drivers/scsi/be2iscsi/be_iscsi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This file is part of the Emulex Linux Device Driver for Enterprise iSCSI
   4  * Host Bus Adapters. Refer to the README file included with this package
   5  * for driver version and adapter compatibility.
   6  *
   7  * Copyright (c) 2018 Broadcom. All Rights Reserved.
   8  * The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries.
   9  *
  10  * Contact Information:
  11  * linux-drivers@broadcom.com
  12  */
  13
  14 #include <scsi/libiscsi.h>
  15 #include <scsi/scsi_transport_iscsi.h>
  16 #include <scsi/scsi_transport.h>
  17 #include <scsi/scsi_cmnd.h>
  18 #include <scsi/scsi_device.h>
  19 #include <scsi/scsi_host.h>
  20 #include <scsi/scsi_netlink.h>
  21 #include <net/netlink.h>
  22 #include <scsi/scsi.h>
  23
  24 #include "be_iscsi.h"
  25
  26 extern struct iscsi_transport beiscsi_iscsi_transport;
  27
  28 /**
  29  * beiscsi_session_create - creates a new iscsi session
  30  * @ep: pointer to iscsi ep
  31  * @cmds_max: max commands supported
  32  * @qdepth: max queue depth supported
  33  * @initial_cmdsn: initial iscsi CMDSN
  34  */
  35 struct iscsi_cls_session *beiscsi_session_create(struct iscsi_endpoint *ep,
  36                                                  u16 cmds_max,
  37                                                  u16 qdepth,
  38                                                  u32 initial_cmdsn)
  39 {
  40         struct Scsi_Host *shost;
  41         struct beiscsi_endpoint *beiscsi_ep;
  42         struct iscsi_cls_session *cls_session;
  43         struct beiscsi_hba *phba;
  44         struct iscsi_session *sess;
  45         struct beiscsi_session *beiscsi_sess;
  46         struct beiscsi_io_task *io_task;
  47
  48
  49         if (!ep) {
  50                 pr_err("beiscsi_session_create: invalid ep\n");
  51                 return NULL;
  52         }
  53         beiscsi_ep = ep->dd_data;
  54         phba = beiscsi_ep->phba;
  55
  56         if (!beiscsi_hba_is_online(phba)) {
  57                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  58                             "BS_%d : HBA in error 0x%lx\n", phba->state);
  59                 return NULL;
  60         }
  61
  62         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
  63                     "BS_%d : In beiscsi_session_create\n");
  64         if (cmds_max > beiscsi_ep->phba->params.wrbs_per_cxn) {
  65                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
  66                             "BS_%d : Cannot handle %d cmds."
  67                             "Max cmds per session supported is %d. Using %d."
  68                             "\n", cmds_max,
  69                             beiscsi_ep->phba->params.wrbs_per_cxn,
  70                             beiscsi_ep->phba->params.wrbs_per_cxn);
  71
  72                 cmds_max = beiscsi_ep->phba->params.wrbs_per_cxn;
  73         }
  74
  75         shost = phba->shost;
  76         cls_session = iscsi_session_setup(&beiscsi_iscsi_transport,
  77                                           shost, cmds_max,
  78                                           sizeof(*beiscsi_sess),
  79                                           sizeof(*io_task),
  80                                           initial_cmdsn, ISCSI_MAX_TARGET);
  81         if (!cls_session)
  82                 return NULL;
  83         sess = cls_session->dd_data;
  84         beiscsi_sess = sess->dd_data;
  85         beiscsi_sess->bhs_pool =  dma_pool_create("beiscsi_bhs_pool",
  86                                                    &phba->pcidev->dev,
  87                                                    sizeof(struct be_cmd_bhs),
  88                                                    64, 0);
  89         if (!beiscsi_sess->bhs_pool)
  90                 goto destroy_sess;
  91
  92         return cls_session;
  93 destroy_sess:
  94         iscsi_session_teardown(cls_session);
  95         return NULL;
  96 }
  97
  98 /**
  99  * beiscsi_session_destroy - destroys iscsi session
 100  * @cls_session:        pointer to iscsi cls session
 101  *
 102  * Destroys iSCSI session instance and releases
 103  * resources allocated for it.
 104  */
 105 void beiscsi_session_destroy(struct iscsi_cls_session *cls_session)
 106 {
 107         struct iscsi_session *sess = cls_session->dd_data;
 108         struct beiscsi_session *beiscsi_sess = sess->dd_data;
 109
 110         printk(KERN_INFO "In beiscsi_session_destroy\n");
 111         dma_pool_destroy(beiscsi_sess->bhs_pool);
 112         iscsi_session_teardown(cls_session);
 113 }
 114
 115 /**
 116  * beiscsi_session_fail(): Closing session with appropriate error
 117  * @cls_session: ptr to session
 118  **/
 119 void beiscsi_session_fail(struct iscsi_cls_session *cls_session)
 120 {
 121         iscsi_session_failure(cls_session->dd_data, ISCSI_ERR_CONN_FAILED);
 122 }
 123
 124
 125 /**
 126  * beiscsi_conn_create - create an instance of iscsi connection
 127  * @cls_session: ptr to iscsi_cls_session
 128  * @cid: iscsi cid
 129  */
 130 struct iscsi_cls_conn *
 131 beiscsi_conn_create(struct iscsi_cls_session *cls_session, u32 cid)
 132 {
 133         struct beiscsi_hba *phba;
 134         struct Scsi_Host *shost;
 135         struct iscsi_cls_conn *cls_conn;
 136         struct beiscsi_conn *beiscsi_conn;
 137         struct iscsi_conn *conn;
 138         struct iscsi_session *sess;
 139         struct beiscsi_session *beiscsi_sess;
 140
 141         shost = iscsi_session_to_shost(cls_session);
 142         phba = iscsi_host_priv(shost);
 143
 144         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 145                     "BS_%d : In beiscsi_conn_create ,cid"
 146                     "from iscsi layer=%d\n", cid);
 147
 148         cls_conn = iscsi_conn_setup(cls_session, sizeof(*beiscsi_conn), cid);
 149         if (!cls_conn)
 150                 return NULL;
 151
 152         conn = cls_conn->dd_data;
 153         beiscsi_conn = conn->dd_data;
 154         beiscsi_conn->ep = NULL;
 155         beiscsi_conn->phba = phba;
 156         beiscsi_conn->conn = conn;
 157         sess = cls_session->dd_data;
 158         beiscsi_sess = sess->dd_data;
 159         beiscsi_conn->beiscsi_sess = beiscsi_sess;
 160         return cls_conn;
 161 }
 162
 163 /**
 164  * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
 165  * @cls_session: pointer to iscsi cls session
 166  * @cls_conn: pointer to iscsi cls conn
 167  * @transport_fd: EP handle(64 bit)
 168  * @is_leading: indicate if this is the session leading connection (MCS)
 169  *
 170  * This function binds the TCP Conn with iSCSI Connection and Session.
