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_get_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_get_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
 469         if (!CMD_SP(cmd))
 470                 return FAILED;
 471
 472         ret = FAILED;
 473
 474         id = cmd->device->id;
 475         lun = cmd->device->lun;
 476         serial = cmd->serial_number;
 477
 478         /* Check active list for command command. */
 479         spin_lock(&ha->hardware_lock);
 480         for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
 481                 sp = ha->outstanding_cmds[i];
 482
 483                 if (sp == NULL)
 484                         continue;
 485
 486                 if (sp->cmd != cmd)
 487                         continue;
 488
 489                 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
 490                     "sp->state=%x\n", __func__, ha->host_no, sp, serial,
 491                     sp->state));
 492                 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
 493
 494                 spin_unlock(&ha->hardware_lock);
 495                 if (qla2x00_abort_command(ha, sp)) {
 496                         DEBUG2(printk("%s(%ld): abort_command "
 497                             "mbx failed.\n", __func__, ha->host_no));
 498                 } else {
 499                         DEBUG3(printk("%s(%ld): abort_command "
 500                             "mbx success.\n", __func__, ha->host_no));
 501                         ret = SUCCESS;
 502                 }
 503                 spin_lock(&ha->hardware_lock);
 504
 505                 break;
 506         }
 507
 508         /* Wait for the command to be returned. */
 509         if (ret == SUCCESS) {
 510                 spin_unlock(&ha->hardware_lock);
 511                 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
 512                         qla_printk(KERN_ERR, ha,
 513                             "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
 514                             "%x.\n", ha->host_no, id, lun, serial, ret);
 515                 }
 516                 spin_lock(&ha->hardware_lock);
 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
 548         status = 0;
 549
 550         /*
 551          * Waiting for all commands for the designated target in the active
 552          * array
 553          */
 554         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 555                 spin_lock(&ha->hardware_lock);
 556                 sp = ha->outstanding_cmds[cnt];
 557                 if (sp) {
 558                         cmd = sp->cmd;
 559                         spin_unlock(&ha->hardware_lock);
 560                         if (cmd->device->id == t) {
 561                                 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
 562                                         status = 1;
 563                                         break;
 564                                 }
 565                         }
 566                 } else {
 567                         spin_unlock(&ha->hardware_lock);
 568                 }
 569         }
 570         return (status);
 571 }
 572
 573
 574 /**************************************************************************
 575 * qla2xxx_eh_device_reset
 576 *
 577 * Description:
 578 *    The device reset function will reset the target and abort any
 579 *    executing commands.
 580 *
 581 *    NOTE: The use of SP is undefined within this context.  Do *NOT*
 582 *          attempt to use this value, even if you determine it is
 583 *          non-null.
 584 *
 585 * Input:
 586 *    cmd = Linux SCSI command packet of the command that cause the
 587 *          bus device reset.
 588 *
 589 * Returns:
 590 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 591 *
 592 **************************************************************************/
 593 int
 594 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
 595 {
 596         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 597         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 598         srb_t *sp;
 599         int ret;
 600         unsigned int id, lun;
 601         unsigned long serial;
 602
 603         ret = FAILED;
 604
 605         id = cmd->device->id;
 606         lun = cmd->device->lun;
 607         serial = cmd->serial_number;
 608
 609         sp = (srb_t *) CMD_SP(cmd);
 610         if (!sp || !fcport)
 611                 return ret;
 612
 613         qla_printk(KERN_INFO, ha,
 614             "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
 615
 616         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 617                 goto eh_dev_reset_done;
 618
 619         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 620                 if (qla2x00_device_reset(ha, fcport) == 0)
 621                         ret = SUCCESS;
 622
 623 #if defined(LOGOUT_AFTER_DEVICE_RESET)
 624                 if (ret == SUCCESS) {
 625                         if (fcport->flags & FC_FABRIC_DEVICE) {
 626                                 qla2x00_fabric_logout(ha, fcport->loop_id);
 627                                 qla2x00_mark_device_lost(ha, fcport);
 628                         }
 629                 }
 630 #endif
 631         } else {
 632                 DEBUG2(printk(KERN_INFO
 633                     "%s failed: loop not ready\n",__func__);)
 634         }
 635
 636         if (ret == FAILED) {
 637                 DEBUG3(printk("%s(%ld): device reset failed\n",
 638                     __func__, ha->host_no));
 639                 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
 640                     __func__);
 641
 642                 goto eh_dev_reset_done;
 643         }
 644
 645         /*
 646          * If we are coming down the EH path, wait for all commands to
 647          * complete for the device.
 648          */
 649         if (cmd->device->host->eh_active) {
 650                 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
 651                         ret = FAILED;
 652
 653                 if (ret == FAILED) {
 654                         DEBUG3(printk("%s(%ld): failed while waiting for "
 655                             "commands\n", __func__, ha->host_no));
 656                         qla_printk(KERN_INFO, ha,
 657                             "%s: failed while waiting for commands\n",
 658                             __func__);
 659
 660                         goto eh_dev_reset_done;
 661                 }
 662         }
 663
 664         qla_printk(KERN_INFO, ha,
 665             "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
 666
 667 eh_dev_reset_done:
 668         return ret;
 669 }
 670
 671 /**************************************************************************
 672 * qla2x00_eh_wait_for_pending_commands
 673 *
 674 * Description:
 675 *    Waits for all the commands to come back from the specified host.
 676 *
 677 * Input:
 678 *    ha - pointer to scsi_qla_host structure.
 679 *
 680 * Returns:
 681 *    1 : SUCCESS
 682 *    0 : FAILED
 683 *
 684 * Note:
 685 **************************************************************************/
 686 static int
 687 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
 688 {
 689         int     cnt;
 690         int     status;
 691         srb_t           *sp;
 692         struct scsi_cmnd *cmd;
 693
 694         status = 1;
 695
 696         /*
 697          * Waiting for all commands for the designated target in the active
 698          * array
 699          */
 700         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 701                 spin_lock(&ha->hardware_lock);
 702                 sp = ha->outstanding_cmds[cnt];
 703                 if (sp) {
 704                         cmd = sp->cmd;
 705                         spin_unlock(&ha->hardware_lock);
 706                         status = qla2x00_eh_wait_on_command(ha, cmd);
 707                         if (status == 0)
 708                                 break;
 709                 }
 710                 else {
 711                         spin_unlock(&ha->hardware_lock);
 712                 }
 713         }
 714         return (status);
 715 }
 716
 717
 718 /**************************************************************************
 719 * qla2xxx_eh_bus_reset
 720 *
 721 * Description:
 722 *    The bus reset function will reset the bus and abort any executing
 723 *    commands.
