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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 | ||
b31fa5ba JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
8 | ||
b482cd20 SB |
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 | ||
21 | #ifdef CAIF_NO_LOOP | |
22 | static int handle_loop(struct cfctrl *ctrl, | |
23 | int cmd, struct cfpkt *pkt){ | |
2aa40aef | 24 | return -1; |
b482cd20 SB |
25 | } |
26 | #else | |
27 | static int handle_loop(struct cfctrl *ctrl, | |
28 | int cmd, struct cfpkt *pkt); | |
29 | #endif | |
30 | static int cfctrl_recv(struct cflayer *layr, struct cfpkt *pkt); | |
31 | static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
32 | int phyid); | |
33 | ||
34 | ||
35 | struct cflayer *cfctrl_create(void) | |
36 | { | |
8d545c8f | 37 | struct dev_info dev_info; |
b482cd20 SB |
38 | struct cfctrl *this = |
39 | kmalloc(sizeof(struct cfctrl), GFP_ATOMIC); | |
40 | if (!this) { | |
b31fa5ba | 41 | pr_warn("Out of memory\n"); |
b482cd20 SB |
42 | return NULL; |
43 | } | |
44 | caif_assert(offsetof(struct cfctrl, serv.layer) == 0); | |
8d545c8f SB |
45 | memset(&dev_info, 0, sizeof(dev_info)); |
46 | dev_info.id = 0xff; | |
b482cd20 | 47 | memset(this, 0, sizeof(*this)); |
b1c74247 | 48 | cfsrvl_init(&this->serv, 0, &dev_info, false); |
b482cd20 SB |
49 | atomic_set(&this->req_seq_no, 1); |
50 | atomic_set(&this->rsp_seq_no, 1); | |
b482cd20 SB |
51 | this->serv.layer.receive = cfctrl_recv; |
52 | sprintf(this->serv.layer.name, "ctrl"); | |
53 | this->serv.layer.ctrlcmd = cfctrl_ctrlcmd; | |
54 | spin_lock_init(&this->loop_linkid_lock); | |
7aecf494 SB |
55 | spin_lock_init(&this->info_list_lock); |
56 | INIT_LIST_HEAD(&this->list); | |
b482cd20 SB |
57 | this->loop_linkid = 1; |
58 | return &this->serv.layer; | |
59 | } | |
60 | ||
61 | static bool param_eq(struct cfctrl_link_param *p1, struct cfctrl_link_param *p2) | |
62 | { | |
63 | bool eq = | |
64 | p1->linktype == p2->linktype && | |
65 | p1->priority == p2->priority && | |
66 | p1->phyid == p2->phyid && | |
67 | p1->endpoint == p2->endpoint && p1->chtype == p2->chtype; | |
68 | ||
69 | if (!eq) | |
70 | return false; | |
71 | ||
72 | switch (p1->linktype) { | |
73 | case CFCTRL_SRV_VEI: | |
74 | return true; | |
75 | case CFCTRL_SRV_DATAGRAM: | |
76 | return p1->u.datagram.connid == p2->u.datagram.connid; | |
77 | case CFCTRL_SRV_RFM: | |
78 | return | |
79 | p1->u.rfm.connid == p2->u.rfm.connid && | |
80 | strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0; | |
81 | case CFCTRL_SRV_UTIL: | |
82 | return | |
83 | p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb | |
84 | && p1->u.utility.fifosize_bufs == | |
85 | p2->u.utility.fifosize_bufs | |
86 | && strcmp(p1->u.utility.name, p2->u.utility.name) == 0 | |
87 | && p1->u.utility.paramlen == p2->u.utility.paramlen | |
88 | && memcmp(p1->u.utility.params, p2->u.utility.params, | |
89 | p1->u.utility.paramlen) == 0; | |
90 | ||
