drivers/scsi/be2iscsi/be_iscsi.c

   1 /**
   2  * Copyright (C) 2005 - 2009 ServerEngines
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation.  The full GNU General
   8  * Public License is included in this distribution in the file called COPYING.
   9  *
  10  * Written by: Jayamohan Kallickal (jayamohank@serverengines.com)
  11  *
  12  * Contact Information:
  13  * linux-drivers@serverengines.com
  14  *
  15  * ServerEngines
  16  * 209 N. Fair Oaks Ave
  17  * Sunnyvale, CA 94085
  18  *
  19  */
  20
  21 #include <scsi/libiscsi.h>
  22 #include <scsi/scsi_transport_iscsi.h>
  23 #include <scsi/scsi_transport.h>
  24 #include <scsi/scsi_cmnd.h>
  25 #include <scsi/scsi_device.h>
  26 #include <scsi/scsi_host.h>
  27 #include <scsi/scsi.h>
  28
  29 #include "be_iscsi.h"
  30
  31 extern struct iscsi_transport beiscsi_iscsi_transport;
  32
  33 /**
  34  * beiscsi_session_create - creates a new iscsi session
  35  * @cmds_max: max commands supported
  36  * @qdepth: max queue depth supported
  37  * @initial_cmdsn: initial iscsi CMDSN
  38  */
  39 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  40                                                  u16 cmds_max,
  41                                                  u16 qdepth,
  42                                                  u32 initial_cmdsn)
  43 {
  44         struct Scsi_Host *shost;
  45         struct beiscsi_endpoint *beiscsi_ep;
  46         struct iscsi_cls_session *cls_session;
  47         struct beiscsi_hba *phba;
  48         struct iscsi_session *sess;
  49         struct beiscsi_session *beiscsi_sess;
  50         struct beiscsi_io_task *io_task;
  51
  52         SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");
  53
  54         if (!ep) {
  55                 SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep \n");
  56                 return NULL;
  57         }
  58         beiscsi_ep = ep->dd_data;
  59         phba = beiscsi_ep->phba;
  60         shost = phba->shost;
  61         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  62                 shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
  63                              "Max cmds per session supported is %d. Using %d. "
  64                              "\n", cmds_max,
  65                               beiscsi_ep->phba->params.wrbs_per_cxn,
  66                               beiscsi_ep->phba->params.wrbs_per_cxn);
  67                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  68         }
  69
  70          cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  71                                            shost, cmds_max,
  72                                            sizeof(*beiscsi_sess),
  73                                            sizeof(*io_task),
  74                                            initial_cmdsn, ISCSI_MAX_TARGET);
  75         if (!cls_session)
  76                 return NULL;
  77         sess = cls_session->dd_data;
  78         beiscsi_sess = sess->dd_data;
  79         beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
  80                                                    phba->pcidev,
  81                                                    sizeof(struct be_cmd_bhs),
  82                                                    64, 0);
  83         if (!beiscsi_sess->bhs_pool)
  84                 goto destroy_sess;
  85
  86         return cls_session;
  87 destroy_sess:
  88         iscsi_session_teardown(cls_session);
  89         return NULL;
  90 }
  91
  92 /**
  93  * beiscsi_session_destroy - destroys iscsi session
  94  * @cls_session:        pointer to iscsi cls session
  95  *
  96  * Destroys iSCSI session instance and releases
  97  * resources allocated for it.
