device->id,
 990                             cp->device->lun, rsp_info_len, rsp_info[0],
 991                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 992                             rsp_info[5], rsp_info[6], rsp_info[7]));
 993
 994                         cp->result = DID_BUS_BUSY << 16;
 995                         qla2x00_sp_compl(ha, sp);
 996                         return;
 997                 }
 998         }
 999
1000         /* Check for overrun. */
1001         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1002             scsi_status & SS_RESIDUAL_OVER)
1003                 comp_status = CS_DATA_OVERRUN;
1004
1005         /*
1006          * Based on Host and scsi status generate status code for Linux
1007          */
1008         switch (comp_status) {
1009         case CS_COMPLETE:
1010         case CS_QUEUE_FULL:
1011                 if (scsi_status == 0) {
1012                         cp->result = DID_OK << 16;
1013                         break;
1014                 }
1015                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1016                         resid = resid_len;
1017                         scsi_set_resid(cp, resid);
1018                         CMD_RESID_LEN(cp) = resid;
1019
1020                         if (!lscsi_status &&
1021                             ((unsigned)(scsi_bufflen(cp) - resid) <
1022                              cp->underflow)) {
1023                                 qla_printk(KERN_INFO, ha,
1024                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1025                                            "detected (%x of %x bytes)...returning "
1026                                            "error status.\n", ha->host_no,
1027                                            cp->device->channel, cp->device->id,
1028                                            cp->device->lun, resid,
1029                                            scsi_bufflen(cp));
1030
1031                                 cp->result = DID_ERROR << 16;
1032                                 break;
1033                         }
1034                 }
1035                 cp->result = DID_OK << 16 | lscsi_status;
1036
1037                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1038                         DEBUG2(printk(KERN_INFO
1039                             "scsi(%ld): QUEUE FULL status detected "
1040                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1041                             scsi_status));
1042
1043                         /* Adjust queue depth for all luns on the port. */
1044                         fcport->last_queue_full = jiffies;
1045                         starget_for_each_device(cp->device->sdev_target,
1046                             fcport, qla2x00_adjust_sdev_qdepth_down);
1047                         break;
1048                 }
1049                 if (lscsi_status != SS_CHECK_CONDITION)
1050                         break;
1051
1052                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1053                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1054                         break;
1055
1056                 qla2x00_handle_sense(sp, sense_data, sense_len);
1057                 break;
1058
1059         case CS_DATA_UNDERRUN:
1060                 resid = resid_len;
1061                 /* Use F/W calculated residual length. */
1062                 if (IS_FWI2_CAPABLE(ha)) {
1063                         if (scsi_status & SS_RESIDUAL_UNDER &&
1064                             resid != fw_resid_len) {
1065                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1066                                 lscsi_status = 0;
1067                         }
1068                         resid = fw_resid_len;
1069                 }
1070
1071                 if (scsi_status & SS_RESIDUAL_UNDER) {
1072                         scsi_set_resid(cp, resid);
1073                         CMD_RESID_LEN(cp) = resid;
1074                 } else {
1075                         DEBUG2(printk(KERN_INFO
1076                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1077                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1078                             "os_underflow=0x%x\n", ha->host_no,
1079                             cp->device->id, cp->device->lun, comp_status,
1080                             scsi_status, resid_len, resid, cp->cmnd[0],
1081                             cp->underflow));
1082
1083                 }
1084
1085                 /*
1086                  * Check to see if SCSI Status is non zero. If so report SCSI
1087                  * Status.
1088                  */
1089                 if (lscsi_status != 0) {
1090                         cp->result = DID_OK << 16 | lscsi_status;
1091
1092                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1093                                 DEBUG2(printk(KERN_INFO
1094                                     "scsi(%ld): QUEUE FULL status detected "
1095                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1096                                     scsi_status));
1097
1098                                 /*
1099                                  * Adjust queue depth for all luns on the
1100                                  * port.
1101                                  */
1102                                 fcport->last_queue_full = jiffies;
1103                                 starget_for_each_device(
1104                                     cp->device->sdev_target, fcport,
1105                                     qla2x00_adjust_sdev_qdepth_down);
1106                                 break;
1107                         }
1108                         if (lscsi_status != SS_CHECK_CONDITION)
1109                                 break;
1110
1111                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1112                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1113                                 break;
1114
1115                         qla2x00_handle_sense(sp, sense_data, sense_len);
1116                 } else {
1117                         /*
1118                          * If RISC reports underrun and target does not report
1119                          * it then we must have a lost frame, so tell upper
1120                          * layer to retry it by reporting a bus busy.
