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 #include <linux/stddef.h> 8 #include <linux/spinlock.h> 9 #include <linux/slab.h> 10 #include <net/caif/caif_layer.h> 11 #include <net/caif/cfpkt.h> 12 #include <net/caif/cfctrl.h> 13 14 #define container_obj(layr) container_of(layr, struct cfctrl, serv.layer) 15 #define UTILITY_NAME_LENGTH 16 16 #define CFPKT_CTRL_PKT_LEN 20 17 18 19 #ifdef CAIF_NO_LOOP 20 static int handle_loop(struct cfctrl *ctrl, 21 int cmd, struct cfpkt *pkt){ 22 return CAIF_FAILURE; 23 } 24 #else 25 static int handle_loop(struct cfctrl *ctrl, 26 int cmd, struct cfpkt *pkt); 27 #endif 28 static int cfctrl_recv(struct cflayer *layr, struct cfpkt *pkt); 29 static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, 30 int phyid); 31 32 33 struct cflayer *cfctrl_create(void) 34 { 35 struct dev_info dev_info; 36 struct cfctrl *this = 37 kmalloc(sizeof(struct cfctrl), GFP_ATOMIC); 38 if (!this) { 39 pr_warning("CAIF: %s(): Out of memory\n", __func__); 40 return NULL; 41 } 42 caif_assert(offsetof(struct cfctrl, serv.layer) == 0); 43 memset(&dev_info, 0, sizeof(dev_info)); 44 dev_info.id = 0xff; 45 memset(this, 0, sizeof(*this)); 46 cfsrvl_init(&this->serv, 0, &dev_info); 47 atomic_set(&this->req_seq_no, 1); 48 atomic_set(&this->rsp_seq_no, 1); 49 this->serv.layer.receive = cfctrl_recv; 50 sprintf(this->serv.layer.name, "ctrl"); 51 this->serv.layer.ctrlcmd = cfctrl_ctrlcmd; 52 spin_lock_init(&this->loop_linkid_lock); 53 spin_lock_init(&this->info_list_lock); 54 INIT_LIST_HEAD(&this->list); 55 this->loop_linkid = 1; 56 return &this->serv.layer; 57 } 58 59 static bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2) 60 { 61 bool eq = 62 p1->linktype == p2->linktype && 63 p1->priority == p2->priority && 64 p1->phyid == p2->phyid && 65 p1->endpoint == p2->endpoint && p1->chtype == p2->chtype; 66 67 if (!eq) 68 return false; 69 70 switch (p1->linktype) { 71 case CFCTRL_SRV_VEI: 72 return true; 73 case CFCTRL_SRV_DATAGRAM: 74 return p1->u.datagram.connid == p2->u.datagram.connid; 75 case CFCTRL_SRV_RFM: 76 return 77 p1->u.rfm.connid == p2->u.rfm.connid && 78 strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0; 79 case CFCTRL_SRV_UTIL: 80 return 81 p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb 82 && p1->u.utility.fifosize_bufs == 83 p2->u.utility.fifosize_bufs 84 && strcmp(p1->u.utility.name, p2->u.utility.name) == 0 85 && p1->u.utility.paramlen == p2->u.utility.paramlen 86 && memcmp(p1->u.utility.params, p2->u.utility.params, 87 p1->u.utility.paramlen) == 0; 88 89 case CFCTRL_SRV_VIDEO: 90 return p1->u.video.connid == p2->u.video.connid; 91 case CFCTRL_SRV_DBG: 92 return true; 93 case CFCTRL_SRV_DECM: 94 return false; 95 default: 96 return false; 97 } 98 return false; 99 } 100 101 bool cfctrl_req_eq(struct cfctrl_request_info *r1, 102 struct cfctrl_request_info *r2) 103 { 104 if (r1->cmd != r2->cmd) 105 return false; 106 if (r1->cmd == CFCTRL_CMD_LINK_SETUP) 107 return param_eq(&r1->param, &r2->param); 108 else 109 return r1->channel_id == r2->channel_id; 110 } 111 112 /* Insert request at the end */ 113 void cfctrl_insert_req(struct cfctrl *ctrl, 114 struct cfctrl_request_info *req) 115 { 116 spin_lock(&ctrl->info_list_lock); 117 atomic_inc(&ctrl->req_seq_no); 118 req->sequence_no = atomic_read(&ctrl->req_seq_no); 119 list_add_tail(&req->list, &ctrl->list); 120 spin_unlock(&ctrl->info_list_lock); 121 } 122 123 /* Compare and remove request */ 124 struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl, 125 struct cfctrl_request_info *req) 126 { 127 struct cfctrl_request_info *p, *tmp, *first; 128 129 spin_lock(&ctrl->info_list_lock); 130 first = list_first_entry(&ctrl->list, struct cfctrl_request_info, list); 131 132 list_for_each_entry_safe(p, tmp, &ctrl->list, list) { 133 if (cfctrl_req_eq(req, p)) { 134 if (p != first) 135 pr_warning("CAIF: %s(): Requests are not " 136 "received in order\n", 137 __func__); 138 139 atomic_set(&ctrl->rsp_seq_no, 140 p->sequence_no); 141 list_del(&p->list); 142 goto out; 143 } 144 } 145 p = NULL; 146 out: 147 spin_unlock(&ctrl->info_list_lock); 148 return p; 149 } 150 151 struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer) 152 { 153 struct cfctrl *this = container_obj(layer); 154 return &this->res; 155 } 156 157 void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn) 158 { 159 this->dn = dn; 160 } 161 162 void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up) 163 { 164 this->up = up; 165 } 166 167 static void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl) 168 { 169 info->hdr_len = 0; 170 info->channel_id = cfctrl->serv.layer.id; 171 info->dev_info = &cfctrl->serv.dev_info; 172 } 173 174 void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid) 175 { 176 struct cfctrl *cfctrl = container_obj(layer); 177 int ret; 178 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 179 if (!pkt) { 180 pr_warning("CAIF: %s(): Out of memory\n", __func__); 181 return; 182 } 183 caif_assert(offsetof(struct cfctrl, serv.layer) == 0); 184 init_info(cfpkt_info(pkt), cfctrl); 185 cfpkt_info(pkt)->dev_info->id = physlinkid; 186 cfctrl->serv.dev_info.id = physlinkid; 187 cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM); 188 cfpkt_addbdy(pkt, physlinkid); 189 ret = 190 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 191 if (ret < 0) { 192 pr_err("CAIF: %s(): Could not transmit enum message\n", 193 __func__); 194 cfpkt_destroy(pkt); 195 } 196 } 197 198 int cfctrl_linkup_request(struct cflayer *layer, 199 struct cfctrl_link_param *param, 200 struct cflayer *user_layer) 201 { 202 struct cfctrl *cfctrl = container_obj(layer); 203 u32 tmp32; 204 u16 tmp16; 205 u8 tmp8; 206 struct cfctrl_request_info *req; 207 int ret; 208 char utility_name[16]; 209 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 210 if (!pkt) { 211 pr_warning("CAIF: %s(): Out of memory\n", __func__); 212 return -ENOMEM; 213 } 214 cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP); 215 cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype); 216 cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid); 217 cfpkt_addbdy(pkt, param->endpoint & 0x03); 218 219 switch (param->linktype) { 220 case CFCTRL_SRV_VEI: 221 break; 222 case CFCTRL_SRV_VIDEO: 223 cfpkt_addbdy(pkt, (u8) param->u.video.connid); 224 break; 225 case CFCTRL_SRV_DBG: 226 break; 227 case CFCTRL_SRV_DATAGRAM: 228 tmp32 = cpu_to_le32(param->u.datagram.connid); 229 cfpkt_add_body(pkt, &tmp32, 4); 230 break; 231 case CFCTRL_SRV_RFM: 232 /* Construct a frame, convert DatagramConnectionID to network 233 * format long and copy it out... 234 */ 235 tmp32 = cpu_to_le32(param->u.rfm.connid); 236 cfpkt_add_body(pkt, &tmp32, 4); 237 /* Add volume name, including zero termination... */ 238 cfpkt_add_body(pkt, param->u.rfm.volume, 239 strlen(param->u.rfm.volume) + 1); 240 break; 241 case CFCTRL_SRV_UTIL: 242 tmp16 = cpu_to_le16(param->u.utility.fifosize_kb); 243 cfpkt_add_body(pkt, &tmp16, 2); 244 tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs); 245 cfpkt_add_body(pkt, &tmp16, 2); 246 memset(utility_name, 0, sizeof(utility_name)); 247 strncpy(utility_name, param->u.utility.name, 248 UTILITY_NAME_LENGTH - 1); 249 cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH); 250 tmp8 = param->u.utility.paramlen; 251 cfpkt_add_body(pkt, &tmp8, 1); 252 cfpkt_add_body(pkt, param->u.utility.params, 253 param->u.utility.paramlen); 254 break; 255 default: 256 pr_warning("CAIF: %s():Request setup of bad link type = %d\n", 257 __func__, param->linktype); 258 return -EINVAL; 259 } 260 req = kzalloc(sizeof(*req), GFP_KERNEL); 261 if (!req) { 262 pr_warning("CAIF: %s(): Out of memory\n", __func__); 263 return -ENOMEM; 264 } 265 req->client_layer = user_layer; 266 req->cmd = CFCTRL_CMD_LINK_SETUP; 267 req->param = *param; 268 cfctrl_insert_req(cfctrl, req); 269 init_info(cfpkt_info(pkt), cfctrl); 270 /* 271 * NOTE:Always send linkup and linkdown request on the same 272 * device as the payload. Otherwise old queued up payload 273 * might arrive with the newly allocated channel ID. 274 */ 275 cfpkt_info(pkt)->dev_info->id = param->phyid; 276 ret = 277 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 278 if (ret < 0) { 279 pr_err("CAIF: %s(): Could not transmit linksetup request\n", 280 __func__); 281 cfpkt_destroy(pkt); 282 return -ENODEV; 283 } 284 return 0; 285 } 286 287 int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid, 288 struct cflayer *client) 289 { 290 int ret; 291 struct cfctrl *cfctrl = container_obj(layer); 292 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 293 if (!pkt) { 294 pr_warning("CAIF: %s(): Out of memory\n", __func__); 295 return -ENOMEM; 296 } 297 cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY); 298 cfpkt_addbdy(pkt, channelid); 299 init_info(cfpkt_info(pkt), cfctrl); 300 ret = 301 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 302 if (ret < 0) { 303 pr_err("CAIF: %s(): Could not transmit link-down request\n", 304 __func__); 305 cfpkt_destroy(pkt); 306 } 307 return ret; 308 } 309 310 void cfctrl_sleep_req(struct cflayer *layer) 311 { 312 int ret; 313 struct cfctrl *cfctrl = container_obj(layer); 314 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 315 if (!pkt) { 316 pr_warning("CAIF: %s(): Out of memory\n", __func__); 317 return; 318 } 319 cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP); 320 init_info(cfpkt_info(pkt), cfctrl); 321 ret = 322 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 323 if (ret < 0) 324 cfpkt_destroy(pkt); 325 } 326 327 void cfctrl_wake_req(struct cflayer *layer) 328 { 329 int ret; 330 struct cfctrl *cfctrl = container_obj(layer); 331 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 332 if (!pkt) { 333 pr_warning("CAIF: %s(): Out of memory\n", __func__); 334 return; 335 } 336 cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE); 337 init_info(cfpkt_info(pkt), cfctrl); 338 ret = 339 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 340 if (ret < 0) 341 cfpkt_destroy(pkt); 342 } 343 344 void cfctrl_getstartreason_req(struct cflayer *layer) 345 { 346 int ret; 347 struct cfctrl *cfctrl = container_obj(layer); 348 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); 349 if (!pkt) { 350 pr_warning("CAIF: %s(): Out of memory\n", __func__); 351 return; 352 } 353 cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON); 354 init_info(cfpkt_info(pkt), cfctrl); 355 ret = 356 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); 357 if (ret < 0) 358 cfpkt_destroy(pkt); 359 } 360 361 362 void cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer) 363 { 364 struct cfctrl_request_info *p, *tmp; 365 struct cfctrl *ctrl = container_obj(layr); 366 spin_lock(&ctrl->info_list_lock); 367 pr_warning("CAIF: %s(): enter\n", __func__); 