drivers/scsi/be2iscsi/be_iscsi.c

   1 /**
   2  * Copyright (C) 2005 - 2010 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         SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
 105         pci_pool_destroy(beiscsi_sess->bhs_pool);
 106         iscsi_session_teardown(cls_session);
 107 }
 108
 109 /**
 110  * beiscsi_conn_create - create an instance of iscsi connection
 111  * @cls_session: ptr to iscsi_cls_session
 112  * @cid: iscsi cid
 113  */
 114 struct iscsi_cls_conn *
 115 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 116 {
 117         struct beiscsi_hba *phba;
 118         struct Scsi_Host *shost;
 119         struct iscsi_cls_conn *cls_conn;
 120         struct beiscsi_conn *beiscsi_conn;
 121         struct iscsi_conn *conn;
 122         struct iscsi_session *sess;
 123         struct beiscsi_session *beiscsi_sess;
 124
 125         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
 126                  "from iscsi layer=%d\n", cid);
 127         shost = iscsi_session_to_shost(cls_session);
 128         phba = iscsi_host_priv(shost);
 129
 130         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 131         if (!cls_conn)
 132                 return NULL;
 133
 134         conn = cls_conn->dd_data;
 135         beiscsi_conn = conn->dd_data;
 136         beiscsi_conn->ep = NULL;
 137         beiscsi_conn->phba = phba;
 138         beiscsi_conn->conn = conn;
 139         sess = cls_session->dd_data;
 140         beiscsi_sess = sess->dd_data;
 141         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 142         return cls_conn;
 143 }
 144
 145 /**
 146  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 147  * @beiscsi_conn: The pointer to  beiscsi_conn structure
 148  * @phba: The phba instance
 149  * @cid: The cid to free
 150  */
 151 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 152                                 struct beiscsi_conn *beiscsi_conn,
 153                                 unsigned int cid)
 154 {
 155         if (phba->conn_table[cid]) {
 156                 SE_DEBUG(DBG_LVL_1,
 157                          "Connection table already occupied. Detected clash\n");
 158                 return -EINVAL;
 159         } else {
 160                 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn) \n",
 161                          cid, beiscsi_conn);
 162                 phba->conn_table[cid] = beiscsi_conn;
 163         }
 164         return 0;
 165 }
 166
 167 /**
 168  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 169  * @cls_session: pointer to iscsi cls session
 170  * @cls_conn: pointer to iscsi cls conn
 171  * @transport_fd: EP handle(64 bit)
 172  *
 173  * This function binds the TCP Conn with iSCSI Connection and Session.
 174  */
 175 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 176                       struct iscsi_cls_conn *cls_conn,
 177                       u64 transport_fd, int is_leading)
 178 {
 179         struct iscsi_conn *conn = cls_conn->dd_data;
 180         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 181         struct Scsi_Host *shost =
 182                 (struct Scsi_Host *)iscsi_session_to_shost(cls_session);
 183         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 184         struct beiscsi_endpoint *beiscsi_ep;
 185         struct iscsi_endpoint *ep;
 186
 187         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
 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                 SE_DEBUG(DBG_LVL_8,
 199                          "beiscsi_ep->hba=%p not equal to phba=%p \n",
 200                          beiscsi_ep->phba, phba);
 201                 return -EEXIST;
 202         }
 203
 204         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 205         beiscsi_conn->ep = beiscsi_ep;
 206         beiscsi_ep->conn = beiscsi_conn;
 207         SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d \n",
 208                  beiscsi_conn, conn, beiscsi_ep->ep_cid);
 209         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 210 }
 211
 212 /**
 213  * beiscsi_conn_get_param - get the iscsi parameter
 214  * @cls_conn: pointer to iscsi cls conn
 215  * @param: parameter type identifier
 216  * @buf: buffer pointer
 217  *
 218  * returns iscsi parameter
 219  */
 220 int beiscsi_conn_get_param(struct iscsi_cls_conn *cls_conn,
 221                            enum iscsi_param param, char *buf)
 222 {
 223         struct beiscsi_endpoint *beiscsi_ep;
 224         struct iscsi_conn *conn = cls_conn->dd_data;
 225         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 226         int len = 0;
 227
 228         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
 229         beiscsi_ep = beiscsi_conn->ep;
 230         if (!beiscsi_ep) {
 231                 SE_DEBUG(DBG_LVL_1,