1121                          */
1122                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1123                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1124                                               "frame(s) detected (%x of %x bytes)..."
1125                                               "retrying command.\n", ha->host_no,
1126                                               cp->device->channel, cp->device->id,
1127                                               cp->device->lun, resid,
1128                                               scsi_bufflen(cp)));
1129
1130                                 cp->result = DID_BUS_BUSY << 16;
1131                                 break;
1132                         }
1133
1134                         /* Handle mid-layer underflow */
1135                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1136                             cp->underflow) {
1137                                 qla_printk(KERN_INFO, ha,
1138                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1139                                            "detected (%x of %x bytes)...returning "
1140                                            "error status.\n", ha->host_no,
1141                                            cp->device->channel, cp->device->id,
1142                                            cp->device->lun, resid,
1143                                            scsi_bufflen(cp));
1144
1145                                 cp->result = DID_ERROR << 16;
1146                                 break;
1147                         }
1148
1149                         /* Everybody online, looking good... */
1150                         cp->result = DID_OK << 16;
1151                 }
1152                 break;
1153
1154         case CS_DATA_OVERRUN:
1155                 DEBUG2(printk(KERN_INFO
1156                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1157                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1158                     scsi_status));
1159                 DEBUG2(printk(KERN_INFO
1160                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1161                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1162                     cp->cmnd[4], cp->cmnd[5]));
1163                 DEBUG2(printk(KERN_INFO
1164                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1165                     "status!\n",
1166                     cp->serial_number, scsi_bufflen(cp), resid_len));
1167
1168                 cp->result = DID_ERROR << 16;
1169                 break;
1170
1171         case CS_PORT_LOGGED_OUT:
1172         case CS_PORT_CONFIG_CHG:
1173         case CS_PORT_BUSY:
1174         case CS_INCOMPLETE:
1175         case CS_PORT_UNAVAILABLE:
1176                 /*
1177                  * If the port is in Target Down state, return all IOs for this
1178                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1179                  * retry_queue.
1180                  */
1181                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1182                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1183                     ha->host_no, cp->device->id, cp->device->lun,
1184                     cp->serial_number, comp_status,
1185                     atomic_read(&fcport->state)));
1186
1187                 cp->result = DID_BUS_BUSY << 16;
1188                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1189                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1190                 break;
1191
1192         case CS_RESET:
1193                 DEBUG2(printk(KERN_INFO
1194                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1195                     ha->host_no, comp_status, scsi_status));
1196
1197                 cp->result = DID_RESET << 16;
1198                 break;
1199
1200         case CS_ABORTED:
1201                 /*
1202                  * hv2.19.12 - DID_ABORT does not retry the request if we
1203                  * aborted this request then abort otherwise it must be a
1204                  * reset.
1205                  */
1206                 DEBUG2(printk(KERN_INFO
1207                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1208                     ha->host_no, comp_status, scsi_status));
1209
1210                 cp->result = DID_RESET << 16;
1211                 break;
1212
1213         case CS_TIMEOUT:
1214                 cp->result = DID_BUS_BUSY << 16;
1215
1216                 if (IS_FWI2_CAPABLE(ha)) {
1217                         DEBUG2(printk(KERN_INFO
1218                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1219                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1220                             cp->device->id, cp->device->lun, comp_status,
1221                             scsi_status));
1222                         break;
1223                 }
1224                 DEBUG2(printk(KERN_INFO
1225                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1226                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1227                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1228                     le16_to_cpu(sts->status_flags)));
1229
1230                 /* Check to see if logout occurred. */
1231                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1232                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1233                 break;
1234
1235         default:
1236                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1237                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1238                 qla_printk(KERN_INFO, ha,
1239                     "Unknown status detected 0x%x-0x%x.\n",
1240                     comp_status, scsi_status);
1241
1242                 cp->result = DID_ERROR << 16;
1243                 break;
1244         }
1245
1246         /* Place command on done queue. */
1247         if (ha->status_srb == NULL)
1248                 qla2x00_sp_compl(ha, sp);
1249 }
1250
1251 /**
1252  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1253  * @ha: SCSI driver HA context
1254  * @pkt: Entry pointer
1255  *
1256  * Extended sense data.
