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 char srb_cachep_name[16];
  40 kmem_cache_t *srb_cachep;
  41
  42 /*
  43  * Stats for all adpaters.
  44  */
  45 struct _qla2x00stats qla2x00_stats;
  46
  47 /*
  48  * Ioctl related information.
  49  */
  50 int num_hosts;
  51 int apiHBAInstance;
  52
  53 /*
  54  * Module parameter information and variables
  55  */
  56 int ql2xmaxqdepth;
  57 module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
  58 MODULE_PARM_DESC(ql2xmaxqdepth,
  59                 "Maximum queue depth to report for target devices.");
  60
  61 int ql2xlogintimeout = 20;
  62 module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
  63 MODULE_PARM_DESC(ql2xlogintimeout,
  64                 "Login timeout value in seconds.");
  65
  66 int qlport_down_retry = 30;
  67 module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
  68 MODULE_PARM_DESC(qlport_down_retry,
  69                 "Maximum number of command retries to a port that returns"
  70                 "a PORT-DOWN status.");
  71
  72 int ql2xretrycount = 20;
  73 module_param(ql2xretrycount, int, S_IRUGO|S_IWUSR);
  74 MODULE_PARM_DESC(ql2xretrycount,
  75                 "Maximum number of mid-layer retries allowed for a command.  "
  76                 "Default value is 20, ");
  77
  78 int ql2xplogiabsentdevice;
  79 module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
  80 MODULE_PARM_DESC(ql2xplogiabsentdevice,
  81                 "Option to enable PLOGI to devices that are not present after "
  82                 "a Fabric scan.  This is needed for several broken switches."
  83                 "Default is 0 - no PLOGI. 1 - perfom PLOGI.");
  84
  85 int ql2xenablezio = 0;
  86 module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
  87 MODULE_PARM_DESC(ql2xenablezio,
  88                 "Option to enable ZIO:If 1 then enable it otherwise"
  89                 " use the default set in the NVRAM."
  90                 " Default is 0 : disabled");
  91
  92 int ql2xintrdelaytimer = 10;
  93 module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
  94 MODULE_PARM_DESC(ql2xintrdelaytimer,
  95                 "ZIO: Waiting time for Firmware before it generates an "
  96                 "interrupt to the host to notify completion of request.");
  97
  98 int ConfigRequired;
  99 module_param(ConfigRequired, int, S_IRUGO|S_IRUSR);
 100 MODULE_PARM_DESC(ConfigRequired,
 101                 "If 1, then only configured devices passed in through the"
 102                 "ql2xopts parameter will be presented to the OS");
 103
 104 int Bind = BIND_BY_PORT_NAME;
 105 module_param(Bind, int, S_IRUGO|S_IRUSR);
 106 MODULE_PARM_DESC(Bind,
 107                 "Target persistent binding method: "
 108                 "0 by Portname (default); 1 by PortID; 2 by Nodename. ");
 109
 110 int ql2xsuspendcount = SUSPEND_COUNT;
 111 module_param(ql2xsuspendcount, int, S_IRUGO|S_IWUSR);
 112 MODULE_PARM_DESC(ql2xsuspendcount,
 113                 "Number of 6-second suspend iterations to perform while a "
 114                 "target returns a <NOT READY> status.  Default is 10 "
 115                 "iterations.");
 116
 117 int ql2xloginretrycount = 0;
 118 module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
 119 MODULE_PARM_DESC(ql2xloginretrycount,
 120                 "Specify an alternate value for the NVRAM login retry count.");
 121
 122 static void qla2x00_free_device(scsi_qla_host_t *);
 123
 124 static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
 125
 126 /*
 127  * SCSI host template entry points
 128  */
 129 static int qla2xxx_slave_configure(struct scsi_device * device);
 130 static int qla2xxx_slave_alloc(struct scsi_device *);
 131 static void qla2xxx_slave_destroy(struct scsi_device *);
 132 static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
 133                 void (*fn)(struct scsi_cmnd *));
 134 static int qla2xxx_eh_abort(struct scsi_cmnd *);
 135 static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
 136 static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
 137 static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
 138 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
 139 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
 140
 141 static struct scsi_host_template qla2x00_driver_template = {
 142         .module                 = THIS_MODULE,
 143         .name                   = "qla2xxx",
 144         .queuecommand           = qla2x00_queuecommand,
 145
 146         .eh_abort_handler       = qla2xxx_eh_abort,
 147         .eh_device_reset_handler = qla2xxx_eh_device_reset,
 148         .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
 149         .eh_host_reset_handler  = qla2xxx_eh_host_reset,
 150
 151         .slave_configure        = qla2xxx_slave_configure,
 152
 153         .slave_alloc            = qla2xxx_slave_alloc,
 154         .slave_destroy          = qla2xxx_slave_destroy,
 155         .this_id                = -1,
 156         .cmd_per_lun            = 3,
 157         .use_clustering         = ENABLE_CLUSTERING,
 158         .sg_tablesize           = SG_ALL,
 159
 160         /*
 161          * The RISC allows for each command to transfer (2^32-1) bytes of data,
 162          * which equates to 0x800000 sectors.
 163          */
 164         .max_sectors            = 0xFFFF,
 165 };
 166
 167 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
 168
 169 /* TODO Convert to inlines
 170  *
 171  * Timer routines
 172  */
 173 #define WATCH_INTERVAL          1       /* number of seconds */
 174
 175 static void qla2x00_timer(scsi_qla_host_t *);
 176
 177 static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
 178     void *, unsigned long);
 179 static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
 180 static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
 181
 182 static inline void
 183 qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
 184 {
 185         init_timer(&ha->timer);
 186         ha->timer.expires = jiffies + interval * HZ;
 187         ha->timer.data = (unsigned long)ha;
 188         ha->timer.function = (void (*)(unsigned long))func;
 189         add_timer(&ha->timer);
 190         ha->timer_active = 1;
 191 }
 192
 193 static inline void
 194 qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
 195 {
 196         mod_timer(&ha->timer, jiffies + interval * HZ);
 197 }
 198
 199 static __inline__ void
 200 qla2x00_stop_timer(scsi_qla_host_t *ha)
 201 {
 202         del_timer_sync(&ha->timer);
 203         ha->timer_active = 0;
 204 }
 205
 206 static int qla2x00_do_dpc(void *data);
 207
 208 static void qla2x00_rst_aen(scsi_qla_host_t *);
 209
 210 static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
 211 static void qla2x00_mem_free(scsi_qla_host_t *ha);
 212 static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
 213 static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
 214 static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
 215 static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
 216 void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
 217
 218 /* -------------------------------------------------------------------------- */
 219
 220 static char *
 221 qla2x00_get_pci_info_str(struct scsi_qla_host *ha, char *str)
 222 {
 223         static char *pci_bus_modes[] = {
 224                 "33", "66", "100", "133",
 225         };
 226         uint16_t pci_bus;
 227
 228         strcpy(str, "PCI");
 229         pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
 230         if (pci_bus) {
 231                 strcat(str, "-X (");
 232                 strcat(str, pci_bus_modes[pci_bus]);
 233         } else {
 234                 pci_bus = (ha->pci_attr & BIT_8) >> 8;
 235                 strcat(str, " (");
 236                 strcat(str, pci_bus_modes[pci_bus]);
 237         }
 238         strcat(str, " MHz)");
 239
 240         return (str);
 241 }
 242
 243 char *
 244 qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
 245 {
 246         char un_str[10];
 247
 248         sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
 249             ha->fw_minor_version,
 250             ha->fw_subminor_version);
 251
 252         if (ha->fw_attributes & BIT_9) {
 253                 strcat(str, "FLX");
 254                 return (str);
 255         }
 256
 257         switch (ha->fw_attributes & 0xFF) {
 258         case 0x7:
 259                 strcat(str, "EF");
 260                 break;
 261         case 0x17:
 262                 strcat(str, "TP");
 263                 break;
 264         case 0x37:
 265                 strcat(str, "IP");
 266                 break;
 267         case 0x77:
 268                 strcat(str, "VI");
 269                 break;
 270         default:
 271                 sprintf(un_str, "(%x)", ha->fw_attributes);
 272                 strcat(str, un_str);
 273                 break;
 274         }
 275         if (ha->fw_attributes & 0x100)
 276                 strcat(str, "X");
 277
 278         return (str);
 279 }
 280
 281 /**************************************************************************
 282 * qla2x00_queuecommand
 283 *
 284 * Description:
 285 *     Queue a command to the controller.
 286 *
 287 * Input:
 288 *     cmd - pointer to Scsi cmd structure
 289 *     fn - pointer to Scsi done function
 290 *
 291 * Returns:
 292 *   0 - Always
 293 *
 294 * Note:
 295 * The mid-level driver tries to ensures that queuecommand never gets invoked
 296 * concurrently with itself or the interrupt handler (although the
 297 * interrupt handler may call this routine as part of request-completion
 298 * handling).
