projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
caif: Add reference counting to service layer
[deliverable/linux.git] / net / caif / cfctrl.c
CommitLineData
b482cd20
SB		 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
20static int handle_loop(struct cfctrl *ctrl,
21 int cmd, struct cfpkt *pkt){
22 return CAIF_FAILURE;
23}
24#else
25static int handle_loop(struct cfctrl *ctrl,
26 int cmd, struct cfpkt *pkt);
27#endif
28static int cfctrl_recv(struct cflayer *layr, struct cfpkt *pkt);
29static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
30 int phyid);
31
32
33struct cflayer *cfctrl_create(void)
34{
35 struct cfctrl *this =
36 kmalloc(sizeof(struct cfctrl), GFP_ATOMIC);
37 if (!this) {
38 pr_warning("CAIF: %s(): Out of memory\n", __func__);
39 return NULL;
40 }
41 caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
42 memset(this, 0, sizeof(*this));
43 spin_lock_init(&this->info_list_lock);
44 atomic_set(&this->req_seq_no, 1);
45 atomic_set(&this->rsp_seq_no, 1);
46 this->serv.dev_info.id = 0xff;
47 this->serv.layer.id = 0;
48 this->serv.layer.receive = cfctrl_recv;
49 sprintf(this->serv.layer.name, "ctrl");
50 this->serv.layer.ctrlcmd = cfctrl_ctrlcmd;
51 spin_lock_init(&this->loop_linkid_lock);
52 this->loop_linkid = 1;
53 return &this->serv.layer;
54}
55
56static bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2)
57{
58 bool eq =
59 p1->linktype == p2->linktype &&
60 p1->priority == p2->priority &&
61 p1->phyid == p2->phyid &&
62 p1->endpoint == p2->endpoint && p1->chtype == p2->chtype;
63
64 if (!eq)
65 return false;
66
67 switch (p1->linktype) {
68 case CFCTRL_SRV_VEI:
69 return true;
70 case CFCTRL_SRV_DATAGRAM:
71 return p1->u.datagram.connid == p2->u.datagram.connid;
72 case CFCTRL_SRV_RFM:
73 return
74 p1->u.rfm.connid == p2->u.rfm.connid &&
75 strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0;
76 case CFCTRL_SRV_UTIL:
77 return
78 p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb
79 && p1->u.utility.fifosize_bufs ==
80 p2->u.utility.fifosize_bufs
81 && strcmp(p1->u.utility.name, p2->u.utility.name) == 0
82 && p1->u.utility.paramlen == p2->u.utility.paramlen
83 && memcmp(p1->u.utility.params, p2->u.utility.params,
84 p1->u.utility.paramlen) == 0;
85
86 case CFCTRL_SRV_VIDEO:
87 return p1->u.video.connid == p2->u.video.connid;
88 case CFCTRL_SRV_DBG:
89 return true;
90 case CFCTRL_SRV_DECM:
91 return false;
92 default:
93 return false;
94 }
95 return false;
96}
97
98bool cfctrl_req_eq(struct cfctrl_request_info *r1,
99 struct cfctrl_request_info *r2)
100{
101 if (r1->cmd != r2->cmd)
102 return false;
103 if (r1->cmd == CFCTRL_CMD_LINK_SETUP)
104 return param_eq(&r1->param, &r2->param);
105 else
106 return r1->channel_id == r2->channel_id;
107}
108
109/* Insert request at the end */
110void cfctrl_insert_req(struct cfctrl *ctrl,
111 struct cfctrl_request_info *req)
112{
113 struct cfctrl_request_info *p;
114 spin_lock(&ctrl->info_list_lock);
115 req->next = NULL;
116 atomic_inc(&ctrl->req_seq_no);
117 req->sequence_no = atomic_read(&ctrl->req_seq_no);
118 if (ctrl->first_req == NULL) {
119 ctrl->first_req = req;
120 spin_unlock(&ctrl->info_list_lock);
121 return;
122 }
123 p = ctrl->first_req;
124 while (p->next != NULL)
125 p = p->next;
126 p->next = req;
127 spin_unlock(&ctrl->info_list_lock);
128}
129
130static void cfctrl_insert_req2(struct cfctrl *ctrl, enum cfctrl_cmd cmd,
131 u8 linkid, struct cflayer *user_layer)
132{
133 struct cfctrl_request_info *req = kmalloc(sizeof(*req), GFP_KERNEL);
134 if (!req) {
135 pr_warning("CAIF: %s(): Out of memory\n", __func__);
136 return;
137 }
138 req->client_layer = user_layer;
139 req->cmd = cmd;
