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                 printk(KERN_ERR
  56                        "beiscsi_session_create: invalid ep\n");
  57                 return NULL;
  58         }
  59         beiscsi_ep = ep->dd_data;
  60         phba = beiscsi_ep->phba;
  61
  62         if (phba->state & BE_ADAPTER_PCI_ERR) {
  63                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  64                             "BS_%d : PCI_ERROR Recovery\n");
  65                 return NULL;
  66         } else {
  67                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  68                             "BS_%d : In beiscsi_session_create\n");
  69         }
  70
  71         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  72                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  73                             "BS_%d : Cannot handle %d cmds."
  74                             "Max cmds per session supported is %d. Using %d."
  75                             "\n", cmds_max,
  76                             beiscsi_ep->phba->params.wrbs_per_cxn,
  77                             beiscsi_ep->phba->params.wrbs_per_cxn);
  78
  79                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  80         }
  81
  82         shost = phba->shost;
  83         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  84                                           shost, cmds_max,
  85                                           sizeof(*beiscsi_sess),
  86                                           sizeof(*io_task),
  87                                           initial_cmdsn, ISCSI_MAX_TARGET);
  88         if (!cls_session)
  89                 return NULL;
  90         sess = cls_session->dd_data;
  91         beiscsi_sess = sess->dd_data;
  92         beiscsi_sess->bhs_pool =  pci_pool_create("beiscsi_bhs_pool",
  93                                                    phba->pcidev,
  94                                                    sizeof(struct be_cmd_bhs),
  95                                                    64, 0);
  96         if (!beiscsi_sess->bhs_pool)
  97                 goto destroy_sess;
  98
  99         return cls_session;
 100 destroy_sess:
 101         iscsi_session_teardown(cls_session);
 102         return NULL;
 103 }
 104
 105 /**
 106  * beiscsi_session_destroy - destroys iscsi session
 107  * @cls_session:        pointer to iscsi cls session
 108  *
 109  * Destroys iSCSI session instance and releases
 110  * resources allocated for it.
 111  */
 112 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 113 {
 114         struct iscsi_session *sess = cls_session->dd_data;
 115         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 116
 117         printk(KERN_INFO "In beiscsi_session_destroy\n");
 118         pci_pool_destroy(beiscsi_sess->bhs_pool);
 119         iscsi_session_teardown(cls_session);
 120 }
 121
 122 /**
 123  * beiscsi_conn_create - create an instance of iscsi connection
 124  * @cls_session: ptr to iscsi_cls_session
 125  * @cid: iscsi cid
 126  */
 127 struct iscsi_cls_conn *
 128 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 129 {
 130         struct beiscsi_hba *phba;
 131         struct Scsi_Host *shost;
 132         struct iscsi_cls_conn *cls_conn;
 133         struct beiscsi_conn *beiscsi_conn;
 134         struct iscsi_conn *conn;
 135         struct iscsi_session *sess;
 136         struct beiscsi_session *beiscsi_sess;
 137
 138         shost = iscsi_session_to_shost(cls_session);
 139         phba = iscsi_host_priv(shost);
 140
 141         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 142                     "BS_%d : In beiscsi_conn_create ,cid"
 143                     "from iscsi layer=%d\n", cid);
 144
 145         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 146         if (!cls_conn)
 147                 return NULL;
 148
 149         conn = cls_conn->dd_data;
 150         beiscsi_conn = conn->dd_data;
 151         beiscsi_conn->ep = NULL;
 152         beiscsi_conn->phba = phba;
 153         beiscsi_conn->conn = conn;
 154         sess = cls_session->dd_data;
 155         beiscsi_sess = sess->dd_data;
 156         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 157         return cls_conn;
 158 }
 159
 160 /**
 161  * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
 162  * @beiscsi_conn: The pointer to  beiscsi_conn structure
 163  * @phba: The phba instance
 164  * @cid: The cid to free
 165  */
 166 static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
 167                                 struct beiscsi_conn *beiscsi_conn,
 168                                 unsigned int cid)
 169 {
 170         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
 171
 172         if (phba->conn_table[cri_index]) {
 173                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 174                             "BS_%d : Connection table already occupied. Detected clash\n");
 175
 176                 return -EINVAL;
 177         } else {
 178                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 179                             "BS_%d : phba->conn_table[%d]=%p(beiscsi_conn)\n",
 180                             cri_index, beiscsi_conn);
 181
 182                 phba->conn_table[cri_index] = beiscsi_conn;
 183         }
 184         return 0;
 185 }
 186
 187 /**
 188  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 189  * @cls_session: pointer to iscsi cls session
 190  * @cls_conn: pointer to iscsi cls conn
 191  * @transport_fd: EP handle(64 bit)
 192  *
 193  * This function binds the TCP Conn with iSCSI Connection and Session.
