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