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                 /* ignore nla_type as it is never used */
 449                 if (nla_len(attrib) < sizeof(*iface_param))
 450                         return -EINVAL;
 451
 452                 iface_param = nla_data(attrib);
 453
 454                 if (iface_param->param_type != ISCSI_NET_PARAM)
 455                         continue;
 456
 457                 /*
 458                  * BE2ISCSI only supports 1 interface
 459                  */
 460                 if (iface_param->iface_num) {
 461                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 462                                     "BS_%d : Invalid iface_num %d."
 463                                     "Only iface_num 0 is supported.\n",
 464                                     iface_param->iface_num);
 465
 466                         return -EINVAL;
 467                 }
 468
 469                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 470                             "BS_%d : %s.0 set param %d",
 471                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 472                             "ipv4" : "ipv6", iface_param->param);
 473
 474                 ret = -EPERM;
 475                 switch (iface_param->param) {
 476                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 477                 case ISCSI_NET_PARAM_VLAN_TAG:
 478                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 479                         break;
 480                 default:
 481                         switch (iface_param->iface_type) {
 482                         case ISCSI_IFACE_TYPE_IPV4:
 483                                 ret = beiscsi_iface_config_ipv4(shost,
 484                                                                 iface_param,
 485                                                                 data, dt_len);
 486                                 break;
 487                         case ISCSI_IFACE_TYPE_IPV6:
 488                                 ret = beiscsi_iface_config_ipv6(shost,
 489                                                                 iface_param,
 490                                                                 data, dt_len);
 491                                 break;
 492                         }
 493                 }
 494
 495                 if (ret == -EPERM) {
 496                         __beiscsi_log(phba, KERN_ERR,
 497                                       "BS_%d : %s.0 set param %d not permitted",
 498                                       (iface_param->iface_type ==
 499                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 500                                       iface_param->param);
 501                         ret = 0;
 502                 }
 503                 if (ret)
 504                         break;
 505         }
 506
 507         return ret;
 508 }
 509
 510 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 511                                      struct iscsi_iface *iface,
 512                                      int param, char *buf)
 513 {
 514         struct be_cmd_get_if_info_resp *if_info;
 515         int len, ip_type = BEISCSI_IP_TYPE_V4;
 516
 517         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 518                 ip_type = BEISCSI_IP_TYPE_V6;
 519
 520         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 521         if (len)
 522                 return len;
 523
 524         switch (param) {
 525         case ISCSI_NET_PARAM_IPV4_ADDR:
 526                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 527                 break;
 528         case ISCSI_NET_PARAM_IPV6_ADDR:
 529                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 530                 break;
 531         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 532                 if (!if_info->dhcp_state)
 533                         len = sprintf(buf, "static\n");
 534                 else
 535                         len = sprintf(buf, "dhcp\n");
 536                 break;
 537         case ISCSI_NET_PARAM_IPV4_SUBNET:
 538                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 539                 break;
 540         case ISCSI_NET_PARAM_VLAN_ENABLED:
 541                 len = sprintf(buf, "%s\n",
 542                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 543                               "disable" : "enable");
 544                 break;
 545         case ISCSI_NET_PARAM_VLAN_ID:
 546                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 547                         len = -EINVAL;
 548                 else
 549                         len = sprintf(buf, "%d\n",
 550                                       (if_info->vlan_priority &
 551                                        ISCSI_MAX_VLAN_ID));
 552                 break;
 553         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 554                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 555                         len = -EINVAL;
 556                 else
 557                         len = sprintf(buf, "%d\n",
 558                                       ((if_info->vlan_priority >> 13) &
 559                                        ISCSI_MAX_VLAN_PRIORITY));
 560                 break;
 561         default:
 562                 WARN_ON(1);
 563         }
 564
 565         kfree(if_info);
 566         return len;
 567 }
 568
 569 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 570                             enum iscsi_param_type param_type,
 571                             int param, char *buf)
 572 {
 573         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 574         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 575         struct be_cmd_get_def_gateway_resp gateway;
 576         int len = -EPERM;
 577
 578         if (param_type != ISCSI_NET_PARAM)
 579                 return 0;
 580         if (!beiscsi_hba_is_online(phba)) {
 581                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 582                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 583                 return -EBUSY;
