drivers/scsi/be2iscsi/be_iscsi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
   4  * Host Bus Adapters. Refer to the README file included with this package
   5  * for driver version and adapter compatibility.
   6  *
   7  * Copyright (c) 2018 Broadcom. All Rights Reserved.
   8  * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
   9  *
  10  * Contact Information:
  11  * linux-drivers@broadcom.com
  12  */
  13
  14 #include <scsi/libiscsi.h>
  15 #include <scsi/scsi_transport_iscsi.h>
  16 #include <scsi/scsi_transport.h>
  17 #include <scsi/scsi_cmnd.h>
  18 #include <scsi/scsi_device.h>
  19 #include <scsi/scsi_host.h>
  20 #include <scsi/scsi_netlink.h>
  21 #include <net/netlink.h>
  22 #include <scsi/scsi.h>
  23
  24 #include "be_iscsi.h"
  25
  26 extern struct iscsi_transport beiscsi_iscsi_transport;
  27
  28 /**
  29  * beiscsi_session_create - creates a new iscsi session
  30  * @cmds_max: max commands supported
  31  * @qdepth: max queue depth supported
  32  * @initial_cmdsn: initial iscsi CMDSN
  33  */
  34 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  35                                                  u16 cmds_max,
  36                                                  u16 qdepth,
  37                                                  u32 initial_cmdsn)
  38 {
  39         struct Scsi_Host *shost;
  40         struct beiscsi_endpoint *beiscsi_ep;
  41         struct iscsi_cls_session *cls_session;
  42         struct beiscsi_hba *phba;
  43         struct iscsi_session *sess;
  44         struct beiscsi_session *beiscsi_sess;
  45         struct beiscsi_io_task *io_task;
  46
  47
  48         if (!ep) {
  49                 pr_err("beiscsi_session_create: invalid ep\n");
  50                 return NULL;
  51         }
  52         beiscsi_ep = ep->dd_data;
  53         phba = beiscsi_ep->phba;
  54
  55         if (!beiscsi_hba_is_online(phba)) {
  56                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  57                             "BS_%d : HBA in error 0x%lx\n", phba->state);
  58                 return NULL;
  59         }
  60
  61         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  62                     "BS_%d : In beiscsi_session_create\n");
  63         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  64                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  65                             "BS_%d : Cannot handle %d cmds."
  66                             "Max cmds per session supported is %d. Using %d."
  67                             "\n", cmds_max,
  68                             beiscsi_ep->phba->params.wrbs_per_cxn,
  69                             beiscsi_ep->phba->params.wrbs_per_cxn);
  70
  71                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  72         }
  73
  74         shost = phba->shost;
  75         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  76                                           shost, cmds_max,
  77                                           sizeof(*beiscsi_sess),
  78                                           sizeof(*io_task),
  79                                           initial_cmdsn, ISCSI_MAX_TARGET);
  80         if (!cls_session)
  81                 return NULL;
  82         sess = cls_session->dd_data;
  83         beiscsi_sess = sess->dd_data;
  84         beiscsi_sess->bhs_pool =  dma_pool_create("beiscsi_bhs_pool",
  85                                                    &phba->pcidev->dev,
  86                                                    sizeof(struct be_cmd_bhs),
  87                                                    64, 0);
  88         if (!beiscsi_sess->bhs_pool)
  89                 goto destroy_sess;
  90
  91         return cls_session;
  92 destroy_sess:
  93         iscsi_session_teardown(cls_session);
  94         return NULL;
  95 }
  96
  97 /**
  98  * beiscsi_session_destroy - destroys iscsi session
  99  * @cls_session:        pointer to iscsi cls session
 100  *
 101  * Destroys iSCSI session instance and releases
 102  * resources allocated for it.
 103  */
 104 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 105 {
 106         struct iscsi_session *sess = cls_session->dd_data;
 107         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 108
 109         printk(KERN_INFO "In beiscsi_session_destroy\n");
 110         dma_pool_destroy(beiscsi_sess->bhs_pool);
 111         iscsi_session_teardown(cls_session);
 112 }
 113
 114 /**
 115  * beiscsi_session_fail(): Closing session with appropriate error
 116  * @cls_session: ptr to session
 117  **/
 118 void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
 119 {
 120         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 121 }
 122
 123
 124 /**
 125  * beiscsi_conn_create - create an instance of iscsi connection
 126  * @cls_session: ptr to iscsi_cls_session
 127  * @cid: iscsi cid
 128  */
 129 struct iscsi_cls_conn *
 130 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 131 {
 132         struct beiscsi_hba *phba;
 133         struct Scsi_Host *shost;
 134         struct iscsi_cls_conn *cls_conn;
 135         struct beiscsi_conn *beiscsi_conn;
 136         struct iscsi_conn *conn;
 137         struct iscsi_session *sess;
 138         struct beiscsi_session *beiscsi_sess;
 139
 140         shost = iscsi_session_to_shost(cls_session);
 141         phba = iscsi_host_priv(shost);
 142
 143         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 144                     "BS_%d : In beiscsi_conn_create ,cid"
 145                     "from iscsi layer=%d\n", cid);
 146
 147         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 148         if (!cls_conn)
 149                 return NULL;
 150
 151         conn = cls_conn->dd_data;
 152         beiscsi_conn = conn->dd_data;
 153         beiscsi_conn->ep = NULL;
 154         beiscsi_conn->phba = phba;
 155         beiscsi_conn->conn = conn;
 156         sess = cls_session->dd_data;
 157         beiscsi_sess = sess->dd_data;
 158         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 159         return cls_conn;
 160 }
 161
 162 /**
 163  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 164  * @cls_session: pointer to iscsi cls session
 165  * @cls_conn: pointer to iscsi cls conn
 166  * @transport_fd: EP handle(64 bit)
 167  *
 168  * This function binds the TCP Conn with iSCSI Connection and Session.