 299 **************************************************************************/
 300 static int
 301 qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 302 {
 303         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 304         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 305         srb_t *sp;
 306         int rval;
 307
 308         if (!fcport) {
 309                 cmd->result = DID_NO_CONNECT << 16;
 310                 goto qc_fail_command;
 311         }
 312
 313         if (atomic_read(&fcport->state) != FCS_ONLINE) {
 314                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
 315                     atomic_read(&ha->loop_state) == LOOP_DEAD) {
 316                         cmd->result = DID_NO_CONNECT << 16;
 317                         goto qc_fail_command;
 318                 }
 319                 goto qc_host_busy;
 320         }
 321
 322         spin_unlock_irq(ha->host->host_lock);
 323
 324         /* Allocate a command packet from the "sp" pool. */
 325         if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
 326                 goto qc_host_busy_lock;
 327         }
 328
 329         sp->ha = ha;
 330         sp->fcport = fcport;
 331         sp->cmd = cmd;
 332         sp->flags = 0;
 333         sp->err_id = 0;
 334
 335         CMD_SP(cmd) = (void *)sp;
 336         cmd->scsi_done = done;
 337
 338         rval = qla2x00_start_scsi(sp);
 339         if (rval != QLA_SUCCESS)
 340                 goto qc_host_busy_free_sp;
 341
 342         /* Manage unprocessed RIO/ZIO commands in response queue. */
 343         if (ha->flags.online && ha->flags.process_response_queue &&
 344             ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
 345                 unsigned long flags;
 346
 347                 spin_lock_irqsave(&ha->hardware_lock, flags);
 348                 qla2x00_process_response_queue(ha);
 349                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 350         }
 351
 352         spin_lock_irq(ha->host->host_lock);
 353
 354         return 0;
 355
 356 qc_host_busy_free_sp:
 357         qla2x00_sp_free_dma(ha, sp);
 358         CMD_SP(cmd) = NULL;
 359         mempool_free(sp, ha->srb_mempool);
 360
 361 qc_host_busy_lock:
 362         spin_lock_irq(ha->host->host_lock);
 363
 364 qc_host_busy:
 365         return SCSI_MLQUEUE_HOST_BUSY;
 366
 367 qc_fail_command:
 368         done(cmd);
 369
 370         return 0;
 371 }
 372
 373 /*
 374  * qla2x00_eh_wait_on_command
 375  *    Waits for the command to be returned by the Firmware for some
 376  *    max time.
 377  *
 378  * Input:
 379  *    ha = actual ha whose done queue will contain the command
 380  *            returned by firmware.
 381  *    cmd = Scsi Command to wait on.
 382  *    flag = Abort/Reset(Bus or Device Reset)
 383  *
 384  * Return:
 385  *    Not Found : 0
 386  *    Found : 1
 387  */
 388 static int
 389 qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
 390 {
 391 #define ABORT_POLLING_PERIOD    HZ
 392 #define ABORT_WAIT_ITER         ((10 * HZ) / (ABORT_POLLING_PERIOD))
 393         unsigned long wait_iter = ABORT_WAIT_ITER;
 394         int ret = QLA_SUCCESS;
 395
 396         while (CMD_SP(cmd)) {
 397                 set_current_state(TASK_UNINTERRUPTIBLE);
 398                 schedule_timeout(ABORT_POLLING_PERIOD);
 399
 400                 if (--wait_iter)
 401                         break;
 402         }
 403         if (CMD_SP(cmd))
 404                 ret = QLA_FUNCTION_FAILED;
 405
 406         return ret;
 407 }
 408
 409 /*
 410  * qla2x00_wait_for_hba_online
 411  *    Wait till the HBA is online after going through
 412  *    <= MAX_RETRIES_OF_ISP_ABORT  or
 413  *    finally HBA is disabled ie marked offline
 414  *
 415  * Input:
 416  *     ha - pointer to host adapter structure
 417  *
 418  * Note:
 419  *    Does context switching-Release SPIN_LOCK
 420  *    (if any) before calling this routine.
 421  *
 422  * Return:
 423  *    Success (Adapter is online) : 0
 424  *    Failed  (Adapter is offline/disabled) : 1
 425  */
 426 static int
 427 qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
 428 {
 429         int      return_status;
 430         unsigned long wait_online;
 431
 432         wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
 433         while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
 434             test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
 435             test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
 436             ha->dpc_active) && time_before(jiffies, wait_online)) {
 437
 438                 msleep(1000);
 439         }
 440         if (ha->flags.online)
 441                 return_status = QLA_SUCCESS;
 442         else
 443                 return_status = QLA_FUNCTION_FAILED;
 444
 445         DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
 446
 447         return (return_status);
 448 }
 449
 450 /*
 451  * qla2x00_wait_for_loop_ready
 452  *    Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
 453  *    to be in LOOP_READY state.
 454  * Input:
 455  *     ha - pointer to host adapter structure
 456  *
 457  * Note:
 458  *    Does context switching-Release SPIN_LOCK
 459  *    (if any) before calling this routine.
 460  *
 461  *
 462  * Return:
 463  *    Success (LOOP_READY) : 0
 464  *    Failed  (LOOP_NOT_READY) : 1
 465  */
 466 static inline int
 467 qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
 468 {
 469         int      return_status = QLA_SUCCESS;
 470         unsigned long loop_timeout ;
 471
 472         /* wait for 5 min at the max for loop to be ready */
 473         loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);
 474
 475         while ((!atomic_read(&ha->loop_down_timer) &&
 476             atomic_read(&ha->loop_state) == LOOP_DOWN) ||
 477             test_bit(CFG_ACTIVE, &ha->cfg_flags) ||
 478             atomic_read(&ha->loop_state) != LOOP_READY) {
 479                 msleep(1000);
 480                 if (time_after_eq(jiffies, loop_timeout)) {
 481                         return_status = QLA_FUNCTION_FAILED;
 482                         break;
 483                 }
 484         }
 485         return (return_status);
 486 }
 487
 488 /**************************************************************************
 489 * qla2xxx_eh_abort
 490 *
 491 * Description:
 492 *    The abort function will abort the specified command.
 493 *
 494 * Input:
 495 *    cmd = Linux SCSI command packet to be aborted.
 496 *
 497 * Returns:
 498 *    Either SUCCESS or FAILED.
 499 *
 500 * Note:
 501 **************************************************************************/
 502 int
 503 qla2xxx_eh_abort(struct scsi_cmnd *cmd)
 504 {
 505         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 506         srb_t *sp;
 507         int ret, i;
 508         unsigned int id, lun;
 509         unsigned long serial;
 510         unsigned long flags;
 511
 512         if (!CMD_SP(cmd))
 513                 return FAILED;
 514
 515         ret = FAILED;
 516
 517         id = cmd->device->id;
 518         lun = cmd->device->lun;
 519         serial = cmd->serial_number;
 520
 521         /* Check active list for command command. */
 522         spin_unlock_irq(ha->host->host_lock);
 523         spin_lock_irqsave(&ha->hardware_lock, flags);
 524         for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
 525                 sp = ha->outstanding_cmds[i];
 526
 527                 if (sp == NULL)
 528                         continue;
 529
 530                 if (sp->cmd != cmd)
 531                         continue;
 532
 533                 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
 534                     "sp->state=%x\n", __func__, ha->host_no, sp, serial,
 535                     sp->state));
 536                 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
 537
 538                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 539                 if (qla2x00_abort_command(ha, sp)) {
 540                         DEBUG2(printk("%s(%ld): abort_command "
 541                             "mbx failed.\n", __func__, ha->host_no));
 542                 } else {
 543                         DEBUG3(printk("%s(%ld): abort_command "
 544                             "mbx success.\n", __func__, ha->host_no));
 545                         ret = SUCCESS;
 546                 }
 547                 spin_lock_irqsave(&ha->hardware_lock, flags);
 548
 549                 break;
 550         }
 551         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 552
 553         /* Wait for the command to be returned. */
 554         if (ret == SUCCESS) {
 555                 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
 556                         qla_printk(KERN_ERR, ha,
 557                             "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
 558                             "%x.\n", ha->host_no, id, lun, serial, ret);
 559                 }
 560         }
 561         spin_lock_irq(ha->host->host_lock);
 562
 563         qla_printk(KERN_INFO, ha,
 564             "scsi(%ld:%d:%d): Abort command issued -- %lx %x.\n", ha->host_no,
 565             id, lun, serial, ret);
 566
 567         return ret;
 568 }
 569
 570 /**************************************************************************
 571 * qla2x00_eh_wait_for_pending_target_commands
 572 *
 573 * Description:
 574 *    Waits for all the commands to come back from the specified target.
 575 *
 576 * Input:
 577 *    ha - pointer to scsi_qla_host structure.
 578 *    t  - target
 579 * Returns:
 580 *    Either SUCCESS or FAILED.