 724 *
 725 * Input:
 726 *    cmd = Linux SCSI command packet of the command that cause the
 727 *          bus reset.
 728 *
 729 * Returns:
 730 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 731 *
 732 **************************************************************************/
 733 int
 734 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
 735 {
 736         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 737         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 738         srb_t *sp;
 739         int ret;
 740         unsigned int id, lun;
 741         unsigned long serial;
 742
 743         ret = FAILED;
 744
 745         id = cmd->device->id;
 746         lun = cmd->device->lun;
 747         serial = cmd->serial_number;
 748
 749         sp = (srb_t *) CMD_SP(cmd);
 750         if (!sp || !fcport)
 751                 return ret;
 752
 753         qla_printk(KERN_INFO, ha,
 754             "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
 755
 756         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
 757                 DEBUG2(printk("%s failed:board disabled\n",__func__));
 758                 goto eh_bus_reset_done;
 759         }
 760
 761         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 762                 if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
 763                         ret = SUCCESS;
 764         }
 765         if (ret == FAILED)
 766                 goto eh_bus_reset_done;
 767
 768         /* Waiting for our command in done_queue to be returned to OS.*/
 769         if (cmd->device->host->eh_active)
 770                 if (!qla2x00_eh_wait_for_pending_commands(ha))
 771                         ret = FAILED;
 772
 773 eh_bus_reset_done:
 774         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 775             (ret == FAILED) ? "failed" : "succeded");
 776
 777         return ret;
 778 }
 779
 780 /**************************************************************************
 781 * qla2xxx_eh_host_reset
 782 *
 783 * Description:
 784 *    The reset function will reset the Adapter.
 785 *
 786 * Input:
 787 *      cmd = Linux SCSI command packet of the command that cause the
 788 *            adapter reset.
 789 *
 790 * Returns:
 791 *      Either SUCCESS or FAILED.
 792 *
 793 * Note:
 794 **************************************************************************/
 795 int
 796 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
 797 {
 798         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 799         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 800         srb_t *sp;
 801         int ret;
 802         unsigned int id, lun;
 803         unsigned long serial;
 804
 805         ret = FAILED;
 806
 807         id = cmd->device->id;
 808         lun = cmd->device->lun;
 809         serial = cmd->serial_number;
 810
 811         sp = (srb_t *) CMD_SP(cmd);
 812         if (!sp || !fcport)
 813                 return ret;
 814
 815         qla_printk(KERN_INFO, ha,
 816             "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
 817
 818         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 819                 goto eh_host_reset_lock;
 820
 821         /*
 822          * Fixme-may be dpc thread is active and processing
 823          * loop_resync,so wait a while for it to
 824          * be completed and then issue big hammer.Otherwise
 825          * it may cause I/O failure as big hammer marks the
 826          * devices as lost kicking of the port_down_timer
 827          * while dpc is stuck for the mailbox to complete.
 828          */
 829         qla2x00_wait_for_loop_ready(ha);
 830         set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 831         if (qla2x00_abort_isp(ha)) {
 832                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 833                 /* failed. schedule dpc to try */
 834                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 835
 836                 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 837                         goto eh_host_reset_lock;
 838         }
 839         clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 840
 841         /* Waiting for our command in done_queue to be returned to OS.*/
 842         if (qla2x00_eh_wait_for_pending_commands(ha))
 843                 ret = SUCCESS;
 844
 845 eh_host_reset_lock:
 846         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 847             (ret == FAILED) ? "failed" : "succeded");
 848
 849         return ret;
 850 }
 851
 852 /*
 853 * qla2x00_loop_reset
 854 *      Issue loop reset.
 855 *
 856 * Input:
 857 *      ha = adapter block pointer.
 858 *
 859 * Returns:
 860 *      0 = success
 861 */
 862 static int
 863 qla2x00_loop_reset(scsi_qla_host_t *ha)
 864 {
 865         int status = QLA_SUCCESS;
 866         struct fc_port *fcport;
 867
 868         if (ha->flags.enable_lip_reset) {
 869                 status = qla2x00_lip_reset(ha);
 870         }
 871
 872         if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
 873                 list_for_each_entry(fcport, &ha->fcports, list) {
 874                         if (fcport->port_type != FCT_TARGET)
 875                                 continue;
 876
 877                         status = qla2x00_target_reset(ha, fcport);
 878                         if (status != QLA_SUCCESS)
 879                                 break;
 880                 }
 881         }
 882
 883         if (status == QLA_SUCCESS &&
 884                 ((!ha->flags.enable_target_reset &&
 885                   !ha->flags.enable_lip_reset) ||
 886                 ha->flags.enable_lip_full_login)) {
 887
 888                 status = qla2x00_full_login_lip(ha);
 889         }
 890
 891         /* Issue marker command only when we are going to start the I/O */
 892         ha->marker_needed = 1;
 893
 894         if (status) {
 895                 /* Empty */
 896                 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
 897                                 __func__,
 898                                 ha->host_no);)
 899         } else {
 900                 /* Empty */
 901                 DEBUG3(printk("%s(%ld): exiting normally.\n",
 902                                 __func__,
 903                                 ha->host_no);)
 904         }
 905
 906         return(status);
 907 }
 908
 909 /*
 910  * qla2x00_device_reset
 911  *      Issue bus device reset message to the target.
 912  *
 913  * Input:
 914  *      ha = adapter block pointer.
 915  *      t = SCSI ID.
 916  *      TARGET_QUEUE_LOCK must be released.
 917  *      ADAPTER_STATE_LOCK must be released.
 918  *
 919  * Context:
 920  *      Kernel context.