  98  */
  99 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 100 {
 101         struct iscsi_session *sess = cls_session->dd_data;
 102         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 103
 104         pci_pool_destroy(beiscsi_sess->bhs_pool);
 105         iscsi_session_teardown(cls_session);
 106 }
 107
 108 /**
 109  * beiscsi_conn_create - create an instance of iscsi connection
 110  * @cls_session: ptr to iscsi_cls_session
 111  * @cid: iscsi cid
 112  */
 113 struct iscsi_cls_conn *
 114 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 115 {
 116         struct beiscsi_hba *phba;
 117         struct Scsi_Host *shost;
 118         struct iscsi_cls_conn *cls_conn;
 119         struct beiscsi_conn *beiscsi_conn;
 120         struct iscsi_conn *conn;
 121         struct iscsi_session *sess;
 122         struct beiscsi_session *beiscsi_sess;
 123
 124         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
 125                  "from iscsi layer=%d\n", cid);
 126         shost = iscsi_session_to_shost(cls_session);
 127         phba = iscsi_host_priv(shost);
 128
 129         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 130         if (!cls_conn)
 131                 return NULL;
 132
 133         conn = cls_conn->dd_data;
 134         beiscsi_conn = conn->dd_data;
 135         beiscsi_conn->ep = NULL;
 136         beiscsi_conn->phba = phba;
 137         beiscsi_conn->conn = conn;
 138         sess = cls_session->dd_data;
 139         beiscsi_sess = sess->dd_data;
 140         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 141         return cls_conn;
 142 }
 143
 144 /**
 145  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 146  * @beiscsi_conn: The pointer to  beiscsi_conn structure
 147  * @phba: The phba instance
 148  * @cid: The cid to free
 149  */
 150 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 151                                 struct beiscsi_conn *beiscsi_conn,
 152                                 unsigned int cid)
 153 {
 154         if (phba->conn_table[cid]) {
 155                 SE_DEBUG(DBG_LVL_1,
 156                          "Connection table already occupied. Detected clash\n");
 157                 return -EINVAL;
 158         } else {
 159                 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n",
 160                          cid, beiscsi_conn);
 161                 phba->conn_table[cid] = beiscsi_conn;
 162         }
 163         return 0;
 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 =
 181                 (struct Scsi_Host *)iscsi_session_to_shost(cls_session);
 182         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 183         struct beiscsi_endpoint *beiscsi_ep;
 184         struct iscsi_endpoint *ep;
 185
 186         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
 187         ep = iscsi_lookup_endpoint(transport_fd);
 188         if (!ep)
 189                 return -EINVAL;
 190
 191         beiscsi_ep = ep->dd_data;
 192
 193         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 194                 return -EINVAL;
 195
 196         if (beiscsi_ep->phba != phba) {
 197                 SE_DEBUG(DBG_LVL_8,
 198                          "beiscsi_ep->hba=%p not equal to phba=%p \n",
 199                          beiscsi_ep->phba, phba);
 200                 return -EEXIST;
 201         }
 202
 203         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 204         beiscsi_conn->ep = beiscsi_ep;
 205         beiscsi_ep->conn = beiscsi_conn;
 206         SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n",
 207                  beiscsi_conn, conn, beiscsi_ep->ep_cid);
 208         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 209 }
 210
 211 /**
 212  * beiscsi_conn_get_param - get the iscsi parameter
 213  * @cls_conn: pointer to iscsi cls conn
 214  * @param: parameter type identifier
 215  * @buf: buffer pointer
 216  *
 217  * returns iscsi parameter
 218  */
 219 int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 220                            enum iscsi_param param, char *buf)
 221 {
 222         struct beiscsi_endpoint *beiscsi_ep;
 223         struct iscsi_conn *conn = cls_conn->dd_data;
 224         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 225         int len = 0;
 226
 227         beiscsi_ep = beiscsi_conn->ep;
 228         if (!beiscsi_ep) {
 229                 SE_DEBUG(DBG_LVL_1,
 230                          "In beiscsi_conn_get_param , no beiscsi_ep\n");
 231                 return -1;
 232         }
 233
 234         switch (param) {
 235         case ISCSI_PARAM_CONN_PORT:
 236                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 237                 break;
 238         case ISCSI_PARAM_CONN_ADDRESS:
 239                 if (beiscsi_ep->ip_type == BE2_IPV4)
 240                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 241                 else
 242                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 243                 break;
 244         default:
 245                 return iscsi_conn_get_param(cls_conn, param, buf);
 246         }
 247         return len;
 248 }
 249
 250 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 251                       enum iscsi_param param, char *buf, int buflen)
 252 {
 253         struct iscsi_conn *conn = cls_conn->dd_data;
 254         struct iscsi_session *session = conn->session;
 255         int ret;
 256
 257         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 258         if (ret)
 259                 return ret;
 260         /*
 261          * If userspace tried to set the value to higher than we can
 262          * support override here.