91 | case CFCTRL_SRV_VIDEO: | |
92 | return p1->u.video.connid == p2->u.video.connid; | |
93 | case CFCTRL_SRV_DBG: | |
94 | return true; | |
95 | case CFCTRL_SRV_DECM: | |
96 | return false; | |
97 | default: | |
98 | return false; | |
99 | } | |
100 | return false; | |
101 | } | |
102 | ||
103 | bool cfctrl_req_eq(struct cfctrl_request_info *r1, | |
104 | struct cfctrl_request_info *r2) | |
105 | { | |
106 | if (r1->cmd != r2->cmd) | |
107 | return false; | |
108 | if (r1->cmd == CFCTRL_CMD_LINK_SETUP) | |
109 | return param_eq(&r1->param, &r2->param); | |
110 | else | |
111 | return r1->channel_id == r2->channel_id; | |
112 | } | |
113 | ||
114 | /* Insert request at the end */ | |
115 | void cfctrl_insert_req(struct cfctrl *ctrl, | |
116 | struct cfctrl_request_info *req) | |
117 | { | |
b482cd20 | 118 | spin_lock(&ctrl->info_list_lock); |
b482cd20 SB |
119 | atomic_inc(&ctrl->req_seq_no); |
120 | req->sequence_no = atomic_read(&ctrl->req_seq_no); | |
7aecf494 | 121 | list_add_tail(&req->list, &ctrl->list); |
b482cd20 SB |
122 | spin_unlock(&ctrl->info_list_lock); |
123 | } | |
124 | ||
b482cd20 SB |
125 | /* Compare and remove request */ |
126 | struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl, | |
127 | struct cfctrl_request_info *req) | |
128 | { | |
7aecf494 | 129 | struct cfctrl_request_info *p, *tmp, *first; |
b482cd20 SB |
130 | |
131 | spin_lock(&ctrl->info_list_lock); | |
7aecf494 | 132 | first = list_first_entry(&ctrl->list, struct cfctrl_request_info, list); |
b482cd20 | 133 | |
7aecf494 SB |
134 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { |
135 | if (cfctrl_req_eq(req, p)) { | |
136 | if (p != first) | |
b31fa5ba | 137 | pr_warn("Requests are not received in order\n"); |
7aecf494 | 138 | |
b482cd20 | 139 | atomic_set(&ctrl->rsp_seq_no, |
7aecf494 SB |
140 | p->sequence_no); |
141 | list_del(&p->list); | |
142 | goto out; | |
b482cd20 | 143 | } |
b482cd20 | 144 | } |
7aecf494 SB |
145 | p = NULL; |
146 | out: | |
b482cd20 | 147 | spin_unlock(&ctrl->info_list_lock); |
7aecf494 | 148 | return p; |
b482cd20 SB |
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) { | |
b31fa5ba | 180 | pr_warn("Out of memory\n"); |
b482cd20 SB |
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) { | |
b31fa5ba | 192 | pr_err("Could not transmit enum message\n"); |
b482cd20 SB |
193 | cfpkt_destroy(pkt); |
194 | } | |
195 | } | |
196 | ||
8d545c8f | 197 | int cfctrl_linkup_request(struct cflayer *layer, |
b482cd20 SB |
198 | struct cfctrl_link_param *param, |
199 | struct cflayer *user_layer) | |
200 | { | |
201 | struct cfctrl *cfctrl = container_obj(layer); | |
202 | u32 tmp32; | |
203 | u16 tmp16; | |
204 | u8 tmp8; | |
205 | struct cfctrl_request_info *req; | |
206 | int ret; | |
207 | char utility_name[16]; | |
208 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
209 | if (!pkt) { | |
b31fa5ba | 210 | pr_warn("Out of memory\n"); |
8d545c8f | 211 | return -ENOMEM; |