140 req->channel_id = linkid;
141 cfctrl_insert_req(ctrl, req);
142}
143
144/* Compare and remove request */
145struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl,
146 struct cfctrl_request_info *req)
147{
148 struct cfctrl_request_info *p;
149 struct cfctrl_request_info *ret;
150
151 spin_lock(&ctrl->info_list_lock);
152 if (ctrl->first_req == NULL) {
153 spin_unlock(&ctrl->info_list_lock);
154 return NULL;
155 }
156
157 if (cfctrl_req_eq(req, ctrl->first_req)) {
158 ret = ctrl->first_req;
159 caif_assert(ctrl->first_req);
160 atomic_set(&ctrl->rsp_seq_no,
161 ctrl->first_req->sequence_no);
162 ctrl->first_req = ctrl->first_req->next;
163 spin_unlock(&ctrl->info_list_lock);
164 return ret;
165 }
166
167 p = ctrl->first_req;
168
169 while (p->next != NULL) {
170 if (cfctrl_req_eq(req, p->next)) {
171 pr_warning("CAIF: %s(): Requests are not "
172 "received in order\n",
173 __func__);
174 ret = p->next;
175 atomic_set(&ctrl->rsp_seq_no,
176 p->next->sequence_no);
177 p->next = p->next->next;
178 spin_unlock(&ctrl->info_list_lock);
179 return ret;
180 }
181 p = p->next;
182 }
183 spin_unlock(&ctrl->info_list_lock);
184
185 pr_warning("CAIF: %s(): Request does not match\n",
186 __func__);
187 return NULL;
188}
189
190struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer)
191{
192 struct cfctrl *this = container_obj(layer);
193 return &this->res;
194}
195
196void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn)
197{
198 this->dn = dn;
199}
200
201void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up)
202{
203 this->up = up;
204}
205
206static void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl)
207{
208 info->hdr_len = 0;
209 info->channel_id = cfctrl->serv.layer.id;
210 info->dev_info = &cfctrl->serv.dev_info;
211}
212
213void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid)
214{
215 struct cfctrl *cfctrl = container_obj(layer);
216 int ret;
217 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
218 if (!pkt) {
219 pr_warning("CAIF: %s(): Out of memory\n", __func__);
220 return;
221 }
222 caif_assert(offsetof(struct cfctrl, serv.layer) == 0);
223 init_info(cfpkt_info(pkt), cfctrl);
224 cfpkt_info(pkt)->dev_info->id = physlinkid;
225 cfctrl->serv.dev_info.id = physlinkid;
226 cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM);
227 cfpkt_addbdy(pkt, physlinkid);
228 ret =
229 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
230 if (ret < 0) {
231 pr_err("CAIF: %s(): Could not transmit enum message\n",
232 __func__);
233 cfpkt_destroy(pkt);
234 }
235}
236
237void cfctrl_linkup_request(struct cflayer *layer,
238 struct cfctrl_link_param *param,
239 struct cflayer *user_layer)
240{
241 struct cfctrl *cfctrl = container_obj(layer);
242 u32 tmp32;
243 u16 tmp16;
244 u8 tmp8;
245 struct cfctrl_request_info *req;
246 int ret;
247 char utility_name[16];
248 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
249 if (!pkt) {
250 pr_warning("CAIF: %s(): Out of memory\n", __func__);
251 return;
252 }
253 cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP);
254 cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype);
255 cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid);
256 cfpkt_addbdy(pkt, param->endpoint & 0x03);
257
258 switch (param->linktype) {
259 case CFCTRL_SRV_VEI:
260 break;
261 case CFCTRL_SRV_VIDEO:
262 cfpkt_addbdy(pkt, (u8) param->u.video.connid);
263 break;
264 case CFCTRL_SRV_DBG:
265 break;
266 case CFCTRL_SRV_DATAGRAM:
267 tmp32 = cpu_to_le32(param->u.datagram.connid);
268 cfpkt_add_body(pkt, &tmp32, 4);
269 break;
270 case CFCTRL_SRV_RFM:
271 /* Construct a frame, convert DatagramConnectionID to network
272 * format long and copy it out...
