drivers/scsi/be2iscsi/be_iscsi.c

   1 /*
   2  * Copyright 2017 Broadcom. All Rights Reserved.
   3  * The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation. The full GNU General
   8  * Public License is included in this distribution in the file called COPYING.
   9  *
  10  * Contact Information:
  11  * linux-drivers@broadcom.com
  12  *
  13  */
  14
  15 #include <scsi/libiscsi.h>
  16 #include <scsi/scsi_transport_iscsi.h>
  17 #include <scsi/scsi_transport.h>
  18 #include <scsi/scsi_cmnd.h>
  19 #include <scsi/scsi_device.h>
  20 #include <scsi/scsi_host.h>
  21 #include <scsi/scsi_netlink.h>
  22 #include <net/netlink.h>
  23 #include <scsi/scsi.h>
  24
  25 #include "be_iscsi.h"
  26
  27 extern struct iscsi_transport beiscsi_iscsi_transport;
  28
  29 /**
  30  * beiscsi_session_create - creates a new iscsi session
  31  * @cmds_max: max commands supported
  32  * @qdepth: max queue depth supported
  33  * @initial_cmdsn: initial iscsi CMDSN
  34  */
  35 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  36                                                  u16 cmds_max,
  37                                                  u16 qdepth,
  38                                                  u32 initial_cmdsn)
  39 {
  40         struct Scsi_Host *shost;
  41         struct beiscsi_endpoint *beiscsi_ep;
  42         struct iscsi_cls_session *cls_session;
  43         struct beiscsi_hba *phba;
  44         struct iscsi_session *sess;
  45         struct beiscsi_session *beiscsi_sess;
  46         struct beiscsi_io_task *io_task;
  47
  48
  49         if (!ep) {
  50                 pr_err("beiscsi_session_create: invalid ep\n");
  51                 return NULL;
  52         }
  53         beiscsi_ep = ep->dd_data;
  54         phba = beiscsi_ep->phba;
  55
  56         if (!beiscsi_hba_is_online(phba)) {
  57                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  58                             "BS_%d : HBA in error 0x%lx\n", phba->state);
  59                 return NULL;
  60         }
  61
  62         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  63                     "BS_%d : In beiscsi_session_create\n");
  64         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  65                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  66                             "BS_%d : Cannot handle %d cmds."
  67                             "Max cmds per session supported is %d. Using %d."
  68                             "\n", cmds_max,
  69                             beiscsi_ep->phba->params.wrbs_per_cxn,
  70                             beiscsi_ep->phba->params.wrbs_per_cxn);
  71
  72                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  73         }
  74
  75         shost = phba->shost;
  76         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  77                                           shost, cmds_max,
  78                                           sizeof(*beiscsi_sess),
  79                                           sizeof(*io_task),
  80                                           initial_cmdsn, ISCSI_MAX_TARGET);
  81         if (!cls_session)
  82                 return NULL;
  83         sess = cls_session->dd_data;
  84         beiscsi_sess = sess->dd_data;
  85         beiscsi_sess->bhs_pool =  dma_pool_create("beiscsi_bhs_pool",
  86                                                    &phba->pcidev->dev,
  87                                                    sizeof(struct be_cmd_bhs),
  88                                                    64, 0);
  89         if (!beiscsi_sess->bhs_pool)
  90                 goto destroy_sess;
  91
  92         return cls_session;
  93 destroy_sess:
  94         iscsi_session_teardown(cls_session);
  95         return NULL;
  96 }
  97
  98 /**
  99  * beiscsi_session_destroy - destroys iscsi session
 100  * @cls_session:        pointer to iscsi cls session
 101  *
 102  * Destroys iSCSI session instance and releases
 103  * resources allocated for it.
 104  */
 105 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 106 {
 107         struct iscsi_session *sess = cls_session->dd_data;
 108         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 109
 110         printk(KERN_INFO "In beiscsi_session_destroy\n");
 111         dma_pool_destroy(beiscsi_sess->bhs_pool);
 112         iscsi_session_teardown(cls_session);
 113 }
 114
 115 /**
 116  * beiscsi_session_fail(): Closing session with appropriate error
 117  * @cls_session: ptr to session
 118  **/
 119 void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
 120 {
 121         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 122 }
 123
 124
 125 /**
 126  * beiscsi_conn_create - create an instance of iscsi connection
 127  * @cls_session: ptr to iscsi_cls_session
 128  * @cid: iscsi cid
 129  */
 130 struct iscsi_cls_conn *
 131 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 132 {
 133         struct beiscsi_hba *phba;
 134         struct Scsi_Host *shost;
 135         struct iscsi_cls_conn *cls_conn;
 136         struct beiscsi_conn *beiscsi_conn;
 137         struct iscsi_conn *conn;
 138         struct iscsi_session *sess;
 139         struct beiscsi_session *beiscsi_sess;
 140
 141         shost = iscsi_session_to_shost(cls_session);
 142         phba = iscsi_host_priv(shost);
 143
 144         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 145                     "BS_%d : In beiscsi_conn_create ,cid"
 146                     "from iscsi layer=%d\n", cid);
 147
 148         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 149         if (!cls_conn)
 150                 return NULL;
 151
 152         conn = cls_conn->dd_data;
 153         beiscsi_conn = conn->dd_data;
 154         beiscsi_conn->ep = NULL;
 155         beiscsi_conn->phba = phba;
 156         beiscsi_conn->conn = conn;
 157         sess = cls_session->dd_data;
 158         beiscsi_sess = sess->dd_data;
 159         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 160         return cls_conn;
 161 }
 162
 163 /**
 164  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 165  * @cls_session: pointer to iscsi cls session
 166  * @cls_conn: pointer to iscsi cls conn
 167  * @transport_fd: EP handle(64 bit)
 168  *
 169  * This function binds the TCP Conn with iSCSI Connection and Session.