 581 *
 582 * Note:
 583 **************************************************************************/
 584 static int
 585 qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
 586 {
 587         int     cnt;
 588         int     status;
 589         srb_t           *sp;
 590         struct scsi_cmnd *cmd;
 591         unsigned long flags;
 592
 593         status = 0;
 594
 595         /*
 596          * Waiting for all commands for the designated target in the active
 597          * array
 598          */
 599         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 600                 spin_lock_irqsave(&ha->hardware_lock, flags);
 601                 sp = ha->outstanding_cmds[cnt];
 602                 if (sp) {
 603                         cmd = sp->cmd;
 604                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 605                         if (cmd->device->id == t) {
 606                                 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
 607                                         status = 1;
 608                                         break;
 609                                 }
 610                         }
 611                 } else {
 612                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 613                 }
 614         }
 615         return (status);
 616 }
 617
 618
 619 /**************************************************************************
 620 * qla2xxx_eh_device_reset
 621 *
 622 * Description:
 623 *    The device reset function will reset the target and abort any
 624 *    executing commands.
 625 *
 626 *    NOTE: The use of SP is undefined within this context.  Do *NOT*
 627 *          attempt to use this value, even if you determine it is
 628 *          non-null.
 629 *
 630 * Input:
 631 *    cmd = Linux SCSI command packet of the command that cause the
 632 *          bus device reset.
 633 *
 634 * Returns:
 635 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 636 *
 637 **************************************************************************/
 638 int
 639 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
 640 {
 641         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 642         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 643         srb_t *sp;
 644         int ret;
 645         unsigned int id, lun;
 646         unsigned long serial;
 647
 648         ret = FAILED;
 649
 650         id = cmd->device->id;
 651         lun = cmd->device->lun;
 652         serial = cmd->serial_number;
 653
 654         sp = (srb_t *) CMD_SP(cmd);
 655         if (!sp || !fcport)
 656                 return ret;
 657
 658         qla_printk(KERN_INFO, ha,
 659             "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
 660
 661         spin_unlock_irq(ha->host->host_lock);
 662
 663         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
 664                 spin_lock_irq(ha->host->host_lock);
 665                 goto eh_dev_reset_done;
 666         }
 667
 668         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 669                 if (qla2x00_device_reset(ha, fcport) == 0)
 670                         ret = SUCCESS;
 671
 672 #if defined(LOGOUT_AFTER_DEVICE_RESET)
 673                 if (ret == SUCCESS) {
 674                         if (fcport->flags & FC_FABRIC_DEVICE) {
 675                                 qla2x00_fabric_logout(ha, fcport->loop_id);
 676                                 qla2x00_mark_device_lost(ha, fcport);
 677                         }
 678                 }
 679 #endif
 680         } else {
 681                 DEBUG2(printk(KERN_INFO
 682                     "%s failed: loop not ready\n",__func__);)
 683         }
 684
 685         if (ret == FAILED) {
 686                 DEBUG3(printk("%s(%ld): device reset failed\n",
 687                     __func__, ha->host_no));
 688                 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
 689                     __func__);
 690
 691                 goto eh_dev_reset_done;
 692         }
 693
 694         /*
 695          * If we are coming down the EH path, wait for all commands to
 696          * complete for the device.
 697          */
 698         if (cmd->device->host->eh_active) {
 699                 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
 700                         ret = FAILED;
 701
 702                 if (ret == FAILED) {
 703                         DEBUG3(printk("%s(%ld): failed while waiting for "
 704                             "commands\n", __func__, ha->host_no));
 705                         qla_printk(KERN_INFO, ha,
 706                             "%s: failed while waiting for commands\n",
 707                             __func__);
 708
 709                         goto eh_dev_reset_done;
 710                 }
 711         }
 712
 713         qla_printk(KERN_INFO, ha,
 714             "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
 715
 716 eh_dev_reset_done:
 717         spin_lock_irq(ha->host->host_lock);
 718
 719         return ret;
 720 }
 721
 722 /**************************************************************************
 723 * qla2x00_eh_wait_for_pending_commands
 724 *
 725 * Description:
 726 *    Waits for all the commands to come back from the specified host.
 727 *
 728 * Input:
 729 *    ha - pointer to scsi_qla_host structure.
 730 *
 731 * Returns:
 732 *    1 : SUCCESS
 733 *    0 : FAILED
 734 *
 735 * Note:
 736 **************************************************************************/
 737 static int
 738 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
 739 {
 740         int     cnt;
 741         int     status;
 742         srb_t           *sp;
 743         struct scsi_cmnd *cmd;
 744         unsigned long flags;
 745
 746         status = 1;
 747
 748         /*
 749          * Waiting for all commands for the designated target in the active
 750          * array
 751          */
 752         for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
 753                 spin_lock_irqsave(&ha->hardware_lock, flags);
 754                 sp = ha->outstanding_cmds[cnt];
 755                 if (sp) {
 756                         cmd = sp->cmd;
 757                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758                         status = qla2x00_eh_wait_on_command(ha, cmd);
 759                         if (status == 0)
 760                                 break;
 761                 }
 762                 else {
 763                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 764                 }
 765         }
 766         return (status);
 767 }
 768
 769
 770 /**************************************************************************
 771 * qla2xxx_eh_bus_reset
 772 *
 773 * Description:
 774 *    The bus reset function will reset the bus and abort any executing
 775 *    commands.
 776 *
 777 * Input:
 778 *    cmd = Linux SCSI command packet of the command that cause the
 779 *          bus reset.
 780 *
 781 * Returns:
 782 *    SUCCESS/FAILURE (defined as macro in scsi.h).
 783 *
 784 **************************************************************************/
 785 int
 786 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
 787 {
 788         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 789         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 790         srb_t *sp;
 791         int ret;
 792         unsigned int id, lun;
 793         unsigned long serial;
 794
 795         ret = FAILED;
 796
 797         id = cmd->device->id;
 798         lun = cmd->device->lun;
 799         serial = cmd->serial_number;
 800
 801         sp = (srb_t *) CMD_SP(cmd);
 802         if (!sp || !fcport)
 803                 return ret;
 804
 805         qla_printk(KERN_INFO, ha,
 806             "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
 807
 808         spin_unlock_irq(ha->host->host_lock);
 809
 810         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
 811                 DEBUG2(printk("%s failed:board disabled\n",__func__));
 812                 goto eh_bus_reset_done;
 813         }
 814
 815         if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
 816                 if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
 817                         ret = SUCCESS;
 818         }
 819         if (ret == FAILED)
 820                 goto eh_bus_reset_done;
 821
 822         /* Waiting for our command in done_queue to be returned to OS.*/
 823         if (cmd->device->host->eh_active)
 824                 if (!qla2x00_eh_wait_for_pending_commands(ha))
 825                         ret = FAILED;
 826
 827 eh_bus_reset_done:
 828         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 829             (ret == FAILED) ? "failed" : "succeded");
 830
 831         spin_lock_irq(ha->host->host_lock);
 832
 833         return ret;
 834 }
 835
 836 /**************************************************************************
 837 * qla2xxx_eh_host_reset
 838 *
 839 * Description:
 840 *    The reset function will reset the Adapter.
 841 *
 842 * Input:
 843 *      cmd = Linux SCSI command packet of the command that cause the
 844 *            adapter reset.
 845 *
 846 * Returns:
 847 *      Either SUCCESS or FAILED.
 848 *
 849 * Note:
 850 **************************************************************************/
 851 int
 852 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
 853 {
 854         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
 855         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
 856         srb_t *sp;
 857         int ret;
 858         unsigned int id, lun;
 859         unsigned long serial;
 860
 861         ret = FAILED;
 862
 863         id = cmd->device->id;
 864         lun = cmd->device->lun;
 865         serial = cmd->serial_number;
 866
 867         sp = (srb_t *) CMD_SP(cmd);
 868         if (!sp || !fcport)
 869                 return ret;
 870
 871         qla_printk(KERN_INFO, ha,
 872             "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
 873
 874         spin_unlock_irq(ha->host->host_lock);
 875
 876         if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 877                 goto eh_host_reset_lock;
 878
 879         /*
 880          * Fixme-may be dpc thread is active and processing
 881          * loop_resync,so wait a while for it to
 882          * be completed and then issue big hammer.Otherwise
 883          * it may cause I/O failure as big hammer marks the
 884          * devices as lost kicking of the port_down_timer
 885          * while dpc is stuck for the mailbox to complete.
 886          */
 887         qla2x00_wait_for_loop_ready(ha);
 888         set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 889         if (qla2x00_abort_isp(ha)) {
 890                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 891                 /* failed. schedule dpc to try */
 892                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
 893
 894                 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
 895                         goto eh_host_reset_lock;
 896         }
 897         clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
 898
 899         /* Waiting for our command in done_queue to be returned to OS.*/
 900         if (qla2x00_eh_wait_for_pending_commands(ha))
 901                 ret = SUCCESS;
 902
 903 eh_host_reset_lock:
 904         spin_lock_irq(ha->host->host_lock);
 905
 906         qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
 907             (ret == FAILED) ? "failed" : "succeded");
 908
 909         return ret;
 910 }
 911
 912 /*
 913 * qla2x00_loop_reset
 914 *      Issue loop reset.