368 369 list_for_each_entry_safe(p, tmp, &ctrl->list, list) { 370 if (p->client_layer == adap_layer) { 371 pr_warning("CAIF: %s(): cancel req :%d\n", __func__, 372 p->sequence_no); 373 list_del(&p->list); 374 kfree(p); 375 } 376 } 377 378 spin_unlock(&ctrl->info_list_lock); 379 } 380 381 static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt) 382 { 383 u8 cmdrsp; 384 u8 cmd; 385 int ret = -1; 386 u16 tmp16; 387 u8 len; 388 u8 param[255]; 389 u8 linkid; 390 struct cfctrl *cfctrl = container_obj(layer); 391 struct cfctrl_request_info rsp, *req; 392 393 394 cfpkt_extr_head(pkt, &cmdrsp, 1); 395 cmd = cmdrsp & CFCTRL_CMD_MASK; 396 if (cmd != CFCTRL_CMD_LINK_ERR 397 && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) { 398 if (handle_loop(cfctrl, cmd, pkt) == CAIF_FAILURE) 399 cmdrsp |= CFCTRL_ERR_BIT; 400 } 401 402 switch (cmd) { 403 case CFCTRL_CMD_LINK_SETUP: 404 { 405 enum cfctrl_srv serv; 406 enum cfctrl_srv servtype; 407 u8 endpoint; 408 u8 physlinkid; 409 u8 prio; 410 u8 tmp; 411 u32 tmp32; 412 u8 *cp; 413 int i; 414 struct cfctrl_link_param linkparam; 415 memset(&linkparam, 0, sizeof(linkparam)); 416 417 cfpkt_extr_head(pkt, &tmp, 1); 418 419 serv = tmp & CFCTRL_SRV_MASK; 420 linkparam.linktype = serv; 421 422 servtype = tmp >> 4; 423 linkparam.chtype = servtype; 424 425 cfpkt_extr_head(pkt, &tmp, 1); 426 physlinkid = tmp & 0x07; 427 prio = tmp >> 3; 428 429 linkparam.priority = prio; 430 linkparam.phyid = physlinkid; 431 cfpkt_extr_head(pkt, &endpoint, 1); 432 linkparam.endpoint = endpoint & 0x03; 433 434 switch (serv) { 435 case CFCTRL_SRV_VEI: 436 case CFCTRL_SRV_DBG: 437 if (CFCTRL_ERR_BIT & cmdrsp) 438 break; 439 /* Link ID */ 440 cfpkt_extr_head(pkt, &linkid, 1); 441 break; 442 case CFCTRL_SRV_VIDEO: 443 cfpkt_extr_head(pkt, &tmp, 1); 444 linkparam.u.video.connid = tmp; 445 if (CFCTRL_ERR_BIT & cmdrsp) 446 break; 447 /* Link ID */ 448 cfpkt_extr_head(pkt, &linkid, 1); 449 break; 450 451 case CFCTRL_SRV_DATAGRAM: 452 cfpkt_extr_head(pkt, &tmp32, 4); 453 linkparam.u.datagram.connid = 454 le32_to_cpu(tmp32); 455 if (CFCTRL_ERR_BIT & cmdrsp) 456 break; 457 /* Link ID */ 458 cfpkt_extr_head(pkt, &linkid, 1); 459 break; 460 case CFCTRL_SRV_RFM: 461 /* Construct a frame, convert 462 * DatagramConnectionID 463 * to network format long and copy it out... 464 */ 465 cfpkt_extr_head(pkt, &tmp32, 4); 466 linkparam.u.rfm.connid = 467 le32_to_cpu(tmp32); 468 cp = (u8 *) linkparam.u.rfm.volume; 469 for (cfpkt_extr_head(pkt, &tmp, 1); 470 cfpkt_more(pkt) && tmp != '\0'; 471 cfpkt_extr_head(pkt, &tmp, 1)) 472 *cp++ = tmp; 473 *cp = '\0'; 474 475 if (CFCTRL_ERR_BIT & cmdrsp) 476 break; 477 /* Link ID */ 478 cfpkt_extr_head(pkt, &linkid, 1); 479 480 break; 481 case CFCTRL_SRV_UTIL: 482 /* Construct a frame, convert 483 * DatagramConnectionID 484 * to network format long and copy it out... 485 */ 486 /* Fifosize KB */ 487 cfpkt_extr_head(pkt, &tmp16, 2); 488 linkparam.u.utility.fifosize_kb = 489 le16_to_cpu(tmp16); 490 /* Fifosize bufs */ 491 cfpkt_extr_head(pkt, &tmp16, 2); 492 linkparam.u.utility.fifosize_bufs = 493 le16_to_cpu(tmp16); 494 /* name */ 495 cp = (u8 *) linkparam.u.utility.name; 496 caif_assert(sizeof(linkparam.u.utility.name) 497 >= UTILITY_NAME_LENGTH); 498 for (i = 0; 499 i < UTILITY_NAME_LENGTH 500 && cfpkt_more(pkt); i++) { 501 cfpkt_extr_head(pkt, &tmp, 1); 502 *cp++ = tmp; 503 } 504 /* Length */ 505 cfpkt_extr_head(pkt, &len, 1); 506 linkparam.u.utility.paramlen = len; 507 /* Param Data */ 508 cp = linkparam.u.utility.params; 509 while (cfpkt_more(pkt) && len--) { 510 