drivers/scsi/be2iscsi/be_iscsi.c

   1 /**
   2  * Copyright (C) 2005 - 2015 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@avagotech.com)
  11  *
  12  * Contact Information:
  13  * linux-drivers@avagotech.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_netlink.h>
  27 #include <net/netlink.h>
  28 #include <scsi/scsi.h>
  29
  30 #include "be_iscsi.h"
  31
  32 extern struct iscsi_transport beiscsi_iscsi_transport;
  33
  34 /**
  35  * beiscsi_session_create - creates a new iscsi session
  36  * @cmds_max: max commands supported
  37  * @qdepth: max queue depth supported
  38  * @initial_cmdsn: initial iscsi CMDSN
  39  */
  40 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  41                                                  u16 cmds_max,
  42                                                  u16 qdepth,
  43                                                  u32 initial_cmdsn)
  44 {
  45         struct Scsi_Host *shost;
  46         struct beiscsi_endpoint *beiscsi_ep;
  47         struct iscsi_cls_session *cls_session;
  48         struct beiscsi_hba *phba;
  49         struct iscsi_session *sess;
  50         struct beiscsi_session *beiscsi_sess;
  51         struct beiscsi_io_task *io_task;
  52
  53
  54         if (!ep) {
  55                 pr_err("beiscsi_session_create: invalid ep\n");
  56                 return NULL;
  57         }
  58         beiscsi_ep = ep->dd_data;
  59         phba = beiscsi_ep->phba;
  60
  61         if (beiscsi_hba_in_error(phba)) {
  62                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  63                             "BS_%d : HBA in error 0x%lx\n", phba->state);
  64                 return NULL;
  65         }
  66
  67         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  68                     "BS_%d : In beiscsi_session_create\n");
  69         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  70                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  71                             "BS_%d : Cannot handle %d cmds."
  72                             "Max cmds per session supported is %d. Using %d."
  73                             "\n", cmds_max,
  74                             beiscsi_ep->phba->params.wrbs_per_cxn,
  75                             beiscsi_ep->phba->params.wrbs_per_cxn);
  76
  77                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  78         }
  79
  80         shost = phba->shost;
  81         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  82                                           shost, cmds_max,
  83                                           sizeof(*beiscsi_sess),
  84                                           sizeof(*io_task),
  85                                           initial_cmdsn, ISCSI_MAX_TARGET);
  86         if (!cls_session)
  87                 return NULL;
  88         sess = cls_session->dd_data;
  89         beiscsi_sess = sess->dd_data;
  90         beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
  91                                                    phba->pcidev,
  92                                                    sizeof(struct be_cmd_bhs),
  93                                                    64, 0);
  94         if (!beiscsi_sess->bhs_pool)
  95                 goto destroy_sess;
  96
  97         return cls_session;
  98 destroy_sess:
  99         iscsi_session_teardown(cls_session);
 100         return NULL;
 101 }
 102
 103 /**
 104  * beiscsi_session_destroy - destroys iscsi session
 105  * @cls_session:        pointer to iscsi cls session
 106  *
 107  * Destroys iSCSI session instance and releases
 108  * resources allocated for it.
 109  */
 110 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 111 {
 112         struct iscsi_session *sess = cls_session->dd_data;
 113         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 114
 115         printk(KERN_INFO "In beiscsi_session_destroy\n");
 116         pci_pool_destroy(beiscsi_sess->bhs_pool);
 117         iscsi_session_teardown(cls_session);
 118 }
 119
 120 /**
 121  * beiscsi_conn_create - create an instance of iscsi connection
 122  * @cls_session: ptr to iscsi_cls_session
 123  * @cid: iscsi cid
 124  */
 125 struct iscsi_cls_conn *
 126 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 127 {
 128         struct beiscsi_hba *phba;
 129         struct Scsi_Host *shost;
 130         struct iscsi_cls_conn *cls_conn;
 131         struct beiscsi_conn *beiscsi_conn;
 132         struct iscsi_conn *conn;
 133         struct iscsi_session *sess;
 134         struct beiscsi_session *beiscsi_sess;
 135
 136         shost = iscsi_session_to_shost(cls_session);
 137         phba = iscsi_host_priv(shost);
 138
 139         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 140                     "BS_%d : In beiscsi_conn_create ,cid"
 141                     "from iscsi layer=%d\n", cid);
 142
 143         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 144         if (!cls_conn)
 145                 return NULL;
 146
 147         conn = cls_conn->dd_data;
 148         beiscsi_conn = conn->dd_data;
 149         beiscsi_conn->ep = NULL;
 150         beiscsi_conn->phba = phba;
 151         beiscsi_conn->conn = conn;
 152         sess = cls_session->dd_data;
 153         beiscsi_sess = sess->dd_data;
 154         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 155         return cls_conn;
 156 }
 157
 158 /**
 159  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 160  * @beiscsi_conn: The pointer to  beiscsi_conn structure
 161  * @phba: The phba instance
 162  * @cid: The cid to free
 163  */
 164 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 165                                 struct beiscsi_conn *beiscsi_conn,
 166                                 unsigned int cid)
 167 {
 168         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
 169
 170         if (phba->conn_table[cri_index]) {
 171                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 172                             "BS_%d : Connection table already occupied. Detected clash\n");
 173
 174                 return -EINVAL;
 175         } else {
 176                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 177                             "BS_%d : phba->conn_table[%d]=%p(beiscsi_conn)\n",
 178                             cri_index, beiscsi_conn);
 179
 180                 phba->conn_table[cri_index] = beiscsi_conn;
 181         }
 182         return 0;
 183 }
 184
 185 /**
 186  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 187  * @cls_session: pointer to iscsi cls session
 188  * @cls_conn: pointer to iscsi cls conn
 189  * @transport_fd: EP handle(64 bit)
 190  *
 191  * This function binds the TCP Conn with iSCSI Connection and Session.