 171  */
 172 int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
 173                       struct iscsi_cls_conn *cls_conn,
 174                       u64 transport_fd, int is_leading)
 175 {
 176         struct iscsi_conn *conn = cls_conn->dd_data;
 177         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 178         struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
 179         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 180         struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
 181         struct hwi_wrb_context *pwrb_context;
 182         struct beiscsi_endpoint *beiscsi_ep;
 183         struct iscsi_endpoint *ep;
 184         uint16_t cri_index;
 185         int rc = 0;
 186
 187         ep = iscsi_lookup_endpoint(transport_fd);
 188         if (!ep)
 189                 return -EINVAL;
 190
 191         beiscsi_ep = ep->dd_data;
 192
 193         if (iscsi_conn_bind(cls_session, cls_conn, is_leading)) {
 194                 rc = -EINVAL;
 195                 goto put_ep;
 196         }
 197
 198         if (beiscsi_ep->phba != phba) {
 199                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 200                             "BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
 201                             beiscsi_ep->phba, phba);
 202                 rc = -EEXIST;
 203                 goto put_ep;
 204         }
 205         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
 206         if (phba->conn_table[cri_index]) {
 207                 if (beiscsi_conn != phba->conn_table[cri_index] ||
 208                     beiscsi_ep != phba->conn_table[cri_index]->ep) {
 209                         __beiscsi_log(phba, KERN_ERR,
 210                                       "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
 211                                       cri_index,
 212                                       beiscsi_ep->ep_cid,
 213                                       beiscsi_conn,
 214                                       phba->conn_table[cri_index]);
 215                         rc = -EINVAL;
 216                         goto put_ep;
 217                 }
 218         }
 219
 220         beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
 221         beiscsi_conn->ep = beiscsi_ep;
 222         beiscsi_ep->conn = beiscsi_conn;
 223         /**
 224          * Each connection is associated with a WRBQ kept in wrb_context.
 225          * Store doorbell offset for transmit path.
 226          */
 227         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 228         beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
 229         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 230                     "BS_%d : cid %d phba->conn_table[%u]=%p\n",
 231                     beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
 232         phba->conn_table[cri_index] = beiscsi_conn;
 233
 234 put_ep:
 235         iscsi_put_endpoint(ep);
 236         return rc;
 237 }
 238
 239 static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba)
 240 {
 241         if (phba->ipv4_iface)
 242                 return 0;
 243
 244         phba->ipv4_iface = iscsi_create_iface(phba->shost,
 245                                               &beiscsi_iscsi_transport,
 246                                               ISCSI_IFACE_TYPE_IPV4,
 247                                               0, 0);
 248         if (!phba->ipv4_iface) {
 249                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 250                             "BS_%d : Could not "
 251                             "create default IPv4 address.\n");
 252                 return -ENODEV;
 253         }
 254
 255         return 0;
 256 }
 257
 258 static int beiscsi_iface_create_ipv6(struct beiscsi_hba *phba)
 259 {
 260         if (phba->ipv6_iface)
 261                 return 0;
 262
 263         phba->ipv6_iface = iscsi_create_iface(phba->shost,
 264                                               &beiscsi_iscsi_transport,
 265                                               ISCSI_IFACE_TYPE_IPV6,
 266                                               0, 0);
 267         if (!phba->ipv6_iface) {
 268                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 269                             "BS_%d : Could not "
 270                             "create default IPv6 address.\n");
 271                 return -ENODEV;
 272         }
 273
 274         return 0;
 275 }
 276
 277 void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 278 {
 279         struct be_cmd_get_if_info_resp *if_info;
 280
 281         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 282                 beiscsi_iface_create_ipv4(phba);
 283                 kfree(if_info);
 284         }
 285
 286         if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 287                 beiscsi_iface_create_ipv6(phba);
 288                 kfree(if_info);
 289         }
 290 }
 291
 292 void beiscsi_iface_destroy_default(struct beiscsi_hba *phba)
 293 {
 294         if (phba->ipv6_iface) {
 295                 iscsi_destroy_iface(phba->ipv6_iface);
 296                 phba->ipv6_iface = NULL;
 297         }
 298         if (phba->ipv4_iface) {
 299                 iscsi_destroy_iface(phba->ipv4_iface);
 300                 phba->ipv4_iface = NULL;
 301         }
 302 }
 303
 304 /**
 305  * beiscsi_iface_config_vlan()- Set the VLAN TAG
 306  * @shost: Scsi Host for the driver instance
 307  * @iface_param: Interface paramters
 308  *
 309  * Set the VLAN TAG for the adapter or disable
 310  * the VLAN config
 311  *
 312  * returns
 313  *      Success: 0
 314  *      Failure: Non-Zero Value
 315  **/
 316 static int
 317 beiscsi_iface_config_vlan(struct Scsi_Host *shost,
 318                           struct iscsi_iface_param_info *iface_param)
 319 {
 320         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 321         int ret = -EPERM;
 322
 323         switch (iface_param->param) {
 324         case ISCSI_NET_PARAM_VLAN_ENABLED:
 325                 ret = 0;
 326                 if (iface_param->value[0] != ISCSI_VLAN_ENABLE)
 327                         ret = beiscsi_if_set_vlan(phba, BEISCSI_VLAN_DISABLE);
 328                 break;
 329         case ISCSI_NET_PARAM_VLAN_TAG:
 330                 ret = beiscsi_if_set_vlan(phba,
 331                                           *((uint16_t *)iface_param->value));
 332                 break;
 333         }
 334         return ret;
 335 }
 336
 337
 338 static int
 339 beiscsi_iface_config_ipv4(struct Scsi_Host *shost,
 340                           struct iscsi_iface_param_info *info,
 341                           void *data, uint32_t dt_len)
 342 {
 343         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 344         u8 *ip = NULL, *subnet = NULL, *gw;
 345         struct nlattr *nla;
 346         int ret = -EPERM;
 347
 348         /* Check the param */
 349         switch (info->param) {
 350         case ISCSI_NET_PARAM_IFACE_ENABLE:
 351                 if (info->value[0] == ISCSI_IFACE_ENABLE)
 352                         ret = beiscsi_iface_create_ipv4(phba);
 353                 else {
 354                         iscsi_destroy_iface(phba->ipv4_iface);
 355                         phba->ipv4_iface = NULL;
 356                 }
 357                 break;
 358         case ISCSI_NET_PARAM_IPV4_GW:
 359                 gw = info->value;
 360                 ret = beiscsi_if_set_gw(phba, BEISCSI_IP_TYPE_V4, gw);
 361                 break;
 362         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 363                 if (info->value[0] == ISCSI_BOOTPROTO_DHCP)
 364                         ret = beiscsi_if_en_dhcp(phba, BEISCSI_IP_TYPE_V4);
 365                 else if (info->value[0] == ISCSI_BOOTPROTO_STATIC)
 366                         /* release DHCP IP address */
 367                         ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 368                                                    NULL, NULL);
 369                 else
 370                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 371                                     "BS_%d : Invalid BOOTPROTO: %d\n",
 372                                     info->value[0]);
 373                 break;
 374         case ISCSI_NET_PARAM_IPV4_ADDR:
 375                 ip = info->value;
 376                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_SUBNET);
 377                 if (nla) {
 378                         info = nla_data(nla);
 379                         subnet = info->value;
 380                 }
 381                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 382                                            ip, subnet);
 383                 break;
 384         case ISCSI_NET_PARAM_IPV4_SUBNET:
 385                 /*
 386                  * OPCODE_COMMON_ISCSI_NTWK_MODIFY_IP_ADDR ioctl needs IP
 387                  * and subnet both. Find IP to be applied for this subnet.
