drivers/scsi/qla2xxx/qla_os.c

   1 /*
   2  *                  QLOGIC LINUX SOFTWARE
   3  *
   4  * QLogic ISP2x00 device driver for Linux 2.6.x
   5  * Copyright (C) 2003-2004 QLogic Corporation
   6  * (www.qlogic.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  */
  19 #include "qla_def.h"
  20
  21 #include <linux/moduleparam.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/smp_lock.h>
  24 #include <linux/delay.h>
  25
  26 #include <scsi/scsi_tcq.h>
  27 #include <scsi/scsicam.h>
  28 #include <scsi/scsi_transport.h>
  29 #include <scsi/scsi_transport_fc.h>
  30
  31 /*
  32  * Driver version
  33  */
  34 char qla2x00_version_str[40];
  35
  36 /*
  37  * SRB allocation cache
  38  */
  39 static kmem_cache_t *srb_cachep;
  40
  41 /*
  42  * Ioctl related information.
  43  */
  44 static int num_hosts;
  45
  46 int ql2xlogintimeout = 20;
  47 module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
  48 MODULE_PARM_DESC(ql2xlogintimeout,
  49                 "Login timeout value in seconds.");
  50
  51 int qlport_down_retry = 30;
  52 module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
  53 MODULE_PARM_DESC(qlport_down_retry,
  54                 "Maximum number of command retries to a port that returns"
  55                 "a PORT-DOWN status.");
  56
  57 int ql2xplogiabsentdevice;
  58 module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
  59 MODULE_PARM_DESC(ql2xplogiabsentdevice,
  60                 "Option to enable PLOGI to devices that are not present after "
  61                 "a Fabric scan.  This is needed for several broken switches."
  62                 "Default is 0 - no PLOGI. 1 - perfom PLOGI.");
  63
  64 int ql2xenablezio = 0;
  65 module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
  66 MODULE_PARM_DESC(ql2xenablezio,
  67                 "Option to enable ZIO:If 1 then enable it otherwise"
  68                 " use the default set in the NVRAM."
  69                 " Default is 0 : disabled");
  70
  71 int ql2xintrdelaytimer = 10;
  72 module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
  73 MODULE_PARM_DESC(ql2xintrdelaytimer,
  74                 "ZIO: Waiting time for Firmware before it generates an "
  75                 "interrupt to the host to notify completion of request.");
  76
  77 int ql2xloginretrycount = 0;
  78 module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
  79 MODULE_PARM_DESC(ql2xloginretrycount,
  80                 "Specify an alternate value for the NVRAM login retry count.");
  81
  82 static void qla2x00_free_device(scsi_qla_host_t *);
  83
  84 static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
  85
  86 /*
  87  * SCSI host template entry points
  88  */
  89 static int qla2xxx_slave_configure(struct scsi_device * device);
  90 static int qla2xxx_slave_alloc(struct scsi_device *);
  91 static void qla2xxx_slave_destroy(struct scsi_device *);
  92 static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
  93                 void (*fn)(struct scsi_cmnd *));
  94 static int qla2xxx_eh_abort(struct scsi_cmnd *);
  95 static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
  96 static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
  97 static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
  98 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
  99 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
 100
 101 static struct scsi_host_template qla2x00_driver_template = {
 102         .module                 = THIS_MODULE,
 103         .name                   = "qla2xxx",
 104         .queuecommand           = qla2x00_queuecommand,
 105
 106         .eh_abort_handler       = qla2xxx_eh_abort,
 107         .eh_device_reset_handler = qla2xxx_eh_device_reset,
 108         .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
 109         .eh_host_reset_handler  = qla2xxx_eh_host_reset,
 110
 111         .slave_configure        = qla2xxx_slave_configure,
 112
 113         .slave_alloc            = qla2xxx_slave_alloc,
 114         .slave_destroy          = qla2xxx_slave_destroy,
 115         .this_id                = -1,
 116         .cmd_per_lun            = 3,
 117         .use_clustering         = ENABLE_CLUSTERING,
 118         .sg_tablesize           = SG_ALL,
 119
 120         /*
 121          * The RISC allows for each command to transfer (2^32-1) bytes of data,
 122          * which equates to 0x800000 sectors.
 123          */
 124         .max_sectors            = 0xFFFF,
 125 };
 126
 127 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
 128
 129 /* TODO Convert to inlines
 130  *
 131  * Timer routines
 132  */
 133 #define WATCH_INTERVAL          1       /* number of seconds */
 134
 135 static void qla2x00_timer(scsi_qla_host_t *);
 136
 137 static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
 138     void *, unsigned long);
 139 static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
 140 static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
 141
 142 static inline void
 143 qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
 144 {
 145         init_timer(&ha->timer);
 146         ha->timer.expires = jiffies + interval * HZ;
 147         ha->timer.data = (unsigned long)ha;
 148         ha->timer.function = (void (*)(unsigned long))func;
 149         add_timer(&ha->timer);
 150         ha->timer_active = 1;
 151 }
 152
 153 static inline void
 154 qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
 155 {
 156         mod_timer(&ha->timer, jiffies + interval * HZ);
 157 }
 158
 159 static __inline__ void
 160 qla2x00_stop_timer(scsi_qla_host_t *ha)
 161 {
 162         del_timer_sync(&ha->timer);
 163         ha->timer_active = 0;
 164 }
 165
 166 static int qla2x00_do_dpc(void *data);
 167
 168 static void qla2x00_rst_aen(scsi_qla_host_t *);
 169
 170 static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
 171 static void qla2x00_mem_free(scsi_qla_host_t *ha);
 172 static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
 173 static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
 174 static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
 175 static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
 176 void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
 177
 178 /* -------------------------------------------------------------------------- */
 179
 180 static char *
 181 qla2x00_pci_info_str(struct scsi_qla_host *ha, char *str)
 182 {
 183         static char *pci_bus_modes[] = {
 184                 "33", "66", "100", "133",
 185         };
 186         uint16_t pci_bus;
 187
 188         strcpy(str, "PCI");
 189         pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
 190         if (pci_bus) {
 191                 strcat(str, "-X (");
 192                 strcat(str, pci_bus_modes[pci_bus]);
 193         } else {
 194                 pci_bus = (ha->pci_attr & BIT_8) >> 8;
 195                 strcat(str, " (");
 196                 strcat(str, pci_bus_modes[pci_bus]);
 197         }
 198         strcat(str, " MHz)");
 199
 200         return (str);
 201 }
 202
 203 char *
 204 qla2x00_fw_version_str(struct scsi_qla_host *ha, char *str)
 205 {
 206         char un_str[10];
 207
 208         sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
 209             ha->fw_minor_version,
 210             ha->fw_subminor_version);
 211
 212         if (ha->fw_attributes & BIT_9) {
 213                 strcat(str, "FLX");
 214                 return (str);
 215         }
 216
 217         switch (ha->fw_attributes & 0xFF) {
 218         case 0x7:
 219                 strcat(str, "EF");
 220                 break;
 221         case 0x17:
 222                 strcat(str, "TP");
 223                 break;
 224         case 0x37:
 225                 strcat(str, "IP");
 226                 break;
 227         case 0x77:
 228                 strcat(str, "VI");
 229                 break;
 230         default:
 231                 sprintf(un_str, "(%x)", ha->fw_attributes);
 232                 strcat(str, un_str);
 233                 break;
 234         }
 235         if (ha->fw_attributes & 0x100)
 236                 strcat(str, "X");
 237
 238         return (str);
 239 }
 240
 241 /**************************************************************************
 242 * qla2x00_queuecommand
 243 *
 244 * Description:
 245 *     Queue a command to the controller.
 246 *
 247 * Input:
 248 *     cmd - pointer to Scsi cmd structure
 249 *     fn - pointer to Scsi done function
 250 *
 251 * Returns:
 252 *   0 - Always
 253 *
 254 * Note:
 255 * The mid-level driver tries to ensures that queuecommand never gets invoked
 256 * concurrently with itself or the interrupt handler (although the
 257 * interrupt handler may call this routine as part of request-completion
 258 * handling).
