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
  14 /*
  15  * Driver version
  16  */
  17 char qla4xxx_version_str[40];
  18
  19 /*
  20  * SRB allocation cache
  21  */
  22 static struct kmem_cache *srb_cachep;
  23
  24 /*
  25  * Module parameter information and variables
  26  */
  27 int ql4xdiscoverywait = 60;
  28 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
  29 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
  30 int ql4xdontresethba = 0;
  31 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
  32 MODULE_PARM_DESC(ql4xdontresethba,
  33                  "Dont reset the HBA when the driver gets 0x8002 AEN "
  34                  " default it will reset hba :0"
  35                  " set to 1 to avoid resetting HBA");
  36
  37 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
  38 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
  39 MODULE_PARM_DESC(ql4xextended_error_logging,
  40                  "Option to enable extended error logging, "
  41                  "Default is 0 - no logging, 1 - debug logging");
  42
  43 int ql4_mod_unload = 0;
  44
  45 /*
  46  * SCSI host template entry points
  47  */
  48
  49 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
  50
  51 /*
  52  * iSCSI template entry points
  53  */
  54 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
  55                              uint32_t enable, struct sockaddr *dst_addr);
  56 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
  57                                   enum iscsi_param param, char *buf);
  58 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
  59                                   enum iscsi_param param, char *buf);
  60 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
  61 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
  62 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
  63
  64 /*
  65  * SCSI host template entry points
  66  */
  67 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
  68                                 void (*done) (struct scsi_cmnd *));
  69 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
  70 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
  71 static int qla4xxx_slave_alloc(struct scsi_device *device);
  72 static int qla4xxx_slave_configure(struct scsi_device *device);
  73 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
  74
  75 static struct scsi_host_template qla4xxx_driver_template = {
  76         .module                 = THIS_MODULE,
  77         .name                   = DRIVER_NAME,
  78         .proc_name              = DRIVER_NAME,
  79         .queuecommand           = qla4xxx_queuecommand,
  80
  81         .eh_device_reset_handler = qla4xxx_eh_device_reset,
  82         .eh_host_reset_handler  = qla4xxx_eh_host_reset,
  83
  84         .slave_configure        = qla4xxx_slave_configure,
  85         .slave_alloc            = qla4xxx_slave_alloc,
  86         .slave_destroy          = qla4xxx_slave_destroy,
  87
  88         .this_id                = -1,
  89         .cmd_per_lun            = 3,
  90         .use_clustering         = ENABLE_CLUSTERING,
  91         .sg_tablesize           = SG_ALL,
  92
  93         .max_sectors            = 0xFFFF,
  94 };
  95
  96 static struct iscsi_transport qla4xxx_iscsi_transport = {
  97         .owner                  = THIS_MODULE,
  98         .name                   = DRIVER_NAME,
  99         .param_mask             = ISCSI_CONN_PORT |
 100                                   ISCSI_CONN_ADDRESS |
 101                                   ISCSI_TARGET_NAME |
 102                                   ISCSI_TPGT,
 103         .sessiondata_size       = sizeof(struct ddb_entry),
 104         .host_template          = &qla4xxx_driver_template,
 105
 106         .tgt_dscvr              = qla4xxx_tgt_dscvr,
 107         .get_conn_param         = qla4xxx_conn_get_param,
 108         .get_session_param      = qla4xxx_sess_get_param,
 109         .start_conn             = qla4xxx_conn_start,
 110         .stop_conn              = qla4xxx_conn_stop,
 111         .session_recovery_timedout = qla4xxx_recovery_timedout,
 112 };
 113
 114 static struct scsi_transport_template *qla4xxx_scsi_transport;
 115
 116 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
 117 {
 118         struct ddb_entry *ddb_entry = session->dd_data;
 119         struct scsi_qla_host *ha = ddb_entry->ha;
 120
 121         DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
 122                       "secs exhausted, marking device DEAD.\n", ha->host_no,
 123                       __func__, ddb_entry->fw_ddb_index,
 124                       ha->port_down_retry_count));
 125
 126         atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 127
 128         DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
 129                       "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
 130         queue_work(ha->dpc_thread, &ha->dpc_work);
 131 }
 132
 133 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
 134 {
 135         struct iscsi_cls_session *session;
 136         struct ddb_entry *ddb_entry;
 137
 138         session = iscsi_dev_to_session(conn->dev.parent);
 139         ddb_entry = session->dd_data;
 140
 141         DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
 142                       ddb_entry->ha->host_no, __func__,
 143                       ddb_entry->fw_ddb_index));
 144         iscsi_unblock_session(session);
 145         return 0;
 146 }
 147
 148 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
 149 {
 150         struct iscsi_cls_session *session;
 151         struct ddb_entry *ddb_entry;
 152
 153         session = iscsi_dev_to_session(conn->dev.parent);
 154         ddb_entry = session->dd_data;
 155
 156         DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
 157                       ddb_entry->ha->host_no, __func__,
 158                       ddb_entry->fw_ddb_index));
 159         if (flag == STOP_CONN_RECOVER)
 160                 iscsi_block_session(session);
 161         else
 162                 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
 163 }
 164
 165 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
 166                                   enum iscsi_param param, char *buf)
 167 {
 168         struct ddb_entry *ddb_entry = sess->dd_data;
 169         int len;
 170
 171         switch (param) {
 172         case ISCSI_PARAM_TARGET_NAME:
 173                 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
 174                                ddb_entry->iscsi_name);
 175                 break;
 176         case ISCSI_PARAM_TPGT:
 177                 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
 178                 break;
 179         default:
 180                 return -ENOSYS;
 181         }
 182
 183         return len;
 184 }
 185
 186 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
 187                                   enum iscsi_param param, char *buf)
 188 {
 189         struct iscsi_cls_session *session;
 190         struct ddb_entry *ddb_entry;
 191         int len;
 192
 193         session = iscsi_dev_to_session(conn->dev.parent);
 194         ddb_entry = session->dd_data;
 195
 196         switch (param) {
 197         case ISCSI_PARAM_CONN_PORT:
 198                 len = sprintf(buf, "%hu\n", ddb_entry->port);
 199                 break;
 200         case ISCSI_PARAM_CONN_ADDRESS:
 201                 /* TODO: what are the ipv6 bits */
 202                 len = sprintf(buf, "%u.%u.%u.%u\n",