 170  */
 171 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 172                       struct iscsi_cls_conn *cls_conn,
 173                       u64 transport_fd, int is_leading)
 174 {
 175         struct iscsi_conn *conn = cls_conn->dd_data;
 176         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 177         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
 178         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 179         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
 180         struct hwi_wrb_context *pwrb_context;
 181         struct beiscsi_endpoint *beiscsi_ep;
 182         struct iscsi_endpoint *ep;
 183         uint16_t cri_index;
 184
 185         ep = iscsi_lookup_endpoint(transport_fd);
 186         if (!ep)
 187                 return -EINVAL;
 188
 189         beiscsi_ep = ep->dd_data;
 190
 191         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 192                 return -EINVAL;
 193
 194         if (beiscsi_ep->phba != phba) {
 195                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 196                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
 197                             beiscsi_ep->phba, phba);
 198
 199                 return -EEXIST;
 200         }
 201         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
 202         if (phba->conn_table[cri_index]) {
 203                 if (beiscsi_conn != phba->conn_table[cri_index] ||
 204                     beiscsi_ep != phba->conn_table[cri_index]->ep) {
 205                         __beiscsi_log(phba, KERN_ERR,
 206                                       "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
 207                                       cri_index,
 208                                       beiscsi_ep->ep_cid,
 209                                       beiscsi_conn,
 210                                       phba->conn_table[cri_index]);
 211                         return -EINVAL;
 212                 }
 213         }
 214
 215         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 216         beiscsi_conn->ep = beiscsi_ep;
 217         beiscsi_ep->conn = beiscsi_conn;
 218         /**
 219          * Each connection is associated with a WRBQ kept in wrb_context.
 220          * Store doorbell offset for transmit path.
 221          */
 222         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 223         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
 224         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 225                     "BS_%d : cid %d phba->conn_table[%u]=%p\n",
 226                     beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
 227         phba->conn_table[cri_index] = beiscsi_conn;
 228         return 0;
 229 }
 230
 231 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
 232 {
 233         if (phba->ipv4_iface)
 234                 return 0;
 235
 236         phba->ipv4_iface = iscsi_create_iface(phba->shost,
 237                                               &beiscsi_iscsi_transport,
 238                                               ISCSI_IFACE_TYPE_IPV4,
 239                                               0, 0);
 240         if (!phba->ipv4_iface) {
 241                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 242                             "BS_%d : Could not "
 243                             "create default IPv4 address.\n");
 244                 return -ENODEV;
 245         }
 246
 247         return 0;
 248 }
 249
 250 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
 251 {
 252         if (phba->ipv6_iface)
 253                 return 0;
 254
 255         phba->ipv6_iface = iscsi_create_iface(phba->shost,
 256                                               &beiscsi_iscsi_transport,
 257                                               ISCSI_IFACE_TYPE_IPV6,
 258                                               0, 0);
 259         if (!phba->ipv6_iface) {
 260                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 261                             "BS_%d : Could not "
 262                             "create default IPv6 address.\n");
 263                 return -ENODEV;
 264         }
 265
 266         return 0;
 267 }
 268
 269 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 270 {
 271         struct be_cmd_get_if_info_resp *if_info;
 272
 273         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 274                 beiscsi_iface_create_ipv4(phba);
 275                 kfree(if_info);
 276         }
 277
 278         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 279                 beiscsi_iface_create_ipv6(phba);
 280                 kfree(if_info);
 281         }
 282 }
 283
 284 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
 285 {
 286         if (phba->ipv6_iface) {
 287                 iscsi_destroy_iface(phba->ipv6_iface);
 288                 phba->ipv6_iface = NULL;
 289         }
 290         if (phba->ipv4_iface) {
 291                 iscsi_destroy_iface(phba->ipv4_iface);
 292                 phba->ipv4_iface = NULL;
 293         }
 294 }
 295
 296 /**
 297  * beiscsi_set_vlan_tag()- Set the VLAN TAG
 298  * @shost: Scsi Host for the driver instance
 299  * @iface_param: Interface paramters
 300  *
 301  * Set the VLAN TAG for the adapter or disable
 302  * the VLAN config
 303  *
 304  * returns
 305  *      Success: 0
 306  *      Failure: Non-Zero Value
 307  **/
 308 static int
 309 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
 310                           struct iscsi_iface_param_info *iface_param)
 311 {
 312         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 313         int ret = -EPERM;
 314
 315         switch (iface_param->param) {
 316         case ISCSI_NET_PARAM_VLAN_ENABLED:
 317                 ret = 0;
 318                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
 319                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
 320                 break;
 321         case ISCSI_NET_PARAM_VLAN_TAG:
 322                 ret = beiscsi_if_set_vlan(phba,
 323                                           *((uint16_t *)iface_param->value));
 324                 break;
 325         }
 326         return ret;
 327 }
 328
 329
 330 static int
 331 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 332                           struct iscsi_iface_param_info *info,
 333                           void *data, uint32_t dt_len)
 334 {
 335         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 336         u8 *ip = NULL, *subnet = NULL, *gw;
 337         struct nlattr *nla;
 338         int ret = -EPERM;
 339
 340         /* Check the param */
 341         switch (info->param) {
 342         case ISCSI_NET_PARAM_IFACE_ENABLE:
 343                 if (info->value[0] == ISCSI_IFACE_ENABLE)
 344                         ret = beiscsi_iface_create_ipv4(phba);
 345                 else {
 346                         iscsi_destroy_iface(phba->ipv4_iface);
 347                         phba->ipv4_iface = NULL;
 348                 }
 349                 break;
 350         case ISCSI_NET_PARAM_IPV4_GW:
 351                 gw = info->value;
 352                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 353                 break;
 354         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 355                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
 356                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 357                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 358                         /* release DHCP IP address */
 359                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 360                                                    NULL, NULL);
 361                 else
 362                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 363                                     "BS_%d : Invalid BOOTPROTO: %d\n",
 364                                     info->value[0]);
 365                 break;
 366         case ISCSI_NET_PARAM_IPV4_ADDR:
 367                 ip = info->value;
 368                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
 369                 if (nla) {
 370                         info = nla_data(nla);
 371                         subnet = info->value;
 372                 }
 373                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 374                                            ip, subnet);
 375                 break;
 376         case ISCSI_NET_PARAM_IPV4_SUBNET:
 377                 /*
 378                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
 379                  * and subnet both. Find IP to be applied for this subnet.
