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 #include <linux/slab.h>
   9
  10 #include <scsi/scsi_tcq.h>
  11 #include <scsi/scsicam.h>
  12
  13 #include "ql4_def.h"
  14 #include "ql4_version.h"
  15 #include "ql4_glbl.h"
  16 #include "ql4_dbg.h"
  17 #include "ql4_inline.h"
  18
  19 /*
  20  * Driver version
  21  */
  22 static char qla4xxx_version_str[40];
  23
  24 /*
  25  * SRB allocation cache
  26  */
  27 static struct kmem_cache *srb_cachep;
  28
  29 /*
  30  * Module parameter information and variables
  31  */
  32 int ql4xdiscoverywait = 60;
  33 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IWUSR);
  34 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
  35
  36 int ql4xdontresethba = 0;
  37 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);
  38 MODULE_PARM_DESC(ql4xdontresethba,
  39                 "Don't reset the HBA for driver recovery \n"
  40                 " 0 - It will reset HBA (Default)\n"
  41                 " 1 - It will NOT reset HBA");
  42
  43 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
  44 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);
  45 MODULE_PARM_DESC(ql4xextended_error_logging,
  46                  "Option to enable extended error logging, "
  47                  "Default is 0 - no logging, 1 - debug logging");
  48
  49 int ql4xenablemsix = 1;
  50 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
  51 MODULE_PARM_DESC(ql4xenablemsix,
  52                 "Set to enable MSI or MSI-X interrupt mechanism.\n"
  53                 " 0 = enable INTx interrupt mechanism.\n"
  54                 " 1 = enable MSI-X interrupt mechanism (Default).\n"
  55                 " 2 = enable MSI interrupt mechanism.");
  56
  57 #define QL4_DEF_QDEPTH 32
  58
  59 /*
  60  * SCSI host template entry points
  61  */
  62 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
  63
  64 /*
  65  * iSCSI template entry points
  66  */
  67 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
  68                              enum iscsi_tgt_dscvr type, uint32_t enable,
  69                              struct sockaddr *dst_addr);
  70 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
  71                                   enum iscsi_param param, char *buf);
  72 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
  73                                   enum iscsi_param param, char *buf);
  74 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
  75                                   enum iscsi_host_param param, char *buf);
  76 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
  77 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
  78
  79 /*
  80  * SCSI host template entry points
  81  */
  82 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
  83                                 void (*done) (struct scsi_cmnd *));
  84 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
  85 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
  86 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
  87 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
  88 static int qla4xxx_slave_alloc(struct scsi_device *device);
  89 static int qla4xxx_slave_configure(struct scsi_device *device);
  90 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
  91 static void qla4xxx_scan_start(struct Scsi_Host *shost);
  92
  93 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
  94     QLA82XX_LEGACY_INTR_CONFIG;
  95
  96 static struct scsi_host_template qla4xxx_driver_template = {
  97         .module                 = THIS_MODULE,
  98         .name                   = DRIVER_NAME,
  99         .proc_name              = DRIVER_NAME,
 100         .queuecommand           = qla4xxx_queuecommand,
 101
 102         .eh_abort_handler       = qla4xxx_eh_abort,
 103         .eh_device_reset_handler = qla4xxx_eh_device_reset,
 104         .eh_target_reset_handler = qla4xxx_eh_target_reset,
 105         .eh_host_reset_handler  = qla4xxx_eh_host_reset,
 106         .eh_timed_out           = qla4xxx_eh_cmd_timed_out,
 107
 108         .slave_configure        = qla4xxx_slave_configure,
 109         .slave_alloc            = qla4xxx_slave_alloc,
 110         .slave_destroy          = qla4xxx_slave_destroy,
 111
 112         .scan_finished          = iscsi_scan_finished,
 113         .scan_start             = qla4xxx_scan_start,
 114
 115         .this_id                = -1,
 116         .cmd_per_lun            = 3,
 117         .use_clustering         = ENABLE_CLUSTERING,
 118         .sg_tablesize           = SG_ALL,
 119
 120         .max_sectors            = 0xFFFF,
 121 };
 122
 123 static struct iscsi_transport qla4xxx_iscsi_transport = {
 124         .owner                  = THIS_MODULE,
 125         .name                   = DRIVER_NAME,
 126         .caps                   = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
 127                                   CAP_DATA_PATH_OFFLOAD,
 128         .param_mask             = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
 129                                   ISCSI_TARGET_NAME | ISCSI_TPGT |
 130                                   ISCSI_TARGET_ALIAS,
 131         .host_param_mask        = ISCSI_HOST_HWADDRESS |
 132                                   ISCSI_HOST_IPADDRESS |
 133                                   ISCSI_HOST_INITIATOR_NAME,
 134         .tgt_dscvr              = qla4xxx_tgt_dscvr,
 135         .get_conn_param         = qla4xxx_conn_get_param,
 136         .get_session_param      = qla4xxx_sess_get_param,
 137         .get_host_param         = qla4xxx_host_get_param,
 138         .session_recovery_timedout = qla4xxx_recovery_timedout,
 139 };
 140
 141 static struct scsi_transport_template *qla4xxx_scsi_transport;
 142
 143 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
 144 {
 145         struct iscsi_cls_session *session;
 146         struct ddb_entry *ddb_entry;
 147
 148         session = starget_to_session(scsi_target(sc->device));
 149         ddb_entry = session->dd_data;
 150
 151         /* if we are not logged in then the LLD is going to clean up the cmd */
 152         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
 153                 return BLK_EH_RESET_TIMER;
 154         else
 155                 return BLK_EH_NOT_HANDLED;
 156 }
 157
 158 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
 159 {
 160         struct ddb_entry *ddb_entry = session->dd_data;
 161         struct scsi_qla_host *ha = ddb_entry->ha;
 162
 163         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 164                 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 165
 166                 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout "
 167                               "of (%d) secs exhausted, marking device DEAD.\n",
 168                               ha->host_no, __func__, ddb_entry->fw_ddb_index,
 169                               QL4_SESS_RECOVERY_TMO));
 170         }
 171 }
 172
 173 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
 174                                   enum iscsi_host_param param, char *buf)
 175 {
 176         struct scsi_qla_host *ha = to_qla_host(shost);
 177         int len;
 178
 179         switch (param) {
 180         case ISCSI_HOST_PARAM_HWADDRESS:
 181                 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
 182                 break;
 183         case ISCSI_HOST_PARAM_IPADDRESS:
 184                 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
 185                               ha->ip_address[1], ha->ip_address[2],
 186                               ha->ip_address[3]);
 187                 break;
 188         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 189                 len = sprintf(buf, "%s\n", ha->name_string);
 190                 break;
 191         default:
 192                 return -ENOSYS;
 193         }
 194
 195         return len;
 196 }
 197
 198 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
 199                                   enum iscsi_param param, char *buf)
 200 {
 201         struct ddb_entry *ddb_entry = sess->dd_data;
 202         int len;
 203
 204         switch (param) {
 205         case ISCSI_PARAM_TARGET_NAME:
 206                 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
 207                                ddb_entry->iscsi_name);
 208                 break;
 209         case ISCSI_PARAM_TPGT:
 210                 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
 211                 break;
 212         case ISCSI_PARAM_TARGET_ALIAS:
 213                 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
 214                     ddb_entry->iscsi_alias);
 215                 break;
 216         default:
 217                 return -ENOSYS;
 218         }
 219
 220         return len;
 221 }
 222
 223 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
 224                                   enum iscsi_param param, char *buf)
 225 {
 226         struct iscsi_cls_session *session;
 227         struct ddb_entry *ddb_entry;
 228         int len;
 229
 230         session = iscsi_dev_to_session(conn->dev.parent);
 231         ddb_entry = session->dd_data;
 232
 233         switch (param) {
 234         case ISCSI_PARAM_CONN_PORT:
 235                 len = sprintf(buf, "%hu\n", ddb_entry->port);
 236                 break;
 237         case ISCSI_PARAM_CONN_ADDRESS:
 238                 /* TODO: what are the ipv6 bits */
 239                 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
 240                 break;
 241         default:
 242                 return -ENOSYS;
 243         }
 244
 245         return len;
 246 }
 247
 248 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
 249                              enum iscsi_tgt_dscvr type, uint32_t enable,
 250                              struct sockaddr *dst_addr)
 251 {
 252         struct scsi_qla_host *ha;
 253         struct sockaddr_in *addr;
 254         struct sockaddr_in6 *addr6;
 255         int ret = 0;
 256
 257         ha = (struct scsi_qla_host *) shost->hostdata;
 258
 259         switch (type) {
 260         case ISCSI_TGT_DSCVR_SEND_TARGETS:
 261                 if (dst_addr->sa_family == AF_INET) {
 262                         addr = (struct sockaddr_in *)dst_addr;
 263                         if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
 264                                               addr->sin_port) != QLA_SUCCESS)
 265                                 ret = -EIO;
 266                 } else if (dst_addr->sa_family == AF_INET6) {
 267                         /*
 268                          * TODO: fix qla4xxx_send_tgts
 269                          */
 270                         addr6 = (struct sockaddr_in6 *)dst_addr;
 271                         if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
 272                                               addr6->sin6_port) != QLA_SUCCESS)
 273                                 ret = -EIO;
 274                 } else
 275                         ret = -ENOSYS;
 276                 break;
 277         default:
 278                 ret = -ENOSYS;
 279         }
 280         return ret;
 281 }
 282
 283 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
 284 {
 285         if (!ddb_entry->sess)
 286                 return;
 287
 288         if (ddb_entry->conn) {
 289                 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
 290                 iscsi_remove_session(ddb_entry->sess);
 291         }
 292         iscsi_free_session(ddb_entry->sess);
 293 }
 294
 295 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
 296 {
 297         int err;
 298
 299         ddb_entry->sess->recovery_tmo = QL4_SESS_RECOVERY_TMO;
 300
 301         err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
 302         if (err) {
 303                 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
 304                 return err;
 305         }
 306
 307         ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
 308         if (!ddb_entry->conn) {
 309                 iscsi_remove_session(ddb_entry->sess);
 310                 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
 311                 return -ENOMEM;
 312         }
 313
 314         /* finally ready to go */
 315         iscsi_unblock_session(ddb_entry->sess);
 316         return 0;
 317 }
 318
 319 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
 320 {
 321         struct ddb_entry *ddb_entry;
 322         struct iscsi_cls_session *sess;
 323
 324         sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
 325                                    sizeof(struct ddb_entry));
 326         if (!sess)
 327                 return NULL;
 328
 329         ddb_entry = sess->dd_data;
 330         memset(ddb_entry, 0, sizeof(*ddb_entry));
 331         ddb_entry->ha = ha;
 332         ddb_entry->sess = sess;
 333         return ddb_entry;
 334 }
 335
 336 static void qla4xxx_scan_start(struct Scsi_Host *shost)
 337 {
 338         struct scsi_qla_host *ha = shost_priv(shost);
 339         struct ddb_entry *ddb_entry, *ddbtemp;
 340
 341         /* finish setup of sessions that were already setup in firmware */
 342         list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
 343                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
 344                         qla4xxx_add_sess(ddb_entry);
 345         }
 346 }
 347
 348 /*
 349  * Timer routines
 350  */
 351
 352 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
 353                                 unsigned long interval)
 354 {
 355         DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
 356                      __func__, ha->host->host_no));
 357         init_timer(&ha->timer);
 358         ha->timer.expires = jiffies + interval * HZ;
 359         ha->timer.data = (unsigned long)ha;
 360         ha->timer.function = (void (*)(unsigned long))func;
 361         add_timer(&ha->timer);
 362         ha->timer_active = 1;
 363 }
 364
 365 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
 366 {
 367         del_timer_sync(&ha->timer);
 368         ha->timer_active = 0;
 369 }
 370
 371 /***
 372  * qla4xxx_mark_device_missing - mark a device as missing.
