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 occured (%x).\n", ha->host_no,
 395                     mb[1]));
 396                 qla_printk(KERN_INFO, ha, "LIP occured (%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 occured (%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 (recieved LIP_OCCURED/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->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->ha->host_no, cp->device->channel,
 886             cp->device->id, cp->device->lun, cp, cp->serial_number));
 887         if (sense_len)
 888                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
 889                     CMD_ACTUAL_SNSLEN(cp)));
 890 }
 891
 892 /**
 893  * qla2x00_status_entry() - Process a Status IOCB entry.
 894  * @ha: SCSI driver HA context
 895  * @pkt: Entry pointer
 896  */
 897 static void
 898 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 899 {
 900         srb_t           *sp;
 901         fc_port_t       *fcport;
 902         struct scsi_cmnd *cp;
 903         sts_entry_t *sts;
 904         struct sts_entry_24xx *sts24;
 905         uint16_t        comp_status;
 906         uint16_t        scsi_status;
 907         uint8_t         lscsi_status;
 908         int32_t         resid;
 909         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
 910         uint8_t         *rsp_info, *sense_data;
 911
 912         sts = (sts_entry_t *) pkt;
 913         sts24 = (struct sts_entry_24xx *) pkt;
 914         if (IS_FWI2_CAPABLE(ha)) {
 915                 comp_status = le16_to_cpu(sts24->comp_status);
 916                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
 917         } else {
 918                 comp_status = le16_to_cpu(sts->comp_status);
 919                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
 920         }
 921
 922         /* Fast path completion. */
 923         if (comp_status == CS_COMPLETE && scsi_status == 0) {
 924                 qla2x00_process_completed_request(ha, sts->handle);
 925
 926                 return;
 927         }
 928
 929         /* Validate handle. */
 930         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
 931                 sp = ha->outstanding_cmds[sts->handle];
 932                 ha->outstanding_cmds[sts->handle] = NULL;
 933         } else
 934                 sp = NULL;
 935
 936         if (sp == NULL) {
 937                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
 938                     ha->host_no));
 939                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
 940
 941                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 942                 qla2xxx_wake_dpc(ha);
 943                 return;
 944         }
 945         cp = sp->cmd;
 946         if (cp == NULL) {
 947                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
 948                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
 949                 qla_printk(KERN_WARNING, ha,
 950                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
 951
 952                 return;
 953         }
 954
 955         lscsi_status = scsi_status & STATUS_MASK;
 956         CMD_ENTRY_STATUS(cp) = sts->entry_status;
 957         CMD_COMPL_STATUS(cp) = comp_status;
 958         CMD_SCSI_STATUS(cp) = scsi_status;
 959
 960         fcport = sp->fcport;
 961
 962         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
 963         if (IS_FWI2_CAPABLE(ha)) {
 964                 sense_len = le32_to_cpu(sts24->sense_len);
 965                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
 966                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
 967                 fw_resid_len = le32_to_cpu(sts24->residual_len);
 968                 rsp_info = sts24->data;
 969                 sense_data = sts24->data;
 970                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
 971         } else {
 972                 sense_len = le16_to_cpu(sts->req_sense_length);
 973                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
 974                 resid_len = le32_to_cpu(sts->residual_length);
 975                 rsp_info = sts->rsp_info;
 976                 sense_data = sts->req_sense_data;
 977         }
 978
 979         /* Check for any FCP transport errors. */
 980         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
 981                 /* Sense data lies beyond any FCP RESPONSE data. */
 982                 if (IS_FWI2_CAPABLE(ha))
 983                         sense_data += rsp_info_len;
 984                 if (rsp_info_len > 3 && rsp_info[3]) {
 985                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
 986                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
 987                             "retrying command\n", ha->host_no,
 988                             cp->device->channel, cp->device->id,
 989                             cp->device->lun, rsp_info_len, rsp_info[0],
 990                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
 991                             rsp_info[5], rsp_info[6], rsp_info[7]));
 992
 993                         cp->result = DID_BUS_BUSY << 16;
 994                         qla2x00_sp_compl(ha, sp);
 995                         return;
 996                 }
 997         }
 998
 999         /* Check for overrun. */
1000         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1001             scsi_status & SS_RESIDUAL_OVER)
1002                 comp_status = CS_DATA_OVERRUN;
1003
1004         /*
1005          * Based on Host and scsi status generate status code for Linux
1006          */
1007         switch (comp_status) {
1008         case CS_COMPLETE:
1009         case CS_QUEUE_FULL:
1010                 if (scsi_status == 0) {
1011                         cp->result = DID_OK << 16;
1012                         break;
1013                 }
1014                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1015                         resid = resid_len;
1016                         scsi_set_resid(cp, resid);
1017                         CMD_RESID_LEN(cp) = resid;
1018
1019                         if (!lscsi_status &&
1020                             ((unsigned)(scsi_bufflen(cp) - resid) <
1021                              cp->underflow)) {
1022                                 qla_printk(KERN_INFO, ha,
1023                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1024                                            "detected (%x of %x bytes)...returning "
1025                                            "error status.\n", ha->host_no,
1026                                            cp->device->channel, cp->device->id,
1027                                            cp->device->lun, resid,
1028                                            scsi_bufflen(cp));
1029
1030                                 cp->result = DID_ERROR << 16;
1031                                 break;
1032                         }
1033                 }
1034                 cp->result = DID_OK << 16 | lscsi_status;
1035
1036                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1037                         DEBUG2(printk(KERN_INFO
1038                             "scsi(%ld): QUEUE FULL status detected "
1039                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1040                             scsi_status));
1041
1042                         /* Adjust queue depth for all luns on the port. */
1043                         fcport->last_queue_full = jiffies;
1044                         starget_for_each_device(cp->device->sdev_target,
1045                             fcport, qla2x00_adjust_sdev_qdepth_down);
1046                         break;
1047                 }
1048                 if (lscsi_status != SS_CHECK_CONDITION)
1049                         break;
1050
1051                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1052                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1053                         break;
1054
1055                 qla2x00_handle_sense(sp, sense_data, sense_len);
1056                 break;
1057
1058         case CS_DATA_UNDERRUN:
1059                 resid = resid_len;
1060                 /* Use F/W calculated residual length. */
1061                 if (IS_FWI2_CAPABLE(ha)) {
1062                         if (scsi_status & SS_RESIDUAL_UNDER &&
1063                             resid != fw_resid_len) {
1064                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1065                                 lscsi_status = 0;
1066                         }
1067                         resid = fw_resid_len;
1068                 }
1069
1070                 if (scsi_status & SS_RESIDUAL_UNDER) {
1071                         scsi_set_resid(cp, resid);
1072                         CMD_RESID_LEN(cp) = resid;
1073                 } else {
1074                         DEBUG2(printk(KERN_INFO
1075                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1076                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1077                             "os_underflow=0x%x\n", ha->host_no,
1078                             cp->device->id, cp->device->lun, comp_status,
1079                             scsi_status, resid_len, resid, cp->cmnd[0],
1080                             cp->underflow));
1081
1082                 }
1083
1084                 /*
1085                  * Check to see if SCSI Status is non zero. If so report SCSI
1086                  * Status.
1087                  */
1088                 if (lscsi_status != 0) {
1089                         cp->result = DID_OK << 16 | lscsi_status;
1090
1091                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1092                                 DEBUG2(printk(KERN_INFO
1093                                     "scsi(%ld): QUEUE FULL status detected "
1094                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1095                                     scsi_status));
1096
1097                                 /*
1098                                  * Adjust queue depth for all luns on the
1099                                  * port.
1100                                  */
1101                                 fcport->last_queue_full = jiffies;
1102                                 starget_for_each_device(
1103                                     cp->device->sdev_target, fcport,
1104                                     qla2x00_adjust_sdev_qdepth_down);
1105                                 break;
1106                         }
1107                         if (lscsi_status != SS_CHECK_CONDITION)
1108                                 break;
1109
1110                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1111                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1112                                 break;
1113
1114                         qla2x00_handle_sense(sp, sense_data, sense_len);
1115                 } else {
1116                         /*
1117                          * If RISC reports underrun and target does not report
1118                          * it then we must have a lost frame, so tell upper
1119                          * layer to retry it by reporting a bus busy.
1120                          */
1121                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1122                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1123                                               "frame(s) detected (%x of %x bytes)..."
