git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/qla4xxx/ql4_os.c

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2006 QLogic Corporation
   4  *
   5  * See LICENSE.qla4xxx for copyright and licensing details.
   6  */
   7 #include <linux/moduleparam.h>
   8
   9 #include <scsi/scsi_tcq.h>
  10 #include <scsi/scsicam.h>
  11
  12 #include "ql4_def.h"
  13 #include "ql4_version.h"
  14 #include "ql4_glbl.h"
  15 #include "ql4_dbg.h"
  16 #include "ql4_inline.h"
  17
  18 /*
  19  * Driver version
  20  */
  21 static char qla4xxx_version_str[40];
  22
  23 /*
  24  * SRB allocation cache
  25  */
  26 static struct kmem_cache *srb_cachep;
  27
  28 /*
  29  * Module parameter information and variables
  30  */
  31 int ql4xdiscoverywait = 60;
  32 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
  33 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
  34 int ql4xdontresethba = 0;
  35 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
  36 MODULE_PARM_DESC(ql4xdontresethba,
  37                  "Dont reset the HBA when the driver gets 0x8002 AEN "
  38                  " default it will reset hba :0"
  39                  " set to 1 to avoid resetting HBA");
  40
  41 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
  42 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
  43 MODULE_PARM_DESC(ql4xextended_error_logging,
  44                  "Option to enable extended error logging, "
  45                  "Default is 0 - no logging, 1 - debug logging");
  46
  47 int ql4_mod_unload = 0;
  48
  49 /*
  50  * SCSI host template entry points
  51  */
  52 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
  53
  54 /*
  55  * iSCSI template entry points
  56  */
  57 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
  58                              enum iscsi_tgt_dscvr type, uint32_t enable,
  59                              struct sockaddr *dst_addr);
  60 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
  61                                   enum iscsi_param param, char *buf);
  62 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
  63                                   enum iscsi_param param, char *buf);
  64 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
  65                                   enum iscsi_host_param param, char *buf);
  66 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
  67
  68 /*
  69  * SCSI host template entry points
  70  */
  71 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
  72                                 void (*done) (struct scsi_cmnd *));
  73 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
  74 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
  75 static int qla4xxx_slave_alloc(struct scsi_device *device);
  76 static int qla4xxx_slave_configure(struct scsi_device *device);
  77 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
  78
  79 static struct scsi_host_template qla4xxx_driver_template = {
  80         .module                 = THIS_MODULE,
  81         .name                   = DRIVER_NAME,
  82         .proc_name              = DRIVER_NAME,
  83         .queuecommand           = qla4xxx_queuecommand,
  84
  85         .eh_device_reset_handler = qla4xxx_eh_device_reset,
  86         .eh_host_reset_handler  = qla4xxx_eh_host_reset,
  87
  88         .slave_configure        = qla4xxx_slave_configure,
  89         .slave_alloc            = qla4xxx_slave_alloc,
  90         .slave_destroy          = qla4xxx_slave_destroy,
  91
  92         .scan_finished          = iscsi_scan_finished,
  93
  94         .this_id                = -1,
  95         .cmd_per_lun            = 3,
  96         .use_clustering         = ENABLE_CLUSTERING,
  97         .sg_tablesize           = SG_ALL,
  98
  99         .max_sectors            = 0xFFFF,
 100 };
 101
 102 static struct iscsi_transport qla4xxx_iscsi_transport = {
 103         .owner                  = THIS_MODULE,
 104         .name                   = DRIVER_NAME,
 105         .caps                   = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
 106                                   CAP_DATA_PATH_OFFLOAD,
 107         .param_mask             = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
 108                                   ISCSI_TARGET_NAME | ISCSI_TPGT,
 109         .host_param_mask        = ISCSI_HOST_HWADDRESS |
 110                                   ISCSI_HOST_IPADDRESS |
 111                                   ISCSI_HOST_INITIATOR_NAME,
 112         .sessiondata_size       = sizeof(struct ddb_entry),
 113         .host_template          = &qla4xxx_driver_template,
 114
 115         .tgt_dscvr              = qla4xxx_tgt_dscvr,
 116         .get_conn_param         = qla4xxx_conn_get_param,
 117         .get_session_param      = qla4xxx_sess_get_param,
 118         .get_host_param         = qla4xxx_host_get_param,
 119         .session_recovery_timedout = qla4xxx_recovery_timedout,
 120 };
 121
 122 static struct scsi_transport_template *qla4xxx_scsi_transport;
 123
 124 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
 125 {
 126         struct ddb_entry *ddb_entry = session->dd_data;
 127         struct scsi_qla_host *ha = ddb_entry->ha;
 128
 129         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 130                 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 131
 132                 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count "
 133                               "of (%d) secs exhausted, marking device DEAD.\n",
 134                               ha->host_no, __func__, ddb_entry->fw_ddb_index,
 135                               ha->port_down_retry_count));
 136
 137                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc "
 138                               "flags = 0x%lx\n",
 139                               ha->host_no, __func__, ha->dpc_flags));
 140                 queue_work(ha->dpc_thread, &ha->dpc_work);
 141         }
 142 }
 143
 144 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
 145                                   enum iscsi_host_param param, char *buf)
 146 {
 147         struct scsi_qla_host *ha = to_qla_host(shost);
 148         int len;
 149
 150         switch (param) {
 151         case ISCSI_HOST_PARAM_HWADDRESS:
 152                 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
 153                 break;
 154         case ISCSI_HOST_PARAM_IPADDRESS:
 155                 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
 156                               ha->ip_address[1], ha->ip_address[2],
 157                               ha->ip_address[3]);
 158                 break;
 159         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 160                 len = sprintf(buf, "%s\n", ha->name_string);
 161                 break;
 162         default:
 163                 return -ENOSYS;
 164         }
 165
 166         return len;
 167 }
 168
 169 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
 170                                   enum iscsi_param param, char *buf)
 171 {
 172         struct ddb_entry *ddb_entry = sess->dd_data;
 173         int len;
 174
 175         switch (param) {
 176         case ISCSI_PARAM_TARGET_NAME:
 177                 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
 178                                ddb_entry->iscsi_name);
 179                 break;
 180         case ISCSI_PARAM_TPGT:
 181                 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
 182                 break;
 183         default:
 184                 return -ENOSYS;
 185         }
 186
 187         return len;
 188 }
 189