 373  * @ha: Pointer to host adapter structure.
 374  * @ddb_entry: Pointer to device database entry
 375  *
 376  * This routine marks a device missing and close connection.
 377  **/
 378 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
 379                                  struct ddb_entry *ddb_entry)
 380 {
 381         if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
 382                 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
 383                 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
 384                     ha->host_no, ddb_entry->fw_ddb_index));
 385         } else
 386                 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
 387                     ddb_entry->fw_ddb_index))
 388
 389         iscsi_block_session(ddb_entry->sess);
 390         iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
 391 }
 392
 393 /**
 394  * qla4xxx_mark_all_devices_missing - mark all devices as missing.
 395  * @ha: Pointer to host adapter structure.
 396  *
 397  * This routine marks a device missing and resets the relogin retry count.
 398  **/
 399 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
 400 {
 401         struct ddb_entry *ddb_entry, *ddbtemp;
 402         list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
 403                 qla4xxx_mark_device_missing(ha, ddb_entry);
 404         }
 405 }
 406
 407 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
 408                                        struct ddb_entry *ddb_entry,
 409                                        struct scsi_cmnd *cmd,
 410                                        void (*done)(struct scsi_cmnd *))
 411 {
 412         struct srb *srb;
 413
 414         srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
 415         if (!srb)
 416                 return srb;
 417
 418         kref_init(&srb->srb_ref);
 419         srb->ha = ha;
 420         srb->ddb = ddb_entry;
 421         srb->cmd = cmd;
 422         srb->flags = 0;
 423         CMD_SP(cmd) = (void *)srb;
 424         cmd->scsi_done = done;
 425
 426         return srb;
 427 }
 428
 429 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
 430 {
 431         struct scsi_cmnd *cmd = srb->cmd;
 432
 433         if (srb->flags & SRB_DMA_VALID) {
 434                 scsi_dma_unmap(cmd);
 435                 srb->flags &= ~SRB_DMA_VALID;
 436         }
 437         CMD_SP(cmd) = NULL;
 438 }
 439
 440 void qla4xxx_srb_compl(struct kref *ref)
 441 {
 442         struct srb *srb = container_of(ref, struct srb, srb_ref);
 443         struct scsi_cmnd *cmd = srb->cmd;
 444         struct scsi_qla_host *ha = srb->ha;
 445
 446         qla4xxx_srb_free_dma(ha, srb);
 447
 448         mempool_free(srb, ha->srb_mempool);
 449
 450         cmd->scsi_done(cmd);
 451 }
 452
 453 /**
 454  * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
 455  * @cmd: Pointer to Linux's SCSI command structure
 456  * @done_fn: Function that the driver calls to notify the SCSI mid-layer
 457  *      that the command has been processed.
 458  *
 459  * Remarks:
 460  * This routine is invoked by Linux to send a SCSI command to the driver.
 461  * The mid-level driver tries to ensure that queuecommand never gets
 462  * invoked concurrently with itself or the interrupt handler (although
 463  * the interrupt handler may call this routine as part of request-
 464  * completion handling).   Unfortunely, it sometimes calls the scheduler
 465  * in interrupt context which is a big NO! NO!.
 466  **/
 467 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
 468                                 void (*done)(struct scsi_cmnd *))
 469 {
 470         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
 471         struct ddb_entry *ddb_entry = cmd->device->hostdata;
 472         struct iscsi_cls_session *sess = ddb_entry->sess;
 473         struct srb *srb;
 474         int rval;
 475
 476         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
 477                 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
 478                         cmd->result = DID_NO_CONNECT << 16;
 479                 else
 480                         cmd->result = DID_REQUEUE << 16;
 481                 goto qc_fail_command;
 482         }
 483
 484         if (!sess) {
 485                 cmd->result = DID_IMM_RETRY << 16;
 486                 goto qc_fail_command;
 487         }
 488
 489         rval = iscsi_session_chkready(sess);
 490         if (rval) {
 491                 cmd->result = rval;
 492                 goto qc_fail_command;
 493         }
 494
 495         if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 496                 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
 497                         cmd->result = DID_NO_CONNECT << 16;
 498                         goto qc_fail_command;
 499                 }
 500                 return SCSI_MLQUEUE_TARGET_BUSY;
 501         }
 502
 503         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 504             test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
 505             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 506             test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
 507             test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
 508             !test_bit(AF_ONLINE, &ha->flags) ||
 509             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
 510                 goto qc_host_busy;
 511
 512         spin_unlock_irq(ha->host->host_lock);
 513
 514         srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
 515         if (!srb)
 516                 goto qc_host_busy_lock;
 517
 518         rval = qla4xxx_send_command_to_isp(ha, srb);
 519         if (rval != QLA_SUCCESS)
 520                 goto qc_host_busy_free_sp;
 521
 522         spin_lock_irq(ha->host->host_lock);
 523         return 0;
 524
 525 qc_host_busy_free_sp:
 526         qla4xxx_srb_free_dma(ha, srb);
 527         mempool_free(srb, ha->srb_mempool);
 528
 529 qc_host_busy_lock:
 530         spin_lock_irq(ha->host->host_lock);
 531
 532 qc_host_busy:
 533         return SCSI_MLQUEUE_HOST_BUSY;
 534
 535 qc_fail_command:
 536         done(cmd);
 537
 538         return 0;
 539 }
 540
 541 /**
 542  * qla4xxx_mem_free - frees memory allocated to adapter
 543  * @ha: Pointer to host adapter structure.
 544  *
 545  * Frees memory previously allocated by qla4xxx_mem_alloc
 546  **/
 547 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
 548 {
 549         if (ha->queues)
 550                 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
 551                                   ha->queues_dma);
 552
 553         ha->queues_len = 0;
 554         ha->queues = NULL;
 555         ha->queues_dma = 0;
 556         ha->request_ring = NULL;
 557         ha->request_dma = 0;
 558         ha->response_ring = NULL;
 559         ha->response_dma = 0;
 560         ha->shadow_regs = NULL;
 561         ha->shadow_regs_dma = 0;
 562
 563         /* Free srb pool. */
 564         if (ha->srb_mempool)
 565                 mempool_destroy(ha->srb_mempool);
 566
 567         ha->srb_mempool = NULL;
 568
 569         /* release io space registers  */
 570         if (is_qla8022(ha)) {
 571                 if (ha->nx_pcibase)
 572                         iounmap(
 573                             (struct device_reg_82xx __iomem *)ha->nx_pcibase);
 574         } else if (ha->reg)
 575                 iounmap(ha->reg);
 576         pci_release_regions(ha->pdev);
 577 }
 578
 579 /**
 580  * qla4xxx_mem_alloc - allocates memory for use by adapter.
 581  * @ha: Pointer to host adapter structure
 582  *
 583  * Allocates DMA memory for request and response queues. Also allocates memory
 584  * for srbs.
 585  **/
 586 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
 587 {
 588         unsigned long align;
 589
 590         /* Allocate contiguous block of DMA memory for queues. */
 591         ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 592                           (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
 593                           sizeof(struct shadow_regs) +
 594                           MEM_ALIGN_VALUE +
 595                           (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
 596         ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
 597                                         &ha->queues_dma, GFP_KERNEL);
 598         if (ha->queues == NULL) {
 599                 ql4_printk(KERN_WARNING, ha,
 600                     "Memory Allocation failed - queues.\n");
 601
 602                 goto mem_alloc_error_exit;
 603         }
 604         memset(ha->queues, 0, ha->queues_len);
 605
 606         /*
 607          * As per RISC alignment requirements -- the bus-address must be a
 608          * multiple of the request-ring size (in bytes).
 609          */
 610         align = 0;
 611         if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
 612                 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
 613                                            (MEM_ALIGN_VALUE - 1));
 614
 615         /* Update request and response queue pointers. */
 616         ha->request_dma = ha->queues_dma + align;
 617         ha->request_ring = (struct queue_entry *) (ha->queues + align);
 618         ha->response_dma = ha->queues_dma + align +
 619                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
 620         ha->response_ring = (struct queue_entry *) (ha->queues + align +
 621                                                     (REQUEST_QUEUE_DEPTH *
 622                                                      QUEUE_SIZE));
 623         ha->shadow_regs_dma = ha->queues_dma + align +
 624                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
 625                 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
 626         ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
 627                                                   (REQUEST_QUEUE_DEPTH *
 628                                                    QUEUE_SIZE) +
 629                                                   (RESPONSE_QUEUE_DEPTH *
 630                                                    QUEUE_SIZE));
 631
 632         /* Allocate memory for srb pool. */
 633         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
 634                                          mempool_free_slab, srb_cachep);
 635         if (ha->srb_mempool == NULL) {
 636                 ql4_printk(KERN_WARNING, ha,
 637                     "Memory Allocation failed - SRB Pool.\n");
 638
 639                 goto mem_alloc_error_exit;
 640         }
 641
 642         return QLA_SUCCESS;
 643
 644 mem_alloc_error_exit:
 645         qla4xxx_mem_free(ha);
 646         return QLA_ERROR;
 647 }
 648
 649 /**
 650  * qla4_8xxx_check_fw_alive  - Check firmware health
 651  * @ha: Pointer to host adapter structure.