cfpkt_extr_head(pkt, &tmp, 1); 511 *cp++ = tmp; 512 } 513 if (CFCTRL_ERR_BIT & cmdrsp) 514 break; 515 /* Link ID */ 516 cfpkt_extr_head(pkt, &linkid, 1); 517 /* Length */ 518 cfpkt_extr_head(pkt, &len, 1); 519 /* Param Data */ 520 cfpkt_extr_head(pkt, ¶m, len); 521 break; 522 default: 523 pr_warning("CAIF: %s(): Request setup " 524 "- invalid link type (%d)", 525 __func__, serv); 526 goto error; 527 } 528 529 rsp.cmd = cmd; 530 rsp.param = linkparam; 531 req = cfctrl_remove_req(cfctrl, &rsp); 532 533 if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) || 534 cfpkt_erroneous(pkt)) { 535 pr_err("CAIF: %s(): Invalid O/E bit or parse " 536 "error on CAIF control channel", 537 __func__); 538 cfctrl->res.reject_rsp(cfctrl->serv.layer.up, 539 0, 540 req ? req->client_layer 541 : NULL); 542 } else { 543 cfctrl->res.linksetup_rsp(cfctrl->serv. 544 layer.up, linkid, 545 serv, physlinkid, 546 req ? req-> 547 client_layer : NULL); 548 } 549 550 if (req != NULL) 551 kfree(req); 552 } 553 break; 554 case CFCTRL_CMD_LINK_DESTROY: 555 cfpkt_extr_head(pkt, &linkid, 1); 556 cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid); 557 break; 558 case CFCTRL_CMD_LINK_ERR: 559 pr_err("CAIF: %s(): Frame Error Indication received\n", 560 __func__); 561 cfctrl->res.linkerror_ind(); 562 break; 563 case CFCTRL_CMD_ENUM: 564 cfctrl->res.enum_rsp(); 565 break; 566 case CFCTRL_CMD_SLEEP: 567 cfctrl->res.sleep_rsp(); 568 break; 569 case CFCTRL_CMD_WAKE: 570 cfctrl->res.wake_rsp(); 571 break; 572 case CFCTRL_CMD_LINK_RECONF: 573 cfctrl->res.restart_rsp(); 574 break; 575 case CFCTRL_CMD_RADIO_SET: 576 cfctrl->res.radioset_rsp(); 577 break; 578 default: 579 pr_err("CAIF: %s(): Unrecognized Control Frame\n", __func__); 580 goto error; 581 break; 582 } 583 ret = 0; 584 error: 585 cfpkt_destroy(pkt); 586 return ret; 587 } 588 589 static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, 590 int phyid) 591 { 592 struct cfctrl *this = container_obj(layr); 593 switch (ctrl) { 594 case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: 595 case CAIF_CTRLCMD_FLOW_OFF_IND: 596 spin_lock(&this->info_list_lock); 597 if (!list_empty(&this->list)) { 598 pr_debug("CAIF: %s(): Received flow off in " 599 "control layer", __func__); 600 } 601 spin_unlock(&this->info_list_lock); 602 break; 603 default: 604 break; 605 } 606 } 607 608 #ifndef CAIF_NO_LOOP 609 static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt) 610 { 611 static int last_linkid; 612 u8 linkid, linktype, tmp; 613 switch (cmd) { 614 case CFCTRL_CMD_LINK_SETUP: 615 spin_lock(&ctrl->loop_linkid_lock); 616 for (linkid = last_linkid + 1; linkid < 255; linkid++) 617 if (!ctrl->loop_linkused[linkid]) 618 goto found; 619 for (linkid = last_linkid - 1; linkid > 0; linkid--) 620 if (!ctrl->loop_linkused[linkid]) 621 goto found; 622 spin_unlock(&ctrl->loop_linkid_lock); 623 pr_err("CAIF: %s(): Out of link-ids\n", __func__); 624 return -EINVAL; 625 found: 626 if (!ctrl->loop_linkused[linkid]) 627 ctrl->loop_linkused[linkid] = 1; 628 629 last_linkid = linkid; 630 631 cfpkt_add_trail(pkt, &linkid, 1); 632 spin_unlock(&ctrl->loop_linkid_lock); 633 cfpkt_peek_head(pkt, &linktype, 1); 634 if (linktype == CFCTRL_SRV_UTIL) { 635 tmp = 0x01; 636 cfpkt_add_trail(pkt, &tmp, 1); 637 cfpkt_add_trail(pkt, &tmp, 1); 638 } 639 break; 640 641 case CFCTRL_CMD_LINK_DESTROY: 642 spin_lock(&ctrl->loop_linkid_lock); 643 cfpkt_peek_head(pkt, &linkid, 1); 644 ctrl->loop_linkused[linkid] = 0; 645 spin_unlock(&ctrl->loop_linkid_lock); 646 break; 647 default: 648 break; 649 } 650 return CAIF_SUCCESS; 651 } 652 #endif 653