 194  */
 195 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 196                       struct iscsi_cls_conn *cls_conn,
 197                       u64 transport_fd, int is_leading)
 198 {
 199         struct iscsi_conn *conn = cls_conn->dd_data;
 200         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 201         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
 202         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 203         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
 204         struct hwi_wrb_context *pwrb_context;
 205         struct beiscsi_endpoint *beiscsi_ep;
 206         struct iscsi_endpoint *ep;
 207
 208         ep = iscsi_lookup_endpoint(transport_fd);
 209         if (!ep)
 210                 return -EINVAL;
 211
 212         beiscsi_ep = ep->dd_data;
 213
 214         if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 215                 return -EINVAL;
 216
 217         if (beiscsi_ep->phba != phba) {
 218                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 219                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
 220                             beiscsi_ep->phba, phba);
 221
 222                 return -EEXIST;
 223         }
 224
 225         pwrb_context = &phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(
 226                                                 beiscsi_ep->ep_cid)];
 227
 228         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 229         beiscsi_conn->ep = beiscsi_ep;
 230         beiscsi_ep->conn = beiscsi_conn;
 231         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
 232
 233         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 234                     "BS_%d : beiscsi_conn=%p conn=%p ep_cid=%d\n",
 235                     beiscsi_conn, conn, beiscsi_ep->ep_cid);
 236
 237         return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
 238 }
 239
 240 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
 241 {
 242         if (phba->ipv4_iface)
 243                 return 0;
 244
 245         phba->ipv4_iface = iscsi_create_iface(phba->shost,
 246                                               &beiscsi_iscsi_transport,
 247                                               ISCSI_IFACE_TYPE_IPV4,
 248                                               0, 0);
 249         if (!phba->ipv4_iface) {
 250                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 251                             "BS_%d : Could not "
 252                             "create default IPv4 address.\n");
 253                 return -ENODEV;
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
 260 {
 261         if (phba->ipv6_iface)
 262                 return 0;
 263
 264         phba->ipv6_iface = iscsi_create_iface(phba->shost,
 265                                               &beiscsi_iscsi_transport,
 266                                               ISCSI_IFACE_TYPE_IPV6,
 267                                               0, 0);
 268         if (!phba->ipv6_iface) {
 269                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 270                             "BS_%d : Could not "
 271                             "create default IPv6 address.\n");
 272                 return -ENODEV;
 273         }
 274
 275         return 0;
 276 }
 277
 278 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 279 {
 280         struct be_cmd_get_if_info_resp *if_info;
 281
 282         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 283                 beiscsi_iface_create_ipv4(phba);
 284                 kfree(if_info);
 285         }
 286
 287         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 288                 beiscsi_iface_create_ipv6(phba);
 289                 kfree(if_info);
 290         }
 291 }
 292
 293 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
 294 {
 295         if (phba->ipv6_iface) {
 296                 iscsi_destroy_iface(phba->ipv6_iface);
 297                 phba->ipv6_iface = NULL;
 298         }
 299         if (phba->ipv4_iface) {
 300                 iscsi_destroy_iface(phba->ipv4_iface);
 301                 phba->ipv4_iface = NULL;
 302         }
 303 }
 304
 305 /**
 306  * beiscsi_set_vlan_tag()- Set the VLAN TAG
 307  * @shost: Scsi Host for the driver instance
 308  * @iface_param: Interface paramters
 309  *
 310  * Set the VLAN TAG for the adapter or disable
 311  * the VLAN config
 312  *
 313  * returns
 314  *      Success: 0
 315  *      Failure: Non-Zero Value
 316  **/
 317 static int
 318 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
 319                           struct iscsi_iface_param_info *iface_param)
 320 {
 321         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 322         int ret = -EPERM;
 323
 324         switch (iface_param->param) {
 325         case ISCSI_NET_PARAM_VLAN_ENABLED:
 326                 ret = 0;
 327                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
 328                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
 329                 break;
 330         case ISCSI_NET_PARAM_VLAN_TAG:
 331                 ret = beiscsi_if_set_vlan(phba,
 332                                           *((uint16_t *)iface_param->value));
 333                 break;
 334         }
 335         return ret;
 336 }
 337
 338
 339 static int
 340 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 341                           struct iscsi_iface_param_info *info,
 342                           void *data, uint32_t dt_len)
 343 {
 344         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 345         u8 *ip = NULL, *subnet = NULL, *gw;
 346         struct nlattr *nla;
 347         int ret = -EPERM;
 348
 349         /* Check the param */
 350         switch (info->param) {
 351         case ISCSI_NET_PARAM_IFACE_ENABLE:
 352                 if (info->value[0] == ISCSI_IFACE_ENABLE)
 353                         ret = beiscsi_iface_create_ipv4(phba);
 354                 else {
 355                         iscsi_destroy_iface(phba->ipv4_iface);
 356                         phba->ipv4_iface = NULL;
 357                 }
 358                 break;
 359         case ISCSI_NET_PARAM_IPV4_GW:
 360                 gw = info->value;
 361                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 362                 break;
 363         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 364                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
 365                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 366                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 367                         /* release DHCP IP address */
 368                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 369                                                    NULL, NULL);
 370                 else
 371                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 372                                     "BS_%d : Invalid BOOTPROTO: %d\n",
 373                                     info->value[0]);
 374                 break;
 375         case ISCSI_NET_PARAM_IPV4_ADDR:
 376                 ip = info->value;
 377                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
 378                 if (nla) {
 379                         info = nla_data(nla);
 380                         subnet = info->value;
 381                 }
 382                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 383                                            ip, subnet);
 384                 break;
 385         case ISCSI_NET_PARAM_IPV4_SUBNET:
 386                 /*
 387                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
 388                  * and subnet both. Find IP to be applied for this subnet.