b482cd20 SB |
212 | } |
213 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP); | |
214 | cfpkt_addbdy(pkt, (param->chtype << 4) + param->linktype); | |
215 | cfpkt_addbdy(pkt, (param->priority << 3) + param->phyid); | |
216 | cfpkt_addbdy(pkt, param->endpoint & 0x03); | |
217 | ||
218 | switch (param->linktype) { | |
219 | case CFCTRL_SRV_VEI: | |
220 | break; | |
221 | case CFCTRL_SRV_VIDEO: | |
222 | cfpkt_addbdy(pkt, (u8) param->u.video.connid); | |
223 | break; | |
224 | case CFCTRL_SRV_DBG: | |
225 | break; | |
226 | case CFCTRL_SRV_DATAGRAM: | |
227 | tmp32 = cpu_to_le32(param->u.datagram.connid); | |
228 | cfpkt_add_body(pkt, &tmp32, 4); | |
229 | break; | |
230 | case CFCTRL_SRV_RFM: | |
231 | /* Construct a frame, convert DatagramConnectionID to network | |
232 | * format long and copy it out... | |
233 | */ | |
234 | tmp32 = cpu_to_le32(param->u.rfm.connid); | |
235 | cfpkt_add_body(pkt, &tmp32, 4); | |
236 | /* Add volume name, including zero termination... */ | |
237 | cfpkt_add_body(pkt, param->u.rfm.volume, | |
238 | strlen(param->u.rfm.volume) + 1); | |
239 | break; | |
240 | case CFCTRL_SRV_UTIL: | |
241 | tmp16 = cpu_to_le16(param->u.utility.fifosize_kb); | |
242 | cfpkt_add_body(pkt, &tmp16, 2); | |
243 | tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs); | |
244 | cfpkt_add_body(pkt, &tmp16, 2); | |
245 | memset(utility_name, 0, sizeof(utility_name)); | |
246 | strncpy(utility_name, param->u.utility.name, | |
247 | UTILITY_NAME_LENGTH - 1); | |
248 | cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH); | |
249 | tmp8 = param->u.utility.paramlen; | |
250 | cfpkt_add_body(pkt, &tmp8, 1); | |
251 | cfpkt_add_body(pkt, param->u.utility.params, | |
252 | param->u.utility.paramlen); | |
253 | break; | |
254 | default: | |
b31fa5ba JP |
255 | pr_warn("Request setup of bad link type = %d\n", |
256 | param->linktype); | |
8d545c8f | 257 | return -EINVAL; |
b482cd20 | 258 | } |
49afa55b | 259 | req = kzalloc(sizeof(*req), GFP_KERNEL); |
b482cd20 | 260 | if (!req) { |
b31fa5ba | 261 | pr_warn("Out of memory\n"); |
8d545c8f | 262 | return -ENOMEM; |
b482cd20 | 263 | } |
b482cd20 SB |
264 | req->client_layer = user_layer; |
265 | req->cmd = CFCTRL_CMD_LINK_SETUP; | |
266 | req->param = *param; | |
267 | cfctrl_insert_req(cfctrl, req); | |
268 | init_info(cfpkt_info(pkt), cfctrl); | |
8d545c8f SB |
269 | /* |
270 | * NOTE:Always send linkup and linkdown request on the same | |
271 | * device as the payload. Otherwise old queued up payload | |
272 | * might arrive with the newly allocated channel ID. | |
273 | */ | |
b482cd20 SB |
274 | cfpkt_info(pkt)->dev_info->id = param->phyid; |
275 | ret = | |
276 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
277 | if (ret < 0) { | |
b31fa5ba | 278 | pr_err("Could not transmit linksetup request\n"); |
b482cd20 | 279 | cfpkt_destroy(pkt); |
8d545c8f | 280 | return -ENODEV; |
b482cd20 | 281 | } |
8d545c8f | 282 | return 0; |