1257  */
1258 static void
1259 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1260 {
1261         uint8_t         sense_sz = 0;
1262         srb_t           *sp = ha->status_srb;
1263         struct scsi_cmnd *cp;
1264
1265         if (sp != NULL && sp->request_sense_length != 0) {
1266                 cp = sp->cmd;
1267                 if (cp == NULL) {
1268                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1269                             "sp=%p.\n", __func__, sp));
1270                         qla_printk(KERN_INFO, ha,
1271                             "cmd is NULL: already returned to OS (sp=%p)\n",
1272                             sp);
1273
1274                         ha->status_srb = NULL;
1275                         return;
1276                 }
1277
1278                 if (sp->request_sense_length > sizeof(pkt->data)) {
1279                         sense_sz = sizeof(pkt->data);
1280                 } else {
1281                         sense_sz = sp->request_sense_length;
1282                 }
1283
1284                 /* Move sense data. */
1285                 if (IS_FWI2_CAPABLE(ha))
1286                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1287                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1288                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1289
1290                 sp->request_sense_ptr += sense_sz;
1291                 sp->request_sense_length -= sense_sz;
1292
1293                 /* Place command on done queue. */
1294                 if (sp->request_sense_length == 0) {
1295                         ha->status_srb = NULL;
1296                         qla2x00_sp_compl(ha, sp);
1297                 }
1298         }
1299 }
1300
1301 /**
1302  * qla2x00_error_entry() - Process an error entry.
1303  * @ha: SCSI driver HA context
1304  * @pkt: Entry pointer
1305  */
1306 static void
1307 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1308 {
1309         srb_t *sp;
1310
1311 #if defined(QL_DEBUG_LEVEL_2)
1312         if (pkt->entry_status & RF_INV_E_ORDER)
1313                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1314         else if (pkt->entry_status & RF_INV_E_COUNT)
1315                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1316         else if (pkt->entry_status & RF_INV_E_PARAM)
1317                 qla_printk(KERN_ERR, ha,
1318                     "%s: Invalid Entry Parameter\n", __func__);
1319         else if (pkt->entry_status & RF_INV_E_TYPE)
1320                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1321         else if (pkt->entry_status & RF_BUSY)
1322                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1323         else
1324                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1325 #endif
1326
1327         /* Validate handle. */
1328         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1329                 sp = ha->outstanding_cmds[pkt->handle];
1330         else
1331                 sp = NULL;
1332
1333         if (sp) {
1334                 /* Free outstanding command slot. */
1335                 ha->outstanding_cmds[pkt->handle] = NULL;
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                 qla2x00_sp_compl(ha, sp);
1348
1349         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1350             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1351                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1352                     ha->host_no));
1353                 qla_printk(KERN_WARNING, ha,
1354                     "Error entry - invalid handle\n");
1355
1356                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1357                 qla2xxx_wake_dpc(ha);
1358         }
1359 }
1360
1361 /**
1362  * qla24xx_mbx_completion() - Process mailbox command completions.
1363  * @ha: SCSI driver HA context
1364  * @mb0: Mailbox0 register
1365  */
1366 static void
1367 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1368 {
1369         uint16_t        cnt;
1370         uint16_t __iomem *wptr;
1371         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1372
1373         /* Load return mailbox registers. */
1374         ha->flags.mbox_int = 1;
1375         ha->mailbox_out[0] = mb0;
1376         wptr = (uint16_t __iomem *)&reg->mailbox1;
1377
1378         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1379                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1380                 wptr++;
1381         }
1382
1383         if (ha->mcp) {
1384                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1385                     __func__, ha->host_no, ha->mcp->mb[0]));
1386         } else {
1387                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1388                     __func__, ha->host_no));
1389         }
1390 }
1391
1392 /**
1393  * qla24xx_process_response_queue() - Process response queue entries.