 190 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
 191                                   enum iscsi_param param, char *buf)
 192 {
 193         struct iscsi_cls_session *session;
 194         struct ddb_entry *ddb_entry;
 195         int len;
 196
 197         session = iscsi_dev_to_session(conn->dev.parent);
 198         ddb_entry = session->dd_data;
 199
 200         switch (param) {
 201         case ISCSI_PARAM_CONN_PORT:
 202                 len = sprintf(buf, "%hu\n", ddb_entry->port);
 203                 break;
 204         case ISCSI_PARAM_CONN_ADDRESS:
 205                 /* TODO: what are the ipv6 bits */
 206                 len = sprintf(buf, "%u.%u.%u.%u\n",
 207                               NIPQUAD(ddb_entry->ip_addr));
 208                 break;
 209         default:
 210                 return -ENOSYS;
 211         }
 212
 213         return len;
 214 }
 215
 216 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
 217                              enum iscsi_tgt_dscvr type, uint32_t enable,
 218                              struct sockaddr *dst_addr)
 219 {
 220         struct scsi_qla_host *ha;
 221         struct sockaddr_in *addr;
 222         struct sockaddr_in6 *addr6;
 223         int ret = 0;
 224
 225         ha = (struct scsi_qla_host *) shost->hostdata;
 226
 227         switch (type) {
 228         case ISCSI_TGT_DSCVR_SEND_TARGETS:
 229                 if (dst_addr->sa_family == AF_INET) {
 230                         addr = (struct sockaddr_in *)dst_addr;
 231                         if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
 232                                               addr->sin_port) != QLA_SUCCESS)
 233                                 ret = -EIO;
 234                 } else if (dst_addr->sa_family == AF_INET6) {
 235                         /*
 236                          * TODO: fix qla4xxx_send_tgts
 237                          */
 238                         addr6 = (struct sockaddr_in6 *)dst_addr;
 239                         if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
 240                                               addr6->sin6_port) != QLA_SUCCESS)
 241                                 ret = -EIO;
 242                 } else
 243                         ret = -ENOSYS;
 244                 break;
 245         default:
 246                 ret = -ENOSYS;
 247         }
 248         return ret;
 249 }
 250
 251 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
 252 {
 253         if (!ddb_entry->sess)
 254                 return;
 255
 256         if (ddb_entry->conn) {
 257                 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 258                 iscsi_remove_session(ddb_entry->sess);
 259         }
 260         iscsi_free_session(ddb_entry->sess);
 261 }
 262
 263 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
 264 {
 265         int err;
 266
 267         ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
 268         err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
 269         if (err) {
 270                 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
 271                 return err;
 272         }
 273
 274         ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
 275         if (!ddb_entry->conn) {
 276                 iscsi_remove_session(ddb_entry->sess);
 277                 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
 278                 return -ENOMEM;
 279         }
 280
 281         /* finally ready to go */
 282         iscsi_unblock_session(ddb_entry->sess);
 283         return 0;
 284 }
 285
 286 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
 287 {
 288         struct ddb_entry *ddb_entry;
 289         struct iscsi_cls_session *sess;
 290
 291         sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
 292         if (!sess)
 293                 return NULL;
 294
 295         ddb_entry = sess->dd_data;
 296         memset(ddb_entry, 0, sizeof(*ddb_entry));
 297         ddb_entry->ha = ha;
 298         ddb_entry->sess = sess;
 299         return ddb_entry;
 300 }
 301
 302 /*
 303  * Timer routines
 304  */
 305
 306 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
 307                                 unsigned long interval)
 308 {
 309         DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
 310                      __func__, ha->host->host_no));
 311         init_timer(&ha->timer);
 312         ha->timer.expires = jiffies + interval * HZ;
 313         ha->timer.data = (unsigned long)ha;
 314         ha->timer.function = (void (*)(unsigned long))func;
 315         add_timer(&ha->timer);
 316         ha->timer_active = 1;
 317 }
 318
 319 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
 320 {
 321         del_timer_sync(&ha->timer);
 322         ha->timer_active = 0;
 323 }
 324
 325 /***
 326  * qla4xxx_mark_device_missing - mark a device as missing.
 327  * @ha: Pointer to host adapter structure.
 328  * @ddb_entry: Pointer to device database entry
 329  *
 330  * This routine marks a device missing and resets the relogin retry count.
 331  **/
 332 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
 333                                  struct ddb_entry *ddb_entry)
 334 {
 335         atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
 336         DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
 337                       ha->host_no, ddb_entry->bus, ddb_entry->target,
 338                       ddb_entry->fw_ddb_index));
 339         iscsi_block_session(ddb_entry->sess);
 340         iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
 341 }
 342
 343 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
 344                                        struct ddb_entry *ddb_entry,
 345                                        struct scsi_cmnd *cmd,
 346                                        void (*done)(struct scsi_cmnd *))
 347 {
 348         struct srb *srb;
 349
 350         srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
 351         if (!srb)
 352                 return srb;
 353
 354         atomic_set(&srb->ref_count, 1);
 355         srb->ha = ha;
 356         srb->ddb = ddb_entry;
 357         srb->cmd = cmd;
 358         srb->flags = 0;
 359         cmd->SCp.ptr = (void *)srb;
 360         cmd->scsi_done = done;
 361
 362         return srb;
 363 }
 364
 365 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
 366 {
 367         struct scsi_cmnd *cmd = srb->cmd;
 368
 369         if (srb->flags & SRB_DMA_VALID) {
 370                 scsi_dma_unmap(cmd);
 371                 srb->flags &= ~SRB_DMA_VALID;
 372         }
 373         cmd->SCp.ptr = NULL;
 374 }
 375
 376 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
 377 {
 378         struct scsi_cmnd *cmd = srb->cmd;
 379
 380         qla4xxx_srb_free_dma(ha, srb);
 381
 382         mempool_free(srb, ha->srb_mempool);
 383
 384         cmd->scsi_done(cmd);
 385 }
 386
 387 /**
 388  * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
 389  * @cmd: Pointer to Linux's SCSI command structure
 390  * @done_fn: Function that the driver calls to notify the SCSI mid-layer
 391  *      that the command has been processed.
 392  *
 393  * Remarks:
 394  * This routine is invoked by Linux to send a SCSI command to the driver.
 395  * The mid-level driver tries to ensure that queuecommand never gets
 396  * invoked concurrently with itself or the interrupt handler (although
 397  * the interrupt handler may call this routine as part of request-
 398  * completion handling).   Unfortunely, it sometimes calls the scheduler
 399  * in interrupt context which is a big NO! NO!.