 652  *
 653  * Context: Interrupt
 654  **/
 655 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
 656 {
 657         uint32_t fw_heartbeat_counter, halt_status;
 658
 659         fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
 660         /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
 661         if (fw_heartbeat_counter == 0xffffffff) {
 662                 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
 663                     "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
 664                     ha->host_no, __func__));
 665                 return;
 666         }
 667
 668         if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
 669                 ha->seconds_since_last_heartbeat++;
 670                 /* FW not alive after 2 seconds */
 671                 if (ha->seconds_since_last_heartbeat == 2) {
 672                         ha->seconds_since_last_heartbeat = 0;
 673                         halt_status = qla4_8xxx_rd_32(ha,
 674                             QLA82XX_PEG_HALT_STATUS1);
 675
 676                         /* Since we cannot change dev_state in interrupt
 677                          * context, set appropriate DPC flag then wakeup
 678                          * DPC */
 679                         if (halt_status & HALT_STATUS_UNRECOVERABLE)
 680                                 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
 681                         else {
 682                                 printk("scsi%ld: %s: detect abort needed!\n",
 683                                     ha->host_no, __func__);
 684                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 685                         }
 686                         qla4xxx_wake_dpc(ha);
 687                         qla4xxx_mailbox_premature_completion(ha);
 688                 }
 689         } else
 690                 ha->seconds_since_last_heartbeat = 0;
 691
 692         ha->fw_heartbeat_counter = fw_heartbeat_counter;
 693 }
 694
 695 /**
 696  * qla4_8xxx_watchdog - Poll dev state
 697  * @ha: Pointer to host adapter structure.
 698  *
 699  * Context: Interrupt
 700  **/
 701 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
 702 {
 703         uint32_t dev_state;
 704
 705         dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
 706
 707         /* don't poll if reset is going on */
 708         if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags)) {
 709                 if (dev_state == QLA82XX_DEV_NEED_RESET &&
 710                     !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
 711                         printk("scsi%ld: %s: HW State: NEED RESET!\n",
 712                             ha->host_no, __func__);
 713                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
 714                         qla4xxx_wake_dpc(ha);
 715                         qla4xxx_mailbox_premature_completion(ha);
 716                 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
 717                     !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
 718                         printk("scsi%ld: %s: HW State: NEED QUIES!\n",
 719                             ha->host_no, __func__);
 720                         set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
 721                         qla4xxx_wake_dpc(ha);
 722                 } else  {
 723                         /* Check firmware health */
 724                         qla4_8xxx_check_fw_alive(ha);
 725                 }
 726         }
 727 }
 728
 729 /**
 730  * qla4xxx_timer - checks every second for work to do.
 731  * @ha: Pointer to host adapter structure.
 732  **/
 733 static void qla4xxx_timer(struct scsi_qla_host *ha)
 734 {
 735         struct ddb_entry *ddb_entry, *dtemp;
 736         int start_dpc = 0;
 737         uint16_t w;
 738
 739         /* If we are in the middle of AER/EEH processing
 740          * skip any processing and reschedule the timer
 741          */
 742         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
 743                 mod_timer(&ha->timer, jiffies + HZ);
 744                 return;
 745         }
 746
 747         /* Hardware read to trigger an EEH error during mailbox waits. */
 748         if (!pci_channel_offline(ha->pdev))
 749                 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
 750
 751         if (test_bit(AF_HBA_GOING_AWAY, &ha->flags)) {
 752                 DEBUG2(ql4_printk(KERN_INFO, ha, "%s exited. HBA GOING AWAY\n",
 753                     __func__));
 754                 return;
 755         }
 756
 757         if (is_qla8022(ha)) {
 758                 qla4_8xxx_watchdog(ha);
 759         }
 760
 761         /* Search for relogin's to time-out and port down retry. */
 762         list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
 763                 /* Count down time between sending relogins */
 764                 if (adapter_up(ha) &&
 765                     !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
 766                     atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
 767                         if (atomic_read(&ddb_entry->retry_relogin_timer) !=
 768                             INVALID_ENTRY) {
 769                                 if (atomic_read(&ddb_entry->retry_relogin_timer)
 770                                                 == 0) {
 771                                         atomic_set(&ddb_entry->
 772                                                 retry_relogin_timer,
 773                                                 INVALID_ENTRY);
 774                                         set_bit(DPC_RELOGIN_DEVICE,
 775                                                 &ha->dpc_flags);
 776                                         set_bit(DF_RELOGIN, &ddb_entry->flags);
 777                                         DEBUG2(printk("scsi%ld: %s: ddb [%d]"
 778                                                       " login device\n",
 779                                                       ha->host_no, __func__,
 780                                                       ddb_entry->fw_ddb_index));
 781                                 } else
 782                                         atomic_dec(&ddb_entry->
 783                                                         retry_relogin_timer);
 784                         }
 785                 }
 786
 787                 /* Wait for relogin to timeout */
 788                 if (atomic_read(&ddb_entry->relogin_timer) &&
 789                     (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
 790                         /*
 791                          * If the relogin times out and the device is
 792                          * still NOT ONLINE then try and relogin again.
 793                          */
 794                         if (atomic_read(&ddb_entry->state) !=
 795                             DDB_STATE_ONLINE &&
 796                             ddb_entry->fw_ddb_device_state ==
 797                             DDB_DS_SESSION_FAILED) {
 798                                 /* Reset retry relogin timer */
 799                                 atomic_inc(&ddb_entry->relogin_retry_count);
 800                                 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
 801                                               " timed out-retrying"
 802                                               " relogin (%d)\n",
 803                                               ha->host_no,
 804                                               ddb_entry->fw_ddb_index,
 805                                               atomic_read(&ddb_entry->
 806                                                           relogin_retry_count))
 807                                         );
 808                                 start_dpc++;
 809                                 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
 810                                              "initate relogin after"
 811                                              " %d seconds\n",
 812                                              ha->host_no, ddb_entry->bus,
 813                                              ddb_entry->target,
 814                                              ddb_entry->fw_ddb_index,
 815                                              ddb_entry->default_time2wait + 4)
 816                                         );
 817
 818                                 atomic_set(&ddb_entry->retry_relogin_timer,
 819                                            ddb_entry->default_time2wait + 4);
 820                         }
 821                 }
 822         }
 823
 824         if (!is_qla8022(ha)) {
 825                 /* Check for heartbeat interval. */
 826                 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
 827                     ha->heartbeat_interval != 0) {
 828                         ha->seconds_since_last_heartbeat++;
 829                         if (ha->seconds_since_last_heartbeat >
 830                             ha->heartbeat_interval + 2)
 831                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
 832                 }
 833         }
 834
 835         /* Wakeup the dpc routine for this adapter, if needed. */
 836         if ((start_dpc ||
 837              test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
 838              test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
 839              test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
 840              test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
 841              test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
 842              test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
 843              test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
 844              test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
 845              test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
 846              test_bit(DPC_AEN, &ha->dpc_flags)) &&
 847              !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
 848              ha->dpc_thread) {
 849                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
 850                               " - dpc flags = 0x%lx\n",
 851                               ha->host_no, __func__, ha->dpc_flags));
 852                 qla4xxx_wake_dpc(ha);
 853         }
 854
 855         /* Reschedule timer thread to call us back in one second */
 856         mod_timer(&ha->timer, jiffies + HZ);
 857
 858         DEBUG2(ha->seconds_since_last_intr++);
 859 }
 860
 861 /**
 862  * qla4xxx_cmd_wait - waits for all outstanding commands to complete
 863  * @ha: Pointer to host adapter structure.
 864  *
 865  * This routine stalls the driver until all outstanding commands are returned.
 866  * Caller must release the Hardware Lock prior to calling this routine.
 867  **/
 868 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
 869 {
 870         uint32_t index = 0;
 871         unsigned long flags;
 872         struct scsi_cmnd *cmd;
 873
 874         unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
 875
 876         DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
 877             "complete\n", WAIT_CMD_TOV));
 878
 879         while (!time_after_eq(jiffies, wtime)) {
 880                 spin_lock_irqsave(&ha->hardware_lock, flags);
 881                 /* Find a command that hasn't completed. */
 882                 for (index = 0; index < ha->host->can_queue; index++) {
 883                         cmd = scsi_host_find_tag(ha->host, index);
 884                         if (cmd != NULL)
 885                                 break;
 886                 }
 887                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 888
 889                 /* If No Commands are pending, wait is complete */
 890                 if (index == ha->host->can_queue)
 891                         return QLA_SUCCESS;
 892
 893                 msleep(1000);
 894         }
 895         /* If we timed out on waiting for commands to come back
 896          * return ERROR. */
 897         return QLA_ERROR;
 898 }
 899
 900 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
 901 {
 902         uint32_t ctrl_status;
 903         unsigned long flags = 0;
 904
 905         DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
 906
 907         if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
 908                 return QLA_ERROR;
 909
 910         spin_lock_irqsave(&ha->hardware_lock, flags);
 911
 912         /*
 913          * If the SCSI Reset Interrupt bit is set, clear it.
 914          * Otherwise, the Soft Reset won't work.
 915          */
 916         ctrl_status = readw(&ha->reg->ctrl_status);
 917         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
 918                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 919
 920         /* Issue Soft Reset */
 921         writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
 922         readl(&ha->reg->ctrl_status);
 923
 924         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 925         return QLA_SUCCESS;
 926 }
 927
 928 /**
 929  * qla4xxx_soft_reset - performs soft reset.
 930  * @ha: Pointer to host adapter structure.