 263          */
 264         switch (param) {
 265         case ISCSI_PARAM_FIRST_BURST:
 266                 if (session->first_burst > 8192)
 267                         session->first_burst = 8192;
 268                 break;
 269         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 270                 if (conn->max_recv_dlength > 65536)
 271                         conn->max_recv_dlength = 65536;
 272                 break;
 273         case ISCSI_PARAM_MAX_BURST:
 274                 if (session->first_burst > 262144)
 275                         session->first_burst = 262144;
 276                 break;
 277         default:
 278                 return 0;
 279         }
 280
 281         return 0;
 282 }
 283
 284 /**
 285  * beiscsi_get_host_param - get the iscsi parameter
 286  * @shost: pointer to scsi_host structure
 287  * @param: parameter type identifier
 288  * @buf: buffer pointer
 289  *
 290  * returns host parameter
 291  */
 292 int beiscsi_get_host_param(struct Scsi_Host *shost,
 293                            enum iscsi_host_param param, char *buf)
 294 {
 295         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 296         int len = 0;
 297
 298         switch (param) {
 299         case ISCSI_HOST_PARAM_HWADDRESS:
 300                 be_cmd_get_mac_addr(&phba->ctrl, phba->mac_address);
 301                 len = sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 302                 break;
 303         default:
 304                 return iscsi_host_get_param(shost, param, buf);
 305         }
 306         return len;
 307 }
 308
 309 /**
 310  * beiscsi_conn_get_stats - get the iscsi stats
 311  * @cls_conn: pointer to iscsi cls conn
 312  * @stats: pointer to iscsi_stats structure
 313  *
 314  * returns iscsi stats
 315  */
 316 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 317                             struct iscsi_stats *stats)
 318 {
 319         struct iscsi_conn *conn = cls_conn->dd_data;
 320
 321         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 322         stats->txdata_octets = conn->txdata_octets;
 323         stats->rxdata_octets = conn->rxdata_octets;
 324         stats->dataout_pdus = conn->dataout_pdus_cnt;
 325         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 326         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 327         stats->datain_pdus = conn->datain_pdus_cnt;
 328         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 329         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 330         stats->r2t_pdus = conn->r2t_pdus_cnt;
 331         stats->digest_err = 0;
 332         stats->timeout_err = 0;
 333         stats->custom_length = 0;
 334         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 335         stats->custom[0].value = conn->eh_abort_cnt;
 336 }
 337
 338 /**
 339  * beiscsi_set_params_for_offld - get the parameters for offload
 340  * @beiscsi_conn: pointer to beiscsi_conn
 341  * @params: pointer to offload_params structure
 342  */
 343 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 344                                           struct beiscsi_offload_params *params)
 345 {
 346         struct iscsi_conn *conn = beiscsi_conn->conn;
 347         struct iscsi_session *session = conn->session;
 348
 349         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 350                       params, session->max_burst);
 351         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 352                       max_send_data_segment_length, params,
 353                       conn->max_xmit_dlength);
 354         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 355                       params, session->first_burst);
 356         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 357                       session->erl);
 358         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 359                       conn->datadgst_en);
 360         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 361                       conn->hdrdgst_en);
 362         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 363                       session->initial_r2t_en);
 364         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 365                       session->imm_data_en);
 366         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 367                       (conn->exp_statsn - 1));
 368 }
 369
 370 /**
 371  * beiscsi_conn_start - offload of session to chip
 372  * @cls_conn: pointer to beiscsi_conn
 373  */
 374 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 375 {
 376         struct iscsi_conn *conn = cls_conn->dd_data;