 400  **/
 401 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
 402                                 void (*done)(struct scsi_cmnd *))
 403 {
 404         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
 405         struct ddb_entry *ddb_entry = cmd->device->hostdata;
 406         struct iscsi_cls_session *sess = ddb_entry->sess;
 407         struct srb *srb;
 408         int rval;
 409
 410         if (!sess) {
 411                 cmd->result = DID_IMM_RETRY << 16;
 412                 goto qc_fail_command;
 413         }
 414
 415         rval = iscsi_session_chkready(sess);
 416         if (rval) {
 417                 cmd->result = rval;
 418                 goto qc_fail_command;
 419         }
 420
 421         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 422                 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
 423                         cmd->result = DID_NO_CONNECT << 16;
 424                         goto qc_fail_command;
 425                 }
 426                 goto qc_host_busy;
 427         }
 428
 429         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
 430                 goto qc_host_busy;
 431
 432         spin_unlock_irq(ha->host->host_lock);
 433
 434         srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
 435         if (!srb)
 436                 goto qc_host_busy_lock;
 437
 438         rval = qla4xxx_send_command_to_isp(ha, srb);
 439         if (rval != QLA_SUCCESS)
 440                 goto qc_host_busy_free_sp;
 441
 442         spin_lock_irq(ha->host->host_lock);
 443         return 0;
 444
 445 qc_host_busy_free_sp:
 446         qla4xxx_srb_free_dma(ha, srb);
 447         mempool_free(srb, ha->srb_mempool);
 448
 449 qc_host_busy_lock:
 450         spin_lock_irq(ha->host->host_lock);
 451
 452 qc_host_busy:
 453         return SCSI_MLQUEUE_HOST_BUSY;
 454
 455 qc_fail_command:
 456         done(cmd);
 457
 458         return 0;
 459 }
 460
 461 /**
 462  * qla4xxx_mem_free - frees memory allocated to adapter
 463  * @ha: Pointer to host adapter structure.
 464  *
 465  * Frees memory previously allocated by qla4xxx_mem_alloc
 466  **/
 467 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
 468 {
 469         if (ha->queues)
 470                 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
 471                                   ha->queues_dma);
 472
 473         ha->queues_len = 0;
 474         ha->queues = NULL;
 475         ha->queues_dma = 0;
 476         ha->request_ring = NULL;
 477         ha->request_dma = 0;
 478         ha->response_ring = NULL;
 479         ha->response_dma = 0;
 480         ha->shadow_regs = NULL;
 481         ha->shadow_regs_dma = 0;
 482
 483         /* Free srb pool. */
 484         if (ha->srb_mempool)
 485                 mempool_destroy(ha->srb_mempool);
 486
 487         ha->srb_mempool = NULL;
 488
 489         /* release io space registers  */
 490         if (ha->reg)
 491                 iounmap(ha->reg);
 492         pci_release_regions(ha->pdev);
 493 }
 494
 495 /**
 496  * qla4xxx_mem_alloc - allocates memory for use by adapter.
 497  * @ha: Pointer to host adapter structure
 498  *
 499  * Allocates DMA memory for request and response queues. Also allocates memory
 500  * for srbs.
 501  **/
 502 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 503 {
 504         unsigned long align;
 505
 506         /* Allocate contiguous block of DMA memory for queues. */
 507         ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 508                           (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
 509                           sizeof(struct shadow_regs) +
 510                           MEM_ALIGN_VALUE +
 511                           (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 512         ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
 513                                         &ha->queues_dma, GFP_KERNEL);
 514         if (ha->queues == NULL) {
 515                 dev_warn(&ha->pdev->dev,
 516                         "Memory Allocation failed - queues.\n");
 517
 518                 goto mem_alloc_error_exit;
 519         }
 520         memset(ha->queues, 0, ha->queues_len);
 521
 522         /*
 523          * As per RISC alignment requirements -- the bus-address must be a
 524          * multiple of the request-ring size (in bytes).
 525          */
 526         align = 0;
 527         if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
 528                 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
 529                                            (MEM_ALIGN_VALUE - 1));
 530
 531         /* Update request and response queue pointers. */
 532         ha->request_dma = ha->queues_dma + align;
 533         ha->request_ring = (struct queue_entry *) (ha->queues + align);
 534         ha->response_dma = ha->queues_dma + align +
 535                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
 536         ha->response_ring = (struct queue_entry *) (ha->queues + align +
 537                                                     (REQUEST_QUEUE_DEPTH *
 538                                                      QUEUE_SIZE));
 539         ha->shadow_regs_dma = ha->queues_dma + align +
 540                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 541                 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
 542         ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
 543                                                   (REQUEST_QUEUE_DEPTH *
 544                                                    QUEUE_SIZE) +
 545                                                   (RESPONSE_QUEUE_DEPTH *
 546                                                    QUEUE_SIZE));
 547
 548         /* Allocate memory for srb pool. */
 549         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
 550                                          mempool_free_slab, srb_cachep);
 551         if (ha->srb_mempool == NULL) {
 552                 dev_warn(&ha->pdev->dev,
 553                         "Memory Allocation failed - SRB Pool.\n");
 554
 555                 goto mem_alloc_error_exit;
 556         }
 557
 558         return QLA_SUCCESS;
 559
 560 mem_alloc_error_exit:
 561         qla4xxx_mem_free(ha);
 562         return QLA_ERROR;
 563 }
 564
 565 /**
 566  * qla4xxx_timer - checks every second for work to do.
 567  * @ha: Pointer to host adapter structure.
 568  **/
 569 static void qla4xxx_timer(struct scsi_qla_host *ha)
 570 {
 571         struct ddb_entry *ddb_entry, *dtemp;
 572         int start_dpc = 0;
 573
 574         /* Search for relogin's to time-out and port down retry. */
 575         list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
 576                 /* Count down time between sending relogins */
 577                 if (adapter_up(ha) &&
 578                     !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
 579                     atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 580                         if (atomic_read(&ddb_entry->retry_relogin_timer) !=
 581                             INVALID_ENTRY) {
 582                                 if (atomic_read(&ddb_entry->retry_relogin_timer)
 583                                                 == 0) {
 584                                         atomic_set(&ddb_entry->
 585                                                 retry_relogin_timer,
 586                                                 INVALID_ENTRY);
 587                                         set_bit(DPC_RELOGIN_DEVICE,
 588                                                 &ha->dpc_flags);
 589                                         set_bit(DF_RELOGIN, &ddb_entry->flags);
 590                                         DEBUG2(printk("scsi%ld: %s: index [%d]"
 591                                                       " login device\n",
 592                                                       ha->host_no, __func__,
 593                                                       ddb_entry->fw_ddb_index));
 594                                 } else
 595                                         atomic_dec(&ddb_entry->
 596                                                         retry_relogin_timer);
 597                         }
 598                 }
 599
 600                 /* Wait for relogin to timeout */
 601                 if (atomic_read(&ddb_entry->relogin_timer) &&
 602                     (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
 603                         /*
 604                          * If the relogin times out and the device is
 605                          * still NOT ONLINE then try and relogin again.
