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