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_conn_stop(struct iscsi_cls_conn *conn, int flag);
  67 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
  68 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
  69
  70 /*
  71  * SCSI host template entry points
  72  */
  73 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
  74                                 void (*done) (struct scsi_cmnd *));
  75 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
  76 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
  77 static int qla4xxx_slave_alloc(struct scsi_device *device);
  78 static int qla4xxx_slave_configure(struct scsi_device *device);
  79 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
  80
  81 static struct scsi_host_template qla4xxx_driver_template = {
  82         .module                 = THIS_MODULE,
  83         .name                   = DRIVER_NAME,
  84         .proc_name              = DRIVER_NAME,
  85         .queuecommand           = qla4xxx_queuecommand,
  86
  87         .eh_device_reset_handler = qla4xxx_eh_device_reset,
  88         .eh_host_reset_handler  = qla4xxx_eh_host_reset,
  89
  90         .slave_configure        = qla4xxx_slave_configure,
  91         .slave_alloc            = qla4xxx_slave_alloc,
  92         .slave_destroy          = qla4xxx_slave_destroy,
  93
  94         .this_id                = -1,
  95         .cmd_per_lun            = 3,
  96         .use_clustering         = ENABLE_CLUSTERING,
  97         .use_sg_chaining        = ENABLE_SG_CHAINING,
  98         .sg_tablesize           = SG_ALL,
  99
 100         .max_sectors            = 0xFFFF,
 101 };
 102
 103 static struct iscsi_transport qla4xxx_iscsi_transport = {
 104         .owner                  = THIS_MODULE,
 105         .name                   = DRIVER_NAME,
 106         .caps                   = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
 107                                   CAP_DATA_PATH_OFFLOAD,
 108         .param_mask             = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
 109                                   ISCSI_TARGET_NAME | ISCSI_TPGT,
 110         .host_param_mask        = ISCSI_HOST_HWADDRESS |
 111                                   ISCSI_HOST_IPADDRESS |
 112                                   ISCSI_HOST_INITIATOR_NAME,
 113         .sessiondata_size       = sizeof(struct ddb_entry),
 114         .host_template          = &qla4xxx_driver_template,
 115
 116         .tgt_dscvr              = qla4xxx_tgt_dscvr,
 117         .get_conn_param         = qla4xxx_conn_get_param,
 118         .get_session_param      = qla4xxx_sess_get_param,
 119         .get_host_param         = qla4xxx_host_get_param,
 120         .start_conn             = qla4xxx_conn_start,
 121         .stop_conn              = qla4xxx_conn_stop,
 122         .session_recovery_timedout = qla4xxx_recovery_timedout,
 123 };
 124
 125 static struct scsi_transport_template *qla4xxx_scsi_transport;
 126
 127 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
 128 {
 129         struct ddb_entry *ddb_entry = session->dd_data;
 130         struct scsi_qla_host *ha = ddb_entry->ha;
 131
 132         DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
 133                       "secs exhausted, marking device DEAD.\n", ha->host_no,
 134                       __func__, ddb_entry->fw_ddb_index,
 135                       ha->port_down_retry_count));
 136
 137         atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 138
 139         DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
 140                       "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
 141         queue_work(ha->dpc_thread, &ha->dpc_work);
 142 }
 143
 144 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
 145 {
 146         struct iscsi_cls_session *session;
 147         struct ddb_entry *ddb_entry;
 148
 149         session = iscsi_dev_to_session(conn->dev.parent);
 150         ddb_entry = session->dd_data;
 151
 152         DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
 153                       ddb_entry->ha->host_no, __func__,
 154                       ddb_entry->fw_ddb_index));
 155         iscsi_unblock_session(session);
 156         return 0;
 157 }
 158
 159 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
 160 {
 161         struct iscsi_cls_session *session;
 162         struct ddb_entry *ddb_entry;
 163
 164         session = iscsi_dev_to_session(conn->dev.parent);
 165         ddb_entry = session->dd_data;
 166
 167         DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
 168                       ddb_entry->ha->host_no, __func__,
 169                       ddb_entry->fw_ddb_index));
 170         if (flag == STOP_CONN_RECOVER)
 171                 iscsi_block_session(session);
 172         else
 173                 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
 174 }
 175
 176 static ssize_t format_addr(char *buf, const unsigned char *addr, int len)
 177 {
 178         int i;
 179         char *cp = buf;
 180
 181         for (i = 0; i < len; i++)
 182                 cp += sprintf(cp, "%02x%c", addr[i],
 183                               i == (len - 1) ? '\n' : ':');
 184         return cp - buf;
 185 }
 186
 187
 188 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
 189                                   enum iscsi_host_param param, char *buf)
 190 {
 191         struct scsi_qla_host *ha = to_qla_host(shost);
 192         int len;
 193
 194         switch (param) {
 195         case ISCSI_HOST_PARAM_HWADDRESS:
 196                 len = format_addr(buf, ha->my_mac, MAC_ADDR_LEN);
 197                 break;
 198         case ISCSI_HOST_PARAM_IPADDRESS:
 199                 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
 200                               ha->ip_address[1], ha->ip_address[2],
 201                               ha->ip_address[3]);
 202                 break;
 203         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 204                 len = sprintf(buf, "%s\n", ha->name_string);
 205                 break;
 206         default:
 207                 return -ENOSYS;
 208         }
 209
 210         return len;
 211 }
 212
 213 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
 214                                   enum iscsi_param param, char *buf)
 215 {
 216         struct ddb_entry *ddb_entry = sess->dd_data;
 217         int len;
 218
 219         switch (param) {
 220         case ISCSI_PARAM_TARGET_NAME:
 221                 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
 222                                ddb_entry->iscsi_name);
 223                 break;
 224         case ISCSI_PARAM_TPGT:
 225                 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
 226                 break;
 227         default:
 228                 return -ENOSYS;
 229         }
 230
 231         return len;
 232 }
 233
 234 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
 235                                   enum iscsi_param param, char *buf)
 236 {
 237         struct iscsi_cls_session *session;
 238         struct ddb_entry *ddb_entry;
 239         int len;
 240
 241         session = iscsi_dev_to_session(conn->dev.parent);
 242         ddb_entry = session->dd_data;
 243
 244         switch (param) {
 245         case ISCSI_PARAM_CONN_PORT:
 246                 len = sprintf(buf, "%hu\n", ddb_entry->port);
 247                 break;
 248         case ISCSI_PARAM_CONN_ADDRESS:
 249                 /* TODO: what are the ipv6 bits */
 250                 len = sprintf(buf, "%u.%u.%u.%u\n",
 251                               NIPQUAD(ddb_entry->ip_addr));
 252                 break;
 253         default:
 254                 return -ENOSYS;
 255         }
 256
 257         return len;
 258 }
 259
 260 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
 261                              enum iscsi_tgt_dscvr type, uint32_t enable,
 262                              struct sockaddr *dst_addr)
 263 {
 264         struct scsi_qla_host *ha;
 265         struct sockaddr_in *addr;
