drivers/scsi/be2iscsi/be_iscsi.c

   1 /**
   2  * Copyright (C) 2005 - 2011 Emulex
   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 (jayamohan.kallickal@emulex.com)
  11  *
  12  * Contact Information:
  13  * linux-drivers@emulex.com
  14  *
  15  * Emulex
  16  * 3333 Susan Street
  17  * Costa Mesa, CA 92626
  18  */
  19
  20 #include <scsi/libiscsi.h>
  21 #include <scsi/scsi_transport_iscsi.h>
  22 #include <scsi/scsi_transport.h>
  23 #include <scsi/scsi_cmnd.h>
  24 #include <scsi/scsi_device.h>
  25 #include <scsi/scsi_host.h>
  26 #include <scsi/scsi.h>
  27
  28 #include "be_iscsi.h"
  29
  30 extern struct iscsi_transport beiscsi_iscsi_transport;
  31
  32 /**
  33  * beiscsi_session_create - creates a new iscsi session
  34  * @cmds_max: max commands supported
  35  * @qdepth: max queue depth supported
  36  * @initial_cmdsn: initial iscsi CMDSN
  37  */
  38 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  39                                                  u16 cmds_max,
  40                                                  u16 qdepth,
  41                                                  u32 initial_cmdsn)
  42 {
  43         struct Scsi_Host *shost;
  44         struct beiscsi_endpoint *beiscsi_ep;
  45         struct iscsi_cls_session *cls_session;
  46         struct beiscsi_hba *phba;
  47         struct iscsi_session *sess;
  48         struct beiscsi_session *beiscsi_sess;
  49         struct beiscsi_io_task *io_task;
  50
  51         SE_DEBUG(DBG_LVL_8, "In beiscsi_session_create\n");
  52
  53         if (!ep) {
  54                 SE_DEBUG(DBG_LVL_1, "beiscsi_session_create: invalid ep\n");
  55                 return NULL;
  56         }
  57         beiscsi_ep = ep->dd_data;
  58         phba = beiscsi_ep->phba;
  59         shost = phba->shost;
  60         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  61                 shost_printk(KERN_ERR, shost, "Cannot handle %d cmds."
  62                              "Max cmds per session supported is %d. Using %d. "
  63                              "\n", cmds_max,
  64                               beiscsi_ep->phba->params.wrbs_per_cxn,
  65                               beiscsi_ep->phba->params.wrbs_per_cxn);
  66                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  67         }
  68
  69         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  70                                           shost, cmds_max,
  71                                           sizeof(*beiscsi_sess),
  72                                           sizeof(*io_task),
  73                                           initial_cmdsn, ISCSI_MAX_TARGET);
  74         if (!cls_session)
  75                 return NULL;
  76         sess = cls_session->dd_data;
  77         beiscsi_sess = sess->dd_data;
  78         beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
  79                                                    phba->pcidev,
  80                                                    sizeof(struct be_cmd_bhs),
  81                                                    64, 0);
  82         if (!beiscsi_sess->bhs_pool)
  83                 goto destroy_sess;
  84
  85         return cls_session;
  86 destroy_sess:
  87         iscsi_session_teardown(cls_session);
  88         return NULL;
  89 }
  90
  91 /**
  92  * beiscsi_session_destroy - destroys iscsi session
  93  * @cls_session:        pointer to iscsi cls session
  94  *
  95  * Destroys iSCSI session instance and releases
  96  * resources allocated for it.