 915 *
 916 * Input:
 917 *      ha = adapter block pointer.
 918 *
 919 * Returns:
 920 *      0 = success
 921 */
 922 static int
 923 qla2x00_loop_reset(scsi_qla_host_t *ha)
 924 {
 925         int status = QLA_SUCCESS;
 926         struct fc_port *fcport;
 927
 928         if (ha->flags.enable_lip_reset) {
 929                 status = qla2x00_lip_reset(ha);
 930         }
 931
 932         if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
 933                 list_for_each_entry(fcport, &ha->fcports, list) {
 934                         if (fcport->port_type != FCT_TARGET)
 935                                 continue;
 936
 937                         status = qla2x00_target_reset(ha, fcport);
 938                         if (status != QLA_SUCCESS)
 939                                 break;
 940                 }
 941         }
 942
 943         if (status == QLA_SUCCESS &&
 944                 ((!ha->flags.enable_target_reset &&
 945                   !ha->flags.enable_lip_reset) ||
 946                 ha->flags.enable_lip_full_login)) {
 947
 948                 status = qla2x00_full_login_lip(ha);
 949         }
 950
 951         /* Issue marker command only when we are going to start the I/O */
 952         ha->marker_needed = 1;
 953
 954         if (status) {
 955                 /* Empty */
 956                 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
 957                                 __func__,
 958                                 ha->host_no);)
 959         } else {
 960                 /* Empty */
 961                 DEBUG3(printk("%s(%ld): exiting normally.\n",
 962                                 __func__,
 963                                 ha->host_no);)
 964         }
 965
 966         return(status);
 967 }
 968
 969 /*
 970  * qla2x00_device_reset
 971  *      Issue bus device reset message to the target.
 972  *
 973  * Input:
 974  *      ha = adapter block pointer.
 975  *      t = SCSI ID.
 976  *      TARGET_QUEUE_LOCK must be released.
 977  *      ADAPTER_STATE_LOCK must be released.
 978  *
 979  * Context:
 980  *      Kernel context.
 981  */
 982 static int
 983 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
 984 {
 985         /* Abort Target command will clear Reservation */
 986         return qla2x00_abort_target(reset_fcport);
 987 }
 988
 989 static int
 990 qla2xxx_slave_alloc(struct scsi_device *sdev)
 991 {
 992         scsi_qla_host_t *ha = to_qla_host(sdev->host);
 993         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 994         fc_port_t *fcport;
 995         int found;
 996
 997         if (!rport)
 998                 return -ENXIO;
 999
1000         found = 0;
1001         list_for_each_entry(fcport, &ha->fcports, list) {
1002                 if (rport->port_name ==
1003                     be64_to_cpu(*(uint64_t *)fcport->port_name)) {
1004                         found++;
1005                         break;
1006                 }
1007         }
1008         if (!found)
1009                 return -ENXIO;
1010
1011         sdev->hostdata = fcport;
1012
1013         return 0;
1014 }
1015
1016 static int
1017 qla2xxx_slave_configure(struct scsi_device *sdev)
1018 {
1019         scsi_qla_host_t *ha = to_qla_host(sdev->host);
1020         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1021
1022         if (sdev->tagged_supported)
1023                 scsi_activate_tcq(sdev, 32);
1024         else
1025                 scsi_deactivate_tcq(sdev, 32);
1026
1027         rport->dev_loss_tmo = ha->port_down_retry_count + 5;
1028
1029         return 0;
1030 }
1031
1032 static void
1033 qla2xxx_slave_destroy(struct scsi_device *sdev)
1034 {
1035         sdev->hostdata = NULL;
1036 }
1037
1038 /**
1039  * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
1040  * @ha: HA context
1041  *
1042  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1043  * supported addressing method.
1044  */
1045 static void
1046 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
1047 {
1048         /* Assume 32bit DMA address */
1049         ha->flags.enable_64bit_addressing = 0;
1050         ha->calc_request_entries = qla2x00_calc_iocbs_32;
1051         ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
1052
1053         /*
1054          * Given the two variants pci_set_dma_mask(), allow the compiler to
1055          * assist in setting the proper dma mask.
1056          */
1057         if (sizeof(dma_addr_t) > 4) {
1058                 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1059                         ha->flags.enable_64bit_addressing = 1;
1060                         ha->calc_request_entries = qla2x00_calc_iocbs_64;
1061                         ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
1062
1063                         if (pci_set_consistent_dma_mask(ha->pdev,
1064                             DMA_64BIT_MASK)) {
1065                                 qla_printk(KERN_DEBUG, ha,
1066                                     "Failed to set 64 bit PCI consistent mask; "
1067                                     "using 32 bit.\n");
1068                                 pci_set_consistent_dma_mask(ha->pdev,
1069                                     DMA_32BIT_MASK);
1070                         }
1071                 } else {
1072                         qla_printk(KERN_DEBUG, ha,
1073                             "Failed to set 64 bit PCI DMA mask, falling back "
1074                             "to 32 bit MASK.\n");
1075                         pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1076                 }
1077         } else {
1078                 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1079         }
1080 }
1081
1082 static int
1083 qla2x00_iospace_config(scsi_qla_host_t *ha)
1084 {
1085         unsigned long   pio, pio_len, pio_flags;
1086         unsigned long   mmio, mmio_len, mmio_flags;
1087
1088         /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1089         pio = pci_resource_start(ha->pdev, 0);
1090         pio_len = pci_resource_len(ha->pdev, 0);
1091         pio_flags = pci_resource_flags(ha->pdev, 0);
1092         if (pio_flags & IORESOURCE_IO) {
1093                 if (pio_len < MIN_IOBASE_LEN) {
1094                         qla_printk(KERN_WARNING, ha,
1095                             "Invalid PCI I/O region size (%s)...\n",
1096                                 pci_name(ha->pdev));
1097                         pio = 0;
1098                 }
1099         } else {
1100                 qla_printk(KERN_WARNING, ha,
1101                     "region #0 not a PIO resource (%s)...\n",
1102                     pci_name(ha->pdev));
1103                 pio = 0;
1104         }
1105
1106         /* Use MMIO operations for all accesses. */
1107         mmio = pci_resource_start(ha->pdev, 1);
1108         mmio_len = pci_resource_len(ha->pdev, 1);
1109         mmio_flags = pci_resource_flags(ha->pdev, 1);
1110
1111         if (!(mmio_flags & IORESOURCE_MEM)) {
1112                 qla_printk(KERN_ERR, ha,
1113                     "region #0 not an MMIO resource (%s), aborting\n",
1114                     pci_name(ha->pdev));
1115                 goto iospace_error_exit;
1116         }
1117         if (mmio_len < MIN_IOBASE_LEN) {
1118                 qla_printk(KERN_ERR, ha,
1119                     "Invalid PCI mem region size (%s), aborting\n",
1120                         pci_name(ha->pdev));
1121                 goto iospace_error_exit;
1122         }
1123
1124         if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1125                 qla_printk(KERN_WARNING, ha,
1126                     "Failed to reserve PIO/MMIO regions (%s)\n",
1127                     pci_name(ha->pdev));
1128
1129                 goto iospace_error_exit;
1130         }
1131
1132         ha->pio_address = pio;
1133         ha->pio_length = pio_len;
1134         ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1135         if (!ha->iobase) {
1136                 qla_printk(KERN_ERR, ha,
1137                     "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1138
1139                 goto iospace_error_exit;
1140         }
1141
1142         return (0);
1143
1144 iospace_error_exit:
1145         return (-ENOMEM);
1146 }
1147
1148 /*
1149  * PCI driver interface
1150  */
1151 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1152 {
1153         int     ret = -ENODEV;
1154         device_reg_t __iomem *reg;
1155         struct Scsi_Host *host;
1156         scsi_qla_host_t *ha;
1157         unsigned long   flags = 0;
1158         unsigned long   wait_switch = 0;
1159         char pci_info[20];
1160         char fw_str[30];
1161         fc_port_t *fcport;
1162
1163         if (pci_enable_device(pdev))
1164                 goto probe_out;
1165
1166         host = scsi_host_alloc(&qla2x00_driver_template,
1167             sizeof(scsi_qla_host_t));
1168         if (host == NULL) {
1169                 printk(KERN_WARNING
1170                     "qla2xxx: Couldn't allocate host from scsi layer!\n");
1171                 goto probe_disable_device;
1172         }
1173
1174         /* Clear our data area */
1175         ha = (scsi_qla_host_t *)host->hostdata;
1176         memset(ha, 0, sizeof(scsi_qla_host_t));
1177
1178         ha->pdev = pdev;
1179         ha->host = host;
1180         ha->host_no = host->host_no;
1181         ha->brd_info = brd_info;
1182         sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1183
1184         /* Configure PCI I/O space */
1185         ret = qla2x00_iospace_config(ha);
1186         if (ret)
1187                 goto probe_failed;
1188
1189         /* Sanitize the information from PCI BIOS. */
1190         host->irq = pdev->irq;
1191
1192         qla_printk(KERN_INFO, ha,
1193             "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1194             host->irq, ha->iobase);
1195
1196         spin_lock_init(&ha->hardware_lock);
1197
1198         /* 4.23 Initialize /proc/scsi/qla2x00 counters */
1199         ha->actthreads = 0;
1200         ha->qthreads   = 0;
1201         ha->total_isr_cnt = 0;
1202         ha->total_isp_aborts = 0;
1203         ha->total_lip_cnt = 0;
1204         ha->total_dev_errs = 0;
1205         ha->total_ios = 0;
1206         ha->total_bytes = 0;
1207
1208         ha->prev_topology = 0;
1209         ha->ports = MAX_BUSES;
1210
1211         if (IS_QLA2100(ha)) {
1212                 ha->max_targets = MAX_TARGETS_2100;
1213                 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1214                 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1215                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1216                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1217                 host->sg_tablesize = 32;
1218         } else if (IS_QLA2200(ha)) {
1219                 ha->max_targets = MAX_TARGETS_2200;
1220                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1221                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1222                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1223                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1224         } else /*if (IS_QLA2300(ha))*/ {
1225                 ha->max_targets = MAX_TARGETS_2200;
1226                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1227                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1228                 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1229                 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1230         }
1231         host->can_queue = ha->request_q_length + 128;
1232
1233         /* load the F/W, read paramaters, and init the H/W */
1234         ha->instance = num_hosts;
1235
1236         init_MUTEX(&ha->mbx_cmd_sem);
1237         init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1238
1239         INIT_LIST_HEAD(&ha->list);
1240         INIT_LIST_HEAD(&ha->fcports);
1241         INIT_LIST_HEAD(&ha->rscn_fcports);
1242
1243         /*
1244          * These locks are used to prevent more than one CPU
1245          * from modifying the queue at the same time. The
1246          * higher level "host_lock" will reduce most
1247          * contention for these locks.