 921  */
 922 static int
 923 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
 924 {
 925         /* Abort Target command will clear Reservation */
 926         return qla2x00_abort_target(reset_fcport);
 927 }
 928
 929 static int
 930 qla2xxx_slave_alloc(struct scsi_device *sdev)
 931 {
 932         scsi_qla_host_t *ha = to_qla_host(sdev->host);
 933         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 934         fc_port_t *fcport;
 935         int found;
 936
 937         if (!rport)
 938                 return -ENXIO;
 939
 940         found = 0;
 941         list_for_each_entry(fcport, &ha->fcports, list) {
 942                 if (rport->port_name ==
 943                     be64_to_cpu(*(uint64_t *)fcport->port_name)) {
 944                         found++;
 945                         break;
 946                 }
 947         }
 948         if (!found)
 949                 return -ENXIO;
 950
 951         sdev->hostdata = fcport;
 952
 953         return 0;
 954 }
 955
 956 static int
 957 qla2xxx_slave_configure(struct scsi_device *sdev)
 958 {
 959         scsi_qla_host_t *ha = to_qla_host(sdev->host);
 960         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
 961
 962         if (sdev->tagged_supported)
 963                 scsi_activate_tcq(sdev, 32);
 964         else
 965                 scsi_deactivate_tcq(sdev, 32);
 966
 967         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
 968
 969         return 0;
 970 }
 971
 972 static void
 973 qla2xxx_slave_destroy(struct scsi_device *sdev)
 974 {
 975         sdev->hostdata = NULL;
 976 }
 977
 978 /**
 979  * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
 980  * @ha: HA context
 981  *
 982  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
 983  * supported addressing method.
 984  */
 985 static void
 986 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
 987 {
 988         /* Assume 32bit DMA address */
 989         ha->flags.enable_64bit_addressing = 0;
 990         ha->calc_request_entries = qla2x00_calc_iocbs_32;
 991         ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
 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->calc_request_entries = qla2x00_calc_iocbs_64;
1001                         ha->build_scsi_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 /*
1089  * PCI driver interface
1090  */
1091 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1092 {
1093         int     ret;
1094         device_reg_t __iomem *reg;
1095         struct Scsi_Host *host;
1096         scsi_qla_host_t *ha;
1097         unsigned long   flags = 0;
1098         unsigned long   wait_switch = 0;
1099         char pci_info[20];
1100         char fw_str[30];
1101         fc_port_t *fcport;
1102
1103         if (pci_enable_device(pdev))
1104                 return -1;
1105
1106         host = scsi_host_alloc(&qla2x00_driver_template,
1107             sizeof(scsi_qla_host_t));
1108         if (host == NULL) {
1109                 printk(KERN_WARNING
1110                     "qla2xxx: Couldn't allocate host from scsi layer!\n");
1111                 goto probe_disable_device;
1112         }
1113
1114         /* Clear our data area */
1115         ha = (scsi_qla_host_t *)host->hostdata;
1116         memset(ha, 0, sizeof(scsi_qla_host_t));
1117
1118         ha->pdev = pdev;
1119         ha->host = host;
1120         ha->host_no = host->host_no;
1121         ha->brd_info = brd_info;
1122         sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1123
1124         /* Configure PCI I/O space */
1125         ret = qla2x00_iospace_config(ha);
1126         if (ret != 0) {
1127                 goto probe_alloc_failed;
1128         }
1129
1130         /* Sanitize the information from PCI BIOS. */
1131         host->irq = pdev->irq;
1132
1133         qla_printk(KERN_INFO, ha,
1134             "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1135             host->irq, ha->iobase);
1136
1137         spin_lock_init(&ha->hardware_lock);
1138
1139         ha->prev_topology = 0;
1140         ha->ports = MAX_BUSES;
1141
1142         if (IS_QLA2100(ha)) {
1143                 host->max_id = MAX_TARGETS_2100;
1144                 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1145                 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1146                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1147                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1148                 host->sg_tablesize = 32;
1149         } else if (IS_QLA2200(ha)) {
1150                 host->max_id = MAX_TARGETS_2200;
1151                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1152                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1153                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1154                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1155         } else /*if (IS_QLA2300(ha))*/ {
1156                 host->max_id = MAX_TARGETS_2200;
1157                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1158                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1159                 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1160                 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1161         }
1162         host->can_queue = ha->request_q_length + 128;
1163
1164         /* load the F/W, read paramaters, and init the H/W */
1165         ha->instance = num_hosts;
1166
1167         init_MUTEX(&ha->mbx_cmd_sem);
1168         init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1169
1170         INIT_LIST_HEAD(&ha->list);
1171         INIT_LIST_HEAD(&ha->fcports);
1172         INIT_LIST_HEAD(&ha->rscn_fcports);
1173
1174         /*
1175          * These locks are used to prevent more than one CPU
1176          * from modifying the queue at the same time. The
1177          * higher level "host_lock" will reduce most
1178          * contention for these locks.
1179          */
1180         spin_lock_init(&ha->mbx_reg_lock);
1181
1182         ha->dpc_pid = -1;
1183         init_completion(&ha->dpc_inited);
1184         init_completion(&ha->dpc_exited);
1185
1186         qla2x00_config_dma_addressing(ha);
1187         if (qla2x00_mem_alloc(ha)) {
1188                 qla_printk(KERN_WARNING, ha,
1189                     "[ERROR] Failed to allocate memory for adapter\n");
1190
1191                 goto probe_alloc_failed;
1192         }
1193
1194         pci_set_drvdata(pdev, ha);
1195         host->this_id = 255;
1196         host->cmd_per_lun = 3;
1197         host->unique_id = ha->instance;
1198         host->max_cmd_len = MAX_CMDSZ;
1199         host->max_channel = ha->ports - 1;
1200         host->max_lun = MAX_LUNS;
1201         host->transportt = qla2xxx_transport_template;
1202         if (scsi_add_host(host, &pdev->dev))
1203                 goto probe_alloc_failed;
1204
1205         qla2x00_alloc_sysfs_attr(ha);
1206
1207         if (qla2x00_initialize_adapter(ha) &&
1208             !(ha->device_flags & DFLG_NO_CABLE)) {
1209
1210                 qla_printk(KERN_WARNING, ha,
1211                     "Failed to initialize adapter\n");
1212
1213                 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1214                     "Adapter flags %x.\n",
1215                     ha->host_no, ha->device_flags));
1216
1217                 goto probe_failed;
1218         }
1219
1220         qla2x00_init_host_attr(ha);
1221
1222         /*
1223          * Startup the kernel thread for this host adapter
1224          */
1225         ha->dpc_should_die = 0;
1226         ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1227         if (ha->dpc_pid < 0) {
1228                 qla_printk(KERN_WARNING, ha,
1229                     "Unable to start DPC thread!\n");
1230
1231                 goto probe_failed;
1232         }
1233         wait_for_completion(&ha->dpc_inited);
1234
1235         if (IS_QLA2100(ha) || IS_QLA2200(ha))
1236                 ret = request_irq(host->irq, qla2100_intr_handler,
1237                     SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1238         else
1239                 ret = request_irq(host->irq, qla2300_intr_handler,
1240                     SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1241         if (ret != 0) {
1242                 qla_printk(KERN_WARNING, ha,
1243                     "Failed to reserve interrupt %d already in use.\n",
1244                     host->irq);
1245                 goto probe_failed;
1246         }
1247
1248         /* Initialized the timer */
1249         qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1250
1251         DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1252             ha->host_no, ha));
1253
1254         reg = ha->iobase;
1255
1256         /* Disable ISP interrupts. */
1257         qla2x00_disable_intrs(ha);
1258
1259         /* Ensure mailbox registers are free. */
1260         spin_lock_irqsave(&ha->hardware_lock, flags);
1261         WRT_REG_WORD(&reg->semaphore, 0);
1262         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1263         WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1264
1265         /* Enable proper parity */
1266         if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1267                 if (IS_QLA2300(ha))
1268                         /* SRAM parity */
1269                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1270                 else
1271                         /* SRAM, Instruction RAM and GP RAM parity */
1272                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1273         }
1274         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1275
1276         /* Enable chip interrupts. */
1277         qla2x00_enable_intrs(ha);
1278
1279         /* v2.19.5b6 */
1280         /*
1281          * Wait around max loop_reset_delay secs for the devices to come
1282          * on-line. We don't want Linux scanning before we are ready.