 203                               NIPQUAD(ddb_entry->ip_addr));
 204                 break;
 205         default:
 206                 return -ENOSYS;
 207         }
 208
 209         return len;
 210 }
 211
 212 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
 213                              uint32_t enable, struct sockaddr *dst_addr)
 214 {
 215         struct scsi_qla_host *ha;
 216         struct Scsi_Host *shost;
 217         struct sockaddr_in *addr;
 218         struct sockaddr_in6 *addr6;
 219         int ret = 0;
 220
 221         shost = scsi_host_lookup(host_no);
 222         if (IS_ERR(shost)) {
 223                 printk(KERN_ERR "Could not find host no %u\n", host_no);
 224                 return -ENODEV;
 225         }
 226
 227         ha = (struct scsi_qla_host *) shost->hostdata;
 228
 229         switch (type) {
 230         case ISCSI_TGT_DSCVR_SEND_TARGETS:
 231                 if (dst_addr->sa_family == AF_INET) {
 232                         addr = (struct sockaddr_in *)dst_addr;
 233                         if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
 234                                               addr->sin_port) != QLA_SUCCESS)
 235                                 ret = -EIO;
 236                 } else if (dst_addr->sa_family == AF_INET6) {
 237                         /*
 238                          * TODO: fix qla4xxx_send_tgts
 239                          */
 240                         addr6 = (struct sockaddr_in6 *)dst_addr;
 241                         if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
 242                                               addr6->sin6_port) != QLA_SUCCESS)
 243                                 ret = -EIO;
 244                 } else
 245                         ret = -ENOSYS;
 246                 break;
 247         default:
 248                 ret = -ENOSYS;
 249         }
 250
 251         scsi_host_put(shost);
 252         return ret;
 253 }
 254
 255 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
 256 {
 257         if (!ddb_entry->sess)
 258                 return;
 259
 260         if (ddb_entry->conn) {
 261                 iscsi_if_destroy_session_done(ddb_entry->conn);
 262                 iscsi_destroy_conn(ddb_entry->conn);
 263                 iscsi_remove_session(ddb_entry->sess);
 264         }
 265         iscsi_free_session(ddb_entry->sess);
 266 }
 267
 268 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
 269 {
 270         int err;
 271
 272         err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
 273         if (err) {
 274                 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
 275                 return err;
 276         }
 277
 278         ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
 279         if (!ddb_entry->conn) {
 280                 iscsi_remove_session(ddb_entry->sess);
 281                 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
 282                 return -ENOMEM;
 283         }
 284
 285         ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
 286         iscsi_if_create_session_done(ddb_entry->conn);
 287         return 0;
 288 }
 289
 290 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
 291 {
 292         struct ddb_entry *ddb_entry;
 293         struct iscsi_cls_session *sess;
 294
 295         sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
 296         if (!sess)
 297                 return NULL;
 298
 299         ddb_entry = sess->dd_data;
 300         memset(ddb_entry, 0, sizeof(*ddb_entry));
 301         ddb_entry->ha = ha;
 302         ddb_entry->sess = sess;
 303         return ddb_entry;
 304 }
 305
 306 /*
 307  * Timer routines
 308  */
 309
 310 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
 311                                 unsigned long interval)
 312 {
 313         DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
 314                      __func__, ha->host->host_no));
 315         init_timer(&ha->timer);
 316         ha->timer.expires = jiffies + interval * HZ;
 317         ha->timer.data = (unsigned long)ha;
 318         ha->timer.function = (void (*)(unsigned long))func;
 319         add_timer(&ha->timer);
 320         ha->timer_active = 1;
 321 }
 322
 323 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
 324 {
 325         del_timer_sync(&ha->timer);
 326         ha->timer_active = 0;
 327 }
 328
 329 /***
 330  * qla4xxx_mark_device_missing - mark a device as missing.
 331  * @ha: Pointer to host adapter structure.
 332  * @ddb_entry: Pointer to device database entry
 333  *
 334  * This routine marks a device missing and resets the relogin retry count.
 335  **/
 336 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
 337                                  struct ddb_entry *ddb_entry)
 338 {
 339         atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
 340         DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
 341                       ha->host_no, ddb_entry->bus, ddb_entry->target,
 342                       ddb_entry->fw_ddb_index));
 343         iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
 344 }
 345
 346 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
 347                                        struct ddb_entry *ddb_entry,
 348                                        struct scsi_cmnd *cmd,
 349                                        void (*done)(struct scsi_cmnd *))
 350 {
 351         struct srb *srb;
 352
 353         srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
 354         if (!srb)
 355                 return srb;
 356
 357         atomic_set(&srb->ref_count, 1);
 358         srb->ha = ha;
 359         srb->ddb = ddb_entry;
 360         srb->cmd = cmd;
 361         srb->flags = 0;
 362         cmd->SCp.ptr = (void *)srb;
 363         cmd->scsi_done = done;
 364
 365         return srb;
 366 }
 367
 368 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
 369 {
 370         struct scsi_cmnd *cmd = srb->cmd;
 371
 372         if (srb->flags & SRB_DMA_VALID) {
 373                 if (cmd->use_sg) {
 374                         pci_unmap_sg(ha->pdev, cmd->request_buffer,
 375                                      cmd->use_sg, cmd->sc_data_direction);
 376                 } else if (cmd->request_bufflen) {
 377                         pci_unmap_single(ha->pdev, srb->dma_handle,
 378                                          cmd->request_bufflen,
 379                                          cmd->sc_data_direction);
 380                 }
 381                 srb->flags &= ~SRB_DMA_VALID;
 382         }
 383         cmd->SCp.ptr = NULL;
 384 }
 385
 386 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
 387 {
 388         struct scsi_cmnd *cmd = srb->cmd;
 389
 390         qla4xxx_srb_free_dma(ha, srb);
 391
 392         mempool_free(srb, ha->srb_mempool);
 393
 394         cmd->scsi_done(cmd);
 395 }
 396
 397 /**
 398  * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
 399  * @cmd: Pointer to Linux's SCSI command structure
 400  * @done_fn: Function that the driver calls to notify the SCSI mid-layer
 401  *      that the command has been processed.
 402  *
 403  * Remarks:
 404  * This routine is invoked by Linux to send a SCSI command to the driver.
 405  * The mid-level driver tries to ensure that queuecommand never gets
 406  * invoked concurrently with itself or the interrupt handler (although
 407  * the interrupt handler may call this routine as part of request-
 408  * completion handling).   Unfortunely, it sometimes calls the scheduler
 409  * in interrupt context which is a big NO! NO!.