 232                          "In beiscsi_conn_get_param , no beiscsi_ep\n");
 233                 return -1;
 234         }
 235
 236         switch (param) {
 237         case ISCSI_PARAM_CONN_PORT:
 238                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 239                 break;
 240         case ISCSI_PARAM_CONN_ADDRESS:
 241                 if (beiscsi_ep->ip_type == BE2_IPV4)
 242                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 243                 else
 244                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 245                 break;
 246         default:
 247                 return iscsi_conn_get_param(cls_conn, param, buf);
 248         }
 249         return len;
 250 }
 251
 252 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 253                       enum iscsi_param param, char *buf, int buflen)
 254 {
 255         struct iscsi_conn *conn = cls_conn->dd_data;
 256         struct iscsi_session *session = conn->session;
 257         int ret;
 258
 259         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
 260         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 261         if (ret)
 262                 return ret;
 263         /*
 264          * If userspace tried to set the value to higher than we can
 265          * support override here.
 266          */
 267         switch (param) {
 268         case ISCSI_PARAM_FIRST_BURST:
 269                 if (session->first_burst > 8192)
 270                         session->first_burst = 8192;
 271                 break;
 272         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 273                 if (conn->max_recv_dlength > 65536)
 274                         conn->max_recv_dlength = 65536;
 275                 break;
 276         case ISCSI_PARAM_MAX_BURST:
 277                 if (session->max_burst > 262144)
 278                         session->max_burst = 262144;
 279                 break;
 280         default:
 281                 return 0;
 282         }
 283
 284         return 0;
 285 }
 286
 287 /**
 288  * beiscsi_get_host_param - get the iscsi parameter
 289  * @shost: pointer to scsi_host structure
 290  * @param: parameter type identifier
 291  * @buf: buffer pointer
 292  *
 293  * returns host parameter
 294  */
 295 int beiscsi_get_host_param(struct Scsi_Host *shost,
 296                            enum iscsi_host_param param, char *buf)
 297 {
 298         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 299         struct be_cmd_resp_get_mac_addr *resp;
 300         struct be_mcc_wrb *wrb;
 301         unsigned int tag, wrb_num;
 302         int len = 0;
 303         unsigned short status, extd_status;
 304         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 305
 306         SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 307         switch (param) {
 308         case ISCSI_HOST_PARAM_HWADDRESS:
 309                 tag = be_cmd_get_mac_addr(phba);
 310                 if (!tag) {
 311                         SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed \n");
 312                         return -1;
 313                 } else
 314                         wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 315                                                  phba->ctrl.mcc_numtag[tag]);
 316
 317                 wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 318                 extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 319                 status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 320                 if (status || extd_status) {
 321                         SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed"
 322                                             " status = %d extd_status = %d \n",
 323                                             status, extd_status);
 324                         free_mcc_tag(&phba->ctrl, tag);
 325                         return -1;
 326                 } else {
 327                         wrb = queue_get_wrb(mccq, wrb_num);
 328                         free_mcc_tag(&phba->ctrl, tag);
 329                         resp = embedded_payload(wrb);
 330                         memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 331                         len = sysfs_format_mac(buf, phba->mac_address,
 332                                                ETH_ALEN);
 333                 }
 334                 break;
 335         default:
 336                 return iscsi_host_get_param(shost, param, buf);
 337         }
 338         return len;
 339 }
 340
 341 /**
 342  * beiscsi_conn_get_stats - get the iscsi stats
 343  * @cls_conn: pointer to iscsi cls conn
 344  * @stats: pointer to iscsi_stats structure
 345  *
 346  * returns iscsi stats
 347  */
 348 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 349                             struct iscsi_stats *stats)