 169  */
 170 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 171                       struct iscsi_cls_conn *cls_conn,
 172                       u64 transport_fd, int is_leading)
 173 {
 174         struct iscsi_conn *conn = cls_conn->dd_data;
 175         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 176         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
 177         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 178         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
 179         struct hwi_wrb_context *pwrb_context;
 180         struct beiscsi_endpoint *beiscsi_ep;
 181         struct iscsi_endpoint *ep;
 182         uint16_t cri_index;
 183
 184         ep = iscsi_lookup_endpoint(transport_fd);
 185         if (!ep)
 186                 return -EINVAL;
 187
 188         beiscsi_ep = ep->dd_data;
 189
 190         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 191                 return -EINVAL;
 192
 193         if (beiscsi_ep->phba != phba) {
 194                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 195                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
 196                             beiscsi_ep->phba, phba);
 197
 198                 return -EEXIST;
 199         }
 200         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
 201         if (phba->conn_table[cri_index]) {
 202                 if (beiscsi_conn != phba->conn_table[cri_index] ||
 203                     beiscsi_ep != phba->conn_table[cri_index]->ep) {
 204                         __beiscsi_log(phba, KERN_ERR,
 205                                       "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
 206                                       cri_index,
 207                                       beiscsi_ep->ep_cid,
 208                                       beiscsi_conn,
 209                                       phba->conn_table[cri_index]);
 210                         return -EINVAL;
 211                 }
 212         }
 213
 214         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 215         beiscsi_conn->ep = beiscsi_ep;
 216         beiscsi_ep->conn = beiscsi_conn;
 217         /**
 218          * Each connection is associated with a WRBQ kept in wrb_context.
 219          * Store doorbell offset for transmit path.
 220          */
 221         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 222         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
 223         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 224                     "BS_%d : cid %d phba->conn_table[%u]=%p\n",
 225                     beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
 226         phba->conn_table[cri_index] = beiscsi_conn;
 227         return 0;
 228 }
 229
 230 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
 231 {
 232         if (phba->ipv4_iface)
 233                 return 0;
 234
 235         phba->ipv4_iface = iscsi_create_iface(phba->shost,
 236                                               &beiscsi_iscsi_transport,
 237                                               ISCSI_IFACE_TYPE_IPV4,
 238                                               0, 0);
 239         if (!phba->ipv4_iface) {
 240                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 241                             "BS_%d : Could not "
 242                             "create default IPv4 address.\n");
 243                 return -ENODEV;
 244         }
 245
 246         return 0;
 247 }
 248
 249 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
 250 {
 251         if (phba->ipv6_iface)
 252                 return 0;
 253
 254         phba->ipv6_iface = iscsi_create_iface(phba->shost,
 255                                               &beiscsi_iscsi_transport,
 256                                               ISCSI_IFACE_TYPE_IPV6,
 257                                               0, 0);
 258         if (!phba->ipv6_iface) {
 259                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 260                             "BS_%d : Could not "
 261                             "create default IPv6 address.\n");
 262                 return -ENODEV;
 263         }
 264
 265         return 0;
 266 }
 267
 268 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 269 {
 270         struct be_cmd_get_if_info_resp *if_info;
 271
 272         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 273                 beiscsi_iface_create_ipv4(phba);
 274                 kfree(if_info);
 275         }
 276
 277         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 278                 beiscsi_iface_create_ipv6(phba);
 279                 kfree(if_info);
 280         }
 281 }
 282
 283 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
 284 {
 285         if (phba->ipv6_iface) {
 286                 iscsi_destroy_iface(phba->ipv6_iface);
 287                 phba->ipv6_iface = NULL;
 288         }
 289         if (phba->ipv4_iface) {
 290                 iscsi_destroy_iface(phba->ipv4_iface);
 291                 phba->ipv4_iface = NULL;
 292         }
 293 }
 294
 295 /**
 296  * beiscsi_set_vlan_tag()- Set the VLAN TAG
 297  * @shost: Scsi Host for the driver instance
 298  * @iface_param: Interface paramters
 299  *
 300  * Set the VLAN TAG for the adapter or disable
 301  * the VLAN config
 302  *
 303  * returns
 304  *      Success: 0
 305  *      Failure: Non-Zero Value
 306  **/
 307 static int
 308 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
 309                           struct iscsi_iface_param_info *iface_param)
 310 {
 311         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 312         int ret = -EPERM;
 313
 314         switch (iface_param->param) {
 315         case ISCSI_NET_PARAM_VLAN_ENABLED:
 316                 ret = 0;
 317                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
 318                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
 319                 break;
 320         case ISCSI_NET_PARAM_VLAN_TAG:
 321                 ret = beiscsi_if_set_vlan(phba,
 322                                           *((uint16_t *)iface_param->value));
 323                 break;
 324         }
 325         return ret;
 326 }
 327
 328
 329 static int
 330 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 331                           struct iscsi_iface_param_info *info,
 332                           void *data, uint32_t dt_len)
 333 {
 334         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 335         u8 *ip = NULL, *subnet = NULL, *gw;
 336         struct nlattr *nla;
 337         int ret = -EPERM;
 338
 339         /* Check the param */
 340         switch (info->param) {
 341         case ISCSI_NET_PARAM_IFACE_ENABLE:
 342                 if (info->value[0] == ISCSI_IFACE_ENABLE)
 343                         ret = beiscsi_iface_create_ipv4(phba);
 344                 else {
 345                         iscsi_destroy_iface(phba->ipv4_iface);
 346                         phba->ipv4_iface = NULL;
 347                 }
 348                 break;
 349         case ISCSI_NET_PARAM_IPV4_GW:
 350                 gw = info->value;
 351                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 352                 break;
 353         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 354                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
 355                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 356                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 357                         /* release DHCP IP address */
 358                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 359                                                    NULL, NULL);
 360                 else
 361                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 362                                     "BS_%d : Invalid BOOTPROTO: %d\n",
 363                                     info->value[0]);
 364                 break;
 365         case ISCSI_NET_PARAM_IPV4_ADDR:
 366                 ip = info->value;
 367                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
 368                 if (nla) {
 369                         info = nla_data(nla);
 370                         subnet = info->value;
 371                 }
 372                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 373                                            ip, subnet);
 374                 break;
 375         case ISCSI_NET_PARAM_IPV4_SUBNET:
 376                 /*
 377                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
 378                  * and subnet both. Find IP to be applied for this subnet.