 389                  */
 390                 subnet = info->value;
 391                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
 392                 if (nla) {
 393                         info = nla_data(nla);
 394                         ip = info->value;
 395                 }
 396                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 397                                            ip, subnet);
 398                 break;
 399         }
 400
 401         return ret;
 402 }
 403
 404 static int
 405 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 406                           struct iscsi_iface_param_info *iface_param,
 407                           void *data, uint32_t dt_len)
 408 {
 409         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 410         int ret = -EPERM;
 411
 412         switch (iface_param->param) {
 413         case ISCSI_NET_PARAM_IFACE_ENABLE:
 414                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
 415                         ret = beiscsi_iface_create_ipv6(phba);
 416                 else {
 417                         iscsi_destroy_iface(phba->ipv6_iface);
 418                         phba->ipv6_iface = NULL;
 419                 }
 420                 break;
 421         case ISCSI_NET_PARAM_IPV6_ADDR:
 422                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 423                                            iface_param->value, NULL);
 424                 break;
 425         }
 426
 427         return ret;
 428 }
 429
 430 int beiscsi_iface_set_param(struct Scsi_Host *shost,
 431                             void *data, uint32_t dt_len)
 432 {
 433         struct iscsi_iface_param_info *iface_param = NULL;
 434         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 435         struct nlattr *attrib;
 436         uint32_t rm_len = dt_len;
 437         int ret;
 438
 439         if (phba->state & BE_ADAPTER_PCI_ERR) {
 440                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 441                             "BS_%d : In PCI_ERROR Recovery\n");
 442                 return -EBUSY;
 443         }
 444
 445         /* update interface_handle */
 446         ret = beiscsi_if_get_handle(phba);
 447         if (ret) {
 448                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 449                             "BS_%d : Getting Interface Handle Failed\n");
 450                 return ret;
 451         }
 452
 453         nla_for_each_attr(attrib, data, dt_len, rm_len) {
 454                 iface_param = nla_data(attrib);
 455
 456                 if (iface_param->param_type != ISCSI_NET_PARAM)
 457                         continue;
 458
 459                 /*
 460                  * BE2ISCSI only supports 1 interface
 461                  */
 462                 if (iface_param->iface_num) {
 463                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 464                                     "BS_%d : Invalid iface_num %d."
 465                                     "Only iface_num 0 is supported.\n",
 466                                     iface_param->iface_num);
 467
 468                         return -EINVAL;
 469                 }
 470
 471                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 472                             "BS_%d : %s.0 set param %d",
 473                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 474                             "ipv4" : "ipv6", iface_param->param);
 475
 476                 ret = -EPERM;
 477                 switch (iface_param->param) {
 478                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 479                 case ISCSI_NET_PARAM_VLAN_TAG:
 480                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 481                         break;
 482                 default:
 483                         switch (iface_param->iface_type) {
 484                         case ISCSI_IFACE_TYPE_IPV4:
 485                                 ret = beiscsi_iface_config_ipv4(shost,
 486                                                                 iface_param,
 487                                                                 data, dt_len);
 488                                 break;
 489                         case ISCSI_IFACE_TYPE_IPV6:
 490                                 ret = beiscsi_iface_config_ipv6(shost,
 491                                                                 iface_param,
 492                                                                 data, dt_len);
 493                                 break;
 494                         }
 495                 }
 496
 497                 if (ret == -EPERM) {
 498                         __beiscsi_log(phba, KERN_ERR,
 499                                       "BS_%d : %s.0 set param %d not permitted",
 500                                       (iface_param->iface_type ==
 501                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 502                                       iface_param->param);
 503                         ret = 0;
 504                 }
 505                 if (ret)
 506                         break;
 507         }
 508
 509         return ret;
 510 }
 511
 512 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 513                                      struct iscsi_iface *iface,
 514                                      int param, char *buf)
 515 {
 516         struct be_cmd_get_if_info_resp *if_info;
 517         int len, ip_type = BEISCSI_IP_TYPE_V4;
 518
 519         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 520                 ip_type = BEISCSI_IP_TYPE_V6;
 521
 522         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 523         if (len)
 524                 return len;
 525
 526         switch (param) {
 527         case ISCSI_NET_PARAM_IPV4_ADDR:
 528                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 529                 break;
 530         case ISCSI_NET_PARAM_IPV6_ADDR:
 531                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 532                 break;
 533         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 534                 if (!if_info->dhcp_state)
 535                         len = sprintf(buf, "static\n");
 536                 else
 537                         len = sprintf(buf, "dhcp\n");
 538                 break;
 539         case ISCSI_NET_PARAM_IPV4_SUBNET:
 540                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 541                 break;
 542         case ISCSI_NET_PARAM_VLAN_ENABLED:
 543                 len = sprintf(buf, "%s\n",
 544                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 545                               "disable" : "enable");
 546                 break;
 547         case ISCSI_NET_PARAM_VLAN_ID:
 548                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 549                         len = -EINVAL;
 550                 else
 551                         len = sprintf(buf, "%d\n",
 552                                       (if_info->vlan_priority &
 553                                        ISCSI_MAX_VLAN_ID));
 554                 break;
