drivers/scsi/qla4xxx/ql4_os.c

   1 /*
   2  * QLogic iSCSI HBA Driver
   3  * Copyright (c)  2003-2010 QLogic Corporation
   4  *
   5  * See LICENSE.qla4xxx for copyright and licensing details.
   6  */
   7 #include <linux/moduleparam.h>
   8 #include <linux/slab.h>
   9 #include <linux/blkdev.h>
  10 #include <linux/iscsi_boot_sysfs.h>
  11 #include <linux/inet.h>
  12
  13 #include <scsi/scsi_tcq.h>
  14 #include <scsi/scsicam.h>
  15
  16 #include "ql4_def.h"
  17 #include "ql4_version.h"
  18 #include "ql4_glbl.h"
  19 #include "ql4_dbg.h"
  20 #include "ql4_inline.h"
  21
  22 /*
  23  * Driver version
  24  */
  25 static char qla4xxx_version_str[40];
  26
  27 /*
  28  * SRB allocation cache
  29  */
  30 static struct kmem_cache *srb_cachep;
  31
  32 /*
  33  * Module parameter information and variables
  34  */
  35 int ql4xdisablesysfsboot = 1;
  36 module_param(ql4xdisablesysfsboot, int, S_IRUGO | S_IWUSR);
  37 MODULE_PARM_DESC(ql4xdisablesysfsboot,
  38                 "Set to disable exporting boot targets to sysfs\n"
  39                 " 0 - Export boot targets\n"
  40                 " 1 - Do not export boot targets (Default)");
  41
  42 int ql4xdontresethba = 0;
  43 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);
  44 MODULE_PARM_DESC(ql4xdontresethba,
  45                 "Don't reset the HBA for driver recovery \n"
  46                 " 0 - It will reset HBA (Default)\n"
  47                 " 1 - It will NOT reset HBA");
  48
  49 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
  50 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);
  51 MODULE_PARM_DESC(ql4xextended_error_logging,
  52                  "Option to enable extended error logging, "
  53                  "Default is 0 - no logging, 1 - debug logging");
  54
  55 int ql4xenablemsix = 1;
  56 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
  57 MODULE_PARM_DESC(ql4xenablemsix,
  58                 "Set to enable MSI or MSI-X interrupt mechanism.\n"
  59                 " 0 = enable INTx interrupt mechanism.\n"
  60                 " 1 = enable MSI-X interrupt mechanism (Default).\n"
  61                 " 2 = enable MSI interrupt mechanism.");
  62
  63 #define QL4_DEF_QDEPTH 32
  64 static int ql4xmaxqdepth = QL4_DEF_QDEPTH;
  65 module_param(ql4xmaxqdepth, int, S_IRUGO | S_IWUSR);
  66 MODULE_PARM_DESC(ql4xmaxqdepth,
  67                 "Maximum queue depth to report for target devices.\n"
  68                 " Default: 32.");
  69
  70 static int ql4xsess_recovery_tmo = QL4_SESS_RECOVERY_TMO;
  71 module_param(ql4xsess_recovery_tmo, int, S_IRUGO);
  72 MODULE_PARM_DESC(ql4xsess_recovery_tmo,
  73                 "Target Session Recovery Timeout.\n"
  74                 " Default: 120 sec.");
  75
  76 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha);
  77 /*
  78  * SCSI host template entry points
  79  */
  80 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
  81
  82 /*
  83  * iSCSI template entry points
  84  */
  85 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
  86                                   enum iscsi_param param, char *buf);
  87 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
  88                                   enum iscsi_host_param param, char *buf);
  89 static int qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data,
  90                                    uint32_t len);
  91 static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
  92                                    enum iscsi_param_type param_type,
  93                                    int param, char *buf);
  94 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
  95 static struct iscsi_endpoint *qla4xxx_ep_connect(struct Scsi_Host *shost,
  96                                                  struct sockaddr *dst_addr,
  97                                                  int non_blocking);
  98 static int qla4xxx_ep_poll(struct iscsi_endpoint *ep, int timeout_ms);
  99 static void qla4xxx_ep_disconnect(struct iscsi_endpoint *ep);
 100 static int qla4xxx_get_ep_param(struct iscsi_endpoint *ep,
 101                                 enum iscsi_param param, char *buf);
 102 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
 103 static struct iscsi_cls_conn *
 104 qla4xxx_conn_create(struct iscsi_cls_session *cls_sess, uint32_t conn_idx);
 105 static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
 106                              struct iscsi_cls_conn *cls_conn,
 107                              uint64_t transport_fd, int is_leading);
 108 static void qla4xxx_conn_destroy(struct iscsi_cls_conn *conn);
 109 static struct iscsi_cls_session *
 110 qla4xxx_session_create(struct iscsi_endpoint *ep, uint16_t cmds_max,
 111                         uint16_t qdepth, uint32_t initial_cmdsn);
 112 static void qla4xxx_session_destroy(struct iscsi_cls_session *sess);
 113 static void qla4xxx_task_work(struct work_struct *wdata);
 114 static int qla4xxx_alloc_pdu(struct iscsi_task *, uint8_t);
 115 static int qla4xxx_task_xmit(struct iscsi_task *);
 116 static void qla4xxx_task_cleanup(struct iscsi_task *);
 117 static void qla4xxx_fail_session(struct iscsi_cls_session *cls_session);
 118 static void qla4xxx_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 119                                    struct iscsi_stats *stats);
 120 /*
 121  * SCSI host template entry points
 122  */
 123 static int qla4xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 124 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
 125 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
 126 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
 127 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
 128 static int qla4xxx_slave_alloc(struct scsi_device *device);
 129 static int qla4xxx_slave_configure(struct scsi_device *device);
 130 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
 131 static mode_t ql4_attr_is_visible(int param_type, int param);
 132 static int qla4xxx_host_reset(struct Scsi_Host *shost, int reset_type);
 133
 134 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
 135     QLA82XX_LEGACY_INTR_CONFIG;
 136
 137 static struct scsi_host_template qla4xxx_driver_template = {
 138         .module                 = THIS_MODULE,
 139         .name                   = DRIVER_NAME,
 140         .proc_name              = DRIVER_NAME,
 141         .queuecommand           = qla4xxx_queuecommand,
 142
 143         .eh_abort_handler       = qla4xxx_eh_abort,
 144         .eh_device_reset_handler = qla4xxx_eh_device_reset,
 145         .eh_target_reset_handler = qla4xxx_eh_target_reset,
 146         .eh_host_reset_handler  = qla4xxx_eh_host_reset,
 147         .eh_timed_out           = qla4xxx_eh_cmd_timed_out,
 148
 149         .slave_configure        = qla4xxx_slave_configure,
 150         .slave_alloc            = qla4xxx_slave_alloc,
 151         .slave_destroy          = qla4xxx_slave_destroy,
 152
 153         .this_id                = -1,
 154         .cmd_per_lun            = 3,
 155         .use_clustering         = ENABLE_CLUSTERING,
 156         .sg_tablesize           = SG_ALL,
 157
 158         .max_sectors            = 0xFFFF,
 159         .shost_attrs            = qla4xxx_host_attrs,
 160         .host_reset             = qla4xxx_host_reset,
 161         .vendor_id              = SCSI_NL_VID_TYPE_PCI | PCI_VENDOR_ID_QLOGIC,
 162 };
 163
 164 static struct iscsi_transport qla4xxx_iscsi_transport = {
 165         .owner                  = THIS_MODULE,
 166         .name                   = DRIVER_NAME,
 167         .caps                   = CAP_TEXT_NEGO |
 168                                   CAP_DATA_PATH_OFFLOAD | CAP_HDRDGST |
 169                                   CAP_DATADGST | CAP_LOGIN_OFFLOAD |
 170                                   CAP_MULTI_R2T,
 171         .attr_is_visible        = ql4_attr_is_visible,
 172         .create_session         = qla4xxx_session_create,
 173         .destroy_session        = qla4xxx_session_destroy,
 174         .start_conn             = qla4xxx_conn_start,
 175         .create_conn            = qla4xxx_conn_create,
 176         .bind_conn              = qla4xxx_conn_bind,
 177         .stop_conn              = iscsi_conn_stop,
 178         .destroy_conn           = qla4xxx_conn_destroy,
 179         .set_param              = iscsi_set_param,
 180         .get_conn_param         = qla4xxx_conn_get_param,
 181         .get_session_param      = iscsi_session_get_param,
 182         .get_ep_param           = qla4xxx_get_ep_param,
 183         .ep_connect             = qla4xxx_ep_connect,
 184         .ep_poll                = qla4xxx_ep_poll,
 185         .ep_disconnect          = qla4xxx_ep_disconnect,
 186         .get_stats              = qla4xxx_conn_get_stats,
 187         .send_pdu               = iscsi_conn_send_pdu,
 188         .xmit_task              = qla4xxx_task_xmit,
 189         .cleanup_task           = qla4xxx_task_cleanup,
 190         .alloc_pdu              = qla4xxx_alloc_pdu,
 191
 192         .get_host_param         = qla4xxx_host_get_param,
 193         .set_iface_param        = qla4xxx_iface_set_param,
 194         .get_iface_param        = qla4xxx_get_iface_param,
 195         .bsg_request            = qla4xxx_bsg_request,
 196 };
 197
 198 static struct scsi_transport_template *qla4xxx_scsi_transport;
 199
 200 static mode_t ql4_attr_is_visible(int param_type, int param)
 201 {
 202         switch (param_type) {
 203         case ISCSI_HOST_PARAM:
 204                 switch (param) {
 205                 case ISCSI_HOST_PARAM_HWADDRESS:
 206                 case ISCSI_HOST_PARAM_IPADDRESS:
 207                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
 208                         return S_IRUGO;
 209                 default:
 210                         return 0;
 211                 }
 212         case ISCSI_PARAM:
 213                 switch (param) {
 214                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
 215                 case ISCSI_PARAM_PERSISTENT_PORT:
 216                 case ISCSI_PARAM_CONN_ADDRESS:
 217                 case ISCSI_PARAM_CONN_PORT:
 218                 case ISCSI_PARAM_TARGET_NAME:
 219                 case ISCSI_PARAM_TPGT:
 220                 case ISCSI_PARAM_TARGET_ALIAS:
 221                 case ISCSI_PARAM_MAX_BURST:
 222                 case ISCSI_PARAM_MAX_R2T:
 223                 case ISCSI_PARAM_FIRST_BURST:
 224                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
 225                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 226                 case ISCSI_PARAM_IFACE_NAME:
 227                         return S_IRUGO;
 228                 default:
 229                         return 0;
 230                 }
 231         case ISCSI_NET_PARAM:
 232                 switch (param) {
 233                 case ISCSI_NET_PARAM_IPV4_ADDR:
 234                 case ISCSI_NET_PARAM_IPV4_SUBNET:
 235                 case ISCSI_NET_PARAM_IPV4_GW:
 236                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 237                 case ISCSI_NET_PARAM_IFACE_ENABLE:
 238                 case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
 239                 case ISCSI_NET_PARAM_IPV6_ADDR:
 240                 case ISCSI_NET_PARAM_IPV6_ROUTER:
 241                 case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
 242                 case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:
 243                 case ISCSI_NET_PARAM_VLAN_ID:
 244                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
 245                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 246                 case ISCSI_NET_PARAM_MTU:
 247                 case ISCSI_NET_PARAM_PORT:
 248                         return S_IRUGO;
 249                 default:
 250                         return 0;
 251                 }
 252         }
 253
 254         return 0;
 255 }
 256
 257 static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
 258                                    enum iscsi_param_type param_type,
 259                                    int param, char *buf)
 260 {
 261         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 262         struct scsi_qla_host *ha = to_qla_host(shost);
 263         int len = -ENOSYS;
 264
 265         if (param_type != ISCSI_NET_PARAM)
 266                 return -ENOSYS;
 267
 268         switch (param) {
 269         case ISCSI_NET_PARAM_IPV4_ADDR:
 270                 len = sprintf(buf, "%pI4\n", &ha->ip_config.ip_address);
 271                 break;
 272         case ISCSI_NET_PARAM_IPV4_SUBNET:
 273                 len = sprintf(buf, "%pI4\n", &ha->ip_config.subnet_mask);
 274                 break;
 275         case ISCSI_NET_PARAM_IPV4_GW:
 276                 len = sprintf(buf, "%pI4\n", &ha->ip_config.gateway);
 277                 break;
 278         case ISCSI_NET_PARAM_IFACE_ENABLE:
 279                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 280                         len = sprintf(buf, "%s\n",
 281                                       (ha->ip_config.ipv4_options &
 282                                        IPOPT_IPV4_PROTOCOL_ENABLE) ?
 283                                       "enabled" : "disabled");
 284                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 285                         len = sprintf(buf, "%s\n",
 286                                       (ha->ip_config.ipv6_options &
 287                                        IPV6_OPT_IPV6_PROTOCOL_ENABLE) ?
 288                                        "enabled" : "disabled");
 289                 break;
 290         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 291                 len = sprintf(buf, "%s\n",
 292                               (ha->ip_config.tcp_options & TCPOPT_DHCP_ENABLE) ?