 192  */
 193 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 194                       struct iscsi_cls_conn *cls_conn,
 195                       u64 transport_fd, int is_leading)
 196 {
 197         struct iscsi_conn *conn = cls_conn->dd_data;
 198         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 199         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
 200         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 201         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
 202         struct hwi_wrb_context *pwrb_context;
 203         struct beiscsi_endpoint *beiscsi_ep;
 204         struct iscsi_endpoint *ep;
 205
 206         ep = iscsi_lookup_endpoint(transport_fd);
 207         if (!ep)
 208                 return -EINVAL;
 209
 210         beiscsi_ep = ep->dd_data;
 211
 212         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 213                 return -EINVAL;
 214
 215         if (beiscsi_ep->phba != phba) {
 216                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 217                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
 218                             beiscsi_ep->phba, phba);
 219
 220                 return -EEXIST;
 221         }
 222
 223         pwrb_context = &phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(
 224                                                 beiscsi_ep->ep_cid)];
 225
 226         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 227         beiscsi_conn->ep = beiscsi_ep;
 228         beiscsi_ep->conn = beiscsi_conn;
 229         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
 230
 231         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 232                     "BS_%d : beiscsi_conn=%p conn=%p ep_cid=%d\n",
 233                     beiscsi_conn, conn, beiscsi_ep->ep_cid);
 234
 235         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 236 }
 237
 238 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
 239 {
 240         if (phba->ipv4_iface)
 241                 return 0;
 242
 243         phba->ipv4_iface = iscsi_create_iface(phba->shost,
 244                                               &beiscsi_iscsi_transport,
 245                                               ISCSI_IFACE_TYPE_IPV4,
 246                                               0, 0);
 247         if (!phba->ipv4_iface) {
 248                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 249                             "BS_%d : Could not "
 250                             "create default IPv4 address.\n");
 251                 return -ENODEV;
 252         }
 253
 254         return 0;
 255 }
 256
 257 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
 258 {
 259         if (phba->ipv6_iface)
 260                 return 0;
 261
 262         phba->ipv6_iface = iscsi_create_iface(phba->shost,
 263                                               &beiscsi_iscsi_transport,
 264                                               ISCSI_IFACE_TYPE_IPV6,
 265                                               0, 0);
 266         if (!phba->ipv6_iface) {
 267                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 268                             "BS_%d : Could not "
 269                             "create default IPv6 address.\n");
 270                 return -ENODEV;
 271         }
 272
 273         return 0;
 274 }
 275
 276 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 277 {
 278         struct be_cmd_get_if_info_resp *if_info;
 279
 280         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 281                 beiscsi_iface_create_ipv4(phba);
 282                 kfree(if_info);
 283         }
 284
 285         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 286                 beiscsi_iface_create_ipv6(phba);
 287                 kfree(if_info);
 288         }
 289 }
 290
 291 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
 292 {
 293         if (phba->ipv6_iface) {
 294                 iscsi_destroy_iface(phba->ipv6_iface);
 295                 phba->ipv6_iface = NULL;
 296         }
 297         if (phba->ipv4_iface) {
 298                 iscsi_destroy_iface(phba->ipv4_iface);
 299                 phba->ipv4_iface = NULL;
 300         }
 301 }
 302
 303 /**
 304  * beiscsi_set_vlan_tag()- Set the VLAN TAG
 305  * @shost: Scsi Host for the driver instance
 306  * @iface_param: Interface paramters
 307  *
 308  * Set the VLAN TAG for the adapter or disable
 309  * the VLAN config
 310  *
 311  * returns
 312  *      Success: 0
 313  *      Failure: Non-Zero Value
 314  **/
 315 static int
 316 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
 317                           struct iscsi_iface_param_info *iface_param)
 318 {
 319         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 320         int ret = -EPERM;
 321
 322         switch (iface_param->param) {
 323         case ISCSI_NET_PARAM_VLAN_ENABLED:
 324                 ret = 0;
 325                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
 326                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
 327                 break;
 328         case ISCSI_NET_PARAM_VLAN_TAG:
 329                 ret = beiscsi_if_set_vlan(phba,
 330                                           *((uint16_t *)iface_param->value));
 331                 break;
 332         }
 333         return ret;
 334 }
 335
 336
 337 static int
 338 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 339                           struct iscsi_iface_param_info *info,
 340                           void *data, uint32_t dt_len)
 341 {
 342         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 343         u8 *ip = NULL, *subnet = NULL, *gw;
 344         struct nlattr *nla;
 345         int ret = -EPERM;
 346
 347         /* Check the param */
 348         switch (info->param) {
 349         case ISCSI_NET_PARAM_IFACE_ENABLE:
 350                 if (info->value[0] == ISCSI_IFACE_ENABLE)
 351                         ret = beiscsi_iface_create_ipv4(phba);
 352                 else {
 353                         iscsi_destroy_iface(phba->ipv4_iface);
 354                         phba->ipv4_iface = NULL;
 355                 }
 356                 break;
 357         case ISCSI_NET_PARAM_IPV4_GW:
 358                 gw = info->value;
 359                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 360                 break;
 361         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 362                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
 363                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 364                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 365                         /* release DHCP IP address */
 366                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 367                                                    NULL, NULL);
 368                 else
 369                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 370                                     "BS_%d : Invalid BOOTPROTO: %d\n",
 371                                     info->value[0]);
 372                 break;
 373         case ISCSI_NET_PARAM_IPV4_ADDR:
 374                 ip = info->value;
 375                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
 376                 if (nla) {
 377                         info = nla_data(nla);
 378                         subnet = info->value;
 379                 }
 380                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 381                                            ip, subnet);
 382                 break;
 383         case ISCSI_NET_PARAM_IPV4_SUBNET:
 384                 /*
 385                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
 386                  * and subnet both. Find IP to be applied for this subnet.