 388                  */
 389                 subnet = info->value;
 390                 nla = nla_find(data, dt_len, ISCSI_NET_PARAM_IPV4_ADDR);
 391                 if (nla) {
 392                         info = nla_data(nla);
 393                         ip = info->value;
 394                 }
 395                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V4,
 396                                            ip, subnet);
 397                 break;
 398         }
 399
 400         return ret;
 401 }
 402
 403 static int
 404 beiscsi_iface_config_ipv6(struct Scsi_Host *shost,
 405                           struct iscsi_iface_param_info *iface_param,
 406                           void *data, uint32_t dt_len)
 407 {
 408         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 409         int ret = -EPERM;
 410
 411         switch (iface_param->param) {
 412         case ISCSI_NET_PARAM_IFACE_ENABLE:
 413                 if (iface_param->value[0] == ISCSI_IFACE_ENABLE)
 414                         ret = beiscsi_iface_create_ipv6(phba);
 415                 else {
 416                         iscsi_destroy_iface(phba->ipv6_iface);
 417                         phba->ipv6_iface = NULL;
 418                 }
 419                 break;
 420         case ISCSI_NET_PARAM_IPV6_ADDR:
 421                 ret = beiscsi_if_en_static(phba, BEISCSI_IP_TYPE_V6,
 422                                            iface_param->value, NULL);
 423                 break;
 424         }
 425
 426         return ret;
 427 }
 428
 429 int beiscsi_iface_set_param(struct Scsi_Host *shost,
 430                             void *data, uint32_t dt_len)
 431 {
 432         struct iscsi_iface_param_info *iface_param = NULL;
 433         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 434         struct nlattr *attrib;
 435         uint32_t rm_len = dt_len;
 436         int ret;
 437
 438         if (!beiscsi_hba_is_online(phba)) {
 439                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 440                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 441                 return -EBUSY;
 442         }
 443
 444         /* update interface_handle */
 445         ret = beiscsi_if_get_handle(phba);
 446         if (ret) {
 447                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 448                             "BS_%d : Getting Interface Handle Failed\n");
 449                 return ret;
 450         }
 451
 452         nla_for_each_attr(attrib, data, dt_len, rm_len) {
 453                 /* ignore nla_type as it is never used */
 454                 if (nla_len(attrib) < sizeof(*iface_param))
 455                         return -EINVAL;
 456
 457                 iface_param = nla_data(attrib);
 458
 459                 if (iface_param->param_type != ISCSI_NET_PARAM)
 460                         continue;
 461
 462                 /*
 463                  * BE2ISCSI only supports 1 interface
 464                  */
 465                 if (iface_param->iface_num) {
 466                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 467                                     "BS_%d : Invalid iface_num %d."
 468                                     "Only iface_num 0 is supported.\n",
 469                                     iface_param->iface_num);
 470
 471                         return -EINVAL;
 472                 }
 473
 474                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 475                             "BS_%d : %s.0 set param %d",
 476                             (iface_param->iface_type == ISCSI_IFACE_TYPE_IPV4) ?
 477                             "ipv4" : "ipv6", iface_param->param);
 478
 479                 ret = -EPERM;
 480                 switch (iface_param->param) {
 481                 case ISCSI_NET_PARAM_VLAN_ENABLED:
 482                 case ISCSI_NET_PARAM_VLAN_TAG:
 483                         ret = beiscsi_iface_config_vlan(shost, iface_param);
 484                         break;
 485                 default:
 486                         switch (iface_param->iface_type) {
 487                         case ISCSI_IFACE_TYPE_IPV4:
 488                                 ret = beiscsi_iface_config_ipv4(shost,
 489                                                                 iface_param,
 490                                                                 data, dt_len);
 491                                 break;
 492                         case ISCSI_IFACE_TYPE_IPV6:
 493                                 ret = beiscsi_iface_config_ipv6(shost,
 494                                                                 iface_param,
 495                                                                 data, dt_len);
 496                                 break;
 497                         }
 498                 }
 499
 500                 if (ret == -EPERM) {
 501                         __beiscsi_log(phba, KERN_ERR,
 502                                       "BS_%d : %s.0 set param %d not permitted",
 503                                       (iface_param->iface_type ==
 504                                        ISCSI_IFACE_TYPE_IPV4) ? "ipv4" : "ipv6",
 505                                       iface_param->param);
 506                         ret = 0;
 507                 }
 508                 if (ret)
 509                         break;
 510         }
 511
 512         return ret;
 513 }
 514
 515 static int __beiscsi_iface_get_param(struct beiscsi_hba *phba,
 516                                      struct iscsi_iface *iface,
 517                                      int param, char *buf)
 518 {
 519         struct be_cmd_get_if_info_resp *if_info;
 520         int len, ip_type = BEISCSI_IP_TYPE_V4;
 521
 522         if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 523                 ip_type = BEISCSI_IP_TYPE_V6;
 524
 525         len = beiscsi_if_get_info(phba, ip_type, &if_info);
 526         if (len)
 527                 return len;
 528
 529         switch (param) {
 530         case ISCSI_NET_PARAM_IPV4_ADDR:
 531                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.addr);
 532                 break;
 533         case ISCSI_NET_PARAM_IPV6_ADDR:
 534                 len = sprintf(buf, "%pI6\n", if_info->ip_addr.addr);
 535                 break;
 536         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 537                 if (!if_info->dhcp_state)
 538                         len = sprintf(buf, "static\n");
 539                 else
 540                         len = sprintf(buf, "dhcp\n");
 541                 break;
 542         case ISCSI_NET_PARAM_IPV4_SUBNET:
 543                 len = sprintf(buf, "%pI4\n", if_info->ip_addr.subnet_mask);
 544                 break;
 545         case ISCSI_NET_PARAM_VLAN_ENABLED:
 546                 len = sprintf(buf, "%s\n",
 547                               (if_info->vlan_priority == BEISCSI_VLAN_DISABLE) ?