 259 **************************************************************************/
 260 static int
 261 qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 262 {
 263         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 264         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 265         srb_t *sp;
 266         int rval;
 267
 268         if (!fcport) {
 269                 cmd->result = DID_NO_CONNECT << 16;
 270                 goto qc_fail_command;
 271         }
 272
 273         if (atomic_read(&fcport->state) != FCS_ONLINE) {
 274                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
 275                     atomic_read(&ha->loop_state) == LOOP_DEAD) {
 276                         cmd->result = DID_NO_CONNECT << 16;
 277                         goto qc_fail_command;
 278                 }
 279                 goto qc_host_busy;
 280         }
 281
 282         spin_unlock_irq(ha->host->host_lock);
 283
 284         /* Allocate a command packet from the "sp" pool. */
 285         if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
 286                 goto qc_host_busy_lock;
 287         }
 288
 289         sp->ha = ha;
 290         sp->fcport = fcport;
 291         sp->cmd = cmd;
 292         sp->flags = 0;
 293
 294         CMD_SP(cmd) = (void *)sp;
 295         cmd->scsi_done = done;
 296
 297         rval = qla2x00_start_scsi(sp);
 298         if (rval != QLA_SUCCESS)
 299                 goto qc_host_busy_free_sp;
 300
 301         /* Manage unprocessed RIO/ZIO commands in response queue. */
 302         if (ha->flags.online && ha->flags.process_response_queue &&
 303             ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 304                 unsigned long flags;
 305
 306                 spin_lock_irqsave(&ha->hardware_lock, flags);
 307                 qla2x00_process_response_queue(ha);
 308                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 309         }
 310
 311         spin_lock_irq(ha->host->host_lock);
 312
 313         return 0;
 314
 315 qc_host_busy_free_sp:
 316         qla2x00_sp_free_dma(ha, sp);
 317         CMD_SP(cmd) = NULL;
 318         mempool_free(sp, ha->srb_mempool);
 319
 320 qc_host_busy_lock:
 321         spin_lock_irq(ha->host->host_lock);
 322
 323 qc_host_busy:
 324         return SCSI_MLQUEUE_HOST_BUSY;
 325
 326 qc_fail_command:
 327         done(cmd);
 328
 329         return 0;
 330 }
 331
 332 /*
 333  * qla2x00_eh_wait_on_command
 334  *    Waits for the command to be returned by the Firmware for some
 335  *    max time.
 336  *
 337  * Input:
 338  *    ha = actual ha whose done queue will contain the command
 339  *            returned by firmware.
 340  *    cmd = Scsi Command to wait on.
 341  *    flag = Abort/Reset(Bus or Device Reset)
 342  *
 343  * Return:
 344  *    Not Found : 0
 345  *    Found : 1
 346  */
 347 static int
 348 qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
 349 {
 350 #define ABORT_POLLING_PERIOD    HZ
 351 #define ABORT_WAIT_ITER         ((10 * HZ) / (ABORT_POLLING_PERIOD))
 352         unsigned long wait_iter = ABORT_WAIT_ITER;
 353         int ret = QLA_SUCCESS;
 354
 355         while (CMD_SP(cmd)) {
 356                 set_current_state(TASK_UNINTERRUPTIBLE);
 357                 schedule_timeout(ABORT_POLLING_PERIOD);
 358
 359                 if (--wait_iter)
 360                         break;
 361         }
 362         if (CMD_SP(cmd))
 363                 ret = QLA_FUNCTION_FAILED;
 364
 365         return ret;
 366 }
 367
 368 /*
 369  * qla2x00_wait_for_hba_online
 370  *    Wait till the HBA is online after going through
 371  *    <= MAX_RETRIES_OF_ISP_ABORT  or
 372  *    finally HBA is disabled ie marked offline
 373  *
 374  * Input:
 375  *     ha - pointer to host adapter structure
 376  *
 377  * Note:
 378  *    Does context switching-Release SPIN_LOCK
 379  *    (if any) before calling this routine.
 380  *
 381  * Return:
 382  *    Success (Adapter is online) : 0
 383  *    Failed  (Adapter is offline/disabled) : 1
 384  */
 385 static int
 386 qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
 387 {
 388         int      return_status;
 389         unsigned long wait_online;
 390
 391         wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
 392         while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
 393             test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
 394             test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
 395             ha->dpc_active) && time_before(jiffies, wait_online)) {
 396
 397                 msleep(1000);
 398         }
 399         if (ha->flags.online)
 400                 return_status = QLA_SUCCESS;
 401         else
 402                 return_status = QLA_FUNCTION_FAILED;
 403
 404         DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
 405
 406         return (return_status);
 407 }
 408
 409 /*
 410  * qla2x00_wait_for_loop_ready
 411  *    Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
 412  *    to be in LOOP_READY state.
 413  * Input:
 414  *     ha - pointer to host adapter structure
 415  *
 416  * Note:
 417  *    Does context switching-Release SPIN_LOCK
 418  *    (if any) before calling this routine.
 419  *
 420  *
 421  * Return:
 422  *    Success (LOOP_READY) : 0
 423  *    Failed  (LOOP_NOT_READY) : 1
 424  */
 425 static inline int
 426 qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
 427 {
 428         int      return_status = QLA_SUCCESS;
 429         unsigned long loop_timeout ;
 430
 431         /* wait for 5 min at the max for loop to be ready */
 432         loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);
 433
 434         while ((!atomic_read(&ha->loop_down_timer) &&
 435             atomic_read(&ha->loop_state) == LOOP_DOWN) ||
 436             atomic_read(&ha->loop_state) != LOOP_READY) {
 437                 msleep(1000);
 438                 if (time_after_eq(jiffies, loop_timeout)) {
 439                         return_status = QLA_FUNCTION_FAILED;
 440                         break;
 441                 }
 442         }
 443         return (return_status);
 444 }
 445
 446 /**************************************************************************
 447 * qla2xxx_eh_abort
 448 *
 449 * Description:
 450 *    The abort function will abort the specified command.
 451 *
 452 * Input:
 453 *    cmd = Linux SCSI command packet to be aborted.
 454 *
 455 * Returns:
 456 *    Either SUCCESS or FAILED.
 457 *
 458 * Note:
 459 **************************************************************************/
 460 int
 461 qla2xxx_eh_abort(struct scsi_cmnd *cmd)
 462 {
 463         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 464         srb_t *sp;
 465         int ret, i;
 466         unsigned int id, lun;
 467         unsigned long serial;
 468         unsigned long flags;
 469
 470         if (!CMD_SP(cmd))
 471                 return FAILED;
 472
 473         ret = FAILED;
 474
 475         id = cmd->device->id;
 476         lun = cmd->device->lun;
 477         serial = cmd->serial_number;
 478
 479         /* Check active list for command command. */
 480         spin_lock_irqsave(&ha->hardware_lock, flags);
 481         for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
 482                 sp = ha->outstanding_cmds[i];
 483
 484                 if (sp == NULL)
 485                         continue;
 486
 487                 if (sp->cmd != cmd)
 488                         continue;
 489
 490                 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
 491                     "sp->state=%x\n", __func__, ha->host_no, sp, serial,
 492                     sp->state));
 493                 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
 494
 495                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 496                 if (ha->isp_ops.abort_command(ha, sp)) {
 497                         DEBUG2(printk("%s(%ld): abort_command "
 498                             "mbx failed.\n", __func__, ha->host_no));
 499                 } else {
 500                         DEBUG3(printk("%s(%ld): abort_command "
 501                             "mbx success.\n", __func__, ha->host_no));
 502                         ret = SUCCESS;
 503                 }
 504                 spin_lock_irqsave(&ha->hardware_lock, flags);
 505
 506                 break;
 507         }
 508         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 509
 510         /* Wait for the command to be returned. */
 511         if (ret == SUCCESS) {
 512                 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
 513                         qla_printk(KERN_ERR, ha,
 514                             "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
 515                             "%x.\n", ha->host_no, id, lun, serial, ret);
 516                 }
 517         }
 518
 519         qla_printk(KERN_INFO, ha,
 520             "scsi(%ld:%d:%d): Abort command issued -- %lx %x.\n", ha->host_no,
 521             id, lun, serial, ret);
 522
 523         return ret;
 524 }
 525
 526 /**************************************************************************
 527 * qla2x00_eh_wait_for_pending_target_commands
 528 *
 529 * Description:
 530 *    Waits for all the commands to come back from the specified target.
 531 *
 532 * Input:
 533 *    ha - pointer to scsi_qla_host structure.
 534 *    t  - target
 535 * Returns:
 536 *    Either SUCCESS or FAILED.
 537 *
 538 * Note:
 539 **************************************************************************/
 540 static int
 541 qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
 542 {
 543         int     cnt;
 544         int     status;
 545         srb_t           *sp;
 546         struct scsi_cmnd *cmd;
 547         unsigned long flags;
 548
 549         status = 0;
 550
 551         /*
 552          * Waiting for all commands for the designated target in the active
 553          * array
 554          */
 555         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 556                 spin_lock_irqsave(&ha->hardware_lock, flags);
 557                 sp = ha->outstanding_cmds[cnt];
 558                 if (sp) {
 559                         cmd = sp->cmd;
 560                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 561                         if (cmd->device->id == t) {
 562                                 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
 563                                         status = 1;
 564                                         break;
 565                                 }
 566                         }
 567                 } else {
 568                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 569                 }
 570         }
 571         return (status);
 572 }
 573
 574
 575 /**************************************************************************
 576 * qla2xxx_eh_device_reset
 577 *
 578 * Description:
 579 *    The device reset function will reset the target and abort any
 580 *    executing commands.
 581 *
 582 *    NOTE: The use of SP is undefined within this context.  Do *NOT*
 583 *          attempt to use this value, even if you determine it is
 584 *          non-null.
 585 *
 586 * Input:
 587 *    cmd = Linux SCSI command packet of the command that cause the
 588 *          bus device reset.