1124                                               "retrying command.\n", ha->host_no,
1125                                               cp->device->channel, cp->device->id,
1126                                               cp->device->lun, resid,
1127                                               scsi_bufflen(cp)));
1128
1129                                 cp->result = DID_BUS_BUSY << 16;
1130                                 break;
1131                         }
1132
1133                         /* Handle mid-layer underflow */
1134                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1135                             cp->underflow) {
1136                                 qla_printk(KERN_INFO, ha,
1137                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1138                                            "detected (%x of %x bytes)...returning "
1139                                            "error status.\n", ha->host_no,
1140                                            cp->device->channel, cp->device->id,
1141                                            cp->device->lun, resid,
1142                                            scsi_bufflen(cp));
1143
1144                                 cp->result = DID_ERROR << 16;
1145                                 break;
1146                         }
1147
1148                         /* Everybody online, looking good... */
1149                         cp->result = DID_OK << 16;
1150                 }
1151                 break;
1152
1153         case CS_DATA_OVERRUN:
1154                 DEBUG2(printk(KERN_INFO
1155                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1156                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1157                     scsi_status));
1158                 DEBUG2(printk(KERN_INFO
1159                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1160                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1161                     cp->cmnd[4], cp->cmnd[5]));
1162                 DEBUG2(printk(KERN_INFO
1163                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1164                     "status!\n",
1165                     cp->serial_number, scsi_bufflen(cp), resid_len));
1166
1167                 cp->result = DID_ERROR << 16;
1168                 break;
1169
1170         case CS_PORT_LOGGED_OUT:
1171         case CS_PORT_CONFIG_CHG:
1172         case CS_PORT_BUSY:
1173         case CS_INCOMPLETE:
1174         case CS_PORT_UNAVAILABLE:
1175                 /*
1176                  * If the port is in Target Down state, return all IOs for this
1177                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1178                  * retry_queue.
1179                  */
1180                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1181                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1182                     ha->host_no, cp->device->id, cp->device->lun,
1183                     cp->serial_number, comp_status,
1184                     atomic_read(&fcport->state)));
1185
1186                 cp->result = DID_BUS_BUSY << 16;
1187                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1188                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1189                 break;
1190
1191         case CS_RESET:
1192                 DEBUG2(printk(KERN_INFO
1193                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1194                     ha->host_no, comp_status, scsi_status));
1195
1196                 cp->result = DID_RESET << 16;
1197                 break;
1198
1199         case CS_ABORTED:
1200                 /*
1201                  * hv2.19.12 - DID_ABORT does not retry the request if we
1202                  * aborted this request then abort otherwise it must be a
1203                  * reset.
1204                  */
1205                 DEBUG2(printk(KERN_INFO
1206                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1207                     ha->host_no, comp_status, scsi_status));
1208
1209                 cp->result = DID_RESET << 16;
1210                 break;
1211
1212         case CS_TIMEOUT:
1213                 cp->result = DID_BUS_BUSY << 16;
1214
1215                 if (IS_FWI2_CAPABLE(ha)) {
1216                         DEBUG2(printk(KERN_INFO
1217                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1218                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1219                             cp->device->id, cp->device->lun, comp_status,
1220                             scsi_status));
1221                         break;
1222                 }
1223                 DEBUG2(printk(KERN_INFO
1224                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1225                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1226                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1227                     le16_to_cpu(sts->status_flags)));
1228
1229                 /* Check to see if logout occurred. */
1230                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1231                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1232                 break;
1233
1234         default:
1235                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1236                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1237                 qla_printk(KERN_INFO, ha,
1238                     "Unknown status detected 0x%x-0x%x.\n",
1239                     comp_status, scsi_status);
1240
1241                 cp->result = DID_ERROR << 16;
1242                 break;
1243         }
1244
1245         /* Place command on done queue. */
1246         if (ha->status_srb == NULL)
1247                 qla2x00_sp_compl(ha, sp);
1248 }
1249
1250 /**
1251  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1252  * @ha: SCSI driver HA context
1253  * @pkt: Entry pointer
1254  *
1255  * Extended sense data.