 387                  */
 388                 subnet = info->value;
 389                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
 390                 if (nla) {
 391                         info = nla_data(nla);
 392                         ip = info->value;
 393                 }
 394                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 395                                            ip, subnet);
 396                 break;
 397         }
 398
 399         return ret;
 400 }
 401
 402 static int
 403 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 404                           struct iscsi_iface_param_info *iface_param,
 405                           void *data, uint32_t dt_len)
 406 {
 407         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 408         int ret = -EPERM;
 409
 410         switch (iface_param->param) {
 411         case ISCSI_NET_PARAM_IFACE_ENABLE:
 412                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
 413                         ret = beiscsi_iface_create_ipv6(phba);
 414                 else {
 415                         iscsi_destroy_iface(phba->ipv6_iface);
 416                         phba->ipv6_iface = NULL;
 417                 }
 418                 break;
 419         case ISCSI_NET_PARAM_IPV6_ADDR:
 420                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 421                                            iface_param->value, NULL);
 422                 break;
 423         }
 424
 425         return ret;
 426 }
 427
 428 int beiscsi_iface_set_param(struct Scsi_Host *shost,
 429                             void *data, uint32_t dt_len)
 430 {
 431         struct iscsi_iface_param_info *iface_param = NULL;
 432         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 433         struct nlattr *attrib;
 434         uint32_t rm_len = dt_len;
 435         int ret;
 436
 437         if (beiscsi_hba_in_error(phba)) {
 438                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 439                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 440                 return -EBUSY;
 441         }
 442
 443         /* update interface_handle */
 444         ret = beiscsi_if_get_handle(phba);
 445         if (ret) {
 446                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 447                             "BS_%d : Getting Interface Handle Failed\n");
 448                 return ret;
 449         }
 450
 451         nla_for_each_attr(attrib, data, dt_len, rm_len) {
 452                 iface_param = nla_data(attrib);
 453
 454                 if (iface_param->param_type != ISCSI_NET_PARAM)
 455                         continue;
 456
 457                 /*
 458                  * BE2ISCSI only supports 1 interface
 459                  */
 460                 if (iface_param->iface_num) {
 461                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 462                                     "BS_%d : Invalid iface_num %d."
 463                                     "Only iface_num 0 is supported.\n",
 464                                     iface_param->iface_num);
 465
 466                         return -EINVAL;
 467                 }
 468
 469                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 470                             "BS_%d : %s.0 set param %d",
 471                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 472                             "ipv4" : "ipv6", iface_param->param);
 473
 474                 ret = -EPERM;
 475                 switch (iface_param->param) {
 476                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 477                 case ISCSI_NET_PARAM_VLAN_TAG:
 478                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 479                         break;
 480                 default:
 481                         switch (iface_param->iface_type) {
 482                         case ISCSI_IFACE_TYPE_IPV4:
 483                                 ret = beiscsi_iface_config_ipv4(shost,
 484                                                                 iface_param,
 485                                                                 data, dt_len);
 486                                 break;
 487                         case ISCSI_IFACE_TYPE_IPV6:
 488                                 ret = beiscsi_iface_config_ipv6(shost,
 489                                                                 iface_param,
 490                                                                 data, dt_len);
 491                                 break;
 492                         }
 493                 }
 494
 495                 if (ret == -EPERM) {
 496                         __beiscsi_log(phba, KERN_ERR,
 497                                       "BS_%d : %s.0 set param %d not permitted",
 498                                       (iface_param->iface_type ==
 499                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 500                                       iface_param->param);
 501                         ret = 0;
 502                 }
 503                 if (ret)
 504                         break;
 505         }
 506
 507         return ret;
 508 }
 509
 510 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 511                                      struct iscsi_iface *iface,
 512                                      int param, char *buf)
 513 {
 514         struct be_cmd_get_if_info_resp *if_info;
 515         int len, ip_type = BEISCSI_IP_TYPE_V4;
 516
 517         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 518                 ip_type = BEISCSI_IP_TYPE_V6;
 519
 520         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 521         if (len)
 522                 return len;
 523
 524         switch (param) {
 525         case ISCSI_NET_PARAM_IPV4_ADDR:
 526                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 527                 break;
 528         case ISCSI_NET_PARAM_IPV6_ADDR:
 529                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 530                 break;
 531         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 532                 if (!if_info->dhcp_state)
 533                         len = sprintf(buf, "static\n");
 534                 else
 535                         len = sprintf(buf, "dhcp\n");
 536                 break;
 537         case ISCSI_NET_PARAM_IPV4_SUBNET:
 538                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 539                 break;
 540         case ISCSI_NET_PARAM_VLAN_ENABLED:
 541                 len = sprintf(buf, "%s\n",
 542                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 543                               "disable" : "enable");
 544                 break;
 545         case ISCSI_NET_PARAM_VLAN_ID:
 546                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 547                         len = -EINVAL;
 548                 else
 549                         len = sprintf(buf, "%d\n",
 550                                       (if_info->vlan_priority &
 551                                        ISCSI_MAX_VLAN_ID));
 552                 break;
 553         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 554                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 555                         len = -EINVAL;
 556                 else
 557                         len = sprintf(buf, "%d\n",
 558                                       ((if_info->vlan_priority >> 13) &
 559                                        ISCSI_MAX_VLAN_PRIORITY));
 560                 break;
 561         default:
 562                 WARN_ON(1);
 563         }
 564
 565         kfree(if_info);
 566         return len;
 567 }
 568
 569 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 570                             enum iscsi_param_type param_type,
 571                             int param, char *buf)
 572 {
 573         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 574         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 575         struct be_cmd_get_def_gateway_resp gateway;
 576         int len = -EPERM;
 577
 578         if (param_type != ISCSI_NET_PARAM)
 579                 return 0;
 580         if (beiscsi_hba_in_error(phba)) {
 581                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 582                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 583                 return -EBUSY;
 584         }
 585
 586         switch (param) {
 587         case ISCSI_NET_PARAM_IPV4_ADDR:
 588         case ISCSI_NET_PARAM_IPV4_SUBNET:
 589         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 590         case ISCSI_NET_PARAM_IPV6_ADDR:
 591         case ISCSI_NET_PARAM_VLAN_ENABLED:
 592         case ISCSI_NET_PARAM_VLAN_ID:
 593         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 594                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 595                 break;
 596         case ISCSI_NET_PARAM_IFACE_ENABLE:
 597                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 598                         len = sprintf(buf, "%s\n",
 599                                       phba->ipv4_iface ? "enable" : "disable");
 600                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 601                         len = sprintf(buf, "%s\n",
 602                                       phba->ipv6_iface ? "enable" : "disable");
 603                 break;
 604         case ISCSI_NET_PARAM_IPV4_GW:
 605                 memset(&gateway, 0, sizeof(gateway));
 606                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 607                 if (!len)
 608                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 609                 break;
 610         }
 611
 612         return len;
 613 }
 614
 615 /**
 616  * beiscsi_ep_get_param - get the iscsi parameter
 617  * @ep: pointer to iscsi ep
 618  * @param: parameter type identifier
 619  * @buf: buffer pointer
 620  *
 621  * returns iscsi parameter
 622  */
 623 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 624                            enum iscsi_param param, char *buf)
 625 {
 626         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 627         int len;
 628
 629         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 630                     BEISCSI_LOG_CONFIG,
 631                     "BS_%d : In beiscsi_ep_get_param,"
 632                     " param= %d\n", param);
 633
 634         switch (param) {
 635         case ISCSI_PARAM_CONN_PORT:
 636                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 637                 break;
 638         case ISCSI_PARAM_CONN_ADDRESS:
 639                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 640                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 641                 else
 642                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 643                 break;
 644         default:
 645                 len = -EPERM;
 646         }
 647         return len;
 648 }
 649
 650 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 651                       enum iscsi_param param, char *buf, int buflen)
 652 {
 653         struct iscsi_conn *conn = cls_conn->dd_data;
 654         struct iscsi_session *session = conn->session;
 655         struct beiscsi_hba *phba = NULL;
 656         int ret;
 657
 658         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 659         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 660                     "BS_%d : In beiscsi_conn_set_param,"
 661                     " param= %d\n", param);
 662
 663         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 664         if (ret)
 665                 return ret;
 666         /*
 667          * If userspace tried to set the value to higher than we can
 668          * support override here.
 669          */
 670         switch (param) {
 671         case ISCSI_PARAM_FIRST_BURST:
 672                 if (session->first_burst > 8192)
 673                         session->first_burst = 8192;
 674                 break;
 675         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 676                 if (conn->max_recv_dlength > 65536)
 677                         conn->max_recv_dlength = 65536;
 678                 break;
 679         case ISCSI_PARAM_MAX_BURST:
 680                 if (session->max_burst > 262144)
 681                         session->max_burst = 262144;
 682                 break;
 683         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 684                 if (conn->max_xmit_dlength > 65536)
 685                         conn->max_xmit_dlength = 65536;
 686         default:
 687                 return 0;
 688         }
 689
 690         return 0;
 691 }
 692
 693 /**
 694  * beiscsi_get_initname - Read Initiator Name from flash
 695  * @buf: buffer bointer
 696  * @phba: The device priv structure instance
 697  *
 698  * returns number of bytes
 699  */
 700 static int beiscsi_get_initname(char *buf, struct beiscsi_hba *phba)
 701 {
 702         int rc;
 703         unsigned int tag;
 704         struct be_mcc_wrb *wrb;
 705         struct be_cmd_hba_name *resp;
 706
 707         tag = be_cmd_get_initname(phba);
 708         if (!tag) {
 709                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 710                             "BS_%d : Getting Initiator Name Failed\n");
 711
 712                 return -EBUSY;
 713         }
 714
 715         rc = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
 716         if (rc) {
 717                 beiscsi_log(phba, KERN_ERR,
