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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 | |
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 | { | |
8d545c8f | 35 | struct dev_info dev_info; |
b482cd20 SB |
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); | |
8d545c8f SB |
43 | memset(&dev_info, 0, sizeof(dev_info)); |
44 | dev_info.id = 0xff; | |
b482cd20 | 45 | memset(this, 0, sizeof(*this)); |
8d545c8f | 46 | cfsrvl_init(&this->serv, 0, &dev_info); |
b482cd20 SB |
47 | spin_lock_init(&this->info_list_lock); |
48 | atomic_set(&this->req_seq_no, 1); | |
49 | atomic_set(&this->rsp_seq_no, 1); | |
b482cd20 SB |
50 | this->serv.layer.receive = cfctrl_recv; |
51 | sprintf(this->serv.layer.name, "ctrl"); | |
52 | this->serv.layer.ctrlcmd = cfctrl_ctrlcmd; | |
53 | spin_lock_init(&this->loop_linkid_lock); | |
54 | this->loop_linkid = 1; | |
55 | return &this->serv.layer; | |
56 | } | |
57 | ||
58 | static bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2) | |
59 | { | |
60 | bool eq = | |
61 | p1->linktype == p2->linktype && | |
62 | p1->priority == p2->priority && | |
63 | p1->phyid == p2->phyid && | |
64 | p1->endpoint == p2->endpoint && p1->chtype == p2->chtype; | |
65 | ||
66 | if (!eq) | |
67 | return false; | |
68 | ||
69 | switch (p1->linktype) { | |
70 | case CFCTRL_SRV_VEI: | |
71 | return true; | |
72 | case CFCTRL_SRV_DATAGRAM: | |
73 | return p1->u.datagram.connid == p2->u.datagram.connid; | |
74 | case CFCTRL_SRV_RFM: | |
75 | return | |
76 | p1->u.rfm.connid == p2->u.rfm.connid && | |
77 | strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0; | |
78 | case CFCTRL_SRV_UTIL: | |
79 | return | |
80 | p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb | |
81 | && p1->u.utility.fifosize_bufs == | |
82 | p2->u.utility.fifosize_bufs | |
83 | && strcmp(p1->u.utility.name, p2->u.utility.name) == 0 | |
84 | && p1->u.utility.paramlen == p2->u.utility.paramlen | |
85 | && memcmp(p1->u.utility.params, p2->u.utility.params, | |
86 | p1->u.utility.paramlen) == 0; | |
87 | ||
88 | case CFCTRL_SRV_VIDEO: | |
89 | return p1->u.video.connid == p2->u.video.connid; | |
90 | case CFCTRL_SRV_DBG: | |
91 | return true; | |
92 | case CFCTRL_SRV_DECM: | |
93 | return false; | |
94 | default: | |
95 | return false; | |
96 | } | |
97 | return false; | |
98 | } | |
99 | ||
100 | bool cfctrl_req_eq(struct cfctrl_request_info *r1, | |
101 | struct cfctrl_request_info *r2) | |
102 | { | |
103 | if (r1->cmd != r2->cmd) | |
104 | return false; | |
105 | if (r1->cmd == CFCTRL_CMD_LINK_SETUP) | |
106 | return param_eq(&r1->param, &r2->param); | |
107 | else | |
108 | return r1->channel_id == r2->channel_id; | |
109 | } | |
110 | ||
111 | /* Insert request at the end */ | |
112 | void cfctrl_insert_req(struct cfctrl *ctrl, | |
113 | struct cfctrl_request_info *req) | |
114 | { | |
115 | struct cfctrl_request_info *p; | |
116 | spin_lock(&ctrl->info_list_lock); | |
117 | req->next = NULL; | |
118 | atomic_inc(&ctrl->req_seq_no); | |
119 | req->sequence_no = atomic_read(&ctrl->req_seq_no); | |
120 | if (ctrl->first_req == NULL) { | |
121 | ctrl->first_req = req; | |
122 | spin_unlock(&ctrl->info_list_lock); | |