 589 *
 590 * Returns:
 591 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 592 *
 593 **************************************************************************/
 594 int
 595 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
 596 {
 597         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 598         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 599         srb_t *sp;
 600         int ret;
 601         unsigned int id, lun;
 602         unsigned long serial;
 603
 604         ret = FAILED;
 605
 606         id = cmd->device->id;
 607         lun = cmd->device->lun;
 608         serial = cmd->serial_number;
 609
 610         sp = (srb_t *) CMD_SP(cmd);
 611         if (!sp || !fcport)
 612                 return ret;
 613
 614         qla_printk(KERN_INFO, ha,
 615             "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
 616
 617         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 618                 goto eh_dev_reset_done;
 619
 620         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 621                 if (qla2x00_device_reset(ha, fcport) == 0)
 622                         ret = SUCCESS;
 623
 624 #if defined(LOGOUT_AFTER_DEVICE_RESET)
 625                 if (ret == SUCCESS) {
 626                         if (fcport->flags & FC_FABRIC_DEVICE) {
 627                                 ha->isp_ops.fabric_logout(ha, fcport->loop_id);
 628                                 qla2x00_mark_device_lost(ha, fcport);
 629                         }
 630                 }
 631 #endif
 632         } else {
 633                 DEBUG2(printk(KERN_INFO
 634                     "%s failed: loop not ready\n",__func__);)
 635         }
 636
 637         if (ret == FAILED) {
 638                 DEBUG3(printk("%s(%ld): device reset failed\n",
 639                     __func__, ha->host_no));
 640                 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
 641                     __func__);
 642
 643                 goto eh_dev_reset_done;
 644         }
 645
 646         /*
 647          * If we are coming down the EH path, wait for all commands to
 648          * complete for the device.
 649          */
 650         if (cmd->device->host->eh_active) {
 651                 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
 652                         ret = FAILED;
 653
 654                 if (ret == FAILED) {
 655                         DEBUG3(printk("%s(%ld): failed while waiting for "
 656                             "commands\n", __func__, ha->host_no));
 657                         qla_printk(KERN_INFO, ha,
 658                             "%s: failed while waiting for commands\n",
 659                             __func__);
 660
 661                         goto eh_dev_reset_done;
 662                 }
 663         }
 664
 665         qla_printk(KERN_INFO, ha,
 666             "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
 667
 668 eh_dev_reset_done:
 669         return ret;
 670 }
 671
 672 /**************************************************************************
 673 * qla2x00_eh_wait_for_pending_commands
 674 *
 675 * Description:
 676 *    Waits for all the commands to come back from the specified host.
 677 *
 678 * Input:
 679 *    ha - pointer to scsi_qla_host structure.
 680 *
 681 * Returns:
 682 *    1 : SUCCESS
 683 *    0 : FAILED
 684 *
 685 * Note:
 686 **************************************************************************/
 687 static int
 688 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
 689 {
 690         int     cnt;
 691         int     status;
 692         srb_t           *sp;
 693         struct scsi_cmnd *cmd;
 694         unsigned long flags;
 695
 696         status = 1;
 697
 698         /*
 699          * Waiting for all commands for the designated target in the active
 700          * array
 701          */
 702         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 703                 spin_lock_irqsave(&ha->hardware_lock, flags);
 704                 sp = ha->outstanding_cmds[cnt];
 705                 if (sp) {
 706                         cmd = sp->cmd;
 707                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 708                         status = qla2x00_eh_wait_on_command(ha, cmd);
 709                         if (status == 0)
 710                                 break;
 711                 }
 712                 else {
 713                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 714                 }
 715         }
 716         return (status);
 717 }
 718
 719
 720 /**************************************************************************
 721 * qla2xxx_eh_bus_reset
 722 *
 723 * Description:
 724 *    The bus reset function will reset the bus and abort any executing
 725 *    commands.
 726 *
 727 * Input:
 728 *    cmd = Linux SCSI command packet of the command that cause the
 729 *          bus reset.
 730 *
 731 * Returns:
 732 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 733 *
 734 **************************************************************************/
 735 int
 736 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
 737 {
 738         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 739         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 740         srb_t *sp;
 741         int ret;
 742         unsigned int id, lun;
 743         unsigned long serial;
 744
 745         ret = FAILED;
 746
 747         id = cmd->device->id;
 748         lun = cmd->device->lun;
 749         serial = cmd->serial_number;
 750
 751         sp = (srb_t *) CMD_SP(cmd);
 752         if (!sp || !fcport)
 753                 return ret;
 754
 755         qla_printk(KERN_INFO, ha,
 756             "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
 757
 758         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
 759                 DEBUG2(printk("%s failed:board disabled\n",__func__));
 760                 goto eh_bus_reset_done;
 761         }
 762
 763         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 764                 if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
 765                         ret = SUCCESS;
 766         }
 767         if (ret == FAILED)
 768                 goto eh_bus_reset_done;
 769
 770         /* Waiting for our command in done_queue to be returned to OS.*/
 771         if (cmd->device->host->eh_active)
 772                 if (!qla2x00_eh_wait_for_pending_commands(ha))
 773                         ret = FAILED;
 774
 775 eh_bus_reset_done:
 776         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 777             (ret == FAILED) ? "failed" : "succeded");
 778
 779         return ret;
 780 }
 781
 782 /**************************************************************************
 783 * qla2xxx_eh_host_reset
 784 *
 785 * Description:
 786 *    The reset function will reset the Adapter.
 787 *
 788 * Input:
 789 *      cmd = Linux SCSI command packet of the command that cause the
 790 *            adapter reset.
 791 *
 792 * Returns:
 793 *      Either SUCCESS or FAILED.
 794 *
 795 * Note:
 796 **************************************************************************/
 797 int
 798 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
 799 {
 800         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 801         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 802         srb_t *sp;
 803         int ret;
 804         unsigned int id, lun;
 805         unsigned long serial;
 806
 807         ret = FAILED;
 808
 809         id = cmd->device->id;
 810         lun = cmd->device->lun;
 811         serial = cmd->serial_number;
 812
 813         sp = (srb_t *) CMD_SP(cmd);
 814         if (!sp || !fcport)
 815                 return ret;
 816
 817         qla_printk(KERN_INFO, ha,
 818             "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
 819
 820         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 821                 goto eh_host_reset_lock;
 822
 823         /*
 824          * Fixme-may be dpc thread is active and processing
 825          * loop_resync,so wait a while for it to
 826          * be completed and then issue big hammer.Otherwise
 827          * it may cause I/O failure as big hammer marks the
 828          * devices as lost kicking of the port_down_timer
 829          * while dpc is stuck for the mailbox to complete.
 830          */
 831         qla2x00_wait_for_loop_ready(ha);
 832         set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 833         if (qla2x00_abort_isp(ha)) {
 834                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 835                 /* failed. schedule dpc to try */
 836                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 837
 838                 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 839                         goto eh_host_reset_lock;
 840         }
 841         clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 842
 843         /* Waiting for our command in done_queue to be returned to OS.*/
 844         if (qla2x00_eh_wait_for_pending_commands(ha))
 845                 ret = SUCCESS;
 846
 847 eh_host_reset_lock:
 848         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 849             (ret == FAILED) ? "failed" : "succeded");
 850
 851         return ret;
 852 }
 853
 854 /*
 855 * qla2x00_loop_reset
 856 *      Issue loop reset.
 857 *
 858 * Input:
 859 *      ha = adapter block pointer.
 860 *
 861 * Returns:
 862 *      0 = success
 863 */
 864 static int
 865 qla2x00_loop_reset(scsi_qla_host_t *ha)
 866 {
 867         int status = QLA_SUCCESS;
 868         struct fc_port *fcport;
 869
 870         if (ha->flags.enable_lip_reset) {
 871                 status = qla2x00_lip_reset(ha);
 872         }
 873
 874         if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
 875                 list_for_each_entry(fcport, &ha->fcports, list) {
 876                         if (fcport->port_type != FCT_TARGET)
 877                                 continue;
 878
 879                         status = qla2x00_target_reset(ha, fcport);
 880                         if (status != QLA_SUCCESS)
 881                                 break;
 882                 }
 883         }
 884
 885         if (status == QLA_SUCCESS &&
 886                 ((!ha->flags.enable_target_reset &&
 887                   !ha->flags.enable_lip_reset) ||
 888                 ha->flags.enable_lip_full_login)) {
 889
 890                 status = qla2x00_full_login_lip(ha);
 891         }
 892
 893         /* Issue marker command only when we are going to start the I/O */
 894         ha->marker_needed = 1;
 895
 896         if (status) {
 897                 /* Empty */
 898                 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
 899                                 __func__,
 900                                 ha->host_no);)
 901         } else {
 902                 /* Empty */
 903                 DEBUG3(printk("%s(%ld): exiting normally.\n",
 904                                 __func__,
 905                                 ha->host_no);)
 906         }
 907
 908         return(status);
 909 }
 910
 911 /*
 912  * qla2x00_device_reset
 913  *      Issue bus device reset message to the target.
 914  *
 915  * Input:
 916  *      ha = adapter block pointer.