 410  **/
 411 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
 412                                 void (*done)(struct scsi_cmnd *))
 413 {
 414         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
 415         struct ddb_entry *ddb_entry = cmd->device->hostdata;
 416         struct srb *srb;
 417         int rval;
 418
 419         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 420                 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
 421                         cmd->result = DID_NO_CONNECT << 16;
 422                         goto qc_fail_command;
 423                 }
 424                 goto qc_host_busy;
 425         }
 426
 427         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
 428                 goto qc_host_busy;
 429
 430         spin_unlock_irq(ha->host->host_lock);
 431
 432         srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
 433         if (!srb)
 434                 goto qc_host_busy_lock;
 435
 436         rval = qla4xxx_send_command_to_isp(ha, srb);
 437         if (rval != QLA_SUCCESS)
 438                 goto qc_host_busy_free_sp;
 439
 440         spin_lock_irq(ha->host->host_lock);
 441         return 0;
 442
 443 qc_host_busy_free_sp:
 444         qla4xxx_srb_free_dma(ha, srb);
 445         mempool_free(srb, ha->srb_mempool);
 446
 447 qc_host_busy_lock:
 448         spin_lock_irq(ha->host->host_lock);
 449
 450 qc_host_busy:
 451         return SCSI_MLQUEUE_HOST_BUSY;
 452
 453 qc_fail_command:
 454         done(cmd);
 455
 456         return 0;
 457 }
 458
 459 /**
 460  * qla4xxx_mem_free - frees memory allocated to adapter
 461  * @ha: Pointer to host adapter structure.
 462  *
 463  * Frees memory previously allocated by qla4xxx_mem_alloc
 464  **/
 465 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
 466 {
 467         if (ha->queues)
 468                 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
 469                                   ha->queues_dma);
 470
 471         ha->queues_len = 0;
 472         ha->queues = NULL;
 473         ha->queues_dma = 0;
 474         ha->request_ring = NULL;
 475         ha->request_dma = 0;
 476         ha->response_ring = NULL;
 477         ha->response_dma = 0;
 478         ha->shadow_regs = NULL;
 479         ha->shadow_regs_dma = 0;
 480
 481         /* Free srb pool. */
 482         if (ha->srb_mempool)
 483                 mempool_destroy(ha->srb_mempool);
 484
 485         ha->srb_mempool = NULL;
 486
 487         /* release io space registers  */
 488         if (ha->reg)
 489                 iounmap(ha->reg);
 490         pci_release_regions(ha->pdev);
 491 }
 492
 493 /**
 494  * qla4xxx_mem_alloc - allocates memory for use by adapter.
 495  * @ha: Pointer to host adapter structure
 496  *
 497  * Allocates DMA memory for request and response queues. Also allocates memory
 498  * for srbs.
 499  **/
 500 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 501 {
 502         unsigned long align;
 503
 504         /* Allocate contiguous block of DMA memory for queues. */
 505         ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 506                           (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
 507                           sizeof(struct shadow_regs) +
 508                           MEM_ALIGN_VALUE +
 509                           (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 510         ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
 511                                         &ha->queues_dma, GFP_KERNEL);
 512         if (ha->queues == NULL) {
 513                 dev_warn(&ha->pdev->dev,
 514                         "Memory Allocation failed - queues.\n");
 515
 516                 goto mem_alloc_error_exit;
 517         }
 518         memset(ha->queues, 0, ha->queues_len);
 519
 520         /*
 521          * As per RISC alignment requirements -- the bus-address must be a
 522          * multiple of the request-ring size (in bytes).
 523          */
 524         align = 0;
 525         if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
 526                 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
 527                                            (MEM_ALIGN_VALUE - 1));
 528
 529         /* Update request and response queue pointers. */
 530         ha->request_dma = ha->queues_dma + align;
 531         ha->request_ring = (struct queue_entry *) (ha->queues + align);
 532         ha->response_dma = ha->queues_dma + align +
 533                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
 534         ha->response_ring = (struct queue_entry *) (ha->queues + align +
 535                                                     (REQUEST_QUEUE_DEPTH *
 536                                                      QUEUE_SIZE));
 537         ha->shadow_regs_dma = ha->queues_dma + align +
 538                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 539                 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
 540         ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
 541                                                   (REQUEST_QUEUE_DEPTH *
 542                                                    QUEUE_SIZE) +
 543                                                   (RESPONSE_QUEUE_DEPTH *
 544                                                    QUEUE_SIZE));
 545
 546         /* Allocate memory for srb pool. */
 547         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
 548                                          mempool_free_slab, srb_cachep);
 549         if (ha->srb_mempool == NULL) {
 550                 dev_warn(&ha->pdev->dev,
 551                         "Memory Allocation failed - SRB Pool.\n");
 552
 553                 goto mem_alloc_error_exit;
 554         }
 555
 556         return QLA_SUCCESS;
 557
 558 mem_alloc_error_exit:
 559         qla4xxx_mem_free(ha);
 560         return QLA_ERROR;
 561 }
 562
 563 /**
 564  * qla4xxx_timer - checks every second for work to do.
 565  * @ha: Pointer to host adapter structure.
 566  **/
 567 static void qla4xxx_timer(struct scsi_qla_host *ha)
 568 {
 569         struct ddb_entry *ddb_entry, *dtemp;
 570         int start_dpc = 0;
 571
 572         /* Search for relogin's to time-out and port down retry. */
 573         list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
 574                 /* Count down time between sending relogins */
 575                 if (adapter_up(ha) &&
 576                     !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
 577                     atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 578                         if (atomic_read(&ddb_entry->retry_relogin_timer) !=
 579                             INVALID_ENTRY) {
 580                                 if (atomic_read(&ddb_entry->retry_relogin_timer)
 581                                                 == 0) {
 582                                         atomic_set(&ddb_entry->
 583                                                 retry_relogin_timer,
 584                                                 INVALID_ENTRY);
 585                                         set_bit(DPC_RELOGIN_DEVICE,
 586                                                 &ha->dpc_flags);
 587                                         set_bit(DF_RELOGIN, &ddb_entry->flags);
 588                                         DEBUG2(printk("scsi%ld: %s: index [%d]"
 589                                                       " login device\n",
 590                                                       ha->host_no, __func__,
 591                                                       ddb_entry->fw_ddb_index));
 592                                 } else
 593                                         atomic_dec(&ddb_entry->
 594                                                         retry_relogin_timer);
 595                         }
 596                 }
 597
 598                 /* Wait for relogin to timeout */
 599                 if (atomic_read(&ddb_entry->relogin_timer) &&
 600                     (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
 601                         /*
 602                          * If the relogin times out and the device is
 603                          * still NOT ONLINE then try and relogin again.