 266         struct sockaddr_in6 *addr6;
 267         int ret = 0;
 268
 269         ha = (struct scsi_qla_host *) shost->hostdata;
 270
 271         switch (type) {
 272         case ISCSI_TGT_DSCVR_SEND_TARGETS:
 273                 if (dst_addr->sa_family == AF_INET) {
 274                         addr = (struct sockaddr_in *)dst_addr;
 275                         if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
 276                                               addr->sin_port) != QLA_SUCCESS)
 277                                 ret = -EIO;
 278                 } else if (dst_addr->sa_family == AF_INET6) {
 279                         /*
 280                          * TODO: fix qla4xxx_send_tgts
 281                          */
 282                         addr6 = (struct sockaddr_in6 *)dst_addr;
 283                         if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
 284                                               addr6->sin6_port) != QLA_SUCCESS)
 285                                 ret = -EIO;
 286                 } else
 287                         ret = -ENOSYS;
 288                 break;
 289         default:
 290                 ret = -ENOSYS;
 291         }
 292         return ret;
 293 }
 294
 295 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
 296 {
 297         if (!ddb_entry->sess)
 298                 return;
 299
 300         if (ddb_entry->conn) {
 301                 iscsi_if_destroy_session_done(ddb_entry->conn);
 302                 iscsi_destroy_conn(ddb_entry->conn);
 303                 iscsi_remove_session(ddb_entry->sess);
 304         }
 305         iscsi_free_session(ddb_entry->sess);
 306 }
 307
 308 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
 309 {
 310         int err;
 311
 312         err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
 313         if (err) {
 314                 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
 315                 return err;
 316         }
 317
 318         ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
 319         if (!ddb_entry->conn) {
 320                 iscsi_remove_session(ddb_entry->sess);
 321                 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
 322                 return -ENOMEM;
 323         }
 324
 325         ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
 326         iscsi_if_create_session_done(ddb_entry->conn);
 327         return 0;
 328 }
 329
 330 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
 331 {
 332         struct ddb_entry *ddb_entry;
 333         struct iscsi_cls_session *sess;
 334
 335         sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
 336         if (!sess)
 337                 return NULL;
 338
 339         ddb_entry = sess->dd_data;
 340         memset(ddb_entry, 0, sizeof(*ddb_entry));
 341         ddb_entry->ha = ha;
 342         ddb_entry->sess = sess;
 343         return ddb_entry;
 344 }
 345
 346 /*
 347  * Timer routines
 348  */
 349
 350 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
 351                                 unsigned long interval)
 352 {
 353         DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
 354                      __func__, ha->host->host_no));
 355         init_timer(&ha->timer);
 356         ha->timer.expires = jiffies + interval * HZ;
 357         ha->timer.data = (unsigned long)ha;
 358         ha->timer.function = (void (*)(unsigned long))func;
 359         add_timer(&ha->timer);
 360         ha->timer_active = 1;
 361 }
 362
 363 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
 364 {
 365         del_timer_sync(&ha->timer);
 366         ha->timer_active = 0;
 367 }
 368
 369 /***
 370  * qla4xxx_mark_device_missing - mark a device as missing.
 371  * @ha: Pointer to host adapter structure.
 372  * @ddb_entry: Pointer to device database entry
 373  *
 374  * This routine marks a device missing and resets the relogin retry count.
 375  **/
 376 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
 377                                  struct ddb_entry *ddb_entry)
 378 {
 379         atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
 380         DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
 381                       ha->host_no, ddb_entry->bus, ddb_entry->target,
 382                       ddb_entry->fw_ddb_index));
 383         iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
 384 }
 385
 386 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
 387                                        struct ddb_entry *ddb_entry,
 388                                        struct scsi_cmnd *cmd,
 389                                        void (*done)(struct scsi_cmnd *))
 390 {
 391         struct srb *srb;
 392
 393         srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
 394         if (!srb)
 395                 return srb;
 396
 397         atomic_set(&srb->ref_count, 1);
 398         srb->ha = ha;
 399         srb->ddb = ddb_entry;
 400         srb->cmd = cmd;
 401         srb->flags = 0;
 402         cmd->SCp.ptr = (void *)srb;
 403         cmd->scsi_done = done;
 404
 405         return srb;
 406 }
 407
 408 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
 409 {
 410         struct scsi_cmnd *cmd = srb->cmd;
 411
 412         if (srb->flags & SRB_DMA_VALID) {
 413                 scsi_dma_unmap(cmd);
 414                 srb->flags &= ~SRB_DMA_VALID;
 415         }
 416         cmd->SCp.ptr = NULL;
 417 }
 418
 419 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
 420 {
 421         struct scsi_cmnd *cmd = srb->cmd;
 422
 423         qla4xxx_srb_free_dma(ha, srb);
 424
 425         mempool_free(srb, ha->srb_mempool);
 426
 427         cmd->scsi_done(cmd);
 428 }
 429
 430 /**
 431  * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
 432  * @cmd: Pointer to Linux's SCSI command structure
 433  * @done_fn: Function that the driver calls to notify the SCSI mid-layer
 434  *      that the command has been processed.
 435  *
 436  * Remarks:
 437  * This routine is invoked by Linux to send a SCSI command to the driver.
 438  * The mid-level driver tries to ensure that queuecommand never gets
 439  * invoked concurrently with itself or the interrupt handler (although
 440  * the interrupt handler may call this routine as part of request-
 441  * completion handling).   Unfortunely, it sometimes calls the scheduler
 442  * in interrupt context which is a big NO! NO!.
 443  **/
 444 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
 445                                 void (*done)(struct scsi_cmnd *))
 446 {
 447         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
 448         struct ddb_entry *ddb_entry = cmd->device->hostdata;
 449         struct srb *srb;
 450         int rval;
 451
 452         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 453                 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
 454                         cmd->result = DID_NO_CONNECT << 16;
 455                         goto qc_fail_command;
 456                 }
 457                 goto qc_host_busy;
 458         }
 459
 460         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
 461                 goto qc_host_busy;
 462
 463         spin_unlock_irq(ha->host->host_lock);
 464
 465         srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
 466         if (!srb)
 467                 goto qc_host_busy_lock;
 468
 469         rval = qla4xxx_send_command_to_isp(ha, srb);
 470         if (rval != QLA_SUCCESS)
 471                 goto qc_host_busy_free_sp;
 472
 473         spin_lock_irq(ha->host->host_lock);
 474         return 0;
 475
 476 qc_host_busy_free_sp:
 477         qla4xxx_srb_free_dma(ha, srb);
 478         mempool_free(srb, ha->srb_mempool);
 479
 480 qc_host_busy_lock:
 481         spin_lock_irq(ha->host->host_lock);
 482
 483 qc_host_busy:
 484         return SCSI_MLQUEUE_HOST_BUSY;
 485
 486 qc_fail_command:
 487         done(cmd);
 488
 489         return 0;
 490 }
 491
 492 /**
 493  * qla4xxx_mem_free - frees memory allocated to adapter
 494  * @ha: Pointer to host adapter structure.