 917  *      t = SCSI ID.
 918  *      TARGET_QUEUE_LOCK must be released.
 919  *      ADAPTER_STATE_LOCK must be released.
 920  *
 921  * Context:
 922  *      Kernel context.
 923  */
 924 static int
 925 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
 926 {
 927         /* Abort Target command will clear Reservation */
 928         return ha->isp_ops.abort_target(reset_fcport);
 929 }
 930
 931 static int
 932 qla2xxx_slave_alloc(struct scsi_device *sdev)
 933 {
 934         scsi_qla_host_t *ha = to_qla_host(sdev->host);
 935         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 936         fc_port_t *fcport;
 937         int found;
 938
 939         if (!rport)
 940                 return -ENXIO;
 941
 942         found = 0;
 943         list_for_each_entry(fcport, &ha->fcports, list) {
 944                 if (rport->port_name ==
 945                     be64_to_cpu(*(uint64_t *)fcport->port_name)) {
 946                         found++;
 947                         break;
 948                 }
 949         }
 950         if (!found)
 951                 return -ENXIO;
 952
 953         sdev->hostdata = fcport;
 954
 955         return 0;
 956 }
 957
 958 static int
 959 qla2xxx_slave_configure(struct scsi_device *sdev)
 960 {
 961         scsi_qla_host_t *ha = to_qla_host(sdev->host);
 962         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
 963
 964         if (sdev->tagged_supported)
 965                 scsi_activate_tcq(sdev, 32);
 966         else
 967                 scsi_deactivate_tcq(sdev, 32);
 968
 969         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
 970
 971         return 0;
 972 }
 973
 974 static void
 975 qla2xxx_slave_destroy(struct scsi_device *sdev)
 976 {
 977         sdev->hostdata = NULL;
 978 }
 979
 980 /**
 981  * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
 982  * @ha: HA context
 983  *
 984  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
 985  * supported addressing method.
 986  */
 987 static void
 988 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
 989 {
 990         /* Assume 32bit DMA address */
 991         ha->flags.enable_64bit_addressing = 0;
 992
 993         /*
 994          * Given the two variants pci_set_dma_mask(), allow the compiler to
 995          * assist in setting the proper dma mask.
 996          */
 997         if (sizeof(dma_addr_t) > 4) {
 998                 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
 999                         ha->flags.enable_64bit_addressing = 1;
1000                         ha->isp_ops.calc_req_entries = qla2x00_calc_iocbs_64;
1001                         ha->isp_ops.build_iocbs = qla2x00_build_scsi_iocbs_64;
1002
1003                         if (pci_set_consistent_dma_mask(ha->pdev,
1004                             DMA_64BIT_MASK)) {
1005                                 qla_printk(KERN_DEBUG, ha,
1006                                     "Failed to set 64 bit PCI consistent mask; "
1007                                     "using 32 bit.\n");
1008                                 pci_set_consistent_dma_mask(ha->pdev,
1009                                     DMA_32BIT_MASK);
1010                         }
1011                 } else {
1012                         qla_printk(KERN_DEBUG, ha,
1013                             "Failed to set 64 bit PCI DMA mask, falling back "
1014                             "to 32 bit MASK.\n");
1015                         pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1016                 }
1017         } else {
1018                 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1019         }
1020 }
1021
1022 static int
1023 qla2x00_iospace_config(scsi_qla_host_t *ha)
1024 {
1025         unsigned long   pio, pio_len, pio_flags;
1026         unsigned long   mmio, mmio_len, mmio_flags;
1027
1028         /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1029         pio = pci_resource_start(ha->pdev, 0);
1030         pio_len = pci_resource_len(ha->pdev, 0);
1031         pio_flags = pci_resource_flags(ha->pdev, 0);
1032         if (pio_flags & IORESOURCE_IO) {
1033                 if (pio_len < MIN_IOBASE_LEN) {
1034                         qla_printk(KERN_WARNING, ha,
1035                             "Invalid PCI I/O region size (%s)...\n",
1036                                 pci_name(ha->pdev));
1037                         pio = 0;
1038                 }
1039         } else {
1040                 qla_printk(KERN_WARNING, ha,
1041                     "region #0 not a PIO resource (%s)...\n",
1042                     pci_name(ha->pdev));
1043                 pio = 0;
1044         }
1045
1046         /* Use MMIO operations for all accesses. */
1047         mmio = pci_resource_start(ha->pdev, 1);
1048         mmio_len = pci_resource_len(ha->pdev, 1);
1049         mmio_flags = pci_resource_flags(ha->pdev, 1);
1050
1051         if (!(mmio_flags & IORESOURCE_MEM)) {
1052                 qla_printk(KERN_ERR, ha,
1053                     "region #0 not an MMIO resource (%s), aborting\n",
1054                     pci_name(ha->pdev));
1055                 goto iospace_error_exit;
1056         }
1057         if (mmio_len < MIN_IOBASE_LEN) {
1058                 qla_printk(KERN_ERR, ha,
1059                     "Invalid PCI mem region size (%s), aborting\n",
1060                         pci_name(ha->pdev));
1061                 goto iospace_error_exit;
1062         }
1063
1064         if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1065                 qla_printk(KERN_WARNING, ha,
1066                     "Failed to reserve PIO/MMIO regions (%s)\n",
1067                     pci_name(ha->pdev));
1068
1069                 goto iospace_error_exit;
1070         }
1071
1072         ha->pio_address = pio;
1073         ha->pio_length = pio_len;
1074         ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1075         if (!ha->iobase) {
1076                 qla_printk(KERN_ERR, ha,
1077                     "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1078
1079                 goto iospace_error_exit;
1080         }
1081
1082         return (0);
1083
1084 iospace_error_exit:
1085         return (-ENOMEM);
1086 }
1087
1088 static void
1089 qla2x00_enable_intrs(scsi_qla_host_t *ha)
1090 {
1091         unsigned long flags = 0;
1092         device_reg_t __iomem *reg = ha->iobase;
1093
1094         spin_lock_irqsave(&ha->hardware_lock, flags);
1095         ha->interrupts_on = 1;
1096         /* enable risc and host interrupts */
1097         WRT_REG_WORD(&reg->ictrl, ICR_EN_INT | ICR_EN_RISC);
1098         RD_REG_WORD(&reg->ictrl);
1099         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1100
1101 }
1102
1103 static void
1104 qla2x00_disable_intrs(scsi_qla_host_t *ha)
1105 {
1106         unsigned long flags = 0;
1107         device_reg_t __iomem *reg = ha->iobase;
1108
1109         spin_lock_irqsave(&ha->hardware_lock, flags);
1110         ha->interrupts_on = 0;
1111         /* disable risc and host interrupts */
1112         WRT_REG_WORD(&reg->ictrl, 0);
1113         RD_REG_WORD(&reg->ictrl);
1114         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1115 }
1116
1117 /*
1118  * PCI driver interface
1119  */
1120 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1121 {
1122         int     ret = -ENODEV;
1123         device_reg_t __iomem *reg;
1124         struct Scsi_Host *host;
1125         scsi_qla_host_t *ha;
1126         unsigned long   flags = 0;
1127         unsigned long   wait_switch = 0;
1128         char pci_info[20];
1129         char fw_str[30];
1130         fc_port_t *fcport;
1131
1132         if (pci_enable_device(pdev))
1133                 goto probe_out;
1134
1135         host = scsi_host_alloc(&qla2x00_driver_template,
1136             sizeof(scsi_qla_host_t));
1137         if (host == NULL) {
1138                 printk(KERN_WARNING
1139                     "qla2xxx: Couldn't allocate host from scsi layer!\n");
1140                 goto probe_disable_device;
1141         }
1142
1143         /* Clear our data area */
1144         ha = (scsi_qla_host_t *)host->hostdata;
1145         memset(ha, 0, sizeof(scsi_qla_host_t));
1146
1147         ha->pdev = pdev;
1148         ha->host = host;
1149         ha->host_no = host->host_no;
1150         ha->brd_info = brd_info;
1151         sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1152
1153         /* Configure PCI I/O space */
1154         ret = qla2x00_iospace_config(ha);
1155         if (ret)
1156                 goto probe_failed;
1157
1158         /* Sanitize the information from PCI BIOS. */
1159         host->irq = pdev->irq;
1160
1161         qla_printk(KERN_INFO, ha,
1162             "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1163             host->irq, ha->iobase);
1164
1165         spin_lock_init(&ha->hardware_lock);
1166
1167         ha->prev_topology = 0;
1168         ha->ports = MAX_BUSES;
1169
1170         /* Assign ISP specific operations. */
1171         ha->isp_ops.pci_config          = qla2100_pci_config;
1172         ha->isp_ops.reset_chip          = qla2x00_reset_chip;
1173         ha->isp_ops.chip_diag           = qla2x00_chip_diag;
1174         ha->isp_ops.config_rings        = qla2x00_config_rings;
1175         ha->isp_ops.reset_adapter       = qla2x00_reset_adapter;
1176         ha->isp_ops.nvram_config        = qla2x00_nvram_config;
1177         ha->isp_ops.update_fw_options   = qla2x00_update_fw_options;
1178         ha->isp_ops.pci_info_str        = qla2x00_pci_info_str;
1179         ha->isp_ops.fw_version_str      = qla2x00_fw_version_str;
1180         ha->isp_ops.intr_handler        = qla2100_intr_handler;
1181         ha->isp_ops.enable_intrs        = qla2x00_enable_intrs;
1182         ha->isp_ops.disable_intrs       = qla2x00_disable_intrs;
1183         ha->isp_ops.abort_command       = qla2x00_abort_command;
1184         ha->isp_ops.abort_target        = qla2x00_abort_target;
1185         ha->isp_ops.fabric_login        = qla2x00_login_fabric;
1186         ha->isp_ops.fabric_logout       = qla2x00_fabric_logout;
1187         ha->isp_ops.calc_req_entries    = qla2x00_calc_iocbs_32;