 293                               "dhcp" : "static");
 294                 break;
 295         case ISCSI_NET_PARAM_IPV6_ADDR:
 296                 if (iface->iface_num == 0)
 297                         len = sprintf(buf, "%pI6\n", &ha->ip_config.ipv6_addr0);
 298                 if (iface->iface_num == 1)
 299                         len = sprintf(buf, "%pI6\n", &ha->ip_config.ipv6_addr1);
 300                 break;
 301         case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
 302                 len = sprintf(buf, "%pI6\n",
 303                               &ha->ip_config.ipv6_link_local_addr);
 304                 break;
 305         case ISCSI_NET_PARAM_IPV6_ROUTER:
 306                 len = sprintf(buf, "%pI6\n",
 307                               &ha->ip_config.ipv6_default_router_addr);
 308                 break;
 309         case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
 310                 len = sprintf(buf, "%s\n",
 311                               (ha->ip_config.ipv6_addl_options &
 312                                IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE) ?
 313                                "nd" : "static");
 314                 break;
 315         case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:
 316                 len = sprintf(buf, "%s\n",
 317                               (ha->ip_config.ipv6_addl_options &
 318                                IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR) ?
 319                                "auto" : "static");
 320                 break;
 321         case ISCSI_NET_PARAM_VLAN_ID:
 322                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 323                         len = sprintf(buf, "%d\n",
 324                                       (ha->ip_config.ipv4_vlan_tag &
 325                                        ISCSI_MAX_VLAN_ID));
 326                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 327                         len = sprintf(buf, "%d\n",
 328                                       (ha->ip_config.ipv6_vlan_tag &
 329                                        ISCSI_MAX_VLAN_ID));
 330                 break;
 331         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 332                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 333                         len = sprintf(buf, "%d\n",
 334                                       ((ha->ip_config.ipv4_vlan_tag >> 13) &
 335                                         ISCSI_MAX_VLAN_PRIORITY));
 336                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 337                         len = sprintf(buf, "%d\n",
 338                                       ((ha->ip_config.ipv6_vlan_tag >> 13) &
 339                                         ISCSI_MAX_VLAN_PRIORITY));
 340                 break;
 341         case ISCSI_NET_PARAM_VLAN_ENABLED:
 342                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 343                         len = sprintf(buf, "%s\n",
 344                                       (ha->ip_config.ipv4_options &
 345                                        IPOPT_VLAN_TAGGING_ENABLE) ?
 346                                        "enabled" : "disabled");
 347                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 348                         len = sprintf(buf, "%s\n",
 349                                       (ha->ip_config.ipv6_options &
 350                                        IPV6_OPT_VLAN_TAGGING_ENABLE) ?
 351                                        "enabled" : "disabled");
 352                 break;
 353         case ISCSI_NET_PARAM_MTU:
 354                 len = sprintf(buf, "%d\n", ha->ip_config.eth_mtu_size);
 355                 break;
 356         case ISCSI_NET_PARAM_PORT:
 357                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 358                         len = sprintf(buf, "%d\n", ha->ip_config.ipv4_port);
 359                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 360                         len = sprintf(buf, "%d\n", ha->ip_config.ipv6_port);
 361                 break;
 362         default:
 363                 len = -ENOSYS;
 364         }
 365
 366         return len;
 367 }
 368
 369 static struct iscsi_endpoint *
 370 qla4xxx_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 371                    int non_blocking)
 372 {
 373         int ret;
 374         struct iscsi_endpoint *ep;
 375         struct qla_endpoint *qla_ep;
 376         struct scsi_qla_host *ha;
 377         struct sockaddr_in *addr;
 378         struct sockaddr_in6 *addr6;
 379
 380         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
 381         if (!shost) {
 382                 ret = -ENXIO;
 383                 printk(KERN_ERR "%s: shost is NULL\n",
 384                        __func__);
 385                 return ERR_PTR(ret);
 386         }
 387
 388         ha = iscsi_host_priv(shost);
 389
 390         ep = iscsi_create_endpoint(sizeof(struct qla_endpoint));
 391         if (!ep) {
 392                 ret = -ENOMEM;
 393                 return ERR_PTR(ret);
 394         }
 395
 396         qla_ep = ep->dd_data;
 397         memset(qla_ep, 0, sizeof(struct qla_endpoint));
 398         if (dst_addr->sa_family == AF_INET) {
 399                 memcpy(&qla_ep->dst_addr, dst_addr, sizeof(struct sockaddr_in));
 400                 addr = (struct sockaddr_in *)&qla_ep->dst_addr;
 401                 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: %pI4\n", __func__,
 402                                   (char *)&addr->sin_addr));
 403         } else if (dst_addr->sa_family == AF_INET6) {
 404                 memcpy(&qla_ep->dst_addr, dst_addr,
 405                        sizeof(struct sockaddr_in6));
 406                 addr6 = (struct sockaddr_in6 *)&qla_ep->dst_addr;
 407                 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: %pI6\n", __func__,
 408                                   (char *)&addr6->sin6_addr));
 409         }
 410
 411         qla_ep->host = shost;
 412
 413         return ep;
 414 }
 415
 416 static int qla4xxx_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 417 {
 418         struct qla_endpoint *qla_ep;
 419         struct scsi_qla_host *ha;
 420         int ret = 0;
 421
 422         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
 423         qla_ep = ep->dd_data;
 424         ha = to_qla_host(qla_ep->host);
 425
 426         if (adapter_up(ha) && !test_bit(AF_BUILD_DDB_LIST, &ha->flags))
 427                 ret = 1;
 428
 429         return ret;
 430 }
 431
 432 static void qla4xxx_ep_disconnect(struct iscsi_endpoint *ep)
 433 {
 434         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
 435         iscsi_destroy_endpoint(ep);
 436 }
 437
 438 static int qla4xxx_get_ep_param(struct iscsi_endpoint *ep,
 439                                 enum iscsi_param param,
 440                                 char *buf)
 441 {
 442         struct qla_endpoint *qla_ep = ep->dd_data;
 443         struct sockaddr *dst_addr;
 444
 445         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
 446
 447         switch (param) {
 448         case ISCSI_PARAM_CONN_PORT:
 449         case ISCSI_PARAM_CONN_ADDRESS:
 450                 if (!qla_ep)
 451                         return -ENOTCONN;
 452
 453                 dst_addr = (struct sockaddr *)&qla_ep->dst_addr;
 454                 if (!dst_addr)
 455                         return -ENOTCONN;
 456
 457                 return iscsi_conn_get_addr_param((struct sockaddr_storage *)
 458                                                  &qla_ep->dst_addr, param, buf);
 459         default:
 460                 return -ENOSYS;
 461         }
 462 }
 463
 464 static void qla4xxx_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 465                                    struct iscsi_stats *stats)
 466 {
 467         struct iscsi_session *sess;
 468         struct iscsi_cls_session *cls_sess;
 469         struct ddb_entry *ddb_entry;
 470         struct scsi_qla_host *ha;
 471         struct ql_iscsi_stats *ql_iscsi_stats;
 472         int stats_size;
 473         int ret;
 474         dma_addr_t iscsi_stats_dma;
 475
 476         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
 477
 478         cls_sess = iscsi_conn_to_session(cls_conn);
 479         sess = cls_sess->dd_data;
 480         ddb_entry = sess->dd_data;
 481         ha = ddb_entry->ha;
 482
 483         stats_size = PAGE_ALIGN(sizeof(struct ql_iscsi_stats));
 484         /* Allocate memory */
 485         ql_iscsi_stats = dma_alloc_coherent(&ha->pdev->dev, stats_size,
 486                                             &iscsi_stats_dma, GFP_KERNEL);
 487         if (!ql_iscsi_stats) {
 488                 ql4_printk(KERN_ERR, ha,
 489                            "Unable to allocate memory for iscsi stats\n");
 490                 goto exit_get_stats;
 491         }
 492
 493         ret =  qla4xxx_get_mgmt_data(ha, ddb_entry->fw_ddb_index, stats_size,
 494                                      iscsi_stats_dma);
 495         if (ret != QLA_SUCCESS) {
 496                 ql4_printk(KERN_ERR, ha,
 497                            "Unable to retreive iscsi stats\n");
 498                 goto free_stats;
 499         }
 500
 501         /* octets */
 502         stats->txdata_octets = le64_to_cpu(ql_iscsi_stats->tx_data_octets);
 503         stats->rxdata_octets = le64_to_cpu(ql_iscsi_stats->rx_data_octets);
 504         /* xmit pdus */
 505         stats->noptx_pdus = le32_to_cpu(ql_iscsi_stats->tx_nopout_pdus);
 506         stats->scsicmd_pdus = le32_to_cpu(ql_iscsi_stats->tx_scsi_cmd_pdus);
 507         stats->tmfcmd_pdus = le32_to_cpu(ql_iscsi_stats->tx_tmf_cmd_pdus);
 508         stats->login_pdus = le32_to_cpu(ql_iscsi_stats->tx_login_cmd_pdus);
 509         stats->text_pdus = le32_to_cpu(ql_iscsi_stats->tx_text_cmd_pdus);
 510         stats->dataout_pdus = le32_to_cpu(ql_iscsi_stats->tx_scsi_write_pdus);
 511         stats->logout_pdus = le32_to_cpu(ql_iscsi_stats->tx_logout_cmd_pdus);
 512         stats->snack_pdus = le32_to_cpu(ql_iscsi_stats->tx_snack_req_pdus);
 513         /* recv pdus */
 514         stats->noprx_pdus = le32_to_cpu(ql_iscsi_stats->rx_nopin_pdus);
 515         stats->scsirsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_scsi_resp_pdus);
 516         stats->tmfrsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_tmf_resp_pdus);
 517         stats->textrsp_pdus = le32_to_cpu(ql_iscsi_stats->rx_text_resp_pdus);
 518         stats->datain_pdus = le32_to_cpu(ql_iscsi_stats->rx_scsi_read_pdus);
 519         stats->logoutrsp_pdus =
 520                         le32_to_cpu(ql_iscsi_stats->rx_logout_resp_pdus);
 521         stats->r2t_pdus = le32_to_cpu(ql_iscsi_stats->rx_r2t_pdus);
 522         stats->async_pdus = le32_to_cpu(ql_iscsi_stats->rx_async_pdus);
 523         stats->rjt_pdus = le32_to_cpu(ql_iscsi_stats->rx_reject_pdus);
 524
 525 free_stats:
 526         dma_free_coherent(&ha->pdev->dev, stats_size, ql_iscsi_stats,
 527                           iscsi_stats_dma);
 528 exit_get_stats:
 529         return;
 530 }
 531
 532 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
 533 {
 534         struct iscsi_cls_session *session;
 535         struct iscsi_session *sess;
 536         unsigned long flags;
 537         enum blk_eh_timer_return ret = BLK_EH_NOT_HANDLED;
 538
 539         session = starget_to_session(scsi_target(sc->device));
 540         sess = session->dd_data;
 541
 542         spin_lock_irqsave(&session->lock, flags);
 543         if (session->state == ISCSI_SESSION_FAILED)
 544                 ret = BLK_EH_RESET_TIMER;
 545         spin_unlock_irqrestore(&session->lock, flags);
 546
 547         return ret;
 548 }
 549
 550 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
 551                                   enum iscsi_host_param param, char *buf)
 552 {
 553         struct scsi_qla_host *ha = to_qla_host(shost);
 554         int len;
 555
 556         switch (param) {
 557         case ISCSI_HOST_PARAM_HWADDRESS:
 558                 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
 559                 break;
 560         case ISCSI_HOST_PARAM_IPADDRESS:
 561                 len = sprintf(buf, "%pI4\n", &ha->ip_config.ip_address);
 562                 break;
 563         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 564                 len = sprintf(buf, "%s\n", ha->name_string);
 565                 break;
 566         default:
 567                 return -ENOSYS;
 568         }
 569
 570         return len;
 571 }
 572
 573 static void qla4xxx_create_ipv4_iface(struct scsi_qla_host *ha)
 574 {
 575         if (ha->iface_ipv4)
 576                 return;
 577
 578         /* IPv4 */
 579         ha->iface_ipv4 = iscsi_create_iface(ha->host,
 580                                             &qla4xxx_iscsi_transport,
 581                                             ISCSI_IFACE_TYPE_IPV4, 0, 0);
 582         if (!ha->iface_ipv4)
 583                 ql4_printk(KERN_ERR, ha, "Could not create IPv4 iSCSI "
 584                            "iface0.\n");
 585 }
 586
 587 static void qla4xxx_create_ipv6_iface(struct scsi_qla_host *ha)
 588 {
 589         if (!ha->iface_ipv6_0)
 590                 /* IPv6 iface-0 */
 591                 ha->iface_ipv6_0 = iscsi_create_iface(ha->host,
 592                                                       &qla4xxx_iscsi_transport,
 593                                                       ISCSI_IFACE_TYPE_IPV6, 0,
 594                                                       0);
 595         if (!ha->iface_ipv6_0)
 596                 ql4_printk(KERN_ERR, ha, "Could not create IPv6 iSCSI "
 597                            "iface0.\n");
 598
 599         if (!ha->iface_ipv6_1)
 600                 /* IPv6 iface-1 */
 601                 ha->iface_ipv6_1 = iscsi_create_iface(ha->host,
 602                                                       &qla4xxx_iscsi_transport,
 603                                                       ISCSI_IFACE_TYPE_IPV6, 1,
 604                                                       0);
 605         if (!ha->iface_ipv6_1)
 606                 ql4_printk(KERN_ERR, ha, "Could not create IPv6 iSCSI "
 607                            "iface1.\n");
 608 }
 609
 610 static void qla4xxx_create_ifaces(struct scsi_qla_host *ha)
 611 {
 612         if (ha->ip_config.ipv4_options & IPOPT_IPV4_PROTOCOL_ENABLE)
 613                 qla4xxx_create_ipv4_iface(ha);
 614
 615         if (ha->ip_config.ipv6_options & IPV6_OPT_IPV6_PROTOCOL_ENABLE)
 616                 qla4xxx_create_ipv6_iface(ha);
 617 }
 618
 619 static void qla4xxx_destroy_ipv4_iface(struct scsi_qla_host *ha)
 620 {
 621         if (ha->iface_ipv4) {
 622                 iscsi_destroy_iface(ha->iface_ipv4);
 623                 ha->iface_ipv4 = NULL;
 624         }
 625 }
 626
 627 static void qla4xxx_destroy_ipv6_iface(struct scsi_qla_host *ha)
 628 {
 629         if (ha->iface_ipv6_0) {
 630                 iscsi_destroy_iface(ha->iface_ipv6_0);
 631                 ha->iface_ipv6_0 = NULL;
 632         }
 633         if (ha->iface_ipv6_1) {
 634                 iscsi_destroy_iface(ha->iface_ipv6_1);
 635                 ha->iface_ipv6_1 = NULL;
 636         }
 637 }
 638
 639 static void qla4xxx_destroy_ifaces(struct scsi_qla_host *ha)
 640 {
 641         qla4xxx_destroy_ipv4_iface(ha);
 642         qla4xxx_destroy_ipv6_iface(ha);
 643 }
 644
 645 static void qla4xxx_set_ipv6(struct scsi_qla_host *ha,
 646                              struct iscsi_iface_param_info *iface_param,
 647                              struct addr_ctrl_blk *init_fw_cb)
 648 {
 649         /*
 650          * iface_num 0 is valid for IPv6 Addr, linklocal, router, autocfg.
 651          * iface_num 1 is valid only for IPv6 Addr.