 379                  */
 380                 subnet = info->value;
 381                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
 382                 if (nla) {
 383                         info = nla_data(nla);
 384                         ip = info->value;
 385                 }
 386                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 387                                            ip, subnet);
 388                 break;
 389         }
 390
 391         return ret;
 392 }
 393
 394 static int
 395 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 396                           struct iscsi_iface_param_info *iface_param,
 397                           void *data, uint32_t dt_len)
 398 {
 399         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 400         int ret = -EPERM;
 401
 402         switch (iface_param->param) {
 403         case ISCSI_NET_PARAM_IFACE_ENABLE:
 404                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
 405                         ret = beiscsi_iface_create_ipv6(phba);
 406                 else {
 407                         iscsi_destroy_iface(phba->ipv6_iface);
 408                         phba->ipv6_iface = NULL;
 409                 }
 410                 break;
 411         case ISCSI_NET_PARAM_IPV6_ADDR:
 412                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 413                                            iface_param->value, NULL);
 414                 break;
 415         }
 416
 417         return ret;
 418 }
 419
 420 int beiscsi_iface_set_param(struct Scsi_Host *shost,
 421                             void *data, uint32_t dt_len)
 422 {
 423         struct iscsi_iface_param_info *iface_param = NULL;
 424         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 425         struct nlattr *attrib;
 426         uint32_t rm_len = dt_len;
 427         int ret;
 428
 429         if (!beiscsi_hba_is_online(phba)) {
 430                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 431                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 432                 return -EBUSY;
 433         }
 434
 435         /* update interface_handle */
 436         ret = beiscsi_if_get_handle(phba);
 437         if (ret) {
 438                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 439                             "BS_%d : Getting Interface Handle Failed\n");
 440                 return ret;
 441         }
 442
 443         nla_for_each_attr(attrib, data, dt_len, rm_len) {
 444                 iface_param = nla_data(attrib);
 445
 446                 if (iface_param->param_type != ISCSI_NET_PARAM)
 447                         continue;
 448
 449                 /*
 450                  * BE2ISCSI only supports 1 interface
 451                  */
 452                 if (iface_param->iface_num) {
 453                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 454                                     "BS_%d : Invalid iface_num %d."
 455                                     "Only iface_num 0 is supported.\n",
 456                                     iface_param->iface_num);
 457
 458                         return -EINVAL;
 459                 }
 460
 461                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 462                             "BS_%d : %s.0 set param %d",
 463                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 464                             "ipv4" : "ipv6", iface_param->param);
 465
 466                 ret = -EPERM;
 467                 switch (iface_param->param) {
 468                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 469                 case ISCSI_NET_PARAM_VLAN_TAG:
 470                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 471                         break;
 472                 default:
 473                         switch (iface_param->iface_type) {
 474                         case ISCSI_IFACE_TYPE_IPV4:
 475                                 ret = beiscsi_iface_config_ipv4(shost,
 476                                                                 iface_param,
 477                                                                 data, dt_len);
 478                                 break;
 479                         case ISCSI_IFACE_TYPE_IPV6:
 480                                 ret = beiscsi_iface_config_ipv6(shost,
 481                                                                 iface_param,
 482                                                                 data, dt_len);
 483                                 break;
 484                         }
 485                 }
 486
 487                 if (ret == -EPERM) {
 488                         __beiscsi_log(phba, KERN_ERR,
 489                                       "BS_%d : %s.0 set param %d not permitted",
 490                                       (iface_param->iface_type ==
 491                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 492                                       iface_param->param);
 493                         ret = 0;
 494                 }
 495                 if (ret)
 496                         break;
 497         }
 498
 499         return ret;
 500 }
 501
 502 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 503                                      struct iscsi_iface *iface,
 504                                      int param, char *buf)
 505 {
 506         struct be_cmd_get_if_info_resp *if_info;
 507         int len, ip_type = BEISCSI_IP_TYPE_V4;
 508
 509         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 510                 ip_type = BEISCSI_IP_TYPE_V6;
 511
 512         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 513         if (len)
 514                 return len;
 515
 516         switch (param) {
 517         case ISCSI_NET_PARAM_IPV4_ADDR:
 518                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 519                 break;
