Commit | Line | Data |
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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 | ||
b482cd20 SB |
20 | #ifdef CAIF_NO_LOOP |
21 | static int handle_loop(struct cfctrl *ctrl, | |
22 | int cmd, struct cfpkt *pkt){ | |
2aa40aef | 23 | return -1; |
b482cd20 SB |
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 | ||
34 | struct cflayer *cfctrl_create(void) | |
35 | { | |
8d545c8f | 36 | struct dev_info dev_info; |
b482cd20 | 37 | struct cfctrl *this = |
7ac2ed0c JP |
38 | kzalloc(sizeof(struct cfctrl), GFP_ATOMIC); |
39 | if (!this) | |
b482cd20 | 40 | return NULL; |
b482cd20 | 41 | caif_assert(offsetof(struct cfctrl, serv.layer) == 0); |
8d545c8f SB |
42 | memset(&dev_info, 0, sizeof(dev_info)); |
43 | dev_info.id = 0xff; | |
b1c74247 | 44 | cfsrvl_init(&this->serv, 0, &dev_info, false); |
b482cd20 SB |
45 | atomic_set(&this->req_seq_no, 1); |
46 | atomic_set(&this->rsp_seq_no, 1); | |
b482cd20 SB |
47 | this->serv.layer.receive = cfctrl_recv; |
48 | sprintf(this->serv.layer.name, "ctrl"); | |
49 | this->serv.layer.ctrlcmd = cfctrl_ctrlcmd; | |
c85c2951 | 50 | #ifndef CAIF_NO_LOOP |
b482cd20 | 51 | spin_lock_init(&this->loop_linkid_lock); |
c85c2951 | 52 | this->loop_linkid = 1; |
53 | #endif | |
7aecf494 SB |
54 | spin_lock_init(&this->info_list_lock); |
55 | INIT_LIST_HEAD(&this->list); | |
b482cd20 SB |
56 | return &this->serv.layer; |
57 | } | |
58 | ||
c85c2951 | 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 | ||
73d6ac63 SH |
73 | static bool param_eq(const struct cfctrl_link_param *p1, |
74 | const struct cfctrl_link_param *p2) | |
b482cd20 SB |
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 | ||
73d6ac63 SH |
116 | static bool cfctrl_req_eq(const struct cfctrl_request_info *r1, |
117 | const struct cfctrl_request_info *r2) | |
b482cd20 SB |
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 */ | |
73d6ac63 | 128 | static void cfctrl_insert_req(struct cfctrl *ctrl, |
b482cd20 SB |
129 | struct cfctrl_request_info *req) |
130 | { | |
c85c2951 | 131 | spin_lock_bh(&ctrl->info_list_lock); |
b482cd20 SB |
132 | atomic_inc(&ctrl->req_seq_no); |
133 | req->sequence_no = atomic_read(&ctrl->req_seq_no); | |
7aecf494 | 134 | list_add_tail(&req->list, &ctrl->list); |
c85c2951 | 135 | spin_unlock_bh(&ctrl->info_list_lock); |
b482cd20 SB |
136 | } |
137 | ||
b482cd20 | 138 | /* Compare and remove request */ |
73d6ac63 SH |
139 | static struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl, |
140 | struct cfctrl_request_info *req) | |
b482cd20 | 141 | { |
7aecf494 | 142 | struct cfctrl_request_info *p, *tmp, *first; |
b482cd20 | 143 | |
7aecf494 | 144 | first = list_first_entry(&ctrl->list, struct cfctrl_request_info, list); |
b482cd20 | 145 | |
7aecf494 SB |
146 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { |
147 | if (cfctrl_req_eq(req, p)) { | |
148 | if (p != first) | |
b31fa5ba | 149 | pr_warn("Requests are not received in order\n"); |
7aecf494 | 150 | |
b482cd20 | 151 | atomic_set(&ctrl->rsp_seq_no, |
7aecf494 SB |
152 | p->sequence_no); |
153 | list_del(&p->list); | |
154 | goto out; | |
b482cd20 | 155 | } |
b482cd20 | 156 | } |
7aecf494 SB |
157 | p = NULL; |
158 | out: | |
7aecf494 | 159 | return p; |
b482cd20 SB |
160 | } |
161 | ||
162 | struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer) | |
163 | { | |