 718                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
 719                             "BS_%d : Initiator Name MBX Failed\n");
 720                 return rc;
 721         }
 722
 723         resp = embedded_payload(wrb);
 724         rc = sprintf(buf, "%s\n", resp->initiator_name);
 725         return rc;
 726 }
 727
 728 /**
 729  * beiscsi_get_port_state - Get the Port State
 730  * @shost : pointer to scsi_host structure
 731  *
 732  */
 733 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 734 {
 735         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 736         struct iscsi_cls_host *ihost = shost->shost_data;
 737
 738         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
 739                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 740 }
 741
 742 /**
 743  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 744  * @shost : pointer to scsi_host structure
 745  *
 746  */
 747 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 748 {
 749         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 750         struct iscsi_cls_host *ihost = shost->shost_data;
 751
 752         switch (phba->port_speed) {
 753         case BE2ISCSI_LINK_SPEED_10MBPS:
 754                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 755                 break;
 756         case BE2ISCSI_LINK_SPEED_100MBPS:
 757                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 758                 break;
 759         case BE2ISCSI_LINK_SPEED_1GBPS:
 760                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 761                 break;
 762         case BE2ISCSI_LINK_SPEED_10GBPS:
 763                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 764                 break;
 765         case BE2ISCSI_LINK_SPEED_25GBPS:
 766                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 767                 break;
 768         case BE2ISCSI_LINK_SPEED_40GBPS:
 769                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 770                 break;
 771         default:
 772                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 773         }
 774 }
 775
 776 /**
 777  * beiscsi_get_host_param - get the iscsi parameter
 778  * @shost: pointer to scsi_host structure
 779  * @param: parameter type identifier
 780  * @buf: buffer pointer
 781  *
 782  * returns host parameter
 783  */
 784 int beiscsi_get_host_param(struct Scsi_Host *shost,
 785                            enum iscsi_host_param param, char *buf)
 786 {
 787         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 788         int status = 0;
 789
 790         if (beiscsi_hba_in_error(phba)) {
 791                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 792                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 793                 return -EBUSY;
 794         }
 795         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 796                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
 797
 798         switch (param) {
 799         case ISCSI_HOST_PARAM_HWADDRESS:
 800                 status = beiscsi_get_macaddr(buf, phba);
 801                 if (status < 0) {
 802                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 803                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 804                         return status;
 805                 }
 806                 break;
 807         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 808                 status = beiscsi_get_initname(buf, phba);
 809                 if (status < 0) {
 810                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 811                                     "BS_%d : Retreiving Initiator Name Failed\n");
 812                         return status;
 813                 }
 814                 break;
 815         case ISCSI_HOST_PARAM_PORT_STATE:
 816                 beiscsi_get_port_state(shost);
 817                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 818                 break;
 819         case ISCSI_HOST_PARAM_PORT_SPEED:
 820                 beiscsi_get_port_speed(shost);
 821                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 822                 break;
 823         default:
 824                 return iscsi_host_get_param(shost, param, buf);
 825         }
 826         return status;
 827 }
 828
 829 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 830 {
 831         struct be_cmd_get_nic_conf_resp resp;
 832         int rc;
 833
 834         if (phba->mac_addr_set)
 835                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 836
 837         memset(&resp, 0, sizeof(resp));
 838         rc = mgmt_get_nic_conf(phba, &resp);
 839         if (rc)
 840                 return rc;
 841
 842         phba->mac_addr_set = true;
 843         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 844         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 845 }
 846
 847 /**
 848  * beiscsi_conn_get_stats - get the iscsi stats
 849  * @cls_conn: pointer to iscsi cls conn
 850  * @stats: pointer to iscsi_stats structure
 851  *
 852  * returns iscsi stats
 853  */
 854 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 855                             struct iscsi_stats *stats)
 856 {
 857         struct iscsi_conn *conn = cls_conn->dd_data;
 858         struct beiscsi_hba *phba = NULL;
 859
 860         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 861         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 862                     "BS_%d : In beiscsi_conn_get_stats\n");
 863
 864         stats->txdata_octets = conn->txdata_octets;
 865         stats->rxdata_octets = conn->rxdata_octets;
 866         stats->dataout_pdus = conn->dataout_pdus_cnt;
 867         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 868         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 869         stats->datain_pdus = conn->datain_pdus_cnt;
 870         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 871         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 872         stats->r2t_pdus = conn->r2t_pdus_cnt;
 873         stats->digest_err = 0;
 874         stats->timeout_err = 0;
 875         stats->custom_length = 1;
 876         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 877         stats->custom[0].value = conn->eh_abort_cnt;
 878 }
 879
 880 /**
 881  * beiscsi_set_params_for_offld - get the parameters for offload
 882  * @beiscsi_conn: pointer to beiscsi_conn
 883  * @params: pointer to offload_params structure
 884  */
 885 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 886                                           struct beiscsi_offload_params *params)
 887 {
 888         struct iscsi_conn *conn = beiscsi_conn->conn;