 380                  */
 381                 subnet = info->value;
 382                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
 383                 if (nla) {
 384                         info = nla_data(nla);
 385                         ip = info->value;
 386                 }
 387                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 388                                            ip, subnet);
 389                 break;
 390         }
 391
 392         return ret;
 393 }
 394
 395 static int
 396 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 397                           struct iscsi_iface_param_info *iface_param,
 398                           void *data, uint32_t dt_len)
 399 {
 400         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 401         int ret = -EPERM;
 402
 403         switch (iface_param->param) {
 404         case ISCSI_NET_PARAM_IFACE_ENABLE:
 405                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
 406                         ret = beiscsi_iface_create_ipv6(phba);
 407                 else {
 408                         iscsi_destroy_iface(phba->ipv6_iface);
 409                         phba->ipv6_iface = NULL;
 410                 }
 411                 break;
 412         case ISCSI_NET_PARAM_IPV6_ADDR:
 413                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 414                                            iface_param->value, NULL);
 415                 break;
 416         }
 417
 418         return ret;
 419 }
 420
 421 int beiscsi_iface_set_param(struct Scsi_Host *shost,
 422                             void *data, uint32_t dt_len)
 423 {
 424         struct iscsi_iface_param_info *iface_param = NULL;
 425         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 426         struct nlattr *attrib;
 427         uint32_t rm_len = dt_len;
 428         int ret;
 429
 430         if (!beiscsi_hba_is_online(phba)) {
 431                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 432                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 433                 return -EBUSY;
 434         }
 435
 436         /* update interface_handle */
 437         ret = beiscsi_if_get_handle(phba);
 438         if (ret) {
 439                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 440                             "BS_%d : Getting Interface Handle Failed\n");
 441                 return ret;
 442         }
 443
 444         nla_for_each_attr(attrib, data, dt_len, rm_len) {
 445                 iface_param = nla_data(attrib);
 446
 447                 if (iface_param->param_type != ISCSI_NET_PARAM)
 448                         continue;
 449
 450                 /*
 451                  * BE2ISCSI only supports 1 interface
 452                  */
 453                 if (iface_param->iface_num) {
 454                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 455                                     "BS_%d : Invalid iface_num %d."
 456                                     "Only iface_num 0 is supported.\n",
 457                                     iface_param->iface_num);
 458
 459                         return -EINVAL;
 460                 }
 461
 462                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 463                             "BS_%d : %s.0 set param %d",
 464                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 465                             "ipv4" : "ipv6", iface_param->param);
 466
 467                 ret = -EPERM;
 468                 switch (iface_param->param) {
 469                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 470                 case ISCSI_NET_PARAM_VLAN_TAG:
 471                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 472                         break;
 473                 default:
 474                         switch (iface_param->iface_type) {
 475                         case ISCSI_IFACE_TYPE_IPV4:
 476                                 ret = beiscsi_iface_config_ipv4(shost,
 477                                                                 iface_param,
 478                                                                 data, dt_len);
 479                                 break;
 480                         case ISCSI_IFACE_TYPE_IPV6:
 481                                 ret = beiscsi_iface_config_ipv6(shost,
 482                                                                 iface_param,
 483                                                                 data, dt_len);
 484                                 break;
 485                         }
 486                 }
 487
 488                 if (ret == -EPERM) {
 489                         __beiscsi_log(phba, KERN_ERR,
 490                                       "BS_%d : %s.0 set param %d not permitted",
 491                                       (iface_param->iface_type ==
 492                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 493                                       iface_param->param);
 494                         ret = 0;
 495                 }
 496                 if (ret)
 497                         break;
 498         }
 499
 500         return ret;
 501 }
 502
 503 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 504                                      struct iscsi_iface *iface,
 505                                      int param, char *buf)
 506 {
 507         struct be_cmd_get_if_info_resp *if_info;
 508         int len, ip_type = BEISCSI_IP_TYPE_V4;
 509
 510         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 511                 ip_type = BEISCSI_IP_TYPE_V6;
 512
 513         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 514         if (len)
 515                 return len;
 516
 517         switch (param) {
 518         case ISCSI_NET_PARAM_IPV4_ADDR:
 519                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 520                 break;
 521         case ISCSI_NET_PARAM_IPV6_ADDR:
 522                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 523                 break;
 524         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 525                 if (!if_info->dhcp_state)
 526                         len = sprintf(buf, "static\n");
 527                 else
 528                         len = sprintf(buf, "dhcp\n");
 529                 break;
 530         case ISCSI_NET_PARAM_IPV4_SUBNET:
 531                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 532                 break;
 533         case ISCSI_NET_PARAM_VLAN_ENABLED:
 534                 len = sprintf(buf, "%s\n",
 535                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 536                               "disable" : "enable");
 537                 break;
 538         case ISCSI_NET_PARAM_VLAN_ID:
 539                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 540                         len = -EINVAL;
 541                 else
 542                         len = sprintf(buf, "%d\n",
 543                                       (if_info->vlan_priority &
 544                                        ISCSI_MAX_VLAN_ID));
 545                 break;
 546         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 547                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 548                         len = -EINVAL;
 549                 else
 550                         len = sprintf(buf, "%d\n",
 551                                       ((if_info->vlan_priority >> 13) &
 552                                        ISCSI_MAX_VLAN_PRIORITY));
 553                 break;
 554         default:
 555                 WARN_ON(1);
 556         }
 557
 558         kfree(if_info);
 559         return len;
 560 }
 561
 562 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 563                             enum iscsi_param_type param_type,
 564                             int param, char *buf)
 565 {
 566         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 567         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 568         struct be_cmd_get_def_gateway_resp gateway;
 569         int len = -EPERM;
 570
 571         if (param_type != ISCSI_NET_PARAM)
 572                 return 0;