 350 {
 351         struct iscsi_conn *conn = cls_conn->dd_data;
 352
 353         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 354         stats->txdata_octets = conn->txdata_octets;
 355         stats->rxdata_octets = conn->rxdata_octets;
 356         stats->dataout_pdus = conn->dataout_pdus_cnt;
 357         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 358         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 359         stats->datain_pdus = conn->datain_pdus_cnt;
 360         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 361         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 362         stats->r2t_pdus = conn->r2t_pdus_cnt;
 363         stats->digest_err = 0;
 364         stats->timeout_err = 0;
 365         stats->custom_length = 0;
 366         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 367         stats->custom[0].value = conn->eh_abort_cnt;
 368 }
 369
 370 /**
 371  * beiscsi_set_params_for_offld - get the parameters for offload
 372  * @beiscsi_conn: pointer to beiscsi_conn
 373  * @params: pointer to offload_params structure
 374  */
 375 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 376                                           struct beiscsi_offload_params *params)
 377 {
 378         struct iscsi_conn *conn = beiscsi_conn->conn;
 379         struct iscsi_session *session = conn->session;
 380
 381         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 382                       params, session->max_burst);
 383         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 384                       max_send_data_segment_length, params,
 385                       conn->max_xmit_dlength);
 386         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 387                       params, session->first_burst);
 388         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 389                       session->erl);
 390         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 391                       conn->datadgst_en);
 392         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 393                       conn->hdrdgst_en);
 394         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 395                       session->initial_r2t_en);
 396         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 397                       session->imm_data_en);
 398         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 399                       (conn->exp_statsn - 1));
 400 }
 401
 402 /**
 403  * beiscsi_conn_start - offload of session to chip
 404  * @cls_conn: pointer to beiscsi_conn
 405  */
 406 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 407 {
 408         struct iscsi_conn *conn = cls_conn->dd_data;
 409         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 410         struct beiscsi_endpoint *beiscsi_ep;
 411         struct beiscsi_offload_params params;
 412
 413         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 414         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 415         beiscsi_ep = beiscsi_conn->ep;
 416         if (!beiscsi_ep)
 417                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 418
 419         beiscsi_conn->login_in_progress = 0;
 420         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 421         beiscsi_offload_connection(beiscsi_conn, &params);
 422         iscsi_conn_start(cls_conn);
 423         return 0;
 424 }
 425
 426 /**
 427  * beiscsi_get_cid - Allocate a cid
 428  * @phba: The phba instance
 429  */
 430 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 431 {
 432         unsigned short cid = 0xFFFF;
 433
 434         if (!phba->avlbl_cids)
 435                 return cid;
 436
 437         cid = phba->cid_array[phba->cid_alloc++];
 438         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 439                 phba->cid_alloc = 0;
 440         phba->avlbl_cids--;
 441         return cid;
 442 }
 443
 444 /**
 445  * beiscsi_open_conn - Ask FW to open a TCP connection
 446  * @ep: endpoint to be used
 447  * @src_addr: The source IP address
 448  * @dst_addr: The Destination  IP address
 449  *
 450  * Asks the FW to open a TCP connection
 451  */
 452 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 453                              struct sockaddr *src_addr,
 454                              struct sockaddr *dst_addr, int non_blocking)
 455 {
 456         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 457         struct beiscsi_hba *phba = beiscsi_ep->phba;
 458         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 459         struct be_mcc_wrb *wrb;
 460         struct tcp_connect_and_offload_out *ptcpcnct_out;
 461         unsigned short status, extd_status;
 462         unsigned int tag, wrb_num;