 606                          */
 607                         if (atomic_read(&ddb_entry->state) !=
 608                             DDB_STATE_ONLINE &&
 609                             ddb_entry->fw_ddb_device_state ==
 610                             DDB_DS_SESSION_FAILED) {
 611                                 /* Reset retry relogin timer */
 612                                 atomic_inc(&ddb_entry->relogin_retry_count);
 613                                 DEBUG2(printk("scsi%ld: index[%d] relogin"
 614                                               " timed out-retrying"
 615                                               " relogin (%d)\n",
 616                                               ha->host_no,
 617                                               ddb_entry->fw_ddb_index,
 618                                               atomic_read(&ddb_entry->
 619                                                           relogin_retry_count))
 620                                         );
 621                                 start_dpc++;
 622                                 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
 623                                              "initate relogin after"
 624                                              " %d seconds\n",
 625                                              ha->host_no, ddb_entry->bus,
 626                                              ddb_entry->target,
 627                                              ddb_entry->fw_ddb_index,
 628                                              ddb_entry->default_time2wait + 4)
 629                                         );
 630
 631                                 atomic_set(&ddb_entry->retry_relogin_timer,
 632                                            ddb_entry->default_time2wait + 4);
 633                         }
 634                 }
 635         }
 636
 637         /* Check for heartbeat interval. */
 638         if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
 639             ha->heartbeat_interval != 0) {
 640                 ha->seconds_since_last_heartbeat++;
 641                 if (ha->seconds_since_last_heartbeat >
 642                     ha->heartbeat_interval + 2)
 643                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 644         }
 645
 646
 647         /* Wakeup the dpc routine for this adapter, if needed. */
 648         if ((start_dpc ||
 649              test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 650              test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
 651              test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
 652              test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
 653              test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 654              test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
 655              test_bit(DPC_AEN, &ha->dpc_flags)) &&
 656              ha->dpc_thread) {
 657                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
 658                               " - dpc flags = 0x%lx\n",
 659                               ha->host_no, __func__, ha->dpc_flags));
 660                 queue_work(ha->dpc_thread, &ha->dpc_work);
 661         }
 662
 663         /* Reschedule timer thread to call us back in one second */
 664         mod_timer(&ha->timer, jiffies + HZ);
 665
 666         DEBUG2(ha->seconds_since_last_intr++);
 667 }
 668
 669 /**
 670  * qla4xxx_cmd_wait - waits for all outstanding commands to complete
 671  * @ha: Pointer to host adapter structure.
 672  *
 673  * This routine stalls the driver until all outstanding commands are returned.
 674  * Caller must release the Hardware Lock prior to calling this routine.
 675  **/
 676 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
 677 {
 678         uint32_t index = 0;
 679         int stat = QLA_SUCCESS;
 680         unsigned long flags;
 681         struct scsi_cmnd *cmd;
 682         int wait_cnt = WAIT_CMD_TOV;    /*
 683                                          * Initialized for 30 seconds as we
 684                                          * expect all commands to retuned
 685                                          * ASAP.
 686                                          */
 687
 688         while (wait_cnt) {
 689                 spin_lock_irqsave(&ha->hardware_lock, flags);
 690                 /* Find a command that hasn't completed. */
 691                 for (index = 0; index < ha->host->can_queue; index++) {
 692                         cmd = scsi_host_find_tag(ha->host, index);
 693                         if (cmd != NULL)
 694                                 break;
 695                 }
 696                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 697
 698                 /* If No Commands are pending, wait is complete */
 699                 if (index == ha->host->can_queue) {
 700                         break;
 701                 }
 702
 703                 /* If we timed out on waiting for commands to come back
 704                  * return ERROR.
 705                  */
 706                 wait_cnt--;
 707                 if (wait_cnt == 0)
 708                         stat = QLA_ERROR;
 709                 else {
 710                         msleep(1000);
 711                 }
 712         }                       /* End of While (wait_cnt) */
 713
 714         return stat;
 715 }
 716
 717 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
 718 {
 719         uint32_t ctrl_status;
 720         unsigned long flags = 0;
 721
 722         DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
 723
 724         spin_lock_irqsave(&ha->hardware_lock, flags);
 725
 726         /*
 727          * If the SCSI Reset Interrupt bit is set, clear it.
 728          * Otherwise, the Soft Reset won't work.
 729          */
 730         ctrl_status = readw(&ha->reg->ctrl_status);
 731         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
 732                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 733
 734         /* Issue Soft Reset */
 735         writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
 736         readl(&ha->reg->ctrl_status);
 737
 738         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 739 }
 740
 741 /**
 742  * qla4xxx_soft_reset - performs soft reset.
 743  * @ha: Pointer to host adapter structure.
 744  **/
 745 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
 746 {
 747         uint32_t max_wait_time;
 748         unsigned long flags = 0;
 749         int status = QLA_ERROR;
 750         uint32_t ctrl_status;
 751
 752         qla4xxx_hw_reset(ha);
 753
 754         /* Wait until the Network Reset Intr bit is cleared */
 755         max_wait_time = RESET_INTR_TOV;
 756         do {
 757                 spin_lock_irqsave(&ha->hardware_lock, flags);
 758                 ctrl_status = readw(&ha->reg->ctrl_status);
 759                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 760
 761                 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
 762                         break;
 763
 764                 msleep(1000);
 765         } while ((--max_wait_time));
 766
 767         if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
 768                 DEBUG2(printk(KERN_WARNING
 769                               "scsi%ld: Network Reset Intr not cleared by "
 770                               "Network function, clearing it now!\n",
 771                               ha->host_no));
 772                 spin_lock_irqsave(&ha->hardware_lock, flags);
 773                 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
 774                 readl(&ha->reg->ctrl_status);
 775                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 776         }
 777
 778         /* Wait until the firmware tells us the Soft Reset is done */
 779         max_wait_time = SOFT_RESET_TOV;
 780         do {
 781                 spin_lock_irqsave(&ha->hardware_lock, flags);
 782                 ctrl_status = readw(&ha->reg->ctrl_status);
 783                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 784
 785                 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
 786                         status = QLA_SUCCESS;
 787                         break;
 788                 }
 789
 790                 msleep(1000);
 791         } while ((--max_wait_time));
 792
 793         /*
 794          * Also, make sure that the SCSI Reset Interrupt bit has been cleared
 795          * after the soft reset has taken place.
 796          */
 797         spin_lock_irqsave(&ha->hardware_lock, flags);
 798         ctrl_status = readw(&ha->reg->ctrl_status);
 799         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
 800                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 801                 readl(&ha->reg->ctrl_status);
 802         }
 803         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 804
 805         /* If soft reset fails then most probably the bios on other
 806          * function is also enabled.
 807          * Since the initialization is sequential the other fn
 808          * wont be able to acknowledge the soft reset.
 809          * Issue a force soft reset to workaround this scenario.
