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b482cd20 SB |
1 | /* |
2 | * Copyright (C) ST-Ericsson AB 2010 | |
26ee65e6 | 3 | * Author: Sjur Brendeland |
b482cd20 SB |
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> | |
44764812 | 12 | #include <linux/pkt_sched.h> |
b482cd20 SB |
13 | #include <net/caif/caif_layer.h> |
14 | #include <net/caif/cfpkt.h> | |
15 | #include <net/caif/cfctrl.h> | |
16 | ||
17 | #define container_obj(layr) container_of(layr, struct cfctrl, serv.layer) | |
18 | #define UTILITY_NAME_LENGTH 16 | |
19 | #define CFPKT_CTRL_PKT_LEN 20 | |
20 | ||
b482cd20 SB |
21 | #ifdef CAIF_NO_LOOP |
22 | static int handle_loop(struct cfctrl *ctrl, | |
3bffc475 | 23 | int cmd, struct cfpkt *pkt){ |
2aa40aef | 24 | return -1; |
b482cd20 SB |
25 | } |
26 | #else | |
27 | static int handle_loop(struct cfctrl *ctrl, | |
3bffc475 | 28 | int cmd, struct cfpkt *pkt); |
b482cd20 SB |
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 | 38 | struct cfctrl *this = |
7ac2ed0c JP |
39 | kzalloc(sizeof(struct cfctrl), GFP_ATOMIC); |
40 | if (!this) | |
b482cd20 | 41 | return NULL; |
b482cd20 | 42 | caif_assert(offsetof(struct cfctrl, serv.layer) == 0); |
8d545c8f SB |
43 | memset(&dev_info, 0, sizeof(dev_info)); |
44 | dev_info.id = 0xff; | |
b1c74247 | 45 | cfsrvl_init(&this->serv, 0, &dev_info, false); |
b482cd20 SB |
46 | atomic_set(&this->req_seq_no, 1); |
47 | atomic_set(&this->rsp_seq_no, 1); | |
b482cd20 SB |
48 | this->serv.layer.receive = cfctrl_recv; |
49 | sprintf(this->serv.layer.name, "ctrl"); | |
50 | this->serv.layer.ctrlcmd = cfctrl_ctrlcmd; | |
c85c2951 | 51 | #ifndef CAIF_NO_LOOP |
b482cd20 | 52 | spin_lock_init(&this->loop_linkid_lock); |
c85c2951 | 53 | this->loop_linkid = 1; |
54 | #endif | |
7aecf494 SB |
55 | spin_lock_init(&this->info_list_lock); |
56 | INIT_LIST_HEAD(&this->list); | |
b482cd20 SB |
57 | return &this->serv.layer; |
58 | } | |
59 | ||
c85c2951 | 60 | void cfctrl_remove(struct cflayer *layer) |
61 | { | |
62 | struct cfctrl_request_info *p, *tmp; | |
63 | struct cfctrl *ctrl = container_obj(layer); | |
64 | ||
65 | spin_lock_bh(&ctrl->info_list_lock); | |
66 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { | |
67 | list_del(&p->list); | |
68 | kfree(p); | |
69 | } | |
70 | spin_unlock_bh(&ctrl->info_list_lock); | |
71 | kfree(layer); | |
72 | } | |
73 | ||
73d6ac63 | 74 | static bool param_eq(const struct cfctrl_link_param *p1, |
3bffc475 | 75 | const struct cfctrl_link_param *p2) |
b482cd20 SB |
76 | { |
77 | bool eq = | |
78 | p1->linktype == p2->linktype && | |
79 | p1->priority == p2->priority && | |
80 | p1->phyid == p2->phyid && | |
81 | p1->endpoint == p2->endpoint && p1->chtype == p2->chtype; | |
82 | ||
83 | if (!eq) | |
84 | return false; | |
85 | ||
86 | switch (p1->linktype) { | |
87 | case CFCTRL_SRV_VEI: | |
88 | return true; | |
89 | case CFCTRL_SRV_DATAGRAM: | |
90 | return p1->u.datagram.connid == p2->u.datagram.connid; | |
91 | case CFCTRL_SRV_RFM: | |