 555         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 556                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 557                         len = -EINVAL;
 558                 else
 559                         len = sprintf(buf, "%d\n",
 560                                       ((if_info->vlan_priority >> 13) &
 561                                        ISCSI_MAX_VLAN_PRIORITY));
 562                 break;
 563         default:
 564                 WARN_ON(1);
 565         }
 566
 567         kfree(if_info);
 568         return len;
 569 }
 570
 571 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 572                             enum iscsi_param_type param_type,
 573                             int param, char *buf)
 574 {
 575         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 576         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 577         struct be_cmd_get_def_gateway_resp gateway;
 578         int len = -EPERM;
 579
 580         if (param_type != ISCSI_NET_PARAM)
 581                 return 0;
 582         if (phba->state & BE_ADAPTER_PCI_ERR) {
 583                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 584                             "BS_%d : In PCI_ERROR Recovery\n");
 585                 return -EBUSY;
 586         }
 587
 588         switch (param) {
 589         case ISCSI_NET_PARAM_IPV4_ADDR:
 590         case ISCSI_NET_PARAM_IPV4_SUBNET:
 591         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 592         case ISCSI_NET_PARAM_IPV6_ADDR:
 593         case ISCSI_NET_PARAM_VLAN_ENABLED:
 594         case ISCSI_NET_PARAM_VLAN_ID:
 595         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 596                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 597                 break;
 598         case ISCSI_NET_PARAM_IFACE_ENABLE:
 599                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 600                         len = sprintf(buf, "%s\n",
 601                                       phba->ipv4_iface ? "enable" : "disable");
 602                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 603                         len = sprintf(buf, "%s\n",
 604                                       phba->ipv6_iface ? "enable" : "disable");
 605                 break;
 606         case ISCSI_NET_PARAM_IPV4_GW:
 607                 memset(&gateway, 0, sizeof(gateway));
 608                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 609                 if (!len)
 610                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 611                 break;
 612         }
 613
 614         return len;
 615 }
 616
 617 /**
 618  * beiscsi_ep_get_param - get the iscsi parameter
 619  * @ep: pointer to iscsi ep
 620  * @param: parameter type identifier
 621  * @buf: buffer pointer
 622  *
 623  * returns iscsi parameter
 624  */
 625 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 626                            enum iscsi_param param, char *buf)
 627 {
 628         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 629         int len;
 630
 631         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 632                     BEISCSI_LOG_CONFIG,
 633                     "BS_%d : In beiscsi_ep_get_param,"
 634                     " param= %d\n", param);
 635
 636         switch (param) {
 637         case ISCSI_PARAM_CONN_PORT:
 638                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 639                 break;
 640         case ISCSI_PARAM_CONN_ADDRESS:
 641                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 642                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 643                 else
 644                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 645                 break;
 646         default:
 647                 len = -EPERM;
 648         }
 649         return len;
 650 }
 651
 652 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 653                       enum iscsi_param param, char *buf, int buflen)
 654 {
 655         struct iscsi_conn *conn = cls_conn->dd_data;
 656         struct iscsi_session *session = conn->session;
 657         struct beiscsi_hba *phba = NULL;
 658         int ret;
 659
 660         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 661         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 662                     "BS_%d : In beiscsi_conn_set_param,"
 663                     " param= %d\n", param);
 664
 665         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 666         if (ret)
 667                 return ret;
 668         /*
 669          * If userspace tried to set the value to higher than we can
 670          * support override here.
 671          */
 672         switch (param) {
 673         case ISCSI_PARAM_FIRST_BURST:
 674                 if (session->first_burst > 8192)
 675                         session->first_burst = 8192;
 676                 break;
 677         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 678                 if (conn->max_recv_dlength > 65536)
 679                         conn->max_recv_dlength = 65536;
 680                 break;
 681         case ISCSI_PARAM_MAX_BURST:
 682                 if (session->max_burst > 262144)
 683                         session->max_burst = 262144;
 684                 break;
 685         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 686                 if (conn->max_xmit_dlength > 65536)
 687                         conn->max_xmit_dlength = 65536;
 688         default:
 689                 return 0;
 690         }
 691
 692         return 0;
 693 }
 694
 695 /**
 696  * beiscsi_get_initname - Read Initiator Name from flash
 697  * @buf: buffer bointer
 698  * @phba: The device priv structure instance
 699  *
 700  * returns number of bytes
 701  */
 702 static int beiscsi_get_initname(char *buf, struct beiscsi_hba *phba)
 703 {
 704         int rc;
 705         unsigned int tag;
 706         struct be_mcc_wrb *wrb;
 707         struct be_cmd_hba_name *resp;
 708
 709         tag = be_cmd_get_initname(phba);
 710         if (!tag) {
 711                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 712                             "BS_%d : Getting Initiator Name Failed\n");
 713
 714                 return -EBUSY;
 715         }
 716
 717         rc = beiscsi_mccq_compl_wait(phba, tag, &wrb, NULL);
 718         if (rc) {
 719                 beiscsi_log(phba, KERN_ERR,
 720                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
 721                             "BS_%d : Initiator Name MBX Failed\n");
 722                 return rc;
 723         }
 724
 725         resp = embedded_payload(wrb);
 726         rc = sprintf(buf, "%s\n", resp->initiator_name);
 727         return rc;
 728 }
 729
 730 /**
 731  * beiscsi_get_port_state - Get the Port State
 732  * @shost : pointer to scsi_host structure
 733  *
 734  */
 735 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 736 {
 737         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 738         struct iscsi_cls_host *ihost = shost->shost_data;
 739
 740         ihost->port_state = (phba->state & BE_ADAPTER_LINK_UP) ?