 604                          */
 605                         if (atomic_read(&ddb_entry->state) !=
 606                             DDB_STATE_ONLINE &&
 607                             ddb_entry->fw_ddb_device_state ==
 608                             DDB_DS_SESSION_FAILED) {
 609                                 /* Reset retry relogin timer */
 610                                 atomic_inc(&ddb_entry->relogin_retry_count);
 611                                 DEBUG2(printk("scsi%ld: index[%d] relogin"
 612                                               " timed out-retrying"
 613                                               " relogin (%d)\n",
 614                                               ha->host_no,
 615                                               ddb_entry->fw_ddb_index,
 616                                               atomic_read(&ddb_entry->
 617                                                           relogin_retry_count))
 618                                         );
 619                                 start_dpc++;
 620                                 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
 621                                              "initate relogin after"
 622                                              " %d seconds\n",
 623                                              ha->host_no, ddb_entry->bus,
 624                                              ddb_entry->target,
 625                                              ddb_entry->fw_ddb_index,
 626                                              ddb_entry->default_time2wait + 4)
 627                                         );
 628
 629                                 atomic_set(&ddb_entry->retry_relogin_timer,
 630                                            ddb_entry->default_time2wait + 4);
 631                         }
 632                 }
 633         }
 634
 635         /* Check for heartbeat interval. */
 636         if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
 637             ha->heartbeat_interval != 0) {
 638                 ha->seconds_since_last_heartbeat++;
 639                 if (ha->seconds_since_last_heartbeat >
 640                     ha->heartbeat_interval + 2)
 641                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 642         }
 643
 644
 645         /* Wakeup the dpc routine for this adapter, if needed. */
 646         if ((start_dpc ||
 647              test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 648              test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
 649              test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
 650              test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
 651              test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 652              test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
 653              test_bit(DPC_AEN, &ha->dpc_flags)) &&
 654              ha->dpc_thread) {
 655                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
 656                               " - dpc flags = 0x%lx\n",
 657                               ha->host_no, __func__, ha->dpc_flags));
 658                 queue_work(ha->dpc_thread, &ha->dpc_work);
 659         }
 660
 661         /* Reschedule timer thread to call us back in one second */
 662         mod_timer(&ha->timer, jiffies + HZ);
 663
 664         DEBUG2(ha->seconds_since_last_intr++);
 665 }
 666
 667 /**
 668  * qla4xxx_cmd_wait - waits for all outstanding commands to complete
 669  * @ha: Pointer to host adapter structure.
 670  *
 671  * This routine stalls the driver until all outstanding commands are returned.
 672  * Caller must release the Hardware Lock prior to calling this routine.
 673  **/
 674 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
 675 {
 676         uint32_t index = 0;
 677         int stat = QLA_SUCCESS;
 678         unsigned long flags;
 679         struct scsi_cmnd *cmd;
 680         int wait_cnt = WAIT_CMD_TOV;    /*
 681                                          * Initialized for 30 seconds as we
 682                                          * expect all commands to retuned
 683                                          * ASAP.
 684                                          */
 685
 686         while (wait_cnt) {
 687                 spin_lock_irqsave(&ha->hardware_lock, flags);
 688                 /* Find a command that hasn't completed. */
 689                 for (index = 0; index < ha->host->can_queue; index++) {
 690                         cmd = scsi_host_find_tag(ha->host, index);
 691                         if (cmd != NULL)
 692                                 break;
 693                 }
 694                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 695
 696                 /* If No Commands are pending, wait is complete */
 697                 if (index == ha->host->can_queue) {
 698                         break;
 699                 }
 700
 701                 /* If we timed out on waiting for commands to come back
 702                  * return ERROR.
 703                  */
 704                 wait_cnt--;
 705                 if (wait_cnt == 0)
 706                         stat = QLA_ERROR;
 707                 else {
 708                         msleep(1000);
 709                 }
 710         }                       /* End of While (wait_cnt) */
 711
 712         return stat;
 713 }
 714
 715 static void qla4xxx_hw_reset(struct scsi_qla_host *ha)
 716 {
 717         uint32_t ctrl_status;
 718         unsigned long flags = 0;
 719
 720         DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
 721
 722         spin_lock_irqsave(&ha->hardware_lock, flags);
 723
 724         /*
 725          * If the SCSI Reset Interrupt bit is set, clear it.
 726          * Otherwise, the Soft Reset won't work.
 727          */
 728         ctrl_status = readw(&ha->reg->ctrl_status);
 729         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
 730                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 731
 732         /* Issue Soft Reset */
 733         writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
 734         readl(&ha->reg->ctrl_status);
 735
 736         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 737 }
 738
 739 /**
 740  * qla4xxx_soft_reset - performs soft reset.
 741  * @ha: Pointer to host adapter structure.
 742  **/
 743 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
 744 {
 745         uint32_t max_wait_time;
 746         unsigned long flags = 0;
 747         int status = QLA_ERROR;
 748         uint32_t ctrl_status;
 749
 750         qla4xxx_hw_reset(ha);
 751
 752         /* Wait until the Network Reset Intr bit is cleared */
 753         max_wait_time = RESET_INTR_TOV;
 754         do {
 755                 spin_lock_irqsave(&ha->hardware_lock, flags);
 756                 ctrl_status = readw(&ha->reg->ctrl_status);
 757                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758
 759                 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
 760                         break;
 761
 762                 msleep(1000);
 763         } while ((--max_wait_time));
 764
 765         if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
 766                 DEBUG2(printk(KERN_WARNING
 767                               "scsi%ld: Network Reset Intr not cleared by "
 768                               "Network function, clearing it now!\n",
 769                               ha->host_no));
 770                 spin_lock_irqsave(&ha->hardware_lock, flags);
 771                 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
 772                 readl(&ha->reg->ctrl_status);
 773                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 774         }
 775
 776         /* Wait until the firmware tells us the Soft Reset is done */
 777         max_wait_time = SOFT_RESET_TOV;
 778         do {
 779                 spin_lock_irqsave(&ha->hardware_lock, flags);
 780                 ctrl_status = readw(&ha->reg->ctrl_status);
 781                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 782
 783                 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
 784                         status = QLA_SUCCESS;
 785                         break;
 786                 }
 787
 788                 msleep(1000);
 789         } while ((--max_wait_time));
 790
 791         /*
 792          * Also, make sure that the SCSI Reset Interrupt bit has been cleared
 793          * after the soft reset has taken place.
 794          */
 795         spin_lock_irqsave(&ha->hardware_lock, flags);
 796         ctrl_status = readw(&ha->reg->ctrl_status);
 797         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
 798                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 799                 readl(&ha->reg->ctrl_status);
 800         }
 801         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 802
 803         /* If soft reset fails then most probably the bios on other
 804          * function is also enabled.
 805          * Since the initialization is sequential the other fn
 806          * wont be able to acknowledge the soft reset.
 807          * Issue a force soft reset to workaround this scenario.