1394  * @ha: SCSI driver HA context
1395  */
1396 void
1397 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1398 {
1399         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1400         struct sts_entry_24xx *pkt;
1401
1402         if (!ha->flags.online)
1403                 return;
1404
1405         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1406                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1407
1408                 ha->rsp_ring_index++;
1409                 if (ha->rsp_ring_index == ha->response_q_length) {
1410                         ha->rsp_ring_index = 0;
1411                         ha->response_ring_ptr = ha->response_ring;
1412                 } else {
1413                         ha->response_ring_ptr++;
1414                 }
1415
1416                 if (pkt->entry_status != 0) {
1417                         DEBUG3(printk(KERN_INFO
1418                             "scsi(%ld): Process error entry.\n", ha->host_no));
1419
1420                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1421                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1422                         wmb();
1423                         continue;
1424                 }
1425
1426                 switch (pkt->entry_type) {
1427                 case STATUS_TYPE:
1428                         qla2x00_status_entry(ha, pkt);
1429                         break;
1430                 case STATUS_CONT_TYPE:
1431                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1432                         break;
1433                 case VP_RPT_ID_IOCB_TYPE:
1434                         qla24xx_report_id_acquisition(ha,
1435                             (struct vp_rpt_id_entry_24xx *)pkt);
1436                         break;
1437                 default:
1438                         /* Type Not Supported. */
1439                         DEBUG4(printk(KERN_WARNING
1440                             "scsi(%ld): Received unknown response pkt type %x "
1441                             "entry status=%x.\n",
1442                             ha->host_no, pkt->entry_type, pkt->entry_status));
1443                         break;
1444                 }
1445                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1446                 wmb();
1447         }
1448
1449         /* Adjust ring index */
1450         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1451 }
1452
1453 static void
1454 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1455 {
1456         int rval;
1457         uint32_t cnt;
1458         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1459
1460         if (!IS_QLA25XX(ha))
1461                 return;
1462
1463         rval = QLA_SUCCESS;
1464         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1465         RD_REG_DWORD(&reg->iobase_addr);
1466         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1467         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1468             rval == QLA_SUCCESS; cnt--) {
1469                 if (cnt) {
1470                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1471                         udelay(10);
1472                 } else
1473                         rval = QLA_FUNCTION_TIMEOUT;
1474         }
1475         if (rval == QLA_SUCCESS)
1476                 goto next_test;
1477
1478         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1479         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1480             rval == QLA_SUCCESS; cnt--) {
1481                 if (cnt) {
1482                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1483                         udelay(10);
1484                 } else
1485                         rval = QLA_FUNCTION_TIMEOUT;
1486         }
1487         if (rval != QLA_SUCCESS)
1488                 goto done;
1489
1490 next_test:
1491         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1492                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1493
1494 done:
1495         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1496         RD_REG_DWORD(&reg->iobase_window);
1497 }
1498
1499 /**
1500  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1501  * @irq:
1502  * @dev_id: SCSI driver HA context
1503  *
1504  * Called by system whenever the host adapter generates an interrupt.
1505  *
1506  * Returns handled flag.
1507  */
1508 irqreturn_t
1509 qla24xx_intr_handler(int irq, void *dev_id)
1510 {
1511         scsi_qla_host_t *ha;
1512         struct device_reg_24xx __iomem *reg;
1513         int             status;
1514         unsigned long   iter;
1515         uint32_t        stat;
1516         uint32_t        hccr;
1517         uint16_t        mb[4];
1518
1519         ha = (scsi_qla_host_t *) dev_id;
1520         if (!ha) {
1521                 printk(KERN_INFO
1522                     "%s(): NULL host pointer\n", __func__);
1523                 return IRQ_NONE;
1524         }
1525
1526         reg = &ha->iobase->isp24;
1527         status = 0;
1528
1529         spin_lock(&ha->hardware_lock);
1530         for (iter = 50; iter--; ) {
1531                 stat = RD_REG_DWORD(&reg->host_status);
1532                 if (stat & HSRX_RISC_PAUSED) {
1533                         if (pci_channel_offline(ha->pdev))
1534                                 break;
1535
1536                         if (ha->hw_event_pause_errors == 0)
1537                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1538                                     0, MSW(stat), LSW(stat));
1539                         else if (ha->hw_event_pause_errors < 0xffffffff)
1540                                 ha->hw_event_pause_errors++;
1541
1542                         hccr = RD_REG_DWORD(&reg->hccr);
1543
1544                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1545                             "Dumping firmware!\n", hccr);