  97  */
  98 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
  99 {
 100         struct iscsi_session *sess = cls_session->dd_data;
 101         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 102
 103         SE_DEBUG(DBG_LVL_8, "In beiscsi_session_destroy\n");
 104         pci_pool_destroy(beiscsi_sess->bhs_pool);
 105         iscsi_session_teardown(cls_session);
 106 }
 107
 108 /**
 109  * beiscsi_conn_create - create an instance of iscsi connection
 110  * @cls_session: ptr to iscsi_cls_session
 111  * @cid: iscsi cid
 112  */
 113 struct iscsi_cls_conn *
 114 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 115 {
 116         struct beiscsi_hba *phba;
 117         struct Scsi_Host *shost;
 118         struct iscsi_cls_conn *cls_conn;
 119         struct beiscsi_conn *beiscsi_conn;
 120         struct iscsi_conn *conn;
 121         struct iscsi_session *sess;
 122         struct beiscsi_session *beiscsi_sess;
 123
 124         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_create ,cid"
 125                  "from iscsi layer=%d\n", cid);
 126         shost = iscsi_session_to_shost(cls_session);
 127         phba = iscsi_host_priv(shost);
 128
 129         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 130         if (!cls_conn)
 131                 return NULL;
 132
 133         conn = cls_conn->dd_data;
 134         beiscsi_conn = conn->dd_data;
 135         beiscsi_conn->ep = NULL;
 136         beiscsi_conn->phba = phba;
 137         beiscsi_conn->conn = conn;
 138         sess = cls_session->dd_data;
 139         beiscsi_sess = sess->dd_data;
 140         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 141         return cls_conn;
 142 }
 143
 144 /**
 145  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 146  * @beiscsi_conn: The pointer to  beiscsi_conn structure
 147  * @phba: The phba instance
 148  * @cid: The cid to free
 149  */
 150 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 151                                 struct beiscsi_conn *beiscsi_conn,
 152                                 unsigned int cid)
 153 {
 154         if (phba->conn_table[cid]) {
 155                 SE_DEBUG(DBG_LVL_1,
 156                          "Connection table already occupied. Detected clash\n");
 157                 return -EINVAL;
 158         } else {
 159                 SE_DEBUG(DBG_LVL_8, "phba->conn_table[%d]=%p(beiscsi_conn)\n",
 160                          cid, beiscsi_conn);
 161                 phba->conn_table[cid] = beiscsi_conn;
 162         }
 163         return 0;
 164 }
 165
 166 /**
 167  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 168  * @cls_session: pointer to iscsi cls session
 169  * @cls_conn: pointer to iscsi cls conn
 170  * @transport_fd: EP handle(64 bit)
 171  *
 172  * This function binds the TCP Conn with iSCSI Connection and Session.
 173  */
 174 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 175                       struct iscsi_cls_conn *cls_conn,
 176                       u64 transport_fd, int is_leading)
 177 {
 178         struct iscsi_conn *conn = cls_conn->dd_data;
 179         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 180         struct Scsi_Host *shost =
 181                 (struct Scsi_Host *)iscsi_session_to_shost(cls_session);
 182         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 183         struct beiscsi_endpoint *beiscsi_ep;
 184         struct iscsi_endpoint *ep;
 185
 186         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
 187         ep = iscsi_lookup_endpoint(transport_fd);
 188         if (!ep)
 189                 return -EINVAL;
 190
 191         beiscsi_ep = ep->dd_data;
 192
 193         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 194                 return -EINVAL;
 195
 196         if (beiscsi_ep->phba != phba) {
 197                 SE_DEBUG(DBG_LVL_8,
 198                          "beiscsi_ep->hba=%p not equal to phba=%p\n",
 199                          beiscsi_ep->phba, phba);
 200                 return -EEXIST;
 201         }
 202
 203         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 204         beiscsi_conn->ep = beiscsi_ep;
 205         beiscsi_ep->conn = beiscsi_conn;
 206         SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n",
 207                  beiscsi_conn, conn, beiscsi_ep->ep_cid);
 208         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 209 }
 210
 211 /**
 212  * beiscsi_ep_get_param - get the iscsi parameter
 213  * @ep: pointer to iscsi ep
 214  * @param: parameter type identifier
 215  * @buf: buffer pointer
 216  *
 217  * returns iscsi parameter
 218  */
 219 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 220                            enum iscsi_param param, char *buf)
 221 {
 222         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 223         int len = 0;
 224
 225         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
 226
 227         switch (param) {
 228         case ISCSI_PARAM_CONN_PORT:
 229                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 230                 break;
 231         case ISCSI_PARAM_CONN_ADDRESS:
 232                 if (beiscsi_ep->ip_type == BE2_IPV4)
 233                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 234                 else
 235                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 236                 break;
 237         default:
 238                 return -ENOSYS;
 239         }
 240         return len;
 241 }
 242
 243 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 244                       enum iscsi_param param, char *buf, int buflen)
 245 {
 246         struct iscsi_conn *conn = cls_conn->dd_data;
 247         struct iscsi_session *session = conn->session;
 248         int ret;
 249
 250         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
 251         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 252         if (ret)
 253                 return ret;
 254         /*
 255          * If userspace tried to set the value to higher than we can
 256          * support override here.