1283          *
1284          */
1285         for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1286             time_before(jiffies,wait_switch) &&
1287              !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1288              && (ha->device_flags & SWITCH_FOUND) ;) {
1289
1290                 qla2x00_check_fabric_devices(ha);
1291
1292                 msleep(10);
1293         }
1294
1295         ha->flags.init_done = 1;
1296         num_hosts++;
1297
1298         qla_printk(KERN_INFO, ha, "\n"
1299             " QLogic Fibre Channel HBA Driver: %s\n"
1300             "  QLogic %s - %s\n"
1301             "  %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1302             ha->model_number, ha->model_desc ? ha->model_desc: "",
1303             ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
1304             pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1305             ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
1306
1307         /* Go with fc_rport registration. */
1308         list_for_each_entry(fcport, &ha->fcports, list)
1309                 qla2x00_reg_remote_port(ha, fcport);
1310
1311         return 0;
1312
1313 probe_failed:
1314         fc_remove_host(ha->host);
1315
1316         scsi_remove_host(host);
1317
1318 probe_alloc_failed:
1319         qla2x00_free_device(ha);
1320
1321         scsi_host_put(host);
1322
1323 probe_disable_device:
1324         pci_disable_device(pdev);
1325
1326         return -1;
1327 }
1328 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1329
1330 void qla2x00_remove_one(struct pci_dev *pdev)
1331 {
1332         scsi_qla_host_t *ha;
1333
1334         ha = pci_get_drvdata(pdev);
1335
1336         qla2x00_free_sysfs_attr(ha);
1337
1338         fc_remove_host(ha->host);
1339
1340         scsi_remove_host(ha->host);
1341
1342         qla2x00_free_device(ha);
1343
1344         scsi_host_put(ha->host);
1345
1346         pci_set_drvdata(pdev, NULL);
1347 }
1348 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1349
1350 static void
1351 qla2x00_free_device(scsi_qla_host_t *ha)
1352 {
1353         int ret;
1354
1355         /* Abort any outstanding IO descriptors. */
1356         if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1357                 qla2x00_cancel_io_descriptors(ha);
1358
1359         /* turn-off interrupts on the card */
1360         if (ha->interrupts_on)
1361                 qla2x00_disable_intrs(ha);
1362
1363         /* Disable timer */
1364         if (ha->timer_active)
1365                 qla2x00_stop_timer(ha);
1366
1367         /* Kill the kernel thread for this host */
1368         if (ha->dpc_pid >= 0) {
1369                 ha->dpc_should_die = 1;
1370                 wmb();
1371                 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1372                 if (ret) {
1373                         qla_printk(KERN_ERR, ha,
1374                             "Unable to signal DPC thread -- (%d)\n", ret);
1375
1376                         /* TODO: SOMETHING MORE??? */
1377                 } else {
1378                         wait_for_completion(&ha->dpc_exited);
1379                 }
1380         }
1381
1382         qla2x00_mem_free(ha);
1383
1384
1385         ha->flags.online = 0;
1386
1387         /* Detach interrupts */
1388         if (ha->pdev->irq)
1389                 free_irq(ha->pdev->irq, ha);
1390
1391         /* release io space registers  */
1392         if (ha->iobase)
1393                 iounmap(ha->iobase);
1394         pci_release_regions(ha->pdev);
1395
1396         pci_disable_device(ha->pdev);
1397 }
1398
1399 /*
1400  * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1401  *
1402  * Input: ha = adapter block pointer.  fcport = port structure pointer.
1403  *
1404  * Return: None.
1405  *
1406  * Context:
1407  */
1408 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1409     int do_login)
1410 {
1411         if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1412                 fc_remote_port_block(fcport->rport);
1413         /*
1414          * We may need to retry the login, so don't change the state of the
1415          * port but do the retries.
1416          */
1417         if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1418                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1419
1420         if (!do_login)
1421                 return;
1422
1423         if (fcport->login_retry == 0) {
1424                 fcport->login_retry = ha->login_retry_count;
1425                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1426
1427                 DEBUG(printk("scsi(%ld): Port login retry: "
1428                     "%02x%02x%02x%02x%02x%02x%02x%02x, "
1429                     "id = 0x%04x retry cnt=%d\n",
1430                     ha->host_no,
1431                     fcport->port_name[0],
1432                     fcport->port_name[1],
1433                     fcport->port_name[2],
1434                     fcport->port_name[3],
1435                     fcport->port_name[4],
1436                     fcport->port_name[5],
1437                     fcport->port_name[6],
1438                     fcport->port_name[7],
1439                     fcport->loop_id,
1440                     fcport->login_retry));
1441         }
1442 }
1443
1444 /*
1445  * qla2x00_mark_all_devices_lost
1446  *      Updates fcport state when device goes offline.