 495  *
 496  * Frees memory previously allocated by qla4xxx_mem_alloc
 497  **/
 498 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
 499 {
 500         if (ha->queues)
 501                 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
 502                                   ha->queues_dma);
 503
 504         ha->queues_len = 0;
 505         ha->queues = NULL;
 506         ha->queues_dma = 0;
 507         ha->request_ring = NULL;
 508         ha->request_dma = 0;
 509         ha->response_ring = NULL;
 510         ha->response_dma = 0;
 511         ha->shadow_regs = NULL;
 512         ha->shadow_regs_dma = 0;
 513
 514         /* Free srb pool. */
 515         if (ha->srb_mempool)
 516                 mempool_destroy(ha->srb_mempool);
 517
 518         ha->srb_mempool = NULL;
 519
 520         /* release io space registers  */
 521         if (ha->reg)
 522                 iounmap(ha->reg);
 523         pci_release_regions(ha->pdev);
 524 }
 525
 526 /**
 527  * qla4xxx_mem_alloc - allocates memory for use by adapter.
 528  * @ha: Pointer to host adapter structure
 529  *
 530  * Allocates DMA memory for request and response queues. Also allocates memory
 531  * for srbs.
 532  **/
 533 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 534 {
 535         unsigned long align;
 536
 537         /* Allocate contiguous block of DMA memory for queues. */
 538         ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 539                           (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
 540                           sizeof(struct shadow_regs) +
 541                           MEM_ALIGN_VALUE +
 542                           (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 543         ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
 544                                         &ha->queues_dma, GFP_KERNEL);
 545         if (ha->queues == NULL) {
 546                 dev_warn(&ha->pdev->dev,
 547                         "Memory Allocation failed - queues.\n");
 548
 549                 goto mem_alloc_error_exit;
 550         }
 551         memset(ha->queues, 0, ha->queues_len);
 552
 553         /*
 554          * As per RISC alignment requirements -- the bus-address must be a
 555          * multiple of the request-ring size (in bytes).
 556          */
 557         align = 0;
 558         if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
 559                 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
 560                                            (MEM_ALIGN_VALUE - 1));
 561
 562         /* Update request and response queue pointers. */
 563         ha->request_dma = ha->queues_dma + align;
 564         ha->request_ring = (struct queue_entry *) (ha->queues + align);
 565         ha->response_dma = ha->queues_dma + align +
 566                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
 567         ha->response_ring = (struct queue_entry *) (ha->queues + align +
 568                                                     (REQUEST_QUEUE_DEPTH *
 569                                                      QUEUE_SIZE));
 570         ha->shadow_regs_dma = ha->queues_dma + align +
 571                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 572                 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
 573         ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
 574                                                   (REQUEST_QUEUE_DEPTH *
 575                                                    QUEUE_SIZE) +
 576                                                   (RESPONSE_QUEUE_DEPTH *
 577                                                    QUEUE_SIZE));
 578
 579         /* Allocate memory for srb pool. */
 580         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
 581                                          mempool_free_slab, srb_cachep);
 582         if (ha->srb_mempool == NULL) {
 583                 dev_warn(&ha->pdev->dev,
 584                         "Memory Allocation failed - SRB Pool.\n");
 585
 586                 goto mem_alloc_error_exit;
 587         }
 588
 589         return QLA_SUCCESS;
 590
 591 mem_alloc_error_exit:
 592         qla4xxx_mem_free(ha);
 593         return QLA_ERROR;
 594 }
 595
 596 /**
 597  * qla4xxx_timer - checks every second for work to do.
 598  * @ha: Pointer to host adapter structure.
 599  **/
 600 static void qla4xxx_timer(struct scsi_qla_host *ha)
 601 {
 602         struct ddb_entry *ddb_entry, *dtemp;
 603         int start_dpc = 0;
 604
 605         /* Search for relogin's to time-out and port down retry. */
 606         list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
 607                 /* Count down time between sending relogins */
 608                 if (adapter_up(ha) &&
 609                     !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
 610                     atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 611                         if (atomic_read(&ddb_entry->retry_relogin_timer) !=
 612                             INVALID_ENTRY) {
 613                                 if (atomic_read(&ddb_entry->retry_relogin_timer)
 614                                                 == 0) {
 615                                         atomic_set(&ddb_entry->
 616                                                 retry_relogin_timer,
 617                                                 INVALID_ENTRY);
 618                                         set_bit(DPC_RELOGIN_DEVICE,
 619                                                 &ha->dpc_flags);
 620                                         set_bit(DF_RELOGIN, &ddb_entry->flags);
 621                                         DEBUG2(printk("scsi%ld: %s: index [%d]"
 622                                                       " login device\n",
 623                                                       ha->host_no, __func__,
 624                                                       ddb_entry->fw_ddb_index));
 625                                 } else
 626                                         atomic_dec(&ddb_entry->
 627                                                         retry_relogin_timer);
 628                         }
 629                 }
 630
 631                 /* Wait for relogin to timeout */
 632                 if (atomic_read(&ddb_entry->relogin_timer) &&
 633                     (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
 634                         /*
 635                          * If the relogin times out and the device is
 636                          * still NOT ONLINE then try and relogin again.