 463         int ret = -1;
 464
 465         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 466         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 467         if (beiscsi_ep->ep_cid == 0xFFFF) {
 468                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 469                 return ret;
 470         }
 471         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d ",
 472                  beiscsi_ep->ep_cid);
 473         phba->ep_array[beiscsi_ep->ep_cid -
 474                        phba->fw_config.iscsi_cid_start] = ep;
 475         if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 476                                   phba->params.cxns_per_ctrl * 2)) {
 477                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 478                 return ret;
 479         }
 480
 481         beiscsi_ep->cid_vld = 0;
 482         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep);
 483         if (!tag) {
 484                 SE_DEBUG(DBG_LVL_1,
 485                          "mgmt_open_connection Failed for cid=%d \n",
 486                          beiscsi_ep->ep_cid);
 487         } else {
 488                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 489                                          phba->ctrl.mcc_numtag[tag]);
 490         }
 491         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 492         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 493         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 494         if (status || extd_status) {
 495                 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 496                                     " status = %d extd_status = %d \n",
 497                                     status, extd_status);
 498                 free_mcc_tag(&phba->ctrl, tag);
 499                 return -1;
 500         } else {
 501                 wrb = queue_get_wrb(mccq, wrb_num);
 502                 free_mcc_tag(&phba->ctrl, tag);
 503
 504                 ptcpcnct_out =  embedded_payload(wrb);
 505                 beiscsi_ep = ep->dd_data;
 506                 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 507                 beiscsi_ep->cid_vld = 1;
 508                 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 509         }
 510         return 0;
 511 }
 512
 513 /**
 514  * beiscsi_put_cid - Free the cid
 515  * @phba: The phba for which the cid is being freed
 516  * @cid: The cid to free
 517  */
 518 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 519 {
 520         phba->avlbl_cids++;
 521         phba->cid_array[phba->cid_free++] = cid;
 522         if (phba->cid_free == phba->params.cxns_per_ctrl)
 523                 phba->cid_free = 0;
 524 }
 525
 526 /**
 527  * beiscsi_free_ep - free endpoint
 528  * @ep: pointer to iscsi endpoint structure
 529  */
 530 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 531 {
 532         struct beiscsi_hba *phba = beiscsi_ep->phba;
 533
 534         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 535         beiscsi_ep->phba = NULL;
 536 }
 537
 538 /**
 539  * beiscsi_ep_connect - Ask chip to create TCP Conn
 540  * @scsi_host: Pointer to scsi_host structure
 541  * @dst_addr: The IP address of Target
 542  * @non_blocking: blocking or non-blocking call
 543  *
 544  * This routines first asks chip to create a connection and then allocates an EP
 545  */
 546 struct iscsi_endpoint *
 547 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 548                    int non_blocking)
 549 {
 550         struct beiscsi_hba *phba;
 551         struct beiscsi_endpoint *beiscsi_ep;
 552         struct iscsi_endpoint *ep;
 553         int ret;
 554
 555         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect \n");
 556         if (shost)
 557                 phba = iscsi_host_priv(shost);
 558         else {
 559                 ret = -ENXIO;
 560                 SE_DEBUG(DBG_LVL_1, "shost is NULL \n");
 561                 return ERR_PTR(ret);
 562         }
 563
 564         if (phba->state != BE_ADAPTER_UP) {
 565                 ret = -EBUSY;
 566                 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP \n");
 567                 return ERR_PTR(ret);
 568         }
 569
 570         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 571         if (!ep) {
 572                 ret = -ENOMEM;
 573                 return ERR_PTR(ret);
 574         }
 575
 576         beiscsi_ep = ep->dd_data;
 577         beiscsi_ep->phba = phba;
 578         beiscsi_ep->openiscsi_ep = ep;
 579         if (beiscsi_open_conn(ep, NULL, dst_addr, non_blocking)) {
 580                 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn \n");
 581                 ret = -ENOMEM;
 582                 goto free_ep;
 583         }
 584
 585         return ep;