 548                               "disable" : "enable");
 549                 break;
 550         case ISCSI_NET_PARAM_VLAN_ID:
 551                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 552                         len = -EINVAL;
 553                 else
 554                         len = sprintf(buf, "%d\n",
 555                                       (if_info->vlan_priority &
 556                                        ISCSI_MAX_VLAN_ID));
 557                 break;
 558         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 559                 if (if_info->vlan_priority == BEISCSI_VLAN_DISABLE)
 560                         len = -EINVAL;
 561                 else
 562                         len = sprintf(buf, "%d\n",
 563                                       ((if_info->vlan_priority >> 13) &
 564                                        ISCSI_MAX_VLAN_PRIORITY));
 565                 break;
 566         default:
 567                 WARN_ON(1);
 568         }
 569
 570         kfree(if_info);
 571         return len;
 572 }
 573
 574 int beiscsi_iface_get_param(struct iscsi_iface *iface,
 575                             enum iscsi_param_type param_type,
 576                             int param, char *buf)
 577 {
 578         struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
 579         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 580         struct be_cmd_get_def_gateway_resp gateway;
 581         int len = -EPERM;
 582
 583         if (param_type != ISCSI_NET_PARAM)
 584                 return 0;
 585         if (!beiscsi_hba_is_online(phba)) {
 586                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 587                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 588                 return -EBUSY;
 589         }
 590
 591         switch (param) {
 592         case ISCSI_NET_PARAM_IPV4_ADDR:
 593         case ISCSI_NET_PARAM_IPV4_SUBNET:
 594         case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
 595         case ISCSI_NET_PARAM_IPV6_ADDR:
 596         case ISCSI_NET_PARAM_VLAN_ENABLED:
 597         case ISCSI_NET_PARAM_VLAN_ID:
 598         case ISCSI_NET_PARAM_VLAN_PRIORITY:
 599                 len = __beiscsi_iface_get_param(phba, iface, param, buf);
 600                 break;
 601         case ISCSI_NET_PARAM_IFACE_ENABLE:
 602                 if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4)
 603                         len = sprintf(buf, "%s\n",
 604                                       phba->ipv4_iface ? "enable" : "disable");
 605                 else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6)
 606                         len = sprintf(buf, "%s\n",
 607                                       phba->ipv6_iface ? "enable" : "disable");
 608                 break;
 609         case ISCSI_NET_PARAM_IPV4_GW:
 610                 memset(&gateway, 0, sizeof(gateway));
 611                 len = beiscsi_if_get_gw(phba, BEISCSI_IP_TYPE_V4, &gateway);
 612                 if (!len)
 613                         len = sprintf(buf, "%pI4\n", &gateway.ip_addr.addr);
 614                 break;
 615         }
 616
 617         return len;
 618 }
 619
 620 /**
 621  * beiscsi_ep_get_param - get the iscsi parameter
 622  * @ep: pointer to iscsi ep
 623  * @param: parameter type identifier
 624  * @buf: buffer pointer
 625  *
 626  * returns iscsi parameter
 627  */
 628 int beiscsi_ep_get_param(struct iscsi_endpoint *ep,
 629                            enum iscsi_param param, char *buf)
 630 {
 631         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
 632         int len;
 633
 634         beiscsi_log(beiscsi_ep->phba, KERN_INFO,
 635                     BEISCSI_LOG_CONFIG,
 636                     "BS_%d : In beiscsi_ep_get_param,"
 637                     " param= %d\n", param);
 638
 639         switch (param) {
 640         case ISCSI_PARAM_CONN_PORT:
 641                 len = sprintf(buf, "%hu\n", beiscsi_ep->dst_tcpport);
 642                 break;
 643         case ISCSI_PARAM_CONN_ADDRESS:
 644                 if (beiscsi_ep->ip_type == BEISCSI_IP_TYPE_V4)
 645                         len = sprintf(buf, "%pI4\n", &beiscsi_ep->dst_addr);
 646                 else
 647                         len = sprintf(buf, "%pI6\n", &beiscsi_ep->dst6_addr);
 648                 break;
 649         default:
 650                 len = -EPERM;
 651         }
 652         return len;
 653 }
 654
 655 int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 656                       enum iscsi_param param, char *buf, int buflen)
 657 {
 658         struct iscsi_conn *conn = cls_conn->dd_data;
 659         struct iscsi_session *session = conn->session;
 660         struct beiscsi_hba *phba = NULL;
 661         int ret;
 662
 663         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 664         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 665                     "BS_%d : In beiscsi_conn_set_param,"
 666                     " param= %d\n", param);
 667
 668         ret = iscsi_set_param(cls_conn, param, buf, buflen);
 669         if (ret)
 670                 return ret;
 671         /*
 672          * If userspace tried to set the value to higher than we can
 673          * support override here.
 674          */
 675         switch (param) {
 676         case ISCSI_PARAM_FIRST_BURST:
 677                 if (session->first_burst > 8192)
 678                         session->first_burst = 8192;
 679                 break;
 680         case ISCSI_PARAM_MAX_RECV_DLENGTH:
 681                 if (conn->max_recv_dlength > 65536)
 682                         conn->max_recv_dlength = 65536;
 683                 break;
 684         case ISCSI_PARAM_MAX_BURST:
 685                 if (session->max_burst > 262144)
 686                         session->max_burst = 262144;
 687                 break;
 688         case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 689                 if (conn->max_xmit_dlength > 65536)
 690                         conn->max_xmit_dlength = 65536;
 691                 fallthrough;
 692         default:
 693                 return 0;
 694         }
 695
 696         return 0;
 697 }
 698
 699 /**
 700  * beiscsi_get_port_state - Get the Port State
 701  * @shost : pointer to scsi_host structure
 702  *
 703  */
 704 static void beiscsi_get_port_state(struct Scsi_Host *shost)
 705 {
 706         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 707         struct iscsi_cls_host *ihost = shost->shost_data;
 708
 709         ihost->port_state = test_bit(BEISCSI_HBA_LINK_UP, &phba->state) ?