 520         case ISCSI_NET_PARAM_IPV6_ADDR:
 521                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 522                 break;
 523         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 524                 if (!if_info->dhcp_state)
 525                         len = sprintf(buf, "static\n");
 526                 else
 527                         len = sprintf(buf, "dhcp\n");
 528                 break;
 529         case ISCSI_NET_PARAM_IPV4_SUBNET:
 530                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 531                 break;
 532         case ISCSI_NET_PARAM_VLAN_ENABLED:
 533                 len = sprintf(buf, "%s\n",
 534                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 535                               "disable" : "enable");
 536                 break;
 537         case ISCSI_NET_PARAM_VLAN_ID:
 538                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 539                         len = -EINVAL;
 540                 else
 541                         len = sprintf(buf, "%d\n",
 542                                       (if_info->vlan_priority &
 543                                        ISCSI_MAX_VLAN_ID));
 544                 break;
 545         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 546                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 547                         len = -EINVAL;
 548                 else
 549                         len = sprintf(buf, "%d\n",
 550                                       ((if_info->vlan_priority >> 13) &
 551                                        ISCSI_MAX_VLAN_PRIORITY));
 552                 break;
 553         default:
 554                 WARN_ON(1);
 555         }
 556
 557         kfree(if_info);
 558         return len;
 559 }
 560
 561 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 562                             enum iscsi_param_type param_type,
 563                             int param, char *buf)
 564 {
 565         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 566         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 567         struct be_cmd_get_def_gateway_resp gateway;
 568         int len = -EPERM;
 569
 570         if (param_type != ISCSI_NET_PARAM)
 571                 return 0;
 572         if (!beiscsi_hba_is_online(phba)) {
 573                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 574                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 575                 return -EBUSY;
 576         }
 577
 578         switch (param) {
 579         case ISCSI_NET_PARAM_IPV4_ADDR:
 580         case ISCSI_NET_PARAM_IPV4_SUBNET:
 581         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 582         case ISCSI_NET_PARAM_IPV6_ADDR:
 583         case ISCSI_NET_PARAM_VLAN_ENABLED:
 584         case ISCSI_NET_PARAM_VLAN_ID:
 585         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 586                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 587                 break;
 588         case ISCSI_NET_PARAM_IFACE_ENABLE:
 589                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 590                         len = sprintf(buf, "%s\n",
 591                                       phba->ipv4_iface ? "enable" : "disable");
 592                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 593                         len = sprintf(buf, "%s\n",
 594                                       phba->ipv6_iface ? "enable" : "disable");
 595                 break;
 596         case ISCSI_NET_PARAM_IPV4_GW:
 597                 memset(&gateway, 0, sizeof(gateway));
 598                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 599                 if (!len)
 600                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 601                 break;
 602         }
 603
 604         return len;
 605 }
 606
 607 /**
 608  * beiscsi_ep_get_param - get the iscsi parameter
 609  * @ep: pointer to iscsi ep
 610  * @param: parameter type identifier
 611  * @buf: buffer pointer
 612  *
 613  * returns iscsi parameter
 614  */
 615 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 616                            enum iscsi_param param, char *buf)
 617 {
 618         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 619         int len;
 620
 621         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 622                     BEISCSI_LOG_CONFIG,
 623                     "BS_%d : In beiscsi_ep_get_param,"
 624                     " param= %d\n", param);
 625
 626         switch (param) {
 627         case ISCSI_PARAM_CONN_PORT:
 628                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 629                 break;
 630         case ISCSI_PARAM_CONN_ADDRESS:
 631                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 632                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 633                 else
 634                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 635                 break;
 636         default:
 637                 len = -EPERM;
 638         }
 639         return len;
 640 }
 641
 642 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 643                       enum iscsi_param param, char *buf, int buflen)
 644 {
 645         struct iscsi_conn *conn = cls_conn->dd_data;
 646         struct iscsi_session *session = conn->session;
 647         struct beiscsi_hba *phba = NULL;
 648         int ret;
 649
 650         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 651         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 652                     "BS_%d : In beiscsi_conn_set_param,"
 653                     " param= %d\n", param);
 654
 655         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 656         if (ret)
 657                 return ret;
 658         /*
 659          * If userspace tried to set the value to higher than we can
 660          * support override here.