 637                          */
 638                         if (atomic_read(&ddb_entry->state) !=
 639                             DDB_STATE_ONLINE &&
 640                             ddb_entry->fw_ddb_device_state ==
 641                             DDB_DS_SESSION_FAILED) {
 642                                 /* Reset retry relogin timer */
 643                                 atomic_inc(&ddb_entry->relogin_retry_count);
 644                                 DEBUG2(printk("scsi%ld: index[%d] relogin"
 645                                               " timed out-retrying"
 646                                               " relogin (%d)\n",
 647                                               ha->host_no,
 648                                               ddb_entry->fw_ddb_index,
 649                                               atomic_read(&ddb_entry->
 650                                                           relogin_retry_count))
 651                                         );
 652                                 start_dpc++;
 653                                 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
 654                                              "initate relogin after"
 655                                              " %d seconds\n",
 656                                              ha->host_no, ddb_entry->bus,
 657                                              ddb_entry->target,
 658                                              ddb_entry->fw_ddb_index,
 659                                              ddb_entry->default_time2wait + 4)
 660                                         );
 661
 662                                 atomic_set(&ddb_entry->retry_relogin_timer,
 663                                            ddb_entry->default_time2wait + 4);
 664                         }
 665                 }
 666         }
 667
 668         /* Check for heartbeat interval. */
 669         if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
 670             ha->heartbeat_interval != 0) {
 671                 ha->seconds_since_last_heartbeat++;
 672                 if (ha->seconds_since_last_heartbeat >
 673                     ha->heartbeat_interval + 2)
 674                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 675         }
 676
 677
 678         /* Wakeup the dpc routine for this adapter, if needed. */
 679         if ((start_dpc ||
 680              test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 681              test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
 682              test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
 683              test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
 684              test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 685              test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
 686              test_bit(DPC_AEN, &ha->dpc_flags)) &&
 687              ha->dpc_thread) {
 688                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
 689                               " - dpc flags = 0x%lx\n",
 690                               ha->host_no, __func__, ha->dpc_flags));
 691                 queue_work(ha->dpc_thread, &ha->dpc_work);
 692         }
 693
 694         /* Reschedule timer thread to call us back in one second */
 695         mod_timer(&ha->timer, jiffies + HZ);
 696
 697         DEBUG2(ha->seconds_since_last_intr++);
 698 }
 699
 700 /**
 701  * qla4xxx_cmd_wait - waits for all outstanding commands to complete
 702  * @ha: Pointer to host adapter structure.
 703  *
 704  * This routine stalls the driver until all outstanding commands are returned.
 705  * Caller must release the Hardware Lock prior to calling this routine.
 706  **/
 707 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
 708 {
 709         uint32_t index = 0;
 710         int stat = QLA_SUCCESS;
 711         unsigned long flags;
 712         struct scsi_cmnd *cmd;
 713         int wait_cnt = WAIT_CMD_TOV;    /*
 714                                          * Initialized for 30 seconds as we
 715                                          * expect all commands to retuned
 716                                          * ASAP.
 717                                          */
 718
 719         while (wait_cnt) {
 720                 spin_lock_irqsave(&ha->hardware_lock, flags);
 721                 /* Find a command that hasn't completed. */
 722                 for (index = 0; index < ha->host->can_queue; index++) {
 723                         cmd = scsi_host_find_tag(ha->host, index);
 724                         if (cmd != NULL)
 725                                 break;
 726                 }
 727                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 728
 729                 /* If No Commands are pending, wait is complete */
 730                 if (index == ha->host->can_queue) {
 731                         break;
 732                 }
 733
 734                 /* If we timed out on waiting for commands to come back
 735                  * return ERROR.
 736                  */
 737                 wait_cnt--;
 738                 if (wait_cnt == 0)
 739                         stat = QLA_ERROR;
 740                 else {
 741                         msleep(1000);
 742                 }
 743         }                       /* End of While (wait_cnt) */
 744
 745         return stat;
 746 }
 747
 748 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
 749 {
 750         uint32_t ctrl_status;
 751         unsigned long flags = 0;
 752
 753         DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
 754
 755         spin_lock_irqsave(&ha->hardware_lock, flags);
 756
 757         /*
 758          * If the SCSI Reset Interrupt bit is set, clear it.
 759          * Otherwise, the Soft Reset won't work.
 760          */
 761         ctrl_status = readw(&ha->reg->ctrl_status);
 762         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
 763                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 764
 765         /* Issue Soft Reset */
 766         writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
 767         readl(&ha->reg->ctrl_status);
 768
 769         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 770 }
 771
 772 /**
 773  * qla4xxx_soft_reset - performs soft reset.
 774  * @ha: Pointer to host adapter structure.
 775  **/
 776 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
 777 {
 778         uint32_t max_wait_time;
 779         unsigned long flags = 0;
 780         int status = QLA_ERROR;
 781         uint32_t ctrl_status;
 782
 783         qla4xxx_hw_reset(ha);
 784
 785         /* Wait until the Network Reset Intr bit is cleared */
 786         max_wait_time = RESET_INTR_TOV;
 787         do {
 788                 spin_lock_irqsave(&ha->hardware_lock, flags);
 789                 ctrl_status = readw(&ha->reg->ctrl_status);
 790                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 791
 792                 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
 793                         break;
 794
 795                 msleep(1000);
 796         } while ((--max_wait_time));
 797
 798         if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
 799                 DEBUG2(printk(KERN_WARNING
 800                               "scsi%ld: Network Reset Intr not cleared by "
 801                               "Network function, clearing it now!\n",
 802                               ha->host_no));
 803                 spin_lock_irqsave(&ha->hardware_lock, flags);
 804                 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
 805                 readl(&ha->reg->ctrl_status);
 806                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 807         }
 808
 809         /* Wait until the firmware tells us the Soft Reset is done */
 810         max_wait_time = SOFT_RESET_TOV;
 811         do {
 812                 spin_lock_irqsave(&ha->hardware_lock, flags);
 813                 ctrl_status = readw(&ha->reg->ctrl_status);
 814                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 815
 816                 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
 817                         status = QLA_SUCCESS;
 818                         break;
 819                 }
 820
 821                 msleep(1000);
 822         } while ((--max_wait_time));
 823
 824         /*
 825          * Also, make sure that the SCSI Reset Interrupt bit has been cleared
 826          * after the soft reset has taken place.
 827          */
 828         spin_lock_irqsave(&ha->hardware_lock, flags);
 829         ctrl_status = readw(&ha->reg->ctrl_status);
 830         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
 831                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 832                 readl(&ha->reg->ctrl_status);
 833         }
 834         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 835
 836         /* If soft reset fails then most probably the bios on other
 837          * function is also enabled.
 838          * Since the initialization is sequential the other fn
 839          * wont be able to acknowledge the soft reset.
 840          * Issue a force soft reset to workaround this scenario.
 841          */
 842         if (max_wait_time == 0) {
 843                 /* Issue Force Soft Reset */
 844                 spin_lock_irqsave(&ha->hardware_lock, flags);
 845                 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
 846                 readl(&ha->reg->ctrl_status);
 847                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 848                 /* Wait until the firmware tells us the Soft Reset is done */
 849                 max_wait_time = SOFT_RESET_TOV;
 850                 do {
 851                         spin_lock_irqsave(&ha->hardware_lock, flags);
 852                         ctrl_status = readw(&ha->reg->ctrl_status);
 853                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 854
 855                         if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
 856                                 status = QLA_SUCCESS;
 857                                 break;
 858                         }
 859
 860                         msleep(1000);
 861                 } while ((--max_wait_time));
 862         }
 863
 864         return status;
 865 }
 866
 867 /**
 868  * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
 869  * @ha: Pointer to host adapter structure.