1546
1547                         qla2xxx_check_risc_status(ha);
1548
1549                         ha->isp_ops->fw_dump(ha, 1);
1550                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1551                         break;
1552                 } else if ((stat & HSRX_RISC_INT) == 0)
1553                         break;
1554
1555                 switch (stat & 0xff) {
1556                 case 0x1:
1557                 case 0x2:
1558                 case 0x10:
1559                 case 0x11:
1560                         qla24xx_mbx_completion(ha, MSW(stat));
1561                         status |= MBX_INTERRUPT;
1562
1563                         break;
1564                 case 0x12:
1565                         mb[0] = MSW(stat);
1566                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1567                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1568                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1569                         qla2x00_async_event(ha, mb);
1570                         break;
1571                 case 0x13:
1572                         qla24xx_process_response_queue(ha);
1573                         break;
1574                 default:
1575                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1576                             "(%d).\n",
1577                             ha->host_no, stat & 0xff));
1578                         break;
1579                 }
1580                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1581                 RD_REG_DWORD_RELAXED(&reg->hccr);
1582         }
1583         spin_unlock(&ha->hardware_lock);
1584
1585         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1586             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1587                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1588                 complete(&ha->mbx_intr_comp);
1589         }
1590
1591         return IRQ_HANDLED;
1592 }
1593
1594 static irqreturn_t
1595 qla24xx_msix_rsp_q(int irq, void *dev_id)
1596 {
1597         scsi_qla_host_t *ha;
1598         struct device_reg_24xx __iomem *reg;
1599
1600         ha = dev_id;
1601         reg = &ha->iobase->isp24;
1602
1603         spin_lock_irq(&ha->hardware_lock);
1604
1605         qla24xx_process_response_queue(ha);
1606         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1607
1608         spin_unlock_irq(&ha->hardware_lock);
1609
1610         return IRQ_HANDLED;
1611 }
1612
1613 static irqreturn_t
1614 qla24xx_msix_default(int irq, void *dev_id)
1615 {
1616         scsi_qla_host_t *ha;
1617         struct device_reg_24xx __iomem *reg;
1618         int             status;
1619         uint32_t        stat;
1620         uint32_t        hccr;
1621         uint16_t        mb[4];
1622
1623         ha = dev_id;
1624         reg = &ha->iobase->isp24;
1625         status = 0;
1626
1627         spin_lock_irq(&ha->hardware_lock);
1628         do {
1629                 stat = RD_REG_DWORD(&reg->host_status);
1630                 if (stat & HSRX_RISC_PAUSED) {
1631                         if (pci_channel_offline(ha->pdev))
1632                                 break;
1633
1634                         if (ha->hw_event_pause_errors == 0)
1635                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1636                                     0, MSW(stat), LSW(stat));
1637                         else if (ha->hw_event_pause_errors < 0xffffffff)
1638                                 ha->hw_event_pause_errors++;
1639
1640                         hccr = RD_REG_DWORD(&reg->hccr);
1641
1642                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1643                             "Dumping firmware!\n", hccr);
1644
1645                         qla2xxx_check_risc_status(ha);
1646
1647                         ha->isp_ops->fw_dump(ha, 1);
1648                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1649                         break;
1650                 } else if ((stat & HSRX_RISC_INT) == 0)
1651                         break;
1652
1653                 switch (stat & 0xff) {
1654                 case 0x1:
1655                 case 0x2:
1656                 case 0x10:
1657                 case 0x11:
1658                         qla24xx_mbx_completion(ha, MSW(stat));
1659                         status |= MBX_INTERRUPT;
1660
1661                         break;
1662                 case 0x12:
1663                         mb[0] = MSW(stat);
1664                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1665                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1666                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1667                         qla2x00_async_event(ha, mb);
1668                         break;
1669                 case 0x13:
1670                         qla24xx_process_response_queue(ha);
1671                         break;
1672                 default:
1673                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1674                             "(%d).\n",
1675                             ha->host_no, stat & 0xff));
1676                         break;
1677                 }
1678                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1679         } while (0);
1680         spin_unlock_irq(&ha->hardware_lock);
1681
1682         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1683             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1684                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1685                 complete(&ha->mbx_intr_comp);
1686         }
1687
1688         return IRQ_HANDLED;
1689 }
1690
1691 /* Interrupt handling helpers. */
1692
1693 struct qla_init_msix_entry {
1694         uint16_t entry;
1695         uint16_t index;
1696         const char *name;