273 */
274 tmp32 = cpu_to_le32(param->u.rfm.connid);
275 cfpkt_add_body(pkt, &tmp32, 4);
276 /* Add volume name, including zero termination... */
277 cfpkt_add_body(pkt, param->u.rfm.volume,
278 strlen(param->u.rfm.volume) + 1);
279 break;
280 case CFCTRL_SRV_UTIL:
281 tmp16 = cpu_to_le16(param->u.utility.fifosize_kb);
282 cfpkt_add_body(pkt, &tmp16, 2);
283 tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs);
284 cfpkt_add_body(pkt, &tmp16, 2);
285 memset(utility_name, 0, sizeof(utility_name));
286 strncpy(utility_name, param->u.utility.name,
287 UTILITY_NAME_LENGTH - 1);
288 cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH);
289 tmp8 = param->u.utility.paramlen;
290 cfpkt_add_body(pkt, &tmp8, 1);
291 cfpkt_add_body(pkt, param->u.utility.params,
292 param->u.utility.paramlen);
293 break;
294 default:
295 pr_warning("CAIF: %s():Request setup of bad link type = %d\n",
296 __func__, param->linktype);
297 }
298 req = kmalloc(sizeof(*req), GFP_KERNEL);
299 if (!req) {
300 pr_warning("CAIF: %s(): Out of memory\n", __func__);
301 return;
302 }
303 memset(req, 0, sizeof(*req));
304 req->client_layer = user_layer;
305 req->cmd = CFCTRL_CMD_LINK_SETUP;
306 req->param = *param;
307 cfctrl_insert_req(cfctrl, req);
308 init_info(cfpkt_info(pkt), cfctrl);
309 cfpkt_info(pkt)->dev_info->id = param->phyid;
310 ret =
311 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
312 if (ret < 0) {
313 pr_err("CAIF: %s(): Could not transmit linksetup request\n",
314 __func__);
315 cfpkt_destroy(pkt);
316 }
317}
318
319int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid,
320 struct cflayer *client)
321{
322 int ret;
323 struct cfctrl *cfctrl = container_obj(layer);
324 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
325 if (!pkt) {
326 pr_warning("CAIF: %s(): Out of memory\n", __func__);
327 return -ENOMEM;
328 }
329 cfctrl_insert_req2(cfctrl, CFCTRL_CMD_LINK_DESTROY, channelid, client);
330 cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY);
331 cfpkt_addbdy(pkt, channelid);
332 init_info(cfpkt_info(pkt), cfctrl);
333 ret =
334 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
335 if (ret < 0) {
336 pr_err("CAIF: %s(): Could not transmit link-down request\n",
337 __func__);
338 cfpkt_destroy(pkt);
339 }
340 return ret;
341}
342
343void cfctrl_sleep_req(struct cflayer *layer)
344{
345 int ret;
346 struct cfctrl *cfctrl = container_obj(layer);
347 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
348 if (!pkt) {
349 pr_warning("CAIF: %s(): Out of memory\n", __func__);
350 return;
351 }
352 cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP);
353 init_info(cfpkt_info(pkt), cfctrl);
354 ret =
355 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
356 if (ret < 0)
357 cfpkt_destroy(pkt);
358}
359
360void cfctrl_wake_req(struct cflayer *layer)
361{
362 int ret;
363 struct cfctrl *cfctrl = container_obj(layer);
364 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
365 if (!pkt) {
366 pr_warning("CAIF: %s(): Out of memory\n", __func__);
367 return;
368 }
369 cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE);
370 init_info(cfpkt_info(pkt), cfctrl);
371 ret =
372 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
373 if (ret < 0)
374 cfpkt_destroy(pkt);
375}
376
377void cfctrl_getstartreason_req(struct cflayer *layer)
378{
379 int ret;
380 struct cfctrl *cfctrl = container_obj(layer);
381 struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN);
382 if (!pkt) {
383 pr_warning("CAIF: %s(): Out of memory\n", __func__);
384 return;
385 }
386 cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON);
387 init_info(cfpkt_info(pkt), cfctrl);
388 ret =
389 cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt);
390 if (ret < 0)
391 cfpkt_destroy(pkt);
392}
393
394
395static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt)
396{
397 u8 cmdrsp;
398 u8 cmd;
399 int ret = -1;