123 | return; | |
124 | } | |
125 | p = ctrl->first_req; | |
126 | while (p->next != NULL) | |
127 | p = p->next; | |
128 | p->next = req; | |
129 | spin_unlock(&ctrl->info_list_lock); | |
130 | } | |
131 | ||
b482cd20 SB |
132 | /* Compare and remove request */ |
133 | struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl, | |
134 | struct cfctrl_request_info *req) | |
135 | { | |
136 | struct cfctrl_request_info *p; | |
137 | struct cfctrl_request_info *ret; | |
138 | ||
139 | spin_lock(&ctrl->info_list_lock); | |
140 | if (ctrl->first_req == NULL) { | |
141 | spin_unlock(&ctrl->info_list_lock); | |
142 | return NULL; | |
143 | } | |
144 | ||
145 | if (cfctrl_req_eq(req, ctrl->first_req)) { | |
146 | ret = ctrl->first_req; | |
147 | caif_assert(ctrl->first_req); | |
148 | atomic_set(&ctrl->rsp_seq_no, | |
149 | ctrl->first_req->sequence_no); | |
150 | ctrl->first_req = ctrl->first_req->next; | |
151 | spin_unlock(&ctrl->info_list_lock); | |
152 | return ret; | |
153 | } | |
154 | ||
155 | p = ctrl->first_req; | |
156 | ||
157 | while (p->next != NULL) { | |
158 | if (cfctrl_req_eq(req, p->next)) { | |
159 | pr_warning("CAIF: %s(): Requests are not " | |
160 | "received in order\n", | |
161 | __func__); | |
162 | ret = p->next; | |
163 | atomic_set(&ctrl->rsp_seq_no, | |
164 | p->next->sequence_no); | |
165 | p->next = p->next->next; | |
166 | spin_unlock(&ctrl->info_list_lock); | |
167 | return ret; | |
168 | } | |
169 | p = p->next; | |
170 | } | |
171 | spin_unlock(&ctrl->info_list_lock); | |
172 | ||
173 | pr_warning("CAIF: %s(): Request does not match\n", | |
174 | __func__); | |
175 | return NULL; | |
176 | } | |
177 | ||
178 | struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer) | |
179 | { | |
180 | struct cfctrl *this = container_obj(layer); | |
181 | return &this->res; | |
182 | } | |
183 | ||
184 | void cfctrl_set_dnlayer(struct cflayer *this, struct cflayer *dn) | |
185 | { | |
186 | this->dn = dn; | |
187 | } | |
188 | ||
189 | void cfctrl_set_uplayer(struct cflayer *this, struct cflayer *up) | |
190 | { | |
191 | this->up = up; | |
192 | } | |
193 | ||
194 | static void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl) | |
195 | { | |
196 | info->hdr_len = 0; | |
197 | info->channel_id = cfctrl->serv.layer.id; | |
198 | info->dev_info = &cfctrl->serv.dev_info; | |
199 | } | |
200 | ||
201 | void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid) | |
202 | { | |
203 | struct cfctrl *cfctrl = container_obj(layer); | |
204 | int ret; | |
205 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
206 | if (!pkt) { | |
207 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
208 | return; | |
209 | } | |
210 | caif_assert(offsetof(struct cfctrl, serv.layer) == 0); | |
211 | init_info(cfpkt_info(pkt), cfctrl); | |
212 | cfpkt_info(pkt)->dev_info->id = physlinkid; | |
213 | cfctrl->serv.dev_info.id = physlinkid; | |
214 | cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM); | |
215 | cfpkt_addbdy(pkt, physlinkid); | |
216 | ret = | |
217 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
218 | if (ret < 0) { | |
219 | pr_err("CAIF: %s(): Could not transmit enum message\n", | |