92 | return | |
93 | p1->u.rfm.connid == p2->u.rfm.connid && | |
94 | strcmp(p1->u.rfm.volume, p2->u.rfm.volume) == 0; | |
95 | case CFCTRL_SRV_UTIL: | |
96 | return | |
97 | p1->u.utility.fifosize_kb == p2->u.utility.fifosize_kb | |
98 | && p1->u.utility.fifosize_bufs == | |
99 | p2->u.utility.fifosize_bufs | |
100 | && strcmp(p1->u.utility.name, p2->u.utility.name) == 0 | |
101 | && p1->u.utility.paramlen == p2->u.utility.paramlen | |
102 | && memcmp(p1->u.utility.params, p2->u.utility.params, | |
103 | p1->u.utility.paramlen) == 0; | |
104 | ||
105 | case CFCTRL_SRV_VIDEO: | |
106 | return p1->u.video.connid == p2->u.video.connid; | |
107 | case CFCTRL_SRV_DBG: | |
108 | return true; | |
109 | case CFCTRL_SRV_DECM: | |
110 | return false; | |
111 | default: | |
112 | return false; | |
113 | } | |
114 | return false; | |
115 | } | |
116 | ||
73d6ac63 SH |
117 | static bool cfctrl_req_eq(const struct cfctrl_request_info *r1, |
118 | const struct cfctrl_request_info *r2) | |
b482cd20 SB |
119 | { |
120 | if (r1->cmd != r2->cmd) | |
121 | return false; | |
122 | if (r1->cmd == CFCTRL_CMD_LINK_SETUP) | |
123 | return param_eq(&r1->param, &r2->param); | |
124 | else | |
125 | return r1->channel_id == r2->channel_id; | |
126 | } | |
127 | ||
128 | /* Insert request at the end */ | |
73d6ac63 | 129 | static void cfctrl_insert_req(struct cfctrl *ctrl, |
b482cd20 SB |
130 | struct cfctrl_request_info *req) |
131 | { | |
c85c2951 | 132 | spin_lock_bh(&ctrl->info_list_lock); |
b482cd20 SB |
133 | atomic_inc(&ctrl->req_seq_no); |
134 | req->sequence_no = atomic_read(&ctrl->req_seq_no); | |
7aecf494 | 135 | list_add_tail(&req->list, &ctrl->list); |
c85c2951 | 136 | spin_unlock_bh(&ctrl->info_list_lock); |
b482cd20 SB |
137 | } |
138 | ||
b482cd20 | 139 | /* Compare and remove request */ |
73d6ac63 SH |
140 | static struct cfctrl_request_info *cfctrl_remove_req(struct cfctrl *ctrl, |
141 | struct cfctrl_request_info *req) | |
b482cd20 | 142 | { |
7aecf494 | 143 | struct cfctrl_request_info *p, *tmp, *first; |
b482cd20 | 144 | |
7aecf494 | 145 | first = list_first_entry(&ctrl->list, struct cfctrl_request_info, list); |
b482cd20 | 146 | |
7aecf494 SB |
147 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { |
148 | if (cfctrl_req_eq(req, p)) { | |
149 | if (p != first) | |
b31fa5ba | 150 | pr_warn("Requests are not received in order\n"); |
7aecf494 | 151 | |
b482cd20 | 152 | atomic_set(&ctrl->rsp_seq_no, |
7aecf494 SB |
153 | p->sequence_no); |
154 | list_del(&p->list); | |
155 | goto out; | |
b482cd20 | 156 | } |
b482cd20 | 157 | } |
7aecf494 SB |
158 | p = NULL; |
159 | out: | |
7aecf494 | 160 | return p; |
b482cd20 SB |
161 | } |
162 | ||
163 | struct cfctrl_rsp *cfctrl_get_respfuncs(struct cflayer *layer) | |
164 | { | |
165 | struct cfctrl *this = container_obj(layer); | |
166 | return &this->res; | |
167 | } | |
168 | ||
b482cd20 SB |
169 | static void init_info(struct caif_payload_info *info, struct cfctrl *cfctrl) |
170 | { | |