1248          */
1249         spin_lock_init(&ha->mbx_reg_lock);
1250
1251         ha->dpc_pid = -1;
1252         init_completion(&ha->dpc_inited);
1253         init_completion(&ha->dpc_exited);
1254
1255         qla2x00_config_dma_addressing(ha);
1256         if (qla2x00_mem_alloc(ha)) {
1257                 qla_printk(KERN_WARNING, ha,
1258                     "[ERROR] Failed to allocate memory for adapter\n");
1259
1260                 ret = -ENOMEM;
1261                 goto probe_failed;
1262         }
1263
1264         if (qla2x00_initialize_adapter(ha) &&
1265             !(ha->device_flags & DFLG_NO_CABLE)) {
1266
1267                 qla_printk(KERN_WARNING, ha,
1268                     "Failed to initialize adapter\n");
1269
1270                 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1271                     "Adapter flags %x.\n",
1272                     ha->host_no, ha->device_flags));
1273
1274                 ret = -ENODEV;
1275                 goto probe_failed;
1276         }
1277
1278         /*
1279          * Startup the kernel thread for this host adapter
1280          */
1281         ha->dpc_should_die = 0;
1282         ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1283         if (ha->dpc_pid < 0) {
1284                 qla_printk(KERN_WARNING, ha,
1285                     "Unable to start DPC thread!\n");
1286
1287                 ret = -ENODEV;
1288                 goto probe_failed;
1289         }
1290         wait_for_completion(&ha->dpc_inited);
1291
1292         host->this_id = 255;
1293         host->cmd_per_lun = 3;
1294         host->unique_id = ha->instance;
1295         host->max_cmd_len = MAX_CMDSZ;
1296         host->max_channel = ha->ports - 1;
1297         host->max_lun = MAX_LUNS;
1298         host->transportt = qla2xxx_transport_template;
1299
1300         if (IS_QLA2100(ha) || IS_QLA2200(ha))
1301                 ret = request_irq(host->irq, qla2100_intr_handler,
1302                     SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1303         else
1304                 ret = request_irq(host->irq, qla2300_intr_handler,
1305                     SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1306         if (ret) {
1307                 qla_printk(KERN_WARNING, ha,
1308                     "Failed to reserve interrupt %d already in use.\n",
1309                     host->irq);
1310                 goto probe_failed;
1311         }
1312
1313         /* Initialized the timer */
1314         qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1315
1316         DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1317             ha->host_no, ha));
1318
1319         reg = ha->iobase;
1320
1321         /* Disable ISP interrupts. */
1322         qla2x00_disable_intrs(ha);
1323
1324         /* Ensure mailbox registers are free. */
1325         spin_lock_irqsave(&ha->hardware_lock, flags);
1326         WRT_REG_WORD(&reg->semaphore, 0);
1327         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1328         WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1329
1330         /* Enable proper parity */
1331         if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1332                 if (IS_QLA2300(ha))
1333                         /* SRAM parity */
1334                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1335                 else
1336                         /* SRAM, Instruction RAM and GP RAM parity */
1337                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1338         }
1339         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1340
1341         /* Enable chip interrupts. */
1342         qla2x00_enable_intrs(ha);
1343
1344         /* v2.19.5b6 */
1345         /*
1346          * Wait around max loop_reset_delay secs for the devices to come
1347          * on-line. We don't want Linux scanning before we are ready.
1348          *
1349          */
1350         for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1351             time_before(jiffies,wait_switch) &&
1352              !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1353              && (ha->device_flags & SWITCH_FOUND) ;) {
1354
1355                 qla2x00_check_fabric_devices(ha);
1356
1357                 msleep(10);
1358         }
1359
1360         pci_set_drvdata(pdev, ha);
1361         ha->flags.init_done = 1;
1362         num_hosts++;
1363
1364         ret = scsi_add_host(host, &pdev->dev);
1365         if (ret)
1366                 goto probe_failed;
1367
1368         qla2x00_alloc_sysfs_attr(ha);
1369
1370         qla2x00_init_host_attr(ha);
1371
1372         qla_printk(KERN_INFO, ha, "\n"
1373             " QLogic Fibre Channel HBA Driver: %s\n"
1374             "  QLogic %s - %s\n"
1375             "  %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1376             ha->model_number, ha->model_desc ? ha->model_desc: "",
1377             ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
1378             pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1379             ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
1380
1381         /* Go with fc_rport registration. */
1382         list_for_each_entry(fcport, &ha->fcports, list)
1383                 qla2x00_reg_remote_port(ha, fcport);
1384
1385         return 0;
1386
1387 probe_failed:
1388         fc_remove_host(ha->host);
1389
1390         qla2x00_free_device(ha);
1391
1392         scsi_host_put(host);
1393
1394 probe_disable_device:
1395         pci_disable_device(pdev);
1396
1397 probe_out:
1398         return ret;
1399 }
1400 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1401
1402 void qla2x00_remove_one(struct pci_dev *pdev)
1403 {
1404         scsi_qla_host_t *ha;
1405
1406         ha = pci_get_drvdata(pdev);
1407
1408         qla2x00_free_sysfs_attr(ha);
1409
1410         fc_remove_host(ha->host);
1411
1412         scsi_remove_host(ha->host);
1413
1414         qla2x00_free_device(ha);
1415
1416         scsi_host_put(ha->host);
1417
1418         pci_set_drvdata(pdev, NULL);
1419 }
1420 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1421
1422 static void
1423 qla2x00_free_device(scsi_qla_host_t *ha)
1424 {
1425         int ret;
1426
1427         /* Abort any outstanding IO descriptors. */
1428         if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1429                 qla2x00_cancel_io_descriptors(ha);
1430
1431         /* turn-off interrupts on the card */
1432         if (ha->interrupts_on)
1433                 qla2x00_disable_intrs(ha);
1434
1435         /* Disable timer */
1436         if (ha->timer_active)
1437                 qla2x00_stop_timer(ha);
1438
1439         /* Kill the kernel thread for this host */
1440         if (ha->dpc_pid >= 0) {
1441                 ha->dpc_should_die = 1;
1442                 wmb();
1443                 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1444                 if (ret) {
1445                         qla_printk(KERN_ERR, ha,
1446                             "Unable to signal DPC thread -- (%d)\n", ret);
1447
1448                         /* TODO: SOMETHING MORE??? */
1449                 } else {
1450                         wait_for_completion(&ha->dpc_exited);
1451                 }
1452         }
1453
1454         qla2x00_mem_free(ha);
1455
1456
1457         ha->flags.online = 0;
1458
1459         /* Detach interrupts */
1460         if (ha->pdev->irq)
1461                 free_irq(ha->pdev->irq, ha);
1462
1463         /* release io space registers  */
1464         if (ha->iobase)
1465                 iounmap(ha->iobase);
1466         pci_release_regions(ha->pdev);
1467
1468         pci_disable_device(ha->pdev);
1469 }
1470
1471 /*
1472  * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1473  *
1474  * Input: ha = adapter block pointer.  fcport = port structure pointer.