220 | __func__); | |
221 | cfpkt_destroy(pkt); | |
222 | } | |
223 | } | |
224 | ||
8d545c8f | 225 | int cfctrl_linkup_request(struct cflayer *layer, |
b482cd20 SB |
226 | struct cfctrl_link_param *param, |
227 | struct cflayer *user_layer) | |
228 | { | |
229 | struct cfctrl *cfctrl = container_obj(layer); | |
230 | u32 tmp32; | |
231 | u16 tmp16; | |
232 | u8 tmp8; | |
233 | struct cfctrl_request_info *req; | |
234 | int ret; | |
235 | char utility_name[16]; | |
236 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
237 | if (!pkt) { | |
238 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
8d545c8f | 239 | return -ENOMEM; |
b482cd20 SB |
240 | } |
241 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP); | |
242 | cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype); | |
243 | cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid); | |
244 | cfpkt_addbdy(pkt, param->endpoint & 0x03); | |
245 | ||
246 | switch (param->linktype) { | |
247 | case CFCTRL_SRV_VEI: | |
248 | break; | |
249 | case CFCTRL_SRV_VIDEO: | |
250 | cfpkt_addbdy(pkt, (u8) param->u.video.connid); | |
251 | break; | |
252 | case CFCTRL_SRV_DBG: | |
253 | break; | |
254 | case CFCTRL_SRV_DATAGRAM: | |
255 | tmp32 = cpu_to_le32(param->u.datagram.connid); | |
256 | cfpkt_add_body(pkt, &tmp32, 4); | |
257 | break; | |
258 | case CFCTRL_SRV_RFM: | |
259 | /* Construct a frame, convert DatagramConnectionID to network | |
260 | * format long and copy it out... | |
261 | */ | |
262 | tmp32 = cpu_to_le32(param->u.rfm.connid); | |
263 | cfpkt_add_body(pkt, &tmp32, 4); | |
264 | /* Add volume name, including zero termination... */ | |
265 | cfpkt_add_body(pkt, param->u.rfm.volume, | |
266 | strlen(param->u.rfm.volume) + 1); | |
267 | break; | |
268 | case CFCTRL_SRV_UTIL: | |
269 | tmp16 = cpu_to_le16(param->u.utility.fifosize_kb); | |
270 | cfpkt_add_body(pkt, &tmp16, 2); | |
271 | tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs); | |
272 | cfpkt_add_body(pkt, &tmp16, 2); | |
273 | memset(utility_name, 0, sizeof(utility_name)); | |
274 | strncpy(utility_name, param->u.utility.name, | |
275 | UTILITY_NAME_LENGTH - 1); | |
276 | cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH); | |
277 | tmp8 = param->u.utility.paramlen; | |
278 | cfpkt_add_body(pkt, &tmp8, 1); | |
279 | cfpkt_add_body(pkt, param->u.utility.params, | |
280 | param->u.utility.paramlen); | |
281 | break; | |
282 | default: | |
283 | pr_warning("CAIF: %s():Request setup of bad link type = %d\n", | |
284 | __func__, param->linktype); | |
8d545c8f | 285 | return -EINVAL; |
b482cd20 | 286 | } |
49afa55b | 287 | req = kzalloc(sizeof(*req), GFP_KERNEL); |
b482cd20 SB |
288 | if (!req) { |
289 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
8d545c8f | 290 | return -ENOMEM; |
b482cd20 | 291 | } |
b482cd20 SB |
292 | req->client_layer = user_layer; |
293 | req->cmd = CFCTRL_CMD_LINK_SETUP; | |
294 | req->param = *param; | |
295 | cfctrl_insert_req(cfctrl, req); | |
296 | init_info(cfpkt_info(pkt), cfctrl); | |
8d545c8f SB |
297 | /* |
298 | * NOTE:Always send linkup and linkdown request on the same | |