b482cd20 SB |
283 | } |
284 | ||
285 | int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid, | |
286 | struct cflayer *client) | |
287 | { | |
288 | int ret; | |
289 | struct cfctrl *cfctrl = container_obj(layer); | |
290 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
291 | if (!pkt) { | |
b31fa5ba | 292 | pr_warn("Out of memory\n"); |
b482cd20 SB |
293 | return -ENOMEM; |
294 | } | |
b482cd20 SB |
295 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY); |
296 | cfpkt_addbdy(pkt, channelid); | |
297 | init_info(cfpkt_info(pkt), cfctrl); | |
298 | ret = | |
299 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
300 | if (ret < 0) { | |
b31fa5ba | 301 | pr_err("Could not transmit link-down request\n"); |
b482cd20 SB |
302 | cfpkt_destroy(pkt); |
303 | } | |
304 | return ret; | |
305 | } | |
306 | ||
307 | void cfctrl_sleep_req(struct cflayer *layer) | |
308 | { | |
309 | int ret; | |
310 | struct cfctrl *cfctrl = container_obj(layer); | |
311 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
312 | if (!pkt) { | |
b31fa5ba | 313 | pr_warn("Out of memory\n"); |
b482cd20 SB |
314 | return; |
315 | } | |
316 | cfpkt_addbdy(pkt, CFCTRL_CMD_SLEEP); | |
317 | init_info(cfpkt_info(pkt), cfctrl); | |
318 | ret = | |
319 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
320 | if (ret < 0) | |
321 | cfpkt_destroy(pkt); | |
322 | } | |
323 | ||
324 | void cfctrl_wake_req(struct cflayer *layer) | |
325 | { | |
326 | int ret; | |
327 | struct cfctrl *cfctrl = container_obj(layer); | |
328 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
329 | if (!pkt) { | |
b31fa5ba | 330 | pr_warn("Out of memory\n"); |
b482cd20 SB |
331 | return; |
332 | } | |
333 | cfpkt_addbdy(pkt, CFCTRL_CMD_WAKE); | |
334 | init_info(cfpkt_info(pkt), cfctrl); | |
335 | ret = | |
336 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
337 | if (ret < 0) | |
338 | cfpkt_destroy(pkt); | |
339 | } | |
340 | ||
341 | void cfctrl_getstartreason_req(struct cflayer *layer) | |
342 | { | |
343 | int ret; | |
344 | struct cfctrl *cfctrl = container_obj(layer); | |
345 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
346 | if (!pkt) { | |
b31fa5ba | 347 | pr_warn("Out of memory\n"); |
b482cd20 SB |
348 | return; |
349 | } | |
350 | cfpkt_addbdy(pkt, CFCTRL_CMD_START_REASON); | |
351 | init_info(cfpkt_info(pkt), cfctrl); | |
352 | ret = | |
353 | cfctrl->serv.layer.dn->transmit(cfctrl->serv.layer.dn, pkt); | |
354 | if (ret < 0) | |
355 | cfpkt_destroy(pkt); | |
356 | } | |
357 | ||
358 | ||
8d545c8f SB |
359 | void cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer) |
360 | { | |
7aecf494 | 361 | struct cfctrl_request_info *p, *tmp; |
8d545c8f SB |
362 | struct cfctrl *ctrl = container_obj(layr); |
363 | spin_lock(&ctrl->info_list_lock); | |
7aecf494 SB |
364 | |
365 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { | |
366 | if (p->client_layer == adap_layer) { | |