 931  **/
 932 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
 933 {
 934         uint32_t max_wait_time;
 935         unsigned long flags = 0;
 936         int status;
 937         uint32_t ctrl_status;
 938
 939         status = qla4xxx_hw_reset(ha);
 940         if (status != QLA_SUCCESS)
 941                 return status;
 942
 943         status = QLA_ERROR;
 944         /* Wait until the Network Reset Intr bit is cleared */
 945         max_wait_time = RESET_INTR_TOV;
 946         do {
 947                 spin_lock_irqsave(&ha->hardware_lock, flags);
 948                 ctrl_status = readw(&ha->reg->ctrl_status);
 949                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 950
 951                 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
 952                         break;
 953
 954                 msleep(1000);
 955         } while ((--max_wait_time));
 956
 957         if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
 958                 DEBUG2(printk(KERN_WARNING
 959                               "scsi%ld: Network Reset Intr not cleared by "
 960                               "Network function, clearing it now!\n",
 961                               ha->host_no));
 962                 spin_lock_irqsave(&ha->hardware_lock, flags);
 963                 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
 964                 readl(&ha->reg->ctrl_status);
 965                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 966         }
 967
 968         /* Wait until the firmware tells us the Soft Reset is done */
 969         max_wait_time = SOFT_RESET_TOV;
 970         do {
 971                 spin_lock_irqsave(&ha->hardware_lock, flags);
 972                 ctrl_status = readw(&ha->reg->ctrl_status);
 973                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 974
 975                 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
 976                         status = QLA_SUCCESS;
 977                         break;
 978                 }
 979
 980                 msleep(1000);
 981         } while ((--max_wait_time));
 982
 983         /*
 984          * Also, make sure that the SCSI Reset Interrupt bit has been cleared
 985          * after the soft reset has taken place.
 986          */
 987         spin_lock_irqsave(&ha->hardware_lock, flags);
 988         ctrl_status = readw(&ha->reg->ctrl_status);
 989         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
 990                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
 991                 readl(&ha->reg->ctrl_status);
 992         }
 993         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 994
 995         /* If soft reset fails then most probably the bios on other
 996          * function is also enabled.
 997          * Since the initialization is sequential the other fn
 998          * wont be able to acknowledge the soft reset.
 999          * Issue a force soft reset to workaround this scenario.
1000          */
1001         if (max_wait_time == 0) {
1002                 /* Issue Force Soft Reset */
1003                 spin_lock_irqsave(&ha->hardware_lock, flags);
1004                 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1005                 readl(&ha->reg->ctrl_status);
1006                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1007                 /* Wait until the firmware tells us the Soft Reset is done */
1008                 max_wait_time = SOFT_RESET_TOV;
1009                 do {
1010                         spin_lock_irqsave(&ha->hardware_lock, flags);
1011                         ctrl_status = readw(&ha->reg->ctrl_status);
1012                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1013
1014                         if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1015                                 status = QLA_SUCCESS;
1016                                 break;
1017                         }
1018
1019                         msleep(1000);
1020                 } while ((--max_wait_time));
1021         }
1022
1023         return status;
1024 }
1025
1026 /**
1027  * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1028  * @ha: Pointer to host adapter structure.
1029  * @res: returned scsi status
1030  *
1031  * This routine is called just prior to a HARD RESET to return all
1032  * outstanding commands back to the Operating System.
1033  * Caller should make sure that the following locks are released
1034  * before this calling routine: Hardware lock, and io_request_lock.
1035  **/
1036 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1037 {
1038         struct srb *srb;
1039         int i;
1040         unsigned long flags;
1041
1042         spin_lock_irqsave(&ha->hardware_lock, flags);
1043         for (i = 0; i < ha->host->can_queue; i++) {
1044                 srb = qla4xxx_del_from_active_array(ha, i);
1045                 if (srb != NULL) {
1046                         srb->cmd->result = res;
1047                         kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1048                 }
1049         }
1050         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1051 }
1052
1053 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1054 {
1055         clear_bit(AF_ONLINE, &ha->flags);
1056
1057         /* Disable the board */
1058         ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1059         set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1060
1061         qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1062         qla4xxx_mark_all_devices_missing(ha);
1063         clear_bit(AF_INIT_DONE, &ha->flags);
1064 }
1065
1066 /**
1067  * qla4xxx_recover_adapter - recovers adapter after a fatal error
1068  * @ha: Pointer to host adapter structure.
1069  **/
1070 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1071 {
1072         int status = QLA_ERROR;
1073         uint8_t reset_chip = 0;
1074
1075         /* Stall incoming I/O until we are done */
1076         scsi_block_requests(ha->host);
1077         clear_bit(AF_ONLINE, &ha->flags);
1078
1079         DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1080
1081         set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1082
1083         if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1084                 reset_chip = 1;
1085
1086         /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1087          * do not reset adapter, jump to initialize_adapter */
1088         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1089                 status = QLA_SUCCESS;
1090                 goto recover_ha_init_adapter;
1091         }
1092
1093         /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1094          * from eh_host_reset or ioctl module */
1095         if (is_qla8022(ha) && !reset_chip &&
1096             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1097
1098                 DEBUG2(ql4_printk(KERN_INFO, ha,
1099                     "scsi%ld: %s - Performing stop_firmware...\n",
1100                     ha->host_no, __func__));
1101                 status = ha->isp_ops->reset_firmware(ha);
1102                 if (status == QLA_SUCCESS) {
1103                         if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1104                                 qla4xxx_cmd_wait(ha);
1105                         ha->isp_ops->disable_intrs(ha);
1106                         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1107                         qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1108                 } else {
1109                         /* If the stop_firmware fails then
1110                          * reset the entire chip */
1111                         reset_chip = 1;
1112                         clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1113                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
1114                 }
1115         }
1116
1117         /* Issue full chip reset if recovering from a catastrophic error,
1118          * or if stop_firmware fails for ISP-82xx.
1119          * This is the default case for ISP-4xxx */
1120         if (!is_qla8022(ha) || reset_chip) {
1121                 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1122                         qla4xxx_cmd_wait(ha);
1123                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1124                 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1125                 DEBUG2(ql4_printk(KERN_INFO, ha,
1126                     "scsi%ld: %s - Performing chip reset..\n",
1127                     ha->host_no, __func__));
1128                 status = ha->isp_ops->reset_chip(ha);
1129         }
1130
1131         /* Flush any pending ddb changed AENs */
1132         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1133
1134 recover_ha_init_adapter:
1135         /* Upon successful firmware/chip reset, re-initialize the adapter */
1136         if (status == QLA_SUCCESS) {
1137                 /* For ISP-4xxx, force function 1 to always initialize
1138                  * before function 3 to prevent both funcions from
1139                  * stepping on top of the other */
1140                 if (!is_qla8022(ha) && (ha->mac_index == 3))
1141                         ssleep(6);
1142
1143                 /* NOTE: AF_ONLINE flag set upon successful completion of
1144                  *       qla4xxx_initialize_adapter */
1145                 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1146         }
1147
1148         /* Retry failed adapter initialization, if necessary
1149          * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1150          * case to prevent ping-pong resets between functions */
1151         if (!test_bit(AF_ONLINE, &ha->flags) &&
1152             !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1153                 /* Adapter initialization failed, see if we can retry
1154                  * resetting the ha.
1155                  * Since we don't want to block the DPC for too long
1156                  * with multiple resets in the same thread,
1157                  * utilize DPC to retry */
1158                 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1159                         ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1160                         DEBUG2(printk("scsi%ld: recover adapter - retrying "
1161                                       "(%d) more times\n", ha->host_no,
1162                                       ha->retry_reset_ha_cnt));
1163                         set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1164                         status = QLA_ERROR;
1165                 } else {
1166                         if (ha->retry_reset_ha_cnt > 0) {
1167                                 /* Schedule another Reset HA--DPC will retry */
1168                                 ha->retry_reset_ha_cnt--;
1169                                 DEBUG2(printk("scsi%ld: recover adapter - "
1170                                               "retry remaining %d\n",
1171                                               ha->host_no,
1172                                               ha->retry_reset_ha_cnt));
1173                                 status = QLA_ERROR;
1174                         }
1175
1176                         if (ha->retry_reset_ha_cnt == 0) {
1177                                 /* Recover adapter retries have been exhausted.
1178                                  * Adapter DEAD */
1179                                 DEBUG2(printk("scsi%ld: recover adapter "
1180                                               "failed - board disabled\n",
1181                                               ha->host_no));
1182                                 qla4xxx_dead_adapter_cleanup(ha);
1183                                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1184                                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1185                                 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1186                                           &ha->dpc_flags);
1187                                 status = QLA_ERROR;
1188                         }
1189                 }
1190         } else {
1191                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1192                 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1193                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1194         }
1195
1196         ha->adapter_error_count++;
1197
1198         if (test_bit(AF_ONLINE, &ha->flags))
1199                 ha->isp_ops->enable_intrs(ha);
1200
1201         scsi_unblock_requests(ha->host);
1202
1203         clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1204         DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1205             status == QLA_ERROR ? "FAILED" : "SUCCEDED"));
1206
1207         return status;
1208 }
1209
1210 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1211 {
1212         if (ha->dpc_thread &&
1213             !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1214                 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1215                 queue_work(ha->dpc_thread, &ha->dpc_work);
1216         }
1217 }
1218
1219 /**
1220  * qla4xxx_do_dpc - dpc routine
1221  * @data: in our case pointer to adapter structure
1222  *
1223  * This routine is a task that is schedule by the interrupt handler
1224  * to perform the background processing for interrupts.  We put it
1225  * on a task queue that is consumed whenever the scheduler runs; that's
1226  * so you can do anything (i.e. put the process to sleep etc).  In fact,
1227  * the mid-level tries to sleep when it reaches the driver threshold
1228  * "host->can_queue". This can cause a panic if we were in our interrupt code.
1229  **/
1230 static void qla4xxx_do_dpc(struct work_struct *work)
1231 {
1232         struct scsi_qla_host *ha =
1233                 container_of(work, struct scsi_qla_host, dpc_work);
1234         struct ddb_entry *ddb_entry, *dtemp;
1235         int status = QLA_ERROR;
1236
1237         DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1238             "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1239             ha->host_no, __func__, ha->flags, ha->dpc_flags))
1240
1241         /* Initialization not yet finished. Don't do anything yet. */
1242         if (!test_bit(AF_INIT_DONE, &ha->flags))
1243                 goto do_dpc_exit;
1244
1245         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1246                 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1247                     ha->host_no, __func__, ha->flags));
1248                 goto do_dpc_exit;
1249         }
1250
1251         /* HBA is in the process of being permanently disabled.