 377         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 378         struct beiscsi_endpoint *beiscsi_ep;
 379         struct beiscsi_offload_params params;
 380         struct iscsi_session *session = conn->session;
 381         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
 382         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 383
 384         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 385         beiscsi_ep = beiscsi_conn->ep;
 386         if (!beiscsi_ep)
 387                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 388
 389         free_mgmt_sgl_handle(phba, beiscsi_conn->plogin_sgl_handle);
 390         beiscsi_conn->login_in_progress = 0;
 391         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 392         beiscsi_offload_connection(beiscsi_conn, &params);
 393         iscsi_conn_start(cls_conn);
 394         return 0;
 395 }
 396
 397 /**
 398  * beiscsi_get_cid - Allocate a cid
 399  * @phba: The phba instance
 400  */
 401 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 402 {
 403         unsigned short cid = 0xFFFF;
 404
 405         if (!phba->avlbl_cids)
 406                 return cid;
 407
 408         cid = phba->cid_array[phba->cid_alloc++];
 409         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 410                 phba->cid_alloc = 0;
 411         phba->avlbl_cids--;
 412         return cid;
 413 }
 414
 415 /**
 416  * beiscsi_open_conn - Ask FW to open a TCP connection
 417  * @ep: endpoint to be used
 418  * @src_addr: The source IP address
 419  * @dst_addr: The Destination  IP address
 420  *
 421  * Asks the FW to open a TCP connection
 422  */
 423 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 424                              struct sockaddr *src_addr,
 425                              struct sockaddr *dst_addr, int non_blocking)
 426 {
 427         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 428         struct beiscsi_hba *phba = beiscsi_ep->phba;
 429         int ret = -1;
 430
 431         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 432         if (beiscsi_ep->ep_cid == 0xFFFF) {
 433                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 434                 return ret;
 435         }
 436         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ",
 437                  beiscsi_ep->ep_cid);
 438         phba->ep_array[beiscsi_ep->ep_cid] = ep;
 439         if (beiscsi_ep->ep_cid >
 440             (phba->fw_config.iscsi_cid_start + phba->params.cxns_per_ctrl)) {
 441                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 442                 return ret;
 443         }
 444
 445         beiscsi_ep->cid_vld = 0;
 446         return mgmt_open_connection(phba, dst_addr, beiscsi_ep);
 447 }
 448
 449 /**
 450  * beiscsi_put_cid - Free the cid
 451  * @phba: The phba for which the cid is being freed
 452  * @cid: The cid to free
 453  */
 454 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 455 {
 456         phba->avlbl_cids++;
 457         phba->cid_array[phba->cid_free++] = cid;
 458         if (phba->cid_free == phba->params.cxns_per_ctrl)
 459                 phba->cid_free = 0;
 460 }
 461
 462 /**
 463  * beiscsi_free_ep - free endpoint
 464  * @ep: pointer to iscsi endpoint structure
 465  */
 466 static void beiscsi_free_ep(struct iscsi_endpoint *ep)
 467 {
 468         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 469         struct beiscsi_hba *phba = beiscsi_ep->phba;
 470
 471         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 472         beiscsi_ep->phba = NULL;
 473         iscsi_destroy_endpoint(ep);
 474 }
 475
 476 /**
 477  * beiscsi_ep_connect - Ask chip to create TCP Conn
 478  * @scsi_host: Pointer to scsi_host structure
 479  * @dst_addr: The IP address of Target
 480  * @non_blocking: blocking or non-blocking call
 481  *
 482  * This routines first asks chip to create a connection and then allocates an EP
 483  */
 484 struct iscsi_endpoint *
 485 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 486                    int non_blocking)
 487 {
 488         struct beiscsi_hba *phba;
 489         struct beiscsi_endpoint *beiscsi_ep;
 490         struct iscsi_endpoint *ep;
 491         int ret;
 492
 493         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n");
 494         if (shost)
 495                 phba = iscsi_host_priv(shost);
 496         else {
 497                 ret = -ENXIO;
 498                 SE_DEBUG(DBG_LVL_1, "shost is NULL \n");
 499                 return ERR_PTR(ret);
 500         }
 501         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 502         if (!ep) {
 503                 ret = -ENOMEM;