 710                 ISCSI_PORT_STATE_UP : ISCSI_PORT_STATE_DOWN;
 711 }
 712
 713 /**
 714  * beiscsi_get_port_speed  - Get the Port Speed from Adapter
 715  * @shost : pointer to scsi_host structure
 716  *
 717  */
 718 static void beiscsi_get_port_speed(struct Scsi_Host *shost)
 719 {
 720         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 721         struct iscsi_cls_host *ihost = shost->shost_data;
 722
 723         switch (phba->port_speed) {
 724         case BE2ISCSI_LINK_SPEED_10MBPS:
 725                 ihost->port_speed = ISCSI_PORT_SPEED_10MBPS;
 726                 break;
 727         case BE2ISCSI_LINK_SPEED_100MBPS:
 728                 ihost->port_speed = ISCSI_PORT_SPEED_100MBPS;
 729                 break;
 730         case BE2ISCSI_LINK_SPEED_1GBPS:
 731                 ihost->port_speed = ISCSI_PORT_SPEED_1GBPS;
 732                 break;
 733         case BE2ISCSI_LINK_SPEED_10GBPS:
 734                 ihost->port_speed = ISCSI_PORT_SPEED_10GBPS;
 735                 break;
 736         case BE2ISCSI_LINK_SPEED_25GBPS:
 737                 ihost->port_speed = ISCSI_PORT_SPEED_25GBPS;
 738                 break;
 739         case BE2ISCSI_LINK_SPEED_40GBPS:
 740                 ihost->port_speed = ISCSI_PORT_SPEED_40GBPS;
 741                 break;
 742         default:
 743                 ihost->port_speed = ISCSI_PORT_SPEED_UNKNOWN;
 744         }
 745 }
 746
 747 /**
 748  * beiscsi_get_host_param - get the iscsi parameter
 749  * @shost: pointer to scsi_host structure
 750  * @param: parameter type identifier
 751  * @buf: buffer pointer
 752  *
 753  */
 754 int beiscsi_get_host_param(struct Scsi_Host *shost,
 755                            enum iscsi_host_param param, char *buf)
 756 {
 757         struct beiscsi_hba *phba = iscsi_host_priv(shost);
 758         int status = 0;
 759
 760         if (!beiscsi_hba_is_online(phba)) {
 761                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 762                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 763                 return 0;
 764         }
 765         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 766                     "BS_%d : In beiscsi_get_host_param, param = %d\n", param);
 767
 768         switch (param) {
 769         case ISCSI_HOST_PARAM_HWADDRESS:
 770                 status = beiscsi_get_macaddr(buf, phba);
 771                 if (status < 0) {
 772                         beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 773                                     "BS_%d : beiscsi_get_macaddr Failed\n");
 774                         return 0;
 775                 }
 776                 break;
 777         case ISCSI_HOST_PARAM_INITIATOR_NAME:
 778                 /* try fetching user configured name first */
 779                 status = beiscsi_get_initiator_name(phba, buf, true);
 780                 if (status < 0) {
 781                         status = beiscsi_get_initiator_name(phba, buf, false);
 782                         if (status < 0) {
 783                                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
 784                                             "BS_%d : Retrieving Initiator Name Failed\n");
 785                                 status = 0;
 786                         }
 787                 }
 788                 break;
 789         case ISCSI_HOST_PARAM_PORT_STATE:
 790                 beiscsi_get_port_state(shost);
 791                 status = sprintf(buf, "%s\n", iscsi_get_port_state_name(shost));
 792                 break;
 793         case ISCSI_HOST_PARAM_PORT_SPEED:
 794                 beiscsi_get_port_speed(shost);
 795                 status = sprintf(buf, "%s\n", iscsi_get_port_speed_name(shost));
 796                 break;
 797         default:
 798                 return iscsi_host_get_param(shost, param, buf);
 799         }
 800         return status;
 801 }
 802
 803 int beiscsi_get_macaddr(char *buf, struct beiscsi_hba *phba)
 804 {
 805         struct be_cmd_get_nic_conf_resp resp;
 806         int rc;
 807
 808         if (phba->mac_addr_set)
 809                 return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 810
 811         memset(&resp, 0, sizeof(resp));
 812         rc = mgmt_get_nic_conf(phba, &resp);
 813         if (rc)
 814                 return rc;
 815
 816         phba->mac_addr_set = true;
 817         memcpy(phba->mac_address, resp.mac_address, ETH_ALEN);
 818         return sysfs_format_mac(buf, phba->mac_address, ETH_ALEN);
 819 }
 820
 821 /**
 822  * beiscsi_conn_get_stats - get the iscsi stats
 823  * @cls_conn: pointer to iscsi cls conn
 824  * @stats: pointer to iscsi_stats structure
 825  *
 826  * returns iscsi stats
 827  */
 828 void beiscsi_conn_get_stats(struct iscsi_cls_conn *cls_conn,
 829                             struct iscsi_stats *stats)
 830 {
 831         struct iscsi_conn *conn = cls_conn->dd_data;
 832         struct beiscsi_hba *phba = NULL;
 833
 834         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 835         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 836                     "BS_%d : In beiscsi_conn_get_stats\n");
 837
 838         stats->txdata_octets = conn->txdata_octets;
 839         stats->rxdata_octets = conn->rxdata_octets;
 840         stats->dataout_pdus = conn->dataout_pdus_cnt;
 841         stats->scsirsp_pdus = conn->scsirsp_pdus_cnt;
 842         stats->scsicmd_pdus = conn->scsicmd_pdus_cnt;
 843         stats->datain_pdus = conn->datain_pdus_cnt;
 844         stats->tmfrsp_pdus = conn->tmfrsp_pdus_cnt;
 845         stats->tmfcmd_pdus = conn->tmfcmd_pdus_cnt;
 846         stats->r2t_pdus = conn->r2t_pdus_cnt;
 847         stats->digest_err = 0;
 848         stats->timeout_err = 0;
 849         stats->custom_length = 1;
 850         strcpy(stats->custom[0].desc, "eh_abort_cnt");
 851         stats->custom[0].value = conn->eh_abort_cnt;
 852 }
 853
 854 /**
 855  * beiscsi_set_params_for_offld - get the parameters for offload
 856  * @beiscsi_conn: pointer to beiscsi_conn
 857  * @params: pointer to offload_params structure
 858  */
 859 static void  beiscsi_set_params_for_offld(struct beiscsi_conn *beiscsi_conn,
 860                                           struct beiscsi_offload_params *params)
 861 {
 862         struct iscsi_conn *conn = beiscsi_conn->conn;
 863         struct iscsi_session *session = conn->session;
 864
 865         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_burst_length,
 866                       params, session->max_burst);
 867         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 868                       max_send_data_segment_length, params,
 869                       conn->max_xmit_dlength);
 870         AMAP_SET_BITS(struct amap_beiscsi_offload_params, first_burst_length,
 871                       params, session->first_burst);
 872         AMAP_SET_BITS(struct amap_beiscsi_offload_params, erl, params,
 873                       session->erl);
 874         AMAP_SET_BITS(struct amap_beiscsi_offload_params, dde, params,
 875                       conn->datadgst_en);
 876         AMAP_SET_BITS(struct amap_beiscsi_offload_params, hde, params,
 877                       conn->hdrdgst_en);
 878         AMAP_SET_BITS(struct amap_beiscsi_offload_params, ir2t, params,
 879                       session->initial_r2t_en);
 880         AMAP_SET_BITS(struct amap_beiscsi_offload_params, imd, params,
 881                       session->imm_data_en);
 882         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 883                       data_seq_inorder, params,
 884                       session->dataseq_inorder_en);
 885         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 886                       pdu_seq_inorder, params,
 887                       session->pdu_inorder_en);
 888         AMAP_SET_BITS(struct amap_beiscsi_offload_params, max_r2t, params,
 889                       session->max_r2t);
 890         AMAP_SET_BITS(struct amap_beiscsi_offload_params, exp_statsn, params,
 891                       (conn->exp_statsn - 1));
 892         AMAP_SET_BITS(struct amap_beiscsi_offload_params,
 893                       max_recv_data_segment_length, params,
 894                       conn->max_recv_dlength);
 895
 896 }
 897
 898 /**
 899  * beiscsi_conn_start - offload of session to chip
 900  * @cls_conn: pointer to beiscsi_conn
 901  */
 902 int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn)
 903 {
 904         struct iscsi_conn *conn = cls_conn->dd_data;
 905         struct beiscsi_conn *beiscsi_conn = conn->dd_data;
 906         struct beiscsi_endpoint *beiscsi_ep;
 907         struct beiscsi_offload_params params;
 908         struct beiscsi_hba *phba;
 909
 910         phba = ((struct beiscsi_conn *)conn->dd_data)->phba;
 911
 912         if (!beiscsi_hba_is_online(phba)) {
 913                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 914                             "BS_%d : HBA in error 0x%lx\n", phba->state);
 915                 return -EBUSY;
 916         }
 917         beiscsi_log(beiscsi_conn->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
 918                     "BS_%d : In beiscsi_conn_start\n");
 919
 920         memset(&params, 0, sizeof(struct beiscsi_offload_params));
 921         beiscsi_ep = beiscsi_conn->ep;
 922         if (!beiscsi_ep)
 923                 beiscsi_log(beiscsi_conn->phba, KERN_ERR,
 924                             BEISCSI_LOG_CONFIG,
 925                             "BS_%d : In beiscsi_conn_start , no beiscsi_ep\n");
 926
 927         beiscsi_conn->login_in_progress = 0;
 928         beiscsi_set_params_for_offld(beiscsi_conn, &params);
 929         beiscsi_offload_connection(beiscsi_conn, &params);
 930         iscsi_conn_start(cls_conn);
 931         return 0;
 932 }
 933
 934 /**
 935  * beiscsi_get_cid - Allocate a cid
 936  * @phba: The phba instance
 937  */
 938 static int beiscsi_get_cid(struct beiscsi_hba *phba)
 939 {
 940         uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1;
 941         unsigned short cid, cid_from_ulp;
 942         struct ulp_cid_info *cid_info;
 943
 944         /* Find the ULP which has more CID available */
 945         cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ?