1252          * Don't process anything */
1253         if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1254                 return;
1255
1256         if (is_qla8022(ha)) {
1257                 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1258                         qla4_8xxx_idc_lock(ha);
1259                         qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1260                             QLA82XX_DEV_FAILED);
1261                         qla4_8xxx_idc_unlock(ha);
1262                         ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1263                         qla4_8xxx_device_state_handler(ha);
1264                 }
1265                 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1266                         qla4_8xxx_need_qsnt_handler(ha);
1267                 }
1268         }
1269
1270         if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1271             (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1272             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1273             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1274                 if (ql4xdontresethba) {
1275                         DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1276                             ha->host_no, __func__));
1277                         clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1278                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1279                         clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1280                         goto dpc_post_reset_ha;
1281                 }
1282                 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1283                     test_bit(DPC_RESET_HA, &ha->dpc_flags))
1284                         qla4xxx_recover_adapter(ha);
1285
1286                 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1287                         uint8_t wait_time = RESET_INTR_TOV;
1288
1289                         while ((readw(&ha->reg->ctrl_status) &
1290                                 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1291                                 if (--wait_time == 0)
1292                                         break;
1293                                 msleep(1000);
1294                         }
1295                         if (wait_time == 0)
1296                                 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1297                                               "bit not cleared-- resetting\n",
1298                                               ha->host_no, __func__));
1299                         qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1300                         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1301                                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1302                                 status = qla4xxx_recover_adapter(ha);
1303                         }
1304                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1305                         if (status == QLA_SUCCESS)
1306                                 ha->isp_ops->enable_intrs(ha);
1307                 }
1308         }
1309
1310 dpc_post_reset_ha:
1311         /* ---- process AEN? --- */
1312         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1313                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1314
1315         /* ---- Get DHCP IP Address? --- */
1316         if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1317                 qla4xxx_get_dhcp_ip_address(ha);
1318
1319         /* ---- link change? --- */
1320         if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1321                 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1322                         /* ---- link down? --- */
1323                         list_for_each_entry_safe(ddb_entry, dtemp,
1324                                                  &ha->ddb_list, list) {
1325                                 if (atomic_read(&ddb_entry->state) ==
1326                                                 DDB_STATE_ONLINE)
1327                                         qla4xxx_mark_device_missing(ha,
1328                                                         ddb_entry);
1329                         }
1330                 } else {
1331                         /* ---- link up? --- *
1332                          * F/W will auto login to all devices ONLY ONCE after
1333                          * link up during driver initialization and runtime
1334                          * fatal error recovery.  Therefore, the driver must
1335                          * manually relogin to devices when recovering from
1336                          * connection failures, logouts, expired KATO, etc. */
1337
1338                         list_for_each_entry_safe(ddb_entry, dtemp,
1339                                                         &ha->ddb_list, list) {
1340                                 if ((atomic_read(&ddb_entry->state) ==
1341                                                  DDB_STATE_MISSING) ||
1342                                     (atomic_read(&ddb_entry->state) ==
1343                                                  DDB_STATE_DEAD)) {
1344                                         if (ddb_entry->fw_ddb_device_state ==
1345                                             DDB_DS_SESSION_ACTIVE) {
1346                                                 atomic_set(&ddb_entry->state,
1347                                                            DDB_STATE_ONLINE);
1348                                                 ql4_printk(KERN_INFO, ha,
1349                                                     "scsi%ld: %s: ddb[%d]"
1350                                                     " marked ONLINE\n",
1351                                                     ha->host_no, __func__,
1352                                                     ddb_entry->fw_ddb_index);
1353
1354                                                 iscsi_unblock_session(
1355                                                     ddb_entry->sess);
1356                                         } else
1357                                                 qla4xxx_relogin_device(
1358                                                     ha, ddb_entry);
1359                                 }
1360
1361                         }
1362                 }
1363         }
1364
1365         /* ---- relogin device? --- */
1366         if (adapter_up(ha) &&
1367             test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1368                 list_for_each_entry_safe(ddb_entry, dtemp,
1369                                          &ha->ddb_list, list) {
1370                         if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1371                             atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1372                                 qla4xxx_relogin_device(ha, ddb_entry);
1373
1374                         /*
1375                          * If mbx cmd times out there is no point
1376                          * in continuing further.
1377                          * With large no of targets this can hang
1378                          * the system.
1379                          */
1380                         if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1381                                 printk(KERN_WARNING "scsi%ld: %s: "
1382                                        "need to reset hba\n",
1383                                        ha->host_no, __func__);
1384                                 break;
1385                         }
1386                 }
1387         }
1388
1389 do_dpc_exit:
1390         clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1391 }
1392
1393 /**
1394  * qla4xxx_free_adapter - release the adapter
1395  * @ha: pointer to adapter structure
1396  **/
1397 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1398 {
1399
1400         if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1401                 /* Turn-off interrupts on the card. */
1402                 ha->isp_ops->disable_intrs(ha);
1403         }
1404
1405         /* Remove timer thread, if present */
1406         if (ha->timer_active)
1407                 qla4xxx_stop_timer(ha);
1408
1409         /* Kill the kernel thread for this host */
1410         if (ha->dpc_thread)
1411                 destroy_workqueue(ha->dpc_thread);
1412
1413         /* Put firmware in known state */
1414         ha->isp_ops->reset_firmware(ha);
1415
1416         if (is_qla8022(ha)) {
1417                 qla4_8xxx_idc_lock(ha);
1418                 qla4_8xxx_clear_drv_active(ha);
1419                 qla4_8xxx_idc_unlock(ha);
1420         }
1421
1422         /* Detach interrupts */
1423         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1424                 qla4xxx_free_irqs(ha);
1425
1426         /* free extra memory */
1427         qla4xxx_mem_free(ha);
1428 }
1429
1430 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1431 {
1432         int status = 0;
1433         uint8_t revision_id;
1434         unsigned long mem_base, mem_len, db_base, db_len;
1435         struct pci_dev *pdev = ha->pdev;
1436
1437         status = pci_request_regions(pdev, DRIVER_NAME);
1438         if (status) {
1439                 printk(KERN_WARNING
1440                     "scsi(%ld) Failed to reserve PIO regions (%s) "
1441                     "status=%d\n", ha->host_no, pci_name(pdev), status);
1442                 goto iospace_error_exit;
1443         }
1444
1445         pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1446         DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1447             __func__, revision_id));
1448         ha->revision_id = revision_id;
1449
1450         /* remap phys address */
1451         mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1452         mem_len = pci_resource_len(pdev, 0);
1453         DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1454             __func__, mem_base, mem_len));
1455
1456         /* mapping of pcibase pointer */
1457         ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1458         if (!ha->nx_pcibase) {
1459                 printk(KERN_ERR
1460                     "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1461                 pci_release_regions(ha->pdev);
1462                 goto iospace_error_exit;
1463         }
1464
1465         /* Mapping of IO base pointer, door bell read and write pointer */
1466
1467         /* mapping of IO base pointer */
1468         ha->qla4_8xxx_reg =
1469             (struct device_reg_82xx  __iomem *)((uint8_t *)ha->nx_pcibase +
1470             0xbc000 + (ha->pdev->devfn << 11));
1471
1472         db_base = pci_resource_start(pdev, 4);  /* doorbell is on bar 4 */
1473         db_len = pci_resource_len(pdev, 4);
1474
1475         ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1476             QLA82XX_CAM_RAM_DB2);
1477
1478         return 0;
1479 iospace_error_exit:
1480         return -ENOMEM;
1481 }
1482
1483 /***
1484  * qla4xxx_iospace_config - maps registers
1485  * @ha: pointer to adapter structure
1486  *
1487  * This routines maps HBA's registers from the pci address space
1488  * into the kernel virtual address space for memory mapped i/o.
1489  **/
1490 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1491 {
1492         unsigned long pio, pio_len, pio_flags;
1493         unsigned long mmio, mmio_len, mmio_flags;
1494
1495         pio = pci_resource_start(ha->pdev, 0);
1496         pio_len = pci_resource_len(ha->pdev, 0);
1497         pio_flags = pci_resource_flags(ha->pdev, 0);
1498         if (pio_flags & IORESOURCE_IO) {
1499                 if (pio_len < MIN_IOBASE_LEN) {
1500                         ql4_printk(KERN_WARNING, ha,
1501                                 "Invalid PCI I/O region size\n");
1502                         pio = 0;
1503                 }
1504         } else {
1505                 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1506                 pio = 0;
1507         }
1508
1509         /* Use MMIO operations for all accesses. */
1510         mmio = pci_resource_start(ha->pdev, 1);
1511         mmio_len = pci_resource_len(ha->pdev, 1);
1512         mmio_flags = pci_resource_flags(ha->pdev, 1);
1513
1514         if (!(mmio_flags & IORESOURCE_MEM)) {
1515                 ql4_printk(KERN_ERR, ha,
1516                     "region #0 not an MMIO resource, aborting\n");
1517
1518                 goto iospace_error_exit;
1519         }
1520
1521         if (mmio_len < MIN_IOBASE_LEN) {
1522                 ql4_printk(KERN_ERR, ha,
1523                     "Invalid PCI mem region size, aborting\n");
1524                 goto iospace_error_exit;
1525         }
1526
1527         if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1528                 ql4_printk(KERN_WARNING, ha,
1529                     "Failed to reserve PIO/MMIO regions\n");
1530
1531                 goto iospace_error_exit;
1532         }
1533
1534         ha->pio_address = pio;
1535         ha->pio_length = pio_len;
1536         ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1537         if (!ha->reg) {
1538                 ql4_printk(KERN_ERR, ha,
1539                     "cannot remap MMIO, aborting\n");
1540
1541                 goto iospace_error_exit;
1542         }
1543
1544         return 0;
1545
1546 iospace_error_exit:
1547         return -ENOMEM;
1548 }
1549
1550 static struct isp_operations qla4xxx_isp_ops = {
1551         .iospace_config         = qla4xxx_iospace_config,
1552         .pci_config             = qla4xxx_pci_config,
1553         .disable_intrs          = qla4xxx_disable_intrs,
1554         .enable_intrs           = qla4xxx_enable_intrs,
1555         .start_firmware         = qla4xxx_start_firmware,
1556         .intr_handler           = qla4xxx_intr_handler,
1557         .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1558         .reset_chip             = qla4xxx_soft_reset,
1559         .reset_firmware         = qla4xxx_hw_reset,
1560         .queue_iocb             = qla4xxx_queue_iocb,
1561         .complete_iocb          = qla4xxx_complete_iocb,
1562         .rd_shdw_req_q_out      = qla4xxx_rd_shdw_req_q_out,
1563         .rd_shdw_rsp_q_in       = qla4xxx_rd_shdw_rsp_q_in,
1564         .get_sys_info           = qla4xxx_get_sys_info,
1565 };
1566
1567 static struct isp_operations qla4_8xxx_isp_ops = {
1568         .iospace_config         = qla4_8xxx_iospace_config,
1569         .pci_config             = qla4_8xxx_pci_config,
1570         .disable_intrs          = qla4_8xxx_disable_intrs,
1571         .enable_intrs           = qla4_8xxx_enable_intrs,
1572         .start_firmware         = qla4_8xxx_load_risc,
1573         .intr_handler           = qla4_8xxx_intr_handler,
1574         .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1575         .reset_chip             = qla4_8xxx_isp_reset,
1576         .reset_firmware         = qla4_8xxx_stop_firmware,
1577         .queue_iocb             = qla4_8xxx_queue_iocb,
1578         .complete_iocb          = qla4_8xxx_complete_iocb,
1579         .rd_shdw_req_q_out      = qla4_8xxx_rd_shdw_req_q_out,
1580         .rd_shdw_rsp_q_in       = qla4_8xxx_rd_shdw_rsp_q_in,
1581         .get_sys_info           = qla4_8xxx_get_sys_info,
1582 };
1583
1584 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1585 {
1586         return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1587 }
1588
1589 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1590 {
1591         return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1592 }
1593
1594 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1595 {
1596         return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1597 }
1598
1599 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1600 {
1601         return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1602 }
1603
1604 /**
1605  * qla4xxx_probe_adapter - callback function to probe HBA
1606  * @pdev: pointer to pci_dev structure
1607  * @pci_device_id: pointer to pci_device entry
1608  *
1609  * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1610  * It returns zero if successful. It also initializes all data necessary for
1611  * the driver.