 741                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 742 }
 743
 744 /**
 745  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 746  * @shost : pointer to scsi_host structure
 747  *
 748  */
 749 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 750 {
 751         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 752         struct iscsi_cls_host *ihost = shost->shost_data;
 753
 754         switch (phba->port_speed) {
 755         case BE2ISCSI_LINK_SPEED_10MBPS:
 756                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 757                 break;
 758         case BE2ISCSI_LINK_SPEED_100MBPS:
 759                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 760                 break;
 761         case BE2ISCSI_LINK_SPEED_1GBPS:
 762                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 763                 break;
 764         case BE2ISCSI_LINK_SPEED_10GBPS:
 765                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 766                 break;
 767         case BE2ISCSI_LINK_SPEED_25GBPS:
 768                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 769                 break;
 770         case BE2ISCSI_LINK_SPEED_40GBPS:
 771                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 772                 break;
 773         default:
 774                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 775         }
 776 }
 777
 778 /**
 779  * beiscsi_get_host_param - get the iscsi parameter
 780  * @shost: pointer to scsi_host structure
 781  * @param: parameter type identifier
 782  * @buf: buffer pointer
 783  *
 784  * returns host parameter
 785  */
 786 int beiscsi_get_host_param(struct Scsi_Host *shost,
 787                            enum iscsi_host_param param, char *buf)
 788 {
 789         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 790         int status = 0;
 791
 792
 793         if (phba->state & BE_ADAPTER_PCI_ERR) {
 794                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 795                             "BS_%d : In PCI_ERROR Recovery\n");
 796                 return -EBUSY;
 797         } else {
 798                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 799                             "BS_%d : In beiscsi_get_host_param,"
 800                             " param = %d\n", param);
 801         }
 802
 803         switch (param) {
 804         case ISCSI_HOST_PARAM_HWADDRESS:
 805                 status = beiscsi_get_macaddr(buf, phba);
 806                 if (status < 0) {
 807                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 808                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 809                         return status;
 810                 }
 811                 break;
 812         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 813                 status = beiscsi_get_initname(buf, phba);
 814                 if (status < 0) {
 815                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 816                                     "BS_%d : Retreiving Initiator Name Failed\n");
 817                         return status;
 818                 }
 819                 break;
 820         case ISCSI_HOST_PARAM_PORT_STATE:
 821                 beiscsi_get_port_state(shost);
 822                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 823                 break;
 824         case ISCSI_HOST_PARAM_PORT_SPEED:
 825                 beiscsi_get_port_speed(shost);
 826                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 827                 break;
 828         default:
 829                 return iscsi_host_get_param(shost, param, buf);
 830         }
 831         return status;
 832 }
 833
 834 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 835 {
 836         struct be_cmd_get_nic_conf_resp resp;
 837         int rc;
 838
 839         if (phba->mac_addr_set)
 840                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 841
 842         memset(&resp, 0, sizeof(resp));
 843         rc = mgmt_get_nic_conf(phba, &resp);
 844         if (rc)
 845                 return rc;
 846
 847         phba->mac_addr_set = true;
 848         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 849         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 850 }
 851
 852 /**
 853  * beiscsi_conn_get_stats - get the iscsi stats
 854  * @cls_conn: pointer to iscsi cls conn
 855  * @stats: pointer to iscsi_stats structure
 856  *
 857  * returns iscsi stats
 858  */
 859 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 860                             struct iscsi_stats *stats)
 861 {
 862         struct iscsi_conn *conn = cls_conn->dd_data;
 863         struct beiscsi_hba *phba = NULL;
 864
 865         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 866         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 867                     "BS_%d : In beiscsi_conn_get_stats\n");
 868
 869         stats->txdata_octets = conn->txdata_octets;
 870         stats->rxdata_octets = conn->rxdata_octets;
 871         stats->dataout_pdus = conn->dataout_pdus_cnt;
 872         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 873         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 874         stats->datain_pdus = conn->datain_pdus_cnt;
 875         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 876         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 877         stats->r2t_pdus = conn->r2t_pdus_cnt;
 878         stats->digest_err = 0;
 879         stats->timeout_err = 0;
 880         stats->custom_length = 1;
 881         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 882         stats->custom[0].value = conn->eh_abort_cnt;
 883 }
 884
 885 /**
 886  * beiscsi_set_params_for_offld - get the parameters for offload
 887  * @beiscsi_conn: pointer to beiscsi_conn
 888  * @params: pointer to offload_params structure
 889  */
 890 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 891                                           struct beiscsi_offload_params *params)
 892 {
 893         struct iscsi_conn *conn = beiscsi_conn->conn;
 894         struct iscsi_session *session = conn->session;
 895
 896         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 897                       params, session->max_burst);
 898         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 899                       max_send_data_segment_length, params,
 900                       conn->max_xmit_dlength);
 901         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 902                       params, session->first_burst);
 903         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 904                       session->erl);
 905         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 906                       conn->datadgst_en);
 907         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 908                       conn->hdrdgst_en);
