release/src-rt-6.x.4708/linux/linux-2.6.36/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 -ENODEV;
 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         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 281                 if ((conn->max_xmit_dlength > 65536) ||
 282                     (conn->max_xmit_dlength == 0))
 283                         conn->max_xmit_dlength = 65536;
 284         default:
 285                 return 0;
 286         }
 287
 288         return 0;
 289 }
 290
 291 /**
 292  * beiscsi_get_host_param - get the iscsi parameter
 293  * @shost: pointer to scsi_host structure
 294  * @param: parameter type identifier
 295  * @buf: buffer pointer
 296  *
 297  * returns host parameter
 298  */
 299 int beiscsi_get_host_param(struct Scsi_Host *shost,
 300                            enum iscsi_host_param param, char *buf)
 301 {
 302         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 303         int status = 0;
 304
 305         SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 306         switch (param) {
 307         case ISCSI_HOST_PARAM_HWADDRESS:
 308                 status = beiscsi_get_macaddr(buf, phba);
 309                 if (status < 0) {
 310                         SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
 311                         return status;
 312                 }
 313                 break;
 314         default:
 315                 return iscsi_host_get_param(shost, param, buf);
 316         }
 317         return status;
 318 }
 319
 320 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 321 {
 322         struct be_cmd_resp_get_mac_addr *resp;
 323         struct be_mcc_wrb *wrb;
 324         unsigned int tag, wrb_num;
 325         unsigned short status, extd_status;
 326         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 327         int rc;
 328
 329         if (phba->read_mac_address)
 330                 return sysfs_format_mac(buf, phba->mac_address,
 331                                         ETH_ALEN);
 332
 333         tag = be_cmd_get_mac_addr(phba);
 334         if (!tag) {
 335                 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
 336                 return -EBUSY;
 337         } else
 338                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 339                                          phba->ctrl.mcc_numtag[tag]);
 340
 341         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 342         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 343         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 344         if (status || extd_status) {
 345                 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
 346                                     " status = %d extd_status = %d\n",
 347                                     status, extd_status);
 348                 free_mcc_tag(&phba->ctrl, tag);
 349                 return -EAGAIN;
 350         }
 351         wrb = queue_get_wrb(mccq, wrb_num);
 352         free_mcc_tag(&phba->ctrl, tag);
 353         resp = embedded_payload(wrb);
 354         memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 355         rc = sysfs_format_mac(buf, phba->mac_address,
 356                                ETH_ALEN);
 357         phba->read_mac_address = 1;
 358         return rc;
 359 }
 360
 361
 362 /**
 363  * beiscsi_conn_get_stats - get the iscsi stats
 364  * @cls_conn: pointer to iscsi cls conn
 365  * @stats: pointer to iscsi_stats structure
 366  *
 367  * returns iscsi stats
 368  */
 369 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 370                             struct iscsi_stats *stats)
 371 {
 372         struct iscsi_conn *conn = cls_conn->dd_data;
 373
 374         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 375         stats->txdata_octets = conn->txdata_octets;
 376         stats->rxdata_octets = conn->rxdata_octets;
 377         stats->dataout_pdus = conn->dataout_pdus_cnt;
 378         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 379         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 380         stats->datain_pdus = conn->datain_pdus_cnt;
 381         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 382         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 383         stats->r2t_pdus = conn->r2t_pdus_cnt;
 384         stats->digest_err = 0;
 385         stats->timeout_err = 0;
 386         stats->custom_length = 0;
 387         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 388         stats->custom[0].value = conn->eh_abort_cnt;
 389 }
 390
 391 /**
 392  * beiscsi_set_params_for_offld - get the parameters for offload
 393  * @beiscsi_conn: pointer to beiscsi_conn
 394  * @params: pointer to offload_params structure
 395  */
 396 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 397                                           struct beiscsi_offload_params *params)
 398 {
 399         struct iscsi_conn *conn = beiscsi_conn->conn;
 400         struct iscsi_session *session = conn->session;
 401
 402         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 403                       params, session->max_burst);
 404         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 405                       max_send_data_segment_length, params,
 406                       conn->max_xmit_dlength);
 407         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 408                       params, session->first_burst);
 409         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 410                       session->erl);
 411         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 412                       conn->datadgst_en);
 413         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 414                       conn->hdrdgst_en);
 415         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 416                       session->initial_r2t_en);
 417         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 418                       session->imm_data_en);
 419         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 420                       (conn->exp_statsn - 1));
 421 }
 422
 423 /**
 424  * beiscsi_conn_start - offload of session to chip
 425  * @cls_conn: pointer to beiscsi_conn