 584         }
 585
 586         switch (param) {
 587         case ISCSI_NET_PARAM_IPV4_ADDR:
 588         case ISCSI_NET_PARAM_IPV4_SUBNET:
 589         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 590         case ISCSI_NET_PARAM_IPV6_ADDR:
 591         case ISCSI_NET_PARAM_VLAN_ENABLED:
 592         case ISCSI_NET_PARAM_VLAN_ID:
 593         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 594                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 595                 break;
 596         case ISCSI_NET_PARAM_IFACE_ENABLE:
 597                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 598                         len = sprintf(buf, "%s\n",
 599                                       phba->ipv4_iface ? "enable" : "disable");
 600                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 601                         len = sprintf(buf, "%s\n",
 602                                       phba->ipv6_iface ? "enable" : "disable");
 603                 break;
 604         case ISCSI_NET_PARAM_IPV4_GW:
 605                 memset(&gateway, 0, sizeof(gateway));
 606                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 607                 if (!len)
 608                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 609                 break;
 610         }
 611
 612         return len;
 613 }
 614
 615 /**
 616  * beiscsi_ep_get_param - get the iscsi parameter
 617  * @ep: pointer to iscsi ep
 618  * @param: parameter type identifier
 619  * @buf: buffer pointer
 620  *
 621  * returns iscsi parameter
 622  */
 623 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 624                            enum iscsi_param param, char *buf)
 625 {
 626         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 627         int len;
 628
 629         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 630                     BEISCSI_LOG_CONFIG,
 631                     "BS_%d : In beiscsi_ep_get_param,"
 632                     " param= %d\n", param);
 633
 634         switch (param) {
 635         case ISCSI_PARAM_CONN_PORT:
 636                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 637                 break;
 638         case ISCSI_PARAM_CONN_ADDRESS:
 639                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 640                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 641                 else
 642                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 643                 break;
 644         default:
 645                 len = -EPERM;
 646         }
 647         return len;
 648 }
 649
 650 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 651                       enum iscsi_param param, char *buf, int buflen)
 652 {
 653         struct iscsi_conn *conn = cls_conn->dd_data;
 654         struct iscsi_session *session = conn->session;
 655         struct beiscsi_hba *phba = NULL;
 656         int ret;
 657
 658         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 659         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 660                     "BS_%d : In beiscsi_conn_set_param,"
 661                     " param= %d\n", param);
 662
 663         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 664         if (ret)
 665                 return ret;
 666         /*
 667          * If userspace tried to set the value to higher than we can
 668          * support override here.
 669          */
 670         switch (param) {
 671         case ISCSI_PARAM_FIRST_BURST:
 672                 if (session->first_burst > 8192)
 673                         session->first_burst = 8192;
 674                 break;
 675         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 676                 if (conn->max_recv_dlength > 65536)
 677                         conn->max_recv_dlength = 65536;
 678                 break;
 679         case ISCSI_PARAM_MAX_BURST:
 680                 if (session->max_burst > 262144)
 681                         session->max_burst = 262144;
 682                 break;
 683         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 684                 if (conn->max_xmit_dlength > 65536)
 685                         conn->max_xmit_dlength = 65536;
 686         default:
 687                 return 0;
 688         }
 689
 690         return 0;
 691 }
 692
 693 /**
 694  * beiscsi_get_port_state - Get the Port State
 695  * @shost : pointer to scsi_host structure
 696  *
 697  */
 698 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 699 {
 700         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 701         struct iscsi_cls_host *ihost = shost->shost_data;
 702
 703         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
 704                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 705 }
 706
 707 /**
 708  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 709  * @shost : pointer to scsi_host structure
 710  *
 711  */
 712 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 713 {
 714         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 715         struct iscsi_cls_host *ihost = shost->shost_data;
 716
 717         switch (phba->port_speed) {
 718         case BE2ISCSI_LINK_SPEED_10MBPS:
 719                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 720                 break;
 721         case BE2ISCSI_LINK_SPEED_100MBPS:
 722                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 723                 break;
 724         case BE2ISCSI_LINK_SPEED_1GBPS:
 725                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 726                 break;
 727         case BE2ISCSI_LINK_SPEED_10GBPS:
 728                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 729                 break;
 730         case BE2ISCSI_LINK_SPEED_25GBPS:
 731                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 732                 break;
 733         case BE2ISCSI_LINK_SPEED_40GBPS:
 734                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 735                 break;