1475  *
1476  * Return: None.
1477  *
1478  * Context:
1479  */
1480 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1481     int do_login)
1482 {
1483         if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1484                 fc_remote_port_block(fcport->rport);
1485         /*
1486          * We may need to retry the login, so don't change the state of the
1487          * port but do the retries.
1488          */
1489         if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1490                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1491
1492         if (!do_login)
1493                 return;
1494
1495         if (fcport->login_retry == 0) {
1496                 fcport->login_retry = ha->login_retry_count;
1497                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1498
1499                 DEBUG(printk("scsi(%ld): Port login retry: "
1500                     "%02x%02x%02x%02x%02x%02x%02x%02x, "
1501                     "id = 0x%04x retry cnt=%d\n",
1502                     ha->host_no,
1503                     fcport->port_name[0],
1504                     fcport->port_name[1],
1505                     fcport->port_name[2],
1506                     fcport->port_name[3],
1507                     fcport->port_name[4],
1508                     fcport->port_name[5],
1509                     fcport->port_name[6],
1510                     fcport->port_name[7],
1511                     fcport->loop_id,
1512                     fcport->login_retry));
1513         }
1514 }
1515
1516 /*
1517  * qla2x00_mark_all_devices_lost
1518  *      Updates fcport state when device goes offline.
1519  *
1520  * Input:
1521  *      ha = adapter block pointer.
1522  *      fcport = port structure pointer.
1523  *
1524  * Return:
1525  *      None.
1526  *
1527  * Context:
1528  */
1529 void
1530 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1531 {
1532         fc_port_t *fcport;
1533
1534         list_for_each_entry(fcport, &ha->fcports, list) {
1535                 if (fcport->port_type != FCT_TARGET)
1536                         continue;
1537
1538                 /*
1539                  * No point in marking the device as lost, if the device is
1540                  * already DEAD.
1541                  */
1542                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1543                         continue;
1544                 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1545                         fc_remote_port_block(fcport->rport);
1546                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1547         }
1548 }
1549
1550 /*
1551 * qla2x00_mem_alloc
1552 *      Allocates adapter memory.
1553 *
1554 * Returns:
1555 *      0  = success.
1556 *      1  = failure.
1557 */
1558 static uint8_t
1559 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1560 {
1561         char    name[16];
1562         uint8_t   status = 1;
1563         int     retry= 10;
1564
1565         do {
1566                 /*
1567                  * This will loop only once if everything goes well, else some
1568                  * number of retries will be performed to get around a kernel
1569                  * bug where available mem is not allocated until after a
1570                  * little delay and a retry.
1571                  */
1572                 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1573                     (ha->request_q_length + 1) * sizeof(request_t),
1574                     &ha->request_dma, GFP_KERNEL);
1575                 if (ha->request_ring == NULL) {
1576                         qla_printk(KERN_WARNING, ha,
1577                             "Memory Allocation failed - request_ring\n");
1578
1579                         qla2x00_mem_free(ha);
1580                         msleep(100);
1581
1582                         continue;
1583                 }
1584
1585                 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1586                     (ha->response_q_length + 1) * sizeof(response_t),
1587                     &ha->response_dma, GFP_KERNEL);
1588                 if (ha->response_ring == NULL) {
1589                         qla_printk(KERN_WARNING, ha,
1590                             "Memory Allocation failed - response_ring\n");
1591
1592                         qla2x00_mem_free(ha);
1593                         msleep(100);
1594
1595                         continue;
1596                 }
1597
1598                 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1599                     &ha->gid_list_dma, GFP_KERNEL);
1600                 if (ha->gid_list == NULL) {
1601                         qla_printk(KERN_WARNING, ha,
1602                             "Memory Allocation failed - gid_list\n");
1603
1604                         qla2x00_mem_free(ha);
1605                         msleep(100);
1606
1607                         continue;
1608                 }
1609
1610                 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1611                     sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1612                 if (ha->rlc_rsp == NULL) {
1613                         qla_printk(KERN_WARNING, ha,
1614                                 "Memory Allocation failed - rlc");
1615
1616                         qla2x00_mem_free(ha);
1617                         msleep(100);
1618
1619                         continue;
1620                 }
1621
1622                 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1623                 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1624                     DMA_POOL_SIZE, 8, 0);
1625                 if (ha->s_dma_pool == NULL) {
1626                         qla_printk(KERN_WARNING, ha,
1627                             "Memory Allocation failed - s_dma_pool\n");
1628
1629                         qla2x00_mem_free(ha);
1630                         msleep(100);
1631
1632                         continue;
1633                 }
1634
1635                 /* get consistent memory allocated for init control block */
1636                 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1637                     &ha->init_cb_dma);
1638                 if (ha->init_cb == NULL) {
1639                         qla_printk(KERN_WARNING, ha,
1640                             "Memory Allocation failed - init_cb\n");
1641
1642                         qla2x00_mem_free(ha);
1643                         msleep(100);
1644
1645                         continue;
1646                 }
1647                 memset(ha->init_cb, 0, sizeof(init_cb_t));
1648
1649                 /* Get consistent memory allocated for Get Port Database cmd */
1650                 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1651                     &ha->iodesc_pd_dma);
1652                 if (ha->iodesc_pd == NULL) {
1653                         /* error */
1654                         qla_printk(KERN_WARNING, ha,
1655                             "Memory Allocation failed - iodesc_pd\n");
1656
1657                         qla2x00_mem_free(ha);
1658                         msleep(100);
1659
1660                         continue;
1661                 }
1662                 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1663
1664                 /* Allocate ioctl related memory. */
1665                 if (qla2x00_alloc_ioctl_mem(ha)) {
1666                         qla_printk(KERN_WARNING, ha,
1667                             "Memory Allocation failed - ioctl_mem\n");
1668
1669                         qla2x00_mem_free(ha);
1670                         msleep(100);
1671
1672                         continue;
1673                 }
1674
1675                 if (qla2x00_allocate_sp_pool(ha)) {
1676                         qla_printk(KERN_WARNING, ha,
1677                             "Memory Allocation failed - "
1678                             "qla2x00_allocate_sp_pool()\n");
1679
1680                         qla2x00_mem_free(ha);
1681                         msleep(100);
1682
1683                         continue;
1684                 }
1685
1686                 /* Allocate memory for SNS commands */
1687                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1688                         /* Get consistent memory allocated for SNS commands */
1689                         ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1690                             sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1691                             GFP_KERNEL);
1692                         if (ha->sns_cmd == NULL) {
1693                                 /* error */
1694                                 qla_printk(KERN_WARNING, ha,
1695                                     "Memory Allocation failed - sns_cmd\n");
1696
1697                                 qla2x00_mem_free(ha);
1698                                 msleep(100);
1699
1700                                 continue;
1701                         }
1702                         memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1703                 } else {
1704                         /* Get consistent memory allocated for MS IOCB */
1705                         ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1706                             &ha->ms_iocb_dma);
1707                         if (ha->ms_iocb == NULL) {
1708                                 /* error */
1709                                 qla_printk(KERN_WARNING, ha,
1710                                     "Memory Allocation failed - ms_iocb\n");
1711
1712                                 qla2x00_mem_free(ha);
1713                                 msleep(100);
1714
1715                                 continue;
1716                         }
1717                         memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1718
1719                         /*
1720                          * Get consistent memory allocated for CT SNS
1721                          * commands
1722                          */
1723                         ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1724                             sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1725                             GFP_KERNEL);
1726                         if (ha->ct_sns == NULL) {
1727                                 /* error */
1728                                 qla_printk(KERN_WARNING, ha,
1729                                     "Memory Allocation failed - ct_sns\n");
1730
1731                                 qla2x00_mem_free(ha);
1732                                 msleep(100);
1733
1734                                 continue;
1735                         }
1736                         memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1737                 }
1738
1739                 /* Done all allocations without any error. */
1740                 status = 0;
1741
1742         } while (retry-- && status != 0);
1743
1744         if (status) {
1745                 printk(KERN_WARNING
1746                         "%s(): **** FAILED ****\n", __func__);
1747         }
1748
1749         return(status);
1750 }
1751
1752 /*
1753 * qla2x00_mem_free
1754 *      Frees all adapter allocated memory.
1755 *
1756 * Input:
1757 *      ha = adapter block pointer.