 909         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 910                       session->initial_r2t_en);
 911         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 912                       session->imm_data_en);
 913         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 914                       data_seq_inorder, params,
 915                       session->dataseq_inorder_en);
 916         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 917                       pdu_seq_inorder, params,
 918                       session->pdu_inorder_en);
 919         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 920                       session->max_r2t);
 921         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 922                       (conn->exp_statsn - 1));
 923         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 924                       max_recv_data_segment_length, params,
 925                       conn->max_recv_dlength);
 926
 927 }
 928
 929 /**
 930  * beiscsi_conn_start - offload of session to chip
 931  * @cls_conn: pointer to beiscsi_conn
 932  */
 933 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 934 {
 935         struct iscsi_conn *conn = cls_conn->dd_data;
 936         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 937         struct beiscsi_endpoint *beiscsi_ep;
 938         struct beiscsi_offload_params params;
 939         struct beiscsi_hba *phba;
 940
 941         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 942
 943         if (phba->state & BE_ADAPTER_PCI_ERR) {
 944                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 945                             "BS_%d : In PCI_ERROR Recovery\n");
 946                 return -EBUSY;
 947         } else {
 948                 beiscsi_log(beiscsi_conn->phba, KERN_INFO,
 949                             BEISCSI_LOG_CONFIG,
 950                             "BS_%d : In beiscsi_conn_start\n");
 951         }
 952
 953         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 954         beiscsi_ep = beiscsi_conn->ep;
 955         if (!beiscsi_ep)
 956                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 957                             BEISCSI_LOG_CONFIG,
 958                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 959
 960         beiscsi_conn->login_in_progress = 0;
 961         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 962         beiscsi_offload_connection(beiscsi_conn, &params);
 963         iscsi_conn_start(cls_conn);
 964         return 0;
 965 }
 966
 967 /**
 968  * beiscsi_get_cid - Allocate a cid
 969  * @phba: The phba instance
 970  */
 971 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 972 {
 973         unsigned short cid = 0xFFFF, cid_from_ulp;
 974         struct ulp_cid_info *cid_info = NULL;
 975         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 976
 977         /* Find the ULP which has more CID available */
 978         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 979                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 980         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 981                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 982         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 983                         BEISCSI_ULP0 : BEISCSI_ULP1;
 984
 985         if (test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) {
 986                 cid_info = phba->cid_array_info[cid_from_ulp];
 987                 if (!cid_info->avlbl_cids)
 988                         return cid;
 989
 990                 cid = cid_info->cid_array[cid_info->cid_alloc++];
 991
 992                 if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(
 993                                            phba, cid_from_ulp))
 994                         cid_info->cid_alloc = 0;
 995
 996                 cid_info->avlbl_cids--;
 997         }
 998         return cid;
 999 }
1000
1001 /**
1002  * beiscsi_put_cid - Free the cid
1003  * @phba: The phba for which the cid is being freed
1004  * @cid: The cid to free
1005  */
1006 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
1007 {
1008         uint16_t cid_post_ulp;
1009         struct hwi_controller *phwi_ctrlr;
1010         struct hwi_wrb_context *pwrb_context;
1011         struct ulp_cid_info *cid_info = NULL;
1012         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
1013
1014         phwi_ctrlr = phba->phwi_ctrlr;
1015         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
1016         cid_post_ulp = pwrb_context->ulp_num;
1017
1018         cid_info = phba->cid_array_info[cid_post_ulp];
1019         cid_info->avlbl_cids++;
1020
1021         cid_info->cid_array[cid_info->cid_free++] = cid;
1022         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
1023                 cid_info->cid_free = 0;
1024 }
1025
1026 /**
1027  * beiscsi_free_ep - free endpoint
1028  * @ep: pointer to iscsi endpoint structure
1029  */
1030 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1031 {
1032         struct beiscsi_hba *phba = beiscsi_ep->phba;
1033         struct beiscsi_conn *beiscsi_conn;
1034
1035         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1036         beiscsi_ep->phba = NULL;
1037         phba->ep_array[BE_GET_CRI_FROM_CID
1038                        (beiscsi_ep->ep_cid)] = NULL;
1039
1040         /**
1041          * Check if any connection resource allocated by driver
1042          * is to be freed.This case occurs when target redirection
1043          * or connection retry is done.
1044          **/
1045         if (!beiscsi_ep->conn)
1046                 return;
1047
1048         beiscsi_conn = beiscsi_ep->conn;
1049         if (beiscsi_conn->login_in_progress) {
1050                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1051                                                beiscsi_conn->task);
1052                 beiscsi_conn->login_in_progress = 0;
1053         }
1054 }
1055
1056 /**
1057  * beiscsi_open_conn - Ask FW to open a TCP connection
1058  * @ep: endpoint to be used
1059  * @src_addr: The source IP address
1060  * @dst_addr: The Destination  IP address
1061  *
1062  * Asks the FW to open a TCP connection
1063  */
1064 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1065                              struct sockaddr *src_addr,
1066                              struct sockaddr *dst_addr, int non_blocking)
1067 {
1068         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1069         struct beiscsi_hba *phba = beiscsi_ep->phba;
1070         struct tcp_connect_and_offload_out *ptcpcnct_out;
1071         struct be_dma_mem nonemb_cmd;
1072         unsigned int tag, req_memsize;
1073         int ret = -ENOMEM;
1074
1075         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1076                     "BS_%d : In beiscsi_open_conn\n");
1077
1078         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1079         if (beiscsi_ep->ep_cid == 0xFFFF) {
1080                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1081                             "BS_%d : No free cid available\n");