 586
 587 free_ep:
 588         beiscsi_free_ep(beiscsi_ep);
 589         return ERR_PTR(ret);
 590 }
 591
 592 /**
 593  * beiscsi_ep_poll - Poll to see if connection is established
 594  * @ep: endpoint to be used
 595  * @timeout_ms: timeout specified in millisecs
 596  *
 597  * Poll to see if TCP connection established
 598  */
 599 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 600 {
 601         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 602
 603         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 604         if (beiscsi_ep->cid_vld == 1)
 605                 return 1;
 606         else
 607                 return 0;
 608 }
 609
 610 /**
 611  * beiscsi_close_conn - Upload the  connection
 612  * @ep: The iscsi endpoint
 613  * @flag: The type of connection closure
 614  */
 615 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 616 {
 617         int ret = 0;
 618         unsigned int tag;
 619         struct beiscsi_hba *phba = beiscsi_ep->phba;
 620
 621         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 622         if (!tag) {
 623                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x",
 624                          beiscsi_ep->ep_cid);
 625                 ret = -1;
 626         } else {
 627                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 628                                          phba->ctrl.mcc_numtag[tag]);
 629                 free_mcc_tag(&phba->ctrl, tag);
 630         }
 631         return ret;
 632 }
 633
 634 /**
 635  * beiscsi_ep_disconnect - Tears down the TCP connection
 636  * @ep: endpoint to be used
 637  *
 638  * Tears down the TCP connection
 639  */
 640 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 641 {
 642         struct beiscsi_conn *beiscsi_conn;
 643         struct beiscsi_endpoint *beiscsi_ep;
 644         struct beiscsi_hba *phba;
 645
 646         beiscsi_ep = ep->dd_data;
 647         phba = beiscsi_ep->phba;
 648         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 649                              beiscsi_ep->ep_cid);
 650
 651         if (beiscsi_ep->conn) {
 652                 beiscsi_conn = beiscsi_ep->conn;
 653                 iscsi_suspend_queue(beiscsi_conn->conn);
 654         }
 655
 656 }
 657
 658 /**
 659  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 660  * @phba: The phba instance
 661  * @cid: The cid to free
 662  */
 663 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 664                                       unsigned int cid)
 665 {
 666         if (phba->conn_table[cid])
 667                 phba->conn_table[cid] = NULL;
 668         else {
 669                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied. \n");
 670                 return -EINVAL;
 671         }
 672         return 0;
 673 }
 674
 675 /**
 676  * beiscsi_conn_stop - Invalidate and stop the connection
 677  * @cls_conn: pointer to get iscsi_conn
 678  * @flag: The type of connection closure
 679  */
 680 void beiscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
 681 {
 682         struct iscsi_conn *conn = cls_conn->dd_data;
 683         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 684         struct beiscsi_endpoint *beiscsi_ep;
 685         struct iscsi_session *session = conn->session;
 686         struct Scsi_Host *shost = iscsi_session_to_shost(session->cls_session);
 687         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 688         unsigned int tag;
 689         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 690
 691         beiscsi_ep = beiscsi_conn->ep;
 692         if (!beiscsi_ep) {
 693                 SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop , no beiscsi_ep\n");
 694                 return;
 695         }
 696         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_stop  ep_cid = %d\n",
 697                              beiscsi_ep->ep_cid);
 698         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 699                                             beiscsi_ep->ep_cid, 1,
 700                                             savecfg_flag);
 701         if (!tag) {
 702                 SE_DEBUG(DBG_LVL_1,
 703                          "mgmt_invalidate_connection Failed for cid=%d \n",
 704                           beiscsi_ep->ep_cid);
 705         } else {
 706                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 707                                          phba->ctrl.mcc_numtag[tag]);
 708                 free_mcc_tag(&phba->ctrl, tag);
 709         }
 710         beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 711         beiscsi_free_ep(beiscsi_ep);
 712         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 713         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 714         iscsi_conn_stop(cls_conn, flag);
 715 }