1758 */
1759 static void
1760 qla2x00_mem_free(scsi_qla_host_t *ha)
1761 {
1762         struct list_head        *fcpl, *fcptemp;
1763         fc_port_t       *fcport;
1764         unsigned long   wtime;/* max wait time if mbx cmd is busy. */
1765
1766         if (ha == NULL) {
1767                 /* error */
1768                 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1769                 return;
1770         }
1771
1772         /* Make sure all other threads are stopped. */
1773         wtime = 60 * HZ;
1774         while (ha->dpc_wait && wtime) {
1775                 set_current_state(TASK_INTERRUPTIBLE);
1776                 wtime = schedule_timeout(wtime);
1777         }
1778
1779         /* free ioctl memory */
1780         qla2x00_free_ioctl_mem(ha);
1781
1782         /* free sp pool */
1783         qla2x00_free_sp_pool(ha);
1784
1785         if (ha->sns_cmd)
1786                 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1787                     ha->sns_cmd, ha->sns_cmd_dma);
1788
1789         if (ha->ct_sns)
1790                 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1791                     ha->ct_sns, ha->ct_sns_dma);
1792
1793         if (ha->ms_iocb)
1794                 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1795
1796         if (ha->iodesc_pd)
1797                 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1798
1799         if (ha->init_cb)
1800                 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1801
1802         if (ha->s_dma_pool)
1803                 dma_pool_destroy(ha->s_dma_pool);
1804
1805         if (ha->rlc_rsp)
1806                 dma_free_coherent(&ha->pdev->dev,
1807                     sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1808                     ha->rlc_rsp_dma);
1809
1810         if (ha->gid_list)
1811                 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1812                     ha->gid_list_dma);
1813
1814         if (ha->response_ring)
1815                 dma_free_coherent(&ha->pdev->dev,
1816                     (ha->response_q_length + 1) * sizeof(response_t),
1817                     ha->response_ring, ha->response_dma);
1818
1819         if (ha->request_ring)
1820                 dma_free_coherent(&ha->pdev->dev,
1821                     (ha->request_q_length + 1) * sizeof(request_t),
1822                     ha->request_ring, ha->request_dma);
1823
1824         ha->sns_cmd = NULL;
1825         ha->sns_cmd_dma = 0;
1826         ha->ct_sns = NULL;
1827         ha->ct_sns_dma = 0;
1828         ha->ms_iocb = NULL;
1829         ha->ms_iocb_dma = 0;
1830         ha->iodesc_pd = NULL;
1831         ha->iodesc_pd_dma = 0;
1832         ha->init_cb = NULL;
1833         ha->init_cb_dma = 0;
1834
1835         ha->s_dma_pool = NULL;
1836
1837         ha->rlc_rsp = NULL;
1838         ha->rlc_rsp_dma = 0;
1839         ha->gid_list = NULL;
1840         ha->gid_list_dma = 0;
1841
1842         ha->response_ring = NULL;
1843         ha->response_dma = 0;
1844         ha->request_ring = NULL;
1845         ha->request_dma = 0;
1846
1847         list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1848                 fcport = list_entry(fcpl, fc_port_t, list);
1849
1850                 /* fc ports */
1851                 list_del_init(&fcport->list);
1852                 kfree(fcport);
1853         }
1854         INIT_LIST_HEAD(&ha->fcports);
1855
1856         if (ha->fw_dump)
1857                 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1858
1859         if (ha->fw_dump_buffer)
1860                 vfree(ha->fw_dump_buffer);
1861
1862         ha->fw_dump = NULL;
1863         ha->fw_dump_reading = 0;
1864         ha->fw_dump_buffer = NULL;
1865 }
1866
1867 /*
1868  * qla2x00_allocate_sp_pool
1869  *       This routine is called during initialization to allocate
1870  *       memory for local srb_t.
1871  *
1872  * Input:
1873  *       ha   = adapter block pointer.
1874  *
1875  * Context:
1876  *      Kernel context.
1877  *
1878  * Note: Sets the ref_count for non Null sp to one.
1879  */
1880 static int
1881 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1882 {
1883         int      rval;
1884
1885         rval = QLA_SUCCESS;
1886         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1887             mempool_free_slab, srb_cachep);
1888         if (ha->srb_mempool == NULL) {
1889                 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1890                 rval = QLA_FUNCTION_FAILED;
1891         }
1892         return (rval);
1893 }
1894
1895 /*
1896  *  This routine frees all adapter allocated memory.
1897  *
1898  */
1899 static void
1900 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1901 {
1902         if (ha->srb_mempool) {
1903                 mempool_destroy(ha->srb_mempool);
1904                 ha->srb_mempool = NULL;
1905         }
1906 }
1907
1908 /**************************************************************************
1909 * qla2x00_do_dpc
1910 *   This kernel thread is a task that is schedule by the interrupt handler
1911 *   to perform the background processing for interrupts.
1912 *
1913 * Notes:
1914 * This task always run in the context of a kernel thread.  It
1915 * is kick-off by the driver's detect code and starts up
1916 * up one per adapter. It immediately goes to sleep and waits for
1917 * some fibre event.  When either the interrupt handler or
1918 * the timer routine detects a event it will one of the task
1919 * bits then wake us up.
1920 **************************************************************************/
1921 static int
1922 qla2x00_do_dpc(void *data)
1923 {
1924         DECLARE_MUTEX_LOCKED(sem);
1925         scsi_qla_host_t *ha;
1926         fc_port_t       *fcport;
1927         uint8_t         status;
1928         uint16_t        next_loopid;
1929
1930         ha = (scsi_qla_host_t *)data;
1931
1932         lock_kernel();
1933
1934         daemonize("%s_dpc", ha->host_str);
1935         allow_signal(SIGHUP);
1936
1937         ha->dpc_wait = &sem;
1938
1939         set_user_nice(current, -20);
1940
1941         unlock_kernel();
1942
1943         complete(&ha->dpc_inited);
1944
1945         while (1) {
1946                 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1947
1948                 if (down_interruptible(&sem))
1949                         break;
1950
1951                 if (ha->dpc_should_die)
1952                         break;
1953
1954                 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1955
1956                 /* Initialization not yet finished. Don't do anything yet. */
1957                 if (!ha->flags.init_done || ha->dpc_active)
1958                         continue;
1959
1960                 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1961
1962                 ha->dpc_active = 1;
1963
1964                 if (ha->flags.mbox_busy) {
1965                         ha->dpc_active = 0;
1966                         continue;
1967                 }
1968
1969                 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1970
1971                         DEBUG(printk("scsi(%ld): dpc: sched "
1972                             "qla2x00_abort_isp ha = %p\n",
1973                             ha->host_no, ha));
1974                         if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1975                             &ha->dpc_flags))) {
1976
1977                                 if (qla2x00_abort_isp(ha)) {
1978                                         /* failed. retry later */
1979                                         set_bit(ISP_ABORT_NEEDED,
1980                                             &ha->dpc_flags);
1981                                 }
1982                                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1983                         }
1984                         DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1985                             ha->host_no));
1986                 }
1987
1988                 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1989                     (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1990
1991                         DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1992                             ha->host_no));
1993
1994                         qla2x00_rst_aen(ha);
1995                         clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1996                 }
1997
1998                 /* Retry each device up to login retry count */
1999                 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2000                     !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
2001                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
2002
2003                         DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
2004                             ha->host_no));
2005
2006                         next_loopid = 0;
2007                         list_for_each_entry(fcport, &ha->fcports, list) {
2008                                 if (fcport->port_type != FCT_TARGET)
2009                                         continue;
2010
2011                                 /*
2012                                  * If the port is not ONLINE then try to login
2013                                  * to it if we haven't run out of retries.
2014                                  */
2015                                 if (atomic_read(&fcport->state) != FCS_ONLINE &&
2016                                     fcport->login_retry) {
2017
2018                                         fcport->login_retry--;
2019                                         if (fcport->flags & FCF_FABRIC_DEVICE) {
2020                                                 if (fcport->flags &
2021                                                     FCF_TAPE_PRESENT)
2022                                                         qla2x00_fabric_logout(
2023                                                             ha,
2024                                                             fcport->loop_id);
2025                                                 status = qla2x00_fabric_login(
2026                                                     ha, fcport, &next_loopid);
2027                                         } else
2028                                                 status =
2029                                                     qla2x00_local_device_login(
2030                                                         ha, fcport->loop_id);
2031
2032                                         if (status == QLA_SUCCESS) {
2033                                                 fcport->old_loop_id = fcport->loop_id;
2034
2035                                                 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
2036                                                     ha->host_no, fcport->loop_id));
2037
2038                                                 fcport->port_login_retry_count =
2039                                                     ha->port_down_retry_count * PORT_RETRY_TIME;
2040                                                 atomic_set(&fcport->state, FCS_ONLINE);
2041                                                 atomic_set(&fcport->port_down_timer,
2042                                                     ha->port_down_retry_count * PORT_RETRY_TIME);
2043
2044                                                 fcport->login_retry = 0;
2045                                         } else if (status == 1) {
2046                                                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
2047                                                 /* retry the login again */
2048                                                 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
2049                                                     ha->host_no,
2050                                                     fcport->login_retry, fcport->loop_id));
2051                                         } else {
2052                                                 fcport->login_retry = 0;
2053                                         }
2054                                 }
2055                                 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
2056                                         break;
2057                         }
2058                         DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
2059                             ha->host_no));
2060                 }
2061
2062                 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
2063                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
2064
2065                         clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
2066                         DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
2067                             ha->host_no));
2068
2069                         set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2070
2071                         DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2072                             ha->host_no));
2073                 }
2074
2075                 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2076
2077                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2078                             ha->host_no));
2079
2080                         if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2081                             &ha->dpc_flags))) {
2082
2083                                 qla2x00_loop_resync(ha);
2084
2085                                 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2086                         }
2087
2088                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2089                             ha->host_no));
2090                 }
2091
2092                 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2093
2094                         DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2095                             ha->host_no));
2096
2097                         qla2x00_rescan_fcports(ha);
2098
2099                         DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2100                             "end.\n",
2101                             ha->host_no));
2102                 }
2103
2104                 if (!ha->interrupts_on)
2105                         qla2x00_enable_intrs(ha);
2106
2107                 ha->dpc_active = 0;
2108         } /* End of while(1) */
2109
2110         DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2111
2112         /*
2113          * Make sure that nobody tries to wake us up again.