 870  *
 871  * This routine is called just prior to a HARD RESET to return all
 872  * outstanding commands back to the Operating System.
 873  * Caller should make sure that the following locks are released
 874  * before this calling routine: Hardware lock, and io_request_lock.
 875  **/
 876 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
 877 {
 878         struct srb *srb;
 879         int i;
 880         unsigned long flags;
 881
 882         spin_lock_irqsave(&ha->hardware_lock, flags);
 883         for (i = 0; i < ha->host->can_queue; i++) {
 884                 srb = qla4xxx_del_from_active_array(ha, i);
 885                 if (srb != NULL) {
 886                         srb->cmd->result = DID_RESET << 16;
 887                         qla4xxx_srb_compl(ha, srb);
 888                 }
 889         }
 890         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 891
 892 }
 893
 894 /**
 895  * qla4xxx_recover_adapter - recovers adapter after a fatal error
 896  * @ha: Pointer to host adapter structure.
 897  * @renew_ddb_list: Indicates what to do with the adapter's ddb list
 898  *      after adapter recovery has completed.
 899  *      0=preserve ddb list, 1=destroy and rebuild ddb list
 900  **/
 901 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
 902                                 uint8_t renew_ddb_list)
 903 {
 904         int status;
 905
 906         /* Stall incoming I/O until we are done */
 907         clear_bit(AF_ONLINE, &ha->flags);
 908         DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
 909                       __func__));
 910
 911         /* Wait for outstanding commands to complete.
 912          * Stalls the driver for max 30 secs
 913          */
 914         status = qla4xxx_cmd_wait(ha);
 915
 916         qla4xxx_disable_intrs(ha);
 917
 918         /* Flush any pending ddb changed AENs */
 919         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 920
 921         /* Reset the firmware.  If successful, function
 922          * returns with ISP interrupts enabled.
 923          */
 924         if (status == QLA_SUCCESS) {
 925                 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
 926                               ha->host_no, __func__));
 927                 qla4xxx_flush_active_srbs(ha);
 928                 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
 929                         status = qla4xxx_soft_reset(ha);
 930                 else
 931                         status = QLA_ERROR;
 932         }
 933
 934         /* Flush any pending ddb changed AENs */
 935         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
 936
 937         /* Re-initialize firmware. If successful, function returns
 938          * with ISP interrupts enabled */
 939         if (status == QLA_SUCCESS) {
 940                 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
 941                               ha->host_no, __func__));
 942
 943                 /* If successful, AF_ONLINE flag set in
 944                  * qla4xxx_initialize_adapter */
 945                 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
 946         }
 947
 948         /* Failed adapter initialization?
 949          * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
 950         if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
 951             (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
 952                 /* Adapter initialization failed, see if we can retry
 953                  * resetting the ha */
 954                 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
 955                         ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
 956                         DEBUG2(printk("scsi%ld: recover adapter - retrying "
 957                                       "(%d) more times\n", ha->host_no,
 958                                       ha->retry_reset_ha_cnt));
 959                         set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 960                         status = QLA_ERROR;
 961                 } else {
 962                         if (ha->retry_reset_ha_cnt > 0) {
 963                                 /* Schedule another Reset HA--DPC will retry */
 964                                 ha->retry_reset_ha_cnt--;
 965                                 DEBUG2(printk("scsi%ld: recover adapter - "
 966                                               "retry remaining %d\n",
 967                                               ha->host_no,
 968                                               ha->retry_reset_ha_cnt));
 969                                 status = QLA_ERROR;
 970                         }
 971
 972                         if (ha->retry_reset_ha_cnt == 0) {
 973                                 /* Recover adapter retries have been exhausted.
 974                                  * Adapter DEAD */
 975                                 DEBUG2(printk("scsi%ld: recover adapter "
 976                                               "failed - board disabled\n",
 977                                               ha->host_no));
 978                                 qla4xxx_flush_active_srbs(ha);
 979                                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 980                                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 981                                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
 982                                           &ha->dpc_flags);
 983                                 status = QLA_ERROR;
 984                         }
 985                 }
 986         } else {
 987                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
 988                 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
 989                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
 990         }
 991
 992         ha->adapter_error_count++;
 993
 994         if (status == QLA_SUCCESS)
 995                 qla4xxx_enable_intrs(ha);
 996
 997         DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
 998         return status;
 999 }
1000
1001 /**
1002  * qla4xxx_do_dpc - dpc routine
1003  * @data: in our case pointer to adapter structure
1004  *
1005  * This routine is a task that is schedule by the interrupt handler
1006  * to perform the background processing for interrupts.  We put it
1007  * on a task queue that is consumed whenever the scheduler runs; that's
1008  * so you can do anything (i.e. put the process to sleep etc).  In fact,
1009  * the mid-level tries to sleep when it reaches the driver threshold
1010  * "host->can_queue". This can cause a panic if we were in our interrupt code.
1011  **/
1012 static void qla4xxx_do_dpc(struct work_struct *work)
1013 {
1014         struct scsi_qla_host *ha =
1015                 container_of(work, struct scsi_qla_host, dpc_work);
1016         struct ddb_entry *ddb_entry, *dtemp;
1017         int status = QLA_ERROR;
1018
1019         DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1020                 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1021                 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1022                 readw(&ha->reg->ctrl_status)));
1023
1024         /* Initialization not yet finished. Don't do anything yet. */
1025         if (!test_bit(AF_INIT_DONE, &ha->flags))
1026                 return;
1027
1028         if (adapter_up(ha) ||
1029             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1030             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1031             test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1032                 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1033                         test_bit(DPC_RESET_HA, &ha->dpc_flags))
1034                         qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1035
1036                 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1037                         uint8_t wait_time = RESET_INTR_TOV;
1038
1039                         while ((readw(&ha->reg->ctrl_status) &
1040                                 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1041                                 if (--wait_time == 0)
1042                                         break;
1043                                 msleep(1000);
1044                         }
1045                         if (wait_time == 0)
1046                                 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1047                                               "bit not cleared-- resetting\n",
1048                                               ha->host_no, __func__));
1049                         qla4xxx_flush_active_srbs(ha);
1050                         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1051                                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1052                                 status = qla4xxx_initialize_adapter(ha,
1053                                                 PRESERVE_DDB_LIST);
1054                         }
1055                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1056                         if (status == QLA_SUCCESS)
1057                                 qla4xxx_enable_intrs(ha);
1058                 }
1059         }
1060
1061         /* ---- process AEN? --- */
1062         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1063                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1064
1065         /* ---- Get DHCP IP Address? --- */
1066         if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1067                 qla4xxx_get_dhcp_ip_address(ha);
1068
1069         /* ---- relogin device? --- */
1070         if (adapter_up(ha) &&
1071             test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1072                 list_for_each_entry_safe(ddb_entry, dtemp,
1073                                          &ha->ddb_list, list) {
1074                         if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1075                             atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1076                                 qla4xxx_relogin_device(ha, ddb_entry);
1077
1078                         /*
1079                          * If mbx cmd times out there is no point
1080                          * in continuing further.