 652          */
 653         switch (iface_param->param) {
 654         case ISCSI_NET_PARAM_IPV6_ADDR:
 655                 if (iface_param->iface_num & 0x1)
 656                         /* IPv6 Addr 1 */
 657                         memcpy(init_fw_cb->ipv6_addr1, iface_param->value,
 658                                sizeof(init_fw_cb->ipv6_addr1));
 659                 else
 660                         /* IPv6 Addr 0 */
 661                         memcpy(init_fw_cb->ipv6_addr0, iface_param->value,
 662                                sizeof(init_fw_cb->ipv6_addr0));
 663                 break;
 664         case ISCSI_NET_PARAM_IPV6_LINKLOCAL:
 665                 if (iface_param->iface_num & 0x1)
 666                         break;
 667                 memcpy(init_fw_cb->ipv6_if_id, &iface_param->value[8],
 668                        sizeof(init_fw_cb->ipv6_if_id));
 669                 break;
 670         case ISCSI_NET_PARAM_IPV6_ROUTER:
 671                 if (iface_param->iface_num & 0x1)
 672                         break;
 673                 memcpy(init_fw_cb->ipv6_dflt_rtr_addr, iface_param->value,
 674                        sizeof(init_fw_cb->ipv6_dflt_rtr_addr));
 675                 break;
 676         case ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG:
 677                 /* Autocfg applies to even interface */
 678                 if (iface_param->iface_num & 0x1)
 679                         break;
 680
 681                 if (iface_param->value[0] == ISCSI_IPV6_AUTOCFG_DISABLE)
 682                         init_fw_cb->ipv6_addtl_opts &=
 683                                 cpu_to_le16(
 684                                   ~IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE);
 685                 else if (iface_param->value[0] == ISCSI_IPV6_AUTOCFG_ND_ENABLE)
 686                         init_fw_cb->ipv6_addtl_opts |=
 687                                 cpu_to_le16(
 688                                   IPV6_ADDOPT_NEIGHBOR_DISCOVERY_ADDR_ENABLE);
 689                 else
 690                         ql4_printk(KERN_ERR, ha, "Invalid autocfg setting for "
 691                                    "IPv6 addr\n");
 692                 break;
 693         case ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG:
 694                 /* Autocfg applies to even interface */
 695                 if (iface_param->iface_num & 0x1)
 696                         break;
 697
 698                 if (iface_param->value[0] ==
 699                     ISCSI_IPV6_LINKLOCAL_AUTOCFG_ENABLE)
 700                         init_fw_cb->ipv6_addtl_opts |= cpu_to_le16(
 701                                         IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR);
 702                 else if (iface_param->value[0] ==
 703                          ISCSI_IPV6_LINKLOCAL_AUTOCFG_DISABLE)
 704                         init_fw_cb->ipv6_addtl_opts &= cpu_to_le16(
 705                                        ~IPV6_ADDOPT_AUTOCONFIG_LINK_LOCAL_ADDR);
 706                 else
 707                         ql4_printk(KERN_ERR, ha, "Invalid autocfg setting for "
 708                                    "IPv6 linklocal addr\n");
 709                 break;
 710         case ISCSI_NET_PARAM_IPV6_ROUTER_AUTOCFG:
 711                 /* Autocfg applies to even interface */
 712                 if (iface_param->iface_num & 0x1)
 713                         break;
 714
 715                 if (iface_param->value[0] == ISCSI_IPV6_ROUTER_AUTOCFG_ENABLE)
 716                         memset(init_fw_cb->ipv6_dflt_rtr_addr, 0,
 717                                sizeof(init_fw_cb->ipv6_dflt_rtr_addr));
 718                 break;
 719         case ISCSI_NET_PARAM_IFACE_ENABLE:
 720                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE) {
 721                         init_fw_cb->ipv6_opts |=
 722                                 cpu_to_le16(IPV6_OPT_IPV6_PROTOCOL_ENABLE);
 723                         qla4xxx_create_ipv6_iface(ha);
 724                 } else {
 725                         init_fw_cb->ipv6_opts &=
 726                                 cpu_to_le16(~IPV6_OPT_IPV6_PROTOCOL_ENABLE &
 727                                             0xFFFF);
 728                         qla4xxx_destroy_ipv6_iface(ha);
 729                 }
 730                 break;
 731         case ISCSI_NET_PARAM_VLAN_TAG:
 732                 if (iface_param->len != sizeof(init_fw_cb->ipv6_vlan_tag))
 733                         break;
 734                 init_fw_cb->ipv6_vlan_tag =
 735                                 cpu_to_be16(*(uint16_t *)iface_param->value);
 736                 break;
 737         case ISCSI_NET_PARAM_VLAN_ENABLED:
 738                 if (iface_param->value[0] == ISCSI_VLAN_ENABLE)
 739                         init_fw_cb->ipv6_opts |=
 740                                 cpu_to_le16(IPV6_OPT_VLAN_TAGGING_ENABLE);
 741                 else
 742                         init_fw_cb->ipv6_opts &=
 743                                 cpu_to_le16(~IPV6_OPT_VLAN_TAGGING_ENABLE);
 744                 break;
 745         case ISCSI_NET_PARAM_MTU:
 746                 init_fw_cb->eth_mtu_size =
 747                                 cpu_to_le16(*(uint16_t *)iface_param->value);
 748                 break;
 749         case ISCSI_NET_PARAM_PORT:
 750                 /* Autocfg applies to even interface */
 751                 if (iface_param->iface_num & 0x1)
 752                         break;
 753
 754                 init_fw_cb->ipv6_port =
 755                                 cpu_to_le16(*(uint16_t *)iface_param->value);
 756                 break;
 757         default:
 758                 ql4_printk(KERN_ERR, ha, "Unknown IPv6 param = %d\n",
 759                            iface_param->param);
 760                 break;
 761         }
 762 }
 763
 764 static void qla4xxx_set_ipv4(struct scsi_qla_host *ha,
 765                              struct iscsi_iface_param_info *iface_param,
 766                              struct addr_ctrl_blk *init_fw_cb)
 767 {
 768         switch (iface_param->param) {
 769         case ISCSI_NET_PARAM_IPV4_ADDR:
 770                 memcpy(init_fw_cb->ipv4_addr, iface_param->value,
 771                        sizeof(init_fw_cb->ipv4_addr));
 772                 break;
 773         case ISCSI_NET_PARAM_IPV4_SUBNET:
 774                 memcpy(init_fw_cb->ipv4_subnet, iface_param->value,
 775                        sizeof(init_fw_cb->ipv4_subnet));
 776                 break;
 777         case ISCSI_NET_PARAM_IPV4_GW:
 778                 memcpy(init_fw_cb->ipv4_gw_addr, iface_param->value,
 779                        sizeof(init_fw_cb->ipv4_gw_addr));
 780                 break;
 781         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 782                 if (iface_param->value[0] == ISCSI_BOOTPROTO_DHCP)
 783                         init_fw_cb->ipv4_tcp_opts |=
 784                                         cpu_to_le16(TCPOPT_DHCP_ENABLE);
 785                 else if (iface_param->value[0] == ISCSI_BOOTPROTO_STATIC)
 786                         init_fw_cb->ipv4_tcp_opts &=
 787                                         cpu_to_le16(~TCPOPT_DHCP_ENABLE);
 788                 else
 789                         ql4_printk(KERN_ERR, ha, "Invalid IPv4 bootproto\n");
 790                 break;
 791         case ISCSI_NET_PARAM_IFACE_ENABLE:
 792                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE) {
 793                         init_fw_cb->ipv4_ip_opts |=
 794                                 cpu_to_le16(IPOPT_IPV4_PROTOCOL_ENABLE);
 795                         qla4xxx_create_ipv4_iface(ha);
 796                 } else {
 797                         init_fw_cb->ipv4_ip_opts &=
 798                                 cpu_to_le16(~IPOPT_IPV4_PROTOCOL_ENABLE &
 799                                             0xFFFF);
 800                         qla4xxx_destroy_ipv4_iface(ha);
 801                 }
 802                 break;
 803         case ISCSI_NET_PARAM_VLAN_TAG:
 804                 if (iface_param->len != sizeof(init_fw_cb->ipv4_vlan_tag))
 805                         break;
 806                 init_fw_cb->ipv4_vlan_tag =
 807                                 cpu_to_be16(*(uint16_t *)iface_param->value);
 808                 break;
 809         case ISCSI_NET_PARAM_VLAN_ENABLED:
 810                 if (iface_param->value[0] == ISCSI_VLAN_ENABLE)
 811                         init_fw_cb->ipv4_ip_opts |=
 812                                         cpu_to_le16(IPOPT_VLAN_TAGGING_ENABLE);
 813                 else
 814                         init_fw_cb->ipv4_ip_opts &=
 815                                         cpu_to_le16(~IPOPT_VLAN_TAGGING_ENABLE);
 816                 break;
 817         case ISCSI_NET_PARAM_MTU:
 818                 init_fw_cb->eth_mtu_size =
 819                                 cpu_to_le16(*(uint16_t *)iface_param->value);
 820                 break;
 821         case ISCSI_NET_PARAM_PORT:
 822                 init_fw_cb->ipv4_port =
 823                                 cpu_to_le16(*(uint16_t *)iface_param->value);
 824                 break;
 825         default:
 826                 ql4_printk(KERN_ERR, ha, "Unknown IPv4 param = %d\n",
 827                            iface_param->param);
 828                 break;
 829         }
 830 }
 831
 832 static void
 833 qla4xxx_initcb_to_acb(struct addr_ctrl_blk *init_fw_cb)
 834 {
 835         struct addr_ctrl_blk_def *acb;
 836         acb = (struct addr_ctrl_blk_def *)init_fw_cb;
 837         memset(acb->reserved1, 0, sizeof(acb->reserved1));
 838         memset(acb->reserved2, 0, sizeof(acb->reserved2));
 839         memset(acb->reserved3, 0, sizeof(acb->reserved3));
 840         memset(acb->reserved4, 0, sizeof(acb->reserved4));
 841         memset(acb->reserved5, 0, sizeof(acb->reserved5));
 842         memset(acb->reserved6, 0, sizeof(acb->reserved6));
 843         memset(acb->reserved7, 0, sizeof(acb->reserved7));
 844         memset(acb->reserved8, 0, sizeof(acb->reserved8));
 845         memset(acb->reserved9, 0, sizeof(acb->reserved9));
 846         memset(acb->reserved10, 0, sizeof(acb->reserved10));
 847         memset(acb->reserved11, 0, sizeof(acb->reserved11));
 848         memset(acb->reserved12, 0, sizeof(acb->reserved12));
 849         memset(acb->reserved13, 0, sizeof(acb->reserved13));
 850         memset(acb->reserved14, 0, sizeof(acb->reserved14));
 851         memset(acb->reserved15, 0, sizeof(acb->reserved15));
 852 }
 853
 854 static int
 855 qla4xxx_iface_set_param(struct Scsi_Host *shost, void *data, uint32_t len)
 856 {
 857         struct scsi_qla_host *ha = to_qla_host(shost);
 858         int rval = 0;
 859         struct iscsi_iface_param_info *iface_param = NULL;
 860         struct addr_ctrl_blk *init_fw_cb = NULL;
 861         dma_addr_t init_fw_cb_dma;
 862         uint32_t mbox_cmd[MBOX_REG_COUNT];
 863         uint32_t mbox_sts[MBOX_REG_COUNT];
 864         uint32_t rem = len;
 865         struct nlattr *attr;
 866
 867         init_fw_cb = dma_alloc_coherent(&ha->pdev->dev,
 868                                         sizeof(struct addr_ctrl_blk),
 869                                         &init_fw_cb_dma, GFP_KERNEL);
 870         if (!init_fw_cb) {
 871                 ql4_printk(KERN_ERR, ha, "%s: Unable to alloc init_cb\n",
 872                            __func__);
 873                 return -ENOMEM;
 874         }
 875
 876         memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
 877         memset(&mbox_cmd, 0, sizeof(mbox_cmd));
 878         memset(&mbox_sts, 0, sizeof(mbox_sts));
 879
 880         if (qla4xxx_get_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma)) {
 881                 ql4_printk(KERN_ERR, ha, "%s: get ifcb failed\n", __func__);
 882                 rval = -EIO;
 883                 goto exit_init_fw_cb;
 884         }
 885
 886         nla_for_each_attr(attr, data, len, rem) {
 887                 iface_param = nla_data(attr);
 888
 889                 if (iface_param->param_type != ISCSI_NET_PARAM)
 890                         continue;
 891
 892                 switch (iface_param->iface_type) {
 893                 case ISCSI_IFACE_TYPE_IPV4:
 894                         switch (iface_param->iface_num) {
 895                         case 0:
 896                                 qla4xxx_set_ipv4(ha, iface_param, init_fw_cb);
 897                                 break;
 898                         default:
 899                                 /* Cannot have more than one IPv4 interface */
 900                                 ql4_printk(KERN_ERR, ha, "Invalid IPv4 iface "
 901                                            "number = %d\n",
 902                                            iface_param->iface_num);
 903                                 break;
 904                         }
 905                         break;
 906                 case ISCSI_IFACE_TYPE_IPV6:
 907                         switch (iface_param->iface_num) {
 908                         case 0:
 909                         case 1:
 910                                 qla4xxx_set_ipv6(ha, iface_param, init_fw_cb);
 911                                 break;
 912                         default:
 913                                 /* Cannot have more than two IPv6 interface */
 914                                 ql4_printk(KERN_ERR, ha, "Invalid IPv6 iface "
 915                                            "number = %d\n",
 916                                            iface_param->iface_num);
 917                                 break;
 918                         }
 919                         break;
 920                 default:
 921                         ql4_printk(KERN_ERR, ha, "Invalid iface type\n");
 922                         break;
 923                 }
 924         }
 925
 926         init_fw_cb->cookie = cpu_to_le32(0x11BEAD5A);
 927
 928         rval = qla4xxx_set_flash(ha, init_fw_cb_dma, FLASH_SEGMENT_IFCB,
 929                                  sizeof(struct addr_ctrl_blk),