 736         default:
 737                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 738         }
 739 }
 740
 741 /**
 742  * beiscsi_get_host_param - get the iscsi parameter
 743  * @shost: pointer to scsi_host structure
 744  * @param: parameter type identifier
 745  * @buf: buffer pointer
 746  *
 747  */
 748 int beiscsi_get_host_param(struct Scsi_Host *shost,
 749                            enum iscsi_host_param param, char *buf)
 750 {
 751         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 752         int status = 0;
 753
 754         if (!beiscsi_hba_is_online(phba)) {
 755                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 756                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 757                 return 0;
 758         }
 759         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 760                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
 761
 762         switch (param) {
 763         case ISCSI_HOST_PARAM_HWADDRESS:
 764                 status = beiscsi_get_macaddr(buf, phba);
 765                 if (status < 0) {
 766                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 767                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 768                         return 0;
 769                 }
 770                 break;
 771         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 772                 /* try fetching user configured name first */
 773                 status = beiscsi_get_initiator_name(phba, buf, true);
 774                 if (status < 0) {
 775                         status = beiscsi_get_initiator_name(phba, buf, false);
 776                         if (status < 0) {
 777                                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 778                                             "BS_%d : Retreiving Initiator Name Failed\n");
 779                                 status = 0;
 780                         }
 781                 }
 782                 break;
 783         case ISCSI_HOST_PARAM_PORT_STATE:
 784                 beiscsi_get_port_state(shost);
 785                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 786                 break;
 787         case ISCSI_HOST_PARAM_PORT_SPEED:
 788                 beiscsi_get_port_speed(shost);
 789                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 790                 break;
 791         default:
 792                 return iscsi_host_get_param(shost, param, buf);
 793         }
 794         return status;
 795 }
 796
 797 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 798 {
 799         struct be_cmd_get_nic_conf_resp resp;
 800         int rc;
 801
 802         if (phba->mac_addr_set)
 803                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 804
 805         memset(&resp, 0, sizeof(resp));
 806         rc = mgmt_get_nic_conf(phba, &resp);
 807         if (rc)
 808                 return rc;
 809
 810         phba->mac_addr_set = true;
 811         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 812         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 813 }
 814
 815 /**
 816  * beiscsi_conn_get_stats - get the iscsi stats
 817  * @cls_conn: pointer to iscsi cls conn
 818  * @stats: pointer to iscsi_stats structure
 819  *
 820  * returns iscsi stats
 821  */
 822 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 823                             struct iscsi_stats *stats)
 824 {
 825         struct iscsi_conn *conn = cls_conn->dd_data;
 826         struct beiscsi_hba *phba = NULL;
 827
 828         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 829         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 830                     "BS_%d : In beiscsi_conn_get_stats\n");
 831
 832         stats->txdata_octets = conn->txdata_octets;
 833         stats->rxdata_octets = conn->rxdata_octets;
 834         stats->dataout_pdus = conn->dataout_pdus_cnt;
 835         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 836         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 837         stats->datain_pdus = conn->datain_pdus_cnt;
 838         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 839         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 840         stats->r2t_pdus = conn->r2t_pdus_cnt;
 841         stats->digest_err = 0;
 842         stats->timeout_err = 0;
 843         stats->custom_length = 1;
 844         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 845         stats->custom[0].value = conn->eh_abort_cnt;
 846 }
 847
 848 /**
 849  * beiscsi_set_params_for_offld - get the parameters for offload
 850  * @beiscsi_conn: pointer to beiscsi_conn
 851  * @params: pointer to offload_params structure
 852  */
 853 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 854                                           struct beiscsi_offload_params *params)
 855 {
 856         struct iscsi_conn *conn = beiscsi_conn->conn;
 857         struct iscsi_session *session = conn->session;
 858
 859         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 860                       params, session->max_burst);
 861         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 862                       max_send_data_segment_length, params,
 863                       conn->max_xmit_dlength);
 864         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 865                       params, session->first_burst);
 866         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 867                       session->erl);
 868         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 869                       conn->datadgst_en);
 870         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 871                       conn->hdrdgst_en);
 872         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 873                       session->initial_r2t_en);
 874         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 875                       session->imm_data_en);