 810          */
 811         if (max_wait_time == 0) {
 812                 /* Issue Force Soft Reset */
 813                 spin_lock_irqsave(&ha->hardware_lock, flags);
 814                 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
 815                 readl(&ha->reg->ctrl_status);
 816                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 817                 /* Wait until the firmware tells us the Soft Reset is done */
 818                 max_wait_time = SOFT_RESET_TOV;
 819                 do {
 820                         spin_lock_irqsave(&ha->hardware_lock, flags);
 821                         ctrl_status = readw(&ha->reg->ctrl_status);
 822                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 823
 824                         if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
 825                                 status = QLA_SUCCESS;
 826                                 break;
 827                         }
 828
 829                         msleep(1000);
 830                 } while ((--max_wait_time));
 831         }
 832
 833         return status;
 834 }
 835
 836 /**
 837  * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
 838  * @ha: Pointer to host adapter structure.
 839  *
 840  * This routine is called just prior to a HARD RESET to return all
 841  * outstanding commands back to the Operating System.
 842  * Caller should make sure that the following locks are released
 843  * before this calling routine: Hardware lock, and io_request_lock.
 844  **/
 845 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
 846 {
 847         struct srb *srb;
 848         int i;
 849         unsigned long flags;
 850
 851         spin_lock_irqsave(&ha->hardware_lock, flags);
 852         for (i = 0; i < ha->host->can_queue; i++) {
 853                 srb = qla4xxx_del_from_active_array(ha, i);
 854                 if (srb != NULL) {
 855                         srb->cmd->result = DID_RESET << 16;
 856                         qla4xxx_srb_compl(ha, srb);
 857                 }
 858         }
 859         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 860
 861 }
 862
 863 /**
 864  * qla4xxx_recover_adapter - recovers adapter after a fatal error
 865  * @ha: Pointer to host adapter structure.
 866  * @renew_ddb_list: Indicates what to do with the adapter's ddb list
 867  *      after adapter recovery has completed.
 868  *      0=preserve ddb list, 1=destroy and rebuild ddb list
 869  **/
 870 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
 871                                 uint8_t renew_ddb_list)
 872 {
 873         int status;
 874
 875         /* Stall incoming I/O until we are done */
 876         clear_bit(AF_ONLINE, &ha->flags);
 877         DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
 878                       __func__));
 879
 880         /* Wait for outstanding commands to complete.
 881          * Stalls the driver for max 30 secs
 882          */
 883         status = qla4xxx_cmd_wait(ha);
 884
 885         qla4xxx_disable_intrs(ha);
 886
 887         /* Flush any pending ddb changed AENs */
 888         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 889
 890         /* Reset the firmware.  If successful, function
 891          * returns with ISP interrupts enabled.
 892          */
 893         if (status == QLA_SUCCESS) {
 894                 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
 895                               ha->host_no, __func__));
 896                 qla4xxx_flush_active_srbs(ha);
 897                 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
 898                         status = qla4xxx_soft_reset(ha);
 899                 else
 900                         status = QLA_ERROR;
 901         }
 902
 903         /* Flush any pending ddb changed AENs */
 904         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 905
 906         /* Re-initialize firmware. If successful, function returns
 907          * with ISP interrupts enabled */
 908         if (status == QLA_SUCCESS) {
 909                 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
 910                               ha->host_no, __func__));
 911
 912                 /* If successful, AF_ONLINE flag set in
 913                  * qla4xxx_initialize_adapter */
 914                 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
 915         }
 916
 917         /* Failed adapter initialization?
 918          * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
 919         if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
 920             (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
 921                 /* Adapter initialization failed, see if we can retry
 922                  * resetting the ha */
 923                 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
 924                         ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
 925                         DEBUG2(printk("scsi%ld: recover adapter - retrying "
 926                                       "(%d) more times\n", ha->host_no,
 927                                       ha->retry_reset_ha_cnt));
 928                         set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 929                         status = QLA_ERROR;
 930                 } else {
 931                         if (ha->retry_reset_ha_cnt > 0) {
 932                                 /* Schedule another Reset HA--DPC will retry */
 933                                 ha->retry_reset_ha_cnt--;
 934                                 DEBUG2(printk("scsi%ld: recover adapter - "
 935                                               "retry remaining %d\n",
 936                                               ha->host_no,
 937                                               ha->retry_reset_ha_cnt));
 938                                 status = QLA_ERROR;
 939                         }
 940
 941                         if (ha->retry_reset_ha_cnt == 0) {
 942                                 /* Recover adapter retries have been exhausted.
 943                                  * Adapter DEAD */
 944                                 DEBUG2(printk("scsi%ld: recover adapter "
 945                                               "failed - board disabled\n",
 946                                               ha->host_no));
 947                                 qla4xxx_flush_active_srbs(ha);
 948                                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 949                                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 950                                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
 951                                           &ha->dpc_flags);
 952                                 status = QLA_ERROR;
 953                         }
 954                 }
 955         } else {
 956                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 957                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
 958                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 959         }
 960
 961         ha->adapter_error_count++;
 962
 963         if (status == QLA_SUCCESS)
 964                 qla4xxx_enable_intrs(ha);
 965
 966         DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
 967         return status;
 968 }
 969
 970 /**
 971  * qla4xxx_do_dpc - dpc routine
 972  * @data: in our case pointer to adapter structure
 973  *
 974  * This routine is a task that is schedule by the interrupt handler
 975  * to perform the background processing for interrupts.  We put it
 976  * on a task queue that is consumed whenever the scheduler runs; that's
 977  * so you can do anything (i.e. put the process to sleep etc).  In fact,
 978  * the mid-level tries to sleep when it reaches the driver threshold
 979  * "host->can_queue". This can cause a panic if we were in our interrupt code.
 980  **/
 981 static void qla4xxx_do_dpc(struct work_struct *work)
 982 {
 983         struct scsi_qla_host *ha =
 984                 container_of(work, struct scsi_qla_host, dpc_work);
 985         struct ddb_entry *ddb_entry, *dtemp;
 986         int status = QLA_ERROR;
 987
 988         DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
 989                 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
 990                 ha->host_no, __func__, ha->flags, ha->dpc_flags,
 991                 readw(&ha->reg->ctrl_status)));
 992
 993         /* Initialization not yet finished. Don't do anything yet. */
 994         if (!test_bit(AF_INIT_DONE, &ha->flags))
 995                 return;
 996
 997         if (adapter_up(ha) ||
 998             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 999             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1000             test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1001                 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1002                         test_bit(DPC_RESET_HA, &ha->dpc_flags))
1003                         qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1004
1005                 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1006                         uint8_t wait_time = RESET_INTR_TOV;
1007
1008                         while ((readw(&ha->reg->ctrl_status) &
1009                                 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1010                                 if (--wait_time == 0)
1011                                         break;
1012                                 msleep(1000);
1013                         }
1014                         if (wait_time == 0)
1015                                 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1016                                               "bit not cleared-- resetting\n",
1017                                               ha->host_no, __func__));
1018                         qla4xxx_flush_active_srbs(ha);
1019                         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1020                                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1021                                 status = qla4xxx_initialize_adapter(ha,
1022                                                 PRESERVE_DDB_LIST);
1023                         }
1024                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1025                         if (status == QLA_SUCCESS)
1026                                 qla4xxx_enable_intrs(ha);
1027                 }
1028         }
1029
1030         /* ---- process AEN? --- */
1031         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1032                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1033
1034         /* ---- Get DHCP IP Address? --- */
1035         if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1036                 qla4xxx_get_dhcp_ip_address(ha);
1037
1038         /* ---- relogin device? --- */
1039         if (adapter_up(ha) &&
1040             test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1041                 list_for_each_entry_safe(ddb_entry, dtemp,
1042                                          &ha->ddb_list, list) {
1043                         if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1044                             atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1045                                 qla4xxx_relogin_device(ha, ddb_entry);
1046
1047                         /*
1048                          * If mbx cmd times out there is no point
1049                          * in continuing further.
