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 = iscsi_session_to_shost(cls_session);
 181         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 182         struct beiscsi_endpoint *beiscsi_ep;
 183         struct iscsi_endpoint *ep;
 184
 185         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_bind\n");
 186         ep = iscsi_lookup_endpoint(transport_fd);
 187         if (!ep)
 188                 return -EINVAL;
 189
 190         beiscsi_ep = ep->dd_data;
 191
 192         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 193                 return -EINVAL;
 194
 195         if (beiscsi_ep->phba != phba) {
 196                 SE_DEBUG(DBG_LVL_8,
 197                          "beiscsi_ep->hba=%p not equal to phba=%p\n",
 198                          beiscsi_ep->phba, phba);
 199                 return -EEXIST;
 200         }
 201
 202         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 203         beiscsi_conn->ep = beiscsi_ep;
 204         beiscsi_ep->conn = beiscsi_conn;
 205         SE_DEBUG(DBG_LVL_8, "beiscsi_conn=%p conn=%p ep_cid=%d\n",
 206                  beiscsi_conn, conn, beiscsi_ep->ep_cid);
 207         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 208 }
 209
 210 /**
 211  * beiscsi_ep_get_param - get the iscsi parameter
 212  * @ep: pointer to iscsi ep
 213  * @param: parameter type identifier
 214  * @buf: buffer pointer
 215  *
 216  * returns iscsi parameter
 217  */
 218 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 219                            enum iscsi_param param, char *buf)
 220 {
 221         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 222         int len = 0;
 223
 224         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_param, param= %d\n", param);
 225
 226         switch (param) {
 227         case ISCSI_PARAM_CONN_PORT:
 228                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 229                 break;
 230         case ISCSI_PARAM_CONN_ADDRESS:
 231                 if (beiscsi_ep->ip_type == BE2_IPV4)
 232                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 233                 else
 234                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 235                 break;
 236         default:
 237                 return -ENOSYS;
 238         }
 239         return len;
 240 }
 241
 242 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 243                       enum iscsi_param param, char *buf, int buflen)
 244 {
 245         struct iscsi_conn *conn = cls_conn->dd_data;
 246         struct iscsi_session *session = conn->session;
 247         int ret;
 248
 249         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_set_param, param= %d\n", param);
 250         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 251         if (ret)
 252                 return ret;
 253         /*
 254          * If userspace tried to set the value to higher than we can
 255          * support override here.
 256          */
 257         switch (param) {
 258         case ISCSI_PARAM_FIRST_BURST:
 259                 if (session->first_burst > 8192)
 260                         session->first_burst = 8192;
 261                 break;
 262         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 263                 if (conn->max_recv_dlength > 65536)
 264                         conn->max_recv_dlength = 65536;
 265                 break;
 266         case ISCSI_PARAM_MAX_BURST:
 267                 if (session->max_burst > 262144)
 268                         session->max_burst = 262144;
 269                 break;
 270         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 271                 if ((conn->max_xmit_dlength > 65536) ||
 272                     (conn->max_xmit_dlength == 0))
 273                         conn->max_xmit_dlength = 65536;
 274         default:
 275                 return 0;
 276         }
 277
 278         return 0;
 279 }
 280
 281 /**
 282  * beiscsi_get_host_param - get the iscsi parameter
 283  * @shost: pointer to scsi_host structure
 284  * @param: parameter type identifier
 285  * @buf: buffer pointer
 286  *
 287  * returns host parameter
 288  */
 289 int beiscsi_get_host_param(struct Scsi_Host *shost,
 290                            enum iscsi_host_param param, char *buf)
 291 {
 292         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 293         int status = 0;
 294
 295         SE_DEBUG(DBG_LVL_8, "In beiscsi_get_host_param, param= %d\n", param);
 296         switch (param) {
 297         case ISCSI_HOST_PARAM_HWADDRESS:
 298                 status = beiscsi_get_macaddr(buf, phba);
 299                 if (status < 0) {
 300                         SE_DEBUG(DBG_LVL_1, "beiscsi_get_macaddr Failed\n");
 301                         return status;
 302                 }
 303                 break;
 304         default:
 305                 return iscsi_host_get_param(shost, param, buf);
 306         }
 307         return status;
 308 }
 309
 310 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 311 {
 312         struct be_cmd_resp_get_mac_addr *resp;
 313         struct be_mcc_wrb *wrb;
 314         unsigned int tag, wrb_num;
 315         unsigned short status, extd_status;
 316         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 317         int rc;
 318
 319         if (phba->read_mac_address)
 320                 return sysfs_format_mac(buf, phba->mac_address,
 321                                         ETH_ALEN);
 322
 323         tag = be_cmd_get_mac_addr(phba);
 324         if (!tag) {
 325                 SE_DEBUG(DBG_LVL_1, "be_cmd_get_mac_addr Failed\n");
 326                 return -EBUSY;
 327         } else
 328                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 329                                          phba->ctrl.mcc_numtag[tag]);
 330
 331         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 332         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 333         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 334         if (status || extd_status) {
 335                 SE_DEBUG(DBG_LVL_1, "Failed to get be_cmd_get_mac_addr"
 336                                     " status = %d extd_status = %d\n",
 337                                     status, extd_status);
 338                 free_mcc_tag(&phba->ctrl, tag);
 339                 return -EAGAIN;
 340         }
 341         wrb = queue_get_wrb(mccq, wrb_num);
 342         free_mcc_tag(&phba->ctrl, tag);
 343         resp = embedded_payload(wrb);
 344         memcpy(phba->mac_address, resp->mac_address, ETH_ALEN);
 345         rc = sysfs_format_mac(buf, phba->mac_address,
 346                                ETH_ALEN);
 347         phba->read_mac_address = 1;
 348         return rc;
 349 }
 350
 351
 352 /**
 353  * beiscsi_conn_get_stats - get the iscsi stats
 354  * @cls_conn: pointer to iscsi cls conn
 355  * @stats: pointer to iscsi_stats structure
 356  *
 357  * returns iscsi stats
 358  */
 359 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 360                             struct iscsi_stats *stats)
 361 {
 362         struct iscsi_conn *conn = cls_conn->dd_data;
 363
 364         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_get_stats\n");
 365         stats->txdata_octets = conn->txdata_octets;
 366         stats->rxdata_octets = conn->rxdata_octets;
 367         stats->dataout_pdus = conn->dataout_pdus_cnt;
 368         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 369         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 370         stats->datain_pdus = conn->datain_pdus_cnt;
 371         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 372         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 373         stats->r2t_pdus = conn->r2t_pdus_cnt;
 374         stats->digest_err = 0;
 375         stats->timeout_err = 0;
 376         stats->custom_length = 0;
 377         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 378         stats->custom[0].value = conn->eh_abort_cnt;
 379 }
 380
 381 /**
 382  * beiscsi_set_params_for_offld - get the parameters for offload
 383  * @beiscsi_conn: pointer to beiscsi_conn
 384  * @params: pointer to offload_params structure
 385  */
 386 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 387                                           struct beiscsi_offload_params *params)
 388 {
 389         struct iscsi_conn *conn = beiscsi_conn->conn;
 390         struct iscsi_session *session = conn->session;
 391
 392         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 393                       params, session->max_burst);
 394         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 395                       max_send_data_segment_length, params,
 396                       conn->max_xmit_dlength);
 397         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 398                       params, session->first_burst);
 399         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 400                       session->erl);
 401         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 402                       conn->datadgst_en);
 403         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 404                       conn->hdrdgst_en);
 405         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 406                       session->initial_r2t_en);
 407         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 408                       session->imm_data_en);
 409         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 410                       (conn->exp_statsn - 1));
 411 }
 412
 413 /**
 414  * beiscsi_conn_start - offload of session to chip
 415  * @cls_conn: pointer to beiscsi_conn
 416  */
 417 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 418 {