 930                                  FLASH_OPT_RMW_COMMIT);
 931         if (rval != QLA_SUCCESS) {
 932                 ql4_printk(KERN_ERR, ha, "%s: set flash mbx failed\n",
 933                            __func__);
 934                 rval = -EIO;
 935                 goto exit_init_fw_cb;
 936         }
 937
 938         qla4xxx_disable_acb(ha);
 939
 940         qla4xxx_initcb_to_acb(init_fw_cb);
 941
 942         rval = qla4xxx_set_acb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb_dma);
 943         if (rval != QLA_SUCCESS) {
 944                 ql4_printk(KERN_ERR, ha, "%s: set acb mbx failed\n",
 945                            __func__);
 946                 rval = -EIO;
 947                 goto exit_init_fw_cb;
 948         }
 949
 950         memset(init_fw_cb, 0, sizeof(struct addr_ctrl_blk));
 951         qla4xxx_update_local_ifcb(ha, &mbox_cmd[0], &mbox_sts[0], init_fw_cb,
 952                                   init_fw_cb_dma);
 953
 954 exit_init_fw_cb:
 955         dma_free_coherent(&ha->pdev->dev, sizeof(struct addr_ctrl_blk),
 956                           init_fw_cb, init_fw_cb_dma);
 957
 958         return rval;
 959 }
 960
 961 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *cls_conn,
 962                                   enum iscsi_param param, char *buf)
 963 {
 964         struct iscsi_conn *conn;
 965         struct qla_conn *qla_conn;
 966         struct sockaddr *dst_addr;
 967         int len = 0;
 968
 969         conn = cls_conn->dd_data;
 970         qla_conn = conn->dd_data;
 971         dst_addr = &qla_conn->qla_ep->dst_addr;
 972
 973         switch (param) {
 974         case ISCSI_PARAM_CONN_PORT:
 975         case ISCSI_PARAM_CONN_ADDRESS:
 976                 return iscsi_conn_get_addr_param((struct sockaddr_storage *)
 977                                                  dst_addr, param, buf);
 978         default:
 979                 return iscsi_conn_get_param(cls_conn, param, buf);
 980         }
 981
 982         return len;
 983
 984 }
 985
 986 int qla4xxx_get_ddb_index(struct scsi_qla_host *ha, uint16_t *ddb_index)
 987 {
 988         uint32_t mbx_sts = 0;
 989         uint16_t tmp_ddb_index;
 990         int ret;
 991
 992 get_ddb_index:
 993         tmp_ddb_index = find_first_zero_bit(ha->ddb_idx_map, MAX_DDB_ENTRIES);
 994
 995         if (tmp_ddb_index >= MAX_DDB_ENTRIES) {
 996                 DEBUG2(ql4_printk(KERN_INFO, ha,
 997                                   "Free DDB index not available\n"));
 998                 ret = QLA_ERROR;
 999                 goto exit_get_ddb_index;
1000         }
1001
1002         if (test_and_set_bit(tmp_ddb_index, ha->ddb_idx_map))
1003                 goto get_ddb_index;
1004
1005         DEBUG2(ql4_printk(KERN_INFO, ha,
1006                           "Found a free DDB index at %d\n", tmp_ddb_index));
1007         ret = qla4xxx_req_ddb_entry(ha, tmp_ddb_index, &mbx_sts);
1008         if (ret == QLA_ERROR) {
1009                 if (mbx_sts == MBOX_STS_COMMAND_ERROR) {
1010                         ql4_printk(KERN_INFO, ha,
1011                                    "DDB index = %d not available trying next\n",
1012                                    tmp_ddb_index);
1013                         goto get_ddb_index;
1014                 }
1015                 DEBUG2(ql4_printk(KERN_INFO, ha,
1016                                   "Free FW DDB not available\n"));
1017         }
1018
1019         *ddb_index = tmp_ddb_index;
1020
1021 exit_get_ddb_index:
1022         return ret;
1023 }
1024
1025 static int qla4xxx_match_ipaddress(struct scsi_qla_host *ha,
1026                                    struct ddb_entry *ddb_entry,
1027                                    char *existing_ipaddr,
1028                                    char *user_ipaddr)
1029 {
1030         uint8_t dst_ipaddr[IPv6_ADDR_LEN];
1031         char formatted_ipaddr[DDB_IPADDR_LEN];
1032         int status = QLA_SUCCESS, ret = 0;
1033
1034         if (ddb_entry->fw_ddb_entry.options & DDB_OPT_IPV6_DEVICE) {
1035                 ret = in6_pton(user_ipaddr, strlen(user_ipaddr), dst_ipaddr,
1036                                '\0', NULL);
1037                 if (ret == 0) {
1038                         status = QLA_ERROR;
1039                         goto out_match;
1040                 }
1041                 ret = sprintf(formatted_ipaddr, "%pI6", dst_ipaddr);
1042         } else {
1043                 ret = in4_pton(user_ipaddr, strlen(user_ipaddr), dst_ipaddr,
1044                                '\0', NULL);
1045                 if (ret == 0) {
1046                         status = QLA_ERROR;
1047                         goto out_match;
1048                 }
1049                 ret = sprintf(formatted_ipaddr, "%pI4", dst_ipaddr);
1050         }
1051
1052         if (strcmp(existing_ipaddr, formatted_ipaddr))
1053                 status = QLA_ERROR;
1054
1055 out_match:
1056         return status;
1057 }
1058
1059 static int qla4xxx_match_fwdb_session(struct scsi_qla_host *ha,
1060                                       struct iscsi_cls_conn *cls_conn)
1061 {
1062         int idx = 0, max_ddbs, rval;
1063         struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
1064         struct iscsi_session *sess, *existing_sess;
1065         struct iscsi_conn *conn, *existing_conn;
1066         struct ddb_entry *ddb_entry;
1067
1068         sess = cls_sess->dd_data;
1069         conn = cls_conn->dd_data;
1070
1071         if (sess->targetname == NULL ||
1072             conn->persistent_address == NULL ||
1073             conn->persistent_port == 0)
1074                 return QLA_ERROR;
1075
1076         max_ddbs =  is_qla40XX(ha) ? MAX_DEV_DB_ENTRIES_40XX :
1077                                      MAX_DEV_DB_ENTRIES;
1078
1079         for (idx = 0; idx < max_ddbs; idx++) {
1080                 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, idx);
1081                 if (ddb_entry == NULL)
1082                         continue;
1083
1084                 if (ddb_entry->ddb_type != FLASH_DDB)
1085                         continue;
1086
1087                 existing_sess = ddb_entry->sess->dd_data;
1088                 existing_conn = ddb_entry->conn->dd_data;
1089
1090                 if (existing_sess->targetname == NULL ||
1091                     existing_conn->persistent_address == NULL ||
1092                     existing_conn->persistent_port == 0)
1093                         continue;
1094
1095                 DEBUG2(ql4_printk(KERN_INFO, ha,
1096                                   "IQN = %s User IQN = %s\n",
1097                                   existing_sess->targetname,
1098                                   sess->targetname));
1099
1100                 DEBUG2(ql4_printk(KERN_INFO, ha,
1101                                   "IP = %s User IP = %s\n",
1102                                   existing_conn->persistent_address,
1103                                   conn->persistent_address));
1104
1105                 DEBUG2(ql4_printk(KERN_INFO, ha,
1106                                   "Port = %d User Port = %d\n",
1107                                   existing_conn->persistent_port,
1108                                   conn->persistent_port));
1109
1110                 if (strcmp(existing_sess->targetname, sess->targetname))
1111                         continue;
1112                 rval = qla4xxx_match_ipaddress(ha, ddb_entry,
1113                                         existing_conn->persistent_address,
1114                                         conn->persistent_address);
1115                 if (rval == QLA_ERROR)
1116                         continue;
1117                 if (existing_conn->persistent_port != conn->persistent_port)
1118                         continue;
1119                 break;
1120         }
1121
1122         if (idx == max_ddbs)
1123                 return QLA_ERROR;
1124
1125         DEBUG2(ql4_printk(KERN_INFO, ha,
1126                           "Match found in fwdb sessions\n"));
1127         return QLA_SUCCESS;
1128 }
1129
1130 static struct iscsi_cls_session *
1131 qla4xxx_session_create(struct iscsi_endpoint *ep,
1132                         uint16_t cmds_max, uint16_t qdepth,
1133                         uint32_t initial_cmdsn)
1134 {
1135         struct iscsi_cls_session *cls_sess;
1136         struct scsi_qla_host *ha;
1137         struct qla_endpoint *qla_ep;
1138         struct ddb_entry *ddb_entry;
1139         uint16_t ddb_index;
1140         struct iscsi_session *sess;
1141         struct sockaddr *dst_addr;
1142         int ret;
1143
1144         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1145         if (!ep) {
1146                 printk(KERN_ERR "qla4xxx: missing ep.\n");
1147                 return NULL;
1148         }
1149
1150         qla_ep = ep->dd_data;
1151         dst_addr = (struct sockaddr *)&qla_ep->dst_addr;
1152         ha = to_qla_host(qla_ep->host);
1153
1154         ret = qla4xxx_get_ddb_index(ha, &ddb_index);
1155         if (ret == QLA_ERROR)
1156                 return NULL;
1157
1158         cls_sess = iscsi_session_setup(&qla4xxx_iscsi_transport, qla_ep->host,
1159                                        cmds_max, sizeof(struct ddb_entry),
1160                                        sizeof(struct ql4_task_data),
1161                                        initial_cmdsn, ddb_index);
1162         if (!cls_sess)
1163                 return NULL;
1164
1165         sess = cls_sess->dd_data;
1166         ddb_entry = sess->dd_data;
1167         ddb_entry->fw_ddb_index = ddb_index;
1168         ddb_entry->fw_ddb_device_state = DDB_DS_NO_CONNECTION_ACTIVE;
1169         ddb_entry->ha = ha;
1170         ddb_entry->sess = cls_sess;
1171         ddb_entry->unblock_sess = qla4xxx_unblock_ddb;
1172         ddb_entry->ddb_change = qla4xxx_ddb_change;
1173         cls_sess->recovery_tmo = ql4xsess_recovery_tmo;
1174         ha->fw_ddb_index_map[ddb_entry->fw_ddb_index] = ddb_entry;
1175         ha->tot_ddbs++;
1176
1177         return cls_sess;
1178 }
1179
1180 static void qla4xxx_session_destroy(struct iscsi_cls_session *cls_sess)
1181 {
1182         struct iscsi_session *sess;
1183         struct ddb_entry *ddb_entry;
1184         struct scsi_qla_host *ha;
1185         unsigned long flags;
1186
1187         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1188         sess = cls_sess->dd_data;
1189         ddb_entry = sess->dd_data;
1190         ha = ddb_entry->ha;
1191
1192         qla4xxx_clear_ddb_entry(ha, ddb_entry->fw_ddb_index);
1193
1194         spin_lock_irqsave(&ha->hardware_lock, flags);
1195         qla4xxx_free_ddb(ha, ddb_entry);
1196         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1197         iscsi_session_teardown(cls_sess);
1198 }
1199
1200 static struct iscsi_cls_conn *
1201 qla4xxx_conn_create(struct iscsi_cls_session *cls_sess, uint32_t conn_idx)
1202 {
1203         struct iscsi_cls_conn *cls_conn;
1204         struct iscsi_session *sess;
1205         struct ddb_entry *ddb_entry;
1206
1207         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1208         cls_conn = iscsi_conn_setup(cls_sess, sizeof(struct qla_conn),
1209                                     conn_idx);
1210         if (!cls_conn)
1211                 return NULL;
1212
1213         sess = cls_sess->dd_data;
1214         ddb_entry = sess->dd_data;
1215         ddb_entry->conn = cls_conn;
1216
1217         return cls_conn;
1218 }
1219
1220 static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
1221                              struct iscsi_cls_conn *cls_conn,
1222                              uint64_t transport_fd, int is_leading)
1223 {
1224         struct iscsi_conn *conn;
1225         struct qla_conn *qla_conn;
1226         struct iscsi_endpoint *ep;
1227
1228         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1229
1230         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
1231                 return -EINVAL;
1232         ep = iscsi_lookup_endpoint(transport_fd);
1233         conn = cls_conn->dd_data;
1234         qla_conn = conn->dd_data;
1235         qla_conn->qla_ep = ep->dd_data;
1236         return 0;
1237 }
1238
1239 static int qla4xxx_conn_start(struct iscsi_cls_conn *cls_conn)
1240 {
1241         struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
1242         struct iscsi_session *sess;
1243         struct ddb_entry *ddb_entry;
1244         struct scsi_qla_host *ha;
1245         struct dev_db_entry *fw_ddb_entry = NULL;
1246         dma_addr_t fw_ddb_entry_dma;
1247         uint32_t mbx_sts = 0;
1248         int ret = 0;
1249         int status = QLA_SUCCESS;
1250
1251         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1252         sess = cls_sess->dd_data;
1253         ddb_entry = sess->dd_data;
1254         ha = ddb_entry->ha;
1255
1256         /* Check if we have  matching FW DDB, if yes then do not
1257          * login to this target. This could cause target to logout previous
1258          * connection
1259          */
1260         ret = qla4xxx_match_fwdb_session(ha, cls_conn);
1261         if (ret == QLA_SUCCESS) {
1262                 ql4_printk(KERN_INFO, ha,
1263                            "Session already exist in FW.\n");
1264                 ret = -EEXIST;
1265                 goto exit_conn_start;
1266         }
1267
1268         fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1269                                           &fw_ddb_entry_dma, GFP_KERNEL);
1270         if (!fw_ddb_entry) {
1271                 ql4_printk(KERN_ERR, ha,
1272                            "%s: Unable to allocate dma buffer\n", __func__);
1273                 ret = -ENOMEM;
1274                 goto exit_conn_start;
1275         }
1276
1277         ret = qla4xxx_set_param_ddbentry(ha, ddb_entry, cls_conn, &mbx_sts);
1278         if (ret) {
1279                 /* If iscsid is stopped and started then no need to do
1280                 * set param again since ddb state will be already
1281                 * active and FW does not allow set ddb to an
1282                 * active session.