 946                           BEISCSI_ULP0_AVLBL_CID(phba) : 0;
 947         cid_avlbl_ulp1 = (phba->cid_array_info[BEISCSI_ULP1]) ?
 948                           BEISCSI_ULP1_AVLBL_CID(phba) : 0;
 949         cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ?
 950                         BEISCSI_ULP0 : BEISCSI_ULP1;
 951         /**
 952          * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp
 953          * is ZERO for both, ULP 1 is returned.
 954          * Check if ULP is loaded before getting new CID.
 955          */
 956         if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported))
 957                 return BE_INVALID_CID;
 958
 959         cid_info = phba->cid_array_info[cid_from_ulp];
 960         cid = cid_info->cid_array[cid_info->cid_alloc];
 961         if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) {
 962                 __beiscsi_log(phba, KERN_ERR,
 963                                 "BS_%d : failed to get cid: available %u:%u\n",
 964                                 cid_info->avlbl_cids, cid_info->cid_free);
 965                 return BE_INVALID_CID;
 966         }
 967         /* empty the slot */
 968         cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID;
 969         if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp))
 970                 cid_info->cid_alloc = 0;
 971         cid_info->avlbl_cids--;
 972         return cid;
 973 }
 974
 975 /**
 976  * beiscsi_put_cid - Free the cid
 977  * @phba: The phba for which the cid is being freed
 978  * @cid: The cid to free
 979  */
 980 static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid)
 981 {
 982         uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
 983         struct hwi_wrb_context *pwrb_context;
 984         struct hwi_controller *phwi_ctrlr;
 985         struct ulp_cid_info *cid_info;
 986         uint16_t cid_post_ulp;
 987
 988         phwi_ctrlr = phba->phwi_ctrlr;
 989         pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
 990         cid_post_ulp = pwrb_context->ulp_num;
 991
 992         cid_info = phba->cid_array_info[cid_post_ulp];
 993         /* fill only in empty slot */
 994         if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) {
 995                 __beiscsi_log(phba, KERN_ERR,
 996                               "BS_%d : failed to put cid %u: available %u:%u\n",
 997                               cid, cid_info->avlbl_cids, cid_info->cid_free);
 998                 return;
 999         }
1000         cid_info->cid_array[cid_info->cid_free++] = cid;
1001         if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp))
1002                 cid_info->cid_free = 0;
1003         cid_info->avlbl_cids++;
1004 }
1005
1006 /**
1007  * beiscsi_free_ep - free endpoint
1008  * @beiscsi_ep: pointer to device endpoint struct
1009  */
1010 static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep)
1011 {
1012         struct beiscsi_hba *phba = beiscsi_ep->phba;
1013         struct beiscsi_conn *beiscsi_conn;
1014
1015         beiscsi_put_cid(phba, beiscsi_ep->ep_cid);
1016         beiscsi_ep->phba = NULL;
1017         /* clear this to track freeing in beiscsi_ep_disconnect */
1018         phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL;
1019
1020         /**
1021          * Check if any connection resource allocated by driver
1022          * is to be freed.This case occurs when target redirection
1023          * or connection retry is done.
1024          **/
1025         if (!beiscsi_ep->conn)
1026                 return;
1027
1028         beiscsi_conn = beiscsi_ep->conn;
1029         /**
1030          * Break ep->conn link here so that completions after
1031          * this are ignored.