1188         ha->isp_ops.build_iocbs         = qla2x00_build_scsi_iocbs_32;
1189         ha->isp_ops.prep_ms_iocb        = qla2x00_prep_ms_iocb;
1190         ha->isp_ops.fw_dump             = qla2100_fw_dump;
1191         ha->isp_ops.ascii_fw_dump       = qla2100_ascii_fw_dump;
1192         if (IS_QLA2100(ha)) {
1193                 host->max_id = MAX_TARGETS_2100;
1194                 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1195                 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1196                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1197                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1198                 host->sg_tablesize = 32;
1199                 ha->gid_list_info_size = 4;
1200         } else if (IS_QLA2200(ha)) {
1201                 host->max_id = MAX_TARGETS_2200;
1202                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1203                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1204                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1205                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1206                 ha->gid_list_info_size = 4;
1207         } else /*if (IS_QLA2300(ha))*/ {
1208                 host->max_id = MAX_TARGETS_2200;
1209                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1210                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1211                 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1212                 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1213                 ha->isp_ops.pci_config = qla2300_pci_config;
1214                 ha->isp_ops.intr_handler = qla2300_intr_handler;
1215                 ha->isp_ops.fw_dump = qla2300_fw_dump;
1216                 ha->isp_ops.ascii_fw_dump = qla2300_ascii_fw_dump;
1217                 ha->gid_list_info_size = 6;
1218         }
1219         host->can_queue = ha->request_q_length + 128;
1220
1221         /* load the F/W, read paramaters, and init the H/W */
1222         ha->instance = num_hosts;
1223
1224         init_MUTEX(&ha->mbx_cmd_sem);
1225         init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1226
1227         INIT_LIST_HEAD(&ha->list);
1228         INIT_LIST_HEAD(&ha->fcports);
1229         INIT_LIST_HEAD(&ha->rscn_fcports);
1230
1231         /*
1232          * These locks are used to prevent more than one CPU
1233          * from modifying the queue at the same time. The
1234          * higher level "host_lock" will reduce most
1235          * contention for these locks.
1236          */
1237         spin_lock_init(&ha->mbx_reg_lock);
1238
1239         ha->dpc_pid = -1;
1240         init_completion(&ha->dpc_inited);
1241         init_completion(&ha->dpc_exited);
1242
1243         qla2x00_config_dma_addressing(ha);
1244         if (qla2x00_mem_alloc(ha)) {
1245                 qla_printk(KERN_WARNING, ha,
1246                     "[ERROR] Failed to allocate memory for adapter\n");
1247
1248                 ret = -ENOMEM;
1249                 goto probe_failed;
1250         }
1251
1252         if (qla2x00_initialize_adapter(ha) &&
1253             !(ha->device_flags & DFLG_NO_CABLE)) {
1254
1255                 qla_printk(KERN_WARNING, ha,
1256                     "Failed to initialize adapter\n");
1257
1258                 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1259                     "Adapter flags %x.\n",
1260                     ha->host_no, ha->device_flags));
1261
1262                 ret = -ENODEV;
1263                 goto probe_failed;
1264         }
1265
1266         /*
1267          * Startup the kernel thread for this host adapter
1268          */
1269         ha->dpc_should_die = 0;
1270         ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1271         if (ha->dpc_pid < 0) {
1272                 qla_printk(KERN_WARNING, ha,
1273                     "Unable to start DPC thread!\n");
1274
1275                 ret = -ENODEV;
1276                 goto probe_failed;
1277         }
1278         wait_for_completion(&ha->dpc_inited);
1279
1280         host->this_id = 255;
1281         host->cmd_per_lun = 3;
1282         host->unique_id = ha->instance;
1283         host->max_cmd_len = MAX_CMDSZ;
1284         host->max_channel = ha->ports - 1;
1285         host->max_lun = MAX_LUNS;
1286         host->transportt = qla2xxx_transport_template;
1287
1288         ret = request_irq(host->irq, ha->isp_ops.intr_handler,
1289             SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1290         if (ret) {
1291                 qla_printk(KERN_WARNING, ha,
1292                     "Failed to reserve interrupt %d already in use.\n",
1293                     host->irq);
1294                 goto probe_failed;
1295         }
1296
1297         /* Initialized the timer */
1298         qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1299
1300         DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1301             ha->host_no, ha));
1302
1303         reg = ha->iobase;
1304
1305         ha->isp_ops.disable_intrs(ha);
1306
1307         /* Ensure mailbox registers are free. */
1308         spin_lock_irqsave(&ha->hardware_lock, flags);
1309         WRT_REG_WORD(&reg->semaphore, 0);
1310         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1311         WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1312
1313         /* Enable proper parity */
1314         if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1315                 if (IS_QLA2300(ha))
1316                         /* SRAM parity */
1317                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1318                 else
1319                         /* SRAM, Instruction RAM and GP RAM parity */
1320                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1321         }
1322         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1323
1324         ha->isp_ops.enable_intrs(ha);
1325
1326         /* v2.19.5b6 */
1327         /*
1328          * Wait around max loop_reset_delay secs for the devices to come
1329          * on-line. We don't want Linux scanning before we are ready.
1330          *
1331          */
1332         for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1333             time_before(jiffies,wait_switch) &&
1334              !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1335              && (ha->device_flags & SWITCH_FOUND) ;) {
1336
1337                 qla2x00_check_fabric_devices(ha);
1338
1339                 msleep(10);
1340         }
1341
1342         pci_set_drvdata(pdev, ha);
1343         ha->flags.init_done = 1;
1344         num_hosts++;
1345
1346         ret = scsi_add_host(host, &pdev->dev);
1347         if (ret)
1348                 goto probe_failed;
1349
1350         qla2x00_alloc_sysfs_attr(ha);
1351
1352         qla2x00_init_host_attr(ha);
1353
1354         qla_printk(KERN_INFO, ha, "\n"
1355             " QLogic Fibre Channel HBA Driver: %s\n"
1356             "  QLogic %s - %s\n"
1357             "  %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1358             ha->model_number, ha->model_desc ? ha->model_desc: "",
1359             ha->brd_info->isp_name, ha->isp_ops.pci_info_str(ha, pci_info),
1360             pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1361             ha->host_no, ha->isp_ops.fw_version_str(ha, fw_str));
1362
1363         /* Go with fc_rport registration. */
1364         list_for_each_entry(fcport, &ha->fcports, list)
1365                 qla2x00_reg_remote_port(ha, fcport);
1366
1367         return 0;
1368
1369 probe_failed:
1370         fc_remove_host(ha->host);
1371
1372         qla2x00_free_device(ha);
1373
1374         scsi_host_put(host);
1375
1376 probe_disable_device:
1377         pci_disable_device(pdev);
1378
1379 probe_out:
1380         return ret;
1381 }
1382 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1383
1384 void qla2x00_remove_one(struct pci_dev *pdev)
1385 {
1386         scsi_qla_host_t *ha;
1387
1388         ha = pci_get_drvdata(pdev);
1389
1390         qla2x00_free_sysfs_attr(ha);
1391
1392         fc_remove_host(ha->host);
1393
1394         scsi_remove_host(ha->host);
1395
1396         qla2x00_free_device(ha);
1397
1398         scsi_host_put(ha->host);
1399
1400         pci_set_drvdata(pdev, NULL);
1401 }
1402 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1403
1404 static void
1405 qla2x00_free_device(scsi_qla_host_t *ha)
1406 {
1407         int ret;
1408
1409         /* Abort any outstanding IO descriptors. */
1410         if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1411                 qla2x00_cancel_io_descriptors(ha);
1412
1413         /* turn-off interrupts on the card */
1414         if (ha->interrupts_on)
1415                 ha->isp_ops.disable_intrs(ha);
1416
1417         /* Disable timer */
1418         if (ha->timer_active)
1419                 qla2x00_stop_timer(ha);
1420
1421         /* Kill the kernel thread for this host */
1422         if (ha->dpc_pid >= 0) {
1423                 ha->dpc_should_die = 1;
1424                 wmb();
1425                 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1426                 if (ret) {
1427                         qla_printk(KERN_ERR, ha,
1428                             "Unable to signal DPC thread -- (%d)\n", ret);
1429
1430                         /* TODO: SOMETHING MORE??? */
1431                 } else {
1432                         wait_for_completion(&ha->dpc_exited);
1433                 }
1434         }
1435
1436         qla2x00_mem_free(ha);
1437
1438
1439         ha->flags.online = 0;
1440
1441         /* Detach interrupts */
1442         if (ha->pdev->irq)
1443                 free_irq(ha->pdev->irq, ha);
1444
1445         /* release io space registers  */
1446         if (ha->iobase)
1447                 iounmap(ha->iobase);
1448         pci_release_regions(ha->pdev);
1449
1450         pci_disable_device(ha->pdev);
1451 }
1452
1453 /*
1454  * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1455  *
1456  * Input: ha = adapter block pointer.  fcport = port structure pointer.
