net/caif/cfcnfg.c

   1 /*
   2  * Copyright (C) ST-Ericsson AB 2010
   3  * Author:      Sjur Brendeland/sjur.brandeland@stericsson.com
   4  * License terms: GNU General Public License (GPL) version 2
   5  */
   6
   7 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
   8
   9 #include <linux/kernel.h>
  10 #include <linux/stddef.h>
  11 #include <linux/slab.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/module.h>
  14 #include <net/caif/caif_layer.h>
  15 #include <net/caif/cfpkt.h>
  16 #include <net/caif/cfcnfg.h>
  17 #include <net/caif/cfctrl.h>
  18 #include <net/caif/cfmuxl.h>
  19 #include <net/caif/cffrml.h>
  20 #include <net/caif/cfserl.h>
  21 #include <net/caif/cfsrvl.h>
  22 #include <net/caif/caif_dev.h>
  23
  24 #define container_obj(layr) container_of(layr, struct cfcnfg, layer)
  25
  26 /* Information about CAIF physical interfaces held by Config Module in order
  27  * to manage physical interfaces
  28  */
  29 struct cfcnfg_phyinfo {
  30         struct list_head node;
  31         bool up;
  32
  33         /* Pointer to the layer below the MUX (framing layer) */
  34         struct cflayer *frm_layer;
  35         /* Pointer to the lowest actual physical layer */
  36         struct cflayer *phy_layer;
  37         /* Unique identifier of the physical interface */
  38         unsigned int id;
  39         /* Preference of the physical in interface */
  40         enum cfcnfg_phy_preference pref;
  41
  42         /* Information about the physical device */
  43         struct dev_info dev_info;
  44
  45         /* Interface index */
  46         int ifindex;
  47
  48         /* Use Start of frame extension */
  49         bool use_stx;
  50
  51         /* Use Start of frame checksum */
  52         bool use_fcs;
  53 };
  54
  55 struct cfcnfg {
  56         struct cflayer layer;
  57         struct cflayer *ctrl;
  58         struct cflayer *mux;
  59         struct list_head phys;
  60         struct mutex lock;
  61 };
  62
  63 static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id,
  64                              enum cfctrl_srv serv, u8 phyid,
  65                              struct cflayer *adapt_layer);
  66 static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id);
  67 static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
  68                              struct cflayer *adapt_layer);
  69 static void cfctrl_resp_func(void);
  70 static void cfctrl_enum_resp(void);
  71
  72 struct cfcnfg *cfcnfg_create(void)
  73 {
  74         struct cfcnfg *this;
  75         struct cfctrl_rsp *resp;
  76
  77         might_sleep();
  78
  79         /* Initiate this layer */
  80         this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
  81         if (!this) {
  82                 pr_warn("Out of memory\n");
  83                 return NULL;
  84         }
  85         this->mux = cfmuxl_create();
  86         if (!this->mux)
  87                 goto out_of_mem;
  88         this->ctrl = cfctrl_create();
  89         if (!this->ctrl)
  90                 goto out_of_mem;
  91         /* Initiate response functions */
  92         resp = cfctrl_get_respfuncs(this->ctrl);
  93         resp->enum_rsp = cfctrl_enum_resp;
  94         resp->linkerror_ind = cfctrl_resp_func;
  95         resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp;
  96         resp->sleep_rsp = cfctrl_resp_func;
  97         resp->wake_rsp = cfctrl_resp_func;
  98         resp->restart_rsp = cfctrl_resp_func;
  99         resp->radioset_rsp = cfctrl_resp_func;
 100         resp->linksetup_rsp = cfcnfg_linkup_rsp;
 101         resp->reject_rsp = cfcnfg_reject_rsp;
 102         INIT_LIST_HEAD(&this->phys);
 103
 104         cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
 105         layer_set_dn(this->ctrl, this->mux);