 661          */
 662         switch (param) {
 663         case ISCSI_PARAM_FIRST_BURST:
 664                 if (session->first_burst > 8192)
 665                         session->first_burst = 8192;
 666                 break;
 667         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 668                 if (conn->max_recv_dlength > 65536)
 669                         conn->max_recv_dlength = 65536;
 670                 break;
 671         case ISCSI_PARAM_MAX_BURST:
 672                 if (session->max_burst > 262144)
 673                         session->max_burst = 262144;
 674                 break;
 675         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 676                 if (conn->max_xmit_dlength > 65536)
 677                         conn->max_xmit_dlength = 65536;
 678                 /* fall through */
 679         default:
 680                 return 0;
 681         }
 682
 683         return 0;
 684 }
 685
 686 /**
 687  * beiscsi_get_port_state - Get the Port State
 688  * @shost : pointer to scsi_host structure
 689  *
 690  */
 691 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 692 {
 693         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 694         struct iscsi_cls_host *ihost = shost->shost_data;
 695
 696         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
 697                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 698 }
 699
 700 /**
 701  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 702  * @shost : pointer to scsi_host structure
 703  *
 704  */
 705 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 706 {
 707         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 708         struct iscsi_cls_host *ihost = shost->shost_data;
 709
 710         switch (phba->port_speed) {
 711         case BE2ISCSI_LINK_SPEED_10MBPS:
 712                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 713                 break;
 714         case BE2ISCSI_LINK_SPEED_100MBPS:
 715                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 716                 break;
 717         case BE2ISCSI_LINK_SPEED_1GBPS:
 718                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 719                 break;
 720         case BE2ISCSI_LINK_SPEED_10GBPS:
 721                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 722                 break;
 723         case BE2ISCSI_LINK_SPEED_25GBPS:
 724                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 725                 break;
 726         case BE2ISCSI_LINK_SPEED_40GBPS:
 727                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 728                 break;
 729         default:
 730                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 731         }
 732 }
 733
 734 /**
 735  * beiscsi_get_host_param - get the iscsi parameter
 736  * @shost: pointer to scsi_host structure
 737  * @param: parameter type identifier
 738  * @buf: buffer pointer
 739  *
 740  */
 741 int beiscsi_get_host_param(struct Scsi_Host *shost,
 742                            enum iscsi_host_param param, char *buf)
 743 {
 744         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 745         int status = 0;
 746
 747         if (!beiscsi_hba_is_online(phba)) {
 748                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 749                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 750                 return 0;
 751         }
 752         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 753                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
 754
 755         switch (param) {
 756         case ISCSI_HOST_PARAM_HWADDRESS:
 757                 status = beiscsi_get_macaddr(buf, phba);
 758                 if (status < 0) {
 759                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 760                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 761                         return 0;
 762                 }
 763                 break;
 764         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 765                 /* try fetching user configured name first */
 766                 status = beiscsi_get_initiator_name(phba, buf, true);
 767                 if (status < 0) {
 768                         status = beiscsi_get_initiator_name(phba, buf, false);
 769                         if (status < 0) {
 770                                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 771                                             "BS_%d : Retrieving Initiator Name Failed\n");
 772                                 status = 0;
 773                         }
 774                 }
 775                 break;
 776         case ISCSI_HOST_PARAM_PORT_STATE:
 777                 beiscsi_get_port_state(shost);
 778                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 779                 break;
 780         case ISCSI_HOST_PARAM_PORT_SPEED:
 781                 beiscsi_get_port_speed(shost);
 782                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 783                 break;
 784         default:
 785                 return iscsi_host_get_param(shost, param, buf);
 786         }
 787         return status;
 788 }
 789
 790 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 791 {
 792         struct be_cmd_get_nic_conf_resp resp;
 793         int rc;
 794
 795         if (phba->mac_addr_set)
 796                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 797
 798         memset(&resp, 0, sizeof(resp));
 799         rc = mgmt_get_nic_conf(phba, &resp);
 800         if (rc)
 801                 return rc;
 802
 803         phba->mac_addr_set = true;
 804         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 805         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 806 }
 807
 808 /**
 809  * beiscsi_conn_get_stats - get the iscsi stats
 810  * @cls_conn: pointer to iscsi cls conn
 811  * @stats: pointer to iscsi_stats structure
 812  *
 813  * returns iscsi stats
 814  */
 815 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 816                             struct iscsi_stats *stats)
 817 {
 818         struct iscsi_conn *conn = cls_conn->dd_data;
 819         struct beiscsi_hba *phba = NULL;
 820
 821         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 822         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 823                     "BS_%d : In beiscsi_conn_get_stats\n");
 824
 825         stats->txdata_octets = conn->txdata_octets;
 826         stats->rxdata_octets = conn->rxdata_octets;
 827         stats->dataout_pdus = conn->dataout_pdus_cnt;
 828         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 829         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 830         stats->datain_pdus = conn->datain_pdus_cnt;
 831         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 832         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 833         stats->r2t_pdus = conn->r2t_pdus_cnt;
 834         stats->digest_err = 0;
 835         stats->timeout_err = 0;
 836         stats->custom_length = 1;
 837         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 838         stats->custom[0].value = conn->eh_abort_cnt;
 839 }
 840
 841 /**
 842  * beiscsi_set_params_for_offld - get the parameters for offload
 843  * @beiscsi_conn: pointer to beiscsi_conn
 844  * @params: pointer to offload_params structure
 845  */
 846 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 847                                           struct beiscsi_offload_params *params)
 848 {
 849         struct iscsi_conn *conn = beiscsi_conn->conn;
 850         struct iscsi_session *session = conn->session;
 851
 852         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 853                       params, session->max_burst);
 854         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 855                       max_send_data_segment_length, params,
 856                       conn->max_xmit_dlength);
 857         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 858                       params, session->first_burst);
 859         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 860                       session->erl);
 861         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 862                       conn->datadgst_en);
 863         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 864                       conn->hdrdgst_en);
 865         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 866                       session->initial_r2t_en);
 867         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 868                       session->imm_data_en);
 869         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 870                       data_seq_inorder, params,
 871                       session->dataseq_inorder_en);
 872         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 873                       pdu_seq_inorder, params,
 874                       session->pdu_inorder_en);
 875         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 876                       session->max_r2t);
 877         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 878                       (conn->exp_statsn - 1));
 879         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 880                       max_recv_data_segment_length, params,
 881                       conn->max_recv_dlength);
 882
 883 }
 884
 885 /**
 886  * beiscsi_conn_start - offload of session to chip
 887  * @cls_conn: pointer to beiscsi_conn
 888  */
 889 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 890 {
 891         struct iscsi_conn *conn = cls_conn->dd_data;
 892         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 893         struct beiscsi_endpoint *beiscsi_ep;
 894         struct beiscsi_offload_params params;
 895         struct beiscsi_hba *phba;
 896
 897         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 898
 899         if (!beiscsi_hba_is_online(phba)) {
 900                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 901                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 902                 return -EBUSY;
 903         }
 904         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 905                     "BS_%d : In beiscsi_conn_start\n");
 906
 907         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 908         beiscsi_ep = beiscsi_conn->ep;
 909         if (!beiscsi_ep)
 910                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 911                             BEISCSI_LOG_CONFIG,
 912                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 913
 914         beiscsi_conn->login_in_progress = 0;
 915         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 916         beiscsi_offload_connection(beiscsi_conn, &params);
 917         iscsi_conn_start(cls_conn);
 918         return 0;
 919 }
 920
 921 /**
 922  * beiscsi_get_cid - Allocate a cid
 923  * @phba: The phba instance
 924  */
 925 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 926 {
 927         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 928         unsigned short cid, cid_from_ulp;
 929         struct ulp_cid_info *cid_info;
 930
 931         /* Find the ULP which has more CID available */
 932         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 933                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 934         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 935                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 936         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 937                         BEISCSI_ULP0 : BEISCSI_ULP1;
 938         /**
 939          * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
 940          * is ZERO for both, ULP 1 is returned.