 257          */
 258         switch (param) {
 259         case ISCSI_PARAM_FIRST_BURST:
 260                 if (session->first_burst > 8192)
 261                         session->first_burst = 8192;
 262                 break;
 263         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 264                 if (conn->max_recv_dlength > 65536)
 265                         conn->max_recv_dlength = 65536;
 266                 break;
 267         case ISCSI_PARAM_MAX_BURST:
 268                 if (session->max_burst > 262144)
 269                         session->max_burst = 262144;
 270                 break;
 271         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 272                 if ((conn->max_xmit_dlength > 65536) ||
 273                     (conn->max_xmit_dlength == 0))
 274                         conn->max_xmit_dlength = 65536;
 275         default:
 276                 return 0;
 277         }
 278
 279         return 0;
 280 }
 281
 282 /**
 283  * beiscsi_get_host_param - get the iscsi parameter
 284  * @shost: pointer to scsi_host structure
 285  * @param: parameter type identifier
 286  * @buf: buffer pointer
 287  *
 288  * returns host parameter
 289  */
 290 int beiscsi_get_host_param(struct Scsi_Host *shost,
 291                            enum iscsi_host_param param, char *buf)
 292 {
 293         struct beiscsi_hba *phba = (struct beiscsi_hba *)iscsi_host_priv(shost);
 294         int status = 0;
 295
 296         SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 297         switch (param) {
 298         case ISCSI_HOST_PARAM_HWADDRESS:
 299                 status = beiscsi_get_macaddr(buf, phba);
 300                 if (status < 0) {
 301                         SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
 302                         return status;
 303                 }
 304                 break;
 305         default:
 306                 return iscsi_host_get_param(shost, param, buf);
 307         }
 308         return status;
 309 }
 310
 311 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 312 {
 313         struct be_cmd_resp_get_mac_addr *resp;
 314         struct be_mcc_wrb *wrb;
 315         unsigned int tag, wrb_num;
 316         unsigned short status, extd_status;
 317         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 318         int rc;
 319
 320         if (phba->read_mac_address)
 321                 return sysfs_format_mac(buf, phba->mac_address,
 322                                         ETH_ALEN);
 323
 324         tag = be_cmd_get_mac_addr(phba);
 325         if (!tag) {
 326                 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
 327                 return -EBUSY;
 328         } else
 329                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 330                                          phba->ctrl.mcc_numtag[tag]);
 331
 332         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 333         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 334         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 335         if (status || extd_status) {
 336                 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
 337                                     " status = %d extd_status = %d\n",
 338                                     status, extd_status);
 339                 free_mcc_tag(&phba->ctrl, tag);
 340                 return -EAGAIN;
 341         }
 342         wrb = queue_get_wrb(mccq, wrb_num);
 343         free_mcc_tag(&phba->ctrl, tag);
 344         resp = embedded_payload(wrb);
 345         memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 346         rc = sysfs_format_mac(buf, phba->mac_address,
 347                                ETH_ALEN);
 348         phba->read_mac_address = 1;
 349         return rc;
 350 }
 351
 352
 353 /**
 354  * beiscsi_conn_get_stats - get the iscsi stats
 355  * @cls_conn: pointer to iscsi cls conn
 356  * @stats: pointer to iscsi_stats structure
 357  *
 358  * returns iscsi stats
 359  */
 360 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 361                             struct iscsi_stats *stats)
 362 {
 363         struct iscsi_conn *conn = cls_conn->dd_data;
 364
 365         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 366         stats->txdata_octets = conn->txdata_octets;
 367         stats->rxdata_octets = conn->rxdata_octets;
 368         stats->dataout_pdus = conn->dataout_pdus_cnt;
 369         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 370         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 371         stats->datain_pdus = conn->datain_pdus_cnt;
 372         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 373         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 374         stats->r2t_pdus = conn->r2t_pdus_cnt;
