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_ep_get_param - get the iscsi parameter
 214  * @ep: pointer to iscsi ep
 215  * @param: parameter type identifier
 216  * @buf: buffer pointer
 217  *
 218  * returns iscsi parameter
 219  */
 220 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 221                            enum iscsi_param param, char *buf)
 222 {
 223         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 224         int len = 0;
 225
 226         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
 227
 228         switch (param) {
 229         case ISCSI_PARAM_CONN_PORT:
 230                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 231                 break;
 232         case ISCSI_PARAM_CONN_ADDRESS:
 233                 if (beiscsi_ep->ip_type == BE2_IPV4)
 234                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 235                 else
 236                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 237                 break;
 238         default:
 239                 return -ENOSYS;
 240         }
 241         return len;
 242 }
 243
 244 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 245                       enum iscsi_param param, char *buf, int buflen)
 246 {
 247         struct iscsi_conn *conn = cls_conn->dd_data;
 248         struct iscsi_session *session = conn->session;
 249         int ret;
 250
 251         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
 252         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 253         if (ret)
 254                 return ret;
 255         /*
 256          * If userspace tried to set the value to higher than we can
 257          * support override here.
 258          */
 259         switch (param) {
 260         case ISCSI_PARAM_FIRST_BURST:
 261                 if (session->first_burst > 8192)
 262                         session->first_burst = 8192;
 263                 break;
 264         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 265                 if (conn->max_recv_dlength > 65536)
 266                         conn->max_recv_dlength = 65536;
 267                 break;
 268         case ISCSI_PARAM_MAX_BURST:
 269                 if (session->max_burst > 262144)
 270                         session->max_burst = 262144;
 271                 break;
 272         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 273                 if ((conn->max_xmit_dlength > 65536) ||
 274                     (conn->max_xmit_dlength == 0))
 275                         conn->max_xmit_dlength = 65536;
 276         default:
 277                 return 0;
 278         }
 279
 280         return 0;
 281 }
 282
 283 /**
 284  * beiscsi_get_host_param - get the iscsi parameter
 285  * @shost: pointer to scsi_host structure
 286  * @param: parameter type identifier
 287  * @buf: buffer pointer
 288  *
 289  * returns host parameter
 290  */
 291 int beiscsi_get_host_param(struct Scsi_Host *shost,
 292                            enum iscsi_host_param param, char *buf)
 293 {
 294         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 295         int status = 0;
 296
 297         SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 298         switch (param) {
 299         case ISCSI_HOST_PARAM_HWADDRESS:
 300                 status = beiscsi_get_macaddr(buf, phba);
 301                 if (status < 0) {
 302                         SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
 303                         return status;
 304                 }
 305                 break;
 306         default:
 307                 return iscsi_host_get_param(shost, param, buf);
 308         }
 309         return status;
 310 }
 311
 312 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 313 {
 314         struct be_cmd_resp_get_mac_addr *resp;
 315         struct be_mcc_wrb *wrb;
 316         unsigned int tag, wrb_num;
 317         unsigned short status, extd_status;
 318         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 319         int rc;
 320
 321         if (phba->read_mac_address)
 322                 return sysfs_format_mac(buf, phba->mac_address,
 323                                         ETH_ALEN);
 324
 325         tag = be_cmd_get_mac_addr(phba);
 326         if (!tag) {
 327                 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
 328                 return -EBUSY;
 329         } else
 330                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 331                                          phba->ctrl.mcc_numtag[tag]);
 332
 333         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 334         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 335         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 336         if (status || extd_status) {
 337                 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
 338                                     " status = %d extd_status = %d\n",
 339                                     status, extd_status);
 340                 free_mcc_tag(&phba->ctrl, tag);
 341                 return -EAGAIN;
 342         }
 343         wrb = queue_get_wrb(mccq, wrb_num);