 573         if (!beiscsi_hba_is_online(phba)) {
 574                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 575                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 576                 return -EBUSY;
 577         }
 578
 579         switch (param) {
 580         case ISCSI_NET_PARAM_IPV4_ADDR:
 581         case ISCSI_NET_PARAM_IPV4_SUBNET:
 582         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 583         case ISCSI_NET_PARAM_IPV6_ADDR:
 584         case ISCSI_NET_PARAM_VLAN_ENABLED:
 585         case ISCSI_NET_PARAM_VLAN_ID:
 586         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 587                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 588                 break;
 589         case ISCSI_NET_PARAM_IFACE_ENABLE:
 590                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 591                         len = sprintf(buf, "%s\n",
 592                                       phba->ipv4_iface ? "enable" : "disable");
 593                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 594                         len = sprintf(buf, "%s\n",
 595                                       phba->ipv6_iface ? "enable" : "disable");
 596                 break;
 597         case ISCSI_NET_PARAM_IPV4_GW:
 598                 memset(&gateway, 0, sizeof(gateway));
 599                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 600                 if (!len)
 601                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 602                 break;
 603         }
 604
 605         return len;
 606 }
 607
 608 /**
 609  * beiscsi_ep_get_param - get the iscsi parameter
 610  * @ep: pointer to iscsi ep
 611  * @param: parameter type identifier
 612  * @buf: buffer pointer
 613  *
 614  * returns iscsi parameter
 615  */
 616 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 617                            enum iscsi_param param, char *buf)
 618 {
 619         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 620         int len;
 621
 622         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 623                     BEISCSI_LOG_CONFIG,
 624                     "BS_%d : In beiscsi_ep_get_param,"
 625                     " param= %d\n", param);
 626
 627         switch (param) {
 628         case ISCSI_PARAM_CONN_PORT:
 629                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 630                 break;
 631         case ISCSI_PARAM_CONN_ADDRESS:
 632                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 633                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 634                 else
 635                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 636                 break;
 637         default:
 638                 len = -EPERM;
 639         }
 640         return len;
 641 }
 642
 643 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 644                       enum iscsi_param param, char *buf, int buflen)
 645 {
 646         struct iscsi_conn *conn = cls_conn->dd_data;
 647         struct iscsi_session *session = conn->session;
 648         struct beiscsi_hba *phba = NULL;
 649         int ret;
 650
 651         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 652         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 653                     "BS_%d : In beiscsi_conn_set_param,"
 654                     " param= %d\n", param);
 655
 656         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 657         if (ret)
 658                 return ret;
 659         /*
 660          * If userspace tried to set the value to higher than we can
 661          * support override here.
 662          */
 663         switch (param) {
 664         case ISCSI_PARAM_FIRST_BURST:
 665                 if (session->first_burst > 8192)
 666                         session->first_burst = 8192;
 667                 break;
 668         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 669                 if (conn->max_recv_dlength > 65536)
 670                         conn->max_recv_dlength = 65536;
 671                 break;
 672         case ISCSI_PARAM_MAX_BURST:
 673                 if (session->max_burst > 262144)
 674                         session->max_burst = 262144;
 675                 break;
 676         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 677                 if (conn->max_xmit_dlength > 65536)
 678                         conn->max_xmit_dlength = 65536;
 679         default:
 680                 return 0;
 681         }
 682
 683         return 0;
 684 }
 685
 686 /**
 687  * beiscsi_get_initname - Read Initiator Name from flash
 688  * @buf: buffer bointer
 689  * @phba: The device priv structure instance
 690  *
 691  * returns number of bytes
 692  */
 693 static int beiscsi_get_initname(char *buf, struct beiscsi_hba *phba)
 694 {
 695         int rc;
 696         unsigned int tag;
 697         struct be_mcc_wrb *wrb;
 698         struct be_cmd_hba_name *resp;
 699
 700         tag = be_cmd_get_initname(phba);
 701         if (!tag) {
 702                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 703                             "BS_%d : Getting Initiator Name Failed\n");
 704
 705                 return -EBUSY;
 706         }
 707
 708         rc = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
 709         if (rc) {
 710                 beiscsi_log(phba, KERN_ERR,
 711                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
 712                             "BS_%d : Initiator Name MBX Failed\n");
 713                 return rc;
 714         }
 715
 716         resp = embedded_payload(wrb);
 717         rc = sprintf(buf, "%s\n", resp->initiator_name);
 718         return rc;
 719 }
 720
 721 /**
 722  * beiscsi_get_port_state - Get the Port State
 723  * @shost : pointer to scsi_host structure
 724  *
 725  */
 726 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 727 {
 728         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 729         struct iscsi_cls_host *ihost = shost->shost_data;
 730
 731         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
 732                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 733 }
 734
 735 /**
 736  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 737  * @shost : pointer to scsi_host structure
 738  *
 739  */
 740 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 741 {
 742         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 743         struct iscsi_cls_host *ihost = shost->shost_data;
 744
 745         switch (phba->port_speed) {
 746         case BE2ISCSI_LINK_SPEED_10MBPS:
 747                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 748                 break;
 749         case BE2ISCSI_LINK_SPEED_100MBPS:
 750                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 751                 break;
 752         case BE2ISCSI_LINK_SPEED_1GBPS:
 753                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 754                 break;
 755         case BE2ISCSI_LINK_SPEED_10GBPS:
 756                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 757                 break;
 758         case BE2ISCSI_LINK_SPEED_25GBPS:
 759                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 760                 break;
 761         case BE2ISCSI_LINK_SPEED_40GBPS:
 762                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 763                 break;
 764         default:
 765                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 766         }
 767 }
 768
 769 /**
 770  * beiscsi_get_host_param - get the iscsi parameter
 771  * @shost: pointer to scsi_host structure
 772  * @param: parameter type identifier
 773  * @buf: buffer pointer
 774  *
 775  * returns host parameter
 776  */
 777 int beiscsi_get_host_param(struct Scsi_Host *shost,
 778                            enum iscsi_host_param param, char *buf)
 779 {
 780         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 781         int status = 0;
 782
 783         if (!beiscsi_hba_is_online(phba)) {
 784                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 785                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 786                 return -EBUSY;