171 | info->hdr_len = 0; | |
172 | info->channel_id = cfctrl->serv.layer.id; | |
173 | info->dev_info = &cfctrl->serv.dev_info; | |
174 | } | |
175 | ||
176 | void cfctrl_enum_req(struct cflayer *layer, u8 physlinkid) | |
177 | { | |
f315fd35 | 178 | struct cfpkt *pkt; |
b482cd20 | 179 | struct cfctrl *cfctrl = container_obj(layer); |
0e5a1174 | 180 | struct cflayer *dn = cfctrl->serv.layer.dn; |
f315fd35 | 181 | |
0e5a1174 | 182 | if (!dn) { |
183 | pr_debug("not able to send enum request\n"); | |
184 | return; | |
185 | } | |
f315fd35 KLX |
186 | pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); |
187 | if (!pkt) | |
188 | return; | |
b482cd20 SB |
189 | caif_assert(offsetof(struct cfctrl, serv.layer) == 0); |
190 | init_info(cfpkt_info(pkt), cfctrl); | |
191 | cfpkt_info(pkt)->dev_info->id = physlinkid; | |
192 | cfctrl->serv.dev_info.id = physlinkid; | |
193 | cfpkt_addbdy(pkt, CFCTRL_CMD_ENUM); | |
194 | cfpkt_addbdy(pkt, physlinkid); | |
44764812 | 195 | cfpkt_set_prio(pkt, TC_PRIO_CONTROL); |
0e5a1174 | 196 | dn->transmit(dn, pkt); |
b482cd20 SB |
197 | } |
198 | ||
8d545c8f | 199 | int cfctrl_linkup_request(struct cflayer *layer, |
3bffc475 SMP |
200 | struct cfctrl_link_param *param, |
201 | struct cflayer *user_layer) | |
b482cd20 SB |
202 | { |
203 | struct cfctrl *cfctrl = container_obj(layer); | |
204 | u32 tmp32; | |
205 | u16 tmp16; | |
206 | u8 tmp8; | |
207 | struct cfctrl_request_info *req; | |
208 | int ret; | |
209 | char utility_name[16]; | |
c85c2951 | 210 | struct cfpkt *pkt; |
0e5a1174 | 211 | struct cflayer *dn = cfctrl->serv.layer.dn; |
212 | ||
213 | if (!dn) { | |
214 | pr_debug("not able to send linkup request\n"); | |
215 | return -ENODEV; | |
216 | } | |
c85c2951 | 217 | |
218 | if (cfctrl_cancel_req(layer, user_layer) > 0) { | |
219 | /* Slight Paranoia, check if already connecting */ | |
220 | pr_err("Duplicate connect request for same client\n"); | |
221 | WARN_ON(1); | |
222 | return -EALREADY; | |
223 | } | |
224 | ||
225 | pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); | |
7ac2ed0c | 226 | if (!pkt) |
8d545c8f | 227 | return -ENOMEM; |
b482cd20 | 228 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_SETUP); |
c85c2951 | 229 | cfpkt_addbdy(pkt, (param->chtype << 4) | param->linktype); |
230 | cfpkt_addbdy(pkt, (param->priority << 3) | param->phyid); | |
b482cd20 SB |
231 | cfpkt_addbdy(pkt, param->endpoint & 0x03); |
232 | ||
233 | switch (param->linktype) { | |
234 | case CFCTRL_SRV_VEI: | |
235 | break; | |
236 | case CFCTRL_SRV_VIDEO: | |
237 | cfpkt_addbdy(pkt, (u8) param->u.video.connid); | |
238 | break; | |
239 | case CFCTRL_SRV_DBG: | |
240 | break; | |
241 | case CFCTRL_SRV_DATAGRAM: | |
242 | tmp32 = cpu_to_le32(param->u.datagram.connid); | |
243 | cfpkt_add_body(pkt, &tmp32, 4); | |
244 | break; | |
245 | case CFCTRL_SRV_RFM: | |
246 | /* Construct a frame, convert DatagramConnectionID to network | |
247 | * format long and copy it out... | |
248 | */ | |