1447  *
1448  * Input:
1449  *      ha = adapter block pointer.
1450  *      fcport = port structure pointer.
1451  *
1452  * Return:
1453  *      None.
1454  *
1455  * Context:
1456  */
1457 void
1458 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1459 {
1460         fc_port_t *fcport;
1461
1462         list_for_each_entry(fcport, &ha->fcports, list) {
1463                 if (fcport->port_type != FCT_TARGET)
1464                         continue;
1465
1466                 /*
1467                  * No point in marking the device as lost, if the device is
1468                  * already DEAD.
1469                  */
1470                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1471                         continue;
1472                 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1473                         fc_remote_port_block(fcport->rport);
1474                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1475         }
1476 }
1477
1478 /*
1479 * qla2x00_mem_alloc
1480 *      Allocates adapter memory.
1481 *
1482 * Returns:
1483 *      0  = success.
1484 *      1  = failure.
1485 */
1486 static uint8_t
1487 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1488 {
1489         char    name[16];
1490         uint8_t   status = 1;
1491         int     retry= 10;
1492
1493         do {
1494                 /*
1495                  * This will loop only once if everything goes well, else some
1496                  * number of retries will be performed to get around a kernel
1497                  * bug where available mem is not allocated until after a
1498                  * little delay and a retry.
1499                  */
1500                 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1501                     (ha->request_q_length + 1) * sizeof(request_t),
1502                     &ha->request_dma, GFP_KERNEL);
1503                 if (ha->request_ring == NULL) {
1504                         qla_printk(KERN_WARNING, ha,
1505                             "Memory Allocation failed - request_ring\n");
1506
1507                         qla2x00_mem_free(ha);
1508                         msleep(100);
1509
1510                         continue;
1511                 }
1512
1513                 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1514                     (ha->response_q_length + 1) * sizeof(response_t),
1515                     &ha->response_dma, GFP_KERNEL);
1516                 if (ha->response_ring == NULL) {
1517                         qla_printk(KERN_WARNING, ha,
1518                             "Memory Allocation failed - response_ring\n");
1519
1520                         qla2x00_mem_free(ha);
1521                         msleep(100);
1522
1523                         continue;
1524                 }
1525
1526                 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1527                     &ha->gid_list_dma, GFP_KERNEL);
1528                 if (ha->gid_list == NULL) {
1529                         qla_printk(KERN_WARNING, ha,
1530                             "Memory Allocation failed - gid_list\n");
1531
1532                         qla2x00_mem_free(ha);
1533                         msleep(100);
1534
1535                         continue;
1536                 }
1537
1538                 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1539                     sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1540                 if (ha->rlc_rsp == NULL) {
1541                         qla_printk(KERN_WARNING, ha,
1542                                 "Memory Allocation failed - rlc");
1543
1544                         qla2x00_mem_free(ha);
1545                         msleep(100);
1546
1547                         continue;
1548                 }
1549
1550                 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1551                 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1552                     DMA_POOL_SIZE, 8, 0);
1553                 if (ha->s_dma_pool == NULL) {
1554                         qla_printk(KERN_WARNING, ha,
1555                             "Memory Allocation failed - s_dma_pool\n");
1556
1557                         qla2x00_mem_free(ha);
1558                         msleep(100);
1559
1560                         continue;
1561                 }
1562
1563                 /* get consistent memory allocated for init control block */
1564                 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1565                     &ha->init_cb_dma);
1566                 if (ha->init_cb == NULL) {
1567                         qla_printk(KERN_WARNING, ha,
1568                             "Memory Allocation failed - init_cb\n");
1569
1570                         qla2x00_mem_free(ha);
1571                         msleep(100);
1572
1573                         continue;
1574                 }
1575                 memset(ha->init_cb, 0, sizeof(init_cb_t));
1576
1577                 /* Get consistent memory allocated for Get Port Database cmd */
1578                 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1579                     &ha->iodesc_pd_dma);
1580                 if (ha->iodesc_pd == NULL) {
1581                         /* error */
1582                         qla_printk(KERN_WARNING, ha,
1583                             "Memory Allocation failed - iodesc_pd\n");
1584
1585                         qla2x00_mem_free(ha);
1586                         msleep(100);
1587
1588                         continue;
1589                 }
1590                 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1591
1592                 /* Allocate ioctl related memory. */
1593                 if (qla2x00_alloc_ioctl_mem(ha)) {
1594                         qla_printk(KERN_WARNING, ha,
1595                             "Memory Allocation failed - ioctl_mem\n");
1596
1597                         qla2x00_mem_free(ha);
1598                         msleep(100);
1599
1600                         continue;
1601                 }
1602
1603                 if (qla2x00_allocate_sp_pool(ha)) {
1604                         qla_printk(KERN_WARNING, ha,
1605                             "Memory Allocation failed - "
1606                             "qla2x00_allocate_sp_pool()\n");
1607
1608                         qla2x00_mem_free(ha);
1609                         msleep(100);
1610
1611                         continue;
1612                 }
1613
1614                 /* Allocate memory for SNS commands */
1615                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1616                         /* Get consistent memory allocated for SNS commands */
1617                         ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1618                             sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1619                             GFP_KERNEL);
1620                         if (ha->sns_cmd == NULL) {
1621                                 /* error */
1622                                 qla_printk(KERN_WARNING, ha,
1623                                     "Memory Allocation failed - sns_cmd\n");
1624
1625                                 qla2x00_mem_free(ha);
1626                                 msleep(100);
1627
1628                                 continue;
1629                         }
1630                         memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1631                 } else {
1632                         /* Get consistent memory allocated for MS IOCB */
1633                         ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1634                             &ha->ms_iocb_dma);
1635                         if (ha->ms_iocb == NULL) {
1636                                 /* error */
1637                                 qla_printk(KERN_WARNING, ha,
1638                                     "Memory Allocation failed - ms_iocb\n");
1639
1640                                 qla2x00_mem_free(ha);
1641                                 msleep(100);
1642
1643                                 continue;
1644                         }
1645                         memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1646
1647                         /*
1648                          * Get consistent memory allocated for CT SNS
1649                          * commands
1650                          */
1651                         ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1652                             sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1653                             GFP_KERNEL);
1654                         if (ha->ct_sns == NULL) {
1655                                 /* error */
1656                                 qla_printk(KERN_WARNING, ha,
1657                                     "Memory Allocation failed - ct_sns\n");
1658
1659                                 qla2x00_mem_free(ha);
1660                                 msleep(100);
1661
1662                                 continue;
1663                         }
1664                         memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1665                 }
1666
1667                 /* Done all allocations without any error. */
1668                 status = 0;
1669
1670         } while (retry-- && status != 0);
1671
1672         if (status) {
1673                 printk(KERN_WARNING
1674                         "%s(): **** FAILED ****\n", __func__);
1675         }
1676
1677         return(status);
1678 }
1679
1680 /*
1681 * qla2x00_mem_free
1682 *      Frees all adapter allocated memory.