 106         layer_set_up(this->ctrl, this);
 107         mutex_init(&this->lock);
 108
 109         return this;
 110 out_of_mem:
 111         pr_warn("Out of memory\n");
 112
 113         synchronize_rcu();
 114
 115         kfree(this->mux);
 116         kfree(this->ctrl);
 117         kfree(this);
 118         return NULL;
 119 }
 120
 121 void cfcnfg_remove(struct cfcnfg *cfg)
 122 {
 123         might_sleep();
 124         if (cfg) {
 125                 synchronize_rcu();
 126
 127                 kfree(cfg->mux);
 128                 cfctrl_remove(cfg->ctrl);
 129                 kfree(cfg);
 130         }
 131 }
 132
 133 static void cfctrl_resp_func(void)
 134 {
 135 }
 136
 137 static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo_rcu(struct cfcnfg *cnfg,
 138                                                         u8 phyid)
 139 {
 140         struct cfcnfg_phyinfo *phy;
 141
 142         list_for_each_entry_rcu(phy, &cnfg->phys, node)
 143                 if (phy->id == phyid)
 144                         return phy;
 145         return NULL;
 146 }
 147
 148 static void cfctrl_enum_resp(void)
 149 {
 150 }
 151
 152 static struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg,
 153                                   enum cfcnfg_phy_preference phy_pref)
 154 {
 155         /* Try to match with specified preference */
 156         struct cfcnfg_phyinfo *phy;
 157
 158         list_for_each_entry_rcu(phy, &cnfg->phys, node) {
 159                 if (phy->up && phy->pref == phy_pref &&
 160                                 phy->frm_layer != NULL)
 161
 162                         return &phy->dev_info;
 163         }
 164
 165         /* Otherwise just return something */
 166         list_for_each_entry_rcu(phy, &cnfg->phys, node)
 167                 if (phy->up)
 168                         return &phy->dev_info;
 169
 170         return NULL;
 171 }
 172
 173 static int cfcnfg_get_id_from_ifi(struct cfcnfg *cnfg, int ifi)
 174 {
 175         struct cfcnfg_phyinfo *phy;
 176
 177         list_for_each_entry_rcu(phy, &cnfg->phys, node)
 178                 if (phy->ifindex == ifi && phy->up)
 179                         return phy->id;
 180         return -ENODEV;
 181 }
 182
 183 int caif_disconnect_client(struct net *net, struct cflayer *adap_layer)
 184 {
 185         u8 channel_id;
 186         struct cfcnfg *cfg = get_cfcnfg(net);
 187
 188         caif_assert(adap_layer != NULL);
 189         cfctrl_cancel_req(cfg->ctrl, adap_layer);
 190         channel_id = adap_layer->id;
 191         if (channel_id != 0) {
 192                 struct cflayer *servl;
 193                 servl = cfmuxl_remove_uplayer(cfg->mux, channel_id);
 194                 if (servl != NULL)
 195                         layer_set_up(servl, NULL);
 196         } else
 197                 pr_debug("nothing to disconnect\n");
 198         cfctrl_linkdown_req(cfg->ctrl, channel_id, adap_layer);
 199
 200         /* Do RCU sync before initiating cleanup */
 201         synchronize_rcu();
 202         if (adap_layer->ctrlcmd != NULL)
 203                 adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0);
 204         return 0;
 205
 206 }
 207 EXPORT_SYMBOL(caif_disconnect_client);
 208
 209 static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id)
 210 {
 211 }
 212
 213 static const int protohead[CFCTRL_SRV_MASK] = {
 214         [CFCTRL_SRV_VEI] = 4,
 215         [CFCTRL_SRV_DATAGRAM] = 7,
 216         [CFCTRL_SRV_UTIL] = 4,
 217         [CFCTRL_SRV_RFM] = 3,
 218         [CFCTRL_SRV_DBG] = 3,
 219 };
 220
 221
 222 static int caif_connect_req_to_link_param(struct cfcnfg *cnfg,
 223                                    struct caif_connect_request *s,
 224                                    struct cfctrl_link_param *l)
 225 {
 226         struct dev_info *dev_info;