249 | tmp32 = cpu_to_le32(param->u.rfm.connid); | |
250 | cfpkt_add_body(pkt, &tmp32, 4); | |
251 | /* Add volume name, including zero termination... */ | |
252 | cfpkt_add_body(pkt, param->u.rfm.volume, | |
253 | strlen(param->u.rfm.volume) + 1); | |
254 | break; | |
255 | case CFCTRL_SRV_UTIL: | |
256 | tmp16 = cpu_to_le16(param->u.utility.fifosize_kb); | |
257 | cfpkt_add_body(pkt, &tmp16, 2); | |
258 | tmp16 = cpu_to_le16(param->u.utility.fifosize_bufs); | |
259 | cfpkt_add_body(pkt, &tmp16, 2); | |
260 | memset(utility_name, 0, sizeof(utility_name)); | |
3dc2fa47 XW |
261 | strlcpy(utility_name, param->u.utility.name, |
262 | UTILITY_NAME_LENGTH); | |
b482cd20 SB |
263 | cfpkt_add_body(pkt, utility_name, UTILITY_NAME_LENGTH); |
264 | tmp8 = param->u.utility.paramlen; | |
265 | cfpkt_add_body(pkt, &tmp8, 1); | |
266 | cfpkt_add_body(pkt, param->u.utility.params, | |
267 | param->u.utility.paramlen); | |
268 | break; | |
269 | default: | |
b31fa5ba JP |
270 | pr_warn("Request setup of bad link type = %d\n", |
271 | param->linktype); | |
8d545c8f | 272 | return -EINVAL; |
b482cd20 | 273 | } |
49afa55b | 274 | req = kzalloc(sizeof(*req), GFP_KERNEL); |
7ac2ed0c | 275 | if (!req) |
8d545c8f | 276 | return -ENOMEM; |
b482cd20 SB |
277 | req->client_layer = user_layer; |
278 | req->cmd = CFCTRL_CMD_LINK_SETUP; | |
279 | req->param = *param; | |
280 | cfctrl_insert_req(cfctrl, req); | |
281 | init_info(cfpkt_info(pkt), cfctrl); | |
8d545c8f SB |
282 | /* |
283 | * NOTE:Always send linkup and linkdown request on the same | |
284 | * device as the payload. Otherwise old queued up payload | |
285 | * might arrive with the newly allocated channel ID. | |
286 | */ | |
b482cd20 | 287 | cfpkt_info(pkt)->dev_info->id = param->phyid; |
44764812 | 288 | cfpkt_set_prio(pkt, TC_PRIO_CONTROL); |
b482cd20 | 289 | ret = |
0e5a1174 | 290 | dn->transmit(dn, pkt); |
b482cd20 | 291 | if (ret < 0) { |
c85c2951 | 292 | int count; |
293 | ||
294 | count = cfctrl_cancel_req(&cfctrl->serv.layer, | |
295 | user_layer); | |
0c1db731 | 296 | if (count != 1) { |
c85c2951 | 297 | pr_err("Could not remove request (%d)", count); |
298 | return -ENODEV; | |
0c1db731 | 299 | } |
b482cd20 | 300 | } |
8d545c8f | 301 | return 0; |
b482cd20 SB |
302 | } |
303 | ||
304 | int cfctrl_linkdown_req(struct cflayer *layer, u8 channelid, | |
3bffc475 | 305 | struct cflayer *client) |
b482cd20 SB |
306 | { |
307 | int ret; | |
f315fd35 | 308 | struct cfpkt *pkt; |
b482cd20 | 309 | struct cfctrl *cfctrl = container_obj(layer); |
0e5a1174 | 310 | struct cflayer *dn = cfctrl->serv.layer.dn; |
311 | ||
0e5a1174 | 312 | if (!dn) { |
313 | pr_debug("not able to send link-down request\n"); | |
314 | return -ENODEV; | |
315 | } | |
f315fd35 KLX |
316 | pkt = cfpkt_create(CFPKT_CTRL_PKT_LEN); |
317 | if (!pkt) | |
318 | return -ENOMEM; | |
b482cd20 SB |
319 | cfpkt_addbdy(pkt, CFCTRL_CMD_LINK_DESTROY); |
320 | cfpkt_addbdy(pkt, channelid); | |
321 | init_info(cfpkt_info(pkt), cfctrl); | |