 876         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 877                       data_seq_inorder, params,
 878                       session->dataseq_inorder_en);
 879         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 880                       pdu_seq_inorder, params,
 881                       session->pdu_inorder_en);
 882         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 883                       session->max_r2t);
 884         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 885                       (conn->exp_statsn - 1));
 886         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 887                       max_recv_data_segment_length, params,
 888                       conn->max_recv_dlength);
 889
 890 }
 891
 892 /**
 893  * beiscsi_conn_start - offload of session to chip
 894  * @cls_conn: pointer to beiscsi_conn
 895  */
 896 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 897 {
 898         struct iscsi_conn *conn = cls_conn->dd_data;
 899         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 900         struct beiscsi_endpoint *beiscsi_ep;
 901         struct beiscsi_offload_params params;
 902         struct beiscsi_hba *phba;
 903
 904         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 905
 906         if (!beiscsi_hba_is_online(phba)) {
 907                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 908                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 909                 return -EBUSY;
 910         }
 911         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 912                     "BS_%d : In beiscsi_conn_start\n");
 913
 914         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 915         beiscsi_ep = beiscsi_conn->ep;
 916         if (!beiscsi_ep)
 917                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 918                             BEISCSI_LOG_CONFIG,
 919                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 920
 921         beiscsi_conn->login_in_progress = 0;
 922         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 923         beiscsi_offload_connection(beiscsi_conn, &params);
 924         iscsi_conn_start(cls_conn);
 925         return 0;
 926 }
 927
 928 /**
 929  * beiscsi_get_cid - Allocate a cid
 930  * @phba: The phba instance
 931  */
 932 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 933 {
 934         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 935         unsigned short cid, cid_from_ulp;
 936         struct ulp_cid_info *cid_info;
 937
 938         /* Find the ULP which has more CID available */
 939         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 940                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 941         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 942                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 943         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 944                         BEISCSI_ULP0 : BEISCSI_ULP1;
 945         /**
 946          * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
 947          * is ZERO for both, ULP 1 is returned.
 948          * Check if ULP is loaded before getting new CID.
 949          */
 950         if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
 951                 return BE_INVALID_CID;
 952
 953         cid_info = phba->cid_array_info[cid_from_ulp];
 954         cid = cid_info->cid_array[cid_info->cid_alloc];
 955         if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
 956                 __beiscsi_log(phba, KERN_ERR,
 957                                 "BS_%d : failed to get cid: available %u:%u\n",
 958                                 cid_info->avlbl_cids, cid_info->cid_free);
 959                 return BE_INVALID_CID;
 960         }
 961         /* empty the slot */
 962         cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
 963         if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
 964                 cid_info->cid_alloc = 0;
 965         cid_info->avlbl_cids--;
 966         return cid;
 967 }
 968
 969 /**
 970  * beiscsi_put_cid - Free the cid
 971  * @phba: The phba for which the cid is being freed
 972  * @cid: The cid to free
 973  */
 974 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 975 {
 976         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
 977         struct hwi_wrb_context *pwrb_context;
 978         struct hwi_controller *phwi_ctrlr;
 979         struct ulp_cid_info *cid_info;
 980         uint16_t cid_post_ulp;
 981
 982         phwi_ctrlr = phba->phwi_ctrlr;
 983         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 984         cid_post_ulp = pwrb_context->ulp_num;
 985
 986         cid_info = phba->cid_array_info[cid_post_ulp];
 987         /* fill only in empty slot */
 988         if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
 989                 __beiscsi_log(phba, KERN_ERR,
 990                               "BS_%d : failed to put cid %u: available %u:%u\n",
 991                               cid, cid_info->avlbl_cids, cid_info->cid_free);
 992                 return;
 993         }
 994         cid_info->cid_array[cid_info->cid_free++] = cid;
 995         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
 996                 cid_info->cid_free = 0;
 997         cid_info->avlbl_cids++;
 998 }
 999
1000 /**
1001  * beiscsi_free_ep - free endpoint
1002  * @ep: pointer to iscsi endpoint structure
1003  */
1004 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1005 {
1006         struct beiscsi_hba *phba = beiscsi_ep->phba;
1007         struct beiscsi_conn *beiscsi_conn;
1008
1009         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1010         beiscsi_ep->phba = NULL;
1011         /* clear this to track freeing in beiscsi_ep_disconnect */
1012         phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1013
1014         /**
1015          * Check if any connection resource allocated by driver
1016          * is to be freed.This case occurs when target redirection
1017          * or connection retry is done.