1283                 */
1284                 if (mbx_sts)
1285                         if (ddb_entry->fw_ddb_device_state ==
1286                                                 DDB_DS_SESSION_ACTIVE) {
1287                                 ddb_entry->unblock_sess(ddb_entry->sess);
1288                                 goto exit_set_param;
1289                         }
1290
1291                 ql4_printk(KERN_ERR, ha, "%s: Failed set param for index[%d]\n",
1292                            __func__, ddb_entry->fw_ddb_index);
1293                 goto exit_conn_start;
1294         }
1295
1296         status = qla4xxx_conn_open(ha, ddb_entry->fw_ddb_index);
1297         if (status == QLA_ERROR) {
1298                 ql4_printk(KERN_ERR, ha, "%s: Login failed: %s\n", __func__,
1299                            sess->targetname);
1300                 ret = -EINVAL;
1301                 goto exit_conn_start;
1302         }
1303
1304         if (ddb_entry->fw_ddb_device_state == DDB_DS_NO_CONNECTION_ACTIVE)
1305                 ddb_entry->fw_ddb_device_state = DDB_DS_LOGIN_IN_PROCESS;
1306
1307         DEBUG2(printk(KERN_INFO "%s: DDB state [%d]\n", __func__,
1308                       ddb_entry->fw_ddb_device_state));
1309
1310 exit_set_param:
1311         ret = 0;
1312
1313 exit_conn_start:
1314         if (fw_ddb_entry)
1315                 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1316                                   fw_ddb_entry, fw_ddb_entry_dma);
1317         return ret;
1318 }
1319
1320 static void qla4xxx_conn_destroy(struct iscsi_cls_conn *cls_conn)
1321 {
1322         struct iscsi_cls_session *cls_sess = iscsi_conn_to_session(cls_conn);
1323         struct iscsi_session *sess;
1324         struct scsi_qla_host *ha;
1325         struct ddb_entry *ddb_entry;
1326         int options;
1327
1328         DEBUG2(printk(KERN_INFO "Func: %s\n", __func__));
1329         sess = cls_sess->dd_data;
1330         ddb_entry = sess->dd_data;
1331         ha = ddb_entry->ha;
1332
1333         options = LOGOUT_OPTION_CLOSE_SESSION;
1334         if (qla4xxx_session_logout_ddb(ha, ddb_entry, options) == QLA_ERROR)
1335                 ql4_printk(KERN_ERR, ha, "%s: Logout failed\n", __func__);
1336 }
1337
1338 static void qla4xxx_task_work(struct work_struct *wdata)
1339 {
1340         struct ql4_task_data *task_data;
1341         struct scsi_qla_host *ha;
1342         struct passthru_status *sts;
1343         struct iscsi_task *task;
1344         struct iscsi_hdr *hdr;
1345         uint8_t *data;
1346         uint32_t data_len;
1347         struct iscsi_conn *conn;
1348         int hdr_len;
1349         itt_t itt;
1350
1351         task_data = container_of(wdata, struct ql4_task_data, task_work);
1352         ha = task_data->ha;
1353         task = task_data->task;
1354         sts = &task_data->sts;
1355         hdr_len = sizeof(struct iscsi_hdr);
1356
1357         DEBUG3(printk(KERN_INFO "Status returned\n"));
1358         DEBUG3(qla4xxx_dump_buffer(sts, 64));
1359         DEBUG3(printk(KERN_INFO "Response buffer"));
1360         DEBUG3(qla4xxx_dump_buffer(task_data->resp_buffer, 64));
1361
1362         conn = task->conn;
1363
1364         switch (sts->completionStatus) {
1365         case PASSTHRU_STATUS_COMPLETE:
1366                 hdr = (struct iscsi_hdr *)task_data->resp_buffer;
1367                 /* Assign back the itt in hdr, until we use the PREASSIGN_TAG */
1368                 itt = sts->handle;
1369                 hdr->itt = itt;
1370                 data = task_data->resp_buffer + hdr_len;
1371                 data_len = task_data->resp_len - hdr_len;
1372                 iscsi_complete_pdu(conn, hdr, data, data_len);
1373                 break;
1374         default:
1375                 ql4_printk(KERN_ERR, ha, "Passthru failed status = 0x%x\n",
1376                            sts->completionStatus);
1377                 break;
1378         }
1379         return;
1380 }
1381
1382 static int qla4xxx_alloc_pdu(struct iscsi_task *task, uint8_t opcode)
1383 {
1384         struct ql4_task_data *task_data;
1385         struct iscsi_session *sess;
1386         struct ddb_entry *ddb_entry;
1387         struct scsi_qla_host *ha;
1388         int hdr_len;
1389
1390         sess = task->conn->session;
1391         ddb_entry = sess->dd_data;
1392         ha = ddb_entry->ha;
1393         task_data = task->dd_data;
1394         memset(task_data, 0, sizeof(struct ql4_task_data));
1395
1396         if (task->sc) {
1397                 ql4_printk(KERN_INFO, ha,
1398                            "%s: SCSI Commands not implemented\n", __func__);
1399                 return -EINVAL;
1400         }
1401
1402         hdr_len = sizeof(struct iscsi_hdr);
1403         task_data->ha = ha;
1404         task_data->task = task;
1405
1406         if (task->data_count) {
1407                 task_data->data_dma = dma_map_single(&ha->pdev->dev, task->data,
1408                                                      task->data_count,
1409                                                      PCI_DMA_TODEVICE);
1410         }
1411
1412         DEBUG2(ql4_printk(KERN_INFO, ha, "%s: MaxRecvLen %u, iscsi hrd %d\n",
1413                       __func__, task->conn->max_recv_dlength, hdr_len));
1414
1415         task_data->resp_len = task->conn->max_recv_dlength + hdr_len;
1416         task_data->resp_buffer = dma_alloc_coherent(&ha->pdev->dev,
1417                                                     task_data->resp_len,
1418                                                     &task_data->resp_dma,
1419                                                     GFP_ATOMIC);
1420         if (!task_data->resp_buffer)
1421                 goto exit_alloc_pdu;
1422
1423         task_data->req_len = task->data_count + hdr_len;
1424         task_data->req_buffer = dma_alloc_coherent(&ha->pdev->dev,
1425                                                    task_data->req_len,
1426                                                    &task_data->req_dma,
1427                                                    GFP_ATOMIC);
1428         if (!task_data->req_buffer)
1429                 goto exit_alloc_pdu;
1430
1431         task->hdr = task_data->req_buffer;
1432
1433         INIT_WORK(&task_data->task_work, qla4xxx_task_work);
1434
1435         return 0;
1436
1437 exit_alloc_pdu:
1438         if (task_data->resp_buffer)
1439                 dma_free_coherent(&ha->pdev->dev, task_data->resp_len,
1440                                   task_data->resp_buffer, task_data->resp_dma);
1441
1442         if (task_data->req_buffer)
1443                 dma_free_coherent(&ha->pdev->dev, task_data->req_len,
1444                                   task_data->req_buffer, task_data->req_dma);
1445         return -ENOMEM;
1446 }
1447
1448 static void qla4xxx_task_cleanup(struct iscsi_task *task)
1449 {
1450         struct ql4_task_data *task_data;
1451         struct iscsi_session *sess;
1452         struct ddb_entry *ddb_entry;
1453         struct scsi_qla_host *ha;
1454         int hdr_len;
1455
1456         hdr_len = sizeof(struct iscsi_hdr);
1457         sess = task->conn->session;
1458         ddb_entry = sess->dd_data;
1459         ha = ddb_entry->ha;
1460         task_data = task->dd_data;
1461
1462         if (task->data_count) {
1463                 dma_unmap_single(&ha->pdev->dev, task_data->data_dma,
1464                                  task->data_count, PCI_DMA_TODEVICE);
1465         }
1466
1467         DEBUG2(ql4_printk(KERN_INFO, ha, "%s: MaxRecvLen %u, iscsi hrd %d\n",
1468                       __func__, task->conn->max_recv_dlength, hdr_len));
1469
1470         dma_free_coherent(&ha->pdev->dev, task_data->resp_len,
1471                           task_data->resp_buffer, task_data->resp_dma);
1472         dma_free_coherent(&ha->pdev->dev, task_data->req_len,
1473                           task_data->req_buffer, task_data->req_dma);
1474         return;
1475 }
1476
1477 static int qla4xxx_task_xmit(struct iscsi_task *task)
1478 {
1479         struct scsi_cmnd *sc = task->sc;
1480         struct iscsi_session *sess = task->conn->session;
1481         struct ddb_entry *ddb_entry = sess->dd_data;
1482         struct scsi_qla_host *ha = ddb_entry->ha;
1483
1484         if (!sc)
1485                 return qla4xxx_send_passthru0(task);
1486
1487         ql4_printk(KERN_INFO, ha, "%s: scsi cmd xmit not implemented\n",
1488                    __func__);
1489         return -ENOSYS;
1490 }
1491
1492 static void qla4xxx_copy_fwddb_param(struct scsi_qla_host *ha,
1493                                      struct dev_db_entry *fw_ddb_entry,
1494                                      struct iscsi_cls_session *cls_sess,
1495                                      struct iscsi_cls_conn *cls_conn)
1496 {
1497         int buflen = 0;
1498         struct iscsi_session *sess;
1499         struct iscsi_conn *conn;
1500         char ip_addr[DDB_IPADDR_LEN];
1501         uint16_t options = 0;
1502
1503         sess = cls_sess->dd_data;
1504         conn = cls_conn->dd_data;
1505
1506         conn->max_recv_dlength = BYTE_UNITS *
1507                           le16_to_cpu(fw_ddb_entry->iscsi_max_rcv_data_seg_len);
1508
1509         conn->max_xmit_dlength = BYTE_UNITS *
1510                           le16_to_cpu(fw_ddb_entry->iscsi_max_snd_data_seg_len);
1511
1512         sess->initial_r2t_en =
1513                             (BIT_10 & le16_to_cpu(fw_ddb_entry->iscsi_options));
1514
1515         sess->max_r2t = le16_to_cpu(fw_ddb_entry->iscsi_max_outsnd_r2t);
1516
1517         sess->imm_data_en = (BIT_11 & le16_to_cpu(fw_ddb_entry->iscsi_options));
1518
1519         sess->first_burst = BYTE_UNITS *
1520                                le16_to_cpu(fw_ddb_entry->iscsi_first_burst_len);
1521
1522         sess->max_burst = BYTE_UNITS *
1523                                  le16_to_cpu(fw_ddb_entry->iscsi_max_burst_len);
1524
1525         sess->time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
1526
1527         sess->time2retain = le16_to_cpu(fw_ddb_entry->iscsi_def_time2retain);
1528
1529         conn->persistent_port = le16_to_cpu(fw_ddb_entry->port);
1530
1531         sess->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
1532
1533         options = le16_to_cpu(fw_ddb_entry->options);
1534         if (options & DDB_OPT_IPV6_DEVICE)
1535                 sprintf(ip_addr, "%pI6", fw_ddb_entry->ip_addr);
1536         else
1537                 sprintf(ip_addr, "%pI4", fw_ddb_entry->ip_addr);
1538
1539         iscsi_set_param(cls_conn, ISCSI_PARAM_TARGET_NAME,
1540                         (char *)fw_ddb_entry->iscsi_name, buflen);
1541         iscsi_set_param(cls_conn, ISCSI_PARAM_INITIATOR_NAME,
1542                         (char *)ha->name_string, buflen);
1543         iscsi_set_param(cls_conn, ISCSI_PARAM_PERSISTENT_ADDRESS,
1544                         (char *)ip_addr, buflen);
1545 }
1546
1547 void qla4xxx_update_session_conn_fwddb_param(struct scsi_qla_host *ha,
1548                                              struct ddb_entry *ddb_entry)
1549 {
1550         struct iscsi_cls_session *cls_sess;
1551         struct iscsi_cls_conn *cls_conn;
1552         uint32_t ddb_state;
1553         dma_addr_t fw_ddb_entry_dma;
1554         struct dev_db_entry *fw_ddb_entry;
1555
1556         fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1557                                           &fw_ddb_entry_dma, GFP_KERNEL);
1558         if (!fw_ddb_entry) {
1559                 ql4_printk(KERN_ERR, ha,
1560                            "%s: Unable to allocate dma buffer\n", __func__);
1561                 goto exit_session_conn_fwddb_param;
1562         }
1563
1564         if (qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index, fw_ddb_entry,
1565                                     fw_ddb_entry_dma, NULL, NULL, &ddb_state,
1566                                     NULL, NULL, NULL) == QLA_ERROR) {
1567                 DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
1568                                   "get_ddb_entry for fw_ddb_index %d\n",
1569                                   ha->host_no, __func__,
1570                                   ddb_entry->fw_ddb_index));
1571                 goto exit_session_conn_fwddb_param;
1572         }
1573
1574         cls_sess = ddb_entry->sess;
1575
1576         cls_conn = ddb_entry->conn;
1577
1578         /* Update params */
1579         qla4xxx_copy_fwddb_param(ha, fw_ddb_entry, cls_sess, cls_conn);
1580
1581 exit_session_conn_fwddb_param:
1582         if (fw_ddb_entry)
1583                 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1584                                   fw_ddb_entry, fw_ddb_entry_dma);
1585 }
1586
1587 void qla4xxx_update_session_conn_param(struct scsi_qla_host *ha,
1588                                        struct ddb_entry *ddb_entry)
1589 {
1590         struct iscsi_cls_session *cls_sess;
1591         struct iscsi_cls_conn *cls_conn;
1592         struct iscsi_session *sess;
1593         struct iscsi_conn *conn;
1594         uint32_t ddb_state;
1595         dma_addr_t fw_ddb_entry_dma;
1596         struct dev_db_entry *fw_ddb_entry;
1597
1598         fw_ddb_entry = dma_alloc_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1599                                           &fw_ddb_entry_dma, GFP_KERNEL);
1600         if (!fw_ddb_entry) {
1601                 ql4_printk(KERN_ERR, ha,
1602                            "%s: Unable to allocate dma buffer\n", __func__);
1603                 goto exit_session_conn_param;
1604         }
1605
1606         if (qla4xxx_get_fwddb_entry(ha, ddb_entry->fw_ddb_index, fw_ddb_entry,
1607                                     fw_ddb_entry_dma, NULL, NULL, &ddb_state,
1608                                     NULL, NULL, NULL) == QLA_ERROR) {
1609                 DEBUG2(ql4_printk(KERN_ERR, ha, "scsi%ld: %s: failed "
1610                                   "get_ddb_entry for fw_ddb_index %d\n",
1611                                   ha->host_no, __func__,
1612                                   ddb_entry->fw_ddb_index));
1613                 goto exit_session_conn_param;
1614         }
1615
1616         cls_sess = ddb_entry->sess;
1617         sess = cls_sess->dd_data;
1618
1619         cls_conn = ddb_entry->conn;
1620         conn = cls_conn->dd_data;
1621
1622         /* Update timers after login */
1623         ddb_entry->default_relogin_timeout =
1624                                 le16_to_cpu(fw_ddb_entry->def_timeout);
1625         ddb_entry->default_time2wait =
1626                                 le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
1627
1628         /* Update params */
1629         conn->max_recv_dlength = BYTE_UNITS *
1630                           le16_to_cpu(fw_ddb_entry->iscsi_max_rcv_data_seg_len);
1631
1632         conn->max_xmit_dlength = BYTE_UNITS *
1633                           le16_to_cpu(fw_ddb_entry->iscsi_max_snd_data_seg_len);
1634
1635         sess->initial_r2t_en =
1636                             (BIT_10 & le16_to_cpu(fw_ddb_entry->iscsi_options));
1637
1638         sess->max_r2t = le16_to_cpu(fw_ddb_entry->iscsi_max_outsnd_r2t);
1639
1640         sess->imm_data_en = (BIT_11 & le16_to_cpu(fw_ddb_entry->iscsi_options));
1641
1642         sess->first_burst = BYTE_UNITS *
1643                                le16_to_cpu(fw_ddb_entry->iscsi_first_burst_len);
1644
1645         sess->max_burst = BYTE_UNITS *
1646                                  le16_to_cpu(fw_ddb_entry->iscsi_max_burst_len);
1647
1648         sess->time2wait = le16_to_cpu(fw_ddb_entry->iscsi_def_time2wait);
1649
1650         sess->time2retain = le16_to_cpu(fw_ddb_entry->iscsi_def_time2retain);
1651
1652         sess->tpgt = le32_to_cpu(fw_ddb_entry->tgt_portal_grp);
1653
1654         memcpy(sess->initiatorname, ha->name_string,
1655                min(sizeof(ha->name_string), sizeof(sess->initiatorname)));
1656
1657 exit_session_conn_param:
1658         if (fw_ddb_entry)
1659                 dma_free_coherent(&ha->pdev->dev, sizeof(*fw_ddb_entry),
1660                                   fw_ddb_entry, fw_ddb_entry_dma);
1661 }
1662
1663 /*
1664  * Timer routines
1665  */
1666
1667 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
1668                                 unsigned long interval)
1669 {
1670         DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
1671                      __func__, ha->host->host_no));
1672         init_timer(&ha->timer);
1673         ha->timer.expires = jiffies + interval * HZ;
1674         ha->timer.data = (unsigned long)ha;
1675         ha->timer.function = (void (*)(unsigned long))func;
1676         add_timer(&ha->timer);
1677         ha->timer_active = 1;
1678 }
1679
1680 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
1681 {
1682         del_timer_sync(&ha->timer);
1683         ha->timer_active = 0;
1684 }
1685
1686 /***
1687  * qla4xxx_mark_device_missing - blocks the session
1688  * @cls_session: Pointer to the session to be blocked
1689  * @ddb_entry: Pointer to device database entry
1690  *
1691  * This routine marks a device missing and close connection.
1692  **/
1693 void qla4xxx_mark_device_missing(struct iscsi_cls_session *cls_session)
1694 {
1695         iscsi_block_session(cls_session);
1696 }
1697
1698 /**
1699  * qla4xxx_mark_all_devices_missing - mark all devices as missing.
1700  * @ha: Pointer to host adapter structure.
1701  *
1702  * This routine marks a device missing and resets the relogin retry count.