400 u16 tmp16;
401 u8 len;
402 u8 param[255];
403 u8 linkid;
404 struct cfctrl *cfctrl = container_obj(layer);
405 struct cfctrl_request_info rsp, *req;
406
407
408 cfpkt_extr_head(pkt, &cmdrsp, 1);
409 cmd = cmdrsp & CFCTRL_CMD_MASK;
410 if (cmd != CFCTRL_CMD_LINK_ERR
411 && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) {
412 if (handle_loop(cfctrl, cmd, pkt) == CAIF_FAILURE) {
413 pr_info("CAIF: %s() CAIF Protocol error:"
414 "Response bit not set\n", __func__);
415 goto error;
416 }
417 }
418
419 switch (cmd) {
420 case CFCTRL_CMD_LINK_SETUP:
421 {
422 enum cfctrl_srv serv;
423 enum cfctrl_srv servtype;
424 u8 endpoint;
425 u8 physlinkid;
426 u8 prio;
427 u8 tmp;
428 u32 tmp32;
429 u8 *cp;
430 int i;
431 struct cfctrl_link_param linkparam;
432 memset(&linkparam, 0, sizeof(linkparam));
433
434 cfpkt_extr_head(pkt, &tmp, 1);
435
436 serv = tmp & CFCTRL_SRV_MASK;
437 linkparam.linktype = serv;
438
439 servtype = tmp >> 4;
440 linkparam.chtype = servtype;
441
442 cfpkt_extr_head(pkt, &tmp, 1);
443 physlinkid = tmp & 0x07;
444 prio = tmp >> 3;
445
446 linkparam.priority = prio;
447 linkparam.phyid = physlinkid;
448 cfpkt_extr_head(pkt, &endpoint, 1);
449 linkparam.endpoint = endpoint & 0x03;
450
451 switch (serv) {
452 case CFCTRL_SRV_VEI:
453 case CFCTRL_SRV_DBG:
454 /* Link ID */
455 cfpkt_extr_head(pkt, &linkid, 1);
456 break;
457 case CFCTRL_SRV_VIDEO:
458 cfpkt_extr_head(pkt, &tmp, 1);
459 linkparam.u.video.connid = tmp;
460 /* Link ID */
461 cfpkt_extr_head(pkt, &linkid, 1);
462 break;
463
464 case CFCTRL_SRV_DATAGRAM:
465 cfpkt_extr_head(pkt, &tmp32, 4);
466 linkparam.u.datagram.connid =
467 le32_to_cpu(tmp32);
468 /* Link ID */
469 cfpkt_extr_head(pkt, &linkid, 1);
470 break;
471 case CFCTRL_SRV_RFM:
472 /* Construct a frame, convert
473 * DatagramConnectionID
474 * to network format long and copy it out...
475 */
476 cfpkt_extr_head(pkt, &tmp32, 4);
477 linkparam.u.rfm.connid =
478 le32_to_cpu(tmp32);
479 cp = (u8 *) linkparam.u.rfm.volume;
480 for (cfpkt_extr_head(pkt, &tmp, 1);
481 cfpkt_more(pkt) && tmp != '\0';
482 cfpkt_extr_head(pkt, &tmp, 1))
483 *cp++ = tmp;
484 *cp = '\0';
485
486 /* Link ID */
487 cfpkt_extr_head(pkt, &linkid, 1);
488
489 break;
490 case CFCTRL_SRV_UTIL:
491 /* Construct a frame, convert
492 * DatagramConnectionID
493 * to network format long and copy it out...
494 */
495 /* Fifosize KB */
496 cfpkt_extr_head(pkt, &tmp16, 2);
497 linkparam.u.utility.fifosize_kb =
498 le16_to_cpu(tmp16);
499 /* Fifosize bufs */
500 cfpkt_extr_head(pkt, &tmp16, 2);
501 linkparam.u.utility.fifosize_bufs =
502 le16_to_cpu(tmp16);
503 /* name */
504 cp = (u8 *) linkparam.u.utility.name;
505 caif_assert(sizeof(linkparam.u.utility.name)
506 >= UTILITY_NAME_LENGTH);
507 for (i = 0;
508 i < UTILITY_NAME_LENGTH
509 && cfpkt_more(pkt); i++) {
510 cfpkt_extr_head(pkt, &tmp, 1);
511 *cp++ = tmp;
512 }
513 /* Length */
514 cfpkt_extr_head(pkt, &len, 1);
515 linkparam.u.utility.paramlen = len;
516 /* Param Data */
517 cp = linkparam.u.utility.params;
518 while (cfpkt_more(pkt) && len--) {
519 cfpkt_extr_head(pkt, &tmp, 1);
520 *cp++ = tmp;
521 }
522 /* Link ID */
523 cfpkt_extr_head(pkt, &linkid, 1);
524 /* Length */
525 cfpkt_extr_head(pkt, &len, 1);
526 /* Param Data */
527 cfpkt_extr_head(pkt, &param, len);
528 break;
529 default:
530 pr_warning("CAIF: %s(): Request setup "
531 "- invalid link type (%d)",
532 __func__, serv);
533 goto error;
534 }
535
536 rsp.cmd = cmd;
537 rsp.param = linkparam;
538 req = cfctrl_remove_req(cfctrl, &rsp);
539
540 if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) ||
541 cfpkt_erroneous(pkt)) {
542 pr_err("CAIF: %s(): Invalid O/E bit or parse "
543 "error on CAIF control channel",
544 __func__);
545 cfctrl->res.reject_rsp(cfctrl->serv.layer.up,
546 0,
547 req ? req->client_layer
548 : NULL);
549 } else {
550 cfctrl->res.linksetup_rsp(cfctrl->serv.