1081                          * With large no of targets this can hang
1082                          * the system.
1083                          */
1084                         if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1085                                 printk(KERN_WARNING "scsi%ld: %s: "
1086                                        "need to reset hba\n",
1087                                        ha->host_no, __func__);
1088                                 break;
1089                         }
1090                 }
1091         }
1092 }
1093
1094 /**
1095  * qla4xxx_free_adapter - release the adapter
1096  * @ha: pointer to adapter structure
1097  **/
1098 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1099 {
1100
1101         if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1102                 /* Turn-off interrupts on the card. */
1103                 qla4xxx_disable_intrs(ha);
1104         }
1105
1106         /* Kill the kernel thread for this host */
1107         if (ha->dpc_thread)
1108                 destroy_workqueue(ha->dpc_thread);
1109
1110         /* Issue Soft Reset to put firmware in unknown state */
1111         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1112                 qla4xxx_hw_reset(ha);
1113
1114         /* Remove timer thread, if present */
1115         if (ha->timer_active)
1116                 qla4xxx_stop_timer(ha);
1117
1118         /* Detach interrupts */
1119         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1120                 free_irq(ha->pdev->irq, ha);
1121
1122         /* free extra memory */
1123         qla4xxx_mem_free(ha);
1124
1125         pci_disable_device(ha->pdev);
1126
1127 }
1128
1129 /***
1130  * qla4xxx_iospace_config - maps registers
1131  * @ha: pointer to adapter structure
1132  *
1133  * This routines maps HBA's registers from the pci address space
1134  * into the kernel virtual address space for memory mapped i/o.
1135  **/
1136 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1137 {
1138         unsigned long pio, pio_len, pio_flags;
1139         unsigned long mmio, mmio_len, mmio_flags;
1140
1141         pio = pci_resource_start(ha->pdev, 0);
1142         pio_len = pci_resource_len(ha->pdev, 0);
1143         pio_flags = pci_resource_flags(ha->pdev, 0);
1144         if (pio_flags & IORESOURCE_IO) {
1145                 if (pio_len < MIN_IOBASE_LEN) {
1146                         dev_warn(&ha->pdev->dev,
1147                                 "Invalid PCI I/O region size\n");
1148                         pio = 0;
1149                 }
1150         } else {
1151                 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1152                 pio = 0;
1153         }
1154
1155         /* Use MMIO operations for all accesses. */
1156         mmio = pci_resource_start(ha->pdev, 1);
1157         mmio_len = pci_resource_len(ha->pdev, 1);
1158         mmio_flags = pci_resource_flags(ha->pdev, 1);
1159
1160         if (!(mmio_flags & IORESOURCE_MEM)) {
1161                 dev_err(&ha->pdev->dev,
1162                         "region #0 not an MMIO resource, aborting\n");
1163
1164                 goto iospace_error_exit;
1165         }
1166         if (mmio_len < MIN_IOBASE_LEN) {
1167                 dev_err(&ha->pdev->dev,
1168                         "Invalid PCI mem region size, aborting\n");
1169                 goto iospace_error_exit;
1170         }
1171
1172         if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1173                 dev_warn(&ha->pdev->dev,
1174                         "Failed to reserve PIO/MMIO regions\n");
1175
1176                 goto iospace_error_exit;
1177         }
1178
1179         ha->pio_address = pio;
1180         ha->pio_length = pio_len;
1181         ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1182         if (!ha->reg) {
1183                 dev_err(&ha->pdev->dev,
1184                         "cannot remap MMIO, aborting\n");
1185
1186                 goto iospace_error_exit;
1187         }
1188
1189         return 0;
1190
1191 iospace_error_exit:
1192         return -ENOMEM;
1193 }
1194
1195 /**
1196  * qla4xxx_probe_adapter - callback function to probe HBA
1197  * @pdev: pointer to pci_dev structure
1198  * @pci_device_id: pointer to pci_device entry
1199  *
1200  * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1201  * It returns zero if successful. It also initializes all data necessary for
1202  * the driver.
1203  **/
1204 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1205                                            const struct pci_device_id *ent)
1206 {
1207         int ret = -ENODEV, status;
1208         struct Scsi_Host *host;
1209         struct scsi_qla_host *ha;
1210         struct ddb_entry *ddb_entry, *ddbtemp;
1211         uint8_t init_retry_count = 0;
1212         char buf[34];
1213
1214         if (pci_enable_device(pdev))
1215                 return -1;
1216
1217         host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1218         if (host == NULL) {
1219                 printk(KERN_WARNING
1220                        "qla4xxx: Couldn't allocate host from scsi layer!\n");
1221                 goto probe_disable_device;
1222         }
1223
1224         /* Clear our data area */
1225         ha = (struct scsi_qla_host *) host->hostdata;
1226         memset(ha, 0, sizeof(*ha));
1227
1228         /* Save the information from PCI BIOS.  */
1229         ha->pdev = pdev;
1230         ha->host = host;
1231         ha->host_no = host->host_no;
1232
1233         /* Configure PCI I/O space. */
1234         ret = qla4xxx_iospace_config(ha);
1235         if (ret)
1236                 goto probe_failed;
1237
1238         dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1239                    pdev->device, pdev->irq, ha->reg);
1240
1241         qla4xxx_config_dma_addressing(ha);
1242
1243         /* Initialize lists and spinlocks. */
1244         INIT_LIST_HEAD(&ha->ddb_list);
1245         INIT_LIST_HEAD(&ha->free_srb_q);
1246
1247         mutex_init(&ha->mbox_sem);
1248
1249         spin_lock_init(&ha->hardware_lock);
1250
1251         /* Allocate dma buffers */
1252         if (qla4xxx_mem_alloc(ha)) {
1253                 dev_warn(&ha->pdev->dev,
1254                            "[ERROR] Failed to allocate memory for adapter\n");
1255
1256                 ret = -ENOMEM;
1257                 goto probe_failed;
1258         }
1259
1260         /*
1261          * Initialize the Host adapter request/response queues and
1262          * firmware
1263          * NOTE: interrupts enabled upon successful completion
1264          */
1265         status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1266         while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1267                 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1268                               "(%d)\n", __func__, init_retry_count));
1269                 qla4xxx_soft_reset(ha);
1270                 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1271         }
1272         if (status == QLA_ERROR) {
1273                 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1274
1275                 ret = -ENODEV;
1276                 goto probe_failed;
1277         }
1278
1279         host->cmd_per_lun = 3;
1280         host->max_channel = 0;
1281         host->max_lun = MAX_LUNS - 1;
1282         host->max_id = MAX_TARGETS;
1283         host->max_cmd_len = IOCB_MAX_CDB_LEN;
1284         host->can_queue = MAX_SRBS ;
1285         host->transportt = qla4xxx_scsi_transport;
1286
1287         ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1288         if (ret) {
1289                 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1290                 goto probe_failed;