1032          */
1033         beiscsi_ep->conn = NULL;
1034         if (beiscsi_conn->login_in_progress) {
1035                 beiscsi_free_mgmt_task_handles(beiscsi_conn,
1036                                                beiscsi_conn->task);
1037                 beiscsi_conn->login_in_progress = 0;
1038         }
1039 }
1040
1041 /**
1042  * beiscsi_open_conn - Ask FW to open a TCP connection
1043  * @ep: pointer to device endpoint struct
1044  * @src_addr: The source IP address
1045  * @dst_addr: The Destination  IP address
1046  * @non_blocking: blocking or non-blocking call
1047  *
1048  * Asks the FW to open a TCP connection
1049  */
1050 static int beiscsi_open_conn(struct iscsi_endpoint *ep,
1051                              struct sockaddr *src_addr,
1052                              struct sockaddr *dst_addr, int non_blocking)
1053 {
1054         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1055         struct beiscsi_hba *phba = beiscsi_ep->phba;
1056         struct tcp_connect_and_offload_out *ptcpcnct_out;
1057         struct be_dma_mem nonemb_cmd;
1058         unsigned int tag, req_memsize;
1059         int ret = -ENOMEM;
1060
1061         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1062                     "BS_%d : In beiscsi_open_conn\n");
1063
1064         beiscsi_ep->ep_cid = beiscsi_get_cid(phba);
1065         if (beiscsi_ep->ep_cid == BE_INVALID_CID) {
1066                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1067                             "BS_%d : No free cid available\n");
1068                 return ret;
1069         }
1070
1071         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1072                     "BS_%d : In beiscsi_open_conn, ep_cid=%d\n",
1073                     beiscsi_ep->ep_cid);
1074
1075         phba->ep_array[BE_GET_CRI_FROM_CID
1076                        (beiscsi_ep->ep_cid)] = ep;
1077
1078         beiscsi_ep->cid_vld = 0;
1079
1080         if (is_chip_be2_be3r(phba))
1081                 req_memsize = sizeof(struct tcp_connect_and_offload_in);
1082         else
1083                 req_memsize = sizeof(struct tcp_connect_and_offload_in_v1);
1084
1085         nonemb_cmd.va = dma_alloc_coherent(&phba->ctrl.pdev->dev,
1086                                 req_memsize,
1087                                 &nonemb_cmd.dma, GFP_KERNEL);
1088         if (nonemb_cmd.va == NULL) {
1089
1090                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1091                             "BS_%d : Failed to allocate memory for"
1092                             " mgmt_open_connection\n");
1093
1094                 beiscsi_free_ep(beiscsi_ep);
1095                 return -ENOMEM;
1096         }
1097         nonemb_cmd.size = req_memsize;
1098         memset(nonemb_cmd.va, 0, nonemb_cmd.size);
1099         tag = mgmt_open_connection(phba, dst_addr, beiscsi_ep, &nonemb_cmd);
1100         if (!tag) {
1101                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1102                             "BS_%d : mgmt_open_connection Failed for cid=%d\n",
1103                             beiscsi_ep->ep_cid);
1104
1105                 dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1106                                     nonemb_cmd.va, nonemb_cmd.dma);
1107                 beiscsi_free_ep(beiscsi_ep);
1108                 return -EAGAIN;
1109         }
1110
1111         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, &nonemb_cmd);
1112         if (ret) {
1113                 beiscsi_log(phba, KERN_ERR,
1114                             BEISCSI_LOG_CONFIG | BEISCSI_LOG_MBOX,
1115                             "BS_%d : mgmt_open_connection Failed");
1116
1117                 if (ret != -EBUSY)
1118                         dma_free_coherent(&phba->ctrl.pdev->dev,
1119                                         nonemb_cmd.size, nonemb_cmd.va,
1120                                         nonemb_cmd.dma);
1121
1122                 beiscsi_free_ep(beiscsi_ep);
1123                 return ret;
1124         }
1125
1126         ptcpcnct_out = (struct tcp_connect_and_offload_out *)nonemb_cmd.va;
1127         beiscsi_ep = ep->dd_data;
1128         beiscsi_ep->fw_handle = ptcpcnct_out->connection_handle;
1129         beiscsi_ep->cid_vld = 1;
1130         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1131                     "BS_%d : mgmt_open_connection Success\n");
1132
1133         dma_free_coherent(&phba->ctrl.pdev->dev, nonemb_cmd.size,
1134                             nonemb_cmd.va, nonemb_cmd.dma);
1135         return 0;
1136 }
1137
1138 /**
1139  * beiscsi_ep_connect - Ask chip to create TCP Conn
1140  * @shost: Pointer to scsi_host structure
1141  * @dst_addr: The IP address of Target
1142  * @non_blocking: blocking or non-blocking call
1143  *
1144  * This routines first asks chip to create a connection and then allocates an EP
1145  */
1146 struct iscsi_endpoint *
1147 beiscsi_ep_connect(struct Scsi_Host *shost, struct sockaddr *dst_addr,
1148                    int non_blocking)
1149 {
1150         struct beiscsi_hba *phba;
1151         struct beiscsi_endpoint *beiscsi_ep;
1152         struct iscsi_endpoint *ep;
1153         int ret;
1154
1155         if (!shost) {
1156                 ret = -ENXIO;
1157                 pr_err("beiscsi_ep_connect shost is NULL\n");
1158                 return ERR_PTR(ret);
1159         }
1160
1161         phba = iscsi_host_priv(shost);
1162         if (!beiscsi_hba_is_online(phba)) {
1163                 ret = -EIO;
1164                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1165                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1166                 return ERR_PTR(ret);
1167         }
1168         if (!test_bit(BEISCSI_HBA_LINK_UP, &phba->state)) {
1169                 ret = -EBUSY;
1170                 beiscsi_log(phba, KERN_WARNING, BEISCSI_LOG_CONFIG,
1171                             "BS_%d : The Adapter Port state is Down!!!\n");
1172                 return ERR_PTR(ret);
1173         }
1174
1175         ep = iscsi_create_endpoint(sizeof(struct beiscsi_endpoint));
1176         if (!ep) {
1177                 ret = -ENOMEM;
1178                 return ERR_PTR(ret);
1179         }
1180
1181         beiscsi_ep = ep->dd_data;
1182         beiscsi_ep->phba = phba;
1183         beiscsi_ep->openiscsi_ep = ep;
1184         ret = beiscsi_open_conn(ep, NULL, dst_addr, non_blocking);
1185         if (ret) {
1186                 beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
1187                             "BS_%d : Failed in beiscsi_open_conn\n");
1188                 goto free_ep;
1189         }
1190
1191         return ep;
1192
1193 free_ep:
1194         iscsi_destroy_endpoint(ep);
1195         return ERR_PTR(ret);
1196 }
1197
1198 /**
1199  * beiscsi_ep_poll - Poll to see if connection is established
1200  * @ep: endpoint to be used
1201  * @timeout_ms: timeout specified in millisecs
1202  *
1203  * Poll to see if TCP connection established
1204  */
1205 int beiscsi_ep_poll(struct iscsi_endpoint *ep, int timeout_ms)
1206 {
1207         struct beiscsi_endpoint *beiscsi_ep = ep->dd_data;
1208
1209         beiscsi_log(beiscsi_ep->phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1210                     "BS_%d : In  beiscsi_ep_poll\n");
1211
1212         if (beiscsi_ep->cid_vld == 1)
1213                 return 1;
1214         else
1215                 return 0;
1216 }
1217
1218 /**
1219  * beiscsi_flush_cq()- Flush the CQ created.
1220  * @phba: ptr device priv structure.
1221  *
1222  * Before the connection resource are freed flush
1223  * all the CQ enteries
1224  **/
1225 static void beiscsi_flush_cq(struct beiscsi_hba *phba)
1226 {
1227         uint16_t i;
1228         struct be_eq_obj *pbe_eq;
1229         struct hwi_controller *phwi_ctrlr;
1230         struct hwi_context_memory *phwi_context;
1231
1232         phwi_ctrlr = phba->phwi_ctrlr;
1233         phwi_context = phwi_ctrlr->phwi_ctxt;
1234
1235         for (i = 0; i < phba->num_cpus; i++) {
1236                 pbe_eq = &phwi_context->be_eq[i];
1237                 irq_poll_disable(&pbe_eq->iopoll);
1238                 beiscsi_process_cq(pbe_eq, BE2_MAX_NUM_CQ_PROC);
1239                 irq_poll_enable(&pbe_eq->iopoll);
1240         }
1241 }
1242
1243 /**
1244  * beiscsi_conn_close - Invalidate and upload connection
1245  * @beiscsi_ep: pointer to device endpoint struct
1246  *
1247  * Returns 0 on success,  -1 on failure.