1457  *
1458  * Return: None.
1459  *
1460  * Context:
1461  */
1462 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1463     int do_login)
1464 {
1465         if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1466                 fc_remote_port_block(fcport->rport);
1467         /*
1468          * We may need to retry the login, so don't change the state of the
1469          * port but do the retries.
1470          */
1471         if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1472                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1473
1474         if (!do_login)
1475                 return;
1476
1477         if (fcport->login_retry == 0) {
1478                 fcport->login_retry = ha->login_retry_count;
1479                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1480
1481                 DEBUG(printk("scsi(%ld): Port login retry: "
1482                     "%02x%02x%02x%02x%02x%02x%02x%02x, "
1483                     "id = 0x%04x retry cnt=%d\n",
1484                     ha->host_no,
1485                     fcport->port_name[0],
1486                     fcport->port_name[1],
1487                     fcport->port_name[2],
1488                     fcport->port_name[3],
1489                     fcport->port_name[4],
1490                     fcport->port_name[5],
1491                     fcport->port_name[6],
1492                     fcport->port_name[7],
1493                     fcport->loop_id,
1494                     fcport->login_retry));
1495         }
1496 }
1497
1498 /*
1499  * qla2x00_mark_all_devices_lost
1500  *      Updates fcport state when device goes offline.
1501  *
1502  * Input:
1503  *      ha = adapter block pointer.
1504  *      fcport = port structure pointer.
1505  *
1506  * Return:
1507  *      None.
1508  *
1509  * Context:
1510  */
1511 void
1512 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1513 {
1514         fc_port_t *fcport;
1515
1516         list_for_each_entry(fcport, &ha->fcports, list) {
1517                 if (fcport->port_type != FCT_TARGET)
1518                         continue;
1519
1520                 /*
1521                  * No point in marking the device as lost, if the device is
1522                  * already DEAD.
1523                  */
1524                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1525                         continue;
1526                 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1527                         fc_remote_port_block(fcport->rport);
1528                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1529         }
1530 }
1531
1532 /*
1533 * qla2x00_mem_alloc
1534 *      Allocates adapter memory.
1535 *
1536 * Returns:
1537 *      0  = success.
1538 *      1  = failure.
1539 */
1540 static uint8_t
1541 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1542 {
1543         char    name[16];
1544         uint8_t   status = 1;
1545         int     retry= 10;
1546
1547         do {
1548                 /*
1549                  * This will loop only once if everything goes well, else some
1550                  * number of retries will be performed to get around a kernel
1551                  * bug where available mem is not allocated until after a
1552                  * little delay and a retry.
1553                  */
1554                 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1555                     (ha->request_q_length + 1) * sizeof(request_t),
1556                     &ha->request_dma, GFP_KERNEL);
1557                 if (ha->request_ring == NULL) {
1558                         qla_printk(KERN_WARNING, ha,
1559                             "Memory Allocation failed - request_ring\n");
1560
1561                         qla2x00_mem_free(ha);
1562                         msleep(100);
1563
1564                         continue;
1565                 }
1566
1567                 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1568                     (ha->response_q_length + 1) * sizeof(response_t),
1569                     &ha->response_dma, GFP_KERNEL);
1570                 if (ha->response_ring == NULL) {
1571                         qla_printk(KERN_WARNING, ha,
1572                             "Memory Allocation failed - response_ring\n");
1573
1574                         qla2x00_mem_free(ha);
1575                         msleep(100);
1576
1577                         continue;
1578                 }
1579
1580                 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1581                     &ha->gid_list_dma, GFP_KERNEL);
1582                 if (ha->gid_list == NULL) {
1583                         qla_printk(KERN_WARNING, ha,
1584                             "Memory Allocation failed - gid_list\n");
1585
1586                         qla2x00_mem_free(ha);
1587                         msleep(100);
1588
1589                         continue;
1590                 }
1591
1592                 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1593                     sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1594                 if (ha->rlc_rsp == NULL) {
1595                         qla_printk(KERN_WARNING, ha,
1596                                 "Memory Allocation failed - rlc");
1597
1598                         qla2x00_mem_free(ha);
1599                         msleep(100);
1600
1601                         continue;
1602                 }
1603
1604                 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1605                 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1606                     DMA_POOL_SIZE, 8, 0);
1607                 if (ha->s_dma_pool == NULL) {
1608                         qla_printk(KERN_WARNING, ha,
1609                             "Memory Allocation failed - s_dma_pool\n");
1610
1611                         qla2x00_mem_free(ha);
1612                         msleep(100);
1613
1614                         continue;
1615                 }
1616
1617                 /* get consistent memory allocated for init control block */
1618                 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1619                     &ha->init_cb_dma);
1620                 if (ha->init_cb == NULL) {
1621                         qla_printk(KERN_WARNING, ha,
1622                             "Memory Allocation failed - init_cb\n");
1623
1624                         qla2x00_mem_free(ha);
1625                         msleep(100);
1626
1627                         continue;
1628                 }
1629                 memset(ha->init_cb, 0, sizeof(init_cb_t));
1630
1631                 /* Get consistent memory allocated for Get Port Database cmd */
1632                 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1633                     &ha->iodesc_pd_dma);
1634                 if (ha->iodesc_pd == NULL) {
1635                         /* error */
1636                         qla_printk(KERN_WARNING, ha,
1637                             "Memory Allocation failed - iodesc_pd\n");
1638
1639                         qla2x00_mem_free(ha);
1640                         msleep(100);
1641
1642                         continue;
1643                 }
1644                 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1645
1646                 /* Allocate ioctl related memory. */
1647                 if (qla2x00_alloc_ioctl_mem(ha)) {
1648                         qla_printk(KERN_WARNING, ha,
1649                             "Memory Allocation failed - ioctl_mem\n");
1650
1651                         qla2x00_mem_free(ha);
1652                         msleep(100);
1653
1654                         continue;
1655                 }
1656
1657                 if (qla2x00_allocate_sp_pool(ha)) {
1658                         qla_printk(KERN_WARNING, ha,
1659                             "Memory Allocation failed - "
1660                             "qla2x00_allocate_sp_pool()\n");
1661
1662                         qla2x00_mem_free(ha);
1663                         msleep(100);
1664
1665                         continue;
1666                 }
1667
1668                 /* Allocate memory for SNS commands */
1669                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1670                         /* Get consistent memory allocated for SNS commands */
1671                         ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1672                             sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1673                             GFP_KERNEL);
1674                         if (ha->sns_cmd == NULL) {
1675                                 /* error */
1676                                 qla_printk(KERN_WARNING, ha,
1677                                     "Memory Allocation failed - sns_cmd\n");
1678
1679                                 qla2x00_mem_free(ha);
1680                                 msleep(100);
1681
1682                                 continue;
1683                         }
1684                         memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1685                 } else {
1686                         /* Get consistent memory allocated for MS IOCB */
1687                         ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1688                             &ha->ms_iocb_dma);
1689                         if (ha->ms_iocb == NULL) {
1690                                 /* error */
1691                                 qla_printk(KERN_WARNING, ha,
1692                                     "Memory Allocation failed - ms_iocb\n");
1693
1694                                 qla2x00_mem_free(ha);
1695                                 msleep(100);
1696
1697                                 continue;
1698                         }
1699                         memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1700
1701                         /*
1702                          * Get consistent memory allocated for CT SNS
1703                          * commands
1704                          */
1705                         ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1706                             sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1707                             GFP_KERNEL);
1708                         if (ha->ct_sns == NULL) {
1709                                 /* error */
1710                                 qla_printk(KERN_WARNING, ha,
1711                                     "Memory Allocation failed - ct_sns\n");
1712
1713                                 qla2x00_mem_free(ha);
1714                                 msleep(100);
1715
1716                                 continue;
1717                         }
1718                         memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1719                 }
1720
1721                 /* Done all allocations without any error. */
1722                 status = 0;
1723
1724         } while (retry-- && status != 0);
1725
1726         if (status) {
1727                 printk(KERN_WARNING
1728                         "%s(): **** FAILED ****\n", __func__);
1729         }
1730
1731         return(status);
1732 }
1733
1734 /*
1735 * qla2x00_mem_free
1736 *      Frees all adapter allocated memory.