1050                          * With large no of targets this can hang
1051                          * the system.
1052                          */
1053                         if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1054                                 printk(KERN_WARNING "scsi%ld: %s: "
1055                                        "need to reset hba\n",
1056                                        ha->host_no, __func__);
1057                                 break;
1058                         }
1059                 }
1060         }
1061 }
1062
1063 /**
1064  * qla4xxx_free_adapter - release the adapter
1065  * @ha: pointer to adapter structure
1066  **/
1067 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1068 {
1069
1070         if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1071                 /* Turn-off interrupts on the card. */
1072                 qla4xxx_disable_intrs(ha);
1073         }
1074
1075         /* Kill the kernel thread for this host */
1076         if (ha->dpc_thread)
1077                 destroy_workqueue(ha->dpc_thread);
1078
1079         /* Issue Soft Reset to put firmware in unknown state */
1080         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1081                 qla4xxx_hw_reset(ha);
1082
1083         /* Remove timer thread, if present */
1084         if (ha->timer_active)
1085                 qla4xxx_stop_timer(ha);
1086
1087         /* Detach interrupts */
1088         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1089                 free_irq(ha->pdev->irq, ha);
1090
1091         /* free extra memory */
1092         qla4xxx_mem_free(ha);
1093
1094         pci_disable_device(ha->pdev);
1095
1096 }
1097
1098 /***
1099  * qla4xxx_iospace_config - maps registers
1100  * @ha: pointer to adapter structure
1101  *
1102  * This routines maps HBA's registers from the pci address space
1103  * into the kernel virtual address space for memory mapped i/o.
1104  **/
1105 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1106 {
1107         unsigned long pio, pio_len, pio_flags;
1108         unsigned long mmio, mmio_len, mmio_flags;
1109
1110         pio = pci_resource_start(ha->pdev, 0);
1111         pio_len = pci_resource_len(ha->pdev, 0);
1112         pio_flags = pci_resource_flags(ha->pdev, 0);
1113         if (pio_flags & IORESOURCE_IO) {
1114                 if (pio_len < MIN_IOBASE_LEN) {
1115                         dev_warn(&ha->pdev->dev,
1116                                 "Invalid PCI I/O region size\n");
1117                         pio = 0;
1118                 }
1119         } else {
1120                 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1121                 pio = 0;
1122         }
1123
1124         /* Use MMIO operations for all accesses. */
1125         mmio = pci_resource_start(ha->pdev, 1);
1126         mmio_len = pci_resource_len(ha->pdev, 1);
1127         mmio_flags = pci_resource_flags(ha->pdev, 1);
1128
1129         if (!(mmio_flags & IORESOURCE_MEM)) {
1130                 dev_err(&ha->pdev->dev,
1131                         "region #0 not an MMIO resource, aborting\n");
1132
1133                 goto iospace_error_exit;
1134         }
1135         if (mmio_len < MIN_IOBASE_LEN) {
1136                 dev_err(&ha->pdev->dev,
1137                         "Invalid PCI mem region size, aborting\n");
1138                 goto iospace_error_exit;
1139         }
1140
1141         if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1142                 dev_warn(&ha->pdev->dev,
1143                         "Failed to reserve PIO/MMIO regions\n");
1144
1145                 goto iospace_error_exit;
1146         }
1147
1148         ha->pio_address = pio;
1149         ha->pio_length = pio_len;
1150         ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1151         if (!ha->reg) {
1152                 dev_err(&ha->pdev->dev,
1153                         "cannot remap MMIO, aborting\n");
1154
1155                 goto iospace_error_exit;
1156         }
1157
1158         return 0;
1159
1160 iospace_error_exit:
1161         return -ENOMEM;
1162 }
1163
1164 /**
1165  * qla4xxx_probe_adapter - callback function to probe HBA
1166  * @pdev: pointer to pci_dev structure
1167  * @pci_device_id: pointer to pci_device entry
1168  *
1169  * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1170  * It returns zero if successful. It also initializes all data necessary for
1171  * the driver.