1612  **/
1613 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1614                                            const struct pci_device_id *ent)
1615 {
1616         int ret = -ENODEV, status;
1617         struct Scsi_Host *host;
1618         struct scsi_qla_host *ha;
1619         uint8_t init_retry_count = 0;
1620         char buf[34];
1621         struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1622
1623         if (pci_enable_device(pdev))
1624                 return -1;
1625
1626         host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1627         if (host == NULL) {
1628                 printk(KERN_WARNING
1629                        "qla4xxx: Couldn't allocate host from scsi layer!\n");
1630                 goto probe_disable_device;
1631         }
1632
1633         /* Clear our data area */
1634         ha = (struct scsi_qla_host *) host->hostdata;
1635         memset(ha, 0, sizeof(*ha));
1636
1637         /* Save the information from PCI BIOS.  */
1638         ha->pdev = pdev;
1639         ha->host = host;
1640         ha->host_no = host->host_no;
1641
1642         pci_enable_pcie_error_reporting(pdev);
1643
1644         /* Setup Runtime configurable options */
1645         if (is_qla8022(ha)) {
1646                 ha->isp_ops = &qla4_8xxx_isp_ops;
1647                 rwlock_init(&ha->hw_lock);
1648                 ha->qdr_sn_window = -1;
1649                 ha->ddr_mn_window = -1;
1650                 ha->curr_window = 255;
1651                 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1652                 nx_legacy_intr = &legacy_intr[ha->func_num];
1653                 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1654                 ha->nx_legacy_intr.tgt_status_reg =
1655                         nx_legacy_intr->tgt_status_reg;
1656                 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1657                 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1658         } else {
1659                 ha->isp_ops = &qla4xxx_isp_ops;
1660         }
1661
1662         /* Set EEH reset type to fundamental if required by hba */
1663         if (is_qla8022(ha))
1664                 pdev->needs_freset = 1;
1665
1666         /* Configure PCI I/O space. */
1667         ret = ha->isp_ops->iospace_config(ha);
1668         if (ret)
1669                 goto probe_failed_ioconfig;
1670
1671         ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1672                    pdev->device, pdev->irq, ha->reg);
1673
1674         qla4xxx_config_dma_addressing(ha);
1675
1676         /* Initialize lists and spinlocks. */
1677         INIT_LIST_HEAD(&ha->ddb_list);
1678         INIT_LIST_HEAD(&ha->free_srb_q);
1679
1680         mutex_init(&ha->mbox_sem);
1681         init_completion(&ha->mbx_intr_comp);
1682
1683         spin_lock_init(&ha->hardware_lock);
1684
1685         /* Allocate dma buffers */
1686         if (qla4xxx_mem_alloc(ha)) {
1687                 ql4_printk(KERN_WARNING, ha,
1688                     "[ERROR] Failed to allocate memory for adapter\n");
1689
1690                 ret = -ENOMEM;
1691                 goto probe_failed;
1692         }
1693
1694         if (is_qla8022(ha))
1695                 (void) qla4_8xxx_get_flash_info(ha);
1696
1697         /*
1698          * Initialize the Host adapter request/response queues and
1699          * firmware
1700          * NOTE: interrupts enabled upon successful completion
1701          */
1702         status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1703         while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1704             init_retry_count++ < MAX_INIT_RETRIES) {
1705                 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1706                               "(%d)\n", __func__, init_retry_count));
1707
1708                 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
1709                         continue;
1710
1711                 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1712         }
1713
1714         if (!test_bit(AF_ONLINE, &ha->flags)) {
1715                 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n");
1716
1717                 ret = -ENODEV;
1718                 goto probe_failed;
1719         }
1720
1721         host->cmd_per_lun = 3;
1722         host->max_channel = 0;
1723         host->max_lun = MAX_LUNS - 1;
1724         host->max_id = MAX_TARGETS;
1725         host->max_cmd_len = IOCB_MAX_CDB_LEN;
1726         host->can_queue = MAX_SRBS ;
1727         host->transportt = qla4xxx_scsi_transport;
1728
1729         ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1730         if (ret) {
1731                 ql4_printk(KERN_WARNING, ha,
1732                     "scsi_init_shared_tag_map failed\n");
1733                 goto probe_failed;
1734         }
1735
1736         /* Startup the kernel thread for this host adapter. */
1737         DEBUG2(printk("scsi: %s: Starting kernel thread for "
1738                       "qla4xxx_dpc\n", __func__));
1739         sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1740         ha->dpc_thread = create_singlethread_workqueue(buf);
1741         if (!ha->dpc_thread) {
1742                 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n");
1743                 ret = -ENODEV;
1744                 goto probe_failed;
1745         }
1746         INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1747
1748         /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
1749          * (which is called indirectly by qla4xxx_initialize_adapter),
1750          * so that irqs will be registered after crbinit but before
1751          * mbx_intr_enable.
1752          */
1753         if (!is_qla8022(ha)) {
1754                 ret = qla4xxx_request_irqs(ha);
1755                 if (ret) {
1756                         ql4_printk(KERN_WARNING, ha, "Failed to reserve "
1757                             "interrupt %d already in use.\n", pdev->irq);
1758                         goto probe_failed;
1759                 }
1760         }
1761
1762         pci_save_state(ha->pdev);
1763         ha->isp_ops->enable_intrs(ha);
1764
1765         /* Start timer thread. */
1766         qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1767
1768         set_bit(AF_INIT_DONE, &ha->flags);
1769
1770         pci_set_drvdata(pdev, ha);
1771
1772         ret = scsi_add_host(host, &pdev->dev);
1773         if (ret)
1774                 goto probe_failed;
1775
1776         printk(KERN_INFO
1777                " QLogic iSCSI HBA Driver version: %s\n"
1778                "  QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1779                qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1780                ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1781                ha->patch_number, ha->build_number);
1782         scsi_scan_host(host);
1783         return 0;
1784
1785 probe_failed:
1786         qla4xxx_free_adapter(ha);
1787
1788 probe_failed_ioconfig:
1789         pci_disable_pcie_error_reporting(pdev);
1790         scsi_host_put(ha->host);
1791
1792 probe_disable_device:
1793         pci_disable_device(pdev);
1794
1795         return ret;
1796 }
1797
1798 /**
1799  * qla4xxx_remove_adapter - calback function to remove adapter.
1800  * @pci_dev: PCI device pointer
1801  **/
1802 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1803 {
1804         struct scsi_qla_host *ha;
1805
1806         ha = pci_get_drvdata(pdev);
1807
1808         set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1809
1810         /* remove devs from iscsi_sessions to scsi_devices */
1811         qla4xxx_free_ddb_list(ha);
1812
1813         scsi_remove_host(ha->host);
1814
1815         qla4xxx_free_adapter(ha);
1816
1817         scsi_host_put(ha->host);
1818
1819         pci_disable_pcie_error_reporting(pdev);
1820         pci_disable_device(pdev);
1821         pci_set_drvdata(pdev, NULL);
1822 }
1823
1824 /**
1825  * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1826  * @ha: HA context
1827  *
1828  * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1829  * supported addressing method.
1830  */
1831 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1832 {
1833         int retval;
1834
1835         /* Update our PCI device dma_mask for full 64 bit mask */
1836         if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1837                 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1838                         dev_dbg(&ha->pdev->dev,
1839                                   "Failed to set 64 bit PCI consistent mask; "
1840                                    "using 32 bit.\n");
1841                         retval = pci_set_consistent_dma_mask(ha->pdev,
1842                                                              DMA_BIT_MASK(32));
1843                 }
1844         } else
1845                 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1846 }
1847
1848 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1849 {
1850         struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1851         struct ddb_entry *ddb = sess->dd_data;
1852
1853         sdev->hostdata = ddb;
1854         sdev->tagged_supported = 1;
1855         scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1856         return 0;
1857 }
1858
1859 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1860 {
1861         sdev->tagged_supported = 1;
1862         return 0;
1863 }
1864
1865 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1866 {
1867         scsi_deactivate_tcq(sdev, 1);
1868 }
1869
1870 /**
1871  * qla4xxx_del_from_active_array - returns an active srb
1872  * @ha: Pointer to host adapter structure.
1873  * @index: index into the active_array
1874  *
1875  * This routine removes and returns the srb at the specified index
1876  **/
1877 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1878     uint32_t index)
1879 {
1880         struct srb *srb = NULL;
1881         struct scsi_cmnd *cmd = NULL;
1882
1883         cmd = scsi_host_find_tag(ha->host, index);
1884         if (!cmd)
1885                 return srb;
1886
1887         srb = (struct srb *)CMD_SP(cmd);
1888         if (!srb)
1889                 return srb;
1890
1891         /* update counters */
1892         if (srb->flags & SRB_DMA_VALID) {
1893                 ha->req_q_count += srb->iocb_cnt;
1894                 ha->iocb_cnt -= srb->iocb_cnt;
1895                 if (srb->cmd)
1896                         srb->cmd->host_scribble =
1897                                 (unsigned char *)(unsigned long) MAX_SRBS;
1898         }
1899         return srb;
1900 }
1901
1902 /**
1903  * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1904  * @ha: Pointer to host adapter structure.