47d1ff17 | 367 | pr_debug("cancel req :%d\n", p->sequence_no); |
7aecf494 SB |
368 | list_del(&p->list); |
369 | kfree(p); | |
8d545c8f | 370 | } |
8d545c8f SB |
371 | } |
372 | ||
373 | spin_unlock(&ctrl->info_list_lock); | |
374 | } | |
375 | ||
b482cd20 SB |
376 | static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt) |
377 | { | |
378 | u8 cmdrsp; | |
379 | u8 cmd; | |
380 | int ret = -1; | |
381 | u16 tmp16; | |
382 | u8 len; | |
383 | u8 param[255]; | |
384 | u8 linkid; | |
385 | struct cfctrl *cfctrl = container_obj(layer); | |
386 | struct cfctrl_request_info rsp, *req; | |
387 | ||
388 | ||
389 | cfpkt_extr_head(pkt, &cmdrsp, 1); | |
390 | cmd = cmdrsp & CFCTRL_CMD_MASK; | |
391 | if (cmd != CFCTRL_CMD_LINK_ERR | |
392 | && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp)) { | |
2aa40aef | 393 | if (handle_loop(cfctrl, cmd, pkt) != 0) |
8d545c8f | 394 | cmdrsp |= CFCTRL_ERR_BIT; |
b482cd20 SB |
395 | } |
396 | ||
397 | switch (cmd) { | |
398 | case CFCTRL_CMD_LINK_SETUP: | |
399 | { | |
400 | enum cfctrl_srv serv; | |
401 | enum cfctrl_srv servtype; | |
402 | u8 endpoint; | |
403 | u8 physlinkid; | |
404 | u8 prio; | |
405 | u8 tmp; | |
406 | u32 tmp32; | |
407 | u8 *cp; | |
408 | int i; | |
409 | struct cfctrl_link_param linkparam; | |
410 | memset(&linkparam, 0, sizeof(linkparam)); | |
411 | ||
412 | cfpkt_extr_head(pkt, &tmp, 1); | |
413 | ||
414 | serv = tmp & CFCTRL_SRV_MASK; | |
415 | linkparam.linktype = serv; | |
416 | ||
417 | servtype = tmp >> 4; | |
418 | linkparam.chtype = servtype; | |
419 | ||
420 | cfpkt_extr_head(pkt, &tmp, 1); | |
421 | physlinkid = tmp & 0x07; | |
422 | prio = tmp >> 3; | |
423 | ||
424 | linkparam.priority = prio; | |
425 | linkparam.phyid = physlinkid; | |
426 | cfpkt_extr_head(pkt, &endpoint, 1); | |
427 | linkparam.endpoint = endpoint & 0x03; | |
428 | ||
429 | switch (serv) { | |
430 | case CFCTRL_SRV_VEI: | |
431 | case CFCTRL_SRV_DBG: | |
8d545c8f SB |
432 | if (CFCTRL_ERR_BIT & cmdrsp) |
433 | break; | |
b482cd20 SB |
434 | /* Link ID */ |
435 | cfpkt_extr_head(pkt, &linkid, 1); | |
436 | break; | |
437 | case CFCTRL_SRV_VIDEO: | |
438 | cfpkt_extr_head(pkt, &tmp, 1); | |
439 | linkparam.u.video.connid = tmp; | |
8d545c8f SB |
440 | if (CFCTRL_ERR_BIT & cmdrsp) |
441 | break; | |
b482cd20 SB |
442 | /* Link ID */ |
443 | cfpkt_extr_head(pkt, &linkid, 1); | |
444 | break; | |
445 | ||
446 | case CFCTRL_SRV_DATAGRAM: | |
447 | cfpkt_extr_head(pkt, &tmp32, 4); | |
448 | linkparam.u.datagram.connid = | |
449 | le32_to_cpu(tmp32); | |
8d545c8f SB |
450 | if (CFCTRL_ERR_BIT & cmdrsp) |
451 | break; | |
b482cd20 SB |
452 | /* Link ID */ |
453 | cfpkt_extr_head(pkt, &linkid, 1); | |
454 | break; | |
455 | case CFCTRL_SRV_RFM: | |
456 | /* Construct a frame, convert | |
457 | * DatagramConnectionID | |
458 | * to network format long and copy it out... | |
459 | */ | |
460 | cfpkt_extr_head(pkt, &tmp32, 4); | |
461 | linkparam.u.rfm.connid = | |