551 layer.up, linkid,
552 serv, physlinkid,
553 req ? req->
554 client_layer : NULL);
555 }
556
557 if (req != NULL)
558 kfree(req);
559 }
560 break;
561 case CFCTRL_CMD_LINK_DESTROY:
562 cfpkt_extr_head(pkt, &linkid, 1);
563 rsp.cmd = cmd;
564 rsp.channel_id = linkid;
565 req = cfctrl_remove_req(cfctrl, &rsp);
566 cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid,
567 req ? req->client_layer : NULL);
568 if (req != NULL)
569 kfree(req);
570 break;
571 case CFCTRL_CMD_LINK_ERR:
572 pr_err("CAIF: %s(): Frame Error Indication received\n",
573 __func__);
574 cfctrl->res.linkerror_ind();
575 break;
576 case CFCTRL_CMD_ENUM:
577 cfctrl->res.enum_rsp();
578 break;
579 case CFCTRL_CMD_SLEEP:
580 cfctrl->res.sleep_rsp();
581 break;
582 case CFCTRL_CMD_WAKE:
583 cfctrl->res.wake_rsp();
584 break;
585 case CFCTRL_CMD_LINK_RECONF:
586 cfctrl->res.restart_rsp();
587 break;
588 case CFCTRL_CMD_RADIO_SET:
589 cfctrl->res.radioset_rsp();
590 break;
591 default:
592 pr_err("CAIF: %s(): Unrecognized Control Frame\n", __func__);
593 goto error;
594 break;
595 }
596 ret = 0;
597error:
598 cfpkt_destroy(pkt);
599 return ret;
600}
601
602static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl,
603 int phyid)
604{
605 struct cfctrl *this = container_obj(layr);
606 switch (ctrl) {
607 case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND:
608 case CAIF_CTRLCMD_FLOW_OFF_IND:
609 spin_lock(&this->info_list_lock);
610 if (this->first_req != NULL) {
611 pr_warning("CAIF: %s(): Received flow off in "
612 "control layer", __func__);
613 }
614 spin_unlock(&this->info_list_lock);
615 break;
616 default:
617 break;
618 }
619}
620
621#ifndef CAIF_NO_LOOP
622static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt)
623{
624 static int last_linkid;
625 u8 linkid, linktype, tmp;
626 switch (cmd) {
627 case CFCTRL_CMD_LINK_SETUP:
628 spin_lock(&ctrl->loop_linkid_lock);
629 for (linkid = last_linkid + 1; linkid < 255; linkid++)
630 if (!ctrl->loop_linkused[linkid])
631 goto found;
632 for (linkid = last_linkid - 1; linkid > 0; linkid--)
633 if (!ctrl->loop_linkused[linkid])
634 goto found;
635 spin_unlock(&ctrl->loop_linkid_lock);
636 return -EINVAL;
637found:
638 if (!ctrl->loop_linkused[linkid])
639 ctrl->loop_linkused[linkid] = 1;
640
641 last_linkid = linkid;
642
643 cfpkt_add_trail(pkt, &linkid, 1);
644 spin_unlock(&ctrl->loop_linkid_lock);
645 cfpkt_peek_head(pkt, &linktype, 1);
646 if (linktype == CFCTRL_SRV_UTIL) {
647 tmp = 0x01;
648 cfpkt_add_trail(pkt, &tmp, 1);
649 cfpkt_add_trail(pkt, &tmp, 1);
650 }
651 break;
652
653 case CFCTRL_CMD_LINK_DESTROY:
654 spin_lock(&ctrl->loop_linkid_lock);
655 cfpkt_peek_head(pkt, &linkid, 1);
656 ctrl->loop_linkused[linkid] = 0;
657 spin_unlock(&ctrl->loop_linkid_lock);
658 break;
659 default:
660 break;
661 }
662 return CAIF_SUCCESS;
663}
664#endif
Linux kernel - Deliverables
This page took 0.05311 seconds and 5 git commands to generate.