1737 *
1738 * Input:
1739 *      ha = adapter block pointer.
1740 */
1741 static void
1742 qla2x00_mem_free(scsi_qla_host_t *ha)
1743 {
1744         struct list_head        *fcpl, *fcptemp;
1745         fc_port_t       *fcport;
1746         unsigned long   wtime;/* max wait time if mbx cmd is busy. */
1747
1748         if (ha == NULL) {
1749                 /* error */
1750                 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1751                 return;
1752         }
1753
1754         /* Make sure all other threads are stopped. */
1755         wtime = 60 * HZ;
1756         while (ha->dpc_wait && wtime) {
1757                 set_current_state(TASK_INTERRUPTIBLE);
1758                 wtime = schedule_timeout(wtime);
1759         }
1760
1761         /* free ioctl memory */
1762         qla2x00_free_ioctl_mem(ha);
1763
1764         /* free sp pool */
1765         qla2x00_free_sp_pool(ha);
1766
1767         if (ha->sns_cmd)
1768                 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1769                     ha->sns_cmd, ha->sns_cmd_dma);
1770
1771         if (ha->ct_sns)
1772                 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1773                     ha->ct_sns, ha->ct_sns_dma);
1774
1775         if (ha->ms_iocb)
1776                 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1777
1778         if (ha->iodesc_pd)
1779                 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1780
1781         if (ha->init_cb)
1782                 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1783
1784         if (ha->s_dma_pool)
1785                 dma_pool_destroy(ha->s_dma_pool);
1786
1787         if (ha->rlc_rsp)
1788                 dma_free_coherent(&ha->pdev->dev,
1789                     sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1790                     ha->rlc_rsp_dma);
1791
1792         if (ha->gid_list)
1793                 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1794                     ha->gid_list_dma);
1795
1796         if (ha->response_ring)
1797                 dma_free_coherent(&ha->pdev->dev,
1798                     (ha->response_q_length + 1) * sizeof(response_t),
1799                     ha->response_ring, ha->response_dma);
1800
1801         if (ha->request_ring)
1802                 dma_free_coherent(&ha->pdev->dev,
1803                     (ha->request_q_length + 1) * sizeof(request_t),
1804                     ha->request_ring, ha->request_dma);
1805
1806         ha->sns_cmd = NULL;
1807         ha->sns_cmd_dma = 0;
1808         ha->ct_sns = NULL;
1809         ha->ct_sns_dma = 0;
1810         ha->ms_iocb = NULL;
1811         ha->ms_iocb_dma = 0;
1812         ha->iodesc_pd = NULL;
1813         ha->iodesc_pd_dma = 0;
1814         ha->init_cb = NULL;
1815         ha->init_cb_dma = 0;
1816
1817         ha->s_dma_pool = NULL;
1818
1819         ha->rlc_rsp = NULL;
1820         ha->rlc_rsp_dma = 0;
1821         ha->gid_list = NULL;
1822         ha->gid_list_dma = 0;
1823
1824         ha->response_ring = NULL;
1825         ha->response_dma = 0;
1826         ha->request_ring = NULL;
1827         ha->request_dma = 0;
1828
1829         list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1830                 fcport = list_entry(fcpl, fc_port_t, list);
1831
1832                 /* fc ports */
1833                 list_del_init(&fcport->list);
1834                 kfree(fcport);
1835         }
1836         INIT_LIST_HEAD(&ha->fcports);
1837
1838         if (ha->fw_dump)
1839                 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1840
1841         if (ha->fw_dump_buffer)
1842                 vfree(ha->fw_dump_buffer);
1843
1844         ha->fw_dump = NULL;
1845         ha->fw_dump_reading = 0;
1846         ha->fw_dump_buffer = NULL;
1847 }
1848
1849 /*
1850  * qla2x00_allocate_sp_pool
1851  *       This routine is called during initialization to allocate
1852  *       memory for local srb_t.
1853  *
1854  * Input:
1855  *       ha   = adapter block pointer.
1856  *
1857  * Context:
1858  *      Kernel context.
1859  *
1860  * Note: Sets the ref_count for non Null sp to one.
1861  */
1862 static int
1863 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1864 {
1865         int      rval;
1866
1867         rval = QLA_SUCCESS;
1868         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1869             mempool_free_slab, srb_cachep);
1870         if (ha->srb_mempool == NULL) {
1871                 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1872                 rval = QLA_FUNCTION_FAILED;
1873         }
1874         return (rval);
1875 }
1876
1877 /*
1878  *  This routine frees all adapter allocated memory.
1879  *
1880  */
1881 static void
1882 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1883 {
1884         if (ha->srb_mempool) {
1885                 mempool_destroy(ha->srb_mempool);
1886                 ha->srb_mempool = NULL;
1887         }
1888 }
1889
1890 /**************************************************************************
1891 * qla2x00_do_dpc
1892 *   This kernel thread is a task that is schedule by the interrupt handler
1893 *   to perform the background processing for interrupts.
1894 *
1895 * Notes:
1896 * This task always run in the context of a kernel thread.  It
1897 * is kick-off by the driver's detect code and starts up
1898 * up one per adapter. It immediately goes to sleep and waits for
1899 * some fibre event.  When either the interrupt handler or
1900 * the timer routine detects a event it will one of the task
1901 * bits then wake us up.
1902 **************************************************************************/
1903 static int
1904 qla2x00_do_dpc(void *data)
1905 {
1906         DECLARE_MUTEX_LOCKED(sem);
1907         scsi_qla_host_t *ha;
1908         fc_port_t       *fcport;
1909         uint8_t         status;
1910         uint16_t        next_loopid;
1911
1912         ha = (scsi_qla_host_t *)data;
1913
1914         lock_kernel();
1915
1916         daemonize("%s_dpc", ha->host_str);
1917         allow_signal(SIGHUP);
1918
1919         ha->dpc_wait = &sem;
1920
1921         set_user_nice(current, -20);
1922
1923         unlock_kernel();
1924
1925         complete(&ha->dpc_inited);
1926
1927         while (1) {
1928                 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1929
1930                 if (down_interruptible(&sem))
1931                         break;
1932
1933                 if (ha->dpc_should_die)
1934                         break;
1935
1936                 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1937
1938                 /* Initialization not yet finished. Don't do anything yet. */
1939                 if (!ha->flags.init_done || ha->dpc_active)
1940                         continue;
1941
1942                 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1943
1944                 ha->dpc_active = 1;
1945
1946                 if (ha->flags.mbox_busy) {
1947                         ha->dpc_active = 0;
1948                         continue;
1949                 }
1950
1951                 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1952
1953                         DEBUG(printk("scsi(%ld): dpc: sched "
1954                             "qla2x00_abort_isp ha = %p\n",
1955                             ha->host_no, ha));
1956                         if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1957                             &ha->dpc_flags))) {
1958
1959                                 if (qla2x00_abort_isp(ha)) {
1960                                         /* failed. retry later */
1961                                         set_bit(ISP_ABORT_NEEDED,
1962                                             &ha->dpc_flags);
1963                                 }
1964                                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1965                         }
1966                         DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1967                             ha->host_no));
1968                 }
1969
1970                 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1971                     (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1972
1973                         DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1974                             ha->host_no));
1975
1976                         qla2x00_rst_aen(ha);
1977                         clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1978                 }
1979
1980                 /* Retry each device up to login retry count */
1981                 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1982                     !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1983                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
1984
1985                         DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
1986                             ha->host_no));
1987
1988                         next_loopid = 0;
1989                         list_for_each_entry(fcport, &ha->fcports, list) {
1990                                 if (fcport->port_type != FCT_TARGET)
1991                                         continue;
1992
1993                                 /*
1994                                  * If the port is not ONLINE then try to login
1995                                  * to it if we haven't run out of retries.