 808          */
 809         if (max_wait_time == 0) {
 810                 /* Issue Force Soft Reset */
 811                 spin_lock_irqsave(&ha->hardware_lock, flags);
 812                 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
 813                 readl(&ha->reg->ctrl_status);
 814                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 815                 /* Wait until the firmware tells us the Soft Reset is done */
 816                 max_wait_time = SOFT_RESET_TOV;
 817                 do {
 818                         spin_lock_irqsave(&ha->hardware_lock, flags);
 819                         ctrl_status = readw(&ha->reg->ctrl_status);
 820                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 821
 822                         if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
 823                                 status = QLA_SUCCESS;
 824                                 break;
 825                         }
 826
 827                         msleep(1000);
 828                 } while ((--max_wait_time));
 829         }
 830
 831         return status;
 832 }
 833
 834 /**
 835  * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
 836  * @ha: Pointer to host adapter structure.
 837  *
 838  * This routine is called just prior to a HARD RESET to return all
 839  * outstanding commands back to the Operating System.
 840  * Caller should make sure that the following locks are released
 841  * before this calling routine: Hardware lock, and io_request_lock.
 842  **/
 843 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
 844 {
 845         struct srb *srb;
 846         int i;
 847         unsigned long flags;
 848
 849         spin_lock_irqsave(&ha->hardware_lock, flags);
 850         for (i = 0; i < ha->host->can_queue; i++) {
 851                 srb = qla4xxx_del_from_active_array(ha, i);
 852                 if (srb != NULL) {
 853                         srb->cmd->result = DID_RESET << 16;
 854                         qla4xxx_srb_compl(ha, srb);
 855                 }
 856         }
 857         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 858
 859 }
 860
 861 /**
 862  * qla4xxx_recover_adapter - recovers adapter after a fatal error
 863  * @ha: Pointer to host adapter structure.
 864  * @renew_ddb_list: Indicates what to do with the adapter's ddb list
 865  *      after adapter recovery has completed.
 866  *      0=preserve ddb list, 1=destroy and rebuild ddb list
 867  **/
 868 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
 869                                 uint8_t renew_ddb_list)
 870 {
 871         int status;
 872
 873         /* Stall incoming I/O until we are done */
 874         clear_bit(AF_ONLINE, &ha->flags);
 875         DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
 876                       __func__));
 877
 878         /* Wait for outstanding commands to complete.
 879          * Stalls the driver for max 30 secs
 880          */
 881         status = qla4xxx_cmd_wait(ha);
 882
 883         qla4xxx_disable_intrs(ha);
 884
 885         /* Flush any pending ddb changed AENs */
 886         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 887
 888         /* Reset the firmware.  If successful, function
 889          * returns with ISP interrupts enabled.
 890          */
 891         if (status == QLA_SUCCESS) {
 892                 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
 893                               ha->host_no, __func__));
 894                 qla4xxx_flush_active_srbs(ha);
 895                 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
 896                         status = qla4xxx_soft_reset(ha);
 897                 else
 898                         status = QLA_ERROR;
 899         }
 900
 901         /* Flush any pending ddb changed AENs */
 902         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 903
 904         /* Re-initialize firmware. If successful, function returns
 905          * with ISP interrupts enabled */
 906         if (status == QLA_SUCCESS) {
 907                 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
 908                               ha->host_no, __func__));
 909
 910                 /* If successful, AF_ONLINE flag set in
 911                  * qla4xxx_initialize_adapter */
 912                 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
 913         }
 914
 915         /* Failed adapter initialization?
 916          * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
 917         if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
 918             (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
 919                 /* Adapter initialization failed, see if we can retry
 920                  * resetting the ha */
 921                 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
 922                         ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
 923                         DEBUG2(printk("scsi%ld: recover adapter - retrying "
 924                                       "(%d) more times\n", ha->host_no,
 925                                       ha->retry_reset_ha_cnt));
 926                         set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 927                         status = QLA_ERROR;
 928                 } else {
 929                         if (ha->retry_reset_ha_cnt > 0) {
 930                                 /* Schedule another Reset HA--DPC will retry */
 931                                 ha->retry_reset_ha_cnt--;
 932                                 DEBUG2(printk("scsi%ld: recover adapter - "
 933                                               "retry remaining %d\n",
 934                                               ha->host_no,
 935                                               ha->retry_reset_ha_cnt));
 936                                 status = QLA_ERROR;
 937                         }
 938
 939                         if (ha->retry_reset_ha_cnt == 0) {
 940                                 /* Recover adapter retries have been exhausted.
 941                                  * Adapter DEAD */
 942                                 DEBUG2(printk("scsi%ld: recover adapter "
 943                                               "failed - board disabled\n",
 944                                               ha->host_no));
 945                                 qla4xxx_flush_active_srbs(ha);
 946                                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 947                                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 948                                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
 949                                           &ha->dpc_flags);
 950                                 status = QLA_ERROR;
 951                         }
 952                 }
 953         } else {
 954                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 955                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
 956                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 957         }
 958
 959         ha->adapter_error_count++;
 960
 961         if (status == QLA_SUCCESS)
 962                 qla4xxx_enable_intrs(ha);
 963
 964         DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
 965         return status;
 966 }
 967
 968 /**
 969  * qla4xxx_do_dpc - dpc routine
 970  * @data: in our case pointer to adapter structure
 971  *
 972  * This routine is a task that is schedule by the interrupt handler
 973  * to perform the background processing for interrupts.  We put it
 974  * on a task queue that is consumed whenever the scheduler runs; that's
 975  * so you can do anything (i.e. put the process to sleep etc).  In fact,
 976  * the mid-level tries to sleep when it reaches the driver threshold
 977  * "host->can_queue". This can cause a panic if we were in our interrupt code.
 978  **/
 979 static void qla4xxx_do_dpc(struct work_struct *work)
 980 {
 981         struct scsi_qla_host *ha =
 982                 container_of(work, struct scsi_qla_host, dpc_work);
 983         struct ddb_entry *ddb_entry, *dtemp;
 984         int status = QLA_ERROR;
 985
 986         DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
 987                 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
 988                 ha->host_no, __func__, ha->flags, ha->dpc_flags,
 989                 readw(&ha->reg->ctrl_status)));
 990
 991         /* Initialization not yet finished. Don't do anything yet. */
 992         if (!test_bit(AF_INIT_DONE, &ha->flags))
 993                 return;
 994
 995         if (adapter_up(ha) ||
 996             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 997             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 998             test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
 999                 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1000                         test_bit(DPC_RESET_HA, &ha->dpc_flags))
1001                         qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1002
1003                 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1004                         uint8_t wait_time = RESET_INTR_TOV;
1005
1006                         while ((readw(&ha->reg->ctrl_status) &
1007                                 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1008                                 if (--wait_time == 0)
1009                                         break;
1010                                 msleep(1000);
1011                         }
1012                         if (wait_time == 0)
1013                                 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1014                                               "bit not cleared-- resetting\n",
1015                                               ha->host_no, __func__));
1016                         qla4xxx_flush_active_srbs(ha);
1017                         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1018                                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1019                                 status = qla4xxx_initialize_adapter(ha,
1020                                                 PRESERVE_DDB_LIST);
1021                         }
1022                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1023                         if (status == QLA_SUCCESS)
1024                                 qla4xxx_enable_intrs(ha);
1025                 }
1026         }
1027
1028         /* ---- process AEN? --- */
1029         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1030                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1031
1032         /* ---- Get DHCP IP Address? --- */
1033         if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1034                 qla4xxx_get_dhcp_ip_address(ha);
1035
1036         /* ---- relogin device? --- */
1037         if (adapter_up(ha) &&
1038             test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1039                 list_for_each_entry_safe(ddb_entry, dtemp,
1040                                          &ha->ddb_list, list) {
1041                         if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1042                             atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1043                                 qla4xxx_relogin_device(ha, ddb_entry);
1044
1045                         /*
1046                          * If mbx cmd times out there is no point
1047                          * in continuing further.