2114          */
2115         ha->dpc_wait = NULL;
2116         ha->dpc_active = 0;
2117
2118         complete_and_exit(&ha->dpc_exited, 0);
2119 }
2120
2121 /*
2122 *  qla2x00_rst_aen
2123 *      Processes asynchronous reset.
2124 *
2125 * Input:
2126 *      ha  = adapter block pointer.
2127 */
2128 static void
2129 qla2x00_rst_aen(scsi_qla_host_t *ha)
2130 {
2131         if (ha->flags.online && !ha->flags.reset_active &&
2132             !atomic_read(&ha->loop_down_timer) &&
2133             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2134                 do {
2135                         clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2136
2137                         /*
2138                          * Issue marker command only when we are going to start
2139                          * the I/O.
2140                          */
2141                         ha->marker_needed = 1;
2142                 } while (!atomic_read(&ha->loop_down_timer) &&
2143                     (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2144         }
2145 }
2146
2147
2148 /*
2149  * This routine will allocate SP from the free queue
2150  * input:
2151  *        scsi_qla_host_t *
2152  * output:
2153  *        srb_t * or NULL
2154  */
2155 static srb_t *
2156 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2157 {
2158         srb_t *sp;
2159
2160         sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2161         if (sp)
2162                 atomic_set(&sp->ref_count, 1);
2163         return (sp);
2164 }
2165
2166 static void
2167 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2168 {
2169         struct scsi_cmnd *cmd = sp->cmd;
2170
2171         if (sp->flags & SRB_DMA_VALID) {
2172                 if (cmd->use_sg) {
2173                         dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2174                             cmd->use_sg, cmd->sc_data_direction);
2175                 } else if (cmd->request_bufflen) {
2176                         dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2177                             cmd->request_bufflen, cmd->sc_data_direction);
2178                 }
2179                 sp->flags &= ~SRB_DMA_VALID;
2180         }
2181 }
2182
2183 void
2184 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2185 {
2186         struct scsi_cmnd *cmd = sp->cmd;
2187
2188         qla2x00_sp_free_dma(ha, sp);
2189
2190         CMD_SP(cmd) = NULL;
2191         mempool_free(sp, ha->srb_mempool);
2192
2193         cmd->scsi_done(cmd);
2194 }
2195
2196 /**************************************************************************
2197 *   qla2x00_timer
2198 *
2199 * Description:
2200 *   One second timer
2201 *
2202 * Context: Interrupt
2203 ***************************************************************************/
2204 static void
2205 qla2x00_timer(scsi_qla_host_t *ha)
2206 {
2207         unsigned long   cpu_flags = 0;
2208         fc_port_t       *fcport;
2209         int             start_dpc = 0;
2210         int             index;
2211         srb_t           *sp;
2212         int             t;
2213
2214         /*
2215          * Ports - Port down timer.
2216          *
2217          * Whenever, a port is in the LOST state we start decrementing its port
2218          * down timer every second until it reaches zero. Once  it reaches zero
2219          * the port it marked DEAD.
2220          */
2221         t = 0;
2222         list_for_each_entry(fcport, &ha->fcports, list) {
2223                 if (fcport->port_type != FCT_TARGET)
2224                         continue;
2225
2226                 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2227
2228                         if (atomic_read(&fcport->port_down_timer) == 0)
2229                                 continue;
2230
2231                         if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2232                                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2233
2234                         DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2235                             "%d remainning\n",
2236                             ha->host_no,
2237                             t, atomic_read(&fcport->port_down_timer)));
2238                 }
2239                 t++;
2240         } /* End of for fcport  */
2241
2242
2243         /* Loop down handler. */
2244         if (atomic_read(&ha->loop_down_timer) > 0 &&
2245             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2246
2247                 if (atomic_read(&ha->loop_down_timer) ==
2248                     ha->loop_down_abort_time) {
2249
2250                         DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2251                             "queues before time expire\n",
2252                             ha->host_no));
2253
2254                         if (!IS_QLA2100(ha) && ha->link_down_timeout)
2255                                 atomic_set(&ha->loop_state, LOOP_DEAD);
2256
2257                         /* Schedule an ISP abort to return any tape commands. */
2258                         spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2259                         for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2260                             index++) {
2261                                 fc_port_t *sfcp;
2262
2263                                 sp = ha->outstanding_cmds[index];
2264                                 if (!sp)
2265                                         continue;
2266                                 sfcp = sp->fcport;
2267                                 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2268                                         continue;
2269
2270                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2271                                 break;
2272                         }
2273                         spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2274
2275                         set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2276                         start_dpc++;
2277                 }
2278
2279                 /* if the loop has been down for 4 minutes, reinit adapter */
2280                 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2281                         DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2282                             "restarting queues.\n",
2283                             ha->host_no));
2284
2285                         set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2286                         start_dpc++;
2287
2288                         if (!(ha->device_flags & DFLG_NO_CABLE)) {
2289                                 DEBUG(printk("scsi(%ld): Loop down - "
2290                                     "aborting ISP.\n",
2291                                     ha->host_no));
2292                                 qla_printk(KERN_WARNING, ha,
2293                                     "Loop down - aborting ISP.\n");
2294
2295                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2296                         }
2297                 }
2298                 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2299                     ha->host_no,
2300                     atomic_read(&ha->loop_down_timer)));
2301         }
2302
2303         /* Schedule the DPC routine if needed */
2304         if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2305             test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2306             start_dpc ||
2307             test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2308             test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2309             test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2310             ha->dpc_wait && !ha->dpc_active) {
2311
2312                 up(ha->dpc_wait);
2313         }
2314
2315         qla2x00_restart_timer(ha, WATCH_INTERVAL);
2316 }
2317
2318 /* XXX(hch): crude hack to emulate a down_timeout() */
2319 int
2320 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2321 {
2322         const unsigned int step = HZ/10;
2323
2324         do {
2325                 if (!down_trylock(sema))
2326                         return 0;
2327                 set_current_state(TASK_INTERRUPTIBLE);
2328                 if (schedule_timeout(step))
2329                         break;
2330         } while ((timeout -= step) > 0);
2331
2332         return -ETIMEDOUT;
2333 }
2334
2335 /**
2336  * qla2x00_module_init - Module initialization.
2337  **/
2338 static int __init
2339 qla2x00_module_init(void)
2340 {
2341         /* Allocate cache for SRBs. */
2342         sprintf(srb_cachep_name, "qla2xxx_srbs");
2343         srb_cachep = kmem_cache_create(srb_cachep_name, sizeof(srb_t), 0,
2344             SLAB_HWCACHE_ALIGN, NULL, NULL);
2345         if (srb_cachep == NULL) {
2346                 printk(KERN_ERR
2347                     "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2348                 return -ENOMEM;
2349         }
2350
2351         /* Derive version string. */
2352         strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2353 #if DEBUG_QLA2100
2354         strcat(qla2x00_version_str, "-debug");
2355 #endif
2356         qla2xxx_transport_template =
2357             fc_attach_transport(&qla2xxx_transport_functions);
2358         if (!qla2xxx_transport_template)
2359                 return -ENODEV;
2360
2361         printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2362         return 0;
2363 }
2364
2365 /**
2366  * qla2x00_module_exit - Module cleanup.
2367  **/
2368 static void __exit
2369 qla2x00_module_exit(void)
2370 {
2371         /* Free SRBs cache. */
2372         if (srb_cachep != NULL) {
2373                 if (kmem_cache_destroy(srb_cachep) != 0) {
2374                         printk(KERN_ERR
2375                             "qla2xxx: Unable to free SRB cache...Memory pools "
2376                             "still active?\n");
2377                 }
2378                 srb_cachep = NULL;
2379         }
2380
2381         fc_release_transport(qla2xxx_transport_template);
2382 }
2383
2384 module_init(qla2x00_module_init);
2385 module_exit(qla2x00_module_exit);
2386
2387 MODULE_AUTHOR("QLogic Corporation");
2388 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2389 MODULE_LICENSE("GPL");
2390 MODULE_VERSION(QLA2XXX_VERSION);