 889         struct iscsi_session *session = conn->session;
 890
 891         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 892                       params, session->max_burst);
 893         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 894                       max_send_data_segment_length, params,
 895                       conn->max_xmit_dlength);
 896         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 897                       params, session->first_burst);
 898         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 899                       session->erl);
 900         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 901                       conn->datadgst_en);
 902         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 903                       conn->hdrdgst_en);
 904         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 905                       session->initial_r2t_en);
 906         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 907                       session->imm_data_en);
 908         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 909                       data_seq_inorder, params,
 910                       session->dataseq_inorder_en);
 911         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 912                       pdu_seq_inorder, params,
 913                       session->pdu_inorder_en);
 914         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 915                       session->max_r2t);
 916         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 917                       (conn->exp_statsn - 1));
 918         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 919                       max_recv_data_segment_length, params,
 920                       conn->max_recv_dlength);
 921
 922 }
 923
 924 /**
 925  * beiscsi_conn_start - offload of session to chip
 926  * @cls_conn: pointer to beiscsi_conn
 927  */
 928 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 929 {
 930         struct iscsi_conn *conn = cls_conn->dd_data;
 931         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 932         struct beiscsi_endpoint *beiscsi_ep;
 933         struct beiscsi_offload_params params;
 934         struct beiscsi_hba *phba;
 935
 936         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 937
 938         if (beiscsi_hba_in_error(phba)) {
 939                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 940                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 941                 return -EBUSY;
 942         }
 943         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 944                     "BS_%d : In beiscsi_conn_start\n");
 945
 946         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 947         beiscsi_ep = beiscsi_conn->ep;
 948         if (!beiscsi_ep)
 949                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 950                             BEISCSI_LOG_CONFIG,
 951                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 952
 953         beiscsi_conn->login_in_progress = 0;
 954         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 955         beiscsi_offload_connection(beiscsi_conn, &params);
 956         iscsi_conn_start(cls_conn);
 957         return 0;
 958 }
 959
 960 /**
 961  * beiscsi_get_cid - Allocate a cid
 962  * @phba: The phba instance
 963  */
 964 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 965 {
 966         unsigned short cid = 0xFFFF, cid_from_ulp;
 967         struct ulp_cid_info *cid_info = NULL;
 968         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 969
 970         /* Find the ULP which has more CID available */
 971         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 972                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 973         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 974                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 975         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 976                         BEISCSI_ULP0 : BEISCSI_ULP1;
 977
 978         if (test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) {
 979                 cid_info = phba->cid_array_info[cid_from_ulp];
 980                 if (!cid_info->avlbl_cids)
 981                         return cid;
 982
 983                 cid = cid_info->cid_array[cid_info->cid_alloc++];
 984
 985                 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(
 986                                            phba, cid_from_ulp))
 987                         cid_info->cid_alloc = 0;
 988
 989                 cid_info->avlbl_cids--;
 990         }
 991         return cid;
 992 }
 993
 994 /**
 995  * beiscsi_put_cid - Free the cid
 996  * @phba: The phba for which the cid is being freed
 997  * @cid: The cid to free
 998  */
 999 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
1000 {
1001         uint16_t cid_post_ulp;
1002         struct hwi_controller *phwi_ctrlr;
1003         struct hwi_wrb_context *pwrb_context;
1004         struct ulp_cid_info *cid_info = NULL;
1005         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
1006
1007         phwi_ctrlr = phba->phwi_ctrlr;
1008         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
1009         cid_post_ulp = pwrb_context->ulp_num;
1010
1011         cid_info = phba->cid_array_info[cid_post_ulp];
1012         cid_info->avlbl_cids++;
1013
1014         cid_info->cid_array[cid_info->cid_free++] = cid;
1015         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
1016                 cid_info->cid_free = 0;
1017 }
1018
1019 /**
1020  * beiscsi_free_ep - free endpoint
1021  * @ep: pointer to iscsi endpoint structure
1022  */
1023 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1024 {
1025         struct beiscsi_hba *phba = beiscsi_ep->phba;
1026         struct beiscsi_conn *beiscsi_conn;
1027
1028         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1029         beiscsi_ep->phba = NULL;
1030         phba->ep_array[BE_GET_CRI_FROM_CID
1031                        (beiscsi_ep->ep_cid)] = NULL;
1032
1033         /**
1034          * Check if any connection resource allocated by driver
1035          * is to be freed.This case occurs when target redirection
1036          * or connection retry is done.
1037          **/
1038         if (!beiscsi_ep->conn)
1039                 return;
1040
1041         beiscsi_conn = beiscsi_ep->conn;
1042         if (beiscsi_conn->login_in_progress) {
1043                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1044                                                beiscsi_conn->task);
1045                 beiscsi_conn->login_in_progress = 0;
1046         }
1047 }
1048
1049 /**
1050  * beiscsi_open_conn - Ask FW to open a TCP connection
1051  * @ep: endpoint to be used