 787         }
 788         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 789                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
 790
 791         switch (param) {
 792         case ISCSI_HOST_PARAM_HWADDRESS:
 793                 status = beiscsi_get_macaddr(buf, phba);
 794                 if (status < 0) {
 795                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 796                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 797                         return status;
 798                 }
 799                 break;
 800         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 801                 status = beiscsi_get_initname(buf, phba);
 802                 if (status < 0) {
 803                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 804                                     "BS_%d : Retreiving Initiator Name Failed\n");
 805                         return status;
 806                 }
 807                 break;
 808         case ISCSI_HOST_PARAM_PORT_STATE:
 809                 beiscsi_get_port_state(shost);
 810                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 811                 break;
 812         case ISCSI_HOST_PARAM_PORT_SPEED:
 813                 beiscsi_get_port_speed(shost);
 814                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 815                 break;
 816         default:
 817                 return iscsi_host_get_param(shost, param, buf);
 818         }
 819         return status;
 820 }
 821
 822 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 823 {
 824         struct be_cmd_get_nic_conf_resp resp;
 825         int rc;
 826
 827         if (phba->mac_addr_set)
 828                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 829
 830         memset(&resp, 0, sizeof(resp));
 831         rc = mgmt_get_nic_conf(phba, &resp);
 832         if (rc)
 833                 return rc;
 834
 835         phba->mac_addr_set = true;
 836         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 837         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 838 }
 839
 840 /**
 841  * beiscsi_conn_get_stats - get the iscsi stats
 842  * @cls_conn: pointer to iscsi cls conn
 843  * @stats: pointer to iscsi_stats structure
 844  *
 845  * returns iscsi stats
 846  */
 847 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 848                             struct iscsi_stats *stats)
 849 {
 850         struct iscsi_conn *conn = cls_conn->dd_data;
 851         struct beiscsi_hba *phba = NULL;
 852
 853         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 854         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 855                     "BS_%d : In beiscsi_conn_get_stats\n");
 856
 857         stats->txdata_octets = conn->txdata_octets;
 858         stats->rxdata_octets = conn->rxdata_octets;
 859         stats->dataout_pdus = conn->dataout_pdus_cnt;
 860         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 861         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 862         stats->datain_pdus = conn->datain_pdus_cnt;
 863         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 864         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 865         stats->r2t_pdus = conn->r2t_pdus_cnt;
 866         stats->digest_err = 0;
 867         stats->timeout_err = 0;
 868         stats->custom_length = 1;
 869         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 870         stats->custom[0].value = conn->eh_abort_cnt;
 871 }
 872
 873 /**
 874  * beiscsi_set_params_for_offld - get the parameters for offload
 875  * @beiscsi_conn: pointer to beiscsi_conn
 876  * @params: pointer to offload_params structure
 877  */
 878 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 879                                           struct beiscsi_offload_params *params)
 880 {
 881         struct iscsi_conn *conn = beiscsi_conn->conn;
 882         struct iscsi_session *session = conn->session;
 883
 884         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 885                       params, session->max_burst);
 886         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 887                       max_send_data_segment_length, params,
 888                       conn->max_xmit_dlength);
 889         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 890                       params, session->first_burst);
 891         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 892                       session->erl);
 893         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 894                       conn->datadgst_en);
 895         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 896                       conn->hdrdgst_en);
 897         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 898                       session->initial_r2t_en);
 899         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 900                       session->imm_data_en);
 901         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 902                       data_seq_inorder, params,
 903                       session->dataseq_inorder_en);
 904         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 905                       pdu_seq_inorder, params,
 906                       session->pdu_inorder_en);
 907         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 908                       session->max_r2t);
 909         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 910                       (conn->exp_statsn - 1));
 911         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 912                       max_recv_data_segment_length, params,
 913                       conn->max_recv_dlength);
 914
 915 }
 916
 917 /**
 918  * beiscsi_conn_start - offload of session to chip
 919  * @cls_conn: pointer to beiscsi_conn
 920  */
 921 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 922 {
 923         struct iscsi_conn *conn = cls_conn->dd_data;
 924         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 925         struct beiscsi_endpoint *beiscsi_ep;
 926         struct beiscsi_offload_params params;
 927         struct beiscsi_hba *phba;
 928
 929         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 930
 931         if (!beiscsi_hba_is_online(phba)) {
 932                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 933                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 934                 return -EBUSY;
 935         }
 936         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 937                     "BS_%d : In beiscsi_conn_start\n");
 938
 939         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 940         beiscsi_ep = beiscsi_conn->ep;
 941         if (!beiscsi_ep)
 942                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 943                             BEISCSI_LOG_CONFIG,
 944                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 945
 946         beiscsi_conn->login_in_progress = 0;
 947         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 948         beiscsi_offload_connection(beiscsi_conn, &params);
 949         iscsi_conn_start(cls_conn);
 950         return 0;
 951 }
 952
 953 /**
 954  * beiscsi_get_cid - Allocate a cid
 955  * @phba: The phba instance
 956  */
 957 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 958 {
 959         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 960         unsigned short cid, cid_from_ulp;
 961         struct ulp_cid_info *cid_info;
 962
 963         /* Find the ULP which has more CID available */
 964         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 965                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 966         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 967                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 968         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 969                         BEISCSI_ULP0 : BEISCSI_ULP1;
 970         /**
 971          * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
 972          * is ZERO for both, ULP 1 is returned.