 344         free_mcc_tag(&phba->ctrl, tag);
 345         resp = embedded_payload(wrb);
 346         memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 347         rc = sysfs_format_mac(buf, phba->mac_address,
 348                                ETH_ALEN);
 349         phba->read_mac_address = 1;
 350         return rc;
 351 }
 352
 353
 354 /**
 355  * beiscsi_conn_get_stats - get the iscsi stats
 356  * @cls_conn: pointer to iscsi cls conn
 357  * @stats: pointer to iscsi_stats structure
 358  *
 359  * returns iscsi stats
 360  */
 361 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 362                             struct iscsi_stats *stats)
 363 {
 364         struct iscsi_conn *conn = cls_conn->dd_data;
 365
 366         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 367         stats->txdata_octets = conn->txdata_octets;
 368         stats->rxdata_octets = conn->rxdata_octets;
 369         stats->dataout_pdus = conn->dataout_pdus_cnt;
 370         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 371         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 372         stats->datain_pdus = conn->datain_pdus_cnt;
 373         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 374         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 375         stats->r2t_pdus = conn->r2t_pdus_cnt;
 376         stats->digest_err = 0;
 377         stats->timeout_err = 0;
 378         stats->custom_length = 0;
 379         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 380         stats->custom[0].value = conn->eh_abort_cnt;
 381 }
 382
 383 /**
 384  * beiscsi_set_params_for_offld - get the parameters for offload
 385  * @beiscsi_conn: pointer to beiscsi_conn
 386  * @params: pointer to offload_params structure
 387  */
 388 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 389                                           struct beiscsi_offload_params *params)
 390 {
 391         struct iscsi_conn *conn = beiscsi_conn->conn;
 392         struct iscsi_session *session = conn->session;
 393
 394         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 395                       params, session->max_burst);
 396         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 397                       max_send_data_segment_length, params,
 398                       conn->max_xmit_dlength);
 399         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 400                       params, session->first_burst);
 401         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 402                       session->erl);
 403         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 404                       conn->datadgst_en);
 405         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 406                       conn->hdrdgst_en);
 407         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 408                       session->initial_r2t_en);
 409         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 410                       session->imm_data_en);
 411         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 412                       (conn->exp_statsn - 1));
 413 }
 414
 415 /**
 416  * beiscsi_conn_start - offload of session to chip
 417  * @cls_conn: pointer to beiscsi_conn
 418  */
 419 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 420 {
 421         struct iscsi_conn *conn = cls_conn->dd_data;
 422         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 423         struct beiscsi_endpoint *beiscsi_ep;
 424         struct beiscsi_offload_params params;
 425
 426         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 427         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 428         beiscsi_ep = beiscsi_conn->ep;
 429         if (!beiscsi_ep)
 430                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 431
 432         beiscsi_conn->login_in_progress = 0;
 433         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 434         beiscsi_offload_connection(beiscsi_conn, &params);
 435         iscsi_conn_start(cls_conn);
 436         return 0;
 437 }
 438
 439 /**
 440  * beiscsi_get_cid - Allocate a cid
 441  * @phba: The phba instance
 442  */
 443 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 444 {
 445         unsigned short cid = 0xFFFF;
 446
 447         if (!phba->avlbl_cids)
 448                 return cid;
 449
 450         cid = phba->cid_array[phba->cid_alloc++];
 451         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 452                 phba->cid_alloc = 0;
 453         phba->avlbl_cids--;
 454         return cid;
 455 }
 456
 457 /**
 458  * beiscsi_put_cid - Free the cid
 459  * @phba: The phba for which the cid is being freed
 460  * @cid: The cid to free
 461  */
 462 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 463 {
 464         phba->avlbl_cids++;
 465         phba->cid_array[phba->cid_free++] = cid;
 466         if (phba->cid_free == phba->params.cxns_per_ctrl)
 467                 phba->cid_free = 0;
 468 }
 469
 470 /**
 471  * beiscsi_free_ep - free endpoint
 472  * @ep: pointer to iscsi endpoint structure
 473  */
 474 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 475 {