 375         stats->digest_err = 0;
 376         stats->timeout_err = 0;
 377         stats->custom_length = 0;
 378         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 379         stats->custom[0].value = conn->eh_abort_cnt;
 380 }
 381
 382 /**
 383  * beiscsi_set_params_for_offld - get the parameters for offload
 384  * @beiscsi_conn: pointer to beiscsi_conn
 385  * @params: pointer to offload_params structure
 386  */
 387 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 388                                           struct beiscsi_offload_params *params)
 389 {
 390         struct iscsi_conn *conn = beiscsi_conn->conn;
 391         struct iscsi_session *session = conn->session;
 392
 393         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 394                       params, session->max_burst);
 395         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 396                       max_send_data_segment_length, params,
 397                       conn->max_xmit_dlength);
 398         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 399                       params, session->first_burst);
 400         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 401                       session->erl);
 402         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 403                       conn->datadgst_en);
 404         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 405                       conn->hdrdgst_en);
 406         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 407                       session->initial_r2t_en);
 408         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 409                       session->imm_data_en);
 410         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 411                       (conn->exp_statsn - 1));
 412 }
 413
 414 /**
 415  * beiscsi_conn_start - offload of session to chip
 416  * @cls_conn: pointer to beiscsi_conn
 417  */
 418 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 419 {
 420         struct iscsi_conn *conn = cls_conn->dd_data;
 421         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 422         struct beiscsi_endpoint *beiscsi_ep;
 423         struct beiscsi_offload_params params;
 424
 425         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 426         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 427         beiscsi_ep = beiscsi_conn->ep;
 428         if (!beiscsi_ep)
 429                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 430
 431         beiscsi_conn->login_in_progress = 0;
 432         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 433         beiscsi_offload_connection(beiscsi_conn, &params);
 434         iscsi_conn_start(cls_conn);
 435         return 0;
 436 }
 437
 438 /**
 439  * beiscsi_get_cid - Allocate a cid
 440  * @phba: The phba instance
 441  */
 442 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 443 {
 444         unsigned short cid = 0xFFFF;
 445
 446         if (!phba->avlbl_cids)
 447                 return cid;
 448
 449         cid = phba->cid_array[phba->cid_alloc++];
 450         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 451                 phba->cid_alloc = 0;
 452         phba->avlbl_cids--;
 453         return cid;
 454 }
 455
 456 /**
 457  * beiscsi_put_cid - Free the cid
 458  * @phba: The phba for which the cid is being freed
 459  * @cid: The cid to free
 460  */
 461 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 462 {
 463         phba->avlbl_cids++;
 464         phba->cid_array[phba->cid_free++] = cid;
 465         if (phba->cid_free == phba->params.cxns_per_ctrl)
 466                 phba->cid_free = 0;
 467 }
 468
 469 /**
 470  * beiscsi_free_ep - free endpoint
 471  * @ep: pointer to iscsi endpoint structure
 472  */
 473 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 474 {
 475         struct beiscsi_hba *phba = beiscsi_ep->phba;
 476
 477         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 478         beiscsi_ep->phba = NULL;
 479 }
 480
 481 /**
 482  * beiscsi_open_conn - Ask FW to open a TCP connection
 483  * @ep: endpoint to be used
 484  * @src_addr: The source IP address
 485  * @dst_addr: The Destination  IP address
 486  *
 487  * Asks the FW to open a TCP connection
 488  */
 489 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 490                              struct sockaddr *src_addr,
 491                              struct sockaddr *dst_addr, int non_blocking)
 492 {
 493         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 494         struct beiscsi_hba *phba = beiscsi_ep->phba;
 495         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 496         struct be_mcc_wrb *wrb;