164 | struct cfctrl *this = container_obj(layer); | |
165 | return &this->res; | |
166 | } | |
167 | ||
b482cd20 SB |
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 | ||
175 | void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid) | |
176 | { | |
177 | struct cfctrl *cfctrl = container_obj(layer); | |
b482cd20 | 178 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); |
0e5a1174 | 179 | struct cflayer *dn = cfctrl->serv.layer.dn; |
7ac2ed0c | 180 | if (!pkt) |
b482cd20 | 181 | return; |
0e5a1174 | 182 | if (!dn) { |
183 | pr_debug("not able to send enum request\n"); | |
184 | return; | |
185 | } | |
b482cd20 SB |
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); | |
0e5a1174 | 192 | dn->transmit(dn, pkt); |
b482cd20 SB |
193 | } |
194 | ||
8d545c8f | 195 | int cfctrl_linkup_request(struct cflayer *layer, |
b482cd20 SB |
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]; | |
c85c2951 | 206 | struct cfpkt *pkt; |
0e5a1174 | 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 | } | |
c85c2951 | 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); | |
7ac2ed0c | 222 | if (!pkt) |
8d545c8f | 223 | return -ENOMEM; |
b482cd20 | 224 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP); |
c85c2951 | 225 | cfpkt_addbdy(pkt, (param->chtype << 4) | param->linktype); |
226 | cfpkt_addbdy(pkt, (param->priority << 3) | param->phyid); | |
b482cd20 SB |
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: | |
b31fa5ba JP |
266 | pr_warn("Request setup of bad link type = %d\n", |
267 | param->linktype); | |
8d545c8f | 268 | return -EINVAL; |
b482cd20 | 269 | } |
49afa55b | 270 | req = kzalloc(sizeof(*req), GFP_KERNEL); |
7ac2ed0c | 271 | if (!req) |
8d545c8f | 272 | return -ENOMEM; |
b482cd20 SB |
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); | |
8d545c8f SB |
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 | */ | |
b482cd20 SB |
283 | cfpkt_info(pkt)->dev_info->id = param->phyid; |
284 | ret = | |
0e5a1174 | 285 | dn->transmit(dn, pkt); |
b482cd20 | 286 | if (ret < 0) { |
c85c2951 | 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; | |
b482cd20 | 294 | } |
8d545c8f | 295 | return 0; |
b482cd20 SB |
296 | } |
297 | ||
298 | int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid, | |
299 | struct cflayer *client) | |
300 | { | |
301 | int ret; | |
302 | struct cfctrl *cfctrl = container_obj(layer); | |
303 | struct cfpkt *pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
0e5a1174 | 304 | struct cflayer *dn = cfctrl->serv.layer.dn; |
305 | ||
7ac2ed0c | 306 | if (!pkt) |
b482cd20 | 307 | return -ENOMEM; |
0e5a1174 | 308 | |
309 | if (!dn) { | |
310 | pr_debug("not able to send link-down request\n"); | |
311 | return -ENODEV; | |
312 | } | |
313 | ||
b482cd20 SB |
314 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY); |
315 | cfpkt_addbdy(pkt, channelid); | |
316 | init_info(cfpkt_info(pkt), cfctrl); | |
317 | ret = | |
0e5a1174 | 318 | dn->transmit(dn, pkt); |
c85c2951 | 319 | #ifndef CAIF_NO_LOOP |
320 | cfctrl->loop_linkused[channelid] = 0; | |
321 | #endif | |
b482cd20 SB |
322 | return ret; |
323 | } | |
324 | ||
c85c2951 | 325 | int cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer) |
8d545c8f | 326 | { |
7aecf494 | 327 | struct cfctrl_request_info *p, *tmp; |
8d545c8f | 328 | struct cfctrl *ctrl = container_obj(layr); |
c85c2951 | 329 | int found = 0; |