1048                          * With large no of targets this can hang
1049                          * the system.
1050                          */
1051                         if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1052                                 printk(KERN_WARNING "scsi%ld: %s: "
1053                                        "need to reset hba\n",
1054                                        ha->host_no, __func__);
1055                                 break;
1056                         }
1057                 }
1058         }
1059 }
1060
1061 /**
1062  * qla4xxx_free_adapter - release the adapter
1063  * @ha: pointer to adapter structure
1064  **/
1065 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1066 {
1067
1068         if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1069                 /* Turn-off interrupts on the card. */
1070                 qla4xxx_disable_intrs(ha);
1071         }
1072
1073         /* Kill the kernel thread for this host */
1074         if (ha->dpc_thread)
1075                 destroy_workqueue(ha->dpc_thread);
1076
1077         /* Issue Soft Reset to put firmware in unknown state */
1078         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1079                 qla4xxx_hw_reset(ha);
1080
1081         /* Remove timer thread, if present */
1082         if (ha->timer_active)
1083                 qla4xxx_stop_timer(ha);
1084
1085         /* free extra memory */
1086         qla4xxx_mem_free(ha);
1087
1088         /* Detach interrupts */
1089         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1090                 free_irq(ha->pdev->irq, ha);
1091
1092         pci_disable_device(ha->pdev);
1093
1094 }
1095
1096 /***
1097  * qla4xxx_iospace_config - maps registers
1098  * @ha: pointer to adapter structure
1099  *
1100  * This routines maps HBA's registers from the pci address space
1101  * into the kernel virtual address space for memory mapped i/o.
1102  **/
1103 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1104 {
1105         unsigned long pio, pio_len, pio_flags;
1106         unsigned long mmio, mmio_len, mmio_flags;
1107
1108         pio = pci_resource_start(ha->pdev, 0);
1109         pio_len = pci_resource_len(ha->pdev, 0);
1110         pio_flags = pci_resource_flags(ha->pdev, 0);
1111         if (pio_flags & IORESOURCE_IO) {
1112                 if (pio_len < MIN_IOBASE_LEN) {
1113                         dev_warn(&ha->pdev->dev,
1114                                 "Invalid PCI I/O region size\n");
1115                         pio = 0;
1116                 }
1117         } else {
1118                 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1119                 pio = 0;
1120         }
1121
1122         /* Use MMIO operations for all accesses. */
1123         mmio = pci_resource_start(ha->pdev, 1);
1124         mmio_len = pci_resource_len(ha->pdev, 1);
1125         mmio_flags = pci_resource_flags(ha->pdev, 1);
1126
1127         if (!(mmio_flags & IORESOURCE_MEM)) {
1128                 dev_err(&ha->pdev->dev,
1129                         "region #0 not an MMIO resource, aborting\n");
1130
1131                 goto iospace_error_exit;
1132         }
1133         if (mmio_len < MIN_IOBASE_LEN) {
1134                 dev_err(&ha->pdev->dev,
1135                         "Invalid PCI mem region size, aborting\n");
1136                 goto iospace_error_exit;
1137         }
1138
1139         if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1140                 dev_warn(&ha->pdev->dev,
1141                         "Failed to reserve PIO/MMIO regions\n");
1142
1143                 goto iospace_error_exit;
1144         }
1145
1146         ha->pio_address = pio;
1147         ha->pio_length = pio_len;
1148         ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1149         if (!ha->reg) {
1150                 dev_err(&ha->pdev->dev,
1151                         "cannot remap MMIO, aborting\n");
1152
1153                 goto iospace_error_exit;
1154         }
1155
1156         return 0;
1157
1158 iospace_error_exit:
1159         return -ENOMEM;
1160 }
1161
1162 /**
1163  * qla4xxx_probe_adapter - callback function to probe HBA
1164  * @pdev: pointer to pci_dev structure
1165  * @pci_device_id: pointer to pci_device entry
1166  *
1167  * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1168  * It returns zero if successful. It also initializes all data necessary for
1169  * the driver.