462 | le32_to_cpu(tmp32); | |
463 | cp = (u8 *) linkparam.u.rfm.volume; | |
464 | for (cfpkt_extr_head(pkt, &tmp, 1); | |
465 | cfpkt_more(pkt) && tmp != '\0'; | |
466 | cfpkt_extr_head(pkt, &tmp, 1)) | |
467 | *cp++ = tmp; | |
468 | *cp = '\0'; | |
469 | ||
8d545c8f SB |
470 | if (CFCTRL_ERR_BIT & cmdrsp) |
471 | break; | |
b482cd20 SB |
472 | /* Link ID */ |
473 | cfpkt_extr_head(pkt, &linkid, 1); | |
474 | ||
475 | break; | |
476 | case CFCTRL_SRV_UTIL: | |
477 | /* Construct a frame, convert | |
478 | * DatagramConnectionID | |
479 | * to network format long and copy it out... | |
480 | */ | |
481 | /* Fifosize KB */ | |
482 | cfpkt_extr_head(pkt, &tmp16, 2); | |
483 | linkparam.u.utility.fifosize_kb = | |
484 | le16_to_cpu(tmp16); | |
485 | /* Fifosize bufs */ | |
486 | cfpkt_extr_head(pkt, &tmp16, 2); | |
487 | linkparam.u.utility.fifosize_bufs = | |
488 | le16_to_cpu(tmp16); | |
489 | /* name */ | |
490 | cp = (u8 *) linkparam.u.utility.name; | |
491 | caif_assert(sizeof(linkparam.u.utility.name) | |
492 | >= UTILITY_NAME_LENGTH); | |
493 | for (i = 0; | |
494 | i < UTILITY_NAME_LENGTH | |
495 | && cfpkt_more(pkt); i++) { | |
496 | cfpkt_extr_head(pkt, &tmp, 1); | |
497 | *cp++ = tmp; | |
498 | } | |
499 | /* Length */ | |
500 | cfpkt_extr_head(pkt, &len, 1); | |
501 | linkparam.u.utility.paramlen = len; | |
502 | /* Param Data */ | |
503 | cp = linkparam.u.utility.params; | |
504 | while (cfpkt_more(pkt) && len--) { | |
505 | cfpkt_extr_head(pkt, &tmp, 1); | |
506 | *cp++ = tmp; | |
507 | } | |
8d545c8f SB |
508 | if (CFCTRL_ERR_BIT & cmdrsp) |
509 | break; | |
b482cd20 SB |
510 | /* Link ID */ |
511 | cfpkt_extr_head(pkt, &linkid, 1); | |
512 | /* Length */ | |
513 | cfpkt_extr_head(pkt, &len, 1); | |
514 | /* Param Data */ | |
515 | cfpkt_extr_head(pkt, ¶m, len); | |
516 | break; | |
517 | default: | |
b31fa5ba JP |
518 | pr_warn("Request setup - invalid link type (%d)\n", |
519 | serv); | |
b482cd20 SB |
520 | goto error; |
521 | } | |
522 | ||
523 | rsp.cmd = cmd; | |
524 | rsp.param = linkparam; | |
525 | req = cfctrl_remove_req(cfctrl, &rsp); | |
526 | ||
527 | if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) || | |
528 | cfpkt_erroneous(pkt)) { | |
b31fa5ba | 529 | pr_err("Invalid O/E bit or parse error on CAIF control channel\n"); |
b482cd20 SB |
530 | cfctrl->res.reject_rsp(cfctrl->serv.layer.up, |
531 | 0, | |
532 | req ? req->client_layer | |
533 | : NULL); | |
534 | } else { | |
535 | cfctrl->res.linksetup_rsp(cfctrl->serv. | |
536 | layer.up, linkid, | |
537 | serv, physlinkid, | |
538 | req ? req-> | |
539 | client_layer : NULL); | |
540 | } | |
541 | ||
542 | if (req != NULL) | |
543 | kfree(req); | |
544 | } | |
545 | break; | |
546 | case CFCTRL_CMD_LINK_DESTROY: | |
547 | cfpkt_extr_head(pkt, &linkid, 1); | |
8d545c8f | 548 | cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid); |
b482cd20 SB |
549 | break; |
550 | case CFCTRL_CMD_LINK_ERR: | |