330 | spin_lock_bh(&ctrl->info_list_lock); | |
7aecf494 SB |
331 | |
332 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { | |
333 | if (p->client_layer == adap_layer) { | |
7aecf494 SB |
334 | list_del(&p->list); |
335 | kfree(p); | |
c85c2951 | 336 | found++; |
8d545c8f | 337 | } |
8d545c8f SB |
338 | } |
339 | ||
c85c2951 | 340 | spin_unlock_bh(&ctrl->info_list_lock); |
341 | return found; | |
8d545c8f SB |
342 | } |
343 | ||
b482cd20 SB |
344 | static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt) |
345 | { | |
346 | u8 cmdrsp; | |
347 | u8 cmd; | |
348 | int ret = -1; | |
349 | u16 tmp16; | |
350 | u8 len; | |
351 | u8 param[255]; | |
352 | u8 linkid; | |
353 | struct cfctrl *cfctrl = container_obj(layer); | |
354 | struct cfctrl_request_info rsp, *req; | |
355 | ||
356 | ||
357 | cfpkt_extr_head(pkt, &cmdrsp, 1); | |
358 | cmd = cmdrsp & CFCTRL_CMD_MASK; | |
359 | if (cmd != CFCTRL_CMD_LINK_ERR | |
96796ea8 | 360 | && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp) |
361 | && CFCTRL_ERR_BIT != (CFCTRL_ERR_BIT & cmdrsp)) { | |
2aa40aef | 362 | if (handle_loop(cfctrl, cmd, pkt) != 0) |
8d545c8f | 363 | cmdrsp |= CFCTRL_ERR_BIT; |
b482cd20 SB |
364 | } |
365 | ||
366 | switch (cmd) { | |
367 | case CFCTRL_CMD_LINK_SETUP: | |
368 | { | |
369 | enum cfctrl_srv serv; | |
370 | enum cfctrl_srv servtype; | |
371 | u8 endpoint; | |
372 | u8 physlinkid; | |
373 | u8 prio; | |
374 | u8 tmp; | |
375 | u32 tmp32; | |
376 | u8 *cp; | |
377 | int i; | |
378 | struct cfctrl_link_param linkparam; | |
379 | memset(&linkparam, 0, sizeof(linkparam)); | |
380 | ||
381 | cfpkt_extr_head(pkt, &tmp, 1); | |
382 | ||
383 | serv = tmp & CFCTRL_SRV_MASK; | |
384 | linkparam.linktype = serv; | |
385 | ||
386 | servtype = tmp >> 4; | |
387 | linkparam.chtype = servtype; | |
388 | ||
389 | cfpkt_extr_head(pkt, &tmp, 1); | |
390 | physlinkid = tmp & 0x07; | |
391 | prio = tmp >> 3; | |
392 | ||
393 | linkparam.priority = prio; | |
394 | linkparam.phyid = physlinkid; | |
395 | cfpkt_extr_head(pkt, &endpoint, 1); | |
396 | linkparam.endpoint = endpoint & 0x03; | |
397 | ||
398 | switch (serv) { | |
399 | case CFCTRL_SRV_VEI: | |
400 | case CFCTRL_SRV_DBG: | |
8d545c8f SB |
401 | if (CFCTRL_ERR_BIT & cmdrsp) |
402 | break; | |
b482cd20 SB |
403 | /* Link ID */ |
404 | cfpkt_extr_head(pkt, &linkid, 1); | |
405 | break; | |
406 | case CFCTRL_SRV_VIDEO: | |
407 | cfpkt_extr_head(pkt, &tmp, 1); | |
408 | linkparam.u.video.connid = tmp; | |
8d545c8f SB |
409 | if (CFCTRL_ERR_BIT & cmdrsp) |
410 | break; | |
b482cd20 SB |
411 | /* Link ID */ |
412 | cfpkt_extr_head(pkt, &linkid, 1); | |
413 | break; | |
414 | ||
415 | case CFCTRL_SRV_DATAGRAM: | |
416 | cfpkt_extr_head(pkt, &tmp32, 4); | |
417 | linkparam.u.datagram.connid = | |
418 | le32_to_cpu(tmp32); | |
8d545c8f SB |
419 | if (CFCTRL_ERR_BIT & cmdrsp) |
420 | break; | |
b482cd20 SB |
421 | /* Link ID */ |
422 | cfpkt_extr_head(pkt, &linkid, 1); | |
423 | break; | |
424 | case CFCTRL_SRV_RFM: | |
425 | /* Construct a frame, convert | |
426 | * DatagramConnectionID | |
427 | * to network format long and copy it out... | |
428 | */ | |
429 | cfpkt_extr_head(pkt, &tmp32, 4); | |
430 | linkparam.u.rfm.connid = | |
431 | le32_to_cpu(tmp32); | |
432 | cp = (u8 *) linkparam.u.rfm.volume; | |
433 | for (cfpkt_extr_head(pkt, &tmp, 1); | |
434 | cfpkt_more(pkt) && tmp != '\0'; | |