1172  **/
1173 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1174                                            const struct pci_device_id *ent)
1175 {
1176         int ret = -ENODEV, status;
1177         struct Scsi_Host *host;
1178         struct scsi_qla_host *ha;
1179         struct ddb_entry *ddb_entry, *ddbtemp;
1180         uint8_t init_retry_count = 0;
1181         char buf[34];
1182
1183         if (pci_enable_device(pdev))
1184                 return -1;
1185
1186         host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1187         if (host == NULL) {
1188                 printk(KERN_WARNING
1189                        "qla4xxx: Couldn't allocate host from scsi layer!\n");
1190                 goto probe_disable_device;
1191         }
1192
1193         /* Clear our data area */
1194         ha = (struct scsi_qla_host *) host->hostdata;
1195         memset(ha, 0, sizeof(*ha));
1196
1197         /* Save the information from PCI BIOS.  */
1198         ha->pdev = pdev;
1199         ha->host = host;
1200         ha->host_no = host->host_no;
1201
1202         /* Configure PCI I/O space. */
1203         ret = qla4xxx_iospace_config(ha);
1204         if (ret)
1205                 goto probe_failed;
1206
1207         dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1208                    pdev->device, pdev->irq, ha->reg);
1209
1210         qla4xxx_config_dma_addressing(ha);
1211
1212         /* Initialize lists and spinlocks. */
1213         INIT_LIST_HEAD(&ha->ddb_list);
1214         INIT_LIST_HEAD(&ha->free_srb_q);
1215
1216         mutex_init(&ha->mbox_sem);
1217
1218         spin_lock_init(&ha->hardware_lock);
1219
1220         /* Allocate dma buffers */
1221         if (qla4xxx_mem_alloc(ha)) {
1222                 dev_warn(&ha->pdev->dev,
1223                            "[ERROR] Failed to allocate memory for adapter\n");
1224
1225                 ret = -ENOMEM;
1226                 goto probe_failed;
1227         }
1228
1229         /*
1230          * Initialize the Host adapter request/response queues and
1231          * firmware
1232          * NOTE: interrupts enabled upon successful completion
1233          */
1234         status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1235         while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1236                 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1237                               "(%d)\n", __func__, init_retry_count));
1238                 qla4xxx_soft_reset(ha);
1239                 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1240         }
1241         if (status == QLA_ERROR) {
1242                 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1243
1244                 ret = -ENODEV;
1245                 goto probe_failed;
1246         }
1247
1248         host->cmd_per_lun = 3;
1249         host->max_channel = 0;
1250         host->max_lun = MAX_LUNS - 1;
1251         host->max_id = MAX_TARGETS;
1252         host->max_cmd_len = IOCB_MAX_CDB_LEN;
1253         host->can_queue = MAX_SRBS ;
1254         host->transportt = qla4xxx_scsi_transport;
1255
1256         ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1257         if (ret) {
1258                 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1259                 goto probe_failed;
1260         }
1261
1262         /* Startup the kernel thread for this host adapter. */
1263         DEBUG2(printk("scsi: %s: Starting kernel thread for "
1264                       "qla4xxx_dpc\n", __func__));
1265         sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1266         ha->dpc_thread = create_singlethread_workqueue(buf);
1267         if (!ha->dpc_thread) {
1268                 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1269                 ret = -ENODEV;
1270                 goto probe_failed;
1271         }
1272         INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1273
1274         ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1275                           IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1276         if (ret) {
1277                 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1278                         " already in use.\n", pdev->irq);
1279                 goto probe_failed;
1280         }
1281         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1282         host->irq = pdev->irq;
1283         DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1284
1285         qla4xxx_enable_intrs(ha);
1286
1287         /* Start timer thread. */
1288         qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1289
1290         set_bit(AF_INIT_DONE, &ha->flags);
1291
1292         pci_set_drvdata(pdev, ha);
1293
1294         ret = scsi_add_host(host, &pdev->dev);
1295         if (ret)
1296                 goto probe_failed;
1297
1298         /* Update transport device information for all devices. */
1299         list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1300                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1301                         if (qla4xxx_add_sess(ddb_entry))
1302                                 goto remove_host;
1303         }
1304
1305         printk(KERN_INFO
1306                " QLogic iSCSI HBA Driver version: %s\n"
1307                "  QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1308                qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1309                ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1310                ha->patch_number, ha->build_number);
1311         scsi_scan_host(host);
1312         return 0;
1313
1314 remove_host:
1315         qla4xxx_free_ddb_list(ha);
1316         scsi_remove_host(host);
1317
1318 probe_failed:
1319         qla4xxx_free_adapter(ha);
1320         scsi_host_put(ha->host);
1321
1322 probe_disable_device:
1323         pci_disable_device(pdev);
1324
1325         return ret;
1326 }
1327
1328 /**
1329  * qla4xxx_remove_adapter - calback function to remove adapter.
1330  * @pci_dev: PCI device pointer
1331  **/
1332 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1333 {
1334         struct scsi_qla_host *ha;
1335
1336         ha = pci_get_drvdata(pdev);
1337
1338         qla4xxx_disable_intrs(ha);
1339
1340         while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1341                 ssleep(1);
1342
1343         /* remove devs from iscsi_sessions to scsi_devices */
1344         qla4xxx_free_ddb_list(ha);
1345
1346         scsi_remove_host(ha->host);
1347
1348         qla4xxx_free_adapter(ha);
1349
1350         scsi_host_put(ha->host);
1351
1352         pci_set_drvdata(pdev, NULL);
1353 }
1354
1355 /**
1356  * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1357  * @ha: HA context
1358  *
1359  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1360  * supported addressing method.
1361  */
1362 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1363 {
1364         int retval;
1365
1366         /* Update our PCI device dma_mask for full 64 bit mask */
1367         if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1368                 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1369                         dev_dbg(&ha->pdev->dev,
1370                                   "Failed to set 64 bit PCI consistent mask; "
1371                                    "using 32 bit.\n");
1372                         retval = pci_set_consistent_dma_mask(ha->pdev,
1373                                                              DMA_32BIT_MASK);
1374                 }
1375         } else
1376                 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1377 }
1378
1379 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1380 {
1381         struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1382         struct ddb_entry *ddb = sess->dd_data;
1383
1384         sdev->hostdata = ddb;
1385         sdev->tagged_supported = 1;
1386         scsi_activate_tcq(sdev, sdev->host->can_queue);
1387         return 0;
1388 }
1389
1390 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1391 {
1392         sdev->tagged_supported = 1;
1393         return 0;
1394 }
1395
1396 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1397 {
1398         scsi_deactivate_tcq(sdev, 1);
1399 }
1400
1401 /**
1402  * qla4xxx_del_from_active_array - returns an active srb
1403  * @ha: Pointer to host adapter structure.
1404  * @index: index into to the active_array
1405  *
1406  * This routine removes and returns the srb at the specified index
1407  **/
1408 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1409 {
1410         struct srb *srb = NULL;
1411         struct scsi_cmnd *cmd;
1412
1413         if (!(cmd = scsi_host_find_tag(ha->host, index)))
1414                 return srb;
1415
1416         if (!(srb = (struct srb *)cmd->host_scribble))
1417                 return srb;
1418
1419         /* update counters */
1420         if (srb->flags & SRB_DMA_VALID) {
1421                 ha->req_q_count += srb->iocb_cnt;
1422                 ha->iocb_cnt -= srb->iocb_cnt;
1423                 if (srb->cmd)
1424                         srb->cmd->host_scribble = NULL;
1425         }
1426         return srb;
1427 }
1428
1429 /**
1430  * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1431  * @ha: actual ha whose done queue will contain the comd returned by firmware.
1432  * @cmd: Scsi Command to wait on.
1433  *
1434  * This routine waits for the command to be returned by the Firmware
1435  * for some max time.
1436  **/
1437 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1438                                       struct scsi_cmnd *cmd)
1439 {
1440         int done = 0;
1441         struct srb *rp;
1442         uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1443
1444         do {
1445                 /* Checking to see if its returned to OS */
1446                 rp = (struct srb *) cmd->SCp.ptr;
1447                 if (rp == NULL) {
1448                         done++;
1449                         break;
1450                 }
1451
1452                 msleep(2000);
1453         } while (max_wait_time--);
1454
1455         return done;
1456 }
1457
1458 /**
1459  * qla4xxx_wait_for_hba_online - waits for HBA to come online
1460  * @ha: Pointer to host adapter structure
1461  **/
1462 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1463 {
1464         unsigned long wait_online;
1465
1466         wait_online = jiffies + (30 * HZ);
1467         while (time_before(jiffies, wait_online)) {
1468
1469                 if (adapter_up(ha))
1470                         return QLA_SUCCESS;
1471                 else if (ha->retry_reset_ha_cnt == 0)
1472                         return QLA_ERROR;
1473
1474                 msleep(2000);
1475         }
1476
1477         return QLA_ERROR;
1478 }
1479
1480 /**
1481  * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1482  * @ha: pointer to to HBA
1483  * @t: target id
1484  * @l: lun id
1485  *
1486  * This function waits for all outstanding commands to a lun to complete. It
1487  * returns 0 if all pending commands are returned and 1 otherwise.