 426  */
 427 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 428 {
 429         struct iscsi_conn *conn = cls_conn->dd_data;
 430         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 431         struct beiscsi_endpoint *beiscsi_ep;
 432         struct beiscsi_offload_params params;
 433
 434         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 435         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 436         beiscsi_ep = beiscsi_conn->ep;
 437         if (!beiscsi_ep)
 438                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 439
 440         beiscsi_conn->login_in_progress = 0;
 441         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 442         beiscsi_offload_connection(beiscsi_conn, &params);
 443         iscsi_conn_start(cls_conn);
 444         return 0;
 445 }
 446
 447 /**
 448  * beiscsi_get_cid - Allocate a cid
 449  * @phba: The phba instance
 450  */
 451 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 452 {
 453         unsigned short cid = 0xFFFF;
 454
 455         if (!phba->avlbl_cids)
 456                 return cid;
 457
 458         cid = phba->cid_array[phba->cid_alloc++];
 459         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 460                 phba->cid_alloc = 0;
 461         phba->avlbl_cids--;
 462         return cid;
 463 }
 464
 465 /**
 466  * beiscsi_put_cid - Free the cid
 467  * @phba: The phba for which the cid is being freed
 468  * @cid: The cid to free
 469  */
 470 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 471 {
 472         phba->avlbl_cids++;
 473         phba->cid_array[phba->cid_free++] = cid;
 474         if (phba->cid_free == phba->params.cxns_per_ctrl)
 475                 phba->cid_free = 0;
 476 }
 477
 478 /**
 479  * beiscsi_free_ep - free endpoint
 480  * @ep: pointer to iscsi endpoint structure
 481  */
 482 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 483 {
 484         struct beiscsi_hba *phba = beiscsi_ep->phba;
 485
 486         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 487         beiscsi_ep->phba = NULL;
 488 }
 489
 490 /**
 491  * beiscsi_open_conn - Ask FW to open a TCP connection
 492  * @ep: endpoint to be used
 493  * @src_addr: The source IP address
 494  * @dst_addr: The Destination  IP address
 495  *
 496  * Asks the FW to open a TCP connection
 497  */
 498 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 499                              struct sockaddr *src_addr,
 500                              struct sockaddr *dst_addr, int non_blocking)
 501 {
 502         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 503         struct beiscsi_hba *phba = beiscsi_ep->phba;
 504         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 505         struct be_mcc_wrb *wrb;
 506         struct tcp_connect_and_offload_out *ptcpcnct_out;
 507         unsigned short status, extd_status;
 508         struct be_dma_mem nonemb_cmd;
 509         unsigned int tag, wrb_num;
 510         int ret = -ENOMEM;
 511
 512         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 513         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 514         if (beiscsi_ep->ep_cid == 0xFFFF) {
 515                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 516                 return ret;
 517         }
 518         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
 519                  beiscsi_ep->ep_cid);
 520         phba->ep_array[beiscsi_ep->ep_cid -
 521                        phba->fw_config.iscsi_cid_start] = ep;
 522         if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 523                                   phba->params.cxns_per_ctrl * 2)) {
 524                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 525                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 526                 goto free_ep;
 527         }
 528
 529         beiscsi_ep->cid_vld = 0;
 530         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
 531                                 sizeof(struct tcp_connect_and_offload_in),
 532                                 &nonemb_cmd.dma);
 533         if (nonemb_cmd.va == NULL) {
 534                 SE_DEBUG(DBG_LVL_1,
 535                          "Failed to allocate memory for mgmt_open_connection"
 536                          "\n");
 537                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 538                 return -ENOMEM;
 539         }
 540         nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
 541         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
 542         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
 543         if (!tag) {
 544                 SE_DEBUG(DBG_LVL_1,
 545                          "mgmt_open_connection Failed for cid=%d\n",
 546                          beiscsi_ep->ep_cid);
 547                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 548                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 549                                     nonemb_cmd.va, nonemb_cmd.dma);
 550                 return -EAGAIN;
 551         } else {
 552                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 553                                          phba->ctrl.mcc_numtag[tag]);
 554         }
 555         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 556         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 557         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 558         if (status || extd_status) {
 559                 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 560                                     " status = %d extd_status = %d\n",
 561                                     status, extd_status);
 562                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 563                 free_mcc_tag(&phba->ctrl, tag);
 564                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 565                             nonemb_cmd.va, nonemb_cmd.dma);
 566                 goto free_ep;
 567         } else {
 568                 wrb = queue_get_wrb(mccq, wrb_num);
 569                 free_mcc_tag(&phba->ctrl, tag);
 570
 571                 ptcpcnct_out = embedded_payload(wrb);
 572                 beiscsi_ep = ep->dd_data;