1291         }
1292
1293         /* Startup the kernel thread for this host adapter. */
1294         DEBUG2(printk("scsi: %s: Starting kernel thread for "
1295                       "qla4xxx_dpc\n", __func__));
1296         sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1297         ha->dpc_thread = create_singlethread_workqueue(buf);
1298         if (!ha->dpc_thread) {
1299                 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1300                 ret = -ENODEV;
1301                 goto probe_failed;
1302         }
1303         INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1304
1305         ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1306                           IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1307         if (ret) {
1308                 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1309                         " already in use.\n", pdev->irq);
1310                 goto probe_failed;
1311         }
1312         set_bit(AF_IRQ_ATTACHED, &ha->flags);
1313         host->irq = pdev->irq;
1314         DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1315
1316         qla4xxx_enable_intrs(ha);
1317
1318         /* Start timer thread. */
1319         qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1320
1321         set_bit(AF_INIT_DONE, &ha->flags);
1322
1323         pci_set_drvdata(pdev, ha);
1324
1325         ret = scsi_add_host(host, &pdev->dev);
1326         if (ret)
1327                 goto probe_failed;
1328
1329         /* Update transport device information for all devices. */
1330         list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1331                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1332                         if (qla4xxx_add_sess(ddb_entry))
1333                                 goto remove_host;
1334         }
1335
1336         printk(KERN_INFO
1337                " QLogic iSCSI HBA Driver version: %s\n"
1338                "  QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1339                qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1340                ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1341                ha->patch_number, ha->build_number);
1342
1343         return 0;
1344
1345 remove_host:
1346         qla4xxx_free_ddb_list(ha);
1347         scsi_remove_host(host);
1348
1349 probe_failed:
1350         qla4xxx_free_adapter(ha);
1351         scsi_host_put(ha->host);
1352
1353 probe_disable_device:
1354         pci_disable_device(pdev);
1355
1356         return ret;
1357 }
1358
1359 /**
1360  * qla4xxx_remove_adapter - calback function to remove adapter.
1361  * @pci_dev: PCI device pointer
1362  **/
1363 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1364 {
1365         struct scsi_qla_host *ha;
1366
1367         ha = pci_get_drvdata(pdev);
1368
1369         qla4xxx_disable_intrs(ha);
1370
1371         while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1372                 ssleep(1);
1373
1374         /* remove devs from iscsi_sessions to scsi_devices */
1375         qla4xxx_free_ddb_list(ha);
1376
1377         scsi_remove_host(ha->host);
1378
1379         qla4xxx_free_adapter(ha);
1380
1381         scsi_host_put(ha->host);
1382
1383         pci_set_drvdata(pdev, NULL);
1384 }
1385
1386 /**
1387  * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1388  * @ha: HA context
1389  *
1390  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1391  * supported addressing method.
1392  */
1393 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1394 {
1395         int retval;
1396
1397         /* Update our PCI device dma_mask for full 64 bit mask */
1398         if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1399                 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1400                         dev_dbg(&ha->pdev->dev,
1401                                   "Failed to set 64 bit PCI consistent mask; "
1402                                    "using 32 bit.\n");
1403                         retval = pci_set_consistent_dma_mask(ha->pdev,
1404                                                              DMA_32BIT_MASK);
1405                 }
1406         } else
1407                 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1408 }
1409
1410 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1411 {
1412         struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1413         struct ddb_entry *ddb = sess->dd_data;
1414
1415         sdev->hostdata = ddb;
1416         sdev->tagged_supported = 1;
1417         scsi_activate_tcq(sdev, sdev->host->can_queue);
1418         return 0;
1419 }
1420
1421 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1422 {
1423         sdev->tagged_supported = 1;
1424         return 0;
1425 }
1426
1427 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1428 {
1429         scsi_deactivate_tcq(sdev, 1);
1430 }
1431
1432 /**
1433  * qla4xxx_del_from_active_array - returns an active srb
1434  * @ha: Pointer to host adapter structure.
1435  * @index: index into to the active_array
1436  *
1437  * This routine removes and returns the srb at the specified index
1438  **/
1439 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1440 {
1441         struct srb *srb = NULL;
1442         struct scsi_cmnd *cmd;
1443
1444         if (!(cmd = scsi_host_find_tag(ha->host, index)))
1445                 return srb;
1446
1447         if (!(srb = (struct srb *)cmd->host_scribble))
1448                 return srb;
1449
1450         /* update counters */
1451         if (srb->flags & SRB_DMA_VALID) {
1452                 ha->req_q_count += srb->iocb_cnt;
1453                 ha->iocb_cnt -= srb->iocb_cnt;
1454                 if (srb->cmd)
1455                         srb->cmd->host_scribble = NULL;
1456         }
1457         return srb;
1458 }
1459
1460 /**
1461  * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1462  * @ha: actual ha whose done queue will contain the comd returned by firmware.
1463  * @cmd: Scsi Command to wait on.
1464  *
1465  * This routine waits for the command to be returned by the Firmware
1466  * for some max time.
1467  **/
1468 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1469                                       struct scsi_cmnd *cmd)
1470 {
1471         int done = 0;
1472         struct srb *rp;
1473         uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1474
1475         do {
1476                 /* Checking to see if its returned to OS */
1477                 rp = (struct srb *) cmd->SCp.ptr;
1478                 if (rp == NULL) {
1479                         done++;
1480                         break;
1481                 }
1482
1483                 msleep(2000);
1484         } while (max_wait_time--);
1485
1486         return done;
1487 }
1488
1489 /**
1490  * qla4xxx_wait_for_hba_online - waits for HBA to come online
1491  * @ha: Pointer to host adapter structure
1492  **/
1493 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1494 {
1495         unsigned long wait_online;
1496
1497         wait_online = jiffies + (30 * HZ);
1498         while (time_before(jiffies, wait_online)) {
1499
1500                 if (adapter_up(ha))
1501                         return QLA_SUCCESS;
1502                 else if (ha->retry_reset_ha_cnt == 0)
1503                         return QLA_ERROR;
1504
1505                 msleep(2000);
1506         }
1507
1508         return QLA_ERROR;
1509 }
1510
1511 /**
1512  * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1513  * @ha: pointer to to HBA
1514  * @t: target id
1515  * @l: lun id
1516  *
1517  * This function waits for all outstanding commands to a lun to complete. It
1518  * returns 0 if all pending commands are returned and 1 otherwise.