 419         struct iscsi_conn *conn = cls_conn->dd_data;
 420         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 421         struct beiscsi_endpoint *beiscsi_ep;
 422         struct beiscsi_offload_params params;
 423
 424         SE_DEBUG(DBG_LVL_8, "In beiscsi_conn_start\n");
 425         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 426         beiscsi_ep = beiscsi_conn->ep;
 427         if (!beiscsi_ep)
 428                 SE_DEBUG(DBG_LVL_1, "In beiscsi_conn_start , no beiscsi_ep\n");
 429
 430         beiscsi_conn->login_in_progress = 0;
 431         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 432         beiscsi_offload_connection(beiscsi_conn, &params);
 433         iscsi_conn_start(cls_conn);
 434         return 0;
 435 }
 436
 437 /**
 438  * beiscsi_get_cid - Allocate a cid
 439  * @phba: The phba instance
 440  */
 441 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 442 {
 443         unsigned short cid = 0xFFFF;
 444
 445         if (!phba->avlbl_cids)
 446                 return cid;
 447
 448         cid = phba->cid_array[phba->cid_alloc++];
 449         if (phba->cid_alloc == phba->params.cxns_per_ctrl)
 450                 phba->cid_alloc = 0;
 451         phba->avlbl_cids--;
 452         return cid;
 453 }
 454
 455 /**
 456  * beiscsi_put_cid - Free the cid
 457  * @phba: The phba for which the cid is being freed
 458  * @cid: The cid to free
 459  */
 460 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 461 {
 462         phba->avlbl_cids++;
 463         phba->cid_array[phba->cid_free++] = cid;
 464         if (phba->cid_free == phba->params.cxns_per_ctrl)
 465                 phba->cid_free = 0;
 466 }
 467
 468 /**
 469  * beiscsi_free_ep - free endpoint
 470  * @ep: pointer to iscsi endpoint structure
 471  */
 472 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
 473 {
 474         struct beiscsi_hba *phba = beiscsi_ep->phba;
 475
 476         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 477         beiscsi_ep->phba = NULL;
 478 }
 479
 480 /**
 481  * beiscsi_open_conn - Ask FW to open a TCP connection
 482  * @ep: endpoint to be used
 483  * @src_addr: The source IP address
 484  * @dst_addr: The Destination  IP address
 485  *
 486  * Asks the FW to open a TCP connection
 487  */
 488 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
 489                              struct sockaddr *src_addr,
 490                              struct sockaddr *dst_addr, int non_blocking)
 491 {
 492         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 493         struct beiscsi_hba *phba = beiscsi_ep->phba;
 494         struct be_queue_info *mccq = &phba->ctrl.mcc_obj.q;
 495         struct be_mcc_wrb *wrb;
 496         struct tcp_connect_and_offload_out *ptcpcnct_out;
 497         unsigned short status, extd_status;
 498         struct be_dma_mem nonemb_cmd;
 499         unsigned int tag, wrb_num;
 500         int ret = -ENOMEM;
 501
 502         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn\n");
 503         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
 504         if (beiscsi_ep->ep_cid == 0xFFFF) {
 505                 SE_DEBUG(DBG_LVL_1, "No free cid available\n");
 506                 return ret;
 507         }
 508         SE_DEBUG(DBG_LVL_8, "In beiscsi_open_conn, ep_cid=%d\n",
 509                  beiscsi_ep->ep_cid);
 510         phba->ep_array[beiscsi_ep->ep_cid -
 511                        phba->fw_config.iscsi_cid_start] = ep;
 512         if (beiscsi_ep->ep_cid > (phba->fw_config.iscsi_cid_start +
 513                                   phba->params.cxns_per_ctrl * 2)) {
 514                 SE_DEBUG(DBG_LVL_1, "Failed in allocate iscsi cid\n");
 515                 goto free_ep;
 516         }
 517
 518         beiscsi_ep->cid_vld = 0;
 519         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
 520                                 sizeof(struct tcp_connect_and_offload_in),
 521                                 &nonemb_cmd.dma);
 522         if (nonemb_cmd.va == NULL) {
 523                 SE_DEBUG(DBG_LVL_1,
 524                          "Failed to allocate memory for mgmt_open_connection"
 525                          "\n");
 526                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 527                 return -ENOMEM;
 528         }
 529         nonemb_cmd.size = sizeof(struct tcp_connect_and_offload_in);
 530         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
 531         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
 532         if (!tag) {
 533                 SE_DEBUG(DBG_LVL_1,
 534                          "mgmt_open_connection Failed for cid=%d\n",
 535                          beiscsi_ep->ep_cid);
 536                 beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
 537                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 538                                     nonemb_cmd.va, nonemb_cmd.dma);
