drivers/scsi/be2iscsi/be_iscsi.c

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