1519  **/
1520 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1521                                                  int t, int l)
1522 {
1523         int cnt;
1524         int status = 0;
1525         struct scsi_cmnd *cmd;
1526
1527         /*
1528          * Waiting for all commands for the designated target in the active
1529          * array
1530          */
1531         for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1532                 cmd = scsi_host_find_tag(ha->host, cnt);
1533                 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1534                         if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1535                                 status++;
1536                                 break;
1537                         }
1538                 }
1539         }
1540         return status;
1541 }
1542
1543 /**
1544  * qla4xxx_eh_device_reset - callback for target reset.
1545  * @cmd: Pointer to Linux's SCSI command structure
1546  *
1547  * This routine is called by the Linux OS to reset all luns on the
1548  * specified target.
1549  **/
1550 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1551 {
1552         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1553         struct ddb_entry *ddb_entry = cmd->device->hostdata;
1554         struct srb *sp;
1555         int ret = FAILED, stat;
1556
1557         sp = (struct srb *) cmd->SCp.ptr;
1558         if (!sp || !ddb_entry)
1559                 return ret;
1560
1561         dev_info(&ha->pdev->dev,
1562                    "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1563                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1564
1565         DEBUG2(printk(KERN_INFO
1566                       "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1567                       "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1568                       cmd, jiffies, cmd->timeout_per_command / HZ,
1569                       ha->dpc_flags, cmd->result, cmd->allowed));
1570
1571         /* FIXME: wait for hba to go online */
1572         stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1573         if (stat != QLA_SUCCESS) {
1574                 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1575                 goto eh_dev_reset_done;
1576         }
1577
1578         /* Send marker. */
1579         ha->marker_needed = 1;
1580
1581         /*
1582          * If we are coming down the EH path, wait for all commands to complete
1583          * for the device.
1584          */
1585         if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1586                 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1587                                                           cmd->device->id,
1588                                                           cmd->device->lun)){
1589                         dev_info(&ha->pdev->dev,
1590                                    "DEVICE RESET FAILED - waiting for "
1591                                    "commands.\n");
1592                         goto eh_dev_reset_done;
1593                 }
1594         }
1595
1596         dev_info(&ha->pdev->dev,
1597                    "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1598                    ha->host_no, cmd->device->channel, cmd->device->id,
1599                    cmd->device->lun);
1600
1601         ret = SUCCESS;
1602
1603 eh_dev_reset_done:
1604
1605         return ret;
1606 }
1607
1608 /**
1609  * qla4xxx_eh_host_reset - kernel callback
1610  * @cmd: Pointer to Linux's SCSI command structure
1611  *
1612  * This routine is invoked by the Linux kernel to perform fatal error
1613  * recovery on the specified adapter.
1614  **/
1615 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1616 {
1617         int return_status = FAILED;
1618         struct scsi_qla_host *ha;
1619
1620         ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1621
1622         dev_info(&ha->pdev->dev,
1623                    "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1624                    cmd->device->channel, cmd->device->id, cmd->device->lun);
1625
1626         if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1627                 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host.  Adapter "
1628                               "DEAD.\n", ha->host_no, cmd->device->channel,
1629                               __func__));
1630
1631                 return FAILED;
1632         }
1633
1634         if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1635                 return_status = SUCCESS;
1636         }
1637
1638         dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1639                    return_status == FAILED ? "FAILED" : "SUCCEDED");
1640
1641         return return_status;
1642 }
1643
1644
1645 static struct pci_device_id qla4xxx_pci_tbl[] = {
1646         {
1647                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1648                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4010,
1649                 .subvendor      = PCI_ANY_ID,
1650                 .subdevice      = PCI_ANY_ID,
1651         },
1652         {
1653                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1654                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4022,
1655                 .subvendor      = PCI_ANY_ID,
1656                 .subdevice      = PCI_ANY_ID,
1657         },
1658         {
1659                 .vendor         = PCI_VENDOR_ID_QLOGIC,
1660                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4032,
1661                 .subvendor      = PCI_ANY_ID,
1662                 .subdevice      = PCI_ANY_ID,
1663         },
1664         {0, 0},
1665 };
1666 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1667
1668 static struct pci_driver qla4xxx_pci_driver = {
1669         .name           = DRIVER_NAME,
1670         .id_table       = qla4xxx_pci_tbl,
1671         .probe          = qla4xxx_probe_adapter,
1672         .remove         = qla4xxx_remove_adapter,
1673 };
1674
1675 static int __init qla4xxx_module_init(void)
1676 {
1677         int ret;
1678
1679         /* Allocate cache for SRBs. */
1680         srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1681                                        SLAB_HWCACHE_ALIGN, NULL);
1682         if (srb_cachep == NULL) {
1683                 printk(KERN_ERR
1684                        "%s: Unable to allocate SRB cache..."
1685                        "Failing load!\n", DRIVER_NAME);
1686                 ret = -ENOMEM;
1687                 goto no_srp_cache;
1688         }
1689
1690         /* Derive version string. */
1691         strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1692         if (ql4xextended_error_logging)
1693                 strcat(qla4xxx_version_str, "-debug");
1694
1695         qla4xxx_scsi_transport =
1696                 iscsi_register_transport(&qla4xxx_iscsi_transport);
1697         if (!qla4xxx_scsi_transport){
1698                 ret = -ENODEV;
1699                 goto release_srb_cache;
1700         }
1701
1702         ret = pci_register_driver(&qla4xxx_pci_driver);
1703         if (ret)
1704                 goto unregister_transport;
1705
1706         printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1707         return 0;
1708
1709 unregister_transport:
1710         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1711 release_srb_cache:
1712         kmem_cache_destroy(srb_cachep);
1713 no_srp_cache:
1714         return ret;
1715 }
1716
1717 static void __exit qla4xxx_module_exit(void)
1718 {
1719         ql4_mod_unload = 1;
1720         pci_unregister_driver(&qla4xxx_pci_driver);
1721         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1722         kmem_cache_destroy(srb_cachep);
1723 }
1724
1725 module_init(qla4xxx_module_init);
1726 module_exit(qla4xxx_module_exit);
1727
1728 MODULE_AUTHOR("QLogic Corporation");
1729 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1730 MODULE_LICENSE("GPL");
1731 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);