 539                 return -EAGAIN;
 540         } else {
 541                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 542                                          phba->ctrl.mcc_numtag[tag]);
 543         }
 544         wrb_num = (phba->ctrl.mcc_numtag[tag] & 0x00FF0000) >> 16;
 545         extd_status = (phba->ctrl.mcc_numtag[tag] & 0x0000FF00) >> 8;
 546         status = phba->ctrl.mcc_numtag[tag] & 0x000000FF;
 547         if (status || extd_status) {
 548                 SE_DEBUG(DBG_LVL_1, "mgmt_open_connection Failed"
 549                                     " status = %d extd_status = %d\n",
 550                                     status, extd_status);
 551                 free_mcc_tag(&phba->ctrl, tag);
 552                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 553                             nonemb_cmd.va, nonemb_cmd.dma);
 554                 goto free_ep;
 555         } else {
 556                 wrb = queue_get_wrb(mccq, wrb_num);
 557                 free_mcc_tag(&phba->ctrl, tag);
 558
 559                 ptcpcnct_out = embedded_payload(wrb);
 560                 beiscsi_ep = ep->dd_data;
 561                 beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
 562                 beiscsi_ep->cid_vld = 1;
 563                 SE_DEBUG(DBG_LVL_8, "mgmt_open_connection Success\n");
 564         }
 565         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
 566                             nonemb_cmd.va, nonemb_cmd.dma);
 567         return 0;
 568
 569 free_ep:
 570         beiscsi_free_ep(beiscsi_ep);
 571         return -EBUSY;
 572 }
 573
 574 /**
 575  * beiscsi_ep_connect - Ask chip to create TCP Conn
 576  * @scsi_host: Pointer to scsi_host structure
 577  * @dst_addr: The IP address of Target
 578  * @non_blocking: blocking or non-blocking call
 579  *
 580  * This routines first asks chip to create a connection and then allocates an EP
 581  */
 582 struct iscsi_endpoint *
 583 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
 584                    int non_blocking)
 585 {
 586         struct beiscsi_hba *phba;
 587         struct beiscsi_endpoint *beiscsi_ep;
 588         struct iscsi_endpoint *ep;
 589         int ret;
 590
 591         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_connect\n");
 592         if (shost)
 593                 phba = iscsi_host_priv(shost);
 594         else {
 595                 ret = -ENXIO;
 596                 SE_DEBUG(DBG_LVL_1, "shost is NULL\n");
 597                 return ERR_PTR(ret);
 598         }
 599
 600         if (phba->state != BE_ADAPTER_UP) {
 601                 ret = -EBUSY;
 602                 SE_DEBUG(DBG_LVL_1, "The Adapter state is Not UP\n");
 603                 return ERR_PTR(ret);
 604         }
 605
 606         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
 607         if (!ep) {
 608                 ret = -ENOMEM;
 609                 return ERR_PTR(ret);
 610         }
 611
 612         beiscsi_ep = ep->dd_data;
 613         beiscsi_ep->phba = phba;
 614         beiscsi_ep->openiscsi_ep = ep;
 615         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
 616         if (ret) {
 617                 SE_DEBUG(DBG_LVL_1, "Failed in beiscsi_open_conn\n");
 618                 goto free_ep;
 619         }
 620
 621         return ep;
 622
 623 free_ep:
 624         iscsi_destroy_endpoint(ep);
 625         return ERR_PTR(ret);
 626 }
 627
 628 /**
 629  * beiscsi_ep_poll - Poll to see if connection is established
 630  * @ep: endpoint to be used
 631  * @timeout_ms: timeout specified in millisecs
 632  *
 633  * Poll to see if TCP connection established
 634  */
 635 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
 636 {
 637         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 638
 639         SE_DEBUG(DBG_LVL_8, "In  beiscsi_ep_poll\n");
 640         if (beiscsi_ep->cid_vld == 1)
 641                 return 1;
 642         else
 643                 return 0;
 644 }
 645
 646 /**
 647  * beiscsi_close_conn - Upload the  connection
 648  * @ep: The iscsi endpoint
 649  * @flag: The type of connection closure
 650  */
 651 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
 652 {
 653         int ret = 0;
 654         unsigned int tag;
 655         struct beiscsi_hba *phba = beiscsi_ep->phba;
 656
 657         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
 658         if (!tag) {
 659                 SE_DEBUG(DBG_LVL_8, "upload failed for cid 0x%x\n",
 660                          beiscsi_ep->ep_cid);
 661                 ret = -EAGAIN;
 662         } else {
 663                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 664                                          phba->ctrl.mcc_numtag[tag]);
 665                 free_mcc_tag(&phba->ctrl, tag);
 666         }
 667         return ret;
 668 }
 669