 573                 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 574                 beiscsi_ep->cid_vld = 1;
 575                 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 576         }
 577         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 578         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 579                             nonemb_cmd.va, nonemb_cmd.dma);
 580         return 0;
 581
 582 free_ep:
 583         beiscsi_free_ep(beiscsi_ep);
 584         return -EBUSY;
 585 }
 586
 587 /**
 588  * beiscsi_ep_connect - Ask chip to create TCP Conn
 589  * @scsi_host: Pointer to scsi_host structure
 590  * @dst_addr: The IP address of Target
 591  * @non_blocking: blocking or non-blocking call
 592  *
 593  * This routines first asks chip to create a connection and then allocates an EP
 594  */
 595 struct iscsi_endpoint *
 596 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 597                    int non_blocking)
 598 {
 599         struct beiscsi_hba *phba;
 600         struct beiscsi_endpoint *beiscsi_ep;
 601         struct iscsi_endpoint *ep;
 602         int ret;
 603
 604         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
 605         if (shost)
 606                 phba = iscsi_host_priv(shost);
 607         else {
 608                 ret = -ENXIO;
 609                 SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
 610                 return ERR_PTR(ret);
 611         }
 612
 613         if (phba->state != BE_ADAPTER_UP) {
 614                 ret = -EBUSY;
 615                 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
 616                 return ERR_PTR(ret);
 617         }
 618
 619         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 620         if (!ep) {
 621                 ret = -ENOMEM;
 622                 return ERR_PTR(ret);
 623         }
 624
 625         beiscsi_ep = ep->dd_data;
 626         beiscsi_ep->phba = phba;
 627         beiscsi_ep->openiscsi_ep = ep;
 628         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
 629         if (ret) {
 630                 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
 631                 goto free_ep;
 632         }
 633
 634         return ep;
 635
 636 free_ep:
 637         iscsi_destroy_endpoint(ep);
 638         return ERR_PTR(ret);
 639 }
 640
 641 /**
 642  * beiscsi_ep_poll - Poll to see if connection is established
 643  * @ep: endpoint to be used
 644  * @timeout_ms: timeout specified in millisecs
 645  *
 646  * Poll to see if TCP connection established
 647  */
 648 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 649 {
 650         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 651
 652         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 653         if (beiscsi_ep->cid_vld == 1)
 654                 return 1;
 655         else
 656                 return 0;
 657 }
 658
 659 /**
 660  * beiscsi_close_conn - Upload the  connection
 661  * @ep: The iscsi endpoint
 662  * @flag: The type of connection closure
 663  */
 664 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 665 {
 666         int ret = 0;
 667         unsigned int tag;
 668         struct beiscsi_hba *phba = beiscsi_ep->phba;
 669
 670         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 671         if (!tag) {
 672                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
 673                          beiscsi_ep->ep_cid);
 674                 ret = -EAGAIN;
 675         } else {
 676                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 677                                          phba->ctrl.mcc_numtag[tag]);
 678                 free_mcc_tag(&phba->ctrl, tag);
 679         }
 680         return ret;
 681 }
 682
 683 /**
 684  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 685  * @phba: The phba instance
 686  * @cid: The cid to free
 687  */
 688 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 689                                       unsigned int cid)
 690 {
 691         if (phba->conn_table[cid])
 692                 phba->conn_table[cid] = NULL;
 693         else {
 694                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
 695                 return -EINVAL;
 696         }
 697         return 0;
 698 }
 699
 700 /**
 701  * beiscsi_ep_disconnect - Tears down the TCP connection
 702  * @ep: endpoint to be used
 703  *
 704  * Tears down the TCP connection
 705  */
 706 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 707 {
 708         struct beiscsi_conn *beiscsi_conn;
 709         struct beiscsi_endpoint *beiscsi_ep;
 710         struct beiscsi_hba *phba;
 711         unsigned int tag;
 712         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 713
 714         beiscsi_ep = ep->dd_data;
 715         phba = beiscsi_ep->phba;
 716         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 717                              beiscsi_ep->ep_cid);
 718
 719         if (!beiscsi_ep->conn) {
 720                 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
 721                          "beiscsi_ep\n");
 722                 return;
 723         }
 724         beiscsi_conn = beiscsi_ep->conn;
 725         iscsi_suspend_queue(beiscsi_conn->conn);
 726
 727         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
 728                  beiscsi_ep->ep_cid);
 729
 730         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 731                                             beiscsi_ep->ep_cid, 1,
 732                                             savecfg_flag);
 733         if (!tag) {
 734                 SE_DEBUG(DBG_LVL_1,
 735                          "mgmt_invalidate_connection Failed for cid=%d\n",
 736                           beiscsi_ep->ep_cid);
 737         } else {
 738                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 739                                          phba->ctrl.mcc_numtag[tag]);
 740                 free_mcc_tag(&phba->ctrl, tag);
 741         }
 742
 743         beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 744         beiscsi_free_ep(beiscsi_ep);
 745         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 746         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 747 }