1170  **/
1171 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1172                                            const struct pci_device_id *ent)
1173 {
1174         int ret = -ENODEV, status;
1175         struct Scsi_Host *host;
1176         struct scsi_qla_host *ha;
1177         struct ddb_entry *ddb_entry, *ddbtemp;
1178         uint8_t init_retry_count = 0;
1179         char buf[34];
1180
1181         if (pci_enable_device(pdev))
1182                 return -1;
1183
1184         host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1185         if (host == NULL) {
1186                 printk(KERN_WARNING
1187                        "qla4xxx: Couldn't allocate host from scsi layer!\n");
1188                 goto probe_disable_device;
1189         }
1190
1191         /* Clear our data area */
1192         ha = (struct scsi_qla_host *) host->hostdata;
1193         memset(ha, 0, sizeof(*ha));
1194
1195         /* Save the information from PCI BIOS.  */
1196         ha->pdev = pdev;
1197         ha->host = host;
1198         ha->host_no = host->host_no;
1199
1200         /* Configure PCI I/O space. */
1201         ret = qla4xxx_iospace_config(ha);
1202         if (ret)
1203                 goto probe_failed;
1204
1205         dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1206                    pdev->device, pdev->irq, ha->reg);
1207
1208         qla4xxx_config_dma_addressing(ha);
1209
1210         /* Initialize lists and spinlocks. */
1211         INIT_LIST_HEAD(&ha->ddb_list);
1212         INIT_LIST_HEAD(&ha->free_srb_q);
1213
1214         mutex_init(&ha->mbox_sem);
1215
1216         spin_lock_init(&ha->hardware_lock);
1217
1218         /* Allocate dma buffers */
1219         if (qla4xxx_mem_alloc(ha)) {
1220                 dev_warn(&ha->pdev->dev,
1221                            "[ERROR] Failed to allocate memory for adapter\n");
1222
1223                 ret = -ENOMEM;
1224                 goto probe_failed;
1225         }
1226
1227         /*
1228          * Initialize the Host adapter request/response queues and
1229          * firmware
1230          * NOTE: interrupts enabled upon successful completion
1231          */
1232         status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1233         while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1234                 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1235                               "(%d)\n", __func__, init_retry_count));
1236                 qla4xxx_soft_reset(ha);
1237                 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1238         }
1239         if (status == QLA_ERROR) {
1240                 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1241
1242                 ret = -ENODEV;
1243                 goto probe_failed;
1244         }
1245
1246         host->cmd_per_lun = 3;
1247         host->max_channel = 0;
1248         host->max_lun = MAX_LUNS - 1;
1249         host->max_id = MAX_TARGETS;
1250         host->max_cmd_len = IOCB_MAX_CDB_LEN;
1251         host->can_queue = MAX_SRBS ;
1252         host->transportt = qla4xxx_scsi_transport;
1253
1254         ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1255         if (ret) {
1256                 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1257                 goto probe_failed;
1258         }
1259
1260         /* Startup the kernel thread for this host adapter. */
1261         DEBUG2(printk("scsi: %s: Starting kernel thread for "
1262                       "qla4xxx_dpc\n", __func__));
1263         sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1264         ha->dpc_thread = create_singlethread_workqueue(buf);
1265         if (!ha->dpc_thread) {
1266                 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1267                 ret = -ENODEV;
1268                 goto probe_failed;
1269         }
1270         INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1271
1272         ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1273                           IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1274         if (ret) {
1275                 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1276                         " already in use.\n", pdev->irq);
1277                 goto probe_failed;
1278         }
1279         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1280         host->irq = pdev->irq;
1281         DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1282
1283         qla4xxx_enable_intrs(ha);
1284
1285         /* Start timer thread. */
1286         qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1287
1288         set_bit(AF_INIT_DONE, &ha->flags);
1289
1290         pci_set_drvdata(pdev, ha);
1291
1292         ret = scsi_add_host(host, &pdev->dev);
1293         if (ret)
1294                 goto probe_failed;
1295
1296         /* Update transport device information for all devices. */
1297         list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1298                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1299                         if (qla4xxx_add_sess(ddb_entry))
1300                                 goto remove_host;
1301         }
1302
1303         printk(KERN_INFO
1304                " QLogic iSCSI HBA Driver version: %s\n"
1305                "  QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1306                qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1307                ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1308                ha->patch_number, ha->build_number);
1309
1310         return 0;
1311
1312 remove_host:
1313         qla4xxx_free_ddb_list(ha);
1314         scsi_remove_host(host);
1315
1316 probe_failed:
1317         qla4xxx_free_adapter(ha);
1318         scsi_host_put(ha->host);
1319
1320 probe_disable_device:
1321         pci_disable_device(pdev);
1322
1323         return ret;
1324 }
1325
1326 /**
1327  * qla4xxx_remove_adapter - calback function to remove adapter.
1328  * @pci_dev: PCI device pointer
1329  **/
1330 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1331 {
1332         struct scsi_qla_host *ha;
1333
1334         ha = pci_get_drvdata(pdev);
1335
1336         /* remove devs from iscsi_sessions to scsi_devices */
1337         qla4xxx_free_ddb_list(ha);
1338
1339         scsi_remove_host(ha->host);
1340
1341         qla4xxx_free_adapter(ha);
1342
1343         scsi_host_put(ha->host);
1344
1345         pci_set_drvdata(pdev, NULL);
1346 }
1347
1348 /**
1349  * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1350  * @ha: HA context
1351  *
1352  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1353  * supported addressing method.
1354  */
1355 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1356 {
1357         int retval;
1358
1359         /* Update our PCI device dma_mask for full 64 bit mask */
1360         if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1361                 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1362                         dev_dbg(&ha->pdev->dev,
1363                                   "Failed to set 64 bit PCI consistent mask; "
1364                                    "using 32 bit.\n");
1365                         retval = pci_set_consistent_dma_mask(ha->pdev,
1366                                                              DMA_32BIT_MASK);
1367                 }
1368         } else
1369                 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1370 }
1371
1372 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1373 {
1374         struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1375         struct ddb_entry *ddb = sess->dd_data;
1376
1377         sdev->hostdata = ddb;
1378         sdev->tagged_supported = 1;
1379         scsi_activate_tcq(sdev, sdev->host->can_queue);
1380         return 0;
1381 }
1382
1383 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1384 {
1385         sdev->tagged_supported = 1;
1386         return 0;
1387 }
1388
1389 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1390 {
1391         scsi_deactivate_tcq(sdev, 1);
1392 }
1393
1394 /**
1395  * qla4xxx_del_from_active_array - returns an active srb
1396  * @ha: Pointer to host adapter structure.
1397  * @index: index into to the active_array
1398  *
1399  * This routine removes and returns the srb at the specified index
1400  **/
1401 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1402 {
1403         struct srb *srb = NULL;
1404         struct scsi_cmnd *cmd;
1405
1406         if (!(cmd = scsi_host_find_tag(ha->host, index)))
1407                 return srb;
1408
1409         if (!(srb = (struct srb *)cmd->host_scribble))
1410                 return srb;
1411
1412         /* update counters */
1413         if (srb->flags & SRB_DMA_VALID) {
1414                 ha->req_q_count += srb->iocb_cnt;
1415                 ha->iocb_cnt -= srb->iocb_cnt;
1416                 if (srb->cmd)
1417                         srb->cmd->host_scribble = NULL;
1418         }
1419         return srb;
1420 }
1421
1422 /**
1423  * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1424  * @ha: actual ha whose done queue will contain the comd returned by firmware.
1425  * @cmd: Scsi Command to wait on.
1426  *
1427  * This routine waits for the command to be returned by the Firmware
1428  * for some max time.
1429  **/
1430 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1431                                       struct scsi_cmnd *cmd)
1432 {
1433         int done = 0;
1434         struct srb *rp;
1435         uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1436
1437         do {
1438                 /* Checking to see if its returned to OS */
1439                 rp = (struct srb *) cmd->SCp.ptr;
1440                 if (rp == NULL) {
1441                         done++;
1442                         break;
1443                 }
1444
1445                 msleep(2000);
1446         } while (max_wait_time--);
1447
1448         return done;
1449 }
1450
1451 /**
1452  * qla4xxx_wait_for_hba_online - waits for HBA to come online
1453  * @ha: Pointer to host adapter structure
1454  **/
1455 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1456 {
1457         unsigned long wait_online;
1458
1459         wait_online = jiffies + (30 * HZ);
1460         while (time_before(jiffies, wait_online)) {
1461
1462                 if (adapter_up(ha))
1463                         return QLA_SUCCESS;
1464                 else if (ha->retry_reset_ha_cnt == 0)
1465                         return QLA_ERROR;
1466
1467                 msleep(2000);
1468         }
1469
1470         return QLA_ERROR;
1471 }
1472
1473 /**
1474  * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1475  * @ha: pointer to to HBA
1476  * @t: target id
1477  * @l: lun id
1478  *
1479  * This function waits for all outstanding commands to a lun to complete. It
1480  * returns 0 if all pending commands are returned and 1 otherwise.