 670 /**
 671  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
 672  * @phba: The phba instance
 673  * @cid: The cid to free
 674  */
 675 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
 676                                       unsigned int cid)
 677 {
 678         if (phba->conn_table[cid])
 679                 phba->conn_table[cid] = NULL;
 680         else {
 681                 SE_DEBUG(DBG_LVL_8, "Connection table Not occupied.\n");
 682                 return -EINVAL;
 683         }
 684         return 0;
 685 }
 686
 687 /**
 688  * beiscsi_ep_disconnect - Tears down the TCP connection
 689  * @ep: endpoint to be used
 690  *
 691  * Tears down the TCP connection
 692  */
 693 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
 694 {
 695         struct beiscsi_conn *beiscsi_conn;
 696         struct beiscsi_endpoint *beiscsi_ep;
 697         struct beiscsi_hba *phba;
 698         unsigned int tag;
 699         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
 700
 701         beiscsi_ep = ep->dd_data;
 702         phba = beiscsi_ep->phba;
 703         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect for ep_cid = %d\n",
 704                              beiscsi_ep->ep_cid);
 705
 706         if (!beiscsi_ep->conn) {
 707                 SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect, no "
 708                          "beiscsi_ep\n");
 709                 return;
 710         }
 711         beiscsi_conn = beiscsi_ep->conn;
 712         iscsi_suspend_queue(beiscsi_conn->conn);
 713
 714         SE_DEBUG(DBG_LVL_8, "In beiscsi_ep_disconnect ep_cid = %d\n",
 715                  beiscsi_ep->ep_cid);
 716
 717         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
 718                                             beiscsi_ep->ep_cid, 1,
 719                                             savecfg_flag);
 720         if (!tag) {
 721                 SE_DEBUG(DBG_LVL_1,
 722                          "mgmt_invalidate_connection Failed for cid=%d\n",
 723                           beiscsi_ep->ep_cid);
 724         } else {
 725                 wait_event_interruptible(phba->ctrl.mcc_wait[tag],
 726                                          phba->ctrl.mcc_numtag[tag]);
 727                 free_mcc_tag(&phba->ctrl, tag);
 728         }
 729
 730         beiscsi_close_conn(beiscsi_ep, CONNECTION_UPLOAD_GRACEFUL);
 731         beiscsi_free_ep(beiscsi_ep);
 732         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
 733         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
 734 }
 735
 736 mode_t be2iscsi_attr_is_visible(int param_type, int param)
 737 {
 738         switch (param_type) {
 739         case ISCSI_HOST_PARAM:
 740                 switch (param) {
 741                 case ISCSI_HOST_PARAM_HWADDRESS:
 742                 case ISCSI_HOST_PARAM_IPADDRESS:
 743                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
 744                         return S_IRUGO;
 745                 default:
 746                         return 0;
 747                 }
 748         case ISCSI_PARAM:
 749                 switch (param) {
 750                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
 751                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 752                 case ISCSI_PARAM_HDRDGST_EN:
 753                 case ISCSI_PARAM_DATADGST_EN:
 754                 case ISCSI_PARAM_CONN_ADDRESS:
 755                 case ISCSI_PARAM_CONN_PORT:
 756                 case ISCSI_PARAM_EXP_STATSN:
 757                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
 758                 case ISCSI_PARAM_PERSISTENT_PORT:
 759                 case ISCSI_PARAM_PING_TMO:
 760                 case ISCSI_PARAM_RECV_TMO:
 761                 case ISCSI_PARAM_INITIAL_R2T_EN:
 762                 case ISCSI_PARAM_MAX_R2T:
 763                 case ISCSI_PARAM_IMM_DATA_EN:
 764                 case ISCSI_PARAM_FIRST_BURST:
 765                 case ISCSI_PARAM_MAX_BURST:
 766                 case ISCSI_PARAM_PDU_INORDER_EN:
 767                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
 768                 case ISCSI_PARAM_ERL:
 769                 case ISCSI_PARAM_TARGET_NAME:
 770                 case ISCSI_PARAM_TPGT:
 771                 case ISCSI_PARAM_USERNAME:
 772                 case ISCSI_PARAM_PASSWORD:
 773                 case ISCSI_PARAM_USERNAME_IN:
 774                 case ISCSI_PARAM_PASSWORD_IN:
 775                 case ISCSI_PARAM_FAST_ABORT:
 776                 case ISCSI_PARAM_ABORT_TMO:
 777                 case ISCSI_PARAM_LU_RESET_TMO:
 778                 case ISCSI_PARAM_IFACE_NAME:
 779                 case ISCSI_PARAM_INITIATOR_NAME:
 780                         return S_IRUGO;
 781                 default:
 782                         return 0;
 783                 }
 784         }
 785
 786         return 0;
 787 }