 227         enum cfcnfg_phy_preference pref;
 228         int res;
 229
 230         memset(l, 0, sizeof(*l));
 231         /* In caif protocol low value is high priority */
 232         l->priority = CAIF_PRIO_MAX - s->priority + 1;
 233
 234         if (s->ifindex != 0) {
 235                 res = cfcnfg_get_id_from_ifi(cnfg, s->ifindex);
 236                 if (res < 0)
 237                         return res;
 238                 l->phyid = res;
 239         } else {
 240                 switch (s->link_selector) {
 241                 case CAIF_LINK_HIGH_BANDW:
 242                         pref = CFPHYPREF_HIGH_BW;
 243                         break;
 244                 case CAIF_LINK_LOW_LATENCY:
 245                         pref = CFPHYPREF_LOW_LAT;
 246                         break;
 247                 default:
 248                         return -EINVAL;
 249                 }
 250                 dev_info = cfcnfg_get_phyid(cnfg, pref);
 251                 if (dev_info == NULL)
 252                         return -ENODEV;
 253                 l->phyid = dev_info->id;
 254         }
 255         switch (s->protocol) {
 256         case CAIFPROTO_AT:
 257                 l->linktype = CFCTRL_SRV_VEI;
 258                 l->endpoint = (s->sockaddr.u.at.type >> 2) & 0x3;
 259                 l->chtype = s->sockaddr.u.at.type & 0x3;
 260                 break;
 261         case CAIFPROTO_DATAGRAM:
 262                 l->linktype = CFCTRL_SRV_DATAGRAM;
 263                 l->chtype = 0x00;
 264                 l->u.datagram.connid = s->sockaddr.u.dgm.connection_id;
 265                 break;
 266         case CAIFPROTO_DATAGRAM_LOOP:
 267                 l->linktype = CFCTRL_SRV_DATAGRAM;
 268                 l->chtype = 0x03;
 269                 l->endpoint = 0x00;
 270                 l->u.datagram.connid = s->sockaddr.u.dgm.connection_id;
 271                 break;
 272         case CAIFPROTO_RFM:
 273                 l->linktype = CFCTRL_SRV_RFM;
 274                 l->u.datagram.connid = s->sockaddr.u.rfm.connection_id;
 275                 strncpy(l->u.rfm.volume, s->sockaddr.u.rfm.volume,
 276                         sizeof(l->u.rfm.volume)-1);
 277                 l->u.rfm.volume[sizeof(l->u.rfm.volume)-1] = 0;
 278                 break;
 279         case CAIFPROTO_UTIL:
 280                 l->linktype = CFCTRL_SRV_UTIL;
 281                 l->endpoint = 0x00;
 282                 l->chtype = 0x00;
 283                 strncpy(l->u.utility.name, s->sockaddr.u.util.service,
 284                         sizeof(l->u.utility.name)-1);
 285                 l->u.utility.name[sizeof(l->u.utility.name)-1] = 0;
 286                 caif_assert(sizeof(l->u.utility.name) > 10);
 287                 l->u.utility.paramlen = s->param.size;
 288                 if (l->u.utility.paramlen > sizeof(l->u.utility.params))
 289                         l->u.utility.paramlen = sizeof(l->u.utility.params);
 290
 291                 memcpy(l->u.utility.params, s->param.data,
 292                        l->u.utility.paramlen);
 293
 294                 break;
 295         case CAIFPROTO_DEBUG:
 296                 l->linktype = CFCTRL_SRV_DBG;
 297                 l->endpoint = s->sockaddr.u.dbg.service;
 298                 l->chtype = s->sockaddr.u.dbg.type;
 299                 break;
 300         default:
 301                 return -EINVAL;
 302         }
 303         return 0;
 304 }
 305
 306 int caif_connect_client(struct net *net, struct caif_connect_request *conn_req,
 307                         struct cflayer *adap_layer, int *ifindex,
 308                                 int *proto_head,
 309                                 int *proto_tail)
 310 {
 311         struct cflayer *frml;
 312         struct cfcnfg_phyinfo *phy;