1683 *
1684 * Input:
1685 *      ha = adapter block pointer.
1686 */
1687 static void
1688 qla2x00_mem_free(scsi_qla_host_t *ha)
1689 {
1690         struct list_head        *fcpl, *fcptemp;
1691         fc_port_t       *fcport;
1692         unsigned long   wtime;/* max wait time if mbx cmd is busy. */
1693
1694         if (ha == NULL) {
1695                 /* error */
1696                 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1697                 return;
1698         }
1699
1700         /* Make sure all other threads are stopped. */
1701         wtime = 60 * HZ;
1702         while (ha->dpc_wait && wtime) {
1703                 set_current_state(TASK_INTERRUPTIBLE);
1704                 wtime = schedule_timeout(wtime);
1705         }
1706
1707         /* free ioctl memory */
1708         qla2x00_free_ioctl_mem(ha);
1709
1710         /* free sp pool */
1711         qla2x00_free_sp_pool(ha);
1712
1713         if (ha->sns_cmd)
1714                 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1715                     ha->sns_cmd, ha->sns_cmd_dma);
1716
1717         if (ha->ct_sns)
1718                 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1719                     ha->ct_sns, ha->ct_sns_dma);
1720
1721         if (ha->ms_iocb)
1722                 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1723
1724         if (ha->iodesc_pd)
1725                 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1726
1727         if (ha->init_cb)
1728                 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1729
1730         if (ha->s_dma_pool)
1731                 dma_pool_destroy(ha->s_dma_pool);
1732
1733         if (ha->rlc_rsp)
1734                 dma_free_coherent(&ha->pdev->dev,
1735                     sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1736                     ha->rlc_rsp_dma);
1737
1738         if (ha->gid_list)
1739                 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1740                     ha->gid_list_dma);
1741
1742         if (ha->response_ring)
1743                 dma_free_coherent(&ha->pdev->dev,
1744                     (ha->response_q_length + 1) * sizeof(response_t),
1745                     ha->response_ring, ha->response_dma);
1746
1747         if (ha->request_ring)
1748                 dma_free_coherent(&ha->pdev->dev,
1749                     (ha->request_q_length + 1) * sizeof(request_t),
1750                     ha->request_ring, ha->request_dma);
1751
1752         ha->sns_cmd = NULL;
1753         ha->sns_cmd_dma = 0;
1754         ha->ct_sns = NULL;
1755         ha->ct_sns_dma = 0;
1756         ha->ms_iocb = NULL;
1757         ha->ms_iocb_dma = 0;
1758         ha->iodesc_pd = NULL;
1759         ha->iodesc_pd_dma = 0;
1760         ha->init_cb = NULL;
1761         ha->init_cb_dma = 0;
1762
1763         ha->s_dma_pool = NULL;
1764
1765         ha->rlc_rsp = NULL;
1766         ha->rlc_rsp_dma = 0;
1767         ha->gid_list = NULL;
1768         ha->gid_list_dma = 0;
1769
1770         ha->response_ring = NULL;
1771         ha->response_dma = 0;
1772         ha->request_ring = NULL;
1773         ha->request_dma = 0;
1774
1775         list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1776                 fcport = list_entry(fcpl, fc_port_t, list);
1777
1778                 /* fc ports */
1779                 list_del_init(&fcport->list);
1780                 kfree(fcport);
1781         }
1782         INIT_LIST_HEAD(&ha->fcports);
1783
1784         if (ha->fw_dump)
1785                 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1786
1787         if (ha->fw_dump_buffer)
1788                 vfree(ha->fw_dump_buffer);
1789
1790         ha->fw_dump = NULL;
1791         ha->fw_dump_reading = 0;
1792         ha->fw_dump_buffer = NULL;
1793 }
1794
1795 /*
1796  * qla2x00_allocate_sp_pool
1797  *       This routine is called during initialization to allocate
1798  *       memory for local srb_t.
1799  *
1800  * Input:
1801  *       ha   = adapter block pointer.
1802  *
1803  * Context:
1804  *      Kernel context.
1805  *
1806  * Note: Sets the ref_count for non Null sp to one.
1807  */
1808 static int
1809 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1810 {
1811         int      rval;
1812
1813         rval = QLA_SUCCESS;
1814         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1815             mempool_free_slab, srb_cachep);
1816         if (ha->srb_mempool == NULL) {
1817                 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1818                 rval = QLA_FUNCTION_FAILED;
1819         }
1820         return (rval);
1821 }
1822
1823 /*
1824  *  This routine frees all adapter allocated memory.
1825  *
1826  */
1827 static void
1828 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1829 {
1830         if (ha->srb_mempool) {
1831                 mempool_destroy(ha->srb_mempool);
1832                 ha->srb_mempool = NULL;
1833         }
1834 }
1835
1836 /**************************************************************************
1837 * qla2x00_do_dpc
1838 *   This kernel thread is a task that is schedule by the interrupt handler
1839 *   to perform the background processing for interrupts.
1840 *
1841 * Notes:
1842 * This task always run in the context of a kernel thread.  It
1843 * is kick-off by the driver's detect code and starts up
1844 * up one per adapter. It immediately goes to sleep and waits for
1845 * some fibre event.  When either the interrupt handler or
1846 * the timer routine detects a event it will one of the task
1847 * bits then wake us up.