1256  */
1257 static void
1258 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1259 {
1260         uint8_t         sense_sz = 0;
1261         srb_t           *sp = ha->status_srb;
1262         struct scsi_cmnd *cp;
1263
1264         if (sp != NULL && sp->request_sense_length != 0) {
1265                 cp = sp->cmd;
1266                 if (cp == NULL) {
1267                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1268                             "sp=%p.\n", __func__, sp));
1269                         qla_printk(KERN_INFO, ha,
1270                             "cmd is NULL: already returned to OS (sp=%p)\n",
1271                             sp);
1272
1273                         ha->status_srb = NULL;
1274                         return;
1275                 }
1276
1277                 if (sp->request_sense_length > sizeof(pkt->data)) {
1278                         sense_sz = sizeof(pkt->data);
1279                 } else {
1280                         sense_sz = sp->request_sense_length;
1281                 }
1282
1283                 /* Move sense data. */
1284                 if (IS_FWI2_CAPABLE(ha))
1285                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1286                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1287                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1288
1289                 sp->request_sense_ptr += sense_sz;
1290                 sp->request_sense_length -= sense_sz;
1291
1292                 /* Place command on done queue. */
1293                 if (sp->request_sense_length == 0) {
1294                         ha->status_srb = NULL;
1295                         qla2x00_sp_compl(ha, sp);
1296                 }
1297         }
1298 }
1299
1300 /**
1301  * qla2x00_error_entry() - Process an error entry.
1302  * @ha: SCSI driver HA context
1303  * @pkt: Entry pointer
1304  */
1305 static void
1306 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1307 {
1308         srb_t *sp;
1309
1310 #if defined(QL_DEBUG_LEVEL_2)
1311         if (pkt->entry_status & RF_INV_E_ORDER)
1312                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1313         else if (pkt->entry_status & RF_INV_E_COUNT)
1314                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1315         else if (pkt->entry_status & RF_INV_E_PARAM)
1316                 qla_printk(KERN_ERR, ha,
1317                     "%s: Invalid Entry Parameter\n", __func__);
1318         else if (pkt->entry_status & RF_INV_E_TYPE)
1319                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1320         else if (pkt->entry_status & RF_BUSY)
1321                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1322         else
1323                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1324 #endif
1325
1326         /* Validate handle. */
1327         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1328                 sp = ha->outstanding_cmds[pkt->handle];
1329         else
1330                 sp = NULL;
1331
1332         if (sp) {
1333                 /* Free outstanding command slot. */
1334                 ha->outstanding_cmds[pkt->handle] = NULL;
1335
1336                 /* Bad payload or header */
1337                 if (pkt->entry_status &
1338                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1339                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1340                         sp->cmd->result = DID_ERROR << 16;
1341                 } else if (pkt->entry_status & RF_BUSY) {
1342                         sp->cmd->result = DID_BUS_BUSY << 16;
1343                 } else {
1344                         sp->cmd->result = DID_ERROR << 16;
1345                 }
1346                 qla2x00_sp_compl(ha, sp);
1347
1348         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1349             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1350                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1351                     ha->host_no));
1352                 qla_printk(KERN_WARNING, ha,
1353                     "Error entry - invalid handle\n");
1354
1355                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1356                 qla2xxx_wake_dpc(ha);
1357         }
1358 }
1359
1360 /**
1361  * qla24xx_mbx_completion() - Process mailbox command completions.
1362  * @ha: SCSI driver HA context
1363  * @mb0: Mailbox0 register
1364  */
1365 static void
1366 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1367 {
1368         uint16_t        cnt;
1369         uint16_t __iomem *wptr;
1370         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1371
1372         /* Load return mailbox registers. */
1373         ha->flags.mbox_int = 1;
1374         ha->mailbox_out[0] = mb0;
1375         wptr = (uint16_t __iomem *)&reg->mailbox1;
1376
1377         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1378                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1379                 wptr++;
1380         }
1381
1382         if (ha->mcp) {
1383                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1384                     __func__, ha->host_no, ha->mcp->mb[0]));
1385         } else {
1386                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1387                     __func__, ha->host_no));
1388         }
1389 }
1390
1391 /**
1392  * qla24xx_process_response_queue() - Process response queue entries.