1052  * @src_addr: The source IP address
1053  * @dst_addr: The Destination  IP address
1054  *
1055  * Asks the FW to open a TCP connection
1056  */
1057 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1058                              struct sockaddr *src_addr,
1059                              struct sockaddr *dst_addr, int non_blocking)
1060 {
1061         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1062         struct beiscsi_hba *phba = beiscsi_ep->phba;
1063         struct tcp_connect_and_offload_out *ptcpcnct_out;
1064         struct be_dma_mem nonemb_cmd;
1065         unsigned int tag, req_memsize;
1066         int ret = -ENOMEM;
1067
1068         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1069                     "BS_%d : In beiscsi_open_conn\n");
1070
1071         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1072         if (beiscsi_ep->ep_cid == 0xFFFF) {
1073                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1074                             "BS_%d : No free cid available\n");
1075                 return ret;
1076         }
1077
1078         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1079                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1080                     beiscsi_ep->ep_cid);
1081
1082         phba->ep_array[BE_GET_CRI_FROM_CID
1083                        (beiscsi_ep->ep_cid)] = ep;
1084
1085         beiscsi_ep->cid_vld = 0;
1086
1087         if (is_chip_be2_be3r(phba))
1088                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1089         else
1090                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1091
1092         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
1093                                 req_memsize,
1094                                 &nonemb_cmd.dma);
1095         if (nonemb_cmd.va == NULL) {
1096
1097                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1098                             "BS_%d : Failed to allocate memory for"
1099                             " mgmt_open_connection\n");
1100
1101                 beiscsi_free_ep(beiscsi_ep);
1102                 return -ENOMEM;
1103         }
1104         nonemb_cmd.size = req_memsize;
1105         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1106         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1107         if (tag <= 0) {
1108                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1109                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1110                             beiscsi_ep->ep_cid);
1111
1112                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1113                                     nonemb_cmd.va, nonemb_cmd.dma);
1114                 beiscsi_free_ep(beiscsi_ep);
1115                 return -EAGAIN;
1116         }
1117
1118         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1119         if (ret) {
1120                 beiscsi_log(phba, KERN_ERR,
1121                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1122                             "BS_%d : mgmt_open_connection Failed");
1123
1124                 if (ret != -EBUSY)
1125                         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1126                                             nonemb_cmd.va, nonemb_cmd.dma);
1127
1128                 beiscsi_free_ep(beiscsi_ep);
1129                 return ret;
1130         }
1131
1132         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1133         beiscsi_ep = ep->dd_data;
1134         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1135         beiscsi_ep->cid_vld = 1;
1136         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1137                     "BS_%d : mgmt_open_connection Success\n");
1138
1139         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1140                             nonemb_cmd.va, nonemb_cmd.dma);
1141         return 0;
1142 }
1143
1144 /**
1145  * beiscsi_ep_connect - Ask chip to create TCP Conn
1146  * @scsi_host: Pointer to scsi_host structure
1147  * @dst_addr: The IP address of Target
1148  * @non_blocking: blocking or non-blocking call
1149  *
1150  * This routines first asks chip to create a connection and then allocates an EP
1151  */
1152 struct iscsi_endpoint *
1153 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1154                    int non_blocking)
1155 {
1156         struct beiscsi_hba *phba;
1157         struct beiscsi_endpoint *beiscsi_ep;
1158         struct iscsi_endpoint *ep;
1159         int ret;
1160
1161         if (!shost) {
1162                 ret = -ENXIO;
1163                 pr_err("beiscsi_ep_connect shost is NULL\n");
1164                 return ERR_PTR(ret);
1165         }
1166
1167         phba = iscsi_host_priv(shost);
1168         if (beiscsi_hba_in_error(phba)) {
1169                 ret = -EIO;
1170                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1171                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1172                 return ERR_PTR(ret);
1173         }
1174         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1175                 ret = -EBUSY;
1176                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1177                             "BS_%d : The Adapter Port state is Down!!!\n");
1178                 return ERR_PTR(ret);
1179         }
1180
1181         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1182         if (!ep) {
1183                 ret = -ENOMEM;
1184                 return ERR_PTR(ret);
1185         }
1186
1187         beiscsi_ep = ep->dd_data;
1188         beiscsi_ep->phba = phba;
1189         beiscsi_ep->openiscsi_ep = ep;
1190         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1191         if (ret) {
1192                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1193                             "BS_%d : Failed in beiscsi_open_conn\n");
1194                 goto free_ep;
1195         }
1196
1197         return ep;
1198
1199 free_ep:
1200         iscsi_destroy_endpoint(ep);
1201         return ERR_PTR(ret);
1202 }
1203
1204 /**
1205  * beiscsi_ep_poll - Poll to see if connection is established
1206  * @ep: endpoint to be used
1207  * @timeout_ms: timeout specified in millisecs
1208  *
1209  * Poll to see if TCP connection established
1210  */
1211 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1212 {
1213         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1214
1215         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1216                     "BS_%d : In  beiscsi_ep_poll\n");
1217
1218         if (beiscsi_ep->cid_vld == 1)
1219                 return 1;
1220         else
1221                 return 0;
1222 }
1223
1224 /**
1225  * beiscsi_flush_cq()- Flush the CQ created.
1226  * @phba: ptr device priv structure.