1848 **************************************************************************/
1849 static int
1850 qla2x00_do_dpc(void *data)
1851 {
1852         DECLARE_MUTEX_LOCKED(sem);
1853         scsi_qla_host_t *ha;
1854         fc_port_t       *fcport;
1855         uint8_t         status;
1856         uint16_t        next_loopid;
1857
1858         ha = (scsi_qla_host_t *)data;
1859
1860         lock_kernel();
1861
1862         daemonize("%s_dpc", ha->host_str);
1863         allow_signal(SIGHUP);
1864
1865         ha->dpc_wait = &sem;
1866
1867         set_user_nice(current, -20);
1868
1869         unlock_kernel();
1870
1871         complete(&ha->dpc_inited);
1872
1873         while (1) {
1874                 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1875
1876                 if (down_interruptible(&sem))
1877                         break;
1878
1879                 if (ha->dpc_should_die)
1880                         break;
1881
1882                 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1883
1884                 /* Initialization not yet finished. Don't do anything yet. */
1885                 if (!ha->flags.init_done || ha->dpc_active)
1886                         continue;
1887
1888                 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1889
1890                 ha->dpc_active = 1;
1891
1892                 if (ha->flags.mbox_busy) {
1893                         ha->dpc_active = 0;
1894                         continue;
1895                 }
1896
1897                 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1898
1899                         DEBUG(printk("scsi(%ld): dpc: sched "
1900                             "qla2x00_abort_isp ha = %p\n",
1901                             ha->host_no, ha));
1902                         if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1903                             &ha->dpc_flags))) {
1904
1905                                 if (qla2x00_abort_isp(ha)) {
1906                                         /* failed. retry later */
1907                                         set_bit(ISP_ABORT_NEEDED,
1908                                             &ha->dpc_flags);
1909                                 }
1910                                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1911                         }
1912                         DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1913                             ha->host_no));
1914                 }
1915
1916                 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1917                     (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1918
1919                         DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1920                             ha->host_no));
1921
1922                         qla2x00_rst_aen(ha);
1923                         clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1924                 }
1925
1926                 /* Retry each device up to login retry count */
1927                 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1928                     !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1929                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
1930
1931                         DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
1932                             ha->host_no));
1933
1934                         next_loopid = 0;
1935                         list_for_each_entry(fcport, &ha->fcports, list) {
1936                                 if (fcport->port_type != FCT_TARGET)
1937                                         continue;
1938
1939                                 /*
1940                                  * If the port is not ONLINE then try to login
1941                                  * to it if we haven't run out of retries.
1942                                  */
1943                                 if (atomic_read(&fcport->state) != FCS_ONLINE &&
1944                                     fcport->login_retry) {
1945
1946                                         fcport->login_retry--;
1947                                         if (fcport->flags & FCF_FABRIC_DEVICE) {
1948                                                 if (fcport->flags &
1949                                                     FCF_TAPE_PRESENT)
1950                                                         qla2x00_fabric_logout(
1951                                                             ha,
1952                                                             fcport->loop_id);
1953                                                 status = qla2x00_fabric_login(
1954                                                     ha, fcport, &next_loopid);
1955                                         } else
1956                                                 status =
1957                                                     qla2x00_local_device_login(
1958                                                         ha, fcport->loop_id);
1959
1960                                         if (status == QLA_SUCCESS) {
1961                                                 fcport->old_loop_id = fcport->loop_id;
1962
1963                                                 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
1964                                                     ha->host_no, fcport->loop_id));
1965
1966                                                 fcport->port_login_retry_count =
1967                                                     ha->port_down_retry_count * PORT_RETRY_TIME;
1968                                                 atomic_set(&fcport->state, FCS_ONLINE);
1969                                                 atomic_set(&fcport->port_down_timer,
1970                                                     ha->port_down_retry_count * PORT_RETRY_TIME);
1971
1972                                                 fcport->login_retry = 0;
1973                                         } else if (status == 1) {
1974                                                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1975                                                 /* retry the login again */
1976                                                 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
1977                                                     ha->host_no,
1978                                                     fcport->login_retry, fcport->loop_id));
1979                                         } else {
1980                                                 fcport->login_retry = 0;
1981                                         }
1982                                 }
1983                                 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
1984                                         break;
1985                         }
1986                         DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
1987                             ha->host_no));
1988                 }
1989
1990                 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
1991                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
1992
1993                         clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
1994                         DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
1995                             ha->host_no));
1996
1997                         set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
1998
1999                         DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2000                             ha->host_no));
2001                 }
2002
2003                 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2004
2005                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2006                             ha->host_no));
2007
2008                         if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2009                             &ha->dpc_flags))) {
2010
2011                                 qla2x00_loop_resync(ha);
2012
2013                                 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2014                         }
2015
2016                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2017                             ha->host_no));
2018                 }
2019
2020                 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2021
2022                         DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2023                             ha->host_no));
2024
2025                         qla2x00_rescan_fcports(ha);
2026
2027                         DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2028                             "end.\n",
2029                             ha->host_no));
2030                 }
2031
2032                 if (!ha->interrupts_on)
2033                         qla2x00_enable_intrs(ha);
2034
2035                 ha->dpc_active = 0;
2036         } /* End of while(1) */
2037
2038         DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2039
2040         /*
2041          * Make sure that nobody tries to wake us up again.
2042          */
2043         ha->dpc_wait = NULL;
2044         ha->dpc_active = 0;
2045
2046         complete_and_exit(&ha->dpc_exited, 0);
2047 }
2048
2049 /*
2050 *  qla2x00_rst_aen
2051 *      Processes asynchronous reset.
2052 *
2053 * Input:
2054 *      ha  = adapter block pointer.
2055 */
2056 static void
2057 qla2x00_rst_aen(scsi_qla_host_t *ha)
2058 {
2059         if (ha->flags.online && !ha->flags.reset_active &&
2060             !atomic_read(&ha->loop_down_timer) &&
2061             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2062                 do {
2063                         clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2064
2065                         /*
2066                          * Issue marker command only when we are going to start
2067                          * the I/O.