1393  * @ha: SCSI driver HA context
1394  */
1395 void
1396 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1397 {
1398         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1399         struct sts_entry_24xx *pkt;
1400
1401         if (!ha->flags.online)
1402                 return;
1403
1404         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1405                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1406
1407                 ha->rsp_ring_index++;
1408                 if (ha->rsp_ring_index == ha->response_q_length) {
1409                         ha->rsp_ring_index = 0;
1410                         ha->response_ring_ptr = ha->response_ring;
1411                 } else {
1412                         ha->response_ring_ptr++;
1413                 }
1414
1415                 if (pkt->entry_status != 0) {
1416                         DEBUG3(printk(KERN_INFO
1417                             "scsi(%ld): Process error entry.\n", ha->host_no));
1418
1419                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1420                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1421                         wmb();
1422                         continue;
1423                 }
1424
1425                 switch (pkt->entry_type) {
1426                 case STATUS_TYPE:
1427                         qla2x00_status_entry(ha, pkt);
1428                         break;
1429                 case STATUS_CONT_TYPE:
1430                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1431                         break;
1432                 case VP_RPT_ID_IOCB_TYPE:
1433                         qla24xx_report_id_acquisition(ha,
1434                             (struct vp_rpt_id_entry_24xx *)pkt);
1435                         break;
1436                 default:
1437                         /* Type Not Supported. */
1438                         DEBUG4(printk(KERN_WARNING
1439                             "scsi(%ld): Received unknown response pkt type %x "
1440                             "entry status=%x.\n",
1441                             ha->host_no, pkt->entry_type, pkt->entry_status));
1442                         break;
1443                 }
1444                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1445                 wmb();
1446         }
1447
1448         /* Adjust ring index */
1449         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1450 }
1451
1452 static void
1453 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1454 {
1455         int rval;
1456         uint32_t cnt;
1457         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1458
1459         if (!IS_QLA25XX(ha))
1460                 return;
1461
1462         rval = QLA_SUCCESS;
1463         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1464         RD_REG_DWORD(&reg->iobase_addr);
1465         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1466         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1467             rval == QLA_SUCCESS; cnt--) {
1468                 if (cnt) {
1469                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1470                         udelay(10);
1471                 } else
1472                         rval = QLA_FUNCTION_TIMEOUT;
1473         }
1474         if (rval == QLA_SUCCESS)
1475                 goto next_test;
1476
1477         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1478         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1479             rval == QLA_SUCCESS; cnt--) {
1480                 if (cnt) {
1481                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1482                         udelay(10);
1483                 } else
1484                         rval = QLA_FUNCTION_TIMEOUT;
1485         }
1486         if (rval != QLA_SUCCESS)
1487                 goto done;
1488
1489 next_test:
1490         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1491                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1492
1493 done:
1494         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1495         RD_REG_DWORD(&reg->iobase_window);
1496 }
1497
1498 /**
1499  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1500  * @irq:
1501  * @dev_id: SCSI driver HA context
1502  *
1503  * Called by system whenever the host adapter generates an interrupt.
1504  *
1505  * Returns handled flag.
1506  */
1507 irqreturn_t
1508 qla24xx_intr_handler(int irq, void *dev_id)
1509 {
1510         scsi_qla_host_t *ha;
1511         struct device_reg_24xx __iomem *reg;
1512         int             status;
1513         unsigned long   iter;
1514         uint32_t        stat;
1515         uint32_t        hccr;
1516         uint16_t        mb[4];
1517
1518         ha = (scsi_qla_host_t *) dev_id;
1519         if (!ha) {
1520                 printk(KERN_INFO
1521                     "%s(): NULL host pointer\n", __func__);
1522                 return IRQ_NONE;
1523         }
1524
1525         reg = &ha->iobase->isp24;
1526         status = 0;
1527
1528         spin_lock(&ha->hardware_lock);
1529         for (iter = 50; iter--; ) {
1530                 stat = RD_REG_DWORD(&reg->host_status);
1531                 if (stat & HSRX_RISC_PAUSED) {
1532                         if (pci_channel_offline(ha->pdev))
1533                                 break;
1534
1535                         if (ha->hw_event_pause_errors == 0)
1536                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1537                                     0, MSW(stat), LSW(stat));
1538                         else if (ha->hw_event_pause_errors < 0xffffffff)
1539                                 ha->hw_event_pause_errors++;
1540
1541                         hccr = RD_REG_DWORD(&reg->hccr);
1542