 973          * Check if ULP is loaded before getting new CID.
 974          */
 975         if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
 976                 return BE_INVALID_CID;
 977
 978         cid_info = phba->cid_array_info[cid_from_ulp];
 979         cid = cid_info->cid_array[cid_info->cid_alloc];
 980         if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
 981                 __beiscsi_log(phba, KERN_ERR,
 982                                 "BS_%d : failed to get cid: available %u:%u\n",
 983                                 cid_info->avlbl_cids, cid_info->cid_free);
 984                 return BE_INVALID_CID;
 985         }
 986         /* empty the slot */
 987         cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
 988         if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
 989                 cid_info->cid_alloc = 0;
 990         cid_info->avlbl_cids--;
 991         return cid;
 992 }
 993
 994 /**
 995  * beiscsi_put_cid - Free the cid
 996  * @phba: The phba for which the cid is being freed
 997  * @cid: The cid to free
 998  */
 999 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
1000 {
1001         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
1002         struct hwi_wrb_context *pwrb_context;
1003         struct hwi_controller *phwi_ctrlr;
1004         struct ulp_cid_info *cid_info;
1005         uint16_t cid_post_ulp;
1006
1007         phwi_ctrlr = phba->phwi_ctrlr;
1008         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
1009         cid_post_ulp = pwrb_context->ulp_num;
1010
1011         cid_info = phba->cid_array_info[cid_post_ulp];
1012         /* fill only in empty slot */
1013         if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
1014                 __beiscsi_log(phba, KERN_ERR,
1015                               "BS_%d : failed to put cid %u: available %u:%u\n",
1016                               cid, cid_info->avlbl_cids, cid_info->cid_free);
1017                 return;
1018         }
1019         cid_info->cid_array[cid_info->cid_free++] = cid;
1020         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
1021                 cid_info->cid_free = 0;
1022         cid_info->avlbl_cids++;
1023 }
1024
1025 /**
1026  * beiscsi_free_ep - free endpoint
1027  * @ep: pointer to iscsi endpoint structure
1028  */
1029 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1030 {
1031         struct beiscsi_hba *phba = beiscsi_ep->phba;
1032         struct beiscsi_conn *beiscsi_conn;
1033
1034         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1035         beiscsi_ep->phba = NULL;
1036         /* clear this to track freeing in beiscsi_ep_disconnect */
1037         phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1038
1039         /**
1040          * Check if any connection resource allocated by driver
1041          * is to be freed.This case occurs when target redirection
1042          * or connection retry is done.
1043          **/
1044         if (!beiscsi_ep->conn)
1045                 return;
1046
1047         beiscsi_conn = beiscsi_ep->conn;
1048         /**
1049          * Break ep->conn link here so that completions after
1050          * this are ignored.