 476         struct beiscsi_hba *phba = beiscsi_ep->phba;
 477
 478         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 479         beiscsi_ep->phba = NULL;
 480 }
 481
 482 /**
 483  * beiscsi_open_conn - Ask FW to open a TCP connection
 484  * @ep: endpoint to be used
 485  * @src_addr: The source IP address
 486  * @dst_addr: The Destination  IP address
 487  *
 488  * Asks the FW to open a TCP connection
 489  */
 490 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 491                              struct sockaddr *src_addr,
 492                              struct sockaddr *dst_addr, int non_blocking)
 493 {
 494         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 495         struct beiscsi_hba *phba = beiscsi_ep->phba;
 496         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 497         struct be_mcc_wrb *wrb;
 498         struct tcp_connect_and_offload_out *ptcpcnct_out;
 499         unsigned short status, extd_status;
 500         struct be_dma_mem nonemb_cmd;
 501         unsigned int tag, wrb_num;
 502         int ret = -ENOMEM;
 503
 504         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 505         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 506         if (beiscsi_ep->ep_cid == 0xFFFF) {
 507                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 508                 return ret;
 509         }
 510         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
 511                  beiscsi_ep->ep_cid);
 512         phba->ep_array[beiscsi_ep->ep_cid -
 513                        phba->fw_config.iscsi_cid_start] = ep;
 514         if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 515                                   phba->params.cxns_per_ctrl * 2)) {
 516                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 517                 goto free_ep;
 518         }
 519
 520         beiscsi_ep->cid_vld = 0;
 521         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
 522                                 sizeof(struct tcp_connect_and_offload_in),
 523                                 &nonemb_cmd.dma);
 524         if (nonemb_cmd.va == NULL) {
 525                 SE_DEBUG(DBG_LVL_1,
 526                          "Failed to allocate memory for mgmt_open_connection"
 527                          "\n");
 528                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 529                 return -ENOMEM;
 530         }
 531         nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
 532         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
 533         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
 534         if (!tag) {
 535                 SE_DEBUG(DBG_LVL_1,
 536                          "mgmt_open_connection Failed for cid=%d\n",
 537                          beiscsi_ep->ep_cid);
 538                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 539                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 540                                     nonemb_cmd.va, nonemb_cmd.dma);
 541                 return -EAGAIN;
 542         } else {
 543                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 544                                          phba->ctrl.mcc_numtag[tag]);
 545         }
 546         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 547         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 548         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 549         if (status || extd_status) {
 550                 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 551                                     " status = %d extd_status = %d\n",
 552                                     status, extd_status);
 553                 free_mcc_tag(&phba->ctrl, tag);
 554                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 555                             nonemb_cmd.va, nonemb_cmd.dma);
 556                 goto free_ep;
 557         } else {
 558                 wrb = queue_get_wrb(mccq, wrb_num);
 559                 free_mcc_tag(&phba->ctrl, tag);
 560
 561                 ptcpcnct_out = embedded_payload(wrb);
 562                 beiscsi_ep = ep->dd_data;
 563                 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 564                 beiscsi_ep->cid_vld = 1;
 565                 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 566         }
 567         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 568                             nonemb_cmd.va, nonemb_cmd.dma);
 569         return 0;
 570
 571 free_ep:
 572         beiscsi_free_ep(beiscsi_ep);
 573         return -EBUSY;
 574 }
 575
 576 /**
 577  * beiscsi_ep_connect - Ask chip to create TCP Conn
 578  * @scsi_host: Pointer to scsi_host structure
 579  * @dst_addr: The IP address of Target
 580  * @non_blocking: blocking or non-blocking call
 581  *
 582  * This routines first asks chip to create a connection and then allocates an EP
 583  */
 584 struct iscsi_endpoint *
 585 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 586                    int non_blocking)
 587 {
 588         struct beiscsi_hba *phba;
 589         struct beiscsi_endpoint *beiscsi_ep;
