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