 941          * Check if ULP is loaded before getting new CID.
 942          */
 943         if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
 944                 return BE_INVALID_CID;
 945
 946         cid_info = phba->cid_array_info[cid_from_ulp];
 947         cid = cid_info->cid_array[cid_info->cid_alloc];
 948         if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
 949                 __beiscsi_log(phba, KERN_ERR,
 950                                 "BS_%d : failed to get cid: available %u:%u\n",
 951                                 cid_info->avlbl_cids, cid_info->cid_free);
 952                 return BE_INVALID_CID;
 953         }
 954         /* empty the slot */
 955         cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
 956         if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
 957                 cid_info->cid_alloc = 0;
 958         cid_info->avlbl_cids--;
 959         return cid;
 960 }
 961
 962 /**
 963  * beiscsi_put_cid - Free the cid
 964  * @phba: The phba for which the cid is being freed
 965  * @cid: The cid to free
 966  */
 967 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 968 {
 969         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
 970         struct hwi_wrb_context *pwrb_context;
 971         struct hwi_controller *phwi_ctrlr;
 972         struct ulp_cid_info *cid_info;
 973         uint16_t cid_post_ulp;
 974
 975         phwi_ctrlr = phba->phwi_ctrlr;
 976         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 977         cid_post_ulp = pwrb_context->ulp_num;
 978
 979         cid_info = phba->cid_array_info[cid_post_ulp];
 980         /* fill only in empty slot */
 981         if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
 982                 __beiscsi_log(phba, KERN_ERR,
 983                               "BS_%d : failed to put cid %u: available %u:%u\n",
 984                               cid, cid_info->avlbl_cids, cid_info->cid_free);
 985                 return;
 986         }
 987         cid_info->cid_array[cid_info->cid_free++] = cid;
 988         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
 989                 cid_info->cid_free = 0;
 990         cid_info->avlbl_cids++;
 991 }
 992
 993 /**
 994  * beiscsi_free_ep - free endpoint
 995  * @ep: pointer to iscsi endpoint structure
 996  */
 997 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 998 {
 999         struct beiscsi_hba *phba = beiscsi_ep->phba;
1000         struct beiscsi_conn *beiscsi_conn;
1001
1002         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1003         beiscsi_ep->phba = NULL;
1004         /* clear this to track freeing in beiscsi_ep_disconnect */
1005         phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1006
1007         /**
1008          * Check if any connection resource allocated by driver
1009          * is to be freed.This case occurs when target redirection
1010          * or connection retry is done.
1011          **/
1012         if (!beiscsi_ep->conn)
1013                 return;
1014
1015         beiscsi_conn = beiscsi_ep->conn;
1016         /**
1017          * Break ep->conn link here so that completions after
1018          * this are ignored.
1019          */
1020         beiscsi_ep->conn = NULL;
1021         if (beiscsi_conn->login_in_progress) {
1022                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1023                                                beiscsi_conn->task);
1024                 beiscsi_conn->login_in_progress = 0;
1025         }
1026 }
1027
1028 /**
1029  * beiscsi_open_conn - Ask FW to open a TCP connection
1030  * @ep: endpoint to be used
1031  * @src_addr: The source IP address
1032  * @dst_addr: The Destination  IP address
1033  *
1034  * Asks the FW to open a TCP connection
1035  */
1036 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1037                              struct sockaddr *src_addr,
1038                              struct sockaddr *dst_addr, int non_blocking)
1039 {
1040         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1041         struct beiscsi_hba *phba = beiscsi_ep->phba;
1042         struct tcp_connect_and_offload_out *ptcpcnct_out;
1043         struct be_dma_mem nonemb_cmd;
1044         unsigned int tag, req_memsize;
1045         int ret = -ENOMEM;
1046
1047         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1048                     "BS_%d : In beiscsi_open_conn\n");
1049
1050         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1051         if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1052                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1053                             "BS_%d : No free cid available\n");
1054                 return ret;
1055         }
1056
1057         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1058                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1059                     beiscsi_ep->ep_cid);
1060
1061         phba->ep_array[BE_GET_CRI_FROM_CID
1062                        (beiscsi_ep->ep_cid)] = ep;
1063
1064         beiscsi_ep->cid_vld = 0;
1065
1066         if (is_chip_be2_be3r(phba))
1067                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1068         else
1069                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1070
1071         nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
1072                                 req_memsize,
1073                                 &nonemb_cmd.dma, GFP_KERNEL);
1074         if (nonemb_cmd.va == NULL) {
1075
1076                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1077                             "BS_%d : Failed to allocate memory for"
1078                             " mgmt_open_connection\n");
1079
1080                 beiscsi_free_ep(beiscsi_ep);
1081                 return -ENOMEM;
1082         }
1083         nonemb_cmd.size = req_memsize;