b31fa5ba | 551 | pr_err("Frame Error Indication received\n"); |
b482cd20 SB |
552 | cfctrl->res.linkerror_ind(); |
553 | break; | |
554 | case CFCTRL_CMD_ENUM: | |
555 | cfctrl->res.enum_rsp(); | |
556 | break; | |
557 | case CFCTRL_CMD_SLEEP: | |
558 | cfctrl->res.sleep_rsp(); | |
559 | break; | |
560 | case CFCTRL_CMD_WAKE: | |
561 | cfctrl->res.wake_rsp(); | |
562 | break; | |
563 | case CFCTRL_CMD_LINK_RECONF: | |
564 | cfctrl->res.restart_rsp(); | |
565 | break; | |
566 | case CFCTRL_CMD_RADIO_SET: | |
567 | cfctrl->res.radioset_rsp(); | |
568 | break; | |
569 | default: | |
b31fa5ba | 570 | pr_err("Unrecognized Control Frame\n"); |
b482cd20 SB |
571 | goto error; |
572 | break; | |
573 | } | |
574 | ret = 0; | |
575 | error: | |
576 | cfpkt_destroy(pkt); | |
577 | return ret; | |
578 | } | |
579 | ||
580 | static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
581 | int phyid) | |
582 | { | |
583 | struct cfctrl *this = container_obj(layr); | |
584 | switch (ctrl) { | |
585 | case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: | |
586 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
587 | spin_lock(&this->info_list_lock); | |
7aecf494 | 588 | if (!list_empty(&this->list)) { |
b31fa5ba | 589 | pr_debug("Received flow off in control layer\n"); |
b482cd20 SB |
590 | } |
591 | spin_unlock(&this->info_list_lock); | |
592 | break; | |
593 | default: | |
594 | break; | |
595 | } | |
596 | } | |
597 | ||
598 | #ifndef CAIF_NO_LOOP | |
599 | static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt) | |
600 | { | |
601 | static int last_linkid; | |
602 | u8 linkid, linktype, tmp; | |
603 | switch (cmd) { | |
604 | case CFCTRL_CMD_LINK_SETUP: | |
605 | spin_lock(&ctrl->loop_linkid_lock); | |
606 | for (linkid = last_linkid + 1; linkid < 255; linkid++) | |
607 | if (!ctrl->loop_linkused[linkid]) | |
608 | goto found; | |
609 | for (linkid = last_linkid - 1; linkid > 0; linkid--) | |
610 | if (!ctrl->loop_linkused[linkid]) | |
611 | goto found; | |
612 | spin_unlock(&ctrl->loop_linkid_lock); | |
b31fa5ba | 613 | pr_err("Out of link-ids\n"); |
b482cd20 SB |
614 | return -EINVAL; |
615 | found: | |
616 | if (!ctrl->loop_linkused[linkid]) | |
617 | ctrl->loop_linkused[linkid] = 1; | |
618 | ||
619 | last_linkid = linkid; | |
620 | ||
621 | cfpkt_add_trail(pkt, &linkid, 1); | |
622 | spin_unlock(&ctrl->loop_linkid_lock); | |
623 | cfpkt_peek_head(pkt, &linktype, 1); | |
624 | if (linktype == CFCTRL_SRV_UTIL) { | |
625 | tmp = 0x01; | |
626 | cfpkt_add_trail(pkt, &tmp, 1); | |
627 | cfpkt_add_trail(pkt, &tmp, 1); | |
628 | } | |
629 | break; | |
630 | ||
631 | case CFCTRL_CMD_LINK_DESTROY: | |
632 | spin_lock(&ctrl->loop_linkid_lock); | |
633 | cfpkt_peek_head(pkt, &linkid, 1); | |
634 | ctrl->loop_linkused[linkid] = 0; | |
635 | spin_unlock(&ctrl->loop_linkid_lock); | |
636 | break; | |
637 | default: | |
638 | break; | |
639 | } | |
2aa40aef | 640 | return 0; |
b482cd20 SB |
641 | } |
642 | #endif |