1905  * @cmd: Scsi Command to wait on.
1906  *
1907  * This routine waits for the command to be returned by the Firmware
1908  * for some max time.
1909  **/
1910 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1911                                       struct scsi_cmnd *cmd)
1912 {
1913         int done = 0;
1914         struct srb *rp;
1915         uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1916         int ret = SUCCESS;
1917
1918         /* Dont wait on command if PCI error is being handled
1919          * by PCI AER driver
1920          */
1921         if (unlikely(pci_channel_offline(ha->pdev)) ||
1922             (test_bit(AF_EEH_BUSY, &ha->flags))) {
1923                 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1924                     ha->host_no, __func__);
1925                 return ret;
1926         }
1927
1928         do {
1929                 /* Checking to see if its returned to OS */
1930                 rp = (struct srb *) CMD_SP(cmd);
1931                 if (rp == NULL) {
1932                         done++;
1933                         break;
1934                 }
1935
1936                 msleep(2000);
1937         } while (max_wait_time--);
1938
1939         return done;
1940 }
1941
1942 /**
1943  * qla4xxx_wait_for_hba_online - waits for HBA to come online
1944  * @ha: Pointer to host adapter structure
1945  **/
1946 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1947 {
1948         unsigned long wait_online;
1949
1950         wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
1951         while (time_before(jiffies, wait_online)) {
1952
1953                 if (adapter_up(ha))
1954                         return QLA_SUCCESS;
1955
1956                 msleep(2000);
1957         }
1958
1959         return QLA_ERROR;
1960 }
1961
1962 /**
1963  * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1964  * @ha: pointer to HBA
1965  * @t: target id
1966  * @l: lun id
1967  *
1968  * This function waits for all outstanding commands to a lun to complete. It
1969  * returns 0 if all pending commands are returned and 1 otherwise.
1970  **/
1971 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1972                                         struct scsi_target *stgt,
1973                                         struct scsi_device *sdev)
1974 {
1975         int cnt;
1976         int status = 0;
1977         struct scsi_cmnd *cmd;
1978
1979         /*
1980          * Waiting for all commands for the designated target or dev
1981          * in the active array
1982          */
1983         for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1984                 cmd = scsi_host_find_tag(ha->host, cnt);
1985                 if (cmd && stgt == scsi_target(cmd->device) &&
1986                     (!sdev || sdev == cmd->device)) {
1987                         if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1988                                 status++;
1989                                 break;
1990                         }
1991                 }
1992         }
1993         return status;
1994 }
1995
1996 /**
1997  * qla4xxx_eh_abort - callback for abort task.
1998  * @cmd: Pointer to Linux's SCSI command structure
1999  *
2000  * This routine is called by the Linux OS to abort the specified
2001  * command.
2002  **/
2003 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2004 {
2005         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2006         unsigned int id = cmd->device->id;
2007         unsigned int lun = cmd->device->lun;
2008         unsigned long serial = cmd->serial_number;
2009         struct srb *srb = NULL;
2010         int ret = SUCCESS;
2011         int wait = 0;
2012
2013         ql4_printk(KERN_INFO, ha,
2014             "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2015             ha->host_no, id, lun, cmd, serial);
2016
2017         srb = (struct srb *) CMD_SP(cmd);
2018
2019         if (!srb)
2020                 return SUCCESS;
2021
2022         kref_get(&srb->srb_ref);
2023
2024         if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2025                 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2026                     ha->host_no, id, lun));
2027                 ret = FAILED;
2028         } else {
2029                 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2030                     ha->host_no, id, lun));
2031                 wait = 1;
2032         }
2033
2034         kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2035
2036         /* Wait for command to complete */
2037         if (wait) {
2038                 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2039                         DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2040                             ha->host_no, id, lun));
2041                         ret = FAILED;
2042                 }
2043         }
2044
2045         ql4_printk(KERN_INFO, ha,
2046             "scsi%ld:%d:%d: Abort command - %s\n",
2047             ha->host_no, id, lun, (ret == SUCCESS) ? "succeded" : "failed");
2048
2049         return ret;
2050 }
2051
2052 /**
2053  * qla4xxx_eh_device_reset - callback for target reset.
2054  * @cmd: Pointer to Linux's SCSI command structure
2055  *
2056  * This routine is called by the Linux OS to reset all luns on the
2057  * specified target.
2058  **/
2059 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2060 {
2061         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2062         struct ddb_entry *ddb_entry = cmd->device->hostdata;
2063         int ret = FAILED, stat;
2064
2065         if (!ddb_entry)
2066                 return ret;
2067
2068         ret = iscsi_block_scsi_eh(cmd);
2069         if (ret)
2070                 return ret;
2071         ret = FAILED;
2072
2073         ql4_printk(KERN_INFO, ha,
2074                    "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2075                    cmd->device->channel, cmd->device->id, cmd->device->lun);
2076
2077         DEBUG2(printk(KERN_INFO
2078                       "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2079                       "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2080                       cmd, jiffies, cmd->request->timeout / HZ,
2081                       ha->dpc_flags, cmd->result, cmd->allowed));
2082
2083         /* FIXME: wait for hba to go online */
2084         stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2085         if (stat != QLA_SUCCESS) {
2086                 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2087                 goto eh_dev_reset_done;
2088         }
2089
2090         if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2091                                          cmd->device)) {
2092                 ql4_printk(KERN_INFO, ha,
2093                            "DEVICE RESET FAILED - waiting for "
2094                            "commands.\n");
2095                 goto eh_dev_reset_done;
2096         }
2097
2098         /* Send marker. */
2099         if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2100                 MM_LUN_RESET) != QLA_SUCCESS)
2101                 goto eh_dev_reset_done;
2102
2103         ql4_printk(KERN_INFO, ha,
2104                    "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2105                    ha->host_no, cmd->device->channel, cmd->device->id,
2106                    cmd->device->lun);
2107
2108         ret = SUCCESS;
2109
2110 eh_dev_reset_done:
2111
2112         return ret;
2113 }
2114
2115 /**
2116  * qla4xxx_eh_target_reset - callback for target reset.
2117  * @cmd: Pointer to Linux's SCSI command structure
2118  *
2119  * This routine is called by the Linux OS to reset the target.
2120  **/
2121 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2122 {
2123         struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2124         struct ddb_entry *ddb_entry = cmd->device->hostdata;
2125         int stat, ret;
2126
2127         if (!ddb_entry)
2128                 return FAILED;
2129
2130         ret = iscsi_block_scsi_eh(cmd);
2131         if (ret)
2132                 return ret;
2133
2134         starget_printk(KERN_INFO, scsi_target(cmd->device),
2135                        "WARM TARGET RESET ISSUED.\n");
2136
2137         DEBUG2(printk(KERN_INFO
2138                       "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2139                       "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2140                       ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2141                       ha->dpc_flags, cmd->result, cmd->allowed));
2142
2143         stat = qla4xxx_reset_target(ha, ddb_entry);
2144         if (stat != QLA_SUCCESS) {
2145                 starget_printk(KERN_INFO, scsi_target(cmd->device),
2146                                "WARM TARGET RESET FAILED.\n");
2147                 return FAILED;
2148         }
2149
2150         if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2151                                          NULL)) {
2152                 starget_printk(KERN_INFO, scsi_target(cmd->device),
2153                                "WARM TARGET DEVICE RESET FAILED - "
2154                                "waiting for commands.\n");
2155                 return FAILED;
2156         }
2157
2158         /* Send marker. */
2159         if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2160                 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2161                 starget_printk(KERN_INFO, scsi_target(cmd->device),
2162                                "WARM TARGET DEVICE RESET FAILED - "
2163                                "marker iocb failed.\n");
2164                 return FAILED;
2165         }
2166
2167         starget_printk(KERN_INFO, scsi_target(cmd->device),
2168                        "WARM TARGET RESET SUCCEEDED.\n");
2169         return SUCCESS;
2170 }
2171
2172 /**
2173  * qla4xxx_eh_host_reset - kernel callback
2174  * @cmd: Pointer to Linux's SCSI command structure
2175  *
2176  * This routine is invoked by the Linux kernel to perform fatal error
2177  * recovery on the specified adapter.
2178  **/
2179 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2180 {
2181         int return_status = FAILED;
2182         struct scsi_qla_host *ha;
2183
2184         ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2185
2186         if (ql4xdontresethba) {
2187                 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2188                      ha->host_no, __func__));
2189                 return FAILED;
2190         }
2191
2192         ql4_printk(KERN_INFO, ha,
2193                    "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2194                    cmd->device->channel, cmd->device->id, cmd->device->lun);
2195
2196         if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2197                 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host.  Adapter "
2198                               "DEAD.\n", ha->host_no, cmd->device->channel,
2199                               __func__));
2200
2201                 return FAILED;
2202         }
2203
2204         if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2205                 if (is_qla8022(ha))
2206                         set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2207                 else
2208                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
2209         }
2210
2211         if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2212                 return_status = SUCCESS;
2213
2214         ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2215                    return_status == FAILED ? "FAILED" : "SUCCEDED");
2216
2217         return return_status;
2218 }
2219
2220 /* PCI AER driver recovers from all correctable errors w/o
2221  * driver intervention. For uncorrectable errors PCI AER
2222  * driver calls the following device driver's callbacks
2223  *
2224  * - Fatal Errors - link_reset
2225  * - Non-Fatal Errors - driver's pci_error_detected() which
2226  * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2227  *
2228  * PCI AER driver calls
2229  * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2230  *               returns RECOVERED or NEED_RESET if fw_hung
2231  * NEED_RESET - driver's slot_reset()
2232  * DISCONNECT - device is dead & cannot recover
2233  * RECOVERED - driver's pci_resume()
2234  */
2235 static pci_ers_result_t
2236 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2237 {
2238         struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2239
2240         ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2241             ha->host_no, __func__, state);
2242
2243         if (!is_aer_supported(ha))
2244                 return PCI_ERS_RESULT_NONE;
2245
2246         switch (state) {
2247         case pci_channel_io_normal:
2248                 clear_bit(AF_EEH_BUSY, &ha->flags);
2249                 return PCI_ERS_RESULT_CAN_RECOVER;
2250         case pci_channel_io_frozen:
2251                 set_bit(AF_EEH_BUSY, &ha->flags);
2252                 qla4xxx_mailbox_premature_completion(ha);
2253                 qla4xxx_free_irqs(ha);
2254                 pci_disable_device(pdev);
2255                 return PCI_ERS_RESULT_NEED_RESET;
2256         case pci_channel_io_perm_failure:
2257                 set_bit(AF_EEH_BUSY, &ha->flags);
2258                 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2259                 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2260                 return PCI_ERS_RESULT_DISCONNECT;
2261         }
2262         return PCI_ERS_RESULT_NEED_RESET;
2263 }
2264
2265 /**
2266  * qla4xxx_pci_mmio_enabled() gets called if
2267  * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2268  * and read/write to the device still works.