44764812 | 322 | cfpkt_set_prio(pkt, TC_PRIO_CONTROL); |
b482cd20 | 323 | ret = |
0e5a1174 | 324 | dn->transmit(dn, pkt); |
c85c2951 | 325 | #ifndef CAIF_NO_LOOP |
326 | cfctrl->loop_linkused[channelid] = 0; | |
327 | #endif | |
b482cd20 SB |
328 | return ret; |
329 | } | |
330 | ||
c85c2951 | 331 | int cfctrl_cancel_req(struct cflayer *layr, struct cflayer *adap_layer) |
8d545c8f | 332 | { |
7aecf494 | 333 | struct cfctrl_request_info *p, *tmp; |
8d545c8f | 334 | struct cfctrl *ctrl = container_obj(layr); |
c85c2951 | 335 | int found = 0; |
336 | spin_lock_bh(&ctrl->info_list_lock); | |
7aecf494 SB |
337 | |
338 | list_for_each_entry_safe(p, tmp, &ctrl->list, list) { | |
339 | if (p->client_layer == adap_layer) { | |
7aecf494 SB |
340 | list_del(&p->list); |
341 | kfree(p); | |
c85c2951 | 342 | found++; |
8d545c8f | 343 | } |
8d545c8f SB |
344 | } |
345 | ||
c85c2951 | 346 | spin_unlock_bh(&ctrl->info_list_lock); |
347 | return found; | |
8d545c8f SB |
348 | } |
349 | ||
b482cd20 SB |
350 | static int cfctrl_recv(struct cflayer *layer, struct cfpkt *pkt) |
351 | { | |
352 | u8 cmdrsp; | |
353 | u8 cmd; | |
354 | int ret = -1; | |
b482cd20 SB |
355 | u8 len; |
356 | u8 param[255]; | |
ce628966 | 357 | u8 linkid = 0; |
b482cd20 SB |
358 | struct cfctrl *cfctrl = container_obj(layer); |
359 | struct cfctrl_request_info rsp, *req; | |
360 | ||
361 | ||
ce628966 | 362 | cmdrsp = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
363 | cmd = cmdrsp & CFCTRL_CMD_MASK; |
364 | if (cmd != CFCTRL_CMD_LINK_ERR | |
96796ea8 | 365 | && CFCTRL_RSP_BIT != (CFCTRL_RSP_BIT & cmdrsp) |
366 | && CFCTRL_ERR_BIT != (CFCTRL_ERR_BIT & cmdrsp)) { | |
2aa40aef | 367 | if (handle_loop(cfctrl, cmd, pkt) != 0) |
8d545c8f | 368 | cmdrsp |= CFCTRL_ERR_BIT; |
b482cd20 SB |
369 | } |
370 | ||
371 | switch (cmd) { | |
372 | case CFCTRL_CMD_LINK_SETUP: | |
373 | { | |
374 | enum cfctrl_srv serv; | |
375 | enum cfctrl_srv servtype; | |
376 | u8 endpoint; | |
377 | u8 physlinkid; | |
378 | u8 prio; | |
379 | u8 tmp; | |
b482cd20 SB |
380 | u8 *cp; |
381 | int i; | |
382 | struct cfctrl_link_param linkparam; | |
383 | memset(&linkparam, 0, sizeof(linkparam)); | |
384 | ||
ce628966 | 385 | tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
386 | |
387 | serv = tmp & CFCTRL_SRV_MASK; | |
388 | linkparam.linktype = serv; | |
389 | ||
390 | servtype = tmp >> 4; | |
391 | linkparam.chtype = servtype; | |
392 | ||
ce628966 | 393 | tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
394 | physlinkid = tmp & 0x07; |
395 | prio = tmp >> 3; | |
396 | ||
397 | linkparam.priority = prio; | |
398 | linkparam.phyid = physlinkid; | |
ce628966 | 399 | endpoint = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
400 | linkparam.endpoint = endpoint & 0x03; |
401 | ||
402 | switch (serv) { | |
403 | case CFCTRL_SRV_VEI: | |
404 | case CFCTRL_SRV_DBG: | |
8d545c8f SB |
405 | if (CFCTRL_ERR_BIT & cmdrsp) |
406 | break; | |
b482cd20 | 407 | /* Link ID */ |