1703  **/
1704 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
1705 {
1706         iscsi_host_for_each_session(ha->host, qla4xxx_mark_device_missing);
1707 }
1708
1709 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
1710                                        struct ddb_entry *ddb_entry,
1711                                        struct scsi_cmnd *cmd)
1712 {
1713         struct srb *srb;
1714
1715         srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
1716         if (!srb)
1717                 return srb;
1718
1719         kref_init(&srb->srb_ref);
1720         srb->ha = ha;
1721         srb->ddb = ddb_entry;
1722         srb->cmd = cmd;
1723         srb->flags = 0;
1724         CMD_SP(cmd) = (void *)srb;
1725
1726         return srb;
1727 }
1728
1729 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
1730 {
1731         struct scsi_cmnd *cmd = srb->cmd;
1732
1733         if (srb->flags & SRB_DMA_VALID) {
1734                 scsi_dma_unmap(cmd);
1735                 srb->flags &= ~SRB_DMA_VALID;
1736         }
1737         CMD_SP(cmd) = NULL;
1738 }
1739
1740 void qla4xxx_srb_compl(struct kref *ref)
1741 {
1742         struct srb *srb = container_of(ref, struct srb, srb_ref);
1743         struct scsi_cmnd *cmd = srb->cmd;
1744         struct scsi_qla_host *ha = srb->ha;
1745
1746         qla4xxx_srb_free_dma(ha, srb);
1747
1748         mempool_free(srb, ha->srb_mempool);
1749
1750         cmd->scsi_done(cmd);
1751 }
1752
1753 /**
1754  * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
1755  * @host: scsi host
1756  * @cmd: Pointer to Linux's SCSI command structure
1757  *
1758  * Remarks:
1759  * This routine is invoked by Linux to send a SCSI command to the driver.
1760  * The mid-level driver tries to ensure that queuecommand never gets
1761  * invoked concurrently with itself or the interrupt handler (although
1762  * the interrupt handler may call this routine as part of request-
1763  * completion handling).   Unfortunely, it sometimes calls the scheduler
1764  * in interrupt context which is a big NO! NO!.
1765  **/
1766 static int qla4xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
1767 {
1768         struct scsi_qla_host *ha = to_qla_host(host);
1769         struct ddb_entry *ddb_entry = cmd->device->hostdata;
1770         struct iscsi_cls_session *sess = ddb_entry->sess;
1771         struct srb *srb;
1772         int rval;
1773
1774         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1775                 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
1776                         cmd->result = DID_NO_CONNECT << 16;
1777                 else
1778                         cmd->result = DID_REQUEUE << 16;
1779                 goto qc_fail_command;
1780         }
1781
1782         if (!sess) {
1783                 cmd->result = DID_IMM_RETRY << 16;
1784                 goto qc_fail_command;
1785         }
1786
1787         rval = iscsi_session_chkready(sess);
1788         if (rval) {
1789                 cmd->result = rval;
1790                 goto qc_fail_command;
1791         }
1792
1793         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1794             test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
1795             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1796             test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
1797             test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
1798             !test_bit(AF_ONLINE, &ha->flags) ||
1799             !test_bit(AF_LINK_UP, &ha->flags) ||
1800             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
1801                 goto qc_host_busy;
1802
1803         srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd);
1804         if (!srb)
1805                 goto qc_host_busy;
1806
1807         rval = qla4xxx_send_command_to_isp(ha, srb);
1808         if (rval != QLA_SUCCESS)
1809                 goto qc_host_busy_free_sp;
1810
1811         return 0;
1812
1813 qc_host_busy_free_sp:
1814         qla4xxx_srb_free_dma(ha, srb);
1815         mempool_free(srb, ha->srb_mempool);
1816
1817 qc_host_busy:
1818         return SCSI_MLQUEUE_HOST_BUSY;
1819
1820 qc_fail_command:
1821         cmd->scsi_done(cmd);
1822
1823         return 0;
1824 }
1825
1826 /**
1827  * qla4xxx_mem_free - frees memory allocated to adapter
1828  * @ha: Pointer to host adapter structure.
1829  *
1830  * Frees memory previously allocated by qla4xxx_mem_alloc
1831  **/
1832 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
1833 {
1834         if (ha->queues)
1835                 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
1836                                   ha->queues_dma);
1837
1838         ha->queues_len = 0;
1839         ha->queues = NULL;
1840         ha->queues_dma = 0;
1841         ha->request_ring = NULL;
1842         ha->request_dma = 0;
1843         ha->response_ring = NULL;
1844         ha->response_dma = 0;
1845         ha->shadow_regs = NULL;
1846         ha->shadow_regs_dma = 0;
1847
1848         /* Free srb pool. */
1849         if (ha->srb_mempool)
1850                 mempool_destroy(ha->srb_mempool);
1851
1852         ha->srb_mempool = NULL;
1853
1854         if (ha->chap_dma_pool)
1855                 dma_pool_destroy(ha->chap_dma_pool);
1856
1857         if (ha->chap_list)
1858                 vfree(ha->chap_list);
1859         ha->chap_list = NULL;
1860
1861         if (ha->fw_ddb_dma_pool)
1862                 dma_pool_destroy(ha->fw_ddb_dma_pool);
1863
1864         /* release io space registers  */
1865         if (is_qla8022(ha)) {
1866                 if (ha->nx_pcibase)
1867                         iounmap(
1868                             (struct device_reg_82xx __iomem *)ha->nx_pcibase);
1869         } else if (ha->reg)
1870                 iounmap(ha->reg);
1871         pci_release_regions(ha->pdev);
1872 }
1873
1874 /**
1875  * qla4xxx_mem_alloc - allocates memory for use by adapter.
1876  * @ha: Pointer to host adapter structure
1877  *
1878  * Allocates DMA memory for request and response queues. Also allocates memory
1879  * for srbs.
1880  **/
1881 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
1882 {
1883         unsigned long align;
1884
1885         /* Allocate contiguous block of DMA memory for queues. */
1886         ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
1887                           (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
1888                           sizeof(struct shadow_regs) +
1889                           MEM_ALIGN_VALUE +
1890                           (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
1891         ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
1892                                         &ha->queues_dma, GFP_KERNEL);
1893         if (ha->queues == NULL) {
1894                 ql4_printk(KERN_WARNING, ha,
1895                     "Memory Allocation failed - queues.\n");
1896
1897                 goto mem_alloc_error_exit;
1898         }
1899         memset(ha->queues, 0, ha->queues_len);
1900
1901         /*
1902          * As per RISC alignment requirements -- the bus-address must be a
1903          * multiple of the request-ring size (in bytes).
1904          */
1905         align = 0;
1906         if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
1907                 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
1908                                            (MEM_ALIGN_VALUE - 1));
1909
1910         /* Update request and response queue pointers. */
1911         ha->request_dma = ha->queues_dma + align;
1912         ha->request_ring = (struct queue_entry *) (ha->queues + align);
1913         ha->response_dma = ha->queues_dma + align +
1914                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
1915         ha->response_ring = (struct queue_entry *) (ha->queues + align +
1916                                                     (REQUEST_QUEUE_DEPTH *
1917                                                      QUEUE_SIZE));
1918         ha->shadow_regs_dma = ha->queues_dma + align +
1919                 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
1920                 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
1921         ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
1922                                                   (REQUEST_QUEUE_DEPTH *
1923                                                    QUEUE_SIZE) +
1924                                                   (RESPONSE_QUEUE_DEPTH *
1925                                                    QUEUE_SIZE));
1926
1927         /* Allocate memory for srb pool. */
1928         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1929                                          mempool_free_slab, srb_cachep);
1930         if (ha->srb_mempool == NULL) {
1931                 ql4_printk(KERN_WARNING, ha,
1932                     "Memory Allocation failed - SRB Pool.\n");
1933
1934                 goto mem_alloc_error_exit;
1935         }
1936
1937         ha->chap_dma_pool = dma_pool_create("ql4_chap", &ha->pdev->dev,
1938                                             CHAP_DMA_BLOCK_SIZE, 8, 0);
1939
1940         if (ha->chap_dma_pool == NULL) {
1941                 ql4_printk(KERN_WARNING, ha,
1942                     "%s: chap_dma_pool allocation failed..\n", __func__);
1943                 goto mem_alloc_error_exit;
1944         }
1945
1946         ha->fw_ddb_dma_pool = dma_pool_create("ql4_fw_ddb", &ha->pdev->dev,
1947                                               DDB_DMA_BLOCK_SIZE, 8, 0);
1948
1949         if (ha->fw_ddb_dma_pool == NULL) {
1950                 ql4_printk(KERN_WARNING, ha,
1951                            "%s: fw_ddb_dma_pool allocation failed..\n",
1952                            __func__);
1953                 goto mem_alloc_error_exit;
1954         }
1955
1956         return QLA_SUCCESS;
1957
1958 mem_alloc_error_exit:
1959         qla4xxx_mem_free(ha);
1960         return QLA_ERROR;
1961 }
1962
1963 /**
1964  * qla4_8xxx_check_fw_alive  - Check firmware health
1965  * @ha: Pointer to host adapter structure.
1966  *
1967  * Context: Interrupt
1968  **/
1969 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
1970 {
1971         uint32_t fw_heartbeat_counter, halt_status;
1972
1973         fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
1974         /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
1975         if (fw_heartbeat_counter == 0xffffffff) {
1976                 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
1977                     "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
1978                     ha->host_no, __func__));
1979                 return;
1980         }
1981
1982         if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
1983                 ha->seconds_since_last_heartbeat++;
1984                 /* FW not alive after 2 seconds */
1985                 if (ha->seconds_since_last_heartbeat == 2) {
1986                         ha->seconds_since_last_heartbeat = 0;
1987                         halt_status = qla4_8xxx_rd_32(ha,
1988                                                       QLA82XX_PEG_HALT_STATUS1);
1989
1990                         ql4_printk(KERN_INFO, ha,
1991                                    "scsi(%ld): %s, Dumping hw/fw registers:\n "
1992                                    " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2:"
1993                                    " 0x%x,\n PEG_NET_0_PC: 0x%x, PEG_NET_1_PC:"
1994                                    " 0x%x,\n PEG_NET_2_PC: 0x%x, PEG_NET_3_PC:"
1995                                    " 0x%x,\n PEG_NET_4_PC: 0x%x\n",
1996                                    ha->host_no, __func__, halt_status,
1997                                    qla4_8xxx_rd_32(ha,
1998                                                    QLA82XX_PEG_HALT_STATUS2),
1999                                    qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_0 +
2000                                                    0x3c),
2001                                    qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_1 +
2002                                                    0x3c),
2003                                    qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_2 +
2004                                                    0x3c),
2005                                    qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_3 +
2006                                                    0x3c),
2007                                    qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 +
2008                                                    0x3c));
2009
2010                         /* Since we cannot change dev_state in interrupt
2011                          * context, set appropriate DPC flag then wakeup
2012                          * DPC */
2013                         if (halt_status & HALT_STATUS_UNRECOVERABLE)
2014                                 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
2015                         else {
2016                                 printk("scsi%ld: %s: detect abort needed!\n",
2017                                     ha->host_no, __func__);
2018                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2019                         }
2020                         qla4xxx_wake_dpc(ha);
2021                         qla4xxx_mailbox_premature_completion(ha);
2022                 }
2023         } else
2024                 ha->seconds_since_last_heartbeat = 0;
2025
2026         ha->fw_heartbeat_counter = fw_heartbeat_counter;
2027 }
2028
2029 /**
2030  * qla4_8xxx_watchdog - Poll dev state
2031  * @ha: Pointer to host adapter structure.
2032  *
2033  * Context: Interrupt
2034  **/
2035 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
2036 {
2037         uint32_t dev_state;
2038
2039         dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
2040
2041         /* don't poll if reset is going on */
2042         if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
2043             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
2044             test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags))) {
2045                 if (dev_state == QLA82XX_DEV_NEED_RESET &&
2046                     !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2047                         if (!ql4xdontresethba) {
2048                                 ql4_printk(KERN_INFO, ha, "%s: HW State: "
2049                                     "NEED RESET!\n", __func__);
2050                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2051                                 qla4xxx_wake_dpc(ha);
2052                                 qla4xxx_mailbox_premature_completion(ha);
2053                         }
2054                 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
2055                     !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
2056                         ql4_printk(KERN_INFO, ha, "%s: HW State: NEED QUIES!\n",
2057                             __func__);
2058                         set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
2059                         qla4xxx_wake_dpc(ha);
2060                 } else  {
2061                         /* Check firmware health */
2062                         qla4_8xxx_check_fw_alive(ha);
2063                 }
2064         }
2065 }
2066
2067 void qla4xxx_check_relogin_flash_ddb(struct iscsi_cls_session *cls_sess)
2068 {
2069         struct iscsi_session *sess;
2070         struct ddb_entry *ddb_entry;
2071         struct scsi_qla_host *ha;
2072
2073         sess = cls_sess->dd_data;
2074         ddb_entry = sess->dd_data;
2075         ha = ddb_entry->ha;
2076
2077         if (!(ddb_entry->ddb_type == FLASH_DDB))
2078                 return;
2079
2080         if (adapter_up(ha) && !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
2081             !iscsi_is_session_online(cls_sess)) {
2082                 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
2083                     INVALID_ENTRY) {
2084                         if (atomic_read(&ddb_entry->retry_relogin_timer) ==
2085                                         0) {
2086                                 atomic_set(&ddb_entry->retry_relogin_timer,
2087                                            INVALID_ENTRY);
2088                                 set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags);
2089                                 set_bit(DF_RELOGIN, &ddb_entry->flags);
2090                                 DEBUG2(ql4_printk(KERN_INFO, ha,
2091                                        "%s: index [%d] login device\n",
2092                                         __func__, ddb_entry->fw_ddb_index));
2093                         } else
2094                                 atomic_dec(&ddb_entry->retry_relogin_timer);
2095                 }
2096         }
2097
2098         /* Wait for relogin to timeout */
2099         if (atomic_read(&ddb_entry->relogin_timer) &&
2100             (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
2101                 /*
2102                  * If the relogin times out and the device is
2103                  * still NOT ONLINE then try and relogin again.
2104                  */
2105                 if (!iscsi_is_session_online(cls_sess)) {
2106                         /* Reset retry relogin timer */
2107                         atomic_inc(&ddb_entry->relogin_retry_count);
2108                         DEBUG2(ql4_printk(KERN_INFO, ha,
2109                                 "%s: index[%d] relogin timed out-retrying"
2110                                 " relogin (%d), retry (%d)\n", __func__,
2111                                 ddb_entry->fw_ddb_index,
2112                                 atomic_read(&ddb_entry->relogin_retry_count),
2113                                 ddb_entry->default_time2wait + 4));
2114                         set_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags);
2115                         atomic_set(&ddb_entry->retry_relogin_timer,
2116                                    ddb_entry->default_time2wait + 4);
2117                 }
2118         }
2119 }
2120
2121 /**
2122  * qla4xxx_timer - checks every second for work to do.
2123  * @ha: Pointer to host adapter structure.