1481  **/
1482 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1483                                                  int t, int l)
1484 {
1485         int cnt;
1486         int status = 0;
1487         struct scsi_cmnd *cmd;
1488
1489         /*
1490          * Waiting for all commands for the designated target in the active
1491          * array
1492          */
1493         for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1494                 cmd = scsi_host_find_tag(ha->host, cnt);
1495                 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1496                         if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1497                                 status++;
1498                                 break;
1499                         }
1500                 }
1501         }
1502         return status;
1503 }
1504
1505 /**
1506  * qla4xxx_eh_device_reset - callback for target reset.
1507  * @cmd: Pointer to Linux's SCSI command structure
1508  *
1509  * This routine is called by the Linux OS to reset all luns on the
1510  * specified target.
1511  **/
1512 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1513 {
1514         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1515         struct ddb_entry *ddb_entry = cmd->device->hostdata;
1516         struct srb *sp;
1517         int ret = FAILED, stat;
1518
1519         sp = (struct srb *) cmd->SCp.ptr;
1520         if (!sp || !ddb_entry)
1521                 return ret;
1522
1523         dev_info(&ha->pdev->dev,
1524                    "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1525                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1526
1527         DEBUG2(printk(KERN_INFO
1528                       "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1529                       "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1530                       cmd, jiffies, cmd->timeout_per_command / HZ,
1531                       ha->dpc_flags, cmd->result, cmd->allowed));
1532
1533         /* FIXME: wait for hba to go online */
1534         stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1535         if (stat != QLA_SUCCESS) {
1536                 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1537                 goto eh_dev_reset_done;
1538         }
1539
1540         /* Send marker. */
1541         ha->marker_needed = 1;
1542
1543         /*
1544          * If we are coming down the EH path, wait for all commands to complete
1545          * for the device.
1546          */
1547         if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1548                 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1549                                                           cmd->device->id,
1550                                                           cmd->device->lun)){
1551                         dev_info(&ha->pdev->dev,
1552                                    "DEVICE RESET FAILED - waiting for "
1553                                    "commands.\n");
1554                         goto eh_dev_reset_done;
1555                 }
1556         }
1557
1558         dev_info(&ha->pdev->dev,
1559                    "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1560                    ha->host_no, cmd->device->channel, cmd->device->id,
1561                    cmd->device->lun);
1562
1563         ret = SUCCESS;
1564
1565 eh_dev_reset_done:
1566
1567         return ret;
1568 }
1569
1570 /**
1571  * qla4xxx_eh_host_reset - kernel callback
1572  * @cmd: Pointer to Linux's SCSI command structure
1573  *
1574  * This routine is invoked by the Linux kernel to perform fatal error
1575  * recovery on the specified adapter.
1576  **/
1577 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1578 {
1579         int return_status = FAILED;
1580         struct scsi_qla_host *ha;
1581
1582         ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1583
1584         dev_info(&ha->pdev->dev,
1585                    "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1586                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1587
1588         if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1589                 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host.  Adapter "
1590                               "DEAD.\n", ha->host_no, cmd->device->channel,
1591                               __func__));
1592
1593                 return FAILED;
1594         }
1595
1596         if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1597                 return_status = SUCCESS;
1598         }
1599
1600         dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1601                    return_status == FAILED ? "FAILED" : "SUCCEDED");
1602
1603         return return_status;
1604 }
1605
1606
1607 static struct pci_device_id qla4xxx_pci_tbl[] = {
1608         {
1609                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1610                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4010,
1611                 .subvendor      = PCI_ANY_ID,
1612                 .subdevice      = PCI_ANY_ID,
1613         },
1614         {
1615                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1616                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4022,
1617                 .subvendor      = PCI_ANY_ID,
1618                 .subdevice      = PCI_ANY_ID,
1619         },
1620         {
1621                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1622                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4032,
1623                 .subvendor      = PCI_ANY_ID,
1624                 .subdevice      = PCI_ANY_ID,
1625         },
1626         {0, 0},
1627 };
1628 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1629
1630 struct pci_driver qla4xxx_pci_driver = {
1631         .name           = DRIVER_NAME,
1632         .id_table       = qla4xxx_pci_tbl,
1633         .probe          = qla4xxx_probe_adapter,
1634         .remove         = qla4xxx_remove_adapter,
1635 };
1636
1637 static int __init qla4xxx_module_init(void)
1638 {
1639         int ret;
1640
1641         /* Allocate cache for SRBs. */
1642         srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1643                                        SLAB_HWCACHE_ALIGN, NULL, NULL);
1644         if (srb_cachep == NULL) {
1645                 printk(KERN_ERR
1646                        "%s: Unable to allocate SRB cache..."
1647                        "Failing load!\n", DRIVER_NAME);
1648                 ret = -ENOMEM;
1649                 goto no_srp_cache;
1650         }
1651
1652         /* Derive version string. */
1653         strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1654         if (ql4xextended_error_logging)
1655                 strcat(qla4xxx_version_str, "-debug");
1656
1657         qla4xxx_scsi_transport =
1658                 iscsi_register_transport(&qla4xxx_iscsi_transport);
1659         if (!qla4xxx_scsi_transport){
1660                 ret = -ENODEV;
1661                 goto release_srb_cache;
1662         }
1663
1664         ret = pci_register_driver(&qla4xxx_pci_driver);
1665         if (ret)
1666                 goto unregister_transport;
1667
1668         printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1669         return 0;
1670
1671 unregister_transport:
1672         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1673 release_srb_cache:
1674         kmem_cache_destroy(srb_cachep);
1675 no_srp_cache:
1676         return ret;
1677 }
1678
1679 static void __exit qla4xxx_module_exit(void)
1680 {
1681         ql4_mod_unload = 1;
1682         pci_unregister_driver(&qla4xxx_pci_driver);
1683         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1684         kmem_cache_destroy(srb_cachep);
1685 }
1686
1687 module_init(qla4xxx_module_init);
1688 module_exit(qla4xxx_module_exit);
1689
1690 MODULE_AUTHOR("QLogic Corporation");
1691 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1692 MODULE_LICENSE("GPL");
1693 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);