1082                 return ret;
1083         }
1084
1085         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1086                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1087                     beiscsi_ep->ep_cid);
1088
1089         phba->ep_array[BE_GET_CRI_FROM_CID
1090                        (beiscsi_ep->ep_cid)] = ep;
1091
1092         beiscsi_ep->cid_vld = 0;
1093
1094         if (is_chip_be2_be3r(phba))
1095                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1096         else
1097                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1098
1099         nonemb_cmd.va = pci_alloc_consistent(phba->ctrl.pdev,
1100                                 req_memsize,
1101                                 &nonemb_cmd.dma);
1102         if (nonemb_cmd.va == NULL) {
1103
1104                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1105                             "BS_%d : Failed to allocate memory for"
1106                             " mgmt_open_connection\n");
1107
1108                 beiscsi_free_ep(beiscsi_ep);
1109                 return -ENOMEM;
1110         }
1111         nonemb_cmd.size = req_memsize;
1112         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1113         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1114         if (tag <= 0) {
1115                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1116                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1117                             beiscsi_ep->ep_cid);
1118
1119                 pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1120                                     nonemb_cmd.va, nonemb_cmd.dma);
1121                 beiscsi_free_ep(beiscsi_ep);
1122                 return -EAGAIN;
1123         }
1124
1125         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1126         if (ret) {
1127                 beiscsi_log(phba, KERN_ERR,
1128                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1129                             "BS_%d : mgmt_open_connection Failed");
1130
1131                 if (ret != -EBUSY)
1132                         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1133                                             nonemb_cmd.va, nonemb_cmd.dma);
1134
1135                 beiscsi_free_ep(beiscsi_ep);
1136                 return ret;
1137         }
1138
1139         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1140         beiscsi_ep = ep->dd_data;
1141         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1142         beiscsi_ep->cid_vld = 1;
1143         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1144                     "BS_%d : mgmt_open_connection Success\n");
1145
1146         pci_free_consistent(phba->ctrl.pdev, nonemb_cmd.size,
1147                             nonemb_cmd.va, nonemb_cmd.dma);
1148         return 0;
1149 }
1150
1151 /**
1152  * beiscsi_ep_connect - Ask chip to create TCP Conn
1153  * @scsi_host: Pointer to scsi_host structure
1154  * @dst_addr: The IP address of Target
1155  * @non_blocking: blocking or non-blocking call
1156  *
1157  * This routines first asks chip to create a connection and then allocates an EP
1158  */
1159 struct iscsi_endpoint *
1160 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1161                    int non_blocking)
1162 {
1163         struct beiscsi_hba *phba;
1164         struct beiscsi_endpoint *beiscsi_ep;
1165         struct iscsi_endpoint *ep;
1166         int ret;
1167
1168         if (shost)
1169                 phba = iscsi_host_priv(shost);
1170         else {
1171                 ret = -ENXIO;
1172                 printk(KERN_ERR
1173                        "beiscsi_ep_connect shost is NULL\n");
1174                 return ERR_PTR(ret);
1175         }
1176
1177         if (beiscsi_error(phba)) {
1178                 ret = -EIO;
1179                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1180                             "BS_%d : The FW state Not Stable!!!\n");
1181                 return ERR_PTR(ret);
1182         }
1183
1184         if (phba->state & BE_ADAPTER_PCI_ERR) {
1185                 ret = -EBUSY;
1186                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1187                             "BS_%d : In PCI_ERROR Recovery\n");
1188                 return ERR_PTR(ret);
1189         } else if (phba->state & BE_ADAPTER_LINK_DOWN) {
1190                 ret = -EBUSY;
1191                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1192                             "BS_%d : The Adapter Port state is Down!!!\n");
1193                 return ERR_PTR(ret);
1194         }
1195
1196         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1197         if (!ep) {
1198                 ret = -ENOMEM;
1199                 return ERR_PTR(ret);
1200         }
1201
1202         beiscsi_ep = ep->dd_data;
1203         beiscsi_ep->phba = phba;
1204         beiscsi_ep->openiscsi_ep = ep;
1205         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1206         if (ret) {
1207                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1208                             "BS_%d : Failed in beiscsi_open_conn\n");
1209                 goto free_ep;
1210         }
1211
1212         return ep;
1213
1214 free_ep:
1215         iscsi_destroy_endpoint(ep);
1216         return ERR_PTR(ret);
1217 }
1218
1219 /**
1220  * beiscsi_ep_poll - Poll to see if connection is established
1221  * @ep: endpoint to be used
1222  * @timeout_ms: timeout specified in millisecs
1223  *
1224  * Poll to see if TCP connection established
1225  */
1226 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1227 {
1228         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1229
1230         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1231                     "BS_%d : In  beiscsi_ep_poll\n");
1232
1233         if (beiscsi_ep->cid_vld == 1)
1234                 return 1;
1235         else
1236                 return 0;
1237 }
1238
1239 /**
1240  * beiscsi_flush_cq()- Flush the CQ created.
1241  * @phba: ptr device priv structure.
1242  *
1243  * Before the connection resource are freed flush
1244  * all the CQ enteries
1245  **/
1246 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1247 {
1248         uint16_t i;
1249         struct be_eq_obj *pbe_eq;
1250         struct hwi_controller *phwi_ctrlr;
1251         struct hwi_context_memory *phwi_context;
1252
1253         phwi_ctrlr = phba->phwi_ctrlr;
1254         phwi_context = phwi_ctrlr->phwi_ctxt;
1255
1256         for (i = 0; i < phba->num_cpus; i++) {
1257                 pbe_eq = &phwi_context->be_eq[i];
1258                 irq_poll_disable(&pbe_eq->iopoll);
1259                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1260                 irq_poll_enable(&pbe_eq->iopoll);
1261         }
1262 }
1263
1264 /**
1265  * beiscsi_close_conn - Upload the  connection
1266  * @ep: The iscsi endpoint
1267  * @flag: The type of connection closure