 504                 return ERR_PTR(ret);
 505         }
 506
 507         beiscsi_ep = ep->dd_data;
 508         beiscsi_ep->phba = phba;
 509
 510         if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) {
 511                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 512                 ret = -ENOMEM;
 513                 goto free_ep;
 514         }
 515
 516         return ep;
 517
 518 free_ep:
 519         beiscsi_free_ep(ep);
 520         return ERR_PTR(ret);
 521 }
 522
 523 /**
 524  * beiscsi_ep_poll - Poll to see if connection is established
 525  * @ep: endpoint to be used
 526  * @timeout_ms: timeout specified in millisecs
 527  *
 528  * Poll to see if TCP connection established
 529  */
 530 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 531 {
 532         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 533
 534         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 535         if (beiscsi_ep->cid_vld == 1)
 536                 return 1;
 537         else
 538                 return 0;
 539 }
 540
 541 /**
 542  * beiscsi_close_conn - Upload the  connection
 543  * @ep: The iscsi endpoint
 544  * @flag: The type of connection closure
 545  */
 546 static int beiscsi_close_conn(struct iscsi_endpoint *ep, int flag)
 547 {
 548         int ret = 0;
 549         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 550         struct beiscsi_hba *phba = beiscsi_ep->phba;
 551
 552         if (MGMT_STATUS_SUCCESS !=
 553             mgmt_upload_connection(phba, beiscsi_ep->ep_cid,
 554                 CONNECTION_UPLOAD_GRACEFUL)) {
 555                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x",
 556                          beiscsi_ep->ep_cid);
 557                 ret = -1;
 558         }
 559
 560         return ret;
 561 }
 562
 563 /**
 564  * beiscsi_ep_disconnect - Tears down the TCP connection
 565  * @ep: endpoint to be used
 566  *
 567  * Tears down the TCP connection
 568  */
 569 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 570 {
 571         struct beiscsi_conn *beiscsi_conn;
 572         struct beiscsi_endpoint *beiscsi_ep;
 573         struct beiscsi_hba *phba;
 574         int flag = 0;
 575
 576         beiscsi_ep = ep->dd_data;
 577         phba = beiscsi_ep->phba;
 578         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect\n");
 579
 580         if (beiscsi_ep->conn) {
 581                 beiscsi_conn = beiscsi_ep->conn;
 582                 iscsi_suspend_queue(beiscsi_conn->conn);
 583                 beiscsi_close_conn(ep, flag);
 584         }
 585
 586         beiscsi_free_ep(ep);
 587 }
 588
 589 /**
 590  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 591  * @phba: The phba instance
 592  * @cid: The cid to free
 593  */
 594 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 595                                       unsigned int cid)
 596 {
 597         if (phba->conn_table[cid])
 598                 phba->conn_table[cid] = NULL;
 599         else {
 600                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n");
 601                 return -EINVAL;
 602         }
 603         return 0;
 604 }
 605
 606 /**
 607  * beiscsi_conn_stop - Invalidate and stop the connection
 608  * @cls_conn: pointer to get iscsi_conn
 609  * @flag: The type of connection closure
 610  */
 611 void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
 612 {
 613         struct iscsi_conn *conn = cls_conn->dd_data;
 614         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 615         struct beiscsi_endpoint *beiscsi_ep;
 616         struct iscsi_session *session = conn->session;
 617         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
 618         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 619         unsigned int status;
 620         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 621
 622         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop\n");
 623         beiscsi_ep = beiscsi_conn->ep;
 624         if (!beiscsi_ep) {
 625                 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n");
 626                 return;
 627         }
 628         status = mgmt_invalidate_connection(phba, beiscsi_ep,
 629                                             beiscsi_ep->ep_cid, 1,
 630                                             savecfg_flag);
 631         if (status != MGMT_STATUS_SUCCESS) {
 632                 SE_DEBUG(DBG_LVL_1,
 633                          "mgmt_invalidate_connection Failed for cid=%d \n",
 634                          beiscsi_ep->ep_cid);
 635         }
 636         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 637         iscsi_conn_stop(cls_conn, flag);
 638 }