1543                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1544                             "Dumping firmware!\n", hccr);
1545
1546                         qla2xxx_check_risc_status(ha);
1547
1548                         ha->isp_ops->fw_dump(ha, 1);
1549                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1550                         break;
1551                 } else if ((stat & HSRX_RISC_INT) == 0)
1552                         break;
1553
1554                 switch (stat & 0xff) {
1555                 case 0x1:
1556                 case 0x2:
1557                 case 0x10:
1558                 case 0x11:
1559                         qla24xx_mbx_completion(ha, MSW(stat));
1560                         status |= MBX_INTERRUPT;
1561
1562                         break;
1563                 case 0x12:
1564                         mb[0] = MSW(stat);
1565                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1566                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1567                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1568                         qla2x00_async_event(ha, mb);
1569                         break;
1570                 case 0x13:
1571                         qla24xx_process_response_queue(ha);
1572                         break;
1573                 default:
1574                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1575                             "(%d).\n",
1576                             ha->host_no, stat & 0xff));
1577                         break;
1578                 }
1579                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1580                 RD_REG_DWORD_RELAXED(&reg->hccr);
1581         }
1582         spin_unlock(&ha->hardware_lock);
1583
1584         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1585             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1586                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1587                 complete(&ha->mbx_intr_comp);
1588         }
1589
1590         return IRQ_HANDLED;
1591 }
1592
1593 static irqreturn_t
1594 qla24xx_msix_rsp_q(int irq, void *dev_id)
1595 {
1596         scsi_qla_host_t *ha;
1597         struct device_reg_24xx __iomem *reg;
1598
1599         ha = dev_id;
1600         reg = &ha->iobase->isp24;
1601
1602         spin_lock_irq(&ha->hardware_lock);
1603
1604         qla24xx_process_response_queue(ha);
1605         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1606
1607         spin_unlock_irq(&ha->hardware_lock);
1608
1609         return IRQ_HANDLED;
1610 }
1611
1612 static irqreturn_t
1613 qla24xx_msix_default(int irq, void *dev_id)
1614 {
1615         scsi_qla_host_t *ha;
1616         struct device_reg_24xx __iomem *reg;
1617         int             status;
1618         uint32_t        stat;
1619         uint32_t        hccr;
1620         uint16_t        mb[4];
1621
1622         ha = dev_id;
1623         reg = &ha->iobase->isp24;
1624         status = 0;
1625
1626         spin_lock_irq(&ha->hardware_lock);
1627         do {
1628                 stat = RD_REG_DWORD(&reg->host_status);
1629                 if (stat & HSRX_RISC_PAUSED) {
1630                         if (pci_channel_offline(ha->pdev))
1631                                 break;
1632
1633                         if (ha->hw_event_pause_errors == 0)
1634                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1635                                     0, MSW(stat), LSW(stat));
1636                         else if (ha->hw_event_pause_errors < 0xffffffff)
1637                                 ha->hw_event_pause_errors++;
1638
1639                         hccr = RD_REG_DWORD(&reg->hccr);
1640
1641                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1642                             "Dumping firmware!\n", hccr);
1643
1644                         qla2xxx_check_risc_status(ha);
1645
1646                         ha->isp_ops->fw_dump(ha, 1);
1647                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1648                         break;
1649                 } else if ((stat & HSRX_RISC_INT) == 0)
1650                         break;
1651
1652                 switch (stat & 0xff) {
1653                 case 0x1:
1654                 case 0x2:
1655                 case 0x10:
1656                 case 0x11:
1657                         qla24xx_mbx_completion(ha, MSW(stat));
1658                         status |= MBX_INTERRUPT;
1659
1660                         break;
1661                 case 0x12:
1662                         mb[0] = MSW(stat);
1663                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1664                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1665                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1666                         qla2x00_async_event(ha, mb);
1667                         break;
1668                 case 0x13:
1669                         qla24xx_process_response_queue(ha);
1670                         break;
1671                 default:
1672                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1673                             "(%d).\n",
1674                             ha->host_no, stat & 0xff));
1675                         break;
1676                 }
1677                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1678         } while (0);
1679         spin_unlock_irq(&ha->hardware_lock);
1680
1681         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1682             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1683                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1684                 complete(&ha->mbx_intr_comp);
1685         }
1686
1687         return IRQ_HANDLED;