1018          **/
1019         if (!beiscsi_ep->conn)
1020                 return;
1021
1022         beiscsi_conn = beiscsi_ep->conn;
1023         /**
1024          * Break ep->conn link here so that completions after
1025          * this are ignored.
1026          */
1027         beiscsi_ep->conn = NULL;
1028         if (beiscsi_conn->login_in_progress) {
1029                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1030                                                beiscsi_conn->task);
1031                 beiscsi_conn->login_in_progress = 0;
1032         }
1033 }
1034
1035 /**
1036  * beiscsi_open_conn - Ask FW to open a TCP connection
1037  * @ep: endpoint to be used
1038  * @src_addr: The source IP address
1039  * @dst_addr: The Destination  IP address
1040  *
1041  * Asks the FW to open a TCP connection
1042  */
1043 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1044                              struct sockaddr *src_addr,
1045                              struct sockaddr *dst_addr, int non_blocking)
1046 {
1047         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1048         struct beiscsi_hba *phba = beiscsi_ep->phba;
1049         struct tcp_connect_and_offload_out *ptcpcnct_out;
1050         struct be_dma_mem nonemb_cmd;
1051         unsigned int tag, req_memsize;
1052         int ret = -ENOMEM;
1053
1054         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1055                     "BS_%d : In beiscsi_open_conn\n");
1056
1057         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1058         if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1059                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1060                             "BS_%d : No free cid available\n");
1061                 return ret;
1062         }
1063
1064         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1065                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1066                     beiscsi_ep->ep_cid);
1067
1068         phba->ep_array[BE_GET_CRI_FROM_CID
1069                        (beiscsi_ep->ep_cid)] = ep;
1070
1071         beiscsi_ep->cid_vld = 0;
1072
1073         if (is_chip_be2_be3r(phba))
1074                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1075         else
1076                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1077
1078         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
1079                                 req_memsize,
1080                                 &nonemb_cmd.dma);
1081         if (nonemb_cmd.va == NULL) {
1082
1083                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1084                             "BS_%d : Failed to allocate memory for"
1085                             " mgmt_open_connection\n");
1086
1087                 beiscsi_free_ep(beiscsi_ep);
1088                 return -ENOMEM;
1089         }
1090         nonemb_cmd.size = req_memsize;
1091         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1092         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1093         if (!tag) {
1094                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1095                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1096                             beiscsi_ep->ep_cid);
1097
1098                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1099                                     nonemb_cmd.va, nonemb_cmd.dma);
1100                 beiscsi_free_ep(beiscsi_ep);
1101                 return -EAGAIN;
1102         }
1103
1104         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1105         if (ret) {
1106                 beiscsi_log(phba, KERN_ERR,
1107                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1108                             "BS_%d : mgmt_open_connection Failed");
1109
1110                 if (ret != -EBUSY)
1111                         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1112                                             nonemb_cmd.va, nonemb_cmd.dma);
1113
1114                 beiscsi_free_ep(beiscsi_ep);
1115                 return ret;
1116         }
1117
1118         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1119         beiscsi_ep = ep->dd_data;
1120         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1121         beiscsi_ep->cid_vld = 1;
1122         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1123                     "BS_%d : mgmt_open_connection Success\n");
1124
1125         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1126                             nonemb_cmd.va, nonemb_cmd.dma);
1127         return 0;
1128 }
1129
1130 /**
1131  * beiscsi_ep_connect - Ask chip to create TCP Conn
1132  * @scsi_host: Pointer to scsi_host structure
1133  * @dst_addr: The IP address of Target
1134  * @non_blocking: blocking or non-blocking call
1135  *
1136  * This routines first asks chip to create a connection and then allocates an EP
1137  */
1138 struct iscsi_endpoint *
1139 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1140                    int non_blocking)
1141 {
1142         struct beiscsi_hba *phba;
1143         struct beiscsi_endpoint *beiscsi_ep;
1144         struct iscsi_endpoint *ep;
1145         int ret;
1146
1147         if (!shost) {
1148                 ret = -ENXIO;
1149                 pr_err("beiscsi_ep_connect shost is NULL\n");
1150                 return ERR_PTR(ret);
1151         }
1152
1153         phba = iscsi_host_priv(shost);
1154         if (!beiscsi_hba_is_online(phba)) {
1155                 ret = -EIO;
1156                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1157                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1158                 return ERR_PTR(ret);
1159         }
1160         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1161                 ret = -EBUSY;