1248  */
1249 static int beiscsi_conn_close(struct beiscsi_endpoint *beiscsi_ep)
1250 {
1251         struct beiscsi_hba *phba = beiscsi_ep->phba;
1252         unsigned int tag, attempts;
1253         int ret;
1254
1255         /**
1256          * Without successfully invalidating and uploading connection
1257          * driver can't reuse the CID so attempt more than once.
1258          */
1259         attempts = 0;
1260         while (attempts++ < 3) {
1261                 tag = beiscsi_invalidate_cxn(phba, beiscsi_ep);
1262                 if (tag) {
1263                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1264                         if (!ret)
1265                                 break;
1266                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1267                                     "BS_%d : invalidate conn failed cid %d\n",
1268                                     beiscsi_ep->ep_cid);
1269                 }
1270         }
1271
1272         /* wait for all completions to arrive, then process them */
1273         msleep(250);
1274         /* flush CQ entries */
1275         beiscsi_flush_cq(phba);
1276
1277         if (attempts > 3)
1278                 return -1;
1279
1280         attempts = 0;
1281         while (attempts++ < 3) {
1282                 tag = beiscsi_upload_cxn(phba, beiscsi_ep);
1283                 if (tag) {
1284                         ret = beiscsi_mccq_compl_wait(phba, tag, NULL, NULL);
1285                         if (!ret)
1286                                 break;
1287                         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1288                                     "BS_%d : upload conn failed cid %d\n",
1289                                     beiscsi_ep->ep_cid);
1290                 }
1291         }
1292         if (attempts > 3)
1293                 return -1;
1294
1295         return 0;
1296 }
1297
1298 /**
1299  * beiscsi_ep_disconnect - Tears down the TCP connection
1300  * @ep: endpoint to be used
1301  *
1302  * Tears down the TCP connection
1303  */
1304 void beiscsi_ep_disconnect(struct iscsi_endpoint *ep)
1305 {
1306         struct beiscsi_endpoint *beiscsi_ep;
1307         struct beiscsi_hba *phba;
1308         uint16_t cri_index;
1309
1310         beiscsi_ep = ep->dd_data;
1311         phba = beiscsi_ep->phba;
1312         beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1313                     "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n",
1314                     beiscsi_ep->ep_cid);
1315
1316         cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
1317         if (!phba->ep_array[cri_index]) {
1318                 __beiscsi_log(phba, KERN_ERR,
1319                               "BS_%d : ep_array at %u cid %u empty\n",
1320                               cri_index,
1321                               beiscsi_ep->ep_cid);
1322                 return;
1323         }
1324
1325         if (!beiscsi_hba_is_online(phba)) {
1326                 beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
1327                             "BS_%d : HBA in error 0x%lx\n", phba->state);
1328         } else {
1329                 /**
1330                  * Make CID available even if close fails.
1331                  * If not freed, FW might fail open using the CID.
1332                  */
1333                 if (beiscsi_conn_close(beiscsi_ep) < 0)
1334                         __beiscsi_log(phba, KERN_ERR,
1335                                       "BS_%d : close conn failed cid %d\n",
1336                                       beiscsi_ep->ep_cid);
1337         }
1338
1339         beiscsi_free_ep(beiscsi_ep);
1340         if (!phba->conn_table[cri_index])
1341                 __beiscsi_log(phba, KERN_ERR,
1342                               "BS_%d : conn_table empty at %u: cid %u\n",
1343                               cri_index, beiscsi_ep->ep_cid);
1344         phba->conn_table[cri_index] = NULL;
1345         iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep);
1346 }
1347
1348 umode_t beiscsi_attr_is_visible(int param_type, int param)
1349 {
1350         switch (param_type) {
1351         case ISCSI_NET_PARAM:
1352                 switch (param) {
1353                 case ISCSI_NET_PARAM_IFACE_ENABLE:
1354                 case ISCSI_NET_PARAM_IPV4_ADDR:
1355                 case ISCSI_NET_PARAM_IPV4_SUBNET:
1356                 case ISCSI_NET_PARAM_IPV4_BOOTPROTO:
1357                 case ISCSI_NET_PARAM_IPV4_GW:
1358                 case ISCSI_NET_PARAM_IPV6_ADDR:
1359                 case ISCSI_NET_PARAM_VLAN_ID:
1360                 case ISCSI_NET_PARAM_VLAN_PRIORITY:
1361                 case ISCSI_NET_PARAM_VLAN_ENABLED:
1362                         return S_IRUGO;
1363                 default:
1364                         return 0;
1365                 }
1366         case ISCSI_HOST_PARAM:
1367                 switch (param) {
1368                 case ISCSI_HOST_PARAM_HWADDRESS:
1369                 case ISCSI_HOST_PARAM_INITIATOR_NAME:
1370                 case ISCSI_HOST_PARAM_PORT_STATE:
1371                 case ISCSI_HOST_PARAM_PORT_SPEED:
1372                         return S_IRUGO;
1373                 default:
1374                         return 0;
1375                 }
1376         case ISCSI_PARAM:
1377                 switch (param) {
1378                 case ISCSI_PARAM_MAX_RECV_DLENGTH:
1379                 case ISCSI_PARAM_MAX_XMIT_DLENGTH:
1380                 case ISCSI_PARAM_HDRDGST_EN:
1381                 case ISCSI_PARAM_DATADGST_EN:
1382                 case ISCSI_PARAM_CONN_ADDRESS:
1383                 case ISCSI_PARAM_CONN_PORT:
1384                 case ISCSI_PARAM_EXP_STATSN:
1385                 case ISCSI_PARAM_PERSISTENT_ADDRESS:
1386                 case ISCSI_PARAM_PERSISTENT_PORT:
1387                 case ISCSI_PARAM_PING_TMO:
1388                 case ISCSI_PARAM_RECV_TMO:
1389                 case ISCSI_PARAM_INITIAL_R2T_EN:
1390                 case ISCSI_PARAM_MAX_R2T:
1391                 case ISCSI_PARAM_IMM_DATA_EN:
1392                 case ISCSI_PARAM_FIRST_BURST:
1393                 case ISCSI_PARAM_MAX_BURST:
1394                 case ISCSI_PARAM_PDU_INORDER_EN:
1395                 case ISCSI_PARAM_DATASEQ_INORDER_EN:
1396                 case ISCSI_PARAM_ERL:
1397                 case ISCSI_PARAM_TARGET_NAME:
1398                 case ISCSI_PARAM_TPGT:
1399                 case ISCSI_PARAM_USERNAME:
1400                 case ISCSI_PARAM_PASSWORD:
1401                 case ISCSI_PARAM_USERNAME_IN:
1402                 case ISCSI_PARAM_PASSWORD_IN:
1403                 case ISCSI_PARAM_FAST_ABORT:
1404                 case ISCSI_PARAM_ABORT_TMO:
1405                 case ISCSI_PARAM_LU_RESET_TMO:
1406                 case ISCSI_PARAM_IFACE_NAME:
1407                 case ISCSI_PARAM_INITIATOR_NAME:
1408                         return S_IRUGO;
1409                 default:
1410                         return 0;
1411                 }
1412         }
1413
1414         return 0;
1415 }