299 | * device as the payload. Otherwise old queued up payload | |
300 | * might arrive with the newly allocated channel ID. | |
301 | */ | |
b482cd20 SB |
302 | cfpkt_info(pkt)->dev_info->id = param->phyid; |
303 | ret = | |
304 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
305 | if (ret < 0) { | |
306 | pr_err("CAIF: %s(): Could not transmit linksetup request\n", | |
307 | __func__); | |
308 | cfpkt_destroy(pkt); | |
8d545c8f | 309 | return -ENODEV; |
b482cd20 | 310 | } |
8d545c8f | 311 | return 0; |
b482cd20 SB |
312 | } |
313 | ||
314 | int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid, | |
315 | struct cflayer *client) | |
316 | { | |
317 | int ret; | |
318 | struct cfctrl *cfctrl = container_obj(layer); | |
319 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
320 | if (!pkt) { | |
321 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
322 | return -ENOMEM; | |
323 | } | |
b482cd20 SB |
324 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY); |
325 | cfpkt_addbdy(pkt, channelid); | |
326 | init_info(cfpkt_info(pkt), cfctrl); | |
327 | ret = | |
328 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
329 | if (ret < 0) { | |
330 | pr_err("CAIF: %s(): Could not transmit link-down request\n", | |
331 | __func__); | |
332 | cfpkt_destroy(pkt); | |
333 | } | |
334 | return ret; | |
335 | } | |
336 | ||
337 | void cfctrl_sleep_req(struct cflayer *layer) | |
338 | { | |
339 | int ret; | |
340 | struct cfctrl *cfctrl = container_obj(layer); | |
341 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
342 | if (!pkt) { | |
343 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
344 | return; | |
345 | } | |
346 | cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP); | |
347 | init_info(cfpkt_info(pkt), cfctrl); | |
348 | ret = | |
349 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
350 | if (ret < 0) | |
351 | cfpkt_destroy(pkt); | |
352 | } | |
353 | ||
354 | void cfctrl_wake_req(struct cflayer *layer) | |
355 | { | |
356 | int ret; | |
357 | struct cfctrl *cfctrl = container_obj(layer); | |
358 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
359 | if (!pkt) { | |
360 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
361 | return; | |
362 | } | |
363 | cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE); | |
364 | init_info(cfpkt_info(pkt), cfctrl); | |
365 | ret = | |
366 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
367 | if (ret < 0) | |
368 | cfpkt_destroy(pkt); | |
369 | } | |
370 | ||
371 | void cfctrl_getstartreason_req(struct cflayer *layer) | |
372 | { | |
373 | int ret; | |
374 | struct cfctrl *cfctrl = container_obj(layer); | |
375 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
376 | if (!pkt) { | |
377 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
378 | return; | |
379 | } | |
380 | cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON); | |
381 | init_info(cfpkt_info(pkt), cfctrl); | |
382 | ret = | |
383 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
384 | if (ret < 0) | |
385 | cfpkt_destroy(pkt); | |
386 | } | |
387 | ||
388 | ||
8d545c8f SB |
389 | void cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer) |
390 | { | |