1488  **/
1489 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1490                                                  int t, int l)
1491 {
1492         int cnt;
1493         int status = 0;
1494         struct scsi_cmnd *cmd;
1495
1496         /*
1497          * Waiting for all commands for the designated target in the active
1498          * array
1499          */
1500         for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1501                 cmd = scsi_host_find_tag(ha->host, cnt);
1502                 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1503                         if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1504                                 status++;
1505                                 break;
1506                         }
1507                 }
1508         }
1509         return status;
1510 }
1511
1512 /**
1513  * qla4xxx_eh_device_reset - callback for target reset.
1514  * @cmd: Pointer to Linux's SCSI command structure
1515  *
1516  * This routine is called by the Linux OS to reset all luns on the
1517  * specified target.
1518  **/
1519 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1520 {
1521         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1522         struct ddb_entry *ddb_entry = cmd->device->hostdata;
1523         struct srb *sp;
1524         int ret = FAILED, stat;
1525
1526         sp = (struct srb *) cmd->SCp.ptr;
1527         if (!sp || !ddb_entry)
1528                 return ret;
1529
1530         dev_info(&ha->pdev->dev,
1531                    "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1532                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1533
1534         DEBUG2(printk(KERN_INFO
1535                       "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1536                       "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1537                       cmd, jiffies, cmd->timeout_per_command / HZ,
1538                       ha->dpc_flags, cmd->result, cmd->allowed));
1539
1540         /* FIXME: wait for hba to go online */
1541         stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1542         if (stat != QLA_SUCCESS) {
1543                 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1544                 goto eh_dev_reset_done;
1545         }
1546
1547         /* Send marker. */
1548         ha->marker_needed = 1;
1549
1550         /*
1551          * If we are coming down the EH path, wait for all commands to complete
1552          * for the device.
1553          */
1554         if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1555                 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1556                                                           cmd->device->id,
1557                                                           cmd->device->lun)){
1558                         dev_info(&ha->pdev->dev,
1559                                    "DEVICE RESET FAILED - waiting for "
1560                                    "commands.\n");
1561                         goto eh_dev_reset_done;
1562                 }
1563         }
1564
1565         dev_info(&ha->pdev->dev,
1566                    "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1567                    ha->host_no, cmd->device->channel, cmd->device->id,
1568                    cmd->device->lun);
1569
1570         ret = SUCCESS;
1571
1572 eh_dev_reset_done:
1573
1574         return ret;
1575 }
1576
1577 /**
1578  * qla4xxx_eh_host_reset - kernel callback
1579  * @cmd: Pointer to Linux's SCSI command structure
1580  *
1581  * This routine is invoked by the Linux kernel to perform fatal error
1582  * recovery on the specified adapter.
1583  **/
1584 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1585 {
1586         int return_status = FAILED;
1587         struct scsi_qla_host *ha;
1588
1589         ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1590
1591         dev_info(&ha->pdev->dev,
1592                    "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1593                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1594
1595         if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1596                 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host.  Adapter "
1597                               "DEAD.\n", ha->host_no, cmd->device->channel,
1598                               __func__));
1599
1600                 return FAILED;
1601         }
1602
1603         if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1604                 return_status = SUCCESS;
1605         }
1606
1607         dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1608                    return_status == FAILED ? "FAILED" : "SUCCEDED");
1609
1610         return return_status;
1611 }
1612
1613
1614 static struct pci_device_id qla4xxx_pci_tbl[] = {
1615         {
1616                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1617                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4010,
1618                 .subvendor      = PCI_ANY_ID,
1619                 .subdevice      = PCI_ANY_ID,
1620         },
1621         {
1622                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1623                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4022,
1624                 .subvendor      = PCI_ANY_ID,
1625                 .subdevice      = PCI_ANY_ID,
1626         },
1627         {
1628                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1629                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4032,
1630                 .subvendor      = PCI_ANY_ID,
1631                 .subdevice      = PCI_ANY_ID,
1632         },
1633         {0, 0},
1634 };
1635 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1636
1637 static struct pci_driver qla4xxx_pci_driver = {
1638         .name           = DRIVER_NAME,
1639         .id_table       = qla4xxx_pci_tbl,
1640         .probe          = qla4xxx_probe_adapter,
1641         .remove         = qla4xxx_remove_adapter,
1642 };
1643
1644 static int __init qla4xxx_module_init(void)
1645 {
1646         int ret;
1647
1648         /* Allocate cache for SRBs. */
1649         srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1650                                        SLAB_HWCACHE_ALIGN, NULL);
1651         if (srb_cachep == NULL) {
1652                 printk(KERN_ERR
1653                        "%s: Unable to allocate SRB cache..."
1654                        "Failing load!\n", DRIVER_NAME);
1655                 ret = -ENOMEM;
1656                 goto no_srp_cache;
1657         }
1658
1659         /* Derive version string. */
1660         strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1661         if (ql4xextended_error_logging)
1662                 strcat(qla4xxx_version_str, "-debug");
1663
1664         qla4xxx_scsi_transport =
1665                 iscsi_register_transport(&qla4xxx_iscsi_transport);
1666         if (!qla4xxx_scsi_transport){
1667                 ret = -ENODEV;
1668                 goto release_srb_cache;
1669         }
1670
1671         ret = pci_register_driver(&qla4xxx_pci_driver);
1672         if (ret)
1673                 goto unregister_transport;
1674
1675         printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1676         return 0;
1677
1678 unregister_transport:
1679         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1680 release_srb_cache:
1681         kmem_cache_destroy(srb_cachep);
1682 no_srp_cache:
1683         return ret;
1684 }
1685
1686 static void __exit qla4xxx_module_exit(void)
1687 {
1688         ql4_mod_unload = 1;
1689         pci_unregister_driver(&qla4xxx_pci_driver);
1690         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1691         kmem_cache_destroy(srb_cachep);
1692 }
1693
1694 module_init(qla4xxx_module_init);
1695 module_exit(qla4xxx_module_exit);
1696
1697 MODULE_AUTHOR("QLogic Corporation");
1698 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1699 MODULE_LICENSE("GPL");
1700 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);