1227  *
1228  * Before the connection resource are freed flush
1229  * all the CQ enteries
1230  **/
1231 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1232 {
1233         uint16_t i;
1234         struct be_eq_obj *pbe_eq;
1235         struct hwi_controller *phwi_ctrlr;
1236         struct hwi_context_memory *phwi_context;
1237
1238         phwi_ctrlr = phba->phwi_ctrlr;
1239         phwi_context = phwi_ctrlr->phwi_ctxt;
1240
1241         for (i = 0; i < phba->num_cpus; i++) {
1242                 pbe_eq = &phwi_context->be_eq[i];
1243                 irq_poll_disable(&pbe_eq->iopoll);
1244                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1245                 irq_poll_enable(&pbe_eq->iopoll);
1246         }
1247 }
1248
1249 /**
1250  * beiscsi_close_conn - Upload the  connection
1251  * @ep: The iscsi endpoint
1252  * @flag: The type of connection closure
1253  */
1254 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
1255 {
1256         int ret = 0;
1257         unsigned int tag;
1258         struct beiscsi_hba *phba = beiscsi_ep->phba;
1259
1260         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
1261         if (!tag) {
1262                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1263                             "BS_%d : upload failed for cid 0x%x\n",
1264                             beiscsi_ep->ep_cid);
1265
1266                 ret = -EAGAIN;
1267         }
1268
1269         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1270
1271         /* Flush the CQ entries */
1272         beiscsi_flush_cq(phba);
1273
1274         return ret;
1275 }
1276
1277 /**
1278  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
1279  * @phba: The phba instance
1280  * @cid: The cid to free
1281  */
1282 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
1283                                       unsigned int cid)
1284 {
1285         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
1286
1287         if (phba->conn_table[cri_index])
1288                 phba->conn_table[cri_index] = NULL;
1289         else {
1290                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1291                             "BS_%d : Connection table Not occupied.\n");
1292                 return -EINVAL;
1293         }
1294         return 0;
1295 }
1296
1297 /**
1298  * beiscsi_ep_disconnect - Tears down the TCP connection
1299  * @ep: endpoint to be used
1300  *
1301  * Tears down the TCP connection
1302  */
1303 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1304 {
1305         struct beiscsi_conn *beiscsi_conn;
1306         struct beiscsi_endpoint *beiscsi_ep;
1307         struct beiscsi_hba *phba;
1308         unsigned int tag;
1309         uint8_t mgmt_invalidate_flag, tcp_upload_flag;
1310         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
1311
1312         beiscsi_ep = ep->dd_data;
1313         phba = beiscsi_ep->phba;
1314         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1315                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %d\n",
1316                     beiscsi_ep->ep_cid);
1317
1318         if (beiscsi_ep->conn) {
1319                 beiscsi_conn = beiscsi_ep->conn;
1320                 iscsi_suspend_queue(beiscsi_conn->conn);
1321                 mgmt_invalidate_flag = ~BEISCSI_NO_RST_ISSUE;
1322                 tcp_upload_flag = CONNECTION_UPLOAD_GRACEFUL;
1323         } else {
1324                 mgmt_invalidate_flag = BEISCSI_NO_RST_ISSUE;
1325                 tcp_upload_flag = CONNECTION_UPLOAD_ABORT;
1326         }
1327
1328         if (beiscsi_hba_in_error(phba)) {
1329                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1330                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1331                 goto free_ep;
1332         }
1333
1334         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
1335                                           beiscsi_ep->ep_cid,
1336                                           mgmt_invalidate_flag,
1337                                           savecfg_flag);
1338         if (!tag) {
1339                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1340                             "BS_%d : mgmt_invalidate_connection Failed for cid=%d\n",
1341                             beiscsi_ep->ep_cid);
1342         }
1343
1344         beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1345         beiscsi_close_conn(beiscsi_ep, tcp_upload_flag);
1346 free_ep:
1347         msleep(BEISCSI_LOGOUT_SYNC_DELAY);
1348         beiscsi_free_ep(beiscsi_ep);
1349         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
1350         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1351 }
1352
1353 umode_t beiscsi_attr_is_visible(int param_type, int param)
1354 {
1355         switch (param_type) {
1356         case ISCSI_NET_PARAM:
1357                 switch (param) {
1358                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1359                 case ISCSI_NET_PARAM_IPV4_ADDR:
1360                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1361                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1362                 case ISCSI_NET_PARAM_IPV4_GW:
1363                 case ISCSI_NET_PARAM_IPV6_ADDR:
1364                 case ISCSI_NET_PARAM_VLAN_ID:
1365                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1366                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1367                         return S_IRUGO;
1368                 default:
1369                         return 0;
1370                 }
1371         case ISCSI_HOST_PARAM:
1372                 switch (param) {
1373                 case ISCSI_HOST_PARAM_HWADDRESS:
1374                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1375                 case ISCSI_HOST_PARAM_PORT_STATE:
1376                 case ISCSI_HOST_PARAM_PORT_SPEED:
1377                         return S_IRUGO;
1378                 default:
1379                         return 0;
1380                 }
1381         case ISCSI_PARAM:
1382                 switch (param) {
1383                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1384                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1385                 case ISCSI_PARAM_HDRDGST_EN:
1386                 case ISCSI_PARAM_DATADGST_EN:
1387                 case ISCSI_PARAM_CONN_ADDRESS:
1388                 case ISCSI_PARAM_CONN_PORT:
1389                 case ISCSI_PARAM_EXP_STATSN:
1390                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1391                 case ISCSI_PARAM_PERSISTENT_PORT:
1392                 case ISCSI_PARAM_PING_TMO:
1393                 case ISCSI_PARAM_RECV_TMO:
1394                 case ISCSI_PARAM_INITIAL_R2T_EN:
1395                 case ISCSI_PARAM_MAX_R2T:
1396                 case ISCSI_PARAM_IMM_DATA_EN:
1397                 case ISCSI_PARAM_FIRST_BURST:
1398                 case ISCSI_PARAM_MAX_BURST:
1399                 case ISCSI_PARAM_PDU_INORDER_EN:
1400                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1401                 case ISCSI_PARAM_ERL:
1402                 case ISCSI_PARAM_TARGET_NAME:
1403                 case ISCSI_PARAM_TPGT:
1404                 case ISCSI_PARAM_USERNAME:
1405                 case ISCSI_PARAM_PASSWORD:
1406                 case ISCSI_PARAM_USERNAME_IN:
1407                 case ISCSI_PARAM_PASSWORD_IN:
1408                 case ISCSI_PARAM_FAST_ABORT:
1409                 case ISCSI_PARAM_ABORT_TMO:
1410                 case ISCSI_PARAM_LU_RESET_TMO:
1411                 case ISCSI_PARAM_IFACE_NAME:
1412                 case ISCSI_PARAM_INITIATOR_NAME:
1413                         return S_IRUGO;
1414                 default:
1415                         return 0;
1416                 }
1417         }
1418
1419         return 0;
1420 }