1162                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1163                             "BS_%d : The Adapter Port state is Down!!!\n");
1164                 return ERR_PTR(ret);
1165         }
1166
1167         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1168         if (!ep) {
1169                 ret = -ENOMEM;
1170                 return ERR_PTR(ret);
1171         }
1172
1173         beiscsi_ep = ep->dd_data;
1174         beiscsi_ep->phba = phba;
1175         beiscsi_ep->openiscsi_ep = ep;
1176         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1177         if (ret) {
1178                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1179                             "BS_%d : Failed in beiscsi_open_conn\n");
1180                 goto free_ep;
1181         }
1182
1183         return ep;
1184
1185 free_ep:
1186         iscsi_destroy_endpoint(ep);
1187         return ERR_PTR(ret);
1188 }
1189
1190 /**
1191  * beiscsi_ep_poll - Poll to see if connection is established
1192  * @ep: endpoint to be used
1193  * @timeout_ms: timeout specified in millisecs
1194  *
1195  * Poll to see if TCP connection established
1196  */
1197 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1198 {
1199         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1200
1201         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1202                     "BS_%d : In  beiscsi_ep_poll\n");
1203
1204         if (beiscsi_ep->cid_vld == 1)
1205                 return 1;
1206         else
1207                 return 0;
1208 }
1209
1210 /**
1211  * beiscsi_flush_cq()- Flush the CQ created.
1212  * @phba: ptr device priv structure.
1213  *
1214  * Before the connection resource are freed flush
1215  * all the CQ enteries
1216  **/
1217 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1218 {
1219         uint16_t i;
1220         struct be_eq_obj *pbe_eq;
1221         struct hwi_controller *phwi_ctrlr;
1222         struct hwi_context_memory *phwi_context;
1223
1224         phwi_ctrlr = phba->phwi_ctrlr;
1225         phwi_context = phwi_ctrlr->phwi_ctxt;
1226
1227         for (i = 0; i < phba->num_cpus; i++) {
1228                 pbe_eq = &phwi_context->be_eq[i];
1229                 irq_poll_disable(&pbe_eq->iopoll);
1230                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1231                 irq_poll_enable(&pbe_eq->iopoll);
1232         }
1233 }
1234
1235 /**
1236  * beiscsi_conn_close - Invalidate and upload connection
1237  * @ep: The iscsi endpoint
1238  *
1239  * Returns 0 on success,  -1 on failure.
1240  */
1241 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1242 {
1243         struct beiscsi_hba *phba = beiscsi_ep->phba;
1244         unsigned int tag, attempts;
1245         int ret;
1246
1247         /**
1248          * Without successfully invalidating and uploading connection
1249          * driver can't reuse the CID so attempt more than once.
1250          */
1251         attempts = 0;
1252         while (attempts++ < 3) {
1253                 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1254                 if (tag) {
1255                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1256                         if (!ret)
1257                                 break;
1258                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1259                                     "BS_%d : invalidate conn failed cid %d\n",
1260                                     beiscsi_ep->ep_cid);
1261                 }
1262         }
1263
1264         /* wait for all completions to arrive, then process them */
1265         msleep(250);
1266         /* flush CQ entries */
1267         beiscsi_flush_cq(phba);
1268
1269         if (attempts > 3)
1270                 return -1;
1271
1272         attempts = 0;
1273         while (attempts++ < 3) {
1274                 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1275                 if (tag) {
1276                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1277                         if (!ret)
1278                                 break;
1279                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1280                                     "BS_%d : upload conn failed cid %d\n",
1281                                     beiscsi_ep->ep_cid);
1282                 }
1283         }
1284         if (attempts > 3)
1285                 return -1;
1286
1287         return 0;
1288 }
1289
1290 /**
1291  * beiscsi_ep_disconnect - Tears down the TCP connection
1292  * @ep: endpoint to be used
1293  *
1294  * Tears down the TCP connection
1295  */
1296 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1297 {
1298         struct beiscsi_endpoint *beiscsi_ep;
1299         struct beiscsi_conn *beiscsi_conn;
1300         struct beiscsi_hba *phba;
1301         uint16_t cri_index;
1302
1303         beiscsi_ep = ep->dd_data;
1304         phba = beiscsi_ep->phba;
1305         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1306                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1307                     beiscsi_ep->ep_cid);
1308
1309         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1310         if (!phba->ep_array[cri_index]) {
1311                 __beiscsi_log(phba, KERN_ERR,
1312                               "BS_%d : ep_array at %u cid %u empty\n",
1313                               cri_index,
1314                               beiscsi_ep->ep_cid);
1315                 return;
1316         }
1317
1318         if (beiscsi_ep->conn) {
1319                 beiscsi_conn = beiscsi_ep->conn;
1320                 iscsi_suspend_queue(beiscsi_conn->conn);
1321         }
1322
1323         if (!beiscsi_hba_is_online(phba)) {
1324                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1325                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1326         } else {
1327                 /**
1328                  * Make CID available even if close fails.