 313         int err;
 314         struct cfctrl_link_param param;
 315         struct cfcnfg *cfg = get_cfcnfg(net);
 316         caif_assert(cfg != NULL);
 317
 318         rcu_read_lock();
 319         err = caif_connect_req_to_link_param(cfg, conn_req, &param);
 320         if (err)
 321                 goto unlock;
 322
 323         phy = cfcnfg_get_phyinfo_rcu(cfg, param.phyid);
 324         if (!phy) {
 325                 err = -ENODEV;
 326                 goto unlock;
 327         }
 328         err = -EINVAL;
 329
 330         if (adap_layer == NULL) {
 331                 pr_err("adap_layer is zero\n");
 332                 goto unlock;
 333         }
 334         if (adap_layer->receive == NULL) {
 335                 pr_err("adap_layer->receive is NULL\n");
 336                 goto unlock;
 337         }
 338         if (adap_layer->ctrlcmd == NULL) {
 339                 pr_err("adap_layer->ctrlcmd == NULL\n");
 340                 goto unlock;
 341         }
 342
 343         err = -ENODEV;
 344         frml = phy->frm_layer;
 345         if (frml == NULL) {
 346                 pr_err("Specified PHY type does not exist!\n");
 347                 goto unlock;
 348         }
 349         caif_assert(param.phyid == phy->id);
 350         caif_assert(phy->frm_layer->id ==
 351                      param.phyid);
 352         caif_assert(phy->phy_layer->id ==
 353                      param.phyid);
 354
 355         *ifindex = phy->ifindex;
 356         *proto_tail = 2;
 357         *proto_head =
 358
 359         protohead[param.linktype] + (phy->use_stx ? 1 : 0);
 360
 361         rcu_read_unlock();
 362
 363         /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
 364         cfctrl_enum_req(cfg->ctrl, param.phyid);
 365         return cfctrl_linkup_request(cfg->ctrl, &param, adap_layer);
 366
 367 unlock:
 368         rcu_read_unlock();
 369         return err;
 370 }
 371 EXPORT_SYMBOL(caif_connect_client);
 372
 373 static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
 374                              struct cflayer *adapt_layer)
 375 {
 376         if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
 377                 adapt_layer->ctrlcmd(adapt_layer,
 378                                      CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
 379 }
 380
 381 static void
 382 cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv,
 383                   u8 phyid, struct cflayer *adapt_layer)
 384 {
 385         struct cfcnfg *cnfg = container_obj(layer);
 386         struct cflayer *servicel = NULL;
 387         struct cfcnfg_phyinfo *phyinfo;
 388         struct net_device *netdev;
 389
 390         if (channel_id == 0) {
 391                 pr_warn("received channel_id zero\n");
 392                 if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
 393                         adapt_layer->ctrlcmd(adapt_layer,
 394                                                 CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
 395                 return;
 396         }
 397
 398         rcu_read_lock();
 399
 400         if (adapt_layer == NULL) {
 401                 pr_debug("link setup response but no client exist,"
 402                                 "send linkdown back\n");
 403                 cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL);
 404                 goto unlock;
 405         }
 406
 407         caif_assert(cnfg != NULL);
 408         caif_assert(phyid != 0);
 409
 410         phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phyid);
 411         if (phyinfo == NULL) {
 412                 pr_err("ERROR: Link Layer Device dissapeared"
 413                                 "while connecting\n");
 414                 goto unlock;
 415         }
 416
 417         caif_assert(phyinfo != NULL);