1051          */
1052         beiscsi_ep->conn = NULL;
1053         if (beiscsi_conn->login_in_progress) {
1054                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1055                                                beiscsi_conn->task);
1056                 beiscsi_conn->login_in_progress = 0;
1057         }
1058 }
1059
1060 /**
1061  * beiscsi_open_conn - Ask FW to open a TCP connection
1062  * @ep: endpoint to be used
1063  * @src_addr: The source IP address
1064  * @dst_addr: The Destination  IP address
1065  *
1066  * Asks the FW to open a TCP connection
1067  */
1068 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1069                              struct sockaddr *src_addr,
1070                              struct sockaddr *dst_addr, int non_blocking)
1071 {
1072         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1073         struct beiscsi_hba *phba = beiscsi_ep->phba;
1074         struct tcp_connect_and_offload_out *ptcpcnct_out;
1075         struct be_dma_mem nonemb_cmd;
1076         unsigned int tag, req_memsize;
1077         int ret = -ENOMEM;
1078
1079         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1080                     "BS_%d : In beiscsi_open_conn\n");
1081
1082         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1083         if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1084                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1085                             "BS_%d : No free cid available\n");
1086                 return ret;
1087         }
1088
1089         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1090                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1091                     beiscsi_ep->ep_cid);
1092
1093         phba->ep_array[BE_GET_CRI_FROM_CID
1094                        (beiscsi_ep->ep_cid)] = ep;
1095
1096         beiscsi_ep->cid_vld = 0;
1097
1098         if (is_chip_be2_be3r(phba))
1099                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1100         else
1101                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1102
1103         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
1104                                 req_memsize,
1105                                 &nonemb_cmd.dma);
1106         if (nonemb_cmd.va == NULL) {
1107
1108                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1109                             "BS_%d : Failed to allocate memory for"
1110                             " mgmt_open_connection\n");
1111
1112                 beiscsi_free_ep(beiscsi_ep);
1113                 return -ENOMEM;
1114         }
1115         nonemb_cmd.size = req_memsize;
1116         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1117         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1118         if (!tag) {
1119                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1120                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1121                             beiscsi_ep->ep_cid);
1122
1123                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1124                                     nonemb_cmd.va, nonemb_cmd.dma);
1125                 beiscsi_free_ep(beiscsi_ep);
1126                 return -EAGAIN;
1127         }
1128
1129         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1130         if (ret) {
1131                 beiscsi_log(phba, KERN_ERR,
1132                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1133                             "BS_%d : mgmt_open_connection Failed");
1134
1135                 if (ret != -EBUSY)
1136                         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1137                                             nonemb_cmd.va, nonemb_cmd.dma);
1138
1139                 beiscsi_free_ep(beiscsi_ep);
1140                 return ret;
1141         }
1142
1143         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1144         beiscsi_ep = ep->dd_data;
1145         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1146         beiscsi_ep->cid_vld = 1;
1147         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1148                     "BS_%d : mgmt_open_connection Success\n");
1149
1150         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1151                             nonemb_cmd.va, nonemb_cmd.dma);
1152         return 0;
1153 }
1154
1155 /**
1156  * beiscsi_ep_connect - Ask chip to create TCP Conn
1157  * @scsi_host: Pointer to scsi_host structure
1158  * @dst_addr: The IP address of Target
1159  * @non_blocking: blocking or non-blocking call
1160  *
1161  * This routines first asks chip to create a connection and then allocates an EP
1162  */
1163 struct iscsi_endpoint *
1164 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1165                    int non_blocking)
1166 {
1167         struct beiscsi_hba *phba;
1168         struct beiscsi_endpoint *beiscsi_ep;
1169         struct iscsi_endpoint *ep;
1170         int ret;
1171
1172         if (!shost) {
1173                 ret = -ENXIO;
1174                 pr_err("beiscsi_ep_connect shost is NULL\n");
1175                 return ERR_PTR(ret);
1176         }
1177
1178         phba = iscsi_host_priv(shost);
1179         if (!beiscsi_hba_is_online(phba)) {
1180                 ret = -EIO;
1181                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1182                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1183                 return ERR_PTR(ret);
1184         }
1185         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1186                 ret = -EBUSY;
1187                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1188                             "BS_%d : The Adapter Port state is Down!!!\n");
1189                 return ERR_PTR(ret);
1190         }
1191
1192         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1193         if (!ep) {
1194                 ret = -ENOMEM;
1195                 return ERR_PTR(ret);
1196         }
1197
1198         beiscsi_ep = ep->dd_data;
1199         beiscsi_ep->phba = phba;
1200         beiscsi_ep->openiscsi_ep = ep;
1201         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1202         if (ret) {
1203                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1204                             "BS_%d : Failed in beiscsi_open_conn\n");
1205                 goto free_ep;
1206         }
1207
1208         return ep;
1209
1210 free_ep:
1211         iscsi_destroy_endpoint(ep);
1212         return ERR_PTR(ret);
1213 }
1214
1215 /**
1216  * beiscsi_ep_poll - Poll to see if connection is established
1217  * @ep: endpoint to be used
1218  * @timeout_ms: timeout specified in millisecs
1219  *
1220  * Poll to see if TCP connection established
1221  */
1222 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1223 {
1224         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1225
1226         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1227                     "BS_%d : In  beiscsi_ep_poll\n");
1228
1229         if (beiscsi_ep->cid_vld == 1)
1230                 return 1;
1231         else
1232                 return 0;
1233 }
1234
1235 /**
1236  * beiscsi_flush_cq()- Flush the CQ created.
1237  * @phba: ptr device priv structure.
1238  *
1239  * Before the connection resource are freed flush
1240  * all the CQ enteries
1241  **/
1242 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1243 {
1244         uint16_t i;
1245         struct be_eq_obj *pbe_eq;
1246         struct hwi_controller *phwi_ctrlr;
1247         struct hwi_context_memory *phwi_context;
1248
1249         phwi_ctrlr = phba->phwi_ctrlr;
1250         phwi_context = phwi_ctrlr->phwi_ctxt;
1251
1252         for (i = 0; i < phba->num_cpus; i++) {
1253                 pbe_eq = &phwi_context->be_eq[i];
1254                 irq_poll_disable(&pbe_eq->iopoll);
1255                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1256                 irq_poll_enable(&pbe_eq->iopoll);
1257         }
1258 }
1259
1260 /**
1261  * beiscsi_conn_close - Invalidate and upload connection
1262  * @ep: The iscsi endpoint
1263  *
1264  * Returns 0 on success,  -1 on failure.
1265  */
1266 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1267 {
1268         struct beiscsi_hba *phba = beiscsi_ep->phba;
1269         unsigned int tag, attempts;
1270         int ret;
1271
1272         /**
1273          * Without successfully invalidating and uploading connection
1274          * driver can't reuse the CID so attempt more than once.