391 | struct cfctrl_request_info *p, *req; | |
392 | struct cfctrl *ctrl = container_obj(layr); | |
393 | spin_lock(&ctrl->info_list_lock); | |
394 | ||
395 | if (ctrl->first_req == NULL) { | |
396 | spin_unlock(&ctrl->info_list_lock); | |
397 | return; | |
398 | } | |
399 | ||
400 | if (ctrl->first_req->client_layer == adap_layer) { | |
401 | ||
402 | req = ctrl->first_req; | |
403 | ctrl->first_req = ctrl->first_req->next; | |
404 | kfree(req); | |
405 | } | |
406 | ||
407 | p = ctrl->first_req; | |
408 | while (p != NULL && p->next != NULL) { | |
409 | if (p->next->client_layer == adap_layer) { | |
410 | ||
411 | req = p->next; | |
412 | p->next = p->next->next; | |
413 | kfree(p->next); | |
414 | } | |
415 | p = p->next; | |
416 | } | |
417 | ||
418 | spin_unlock(&ctrl->info_list_lock); | |
419 | } | |
420 | ||
b482cd20 SB |
421 | static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt) |
422 | { | |
423 | u8 cmdrsp; | |
424 | u8 cmd; | |
425 | int ret = -1; | |
426 | u16 tmp16; | |
427 | u8 len; | |
428 | u8 param[255]; | |
429 | u8 linkid; | |
430 | struct cfctrl *cfctrl = container_obj(layer); | |
431 | struct cfctrl_request_info rsp, *req; | |
432 | ||
433 | ||
434 | cfpkt_extr_head(pkt, &cmdrsp, 1); | |
435 | cmd = cmdrsp & CFCTRL_CMD_MASK; | |
436 | if (cmd != CFCTRL_CMD_LINK_ERR | |
437 | && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) { | |
8d545c8f SB |
438 | if (handle_loop(cfctrl, cmd, pkt) == CAIF_FAILURE) |
439 | cmdrsp |= CFCTRL_ERR_BIT; | |
b482cd20 SB |
440 | } |
441 | ||
442 | switch (cmd) { | |
443 | case CFCTRL_CMD_LINK_SETUP: | |
444 | { | |
445 | enum cfctrl_srv serv; | |
446 | enum cfctrl_srv servtype; | |
447 | u8 endpoint; | |
448 | u8 physlinkid; | |
449 | u8 prio; | |
450 | u8 tmp; | |
451 | u32 tmp32; | |
452 | u8 *cp; | |
453 | int i; | |
454 | struct cfctrl_link_param linkparam; | |
455 | memset(&linkparam, 0, sizeof(linkparam)); | |
456 | ||
457 | cfpkt_extr_head(pkt, &tmp, 1); | |
458 | ||
459 | serv = tmp & CFCTRL_SRV_MASK; | |
460 | linkparam.linktype = serv; | |
461 | ||
462 | servtype = tmp >> 4; | |
463 | linkparam.chtype = servtype; | |
464 | ||
465 | cfpkt_extr_head(pkt, &tmp, 1); | |
466 | physlinkid = tmp & 0x07; | |
467 | prio = tmp >> 3; | |
468 | ||
469 | linkparam.priority = prio; | |
470 | linkparam.phyid = physlinkid; | |
471 | cfpkt_extr_head(pkt, &endpoint, 1); | |
472 | linkparam.endpoint = endpoint & 0x03; | |
473 | ||
474 | switch (serv) { | |
475 | case CFCTRL_SRV_VEI: | |
476 | case CFCTRL_SRV_DBG: | |
8d545c8f SB |
477 | if (CFCTRL_ERR_BIT & cmdrsp) |
478 | break; | |
b482cd20 SB |
479 | /* Link ID */ |
480 | cfpkt_extr_head(pkt, &linkid, 1); | |
481 | break; | |
482 | case CFCTRL_SRV_VIDEO: | |
483 | cfpkt_extr_head(pkt, &tmp, 1); | |
484 | linkparam.u.video.connid = tmp; | |
8d545c8f SB |
485 | if (CFCTRL_ERR_BIT & cmdrsp) |
486 | break; | |
b482cd20 SB |
487 | /* Link ID */ |
488 | cfpkt_extr_head(pkt, &linkid, 1); | |
489 | break; | |
490 | ||
491 | case CFCTRL_SRV_DATAGRAM: | |
492 | cfpkt_extr_head(pkt, &tmp32, 4); | |
493 | linkparam.u.datagram.connid = | |
494 | le32_to_cpu(tmp32); | |
8d545c8f SB |
495 | if (CFCTRL_ERR_BIT & cmdrsp) |