 497         struct tcp_connect_and_offload_out *ptcpcnct_out;
 498         unsigned short status, extd_status;
 499         struct be_dma_mem nonemb_cmd;
 500         unsigned int tag, wrb_num;
 501         int ret = -ENOMEM;
 502
 503         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 504         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 505         if (beiscsi_ep->ep_cid == 0xFFFF) {
 506                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 507                 return ret;
 508         }
 509         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
 510                  beiscsi_ep->ep_cid);
 511         phba->ep_array[beiscsi_ep->ep_cid -
 512                        phba->fw_config.iscsi_cid_start] = ep;
 513         if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 514                                   phba->params.cxns_per_ctrl * 2)) {
 515                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 516                 goto free_ep;
 517         }
 518
 519         beiscsi_ep->cid_vld = 0;
 520         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
 521                                 sizeof(struct tcp_connect_and_offload_in),
 522                                 &nonemb_cmd.dma);
 523         if (nonemb_cmd.va == NULL) {
 524                 SE_DEBUG(DBG_LVL_1,
 525                          "Failed to allocate memory for mgmt_open_connection"
 526                          "\n");
 527                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 528                 return -ENOMEM;
 529         }
 530         nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
 531         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
 532         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
 533         if (!tag) {
 534                 SE_DEBUG(DBG_LVL_1,
 535                          "mgmt_open_connection Failed for cid=%d\n",
 536                          beiscsi_ep->ep_cid);
 537                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 538                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 539                                     nonemb_cmd.va, nonemb_cmd.dma);
 540                 return -EAGAIN;
 541         } else {
 542                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 543                                          phba->ctrl.mcc_numtag[tag]);
 544         }
 545         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 546         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 547         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 548         if (status || extd_status) {
 549                 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 550                                     " status = %d extd_status = %d\n",
 551                                     status, extd_status);
 552                 free_mcc_tag(&phba->ctrl, tag);
 553                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 554                             nonemb_cmd.va, nonemb_cmd.dma);
 555                 goto free_ep;
 556         } else {
 557                 wrb = queue_get_wrb(mccq, wrb_num);
 558                 free_mcc_tag(&phba->ctrl, tag);
 559
 560                 ptcpcnct_out = embedded_payload(wrb);
 561                 beiscsi_ep = ep->dd_data;
 562                 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 563                 beiscsi_ep->cid_vld = 1;
 564                 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 565         }
 566         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 567                             nonemb_cmd.va, nonemb_cmd.dma);
 568         return 0;
 569
 570 free_ep:
 571         beiscsi_free_ep(beiscsi_ep);
 572         return -EBUSY;
 573 }
 574
 575 /**
 576  * beiscsi_ep_connect - Ask chip to create TCP Conn
 577  * @scsi_host: Pointer to scsi_host structure
 578  * @dst_addr: The IP address of Target
 579  * @non_blocking: blocking or non-blocking call
 580  *
 581  * This routines first asks chip to create a connection and then allocates an EP
 582  */
 583 struct iscsi_endpoint *
 584 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 585                    int non_blocking)
 586 {
 587         struct beiscsi_hba *phba;
 588         struct beiscsi_endpoint *beiscsi_ep;
 589         struct iscsi_endpoint *ep;
 590         int ret;
 591
 592         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
 593         if (shost)
 594                 phba = iscsi_host_priv(shost);
 595         else {
 596                 ret = -ENXIO;
 597                 SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
 598                 return ERR_PTR(ret);
 599         }
 600
 601         if (phba->state != BE_ADAPTER_UP) {