435 | cfpkt_extr_head(pkt, &tmp, 1)) | |
436 | *cp++ = tmp; | |
437 | *cp = '\0'; | |
438 | ||
8d545c8f SB |
439 | if (CFCTRL_ERR_BIT & cmdrsp) |
440 | break; | |
b482cd20 SB |
441 | /* Link ID */ |
442 | cfpkt_extr_head(pkt, &linkid, 1); | |
443 | ||
444 | break; | |
445 | case CFCTRL_SRV_UTIL: | |
446 | /* Construct a frame, convert | |
447 | * DatagramConnectionID | |
448 | * to network format long and copy it out... | |
449 | */ | |
450 | /* Fifosize KB */ | |
451 | cfpkt_extr_head(pkt, &tmp16, 2); | |
452 | linkparam.u.utility.fifosize_kb = | |
453 | le16_to_cpu(tmp16); | |
454 | /* Fifosize bufs */ | |
455 | cfpkt_extr_head(pkt, &tmp16, 2); | |
456 | linkparam.u.utility.fifosize_bufs = | |
457 | le16_to_cpu(tmp16); | |
458 | /* name */ | |
459 | cp = (u8 *) linkparam.u.utility.name; | |
460 | caif_assert(sizeof(linkparam.u.utility.name) | |
461 | >= UTILITY_NAME_LENGTH); | |
462 | for (i = 0; | |
463 | i < UTILITY_NAME_LENGTH | |
464 | && cfpkt_more(pkt); i++) { | |
465 | cfpkt_extr_head(pkt, &tmp, 1); | |
466 | *cp++ = tmp; | |
467 | } | |
468 | /* Length */ | |
469 | cfpkt_extr_head(pkt, &len, 1); | |
470 | linkparam.u.utility.paramlen = len; | |
471 | /* Param Data */ | |
472 | cp = linkparam.u.utility.params; | |
473 | while (cfpkt_more(pkt) && len--) { | |
474 | cfpkt_extr_head(pkt, &tmp, 1); | |
475 | *cp++ = tmp; | |
476 | } | |
8d545c8f SB |
477 | if (CFCTRL_ERR_BIT & cmdrsp) |
478 | break; | |
b482cd20 SB |
479 | /* Link ID */ |
480 | cfpkt_extr_head(pkt, &linkid, 1); | |
481 | /* Length */ | |
482 | cfpkt_extr_head(pkt, &len, 1); | |
483 | /* Param Data */ | |
484 | cfpkt_extr_head(pkt, ¶m, len); | |
485 | break; | |
486 | default: | |
0e5a1174 | 487 | pr_warn("Request setup, invalid type (%d)\n", |
b31fa5ba | 488 | serv); |
b482cd20 SB |
489 | goto error; |
490 | } | |
491 | ||
492 | rsp.cmd = cmd; | |
493 | rsp.param = linkparam; | |
c85c2951 | 494 | spin_lock_bh(&cfctrl->info_list_lock); |
b482cd20 SB |
495 | req = cfctrl_remove_req(cfctrl, &rsp); |
496 | ||
497 | if (CFCTRL_ERR_BIT == (CFCTRL_ERR_BIT & cmdrsp) || | |
498 | cfpkt_erroneous(pkt)) { | |
0e5a1174 | 499 | pr_err("Invalid O/E bit or parse error " |
500 | "on CAIF control channel\n"); | |
b482cd20 SB |
501 | cfctrl->res.reject_rsp(cfctrl->serv.layer.up, |
502 | 0, | |
503 | req ? req->client_layer | |
504 | : NULL); | |
505 | } else { | |
506 | cfctrl->res.linksetup_rsp(cfctrl->serv. | |
507 | layer.up, linkid, | |
508 | serv, physlinkid, | |
509 | req ? req-> | |
510 | client_layer : NULL); | |
511 | } | |
512 | ||
513 | if (req != NULL) | |
514 | kfree(req); | |
c85c2951 | 515 | |
516 | spin_unlock_bh(&cfctrl->info_list_lock); | |
b482cd20 SB |
517 | } |
518 | break; | |
519 | case CFCTRL_CMD_LINK_DESTROY: | |
520 | cfpkt_extr_head(pkt, &linkid, 1); | |
8d545c8f | 521 | cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid); |
b482cd20 SB |
522 | break; |
523 | case CFCTRL_CMD_LINK_ERR: | |
b31fa5ba | 524 | pr_err("Frame Error Indication received\n"); |
b482cd20 SB |
525 | cfctrl->res.linkerror_ind(); |
526 | break; | |
527 | case CFCTRL_CMD_ENUM: | |
528 | cfctrl->res.enum_rsp(); | |
529 | break; | |
530 | case CFCTRL_CMD_SLEEP: | |
531 | cfctrl->res.sleep_rsp(); | |
532 | break; | |
533 | case CFCTRL_CMD_WAKE: | |
534 | cfctrl->res.wake_rsp(); | |
535 | break; | |
536 | case CFCTRL_CMD_LINK_RECONF: | |
537 | cfctrl->res.restart_rsp(); | |