2068                          */
2069                         ha->marker_needed = 1;
2070                 } while (!atomic_read(&ha->loop_down_timer) &&
2071                     (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2072         }
2073 }
2074
2075
2076 /*
2077  * This routine will allocate SP from the free queue
2078  * input:
2079  *        scsi_qla_host_t *
2080  * output:
2081  *        srb_t * or NULL
2082  */
2083 static srb_t *
2084 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2085 {
2086         srb_t *sp;
2087
2088         sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2089         if (sp)
2090                 atomic_set(&sp->ref_count, 1);
2091         return (sp);
2092 }
2093
2094 static void
2095 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2096 {
2097         struct scsi_cmnd *cmd = sp->cmd;
2098
2099         if (sp->flags & SRB_DMA_VALID) {
2100                 if (cmd->use_sg) {
2101                         dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2102                             cmd->use_sg, cmd->sc_data_direction);
2103                 } else if (cmd->request_bufflen) {
2104                         dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2105                             cmd->request_bufflen, cmd->sc_data_direction);
2106                 }
2107                 sp->flags &= ~SRB_DMA_VALID;
2108         }
2109 }
2110
2111 void
2112 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2113 {
2114         struct scsi_cmnd *cmd = sp->cmd;
2115
2116         qla2x00_sp_free_dma(ha, sp);
2117
2118         CMD_SP(cmd) = NULL;
2119         mempool_free(sp, ha->srb_mempool);
2120
2121         cmd->scsi_done(cmd);
2122 }
2123
2124 /**************************************************************************
2125 *   qla2x00_timer
2126 *
2127 * Description:
2128 *   One second timer
2129 *
2130 * Context: Interrupt
2131 ***************************************************************************/
2132 static void
2133 qla2x00_timer(scsi_qla_host_t *ha)
2134 {
2135         unsigned long   cpu_flags = 0;
2136         fc_port_t       *fcport;
2137         int             start_dpc = 0;
2138         int             index;
2139         srb_t           *sp;
2140         int             t;
2141
2142         /*
2143          * Ports - Port down timer.
2144          *
2145          * Whenever, a port is in the LOST state we start decrementing its port
2146          * down timer every second until it reaches zero. Once  it reaches zero
2147          * the port it marked DEAD.
2148          */
2149         t = 0;
2150         list_for_each_entry(fcport, &ha->fcports, list) {
2151                 if (fcport->port_type != FCT_TARGET)
2152                         continue;
2153
2154                 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2155
2156                         if (atomic_read(&fcport->port_down_timer) == 0)
2157                                 continue;
2158
2159                         if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2160                                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2161
2162                         DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2163                             "%d remainning\n",
2164                             ha->host_no,
2165                             t, atomic_read(&fcport->port_down_timer)));
2166                 }
2167                 t++;
2168         } /* End of for fcport  */
2169
2170
2171         /* Loop down handler. */
2172         if (atomic_read(&ha->loop_down_timer) > 0 &&
2173             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2174
2175                 if (atomic_read(&ha->loop_down_timer) ==
2176                     ha->loop_down_abort_time) {
2177
2178                         DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2179                             "queues before time expire\n",
2180                             ha->host_no));
2181
2182                         if (!IS_QLA2100(ha) && ha->link_down_timeout)
2183                                 atomic_set(&ha->loop_state, LOOP_DEAD);
2184
2185                         /* Schedule an ISP abort to return any tape commands. */
2186                         spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2187                         for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2188                             index++) {
2189                                 fc_port_t *sfcp;
2190
2191                                 sp = ha->outstanding_cmds[index];
2192                                 if (!sp)
2193                                         continue;
2194                                 sfcp = sp->fcport;
2195                                 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2196                                         continue;
2197
2198                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2199                                 break;
2200                         }
2201                         spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2202
2203                         set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2204                         start_dpc++;
2205                 }
2206
2207                 /* if the loop has been down for 4 minutes, reinit adapter */
2208                 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2209                         DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2210                             "restarting queues.\n",
2211                             ha->host_no));
2212
2213                         set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2214                         start_dpc++;
2215
2216                         if (!(ha->device_flags & DFLG_NO_CABLE)) {
2217                                 DEBUG(printk("scsi(%ld): Loop down - "
2218                                     "aborting ISP.\n",
2219                                     ha->host_no));
2220                                 qla_printk(KERN_WARNING, ha,
2221                                     "Loop down - aborting ISP.\n");
2222
2223                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2224                         }
2225                 }
2226                 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2227                     ha->host_no,
2228                     atomic_read(&ha->loop_down_timer)));
2229         }
2230
2231         /* Schedule the DPC routine if needed */
2232         if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2233             test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2234             start_dpc ||
2235             test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2236             test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2237             test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2238             ha->dpc_wait && !ha->dpc_active) {
2239
2240                 up(ha->dpc_wait);
2241         }
2242
2243         qla2x00_restart_timer(ha, WATCH_INTERVAL);
2244 }
2245
2246 /* XXX(hch): crude hack to emulate a down_timeout() */
2247 int
2248 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2249 {
2250         const unsigned int step = HZ/10;
2251
2252         do {
2253                 if (!down_trylock(sema))
2254                         return 0;
2255                 set_current_state(TASK_INTERRUPTIBLE);
2256                 if (schedule_timeout(step))
2257                         break;
2258         } while ((timeout -= step) > 0);
2259
2260         return -ETIMEDOUT;
2261 }
2262
2263 /**
2264  * qla2x00_module_init - Module initialization.
2265  **/
2266 static int __init
2267 qla2x00_module_init(void)
2268 {
2269         /* Allocate cache for SRBs. */
2270         srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
2271             SLAB_HWCACHE_ALIGN, NULL, NULL);
2272         if (srb_cachep == NULL) {
2273                 printk(KERN_ERR
2274                     "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2275                 return -ENOMEM;
2276         }
2277
2278         /* Derive version string. */
2279         strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2280 #if DEBUG_QLA2100
2281         strcat(qla2x00_version_str, "-debug");
2282 #endif
2283         qla2xxx_transport_template =
2284             fc_attach_transport(&qla2xxx_transport_functions);
2285         if (!qla2xxx_transport_template)
2286                 return -ENODEV;
2287
2288         printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2289         return 0;
2290 }
2291
2292 /**
2293  * qla2x00_module_exit - Module cleanup.
2294  **/
2295 static void __exit
2296 qla2x00_module_exit(void)
2297 {
2298         kmem_cache_destroy(srb_cachep);
2299         fc_release_transport(qla2xxx_transport_template);
2300 }
2301
2302 module_init(qla2x00_module_init);
2303 module_exit(qla2x00_module_exit);
2304
2305 MODULE_AUTHOR("QLogic Corporation");
2306 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2307 MODULE_LICENSE("GPL");
2308 MODULE_VERSION(QLA2XXX_VERSION);