1084         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1085         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1086         if (!tag) {
1087                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1088                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1089                             beiscsi_ep->ep_cid);
1090
1091                 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1092                                     nonemb_cmd.va, nonemb_cmd.dma);
1093                 beiscsi_free_ep(beiscsi_ep);
1094                 return -EAGAIN;
1095         }
1096
1097         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1098         if (ret) {
1099                 beiscsi_log(phba, KERN_ERR,
1100                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1101                             "BS_%d : mgmt_open_connection Failed");
1102
1103                 if (ret != -EBUSY)
1104                         dma_free_coherent(&phba->ctrl.pdev->dev,
1105                                         nonemb_cmd.size, nonemb_cmd.va,
1106                                         nonemb_cmd.dma);
1107
1108                 beiscsi_free_ep(beiscsi_ep);
1109                 return ret;
1110         }
1111
1112         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1113         beiscsi_ep = ep->dd_data;
1114         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1115         beiscsi_ep->cid_vld = 1;
1116         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1117                     "BS_%d : mgmt_open_connection Success\n");
1118
1119         dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1120                             nonemb_cmd.va, nonemb_cmd.dma);
1121         return 0;
1122 }
1123
1124 /**
1125  * beiscsi_ep_connect - Ask chip to create TCP Conn
1126  * @scsi_host: Pointer to scsi_host structure
1127  * @dst_addr: The IP address of Target
1128  * @non_blocking: blocking or non-blocking call
1129  *
1130  * This routines first asks chip to create a connection and then allocates an EP
1131  */
1132 struct iscsi_endpoint *
1133 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1134                    int non_blocking)
1135 {
1136         struct beiscsi_hba *phba;
1137         struct beiscsi_endpoint *beiscsi_ep;
1138         struct iscsi_endpoint *ep;
1139         int ret;
1140
1141         if (!shost) {
1142                 ret = -ENXIO;
1143                 pr_err("beiscsi_ep_connect shost is NULL\n");
1144                 return ERR_PTR(ret);
1145         }
1146
1147         phba = iscsi_host_priv(shost);
1148         if (!beiscsi_hba_is_online(phba)) {
1149                 ret = -EIO;
1150                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1151                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1152                 return ERR_PTR(ret);
1153         }
1154         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1155                 ret = -EBUSY;
1156                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1157                             "BS_%d : The Adapter Port state is Down!!!\n");
1158                 return ERR_PTR(ret);
1159         }
1160
1161         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1162         if (!ep) {
1163                 ret = -ENOMEM;
1164                 return ERR_PTR(ret);
1165         }
1166
1167         beiscsi_ep = ep->dd_data;
1168         beiscsi_ep->phba = phba;
1169         beiscsi_ep->openiscsi_ep = ep;
1170         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1171         if (ret) {
1172                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1173                             "BS_%d : Failed in beiscsi_open_conn\n");
1174                 goto free_ep;
1175         }
1176
1177         return ep;
1178
1179 free_ep:
1180         iscsi_destroy_endpoint(ep);
1181         return ERR_PTR(ret);
1182 }
1183
1184 /**
1185  * beiscsi_ep_poll - Poll to see if connection is established
1186  * @ep: endpoint to be used
1187  * @timeout_ms: timeout specified in millisecs
1188  *
1189  * Poll to see if TCP connection established
1190  */
1191 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1192 {
1193         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1194
1195         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1196                     "BS_%d : In  beiscsi_ep_poll\n");
1197
1198         if (beiscsi_ep->cid_vld == 1)
1199                 return 1;
1200         else
1201                 return 0;
1202 }
1203
1204 /**
1205  * beiscsi_flush_cq()- Flush the CQ created.
1206  * @phba: ptr device priv structure.
1207  *
1208  * Before the connection resource are freed flush
1209  * all the CQ enteries
1210  **/
1211 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1212 {
1213         uint16_t i;
1214         struct be_eq_obj *pbe_eq;
1215         struct hwi_controller *phwi_ctrlr;
1216         struct hwi_context_memory *phwi_context;
1217
1218         phwi_ctrlr = phba->phwi_ctrlr;
1219         phwi_context = phwi_ctrlr->phwi_ctxt;
1220
1221         for (i = 0; i < phba->num_cpus; i++) {
1222                 pbe_eq = &phwi_context->be_eq[i];
1223                 irq_poll_disable(&pbe_eq->iopoll);
1224                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1225                 irq_poll_enable(&pbe_eq->iopoll);
1226         }
1227 }
1228
1229 /**
1230  * beiscsi_conn_close - Invalidate and upload connection
1231  * @ep: The iscsi endpoint
1232  *
1233  * Returns 0 on success,  -1 on failure.
1234  */
1235 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1236 {
1237         struct beiscsi_hba *phba = beiscsi_ep->phba;
1238         unsigned int tag, attempts;
1239         int ret;
1240
1241         /**
1242          * Without successfully invalidating and uploading connection
1243          * driver can't reuse the CID so attempt more than once.