 418         caif_assert(phyinfo->id == phyid);
 419         caif_assert(phyinfo->phy_layer != NULL);
 420         caif_assert(phyinfo->phy_layer->id == phyid);
 421
 422         adapt_layer->id = channel_id;
 423
 424         switch (serv) {
 425         case CFCTRL_SRV_VEI:
 426                 servicel = cfvei_create(channel_id, &phyinfo->dev_info);
 427                 break;
 428         case CFCTRL_SRV_DATAGRAM:
 429                 servicel = cfdgml_create(channel_id,
 430                                         &phyinfo->dev_info);
 431                 break;
 432         case CFCTRL_SRV_RFM:
 433                 netdev = phyinfo->dev_info.dev;
 434                 servicel = cfrfml_create(channel_id, &phyinfo->dev_info,
 435                                                 netdev->mtu);
 436                 break;
 437         case CFCTRL_SRV_UTIL:
 438                 servicel = cfutill_create(channel_id, &phyinfo->dev_info);
 439                 break;
 440         case CFCTRL_SRV_VIDEO:
 441                 servicel = cfvidl_create(channel_id, &phyinfo->dev_info);
 442                 break;
 443         case CFCTRL_SRV_DBG:
 444                 servicel = cfdbgl_create(channel_id, &phyinfo->dev_info);
 445                 break;
 446         default:
 447                 pr_err("Protocol error. Link setup response "
 448                                 "- unknown channel type\n");
 449                 goto unlock;
 450         }
 451         if (!servicel) {
 452                 pr_warn("Out of memory\n");
 453                 goto unlock;
 454         }
 455         layer_set_dn(servicel, cnfg->mux);
 456         cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
 457         layer_set_up(servicel, adapt_layer);
 458         layer_set_dn(adapt_layer, servicel);
 459
 460         rcu_read_unlock();
 461
 462         servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
 463         return;
 464 unlock:
 465         rcu_read_unlock();
 466 }
 467
 468 void
 469 cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
 470                      struct net_device *dev, struct cflayer *phy_layer,
 471                      enum cfcnfg_phy_preference pref,
 472                      bool fcs, bool stx)
 473 {
 474         struct cflayer *frml;
 475         struct cflayer *phy_driver = NULL;
 476         struct cfcnfg_phyinfo *phyinfo;
 477         int i;
 478         u8 phyid;
 479
 480         mutex_lock(&cnfg->lock);
 481
 482         /* CAIF protocol allow maximum 6 link-layers */
 483         for (i = 0; i < 7; i++) {
 484                 phyid = (dev->ifindex + i) & 0x7;
 485                 if (phyid == 0)
 486                         continue;
 487                 if (cfcnfg_get_phyinfo_rcu(cnfg, phyid) == NULL)
 488                         goto got_phyid;
 489         }
 490         pr_warn("Too many CAIF Link Layers (max 6)\n");
 491         goto out;
 492
 493 got_phyid:
 494         phyinfo = kzalloc(sizeof(struct cfcnfg_phyinfo), GFP_ATOMIC);
 495
 496         switch (phy_type) {
 497         case CFPHYTYPE_FRAG:
 498                 phy_driver =
 499                     cfserl_create(CFPHYTYPE_FRAG, phyid, stx);
 500                 if (!phy_driver) {
 501                         pr_warn("Out of memory\n");
 502                         goto out;
 503                 }
 504                 break;
 505         case CFPHYTYPE_CAIF:
 506                 phy_driver = NULL;
 507                 break;
 508         default:
 509                 goto out;
 510         }
 511         phy_layer->id = phyid;
 512         phyinfo->pref = pref;
 513         phyinfo->id = phyid;
 514         phyinfo->dev_info.id = phyid;
 515         phyinfo->dev_info.dev = dev;
 516         phyinfo->phy_layer = phy_layer;
 517         phyinfo->ifindex = dev->ifindex;