496 | break; | |
b482cd20 SB |
497 | /* Link ID */ |
498 | cfpkt_extr_head(pkt, &linkid, 1); | |
499 | break; | |
500 | case CFCTRL_SRV_RFM: | |
501 | /* Construct a frame, convert | |
502 | * DatagramConnectionID | |
503 | * to network format long and copy it out... | |
504 | */ | |
505 | cfpkt_extr_head(pkt, &tmp32, 4); | |
506 | linkparam.u.rfm.connid = | |
507 | le32_to_cpu(tmp32); | |
508 | cp = (u8 *) linkparam.u.rfm.volume; | |
509 | for (cfpkt_extr_head(pkt, &tmp, 1); | |
510 | cfpkt_more(pkt) && tmp != '\0'; | |
511 | cfpkt_extr_head(pkt, &tmp, 1)) | |
512 | *cp++ = tmp; | |
513 | *cp = '\0'; | |
514 | ||
8d545c8f SB |
515 | if (CFCTRL_ERR_BIT & cmdrsp) |
516 | break; | |
b482cd20 SB |
517 | /* Link ID */ |
518 | cfpkt_extr_head(pkt, &linkid, 1); | |
519 | ||
520 | break; | |
521 | case CFCTRL_SRV_UTIL: | |
522 | /* Construct a frame, convert | |
523 | * DatagramConnectionID | |
524 | * to network format long and copy it out... | |
525 | */ | |
526 | /* Fifosize KB */ | |
527 | cfpkt_extr_head(pkt, &tmp16, 2); | |
528 | linkparam.u.utility.fifosize_kb = | |
529 | le16_to_cpu(tmp16); | |
530 | /* Fifosize bufs */ | |
531 | cfpkt_extr_head(pkt, &tmp16, 2); | |
532 | linkparam.u.utility.fifosize_bufs = | |
533 | le16_to_cpu(tmp16); | |
534 | /* name */ | |
535 | cp = (u8 *) linkparam.u.utility.name; | |
536 | caif_assert(sizeof(linkparam.u.utility.name) | |
537 | >= UTILITY_NAME_LENGTH); | |
538 | for (i = 0; | |
539 | i < UTILITY_NAME_LENGTH | |
540 | && cfpkt_more(pkt); i++) { | |
541 | cfpkt_extr_head(pkt, &tmp, 1); | |
542 | *cp++ = tmp; | |
543 | } | |
544 | /* Length */ | |
545 | cfpkt_extr_head(pkt, &len, 1); | |
546 | linkparam.u.utility.paramlen = len; | |
547 | /* Param Data */ | |
548 | cp = linkparam.u.utility.params; | |
549 | while (cfpkt_more(pkt) && len--) { | |
550 | cfpkt_extr_head(pkt, &tmp, 1); | |
551 | *cp++ = tmp; | |
552 | } | |
8d545c8f SB |
553 | if (CFCTRL_ERR_BIT & cmdrsp) |
554 | break; | |
b482cd20 SB |
555 | /* Link ID */ |
556 | cfpkt_extr_head(pkt, &linkid, 1); | |
557 | /* Length */ | |
558 | cfpkt_extr_head(pkt, &len, 1); | |
559 | /* Param Data */ | |
560 | cfpkt_extr_head(pkt, ¶m, len); | |
561 | break; | |
562 | default: | |
563 | pr_warning("CAIF: %s(): Request setup " | |
564 | "- invalid link type (%d)", | |
565 | __func__, serv); | |
566 | goto error; | |
567 | } | |
568 | ||
569 | rsp.cmd = cmd; | |
570 | rsp.param = linkparam; | |
571 | req = cfctrl_remove_req(cfctrl, &rsp); | |
572 | ||
573 | if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) || | |
574 | cfpkt_erroneous(pkt)) { | |
575 | pr_err("CAIF: %s(): Invalid O/E bit or parse " | |
576 | "error on CAIF control channel", | |
577 | __func__); | |
578 | cfctrl->res.reject_rsp(cfctrl->serv.layer.up, | |
579 | 0, | |
580 | req ? req->client_layer | |
581 | : NULL); | |
582 | } else { | |
583 | cfctrl->res.linksetup_rsp(cfctrl->serv. | |
584 | layer.up, linkid, | |
585 | serv, physlinkid, | |
586 | req ? req-> | |
587 | client_layer : NULL); | |
588 | } | |
589 | ||
590 | if (req != NULL) | |
591 | kfree(req); | |
592 | } | |
593 | break; | |
594 | case CFCTRL_CMD_LINK_DESTROY: | |
595 | cfpkt_extr_head(pkt, &linkid, 1); | |