2269  **/
2270 static pci_ers_result_t
2271 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2272 {
2273         struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2274
2275         if (!is_aer_supported(ha))
2276                 return PCI_ERS_RESULT_NONE;
2277
2278         if (test_bit(AF_FW_RECOVERY, &ha->flags)) {
2279                 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: firmware hang  -- "
2280                     "mmio_enabled\n", ha->host_no, __func__);
2281                 return PCI_ERS_RESULT_NEED_RESET;
2282         } else
2283                 return PCI_ERS_RESULT_RECOVERED;
2284 }
2285
2286 uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2287 {
2288         uint32_t rval = QLA_ERROR;
2289         int fn;
2290         struct pci_dev *other_pdev = NULL;
2291
2292         ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2293
2294         set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2295
2296         if (test_bit(AF_ONLINE, &ha->flags)) {
2297                 clear_bit(AF_ONLINE, &ha->flags);
2298                 qla4xxx_mark_all_devices_missing(ha);
2299                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2300                 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2301         }
2302
2303         fn = PCI_FUNC(ha->pdev->devfn);
2304         while (fn > 0) {
2305                 fn--;
2306                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2307                     "func %x\n", ha->host_no, __func__, fn);
2308                 /* Get the pci device given the domain, bus,
2309                  * slot/function number */
2310                 other_pdev =
2311                     pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2312                     ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2313                     fn));
2314
2315                 if (!other_pdev)
2316                         continue;
2317
2318                 if (atomic_read(&other_pdev->enable_cnt)) {
2319                         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2320                             "func in enabled state%x\n", ha->host_no,
2321                             __func__, fn);
2322                         pci_dev_put(other_pdev);
2323                         break;
2324                 }
2325                 pci_dev_put(other_pdev);
2326         }
2327
2328         /* The first function on the card, the reset owner will
2329          * start & initialize the firmware. The other functions
2330          * on the card will reset the firmware context
2331          */
2332         if (!fn) {
2333                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2334                     "0x%x is the owner\n", ha->host_no, __func__,
2335                     ha->pdev->devfn);
2336
2337                 qla4_8xxx_idc_lock(ha);
2338                 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2339                     QLA82XX_DEV_COLD);
2340
2341                 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2342                     QLA82XX_IDC_VERSION);
2343
2344                 qla4_8xxx_idc_unlock(ha);
2345                 clear_bit(AF_FW_RECOVERY, &ha->flags);
2346                 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2347                 qla4_8xxx_idc_lock(ha);
2348
2349                 if (rval != QLA_SUCCESS) {
2350                         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2351                             "FAILED\n", ha->host_no, __func__);
2352                         qla4_8xxx_clear_drv_active(ha);
2353                         qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2354                             QLA82XX_DEV_FAILED);
2355                 } else {
2356                         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2357                             "READY\n", ha->host_no, __func__);
2358                         qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2359                             QLA82XX_DEV_READY);
2360                         /* Clear driver state register */
2361                         qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2362                         qla4_8xxx_set_drv_active(ha);
2363                         ha->isp_ops->enable_intrs(ha);
2364                 }
2365                 qla4_8xxx_idc_unlock(ha);
2366         } else {
2367                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2368                     "the reset owner\n", ha->host_no, __func__,
2369                     ha->pdev->devfn);
2370                 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2371                     QLA82XX_DEV_READY)) {
2372                         clear_bit(AF_FW_RECOVERY, &ha->flags);
2373                         rval = qla4xxx_initialize_adapter(ha,
2374                             PRESERVE_DDB_LIST);
2375                         if (rval == QLA_SUCCESS)
2376                                 ha->isp_ops->enable_intrs(ha);
2377                         qla4_8xxx_idc_lock(ha);
2378                         qla4_8xxx_set_drv_active(ha);
2379                         qla4_8xxx_idc_unlock(ha);
2380                 }
2381         }
2382         clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2383         return rval;
2384 }
2385
2386 static pci_ers_result_t
2387 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2388 {
2389         pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2390         struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2391         int rc;
2392
2393         ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2394             ha->host_no, __func__);
2395
2396         if (!is_aer_supported(ha))
2397                 return PCI_ERS_RESULT_NONE;
2398
2399         /* Restore the saved state of PCIe device -
2400          * BAR registers, PCI Config space, PCIX, MSI,
2401          * IOV states
2402          */
2403         pci_restore_state(pdev);
2404
2405         /* pci_restore_state() clears the saved_state flag of the device
2406          * save restored state which resets saved_state flag
2407          */
2408         pci_save_state(pdev);
2409
2410         /* Initialize device or resume if in suspended state */
2411         rc = pci_enable_device(pdev);
2412         if (rc) {
2413                 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2414                     "device after reset\n", ha->host_no, __func__);
2415                 goto exit_slot_reset;
2416         }
2417
2418         ret = qla4xxx_request_irqs(ha);
2419         if (ret) {
2420                 ql4_printk(KERN_WARNING, ha, "Failed to reserve interrupt %d"
2421                     " already in use.\n", pdev->irq);
2422                 goto exit_slot_reset;
2423         }
2424
2425         if (is_qla8022(ha)) {
2426                 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2427                         ret = PCI_ERS_RESULT_RECOVERED;
2428                         goto exit_slot_reset;
2429                 } else
2430                         goto exit_slot_reset;
2431         }
2432
2433 exit_slot_reset:
2434         ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2435             "device after reset\n", ha->host_no, __func__, ret);
2436         return ret;
2437 }
2438
2439 static void
2440 qla4xxx_pci_resume(struct pci_dev *pdev)
2441 {
2442         struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2443         int ret;
2444
2445         ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2446             ha->host_no, __func__);
2447
2448         ret = qla4xxx_wait_for_hba_online(ha);
2449         if (ret != QLA_SUCCESS) {
2450                 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2451                     "resume I/O from slot/link_reset\n", ha->host_no,
2452                      __func__);
2453         }
2454
2455         pci_cleanup_aer_uncorrect_error_status(pdev);
2456         clear_bit(AF_EEH_BUSY, &ha->flags);
2457 }
2458
2459 static struct pci_error_handlers qla4xxx_err_handler = {
2460         .error_detected = qla4xxx_pci_error_detected,
2461         .mmio_enabled = qla4xxx_pci_mmio_enabled,
2462         .slot_reset = qla4xxx_pci_slot_reset,
2463         .resume = qla4xxx_pci_resume,
2464 };
2465
2466 static struct pci_device_id qla4xxx_pci_tbl[] = {
2467         {
2468                 .vendor         = PCI_VENDOR_ID_QLOGIC,
2469                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4010,
2470                 .subvendor      = PCI_ANY_ID,
2471                 .subdevice      = PCI_ANY_ID,
2472         },
2473         {
2474                 .vendor         = PCI_VENDOR_ID_QLOGIC,
2475                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4022,
2476                 .subvendor      = PCI_ANY_ID,
2477                 .subdevice      = PCI_ANY_ID,
2478         },
2479         {
2480                 .vendor         = PCI_VENDOR_ID_QLOGIC,
2481                 .device         = PCI_DEVICE_ID_QLOGIC_ISP4032,
2482                 .subvendor      = PCI_ANY_ID,
2483                 .subdevice      = PCI_ANY_ID,
2484         },
2485         {
2486                 .vendor         = PCI_VENDOR_ID_QLOGIC,
2487                 .device         = PCI_DEVICE_ID_QLOGIC_ISP8022,
2488                 .subvendor      = PCI_ANY_ID,
2489                 .subdevice      = PCI_ANY_ID,
2490         },
2491         {0, 0},
2492 };
2493 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2494
2495 static struct pci_driver qla4xxx_pci_driver = {
2496         .name           = DRIVER_NAME,
2497         .id_table       = qla4xxx_pci_tbl,
2498         .probe          = qla4xxx_probe_adapter,
2499         .remove         = qla4xxx_remove_adapter,
2500         .err_handler = &qla4xxx_err_handler,
2501 };
2502
2503 static int __init qla4xxx_module_init(void)
2504 {
2505         int ret;
2506
2507         /* Allocate cache for SRBs. */
2508         srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2509                                        SLAB_HWCACHE_ALIGN, NULL);
2510         if (srb_cachep == NULL) {
2511                 printk(KERN_ERR
2512                        "%s: Unable to allocate SRB cache..."
2513                        "Failing load!\n", DRIVER_NAME);
2514                 ret = -ENOMEM;
2515                 goto no_srp_cache;
2516         }
2517
2518         /* Derive version string. */
2519         strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2520         if (ql4xextended_error_logging)
2521                 strcat(qla4xxx_version_str, "-debug");
2522
2523         qla4xxx_scsi_transport =
2524                 iscsi_register_transport(&qla4xxx_iscsi_transport);
2525         if (!qla4xxx_scsi_transport){
2526                 ret = -ENODEV;
2527                 goto release_srb_cache;
2528         }
2529
2530         ret = pci_register_driver(&qla4xxx_pci_driver);
2531         if (ret)
2532                 goto unregister_transport;
2533
2534         printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2535         return 0;
2536
2537 unregister_transport:
2538         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2539 release_srb_cache:
2540         kmem_cache_destroy(srb_cachep);
2541 no_srp_cache:
2542         return ret;
2543 }
2544
2545 static void __exit qla4xxx_module_exit(void)
2546 {
2547         pci_unregister_driver(&qla4xxx_pci_driver);
2548         iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2549         kmem_cache_destroy(srb_cachep);
2550 }
2551
2552 module_init(qla4xxx_module_init);
2553 module_exit(qla4xxx_module_exit);
2554
2555 MODULE_AUTHOR("QLogic Corporation");
2556 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2557 MODULE_LICENSE("GPL");
2558 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);