538 | break; | |
539 | case CFCTRL_CMD_RADIO_SET: | |
540 | cfctrl->res.radioset_rsp(); | |
541 | break; | |
542 | default: | |
b31fa5ba | 543 | pr_err("Unrecognized Control Frame\n"); |
b482cd20 SB |
544 | goto error; |
545 | break; | |
546 | } | |
547 | ret = 0; | |
548 | error: | |
549 | cfpkt_destroy(pkt); | |
550 | return ret; | |
551 | } | |
552 | ||
553 | static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
554 | int phyid) | |
555 | { | |
556 | struct cfctrl *this = container_obj(layr); | |
557 | switch (ctrl) { | |
558 | case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: | |
559 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
c85c2951 | 560 | spin_lock_bh(&this->info_list_lock); |
0e5a1174 | 561 | if (!list_empty(&this->list)) |
b31fa5ba | 562 | pr_debug("Received flow off in control layer\n"); |
c85c2951 | 563 | spin_unlock_bh(&this->info_list_lock); |
b482cd20 | 564 | break; |
c85c2951 | 565 | case _CAIF_CTRLCMD_PHYIF_DOWN_IND: { |
566 | struct cfctrl_request_info *p, *tmp; | |
567 | ||
568 | /* Find all connect request and report failure */ | |
569 | spin_lock_bh(&this->info_list_lock); | |
570 | list_for_each_entry_safe(p, tmp, &this->list, list) { | |
571 | if (p->param.phyid == phyid) { | |
572 | list_del(&p->list); | |
573 | p->client_layer->ctrlcmd(p->client_layer, | |
574 | CAIF_CTRLCMD_INIT_FAIL_RSP, | |
575 | phyid); | |
576 | kfree(p); | |
577 | } | |
578 | } | |
579 | spin_unlock_bh(&this->info_list_lock); | |
580 | break; | |
581 | } | |
b482cd20 SB |
582 | default: |
583 | break; | |
584 | } | |
585 | } | |
586 | ||
587 | #ifndef CAIF_NO_LOOP | |
588 | static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt) | |
589 | { | |
590 | static int last_linkid; | |
c85c2951 | 591 | static int dec; |
b482cd20 SB |
592 | u8 linkid, linktype, tmp; |
593 | switch (cmd) { | |
594 | case CFCTRL_CMD_LINK_SETUP: | |
c85c2951 | 595 | spin_lock_bh(&ctrl->loop_linkid_lock); |
596 | if (!dec) { | |
96796ea8 | 597 | for (linkid = last_linkid + 1; linkid < 254; linkid++) |
c85c2951 | 598 | if (!ctrl->loop_linkused[linkid]) |
599 | goto found; | |
600 | } | |
601 | dec = 1; | |
96796ea8 | 602 | for (linkid = last_linkid - 1; linkid > 1; linkid--) |
b482cd20 SB |
603 | if (!ctrl->loop_linkused[linkid]) |
604 | goto found; | |
c85c2951 | 605 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
96796ea8 | 606 | return -1; |
b482cd20 | 607 | found: |
c85c2951 | 608 | if (linkid < 10) |
609 | dec = 0; | |
610 | ||
b482cd20 SB |
611 | if (!ctrl->loop_linkused[linkid]) |
612 | ctrl->loop_linkused[linkid] = 1; | |
613 | ||
614 | last_linkid = linkid; | |
615 | ||
616 | cfpkt_add_trail(pkt, &linkid, 1); | |
c85c2951 | 617 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
618 | cfpkt_peek_head(pkt, &linktype, 1); |
619 | if (linktype == CFCTRL_SRV_UTIL) { | |
620 | tmp = 0x01; | |
621 | cfpkt_add_trail(pkt, &tmp, 1); | |
622 | cfpkt_add_trail(pkt, &tmp, 1); | |
623 | } | |
624 | break; | |
625 | ||
626 | case CFCTRL_CMD_LINK_DESTROY: | |
c85c2951 | 627 | spin_lock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
628 | cfpkt_peek_head(pkt, &linkid, 1); |
629 | ctrl->loop_linkused[linkid] = 0; | |
c85c2951 | 630 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
631 | break; |
632 | default: | |
633 | break; | |
634 | } | |
2aa40aef | 635 | return 0; |
b482cd20 SB |
636 | } |
637 | #endif |