8d545c8f | 596 | cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid); |
b482cd20 SB |
597 | break; |
598 | case CFCTRL_CMD_LINK_ERR: | |
599 | pr_err("CAIF: %s(): Frame Error Indication received\n", | |
600 | __func__); | |
601 | cfctrl->res.linkerror_ind(); | |
602 | break; | |
603 | case CFCTRL_CMD_ENUM: | |
604 | cfctrl->res.enum_rsp(); | |
605 | break; | |
606 | case CFCTRL_CMD_SLEEP: | |
607 | cfctrl->res.sleep_rsp(); | |
608 | break; | |
609 | case CFCTRL_CMD_WAKE: | |
610 | cfctrl->res.wake_rsp(); | |
611 | break; | |
612 | case CFCTRL_CMD_LINK_RECONF: | |
613 | cfctrl->res.restart_rsp(); | |
614 | break; | |
615 | case CFCTRL_CMD_RADIO_SET: | |
616 | cfctrl->res.radioset_rsp(); | |
617 | break; | |
618 | default: | |
619 | pr_err("CAIF: %s(): Unrecognized Control Frame\n", __func__); | |
620 | goto error; | |
621 | break; | |
622 | } | |
623 | ret = 0; | |
624 | error: | |
625 | cfpkt_destroy(pkt); | |
626 | return ret; | |
627 | } | |
628 | ||
629 | static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
630 | int phyid) | |
631 | { | |
632 | struct cfctrl *this = container_obj(layr); | |
633 | switch (ctrl) { | |
634 | case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: | |
635 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
636 | spin_lock(&this->info_list_lock); | |
637 | if (this->first_req != NULL) { | |
8d545c8f | 638 | pr_debug("CAIF: %s(): Received flow off in " |
b482cd20 SB |
639 | "control layer", __func__); |
640 | } | |
641 | spin_unlock(&this->info_list_lock); | |
642 | break; | |
643 | default: | |
644 | break; | |
645 | } | |
646 | } | |
647 | ||
648 | #ifndef CAIF_NO_LOOP | |
649 | static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt) | |
650 | { | |
651 | static int last_linkid; | |
652 | u8 linkid, linktype, tmp; | |
653 | switch (cmd) { | |
654 | case CFCTRL_CMD_LINK_SETUP: | |
655 | spin_lock(&ctrl->loop_linkid_lock); | |
656 | for (linkid = last_linkid + 1; linkid < 255; linkid++) | |
657 | if (!ctrl->loop_linkused[linkid]) | |
658 | goto found; | |
659 | for (linkid = last_linkid - 1; linkid > 0; linkid--) | |
660 | if (!ctrl->loop_linkused[linkid]) | |
661 | goto found; | |
662 | spin_unlock(&ctrl->loop_linkid_lock); | |
8d545c8f | 663 | pr_err("CAIF: %s(): Out of link-ids\n", __func__); |
b482cd20 SB |
664 | return -EINVAL; |
665 | found: | |
666 | if (!ctrl->loop_linkused[linkid]) | |
667 | ctrl->loop_linkused[linkid] = 1; | |
668 | ||
669 | last_linkid = linkid; | |
670 | ||
671 | cfpkt_add_trail(pkt, &linkid, 1); | |
672 | spin_unlock(&ctrl->loop_linkid_lock); | |
673 | cfpkt_peek_head(pkt, &linktype, 1); | |
674 | if (linktype == CFCTRL_SRV_UTIL) { | |
675 | tmp = 0x01; | |
676 | cfpkt_add_trail(pkt, &tmp, 1); | |
677 | cfpkt_add_trail(pkt, &tmp, 1); | |
678 | } | |
679 | break; | |
680 | ||
681 | case CFCTRL_CMD_LINK_DESTROY: | |
682 | spin_lock(&ctrl->loop_linkid_lock); | |
683 | cfpkt_peek_head(pkt, &linkid, 1); | |
684 | ctrl->loop_linkused[linkid] = 0; | |
685 | spin_unlock(&ctrl->loop_linkid_lock); | |
686 | break; | |
687 | default: | |
688 | break; | |
689 | } | |
690 | return CAIF_SUCCESS; | |
691 | } | |
692 | #endif |