1275          */
1276         attempts = 0;
1277         while (attempts++ < 3) {
1278                 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1279                 if (tag) {
1280                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1281                         if (!ret)
1282                                 break;
1283                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1284                                     "BS_%d : invalidate conn failed cid %d\n",
1285                                     beiscsi_ep->ep_cid);
1286                 }
1287         }
1288
1289         /* wait for all completions to arrive, then process them */
1290         msleep(250);
1291         /* flush CQ entries */
1292         beiscsi_flush_cq(phba);
1293
1294         if (attempts > 3)
1295                 return -1;
1296
1297         attempts = 0;
1298         while (attempts++ < 3) {
1299                 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1300                 if (tag) {
1301                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1302                         if (!ret)
1303                                 break;
1304                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1305                                     "BS_%d : upload conn failed cid %d\n",
1306                                     beiscsi_ep->ep_cid);
1307                 }
1308         }
1309         if (attempts > 3)
1310                 return -1;
1311
1312         return 0;
1313 }
1314
1315 /**
1316  * beiscsi_ep_disconnect - Tears down the TCP connection
1317  * @ep: endpoint to be used
1318  *
1319  * Tears down the TCP connection
1320  */
1321 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1322 {
1323         struct beiscsi_endpoint *beiscsi_ep;
1324         struct beiscsi_conn *beiscsi_conn;
1325         struct beiscsi_hba *phba;
1326         uint16_t cri_index;
1327
1328         beiscsi_ep = ep->dd_data;
1329         phba = beiscsi_ep->phba;
1330         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1331                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1332                     beiscsi_ep->ep_cid);
1333
1334         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1335         if (!phba->ep_array[cri_index]) {
1336                 __beiscsi_log(phba, KERN_ERR,
1337                               "BS_%d : ep_array at %u cid %u empty\n",
1338                               cri_index,
1339                               beiscsi_ep->ep_cid);
1340                 return;
1341         }
1342
1343         if (beiscsi_ep->conn) {
1344                 beiscsi_conn = beiscsi_ep->conn;
1345                 iscsi_suspend_queue(beiscsi_conn->conn);
1346         }
1347
1348         if (!beiscsi_hba_is_online(phba)) {
1349                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1350                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1351         } else {
1352                 /**
1353                  * Make CID available even if close fails.
1354                  * If not freed, FW might fail open using the CID.
1355                  */
1356                 if (beiscsi_conn_close(beiscsi_ep) < 0)
1357                         __beiscsi_log(phba, KERN_ERR,
1358                                       "BS_%d : close conn failed cid %d\n",
1359                                       beiscsi_ep->ep_cid);
1360         }
1361
1362         beiscsi_free_ep(beiscsi_ep);
1363         if (!phba->conn_table[cri_index])
1364                 __beiscsi_log(phba, KERN_ERR,
1365                               "BS_%d : conn_table empty at %u: cid %u\n",
1366                               cri_index, beiscsi_ep->ep_cid);
1367         phba->conn_table[cri_index] = NULL;
1368         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1369 }
1370
1371 umode_t beiscsi_attr_is_visible(int param_type, int param)
1372 {
1373         switch (param_type) {
1374         case ISCSI_NET_PARAM:
1375                 switch (param) {
1376                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1377                 case ISCSI_NET_PARAM_IPV4_ADDR:
1378                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1379                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1380                 case ISCSI_NET_PARAM_IPV4_GW:
1381                 case ISCSI_NET_PARAM_IPV6_ADDR:
1382                 case ISCSI_NET_PARAM_VLAN_ID:
1383                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1384                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1385                         return S_IRUGO;
1386                 default:
1387                         return 0;
1388                 }
1389         case ISCSI_HOST_PARAM:
1390                 switch (param) {
1391                 case ISCSI_HOST_PARAM_HWADDRESS:
1392                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1393                 case ISCSI_HOST_PARAM_PORT_STATE:
1394                 case ISCSI_HOST_PARAM_PORT_SPEED:
1395                         return S_IRUGO;
1396                 default:
1397                         return 0;
1398                 }
1399         case ISCSI_PARAM:
1400                 switch (param) {
1401                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1402                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1403                 case ISCSI_PARAM_HDRDGST_EN:
1404                 case ISCSI_PARAM_DATADGST_EN:
1405                 case ISCSI_PARAM_CONN_ADDRESS:
1406                 case ISCSI_PARAM_CONN_PORT:
1407                 case ISCSI_PARAM_EXP_STATSN:
1408                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1409                 case ISCSI_PARAM_PERSISTENT_PORT:
1410                 case ISCSI_PARAM_PING_TMO:
1411                 case ISCSI_PARAM_RECV_TMO:
1412                 case ISCSI_PARAM_INITIAL_R2T_EN:
1413                 case ISCSI_PARAM_MAX_R2T:
1414                 case ISCSI_PARAM_IMM_DATA_EN:
1415                 case ISCSI_PARAM_FIRST_BURST:
1416                 case ISCSI_PARAM_MAX_BURST:
1417                 case ISCSI_PARAM_PDU_INORDER_EN:
1418                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1419                 case ISCSI_PARAM_ERL:
1420                 case ISCSI_PARAM_TARGET_NAME:
1421                 case ISCSI_PARAM_TPGT:
1422                 case ISCSI_PARAM_USERNAME:
1423                 case ISCSI_PARAM_PASSWORD:
1424                 case ISCSI_PARAM_USERNAME_IN:
1425                 case ISCSI_PARAM_PASSWORD_IN:
1426                 case ISCSI_PARAM_FAST_ABORT:
1427                 case ISCSI_PARAM_ABORT_TMO:
1428                 case ISCSI_PARAM_LU_RESET_TMO:
1429                 case ISCSI_PARAM_IFACE_NAME:
1430                 case ISCSI_PARAM_INITIATOR_NAME:
1431                         return S_IRUGO;
1432                 default:
1433                         return 0;
1434                 }
1435         }
1436
1437         return 0;
1438 }