2124  **/
2125 static void qla4xxx_timer(struct scsi_qla_host *ha)
2126 {
2127         int start_dpc = 0;
2128         uint16_t w;
2129
2130         iscsi_host_for_each_session(ha->host, qla4xxx_check_relogin_flash_ddb);
2131
2132         /* If we are in the middle of AER/EEH processing
2133          * skip any processing and reschedule the timer
2134          */
2135         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
2136                 mod_timer(&ha->timer, jiffies + HZ);
2137                 return;
2138         }
2139
2140         /* Hardware read to trigger an EEH error during mailbox waits. */
2141         if (!pci_channel_offline(ha->pdev))
2142                 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
2143
2144         if (is_qla8022(ha)) {
2145                 qla4_8xxx_watchdog(ha);
2146         }
2147
2148         if (!is_qla8022(ha)) {
2149                 /* Check for heartbeat interval. */
2150                 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
2151                     ha->heartbeat_interval != 0) {
2152                         ha->seconds_since_last_heartbeat++;
2153                         if (ha->seconds_since_last_heartbeat >
2154                             ha->heartbeat_interval + 2)
2155                                 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2156                 }
2157         }
2158
2159         /* Wakeup the dpc routine for this adapter, if needed. */
2160         if (start_dpc ||
2161              test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
2162              test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
2163              test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
2164              test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
2165              test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
2166              test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
2167              test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
2168              test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
2169              test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
2170              test_bit(DPC_AEN, &ha->dpc_flags)) {
2171                 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
2172                               " - dpc flags = 0x%lx\n",
2173                               ha->host_no, __func__, ha->dpc_flags));
2174                 qla4xxx_wake_dpc(ha);
2175         }
2176
2177         /* Reschedule timer thread to call us back in one second */
2178         mod_timer(&ha->timer, jiffies + HZ);
2179
2180         DEBUG2(ha->seconds_since_last_intr++);
2181 }
2182
2183 /**
2184  * qla4xxx_cmd_wait - waits for all outstanding commands to complete
2185  * @ha: Pointer to host adapter structure.
2186  *
2187  * This routine stalls the driver until all outstanding commands are returned.
2188  * Caller must release the Hardware Lock prior to calling this routine.
2189  **/
2190 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
2191 {
2192         uint32_t index = 0;
2193         unsigned long flags;
2194         struct scsi_cmnd *cmd;
2195
2196         unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
2197
2198         DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
2199             "complete\n", WAIT_CMD_TOV));
2200
2201         while (!time_after_eq(jiffies, wtime)) {
2202                 spin_lock_irqsave(&ha->hardware_lock, flags);
2203                 /* Find a command that hasn't completed. */
2204                 for (index = 0; index < ha->host->can_queue; index++) {
2205                         cmd = scsi_host_find_tag(ha->host, index);
2206                         /*
2207                          * We cannot just check if the index is valid,
2208                          * becase if we are run from the scsi eh, then
2209                          * the scsi/block layer is going to prevent
2210                          * the tag from being released.
2211                          */
2212                         if (cmd != NULL && CMD_SP(cmd))
2213                                 break;
2214                 }
2215                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2216
2217                 /* If No Commands are pending, wait is complete */
2218                 if (index == ha->host->can_queue)
2219                         return QLA_SUCCESS;
2220
2221                 msleep(1000);
2222         }
2223         /* If we timed out on waiting for commands to come back
2224          * return ERROR. */
2225         return QLA_ERROR;
2226 }
2227
2228 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
2229 {
2230         uint32_t ctrl_status;
2231         unsigned long flags = 0;
2232
2233         DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
2234
2235         if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
2236                 return QLA_ERROR;
2237
2238         spin_lock_irqsave(&ha->hardware_lock, flags);
2239
2240         /*
2241          * If the SCSI Reset Interrupt bit is set, clear it.
2242          * Otherwise, the Soft Reset won't work.
2243          */
2244         ctrl_status = readw(&ha->reg->ctrl_status);
2245         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
2246                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
2247
2248         /* Issue Soft Reset */
2249         writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
2250         readl(&ha->reg->ctrl_status);
2251
2252         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2253         return QLA_SUCCESS;
2254 }
2255
2256 /**
2257  * qla4xxx_soft_reset - performs soft reset.
2258  * @ha: Pointer to host adapter structure.
2259  **/
2260 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
2261 {
2262         uint32_t max_wait_time;
2263         unsigned long flags = 0;
2264         int status;
2265         uint32_t ctrl_status;
2266
2267         status = qla4xxx_hw_reset(ha);
2268         if (status != QLA_SUCCESS)
2269                 return status;
2270
2271         status = QLA_ERROR;
2272         /* Wait until the Network Reset Intr bit is cleared */
2273         max_wait_time = RESET_INTR_TOV;
2274         do {
2275                 spin_lock_irqsave(&ha->hardware_lock, flags);
2276                 ctrl_status = readw(&ha->reg->ctrl_status);
2277                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2278
2279                 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
2280                         break;
2281
2282                 msleep(1000);
2283         } while ((--max_wait_time));
2284
2285         if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
2286                 DEBUG2(printk(KERN_WARNING
2287                               "scsi%ld: Network Reset Intr not cleared by "
2288                               "Network function, clearing it now!\n",
2289                               ha->host_no));
2290                 spin_lock_irqsave(&ha->hardware_lock, flags);
2291                 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
2292                 readl(&ha->reg->ctrl_status);
2293                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2294         }
2295
2296         /* Wait until the firmware tells us the Soft Reset is done */
2297         max_wait_time = SOFT_RESET_TOV;
2298         do {
2299                 spin_lock_irqsave(&ha->hardware_lock, flags);
2300                 ctrl_status = readw(&ha->reg->ctrl_status);
2301                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2302
2303                 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
2304                         status = QLA_SUCCESS;
2305                         break;
2306                 }
2307
2308                 msleep(1000);
2309         } while ((--max_wait_time));
2310
2311         /*
2312          * Also, make sure that the SCSI Reset Interrupt bit has been cleared
2313          * after the soft reset has taken place.
2314          */
2315         spin_lock_irqsave(&ha->hardware_lock, flags);
2316         ctrl_status = readw(&ha->reg->ctrl_status);
2317         if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
2318                 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
2319                 readl(&ha->reg->ctrl_status);
2320         }
2321         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2322
2323         /* If soft reset fails then most probably the bios on other
2324          * function is also enabled.
2325          * Since the initialization is sequential the other fn
2326          * wont be able to acknowledge the soft reset.
2327          * Issue a force soft reset to workaround this scenario.
2328          */
2329         if (max_wait_time == 0) {
2330                 /* Issue Force Soft Reset */
2331                 spin_lock_irqsave(&ha->hardware_lock, flags);
2332                 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
2333                 readl(&ha->reg->ctrl_status);
2334                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2335                 /* Wait until the firmware tells us the Soft Reset is done */
2336                 max_wait_time = SOFT_RESET_TOV;
2337                 do {
2338                         spin_lock_irqsave(&ha->hardware_lock, flags);
2339                         ctrl_status = readw(&ha->reg->ctrl_status);
2340                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2341
2342                         if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
2343                                 status = QLA_SUCCESS;
2344                                 break;
2345                         }
2346
2347                         msleep(1000);
2348                 } while ((--max_wait_time));
2349         }
2350
2351         return status;
2352 }
2353
2354 /**
2355  * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
2356  * @ha: Pointer to host adapter structure.
2357  * @res: returned scsi status
2358  *
2359  * This routine is called just prior to a HARD RESET to return all
2360  * outstanding commands back to the Operating System.
2361  * Caller should make sure that the following locks are released
2362  * before this calling routine: Hardware lock, and io_request_lock.
2363  **/
2364 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
2365 {
2366         struct srb *srb;
2367         int i;
2368         unsigned long flags;
2369
2370         spin_lock_irqsave(&ha->hardware_lock, flags);
2371         for (i = 0; i < ha->host->can_queue; i++) {
2372                 srb = qla4xxx_del_from_active_array(ha, i);
2373                 if (srb != NULL) {
2374                         srb->cmd->result = res;
2375                         kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2376                 }
2377         }
2378         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2379 }
2380
2381 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
2382 {
2383         clear_bit(AF_ONLINE, &ha->flags);
2384
2385         /* Disable the board */
2386         ql4_printk(KERN_INFO, ha, "Disabling the board\n");
2387
2388         qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2389         qla4xxx_mark_all_devices_missing(ha);
2390         clear_bit(AF_INIT_DONE, &ha->flags);
2391 }
2392
2393 static void qla4xxx_fail_session(struct iscsi_cls_session *cls_session)
2394 {
2395         struct iscsi_session *sess;
2396         struct ddb_entry *ddb_entry;
2397
2398         sess = cls_session->dd_data;
2399         ddb_entry = sess->dd_data;
2400         ddb_entry->fw_ddb_device_state = DDB_DS_SESSION_FAILED;
2401
2402         if (ddb_entry->ddb_type == FLASH_DDB)
2403                 iscsi_block_session(ddb_entry->sess);
2404         else
2405                 iscsi_session_failure(cls_session->dd_data,
2406                                       ISCSI_ERR_CONN_FAILED);
2407 }
2408
2409 /**
2410  * qla4xxx_recover_adapter - recovers adapter after a fatal error
2411  * @ha: Pointer to host adapter structure.
2412  **/
2413 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
2414 {
2415         int status = QLA_ERROR;
2416         uint8_t reset_chip = 0;
2417
2418         /* Stall incoming I/O until we are done */
2419         scsi_block_requests(ha->host);
2420         clear_bit(AF_ONLINE, &ha->flags);
2421         clear_bit(AF_LINK_UP, &ha->flags);
2422
2423         DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
2424
2425         set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2426
2427         iscsi_host_for_each_session(ha->host, qla4xxx_fail_session);
2428
2429         if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
2430                 reset_chip = 1;
2431
2432         /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
2433          * do not reset adapter, jump to initialize_adapter */
2434         if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
2435                 status = QLA_SUCCESS;
2436                 goto recover_ha_init_adapter;
2437         }
2438
2439         /* For the ISP-82xx adapter, issue a stop_firmware if invoked
2440          * from eh_host_reset or ioctl module */
2441         if (is_qla8022(ha) && !reset_chip &&
2442             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
2443
2444                 DEBUG2(ql4_printk(KERN_INFO, ha,
2445                     "scsi%ld: %s - Performing stop_firmware...\n",
2446                     ha->host_no, __func__));
2447                 status = ha->isp_ops->reset_firmware(ha);
2448                 if (status == QLA_SUCCESS) {
2449                         if (!test_bit(AF_FW_RECOVERY, &ha->flags))
2450                                 qla4xxx_cmd_wait(ha);
2451                         ha->isp_ops->disable_intrs(ha);
2452                         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2453                         qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2454                 } else {
2455                         /* If the stop_firmware fails then
2456                          * reset the entire chip */
2457                         reset_chip = 1;
2458                         clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2459                         set_bit(DPC_RESET_HA, &ha->dpc_flags);
2460                 }
2461         }
2462
2463         /* Issue full chip reset if recovering from a catastrophic error,
2464          * or if stop_firmware fails for ISP-82xx.
2465          * This is the default case for ISP-4xxx */
2466         if (!is_qla8022(ha) || reset_chip) {
2467                 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
2468                         qla4xxx_cmd_wait(ha);
2469                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2470                 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2471                 DEBUG2(ql4_printk(KERN_INFO, ha,
2472                     "scsi%ld: %s - Performing chip reset..\n",
2473                     ha->host_no, __func__));
2474                 status = ha->isp_ops->reset_chip(ha);
2475         }
2476
2477         /* Flush any pending ddb changed AENs */
2478         qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2479
2480 recover_ha_init_adapter:
2481         /* Upon successful firmware/chip reset, re-initialize the adapter */
2482         if (status == QLA_SUCCESS) {
2483                 /* For ISP-4xxx, force function 1 to always initialize
2484                  * before function 3 to prevent both funcions from
2485                  * stepping on top of the other */
2486                 if (!is_qla8022(ha) && (ha->mac_index == 3))
2487                         ssleep(6);
2488
2489                 /* NOTE: AF_ONLINE flag set upon successful completion of
2490                  *       qla4xxx_initialize_adapter */
2491                 status = qla4xxx_initialize_adapter(ha, RESET_ADAPTER);
2492         }
2493
2494         /* Retry failed adapter initialization, if necessary
2495          * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
2496          * case to prevent ping-pong resets between functions */
2497         if (!test_bit(AF_ONLINE, &ha->flags) &&
2498             !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
2499                 /* Adapter initialization failed, see if we can retry
2500                  * resetting the ha.
2501                  * Since we don't want to block the DPC for too long
2502                  * with multiple resets in the same thread,
2503                  * utilize DPC to retry */
2504                 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
2505                         ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
2506                         DEBUG2(printk("scsi%ld: recover adapter - retrying "
2507                                       "(%d) more times\n", ha->host_no,
2508                                       ha->retry_reset_ha_cnt));
2509                         set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
2510                         status = QLA_ERROR;
2511                 } else {
2512                         if (ha->retry_reset_ha_cnt > 0) {
2513                                 /* Schedule another Reset HA--DPC will retry */
2514                                 ha->retry_reset_ha_cnt--;
2515                                 DEBUG2(printk("scsi%ld: recover adapter - "
2516                                               "retry remaining %d\n",
2517                                               ha->host_no,
2518                                               ha->retry_reset_ha_cnt));
2519                                 status = QLA_ERROR;
2520                         }
2521
2522                         if (ha->retry_reset_ha_cnt == 0) {
2523                                 /* Recover adapter retries have been exhausted.