1996                                  */
1997                                 if (atomic_read(&fcport->state) != FCS_ONLINE &&
1998                                     fcport->login_retry) {
1999
2000                                         fcport->login_retry--;
2001                                         if (fcport->flags & FCF_FABRIC_DEVICE) {
2002                                                 if (fcport->flags &
2003                                                     FCF_TAPE_PRESENT)
2004                                                         ha->isp_ops.fabric_logout(
2005                                                             ha, fcport->loop_id);
2006                                                 status = qla2x00_fabric_login(
2007                                                     ha, fcport, &next_loopid);
2008                                         } else
2009                                                 status =
2010                                                     qla2x00_local_device_login(
2011                                                         ha, fcport->loop_id);
2012
2013                                         if (status == QLA_SUCCESS) {
2014                                                 fcport->old_loop_id = fcport->loop_id;
2015
2016                                                 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
2017                                                     ha->host_no, fcport->loop_id));
2018
2019                                                 fcport->port_login_retry_count =
2020                                                     ha->port_down_retry_count * PORT_RETRY_TIME;
2021                                                 atomic_set(&fcport->state, FCS_ONLINE);
2022                                                 atomic_set(&fcport->port_down_timer,
2023                                                     ha->port_down_retry_count * PORT_RETRY_TIME);
2024
2025                                                 fcport->login_retry = 0;
2026                                         } else if (status == 1) {
2027                                                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
2028                                                 /* retry the login again */
2029                                                 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
2030                                                     ha->host_no,
2031                                                     fcport->login_retry, fcport->loop_id));
2032                                         } else {
2033                                                 fcport->login_retry = 0;
2034                                         }
2035                                 }
2036                                 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
2037                                         break;
2038                         }
2039                         DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
2040                             ha->host_no));
2041                 }
2042
2043                 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
2044                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
2045
2046                         clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
2047                         DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
2048                             ha->host_no));
2049
2050                         set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2051
2052                         DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2053                             ha->host_no));
2054                 }
2055
2056                 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2057
2058                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2059                             ha->host_no));
2060
2061                         if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2062                             &ha->dpc_flags))) {
2063
2064                                 qla2x00_loop_resync(ha);
2065
2066                                 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2067                         }
2068
2069                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2070                             ha->host_no));
2071                 }
2072
2073                 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2074
2075                         DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2076                             ha->host_no));
2077
2078                         qla2x00_rescan_fcports(ha);
2079
2080                         DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2081                             "end.\n",
2082                             ha->host_no));
2083                 }
2084
2085                 if (!ha->interrupts_on)
2086                         ha->isp_ops.enable_intrs(ha);
2087
2088                 ha->dpc_active = 0;
2089         } /* End of while(1) */
2090
2091         DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2092
2093         /*
2094          * Make sure that nobody tries to wake us up again.
2095          */
2096         ha->dpc_wait = NULL;
2097         ha->dpc_active = 0;
2098
2099         complete_and_exit(&ha->dpc_exited, 0);
2100 }
2101
2102 /*
2103 *  qla2x00_rst_aen
2104 *      Processes asynchronous reset.
2105 *
2106 * Input:
2107 *      ha  = adapter block pointer.
2108 */
2109 static void
2110 qla2x00_rst_aen(scsi_qla_host_t *ha)
2111 {
2112         if (ha->flags.online && !ha->flags.reset_active &&
2113             !atomic_read(&ha->loop_down_timer) &&
2114             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2115                 do {
2116                         clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2117
2118                         /*
2119                          * Issue marker command only when we are going to start
2120                          * the I/O.
2121                          */
2122                         ha->marker_needed = 1;
2123                 } while (!atomic_read(&ha->loop_down_timer) &&
2124                     (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2125         }
2126 }
2127
2128
2129 /*
2130  * This routine will allocate SP from the free queue
2131  * input:
2132  *        scsi_qla_host_t *
2133  * output:
2134  *        srb_t * or NULL
2135  */
2136 static srb_t *
2137 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2138 {
2139         srb_t *sp;
2140
2141         sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2142         if (sp)
2143                 atomic_set(&sp->ref_count, 1);
2144         return (sp);
2145 }
2146
2147 static void
2148 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2149 {
2150         struct scsi_cmnd *cmd = sp->cmd;
2151
2152         if (sp->flags & SRB_DMA_VALID) {
2153                 if (cmd->use_sg) {
2154                         dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2155                             cmd->use_sg, cmd->sc_data_direction);
2156                 } else if (cmd->request_bufflen) {
2157                         dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2158                             cmd->request_bufflen, cmd->sc_data_direction);
2159                 }
2160                 sp->flags &= ~SRB_DMA_VALID;
2161         }
2162 }
2163
2164 void
2165 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2166 {
2167         struct scsi_cmnd *cmd = sp->cmd;
2168
2169         qla2x00_sp_free_dma(ha, sp);
2170
2171         CMD_SP(cmd) = NULL;
2172         mempool_free(sp, ha->srb_mempool);
2173
2174         cmd->scsi_done(cmd);
2175 }
2176
2177 /**************************************************************************
2178 *   qla2x00_timer
2179 *
2180 * Description:
2181 *   One second timer
2182 *
2183 * Context: Interrupt
2184 ***************************************************************************/
2185 static void
2186 qla2x00_timer(scsi_qla_host_t *ha)
2187 {
2188         unsigned long   cpu_flags = 0;
2189         fc_port_t       *fcport;
2190         int             start_dpc = 0;
2191         int             index;
2192         srb_t           *sp;
2193         int             t;
2194
2195         /*
2196          * Ports - Port down timer.
2197          *
2198          * Whenever, a port is in the LOST state we start decrementing its port
2199          * down timer every second until it reaches zero. Once  it reaches zero
2200          * the port it marked DEAD.
2201          */
2202         t = 0;
2203         list_for_each_entry(fcport, &ha->fcports, list) {
2204                 if (fcport->port_type != FCT_TARGET)
2205                         continue;
2206
2207                 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2208
2209                         if (atomic_read(&fcport->port_down_timer) == 0)
2210                                 continue;
2211
2212                         if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2213                                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2214
2215                         DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2216                             "%d remainning\n",
2217                             ha->host_no,
2218                             t, atomic_read(&fcport->port_down_timer)));
2219                 }
2220                 t++;
2221         } /* End of for fcport  */
2222
2223
2224         /* Loop down handler. */
2225         if (atomic_read(&ha->loop_down_timer) > 0 &&
2226             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2227
2228                 if (atomic_read(&ha->loop_down_timer) ==
2229                     ha->loop_down_abort_time) {
2230
2231                         DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2232                             "queues before time expire\n",
2233                             ha->host_no));
2234
2235                         if (!IS_QLA2100(ha) && ha->link_down_timeout)
2236                                 atomic_set(&ha->loop_state, LOOP_DEAD);
2237
2238                         /* Schedule an ISP abort to return any tape commands. */
2239                         spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2240                         for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2241                             index++) {
2242                                 fc_port_t *sfcp;
2243
2244                                 sp = ha->outstanding_cmds[index];
2245                                 if (!sp)
2246                                         continue;
2247                                 sfcp = sp->fcport;
2248                                 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2249                                         continue;
2250
2251                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2252                                 break;
2253                         }
2254                         spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2255
2256                         set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2257                         start_dpc++;
2258                 }
2259
2260                 /* if the loop has been down for 4 minutes, reinit adapter */
2261                 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2262                         DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2263                             "restarting queues.\n",
2264                             ha->host_no));
2265
2266                         set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2267                         start_dpc++;
2268
2269                         if (!(ha->device_flags & DFLG_NO_CABLE)) {
2270                                 DEBUG(printk("scsi(%ld): Loop down - "
2271                                     "aborting ISP.\n",
2272                                     ha->host_no));
2273                                 qla_printk(KERN_WARNING, ha,
2274                                     "Loop down - aborting ISP.\n");
2275
2276                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2277                         }
2278                 }
2279                 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2280                     ha->host_no,
2281                     atomic_read(&ha->loop_down_timer)));
2282         }
2283
2284         /* Schedule the DPC routine if needed */
2285         if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2286             test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2287             start_dpc ||
2288             test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2289             test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2290             test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2291             ha->dpc_wait && !ha->dpc_active) {
2292
2293                 up(ha->dpc_wait);
2294         }
2295
2296         qla2x00_restart_timer(ha, WATCH_INTERVAL);
2297 }
2298
2299 /* XXX(hch): crude hack to emulate a down_timeout() */
2300 int
2301 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2302 {
2303         const unsigned int step = HZ/10;
2304
2305         do {
2306                 if (!down_trylock(sema))
2307                         return 0;
2308                 set_current_state(TASK_INTERRUPTIBLE);
2309                 if (schedule_timeout(step))
2310                         break;
2311         } while ((timeout -= step) > 0);
2312
2313         return -ETIMEDOUT;
2314 }
2315
2316 /**
2317  * qla2x00_module_init - Module initialization.
2318  **/
2319 static int __init
2320 qla2x00_module_init(void)
2321 {
2322         /* Allocate cache for SRBs. */
2323         srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
2324             SLAB_HWCACHE_ALIGN, NULL, NULL);
2325         if (srb_cachep == NULL) {
2326                 printk(KERN_ERR
2327                     "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2328                 return -ENOMEM;
2329         }
2330
2331         /* Derive version string. */
2332         strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2333 #if DEBUG_QLA2100
2334         strcat(qla2x00_version_str, "-debug");
2335 #endif
2336         qla2xxx_transport_template =
2337             fc_attach_transport(&qla2xxx_transport_functions);
2338         if (!qla2xxx_transport_template)
2339                 return -ENODEV;
2340
2341         printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2342         return 0;
2343 }
2344
2345 /**
2346  * qla2x00_module_exit - Module cleanup.
2347  **/
2348 static void __exit
2349 qla2x00_module_exit(void)
2350 {
2351         kmem_cache_destroy(srb_cachep);
2352         fc_release_transport(qla2xxx_transport_template);
2353 }
2354
2355 module_init(qla2x00_module_init);
2356 module_exit(qla2x00_module_exit);
2357
2358 MODULE_AUTHOR("QLogic Corporation");
2359 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2360 MODULE_LICENSE("GPL");
2361 MODULE_VERSION(QLA2XXX_VERSION);