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