 602                 ret = -EBUSY;
 603                 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
 604                 return ERR_PTR(ret);
 605         }
 606
 607         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 608         if (!ep) {
 609                 ret = -ENOMEM;
 610                 return ERR_PTR(ret);
 611         }
 612
 613         beiscsi_ep = ep->dd_data;
 614         beiscsi_ep->phba = phba;
 615         beiscsi_ep->openiscsi_ep = ep;
 616         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
 617         if (ret) {
 618                 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
 619                 goto free_ep;
 620         }
 621
 622         return ep;
 623
 624 free_ep:
 625         iscsi_destroy_endpoint(ep);
 626         return ERR_PTR(ret);
 627 }
 628
 629 /**
 630  * beiscsi_ep_poll - Poll to see if connection is established
 631  * @ep: endpoint to be used
 632  * @timeout_ms: timeout specified in millisecs
 633  *
 634  * Poll to see if TCP connection established
 635  */
 636 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 637 {
 638         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 639
 640         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 641         if (beiscsi_ep->cid_vld == 1)
 642                 return 1;
 643         else
 644                 return 0;
 645 }
 646
 647 /**
 648  * beiscsi_close_conn - Upload the  connection
 649  * @ep: The iscsi endpoint
 650  * @flag: The type of connection closure
 651  */
 652 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 653 {
 654         int ret = 0;
 655         unsigned int tag;
 656         struct beiscsi_hba *phba = beiscsi_ep->phba;
 657
 658         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 659         if (!tag) {
 660                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
 661                          beiscsi_ep->ep_cid);
 662                 ret = -EAGAIN;
 663         } else {
 664                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 665                                          phba->ctrl.mcc_numtag[tag]);
 666                 free_mcc_tag(&phba->ctrl, tag);
 667         }
 668         return ret;
 669 }
 670
 671 /**
 672  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 673  * @phba: The phba instance
 674  * @cid: The cid to free
 675  */
 676 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 677                                       unsigned int cid)
 678 {
 679         if (phba->conn_table[cid])
 680                 phba->conn_table[cid] = NULL;
 681         else {
 682                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
 683                 return -EINVAL;
 684         }
 685         return 0;
 686 }
 687
 688 /**
 689  * beiscsi_ep_disconnect - Tears down the TCP connection
 690  * @ep: endpoint to be used
 691  *
 692  * Tears down the TCP connection
 693  */
 694 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 695 {
 696         struct beiscsi_conn *beiscsi_conn;
 697         struct beiscsi_endpoint *beiscsi_ep;
 698         struct beiscsi_hba *phba;
 699         unsigned int tag;
 700         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 701
 702         beiscsi_ep = ep->dd_data;
 703         phba = beiscsi_ep->phba;
 704         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 705                              beiscsi_ep->ep_cid);
 706
 707         if (!beiscsi_ep->conn) {
 708                 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
 709                          "beiscsi_ep\n");
 710                 return;
 711         }
 712         beiscsi_conn = beiscsi_ep->conn;
 713         iscsi_suspend_queue(beiscsi_conn->conn);
 714
 715         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
 716                  beiscsi_ep->ep_cid);
 717
 718         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 719                                             beiscsi_ep->ep_cid, 1,
 720                                             savecfg_flag);
 721         if (!tag) {
 722                 SE_DEBUG(DBG_LVL_1,
 723                          "mgmt_invalidate_connection Failed for cid=%d\n",
 724                           beiscsi_ep->ep_cid);
 725         } else {
 726                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 727                                          phba->ctrl.mcc_numtag[tag]);
 728                 free_mcc_tag(&phba->ctrl, tag);
 729         }
 730
 731         beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 732         beiscsi_free_ep(beiscsi_ep);
 733         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 734         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 735 }