2524                                  * Adapter DEAD */
2525                                 DEBUG2(printk("scsi%ld: recover adapter "
2526                                               "failed - board disabled\n",
2527                                               ha->host_no));
2528                                 qla4xxx_dead_adapter_cleanup(ha);
2529                                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
2530                                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
2531                                 clear_bit(DPC_RESET_HA_FW_CONTEXT,
2532                                           &ha->dpc_flags);
2533                                 status = QLA_ERROR;
2534                         }
2535                 }
2536         } else {
2537                 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
2538                 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2539                 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
2540         }
2541
2542         ha->adapter_error_count++;
2543
2544         if (test_bit(AF_ONLINE, &ha->flags))
2545                 ha->isp_ops->enable_intrs(ha);
2546
2547         scsi_unblock_requests(ha->host);
2548
2549         clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2550         DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
2551             status == QLA_ERROR ? "FAILED" : "SUCCEEDED"));
2552
2553         return status;
2554 }
2555
2556 static void qla4xxx_relogin_devices(struct iscsi_cls_session *cls_session)
2557 {
2558         struct iscsi_session *sess;
2559         struct ddb_entry *ddb_entry;
2560         struct scsi_qla_host *ha;
2561
2562         sess = cls_session->dd_data;
2563         ddb_entry = sess->dd_data;
2564         ha = ddb_entry->ha;
2565         if (!iscsi_is_session_online(cls_session)) {
2566                 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) {
2567                         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
2568                                    " unblock session\n", ha->host_no, __func__,
2569                                    ddb_entry->fw_ddb_index);
2570                         iscsi_unblock_session(ddb_entry->sess);
2571                 } else {
2572                         /* Trigger relogin */
2573                         if (ddb_entry->ddb_type == FLASH_DDB) {
2574                                 if (!test_bit(DF_RELOGIN, &ddb_entry->flags))
2575                                         qla4xxx_arm_relogin_timer(ddb_entry);
2576                         } else
2577                                 iscsi_session_failure(cls_session->dd_data,
2578                                                       ISCSI_ERR_CONN_FAILED);
2579                 }
2580         }
2581 }
2582
2583 int qla4xxx_unblock_flash_ddb(struct iscsi_cls_session *cls_session)
2584 {
2585         struct iscsi_session *sess;
2586         struct ddb_entry *ddb_entry;
2587         struct scsi_qla_host *ha;
2588
2589         sess = cls_session->dd_data;
2590         ddb_entry = sess->dd_data;
2591         ha = ddb_entry->ha;
2592         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
2593                    " unblock session\n", ha->host_no, __func__,
2594                    ddb_entry->fw_ddb_index);
2595
2596         iscsi_unblock_session(ddb_entry->sess);
2597
2598         /* Start scan target */
2599         if (test_bit(AF_ONLINE, &ha->flags)) {
2600                 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
2601                            " start scan\n", ha->host_no, __func__,
2602                            ddb_entry->fw_ddb_index);
2603                 scsi_queue_work(ha->host, &ddb_entry->sess->scan_work);
2604         }
2605         return QLA_SUCCESS;
2606 }
2607
2608 int qla4xxx_unblock_ddb(struct iscsi_cls_session *cls_session)
2609 {
2610         struct iscsi_session *sess;
2611         struct ddb_entry *ddb_entry;
2612         struct scsi_qla_host *ha;
2613
2614         sess = cls_session->dd_data;
2615         ddb_entry = sess->dd_data;
2616         ha = ddb_entry->ha;
2617         ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
2618                    " unblock user space session\n", ha->host_no, __func__,
2619                    ddb_entry->fw_ddb_index);
2620         iscsi_conn_start(ddb_entry->conn);
2621         iscsi_conn_login_event(ddb_entry->conn,
2622                                ISCSI_CONN_STATE_LOGGED_IN);
2623
2624         return QLA_SUCCESS;
2625 }
2626
2627 static void qla4xxx_relogin_all_devices(struct scsi_qla_host *ha)
2628 {
2629         iscsi_host_for_each_session(ha->host, qla4xxx_relogin_devices);
2630 }
2631
2632 static void qla4xxx_relogin_flash_ddb(struct iscsi_cls_session *cls_sess)
2633 {
2634         uint16_t relogin_timer;
2635         struct iscsi_session *sess;
2636         struct ddb_entry *ddb_entry;
2637         struct scsi_qla_host *ha;
2638
2639         sess = cls_sess->dd_data;
2640         ddb_entry = sess->dd_data;
2641         ha = ddb_entry->ha;
2642
2643         relogin_timer = max(ddb_entry->default_relogin_timeout,
2644                             (uint16_t)RELOGIN_TOV);
2645         atomic_set(&ddb_entry->relogin_timer, relogin_timer);
2646
2647         DEBUG2(ql4_printk(KERN_INFO, ha,
2648                           "scsi%ld: Relogin index [%d]. TOV=%d\n", ha->host_no,
2649                           ddb_entry->fw_ddb_index, relogin_timer));
2650
2651         qla4xxx_login_flash_ddb(cls_sess);
2652 }
2653
2654 static void qla4xxx_dpc_relogin(struct iscsi_cls_session *cls_sess)
2655 {
2656         struct iscsi_session *sess;
2657         struct ddb_entry *ddb_entry;
2658         struct scsi_qla_host *ha;
2659
2660         sess = cls_sess->dd_data;
2661         ddb_entry = sess->dd_data;
2662         ha = ddb_entry->ha;
2663
2664         if (!(ddb_entry->ddb_type == FLASH_DDB))
2665                 return;
2666
2667         if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
2668             !iscsi_is_session_online(cls_sess)) {
2669                 DEBUG2(ql4_printk(KERN_INFO, ha,
2670                                   "relogin issued\n"));
2671                 qla4xxx_relogin_flash_ddb(cls_sess);
2672         }
2673 }
2674
2675 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
2676 {
2677         if (ha->dpc_thread)
2678                 queue_work(ha->dpc_thread, &ha->dpc_work);
2679 }
2680
2681 /**
2682  * qla4xxx_do_dpc - dpc routine
2683  * @data: in our case pointer to adapter structure
2684  *
2685  * This routine is a task that is schedule by the interrupt handler
2686  * to perform the background processing for interrupts.  We put it
2687  * on a task queue that is consumed whenever the scheduler runs; that's
2688  * so you can do anything (i.e. put the process to sleep etc).  In fact,
2689  * the mid-level tries to sleep when it reaches the driver threshold
2690  * "host->can_queue". This can cause a panic if we were in our interrupt code.
2691  **/
2692 static void qla4xxx_do_dpc(struct work_struct *work)
2693 {
2694         struct scsi_qla_host *ha =
2695                 container_of(work, struct scsi_qla_host, dpc_work);
2696         int status = QLA_ERROR;
2697
2698         DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
2699             "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
2700             ha->host_no, __func__, ha->flags, ha->dpc_flags))
2701
2702         /* Initialization not yet finished. Don't do anything yet. */
2703         if (!test_bit(AF_INIT_DONE, &ha->flags))
2704                 return;
2705
2706         if (test_bit(AF_EEH_BUSY, &ha->flags)) {
2707                 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
2708                     ha->host_no, __func__, ha->flags));
2709                 return;
2710         }
2711
2712         if (is_qla8022(ha)) {
2713                 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
2714                         qla4_8xxx_idc_lock(ha);
2715                         qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2716                             QLA82XX_DEV_FAILED);
2717                         qla4_8xxx_idc_unlock(ha);
2718                         ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
2719                         qla4_8xxx_device_state_handler(ha);
2720                 }
2721                 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
2722                         qla4_8xxx_need_qsnt_handler(ha);
2723                 }
2724         }
2725
2726         if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
2727             (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
2728             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
2729             test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
2730                 if (ql4xdontresethba) {
2731                         DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2732                             ha->host_no, __func__));
2733                         clear_bit(DPC_RESET_HA, &ha->dpc_flags);
2734                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
2735                         clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2736                         goto dpc_post_reset_ha;
2737                 }
2738                 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
2739                     test_bit(DPC_RESET_HA, &ha->dpc_flags))
2740                         qla4xxx_recover_adapter(ha);
2741
2742                 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
2743                         uint8_t wait_time = RESET_INTR_TOV;
2744
2745                         while ((readw(&ha->reg->ctrl_status) &
2746                                 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
2747                                 if (--wait_time == 0)
2748                                         break;
2749                                 msleep(1000);
2750                         }
2751                         if (wait_time == 0)
2752                                 DEBUG2(printk("scsi%ld: %s: SR|FSR "
2753                                               "bit not cleared-- resetting\n",
2754                                               ha->host_no, __func__));
2755                         qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2756                         if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
2757                                 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2758                                 status = qla4xxx_recover_adapter(ha);
2759                         }
2760                         clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
2761                         if (status == QLA_SUCCESS)
2762                                 ha->isp_ops->enable_intrs(ha);
2763                 }
2764         }
2765
2766 dpc_post_reset_ha:
2767         /* ---- process AEN? --- */
2768         if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
2769                 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
2770
2771         /* ---- Get DHCP IP Address? --- */
2772         if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
2773                 qla4xxx_get_dhcp_ip_address(ha);
2774
2775         /* ---- relogin device? --- */
2776         if (adapter_up(ha) &&
2777             test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
2778                 iscsi_host_for_each_session(ha->host, qla4xxx_dpc_relogin);
2779         }
2780
2781         /* ---- link change? --- */
2782         if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
2783                 if (!test_bit(AF_LINK_UP, &ha->flags)) {
2784                         /* ---- link down? --- */
2785                         qla4xxx_mark_all_devices_missing(ha);
2786                 } else {
2787                         /* ---- link up? --- *
2788                          * F/W will auto login to all devices ONLY ONCE after
2789                          * link up during driver initialization and runtime
2790                          * fatal error recovery.  Therefore, the driver must
2791                          * manually relogin to devices when recovering from
2792                          * connection failures, logouts, expired KATO, etc. */
2793                         if (test_and_clear_bit(AF_BUILD_DDB_LIST, &ha->flags)) {
2794                                 qla4xxx_build_ddb_list(ha, ha->is_reset);
2795                                 iscsi_host_for_each_session(ha->host,
2796                                                 qla4xxx_login_flash_ddb);
2797                         } else
2798                                 qla4xxx_relogin_all_devices(ha);
2799                 }
2800         }
2801 }
2802
2803 /**
2804  * qla4xxx_free_adapter - release the adapter
2805  * @ha: pointer to adapter structure
2806  **/
2807 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
2808 {
2809
2810         if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
2811                 /* Turn-off interrupts on the card. */
2812                 ha->isp_ops->disable_intrs(ha);
2813         }
2814
2815         /* Remove timer thread, if present */
2816         if (ha->timer_active)
2817                 qla4xxx_stop_timer(ha);
2818
2819         /* Kill the kernel thread for this host */
2820         if (ha->dpc_thread)
2821                 destroy_workqueue(ha->dpc_thread);
2822
2823         /* Kill the kernel thread for this host */
2824         if (ha->task_wq)
2825                 destroy_workqueue(ha->task_wq);
2826
2827         /* Put firmware in known state */
2828         ha->isp_ops->reset_firmware(ha);
2829
2830         if (is_qla8022(ha)) {
2831                 qla4_8xxx_idc_lock(ha);
2832                 qla4_8xxx_clear_drv_active(ha);
2833                 qla4_8xxx_idc_unlock(ha);
2834         }
2835
2836         /* Detach interrupts */
2837         if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
2838                 qla4xxx_free_irqs(ha);
2839
2840         /* free extra memory */
2841         qla4xxx_mem_free(ha);
2842 }
2843
2844 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
2845 {
2846         int status = 0;
2847         uint8_t revision_id;
2848         unsigned long mem_base, mem_len, db_base, db_len;
2849         struct pci_dev *pdev = ha->pdev;
2850
2851         status = pci_request_regions(pdev, DRIVER_NAME);
2852         if (status) {
2853                 printk(KERN_WARNING
2854                     "scsi(%ld) Failed to reserve PIO regions (%s) "
2855                     "status=%d\n", ha->host_no, pci_name(pdev), status);
2856                 goto iospace_error_exit;
2857         }
2858
2859         pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
2860         DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
2861             __func__, revision_id));
2862         ha->revision_id = revision_id;
2863
2864         /* remap phys address */
2865         mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
2866         mem_len = pci_resource_len(pdev, 0);
2867         DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
2868             __func__, mem_base, mem_len));
2869
2870         /* mapping of pcibase pointer */
2871         ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
2872         if (!ha->nx_pcibase) {
2873                 printk(KERN_ERR
2874                     "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
2875                 pci_release_regions(ha->pdev);
2876                 goto iospace_error_exit;
2877         }
2878
2879         /* Mapping of IO base pointer, door bell read and write pointer */
2880
2881         /* mapping of IO base pointer */
2882         ha->qla4_8xxx_reg =
2883             (struct device_reg_82xx  __iomem *)((uint8_t *)ha->nx_pcibase +
2884             0xbc000 + (ha->pdev->devfn << 11));
2885
2886         db_base = pci_resource_start(pdev, 4);  /* doorbell is on bar 4 */
2887         db_len = pci_resource_len(pdev, 4);
2888
2889         ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
2890             QLA82XX_CAM_RAM_DB2);
2891
2892         return 0;
2893 iospace_error_exit:
2894         return -ENOMEM;
2895 }
2896
2897 /***
2898  * qla4xxx_iospace_config - maps registers
2899  * @ha: pointer to adapter structure
2900  *
2901  * This routines maps HBA's registers from the pci address space
2902  * into the kernel virtual address space for memory mapped i/o.
2903  **/
2904 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
2905 {
2906         unsigned long pio, pio_len, pio_flags;
2907         unsigned long mmio, mmio_len, mmio_flags;
2908
2909         pio = pci_resource_start(ha->pdev, 0);
2910         pio_len = pci_resource_len(ha->pdev, 0);
2911         pio_flags = pci_resource_flags(ha->pdev, 0);
2912         if (pio_flags & IORESOURCE_IO) {
2913                 if (pio_len < MIN_IOBASE_LEN) {
2914                         ql4_printk(KERN_WARNING, ha,
2915                                 "Invalid PCI I/O region size\n");
2916                         pio = 0;
2917                 }
2918         } else {
2919                 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
2920                 pio = 0;
2921         }
2922
2923         /* Use MMIO operations for all accesses. */
2924         mmio = pci_resource_start(ha->pdev, 1);
2925         mmio_len = pci_resource_len(ha->pdev, 1);
2926         mmio_flags = pci_resource_flags(ha->pdev, 1);
2927
2928         if (!(mmio_flags & IORESOURCE_MEM)) {
2929                 ql4_printk(KERN_ERR, ha,
2930                     "region #0 not an MMIO resource, aborting\n");
2931
2932                 goto iospace_error_exit;
2933         }
2934
2935         if (mmio_len < MIN_IOBASE_LEN) {
2936                 ql4_printk(KERN_ERR, ha,
2937                     "Invalid PCI mem region size, aborting\n");
2938                 goto iospace_error_exit;
2939         }
2940
2941         if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
2942                 ql4_printk(KERN_WARNING, ha,
2943                     "Failed to reserve PIO/MMIO regions\n");
2944
2945                 goto iospace_error_exit;
2946         }
2947
2948         ha->pio_address = pio;
2949         ha->pio_length = pio_len;
2950         ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
2951         if (!ha->reg) {
2952                 ql4_printk(KERN_ERR, ha,
2953                     "cannot remap MMIO, aborting\n");
2954
2955                 goto iospace_error_exit;
2956         }
2957
2958         return 0;
2959
2960 iospace_error_exit:
2961         return -ENOMEM;
2962 }
2963
2964 static struct isp_operations qla4xxx_isp_ops = {
2965         .iospace_config         = qla4xxx_iospace_config,
2966         .pci_config             = qla4xxx_pci_config,
2967         .disable_intrs          = qla4xxx_disable_intrs,
2968         .enable_intrs           = qla4xxx_enable_intrs,
2969         .start_firmware         = qla4xxx_start_firmware,
2970         .intr_handler           = qla4xxx_intr_handler,
2971         .interrupt_service_routine = qla4xxx_interrupt_service_routine,
2972         .reset_chip             = qla4xxx_soft_reset,
2973         .reset_firmware         = qla4xxx_hw_reset,
2974         .queue_iocb             = qla4xxx_queue_iocb,
2975         .complete_iocb          = qla4xxx_complete_iocb,
2976         .rd_shdw_req_q_out      = qla4xxx_rd_shdw_req_q_out,
2977         .rd_shdw_rsp_q_in       = qla4xxx_rd_shdw_rsp_q_in,
2978         .get_sys_info           = qla4xxx_get_sys_info,
2979 };
2980
2981 static struct isp_operations qla4_8xxx_isp_ops = {
2982         .iospace_config         = qla4_8xxx_iospace_config,
2983         .pci_config &nb