1688 }
1689
1690 /* Interrupt handling helpers. */
1691
1692 struct qla_init_msix_entry {
1693         uint16_t entry;
1694         uint16_t index;
1695         const char *name;
1696         irq_handler_t handler;
1697 };
1698
1699 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1700         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1701                 "qla2xxx (default)", qla24xx_msix_default },
1702
1703         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1704                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1705 };
1706
1707 static void
1708 qla24xx_disable_msix(scsi_qla_host_t *ha)
1709 {
1710         int i;
1711         struct qla_msix_entry *qentry;
1712
1713         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1714                 qentry = &ha->msix_entries[imsix_entries[i].index];
1715                 if (qentry->have_irq)
1716                         free_irq(qentry->msix_vector, ha);
1717         }
1718         pci_disable_msix(ha->pdev);
1719 }
1720
1721 static int
1722 qla24xx_enable_msix(scsi_qla_host_t *ha)
1723 {
1724         int i, ret;
1725         struct msix_entry entries[QLA_MSIX_ENTRIES];
1726         struct qla_msix_entry *qentry;
1727
1728         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1729                 entries[i].entry = imsix_entries[i].entry;
1730
1731         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1732         if (ret) {
1733                 qla_printk(KERN_WARNING, ha,
1734                     "MSI-X: Failed to enable support -- %d/%d\n",
1735                     QLA_MSIX_ENTRIES, ret);
1736                 goto msix_out;
1737         }
1738         ha->flags.msix_enabled = 1;
1739
1740         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1741                 qentry = &ha->msix_entries[imsix_entries[i].index];
1742                 qentry->msix_vector = entries[i].vector;
1743                 qentry->msix_entry = entries[i].entry;
1744                 qentry->have_irq = 0;
1745                 ret = request_irq(qentry->msix_vector,
1746                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1747                 if (ret) {
1748                         qla_printk(KERN_WARNING, ha,
1749                             "MSI-X: Unable to register handler -- %x/%d.\n",
1750                             imsix_entries[i].index, ret);
1751                         qla24xx_disable_msix(ha);
1752                         goto msix_out;
1753                 }
1754                 qentry->have_irq = 1;
1755         }
1756
1757 msix_out:
1758         return ret;
1759 }
1760
1761 int
1762 qla2x00_request_irqs(scsi_qla_host_t *ha)
1763 {
1764         int ret;
1765         device_reg_t __iomem *reg = ha->iobase;
1766
1767         /* If possible, enable MSI-X. */
1768         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1769                 goto skip_msix;
1770
1771         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1772             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1773                 DEBUG2(qla_printk(KERN_WARNING, ha,
1774                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1775                     ha->chip_revision, ha->fw_attributes));
1776
1777                 goto skip_msix;
1778         }
1779
1780         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1781             (ha->pdev->subsystem_device == 0x7040 ||
1782                 ha->pdev->subsystem_device == 0x7041 ||
1783                 ha->pdev->subsystem_device == 0x1705)) {
1784                 DEBUG2(qla_printk(KERN_WARNING, ha,
1785                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1786                     ha->pdev->subsystem_vendor,
1787                     ha->pdev->subsystem_device));
1788
1789                 goto skip_msi;
1790         }
1791
1792         ret = qla24xx_enable_msix(ha);
1793         if (!ret) {
1794                 DEBUG2(qla_printk(KERN_INFO, ha,
1795                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1796                     ha->fw_attributes));
1797                 goto clear_risc_ints;
1798         }
1799         qla_printk(KERN_WARNING, ha,
1800             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1801 skip_msix:
1802
1803         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1804                 goto skip_msi;
1805
1806         ret = pci_enable_msi(ha->pdev);
1807         if (!ret) {
1808                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1809                 ha->flags.msi_enabled = 1;
1810         }
1811 skip_msi:
1812
1813         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1814             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1815         if (ret) {
1816                 qla_printk(KERN_WARNING, ha,
1817                     "Failed to reserve interrupt %d already in use.\n",
1818                     ha->pdev->irq);
1819                 goto fail;
1820         }
1821         ha->flags.inta_enabled = 1;
1822         ha->host->irq = ha->pdev->irq;
1823 clear_risc_ints:
1824
1825         ha->isp_ops->disable_intrs(ha);
1826         spin_lock_irq(&ha->hardware_lock);
1827         if (IS_FWI2_CAPABLE(ha)) {
1828                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1829                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1830         } else {
1831                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1832                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1833                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1834         }
1835         spin_unlock_irq(&ha->hardware_lock);
1836         ha->isp_ops->enable_intrs(ha);
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 }