1697         irq_handler_t handler;
1698 };
1699
1700 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1701         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1702                 "qla2xxx (default)", qla24xx_msix_default },
1703
1704         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1705                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1706 };
1707
1708 static void
1709 qla24xx_disable_msix(scsi_qla_host_t *ha)
1710 {
1711         int i;
1712         struct qla_msix_entry *qentry;
1713
1714         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1715                 qentry = &ha->msix_entries[imsix_entries[i].index];
1716                 if (qentry->have_irq)
1717                         free_irq(qentry->msix_vector, ha);
1718         }
1719         pci_disable_msix(ha->pdev);
1720 }
1721
1722 static int
1723 qla24xx_enable_msix(scsi_qla_host_t *ha)
1724 {
1725         int i, ret;
1726         struct msix_entry entries[QLA_MSIX_ENTRIES];
1727         struct qla_msix_entry *qentry;
1728
1729         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1730                 entries[i].entry = imsix_entries[i].entry;
1731
1732         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1733         if (ret) {
1734                 qla_printk(KERN_WARNING, ha,
1735                     "MSI-X: Failed to enable support -- %d/%d\n",
1736                     QLA_MSIX_ENTRIES, ret);
1737                 goto msix_out;
1738         }
1739         ha->flags.msix_enabled = 1;
1740
1741         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1742                 qentry = &ha->msix_entries[imsix_entries[i].index];
1743                 qentry->msix_vector = entries[i].vector;
1744                 qentry->msix_entry = entries[i].entry;
1745                 qentry->have_irq = 0;
1746                 ret = request_irq(qentry->msix_vector,
1747                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1748                 if (ret) {
1749                         qla_printk(KERN_WARNING, ha,
1750                             "MSI-X: Unable to register handler -- %x/%d.\n",
1751                             imsix_entries[i].index, ret);
1752                         qla24xx_disable_msix(ha);
1753                         goto msix_out;
1754                 }
1755                 qentry->have_irq = 1;
1756         }
1757
1758 msix_out:
1759         return ret;
1760 }
1761
1762 int
1763 qla2x00_request_irqs(scsi_qla_host_t *ha)
1764 {
1765         int ret;
1766         device_reg_t __iomem *reg = ha->iobase;
1767
1768         /* If possible, enable MSI-X. */
1769         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1770                 goto skip_msix;
1771
1772         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1773             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1774                 DEBUG2(qla_printk(KERN_WARNING, ha,
1775                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1776                     ha->chip_revision, ha->fw_attributes));
1777
1778                 goto skip_msix;
1779         }
1780
1781         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1782             (ha->pdev->subsystem_device == 0x7040 ||
1783                 ha->pdev->subsystem_device == 0x7041 ||
1784                 ha->pdev->subsystem_device == 0x1705)) {
1785                 DEBUG2(qla_printk(KERN_WARNING, ha,
1786                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1787                     ha->pdev->subsystem_vendor,
1788                     ha->pdev->subsystem_device));
1789
1790                 goto skip_msi;
1791         }
1792
1793         ret = qla24xx_enable_msix(ha);
1794         if (!ret) {
1795                 DEBUG2(qla_printk(KERN_INFO, ha,
1796                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1797                     ha->fw_attributes));
1798                 goto clear_risc_ints;
1799         }
1800         qla_printk(KERN_WARNING, ha,
1801             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1802 skip_msix:
1803
1804         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1805                 goto skip_msi;
1806
1807         ret = pci_enable_msi(ha->pdev);
1808         if (!ret) {
1809                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1810                 ha->flags.msi_enabled = 1;
1811         }
1812 skip_msi:
1813
1814         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1815             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1816         if (ret) {
1817                 qla_printk(KERN_WARNING, ha,
1818                     "Failed to reserve interrupt %d already in use.\n",
1819                     ha->pdev->irq);
1820                 goto fail;
1821         }
1822         ha->flags.inta_enabled = 1;
1823         ha->host->irq = ha->pdev->irq;
1824 clear_risc_ints:
1825
1826         ha->isp_ops->disable_intrs(ha);
1827         spin_lock_irq(&ha->hardware_lock);
1828         if (IS_FWI2_CAPABLE(ha)) {
1829                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1830                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1831         } else {
1832                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1833                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1834                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1835         }
1836         spin_unlock_irq(&ha->hardware_lock);
1837
1838 fail:
1839         return ret;
1840 }
1841
1842 void
1843 qla2x00_free_irqs(scsi_qla_host_t *ha)
1844 {
1845
1846         if (ha->flags.msix_enabled)
1847                 qla24xx_disable_msix(ha);
1848         else if (ha->flags.inta_enabled) {
1849                 free_irq(ha->host->irq, ha);
1850                 pci_disable_msi(ha->pdev);
1851         }
1852 }