1268  */
1269 static int beiscsi_close_conn(struct  beiscsi_endpoint *beiscsi_ep, int flag)
1270 {
1271         int ret = 0;
1272         unsigned int tag;
1273         struct beiscsi_hba *phba = beiscsi_ep->phba;
1274
1275         tag = mgmt_upload_connection(phba, beiscsi_ep->ep_cid, flag);
1276         if (!tag) {
1277                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1278                             "BS_%d : upload failed for cid 0x%x\n",
1279                             beiscsi_ep->ep_cid);
1280
1281                 ret = -EAGAIN;
1282         }
1283
1284         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1285
1286         /* Flush the CQ entries */
1287         beiscsi_flush_cq(phba);
1288
1289         return ret;
1290 }
1291
1292 /**
1293  * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table
1294  * @phba: The phba instance
1295  * @cid: The cid to free
1296  */
1297 static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba,
1298                                       unsigned int cid)
1299 {
1300         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
1301
1302         if (phba->conn_table[cri_index])
1303                 phba->conn_table[cri_index] = NULL;
1304         else {
1305                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1306                             "BS_%d : Connection table Not occupied.\n");
1307                 return -EINVAL;
1308         }
1309         return 0;
1310 }
1311
1312 /**
1313  * beiscsi_ep_disconnect - Tears down the TCP connection
1314  * @ep: endpoint to be used
1315  *
1316  * Tears down the TCP connection
1317  */
1318 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1319 {
1320         struct beiscsi_conn *beiscsi_conn;
1321         struct beiscsi_endpoint *beiscsi_ep;
1322         struct beiscsi_hba *phba;
1323         unsigned int tag;
1324         uint8_t mgmt_invalidate_flag, tcp_upload_flag;
1325         unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH;
1326
1327         beiscsi_ep = ep->dd_data;
1328         phba = beiscsi_ep->phba;
1329         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1330                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %d\n",
1331                     beiscsi_ep->ep_cid);
1332
1333         if (beiscsi_ep->conn) {
1334                 beiscsi_conn = beiscsi_ep->conn;
1335                 iscsi_suspend_queue(beiscsi_conn->conn);
1336                 mgmt_invalidate_flag = ~BEISCSI_NO_RST_ISSUE;
1337                 tcp_upload_flag = CONNECTION_UPLOAD_GRACEFUL;
1338         } else {
1339                 mgmt_invalidate_flag = BEISCSI_NO_RST_ISSUE;
1340                 tcp_upload_flag = CONNECTION_UPLOAD_ABORT;
1341         }
1342
1343         if (phba->state & BE_ADAPTER_PCI_ERR) {
1344                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1345                             "BS_%d : PCI_ERROR Recovery\n");
1346                 goto free_ep;
1347         }
1348
1349         tag = mgmt_invalidate_connection(phba, beiscsi_ep,
1350                                           beiscsi_ep->ep_cid,
1351                                           mgmt_invalidate_flag,
1352                                           savecfg_flag);
1353         if (!tag) {
1354                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1355                             "BS_%d : mgmt_invalidate_connection Failed for cid=%d\n",
1356                             beiscsi_ep->ep_cid);
1357         }
1358
1359         beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1360         beiscsi_close_conn(beiscsi_ep, tcp_upload_flag);
1361 free_ep:
1362         msleep(BEISCSI_LOGOUT_SYNC_DELAY);
1363         beiscsi_free_ep(beiscsi_ep);
1364         beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid);
1365         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1366 }
1367
1368 umode_t beiscsi_attr_is_visible(int param_type, int param)
1369 {
1370         switch (param_type) {
1371         case ISCSI_NET_PARAM:
1372                 switch (param) {
1373                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1374                 case ISCSI_NET_PARAM_IPV4_ADDR:
1375                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1376                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1377                 case ISCSI_NET_PARAM_IPV4_GW:
1378                 case ISCSI_NET_PARAM_IPV6_ADDR:
1379                 case ISCSI_NET_PARAM_VLAN_ID:
1380                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1381                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1382                         return S_IRUGO;
1383                 default:
1384                         return 0;
1385                 }
1386         case ISCSI_HOST_PARAM:
1387                 switch (param) {
1388                 case ISCSI_HOST_PARAM_HWADDRESS:
1389                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1390                 case ISCSI_HOST_PARAM_PORT_STATE:
1391                 case ISCSI_HOST_PARAM_PORT_SPEED:
1392                         return S_IRUGO;
1393                 default:
1394                         return 0;
1395                 }
1396         case ISCSI_PARAM:
1397                 switch (param) {
1398                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1399                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1400                 case ISCSI_PARAM_HDRDGST_EN:
1401                 case ISCSI_PARAM_DATADGST_EN:
1402                 case ISCSI_PARAM_CONN_ADDRESS:
1403                 case ISCSI_PARAM_CONN_PORT:
1404                 case ISCSI_PARAM_EXP_STATSN:
1405                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1406                 case ISCSI_PARAM_PERSISTENT_PORT:
1407                 case ISCSI_PARAM_PING_TMO:
1408                 case ISCSI_PARAM_RECV_TMO:
1409                 case ISCSI_PARAM_INITIAL_R2T_EN:
1410                 case ISCSI_PARAM_MAX_R2T:
1411                 case ISCSI_PARAM_IMM_DATA_EN:
1412                 case ISCSI_PARAM_FIRST_BURST:
1413                 case ISCSI_PARAM_MAX_BURST:
1414                 case ISCSI_PARAM_PDU_INORDER_EN:
1415                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1416                 case ISCSI_PARAM_ERL:
1417                 case ISCSI_PARAM_TARGET_NAME:
1418                 case ISCSI_PARAM_TPGT:
1419                 case ISCSI_PARAM_USERNAME:
1420                 case ISCSI_PARAM_PASSWORD:
1421                 case ISCSI_PARAM_USERNAME_IN:
1422                 case ISCSI_PARAM_PASSWORD_IN:
1423                 case ISCSI_PARAM_FAST_ABORT:
1424                 case ISCSI_PARAM_ABORT_TMO:
1425                 case ISCSI_PARAM_LU_RESET_TMO:
1426                 case ISCSI_PARAM_IFACE_NAME:
1427                 case ISCSI_PARAM_INITIATOR_NAME:
1428                         return S_IRUGO;
1429                 default:
1430                         return 0;
1431                 }
1432         }
1433
1434         return 0;
1435 }