1244          */
1245         attempts = 0;
1246         while (attempts++ < 3) {
1247                 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1248                 if (tag) {
1249                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1250                         if (!ret)
1251                                 break;
1252                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1253                                     "BS_%d : invalidate conn failed cid %d\n",
1254                                     beiscsi_ep->ep_cid);
1255                 }
1256         }
1257
1258         /* wait for all completions to arrive, then process them */
1259         msleep(250);
1260         /* flush CQ entries */
1261         beiscsi_flush_cq(phba);
1262
1263         if (attempts > 3)
1264                 return -1;
1265
1266         attempts = 0;
1267         while (attempts++ < 3) {
1268                 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1269                 if (tag) {
1270                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1271                         if (!ret)
1272                                 break;
1273                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1274                                     "BS_%d : upload conn failed cid %d\n",
1275                                     beiscsi_ep->ep_cid);
1276                 }
1277         }
1278         if (attempts > 3)
1279                 return -1;
1280
1281         return 0;
1282 }
1283
1284 /**
1285  * beiscsi_ep_disconnect - Tears down the TCP connection
1286  * @ep: endpoint to be used
1287  *
1288  * Tears down the TCP connection
1289  */
1290 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1291 {
1292         struct beiscsi_endpoint *beiscsi_ep;
1293         struct beiscsi_conn *beiscsi_conn;
1294         struct beiscsi_hba *phba;
1295         uint16_t cri_index;
1296
1297         beiscsi_ep = ep->dd_data;
1298         phba = beiscsi_ep->phba;
1299         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1300                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1301                     beiscsi_ep->ep_cid);
1302
1303         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1304         if (!phba->ep_array[cri_index]) {
1305                 __beiscsi_log(phba, KERN_ERR,
1306                               "BS_%d : ep_array at %u cid %u empty\n",
1307                               cri_index,
1308                               beiscsi_ep->ep_cid);
1309                 return;
1310         }
1311
1312         if (beiscsi_ep->conn) {
1313                 beiscsi_conn = beiscsi_ep->conn;
1314                 iscsi_suspend_queue(beiscsi_conn->conn);
1315         }
1316
1317         if (!beiscsi_hba_is_online(phba)) {
1318                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1319                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1320         } else {
1321                 /**
1322                  * Make CID available even if close fails.
1323                  * If not freed, FW might fail open using the CID.
1324                  */
1325                 if (beiscsi_conn_close(beiscsi_ep) < 0)
1326                         __beiscsi_log(phba, KERN_ERR,
1327                                       "BS_%d : close conn failed cid %d\n",
1328                                       beiscsi_ep->ep_cid);
1329         }
1330
1331         beiscsi_free_ep(beiscsi_ep);
1332         if (!phba->conn_table[cri_index])
1333                 __beiscsi_log(phba, KERN_ERR,
1334                               "BS_%d : conn_table empty at %u: cid %u\n",
1335                               cri_index, beiscsi_ep->ep_cid);
1336         phba->conn_table[cri_index] = NULL;
1337         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1338 }
1339
1340 umode_t beiscsi_attr_is_visible(int param_type, int param)
1341 {
1342         switch (param_type) {
1343         case ISCSI_NET_PARAM:
1344                 switch (param) {
1345                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1346                 case ISCSI_NET_PARAM_IPV4_ADDR:
1347                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1348                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1349                 case ISCSI_NET_PARAM_IPV4_GW:
1350                 case ISCSI_NET_PARAM_IPV6_ADDR:
1351                 case ISCSI_NET_PARAM_VLAN_ID:
1352                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1353                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1354                         return S_IRUGO;
1355                 default:
1356                         return 0;
1357                 }
1358         case ISCSI_HOST_PARAM:
1359                 switch (param) {
1360                 case ISCSI_HOST_PARAM_HWADDRESS:
1361                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1362                 case ISCSI_HOST_PARAM_PORT_STATE:
1363                 case ISCSI_HOST_PARAM_PORT_SPEED:
1364                         return S_IRUGO;
1365                 default:
1366                         return 0;
1367                 }
1368         case ISCSI_PARAM:
1369                 switch (param) {
1370                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1371                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1372                 case ISCSI_PARAM_HDRDGST_EN:
1373                 case ISCSI_PARAM_DATADGST_EN:
1374                 case ISCSI_PARAM_CONN_ADDRESS:
1375                 case ISCSI_PARAM_CONN_PORT:
1376                 case ISCSI_PARAM_EXP_STATSN:
1377                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1378                 case ISCSI_PARAM_PERSISTENT_PORT:
1379                 case ISCSI_PARAM_PING_TMO:
1380                 case ISCSI_PARAM_RECV_TMO:
1381                 case ISCSI_PARAM_INITIAL_R2T_EN:
1382                 case ISCSI_PARAM_MAX_R2T:
1383                 case ISCSI_PARAM_IMM_DATA_EN:
1384                 case ISCSI_PARAM_FIRST_BURST:
1385                 case ISCSI_PARAM_MAX_BURST:
1386                 case ISCSI_PARAM_PDU_INORDER_EN:
1387                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1388                 case ISCSI_PARAM_ERL:
1389                 case ISCSI_PARAM_TARGET_NAME:
1390                 case ISCSI_PARAM_TPGT:
1391                 case ISCSI_PARAM_USERNAME:
1392                 case ISCSI_PARAM_PASSWORD:
1393                 case ISCSI_PARAM_USERNAME_IN:
1394                 case ISCSI_PARAM_PASSWORD_IN:
1395                 case ISCSI_PARAM_FAST_ABORT:
1396                 case ISCSI_PARAM_ABORT_TMO:
1397                 case ISCSI_PARAM_LU_RESET_TMO:
1398                 case ISCSI_PARAM_IFACE_NAME:
1399                 case ISCSI_PARAM_INITIATOR_NAME:
1400                         return S_IRUGO;
1401                 default:
1402                         return 0;
1403                 }
1404         }
1405
1406         return 0;
1407 }