1329                  * If not freed, FW might fail open using the CID.
1330                  */
1331                 if (beiscsi_conn_close(beiscsi_ep) < 0)
1332                         __beiscsi_log(phba, KERN_ERR,
1333                                       "BS_%d : close conn failed cid %d\n",
1334                                       beiscsi_ep->ep_cid);
1335         }
1336
1337         beiscsi_free_ep(beiscsi_ep);
1338         if (!phba->conn_table[cri_index])
1339                 __beiscsi_log(phba, KERN_ERR,
1340                               "BS_%d : conn_table empty at %u: cid %u\n",
1341                               cri_index, beiscsi_ep->ep_cid);
1342         phba->conn_table[cri_index] = NULL;
1343         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1344 }
1345
1346 umode_t beiscsi_attr_is_visible(int param_type, int param)
1347 {
1348         switch (param_type) {
1349         case ISCSI_NET_PARAM:
1350                 switch (param) {
1351                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1352                 case ISCSI_NET_PARAM_IPV4_ADDR:
1353                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1354                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1355                 case ISCSI_NET_PARAM_IPV4_GW:
1356                 case ISCSI_NET_PARAM_IPV6_ADDR:
1357                 case ISCSI_NET_PARAM_VLAN_ID:
1358                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1359                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1360                         return S_IRUGO;
1361                 default:
1362                         return 0;
1363                 }
1364         case ISCSI_HOST_PARAM:
1365                 switch (param) {
1366                 case ISCSI_HOST_PARAM_HWADDRESS:
1367                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1368                 case ISCSI_HOST_PARAM_PORT_STATE:
1369                 case ISCSI_HOST_PARAM_PORT_SPEED:
1370                         return S_IRUGO;
1371                 default:
1372                         return 0;
1373                 }
1374         case ISCSI_PARAM:
1375                 switch (param) {
1376                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1377                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1378                 case ISCSI_PARAM_HDRDGST_EN:
1379                 case ISCSI_PARAM_DATADGST_EN:
1380                 case ISCSI_PARAM_CONN_ADDRESS:
1381                 case ISCSI_PARAM_CONN_PORT:
1382                 case ISCSI_PARAM_EXP_STATSN:
1383                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1384                 case ISCSI_PARAM_PERSISTENT_PORT:
1385                 case ISCSI_PARAM_PING_TMO:
1386                 case ISCSI_PARAM_RECV_TMO:
1387                 case ISCSI_PARAM_INITIAL_R2T_EN:
1388                 case ISCSI_PARAM_MAX_R2T:
1389                 case ISCSI_PARAM_IMM_DATA_EN:
1390                 case ISCSI_PARAM_FIRST_BURST:
1391                 case ISCSI_PARAM_MAX_BURST:
1392                 case ISCSI_PARAM_PDU_INORDER_EN:
1393                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1394                 case ISCSI_PARAM_ERL:
1395                 case ISCSI_PARAM_TARGET_NAME:
1396                 case ISCSI_PARAM_TPGT:
1397                 case ISCSI_PARAM_USERNAME:
1398                 case ISCSI_PARAM_PASSWORD:
1399                 case ISCSI_PARAM_USERNAME_IN:
1400                 case ISCSI_PARAM_PASSWORD_IN:
1401                 case ISCSI_PARAM_FAST_ABORT:
1402                 case ISCSI_PARAM_ABORT_TMO:
1403                 case ISCSI_PARAM_LU_RESET_TMO:
1404                 case ISCSI_PARAM_IFACE_NAME:
1405                 case ISCSI_PARAM_INITIATOR_NAME:
1406                         return S_IRUGO;
1407                 default:
1408                         return 0;
1409                 }
1410         }
1411
1412         return 0;
1413 }