 590         struct iscsi_endpoint *ep;
 591         int ret;
 592
 593         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
 594         if (shost)
 595                 phba = iscsi_host_priv(shost);
 596         else {
 597                 ret = -ENXIO;
 598                 SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
 599                 return ERR_PTR(ret);
 600         }
 601
 602         if (phba->state != BE_ADAPTER_UP) {
 603                 ret = -EBUSY;
 604                 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
 605                 return ERR_PTR(ret);
 606         }
 607
 608         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 609         if (!ep) {
 610                 ret = -ENOMEM;
 611                 return ERR_PTR(ret);
 612         }
 613
 614         beiscsi_ep = ep->dd_data;
 615         beiscsi_ep->phba = phba;
 616         beiscsi_ep->openiscsi_ep = ep;
 617         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
 618         if (ret) {
 619                 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
 620                 goto free_ep;
 621         }
 622
 623         return ep;
 624
 625 free_ep:
 626         iscsi_destroy_endpoint(ep);
 627         return ERR_PTR(ret);
 628 }
 629
 630 /**
 631  * beiscsi_ep_poll - Poll to see if connection is established
 632  * @ep: endpoint to be used
 633  * @timeout_ms: timeout specified in millisecs
 634  *
 635  * Poll to see if TCP connection established
 636  */
 637 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 638 {
 639         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 640
 641         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 642         if (beiscsi_ep->cid_vld == 1)
 643                 return 1;
 644         else
 645                 return 0;
 646 }
 647
 648 /**
 649  * beiscsi_close_conn - Upload the  connection
 650  * @ep: The iscsi endpoint
 651  * @flag: The type of connection closure
 652  */
 653 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 654 {
 655         int ret = 0;
 656         unsigned int tag;
 657         struct beiscsi_hba *phba = beiscsi_ep->phba;
 658
 659         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 660         if (!tag) {
 661                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
 662                          beiscsi_ep->ep_cid);
 663                 ret = -EAGAIN;
 664         } else {
 665                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 666                                          phba->ctrl.mcc_numtag[tag]);
 667                 free_mcc_tag(&phba->ctrl, tag);
 668         }
 669         return ret;
 670 }
 671
 672 /**
 673  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 674  * @phba: The phba instance
 675  * @cid: The cid to free
 676  */
 677 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 678                                       unsigned int cid)
 679 {
 680         if (phba->conn_table[cid])
 681                 phba->conn_table[cid] = NULL;
 682         else {
 683                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
 684                 return -EINVAL;
 685         }
 686         return 0;
 687 }
 688
 689 /**
 690  * beiscsi_ep_disconnect - Tears down the TCP connection
 691  * @ep: endpoint to be used
 692  *
 693  * Tears down the TCP connection
 694  */
 695 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 696 {
 697         struct beiscsi_conn *beiscsi_conn;
 698         struct beiscsi_endpoint *beiscsi_ep;
 699         struct beiscsi_hba *phba;
 700         unsigned int tag;
 701         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 702
 703         beiscsi_ep = ep->dd_data;
 704         phba = beiscsi_ep->phba;
 705         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 706                              beiscsi_ep->ep_cid);
 707
 708         if (!beiscsi_ep->conn) {
 709                 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
 710                          "beiscsi_ep\n");
 711                 return;
 712         }
 713         beiscsi_conn = beiscsi_ep->conn;
 714         iscsi_suspend_queue(beiscsi_conn->conn);
 715
 716         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
 717                  beiscsi_ep->ep_cid);
 718
 719         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 720                                             beiscsi_ep->ep_cid, 1,
 721                                             savecfg_flag);
 722         if (!tag) {
 723                 SE_DEBUG(DBG_LVL_1,
 724                          "mgmt_invalidate_connection Failed for cid=%d\n",
 725                           beiscsi_ep->ep_cid);
 726         } else {
 727                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 728                                          phba->ctrl.mcc_numtag[tag]);
 729                 free_mcc_tag(&phba->ctrl, tag);
 730         }
 731
 732         beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 733         beiscsi_free_ep(beiscsi_ep);
 734         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 735         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 736 }