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