 518         phyinfo->use_stx = stx;
 519         phyinfo->use_fcs = fcs;
 520
 521         frml = cffrml_create(phyid, fcs);
 522
 523         if (!frml) {
 524                 pr_warn("Out of memory\n");
 525                 kfree(phyinfo);
 526                 goto out;
 527         }
 528         phyinfo->frm_layer = frml;
 529         layer_set_up(frml, cnfg->mux);
 530
 531         if (phy_driver != NULL) {
 532                 phy_driver->id = phyid;
 533                 layer_set_dn(frml, phy_driver);
 534                 layer_set_up(phy_driver, frml);
 535                 layer_set_dn(phy_driver, phy_layer);
 536                 layer_set_up(phy_layer, phy_driver);
 537         } else {
 538                 layer_set_dn(frml, phy_layer);
 539                 layer_set_up(phy_layer, frml);
 540         }
 541
 542         list_add_rcu(&phyinfo->node, &cnfg->phys);
 543 out:
 544         mutex_unlock(&cnfg->lock);
 545 }
 546 EXPORT_SYMBOL(cfcnfg_add_phy_layer);
 547
 548 int cfcnfg_set_phy_state(struct cfcnfg *cnfg, struct cflayer *phy_layer,
 549                 bool up)
 550 {
 551         struct cfcnfg_phyinfo *phyinfo;
 552
 553         rcu_read_lock();
 554         phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phy_layer->id);
 555         if (phyinfo == NULL) {
 556                 rcu_read_unlock();
 557                 return -ENODEV;
 558         }
 559
 560         if (phyinfo->up == up) {
 561                 rcu_read_unlock();
 562                 return 0;
 563         }
 564         phyinfo->up = up;
 565
 566         if (up) {
 567                 cffrml_hold(phyinfo->frm_layer);
 568                 cfmuxl_set_dnlayer(cnfg->mux, phyinfo->frm_layer,
 569                                         phy_layer->id);
 570         } else {
 571                 cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
 572                 cffrml_put(phyinfo->frm_layer);
 573         }
 574
 575         rcu_read_unlock();
 576         return 0;
 577 }
 578 EXPORT_SYMBOL(cfcnfg_set_phy_state);
 579
 580 int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer)
 581 {
 582         struct cflayer *frml, *frml_dn;
 583         u16 phyid;
 584         struct cfcnfg_phyinfo *phyinfo;
 585
 586         might_sleep();
 587
 588         mutex_lock(&cnfg->lock);
 589
 590         phyid = phy_layer->id;
 591         phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phyid);
 592
 593         if (phyinfo == NULL) {
 594                 mutex_unlock(&cnfg->lock);
 595                 return 0;
 596         }
 597         caif_assert(phyid == phyinfo->id);
 598         caif_assert(phy_layer == phyinfo->phy_layer);
 599         caif_assert(phy_layer->id == phyid);
 600         caif_assert(phyinfo->frm_layer->id == phyid);
 601
 602         list_del_rcu(&phyinfo->node);
 603         synchronize_rcu();
 604
 605         /* Fail if reference count is not zero */
 606         if (cffrml_refcnt_read(phyinfo->frm_layer) != 0) {
 607                 pr_info("Wait for device inuse\n");
 608                 list_add_rcu(&phyinfo->node, &cnfg->phys);
 609                 mutex_unlock(&cnfg->lock);
 610                 return -EAGAIN;
 611         }
 612
 613         frml = phyinfo->frm_layer;
 614         frml_dn = frml->dn;
 615         cffrml_set_uplayer(frml, NULL);
 616         cffrml_set_dnlayer(frml, NULL);
 617         if (phy_layer != frml_dn) {
 618                 layer_set_up(frml_dn, NULL);
 619                 layer_set_dn(frml_dn, NULL);
 620         }
 621         layer_set_up(phy_layer, NULL);
 622
 623         if (phyinfo->phy_layer != frml_dn)
 624                 kfree(frml_dn);
 625
 626         cffrml_free(frml);
 627         kfree(phyinfo);
 628         mutex_unlock(&cnfg->lock);
 629
 630         return 0;
 631 }
 632 EXPORT_SYMBOL(cfcnfg_del_phy_layer);