ce628966 | 408 | linkid = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
409 | break; |
410 | case CFCTRL_SRV_VIDEO: | |
ce628966 | 411 | tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 | 412 | linkparam.u.video.connid = tmp; |
8d545c8f SB |
413 | if (CFCTRL_ERR_BIT & cmdrsp) |
414 | break; | |
b482cd20 | 415 | /* Link ID */ |
ce628966 | 416 | linkid = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
417 | break; |
418 | ||
419 | case CFCTRL_SRV_DATAGRAM: | |
b482cd20 | 420 | linkparam.u.datagram.connid = |
ce628966 | 421 | cfpkt_extr_head_u32(pkt); |
8d545c8f SB |
422 | if (CFCTRL_ERR_BIT & cmdrsp) |
423 | break; | |
b482cd20 | 424 | /* Link ID */ |
ce628966 | 425 | linkid = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
426 | break; |
427 | case CFCTRL_SRV_RFM: | |
428 | /* Construct a frame, convert | |
429 | * DatagramConnectionID | |
430 | * to network format long and copy it out... | |
431 | */ | |
b482cd20 | 432 | linkparam.u.rfm.connid = |
ce628966 | 433 | cfpkt_extr_head_u32(pkt); |
b482cd20 | 434 | cp = (u8 *) linkparam.u.rfm.volume; |
ce628966 | 435 | for (tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 | 436 | cfpkt_more(pkt) && tmp != '\0'; |
ce628966 | 437 | tmp = cfpkt_extr_head_u8(pkt)) |
b482cd20 SB |
438 | *cp++ = tmp; |
439 | *cp = '\0'; | |
440 | ||
8d545c8f SB |
441 | if (CFCTRL_ERR_BIT & cmdrsp) |
442 | break; | |
b482cd20 | 443 | /* Link ID */ |
ce628966 | 444 | linkid = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
445 | |
446 | break; | |
447 | case CFCTRL_SRV_UTIL: | |
448 | /* Construct a frame, convert | |
449 | * DatagramConnectionID | |
450 | * to network format long and copy it out... | |
451 | */ | |
452 | /* Fifosize KB */ | |
b482cd20 | 453 | linkparam.u.utility.fifosize_kb = |
ce628966 | 454 | cfpkt_extr_head_u16(pkt); |
b482cd20 | 455 | /* Fifosize bufs */ |
b482cd20 | 456 | linkparam.u.utility.fifosize_bufs = |
ce628966 | 457 | cfpkt_extr_head_u16(pkt); |
b482cd20 SB |
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++) { | |
ce628966 | 465 | tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
466 | *cp++ = tmp; |
467 | } | |
468 | /* Length */ | |
ce628966 | 469 | len = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
470 | linkparam.u.utility.paramlen = len; |
471 | /* Param Data */ | |
472 | cp = linkparam.u.utility.params; | |
473 | while (cfpkt_more(pkt) && len--) { | |
ce628966 | 474 | tmp = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
475 | *cp++ = tmp; |
476 | } | |
8d545c8f SB |
477 | if (CFCTRL_ERR_BIT & cmdrsp) |
478 | break; | |
b482cd20 | 479 | /* Link ID */ |
ce628966 | 480 | linkid = cfpkt_extr_head_u8(pkt); |
b482cd20 | 481 | /* Length */ |
ce628966 | 482 | len = cfpkt_extr_head_u8(pkt); |
b482cd20 SB |
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 | ||
973b1b9a | 513 | kfree(req); |
c85c2951 | 514 | |
515 | spin_unlock_bh(&cfctrl->info_list_lock); | |
b482cd20 SB |
516 | } |
517 | break; | |
518 | case CFCTRL_CMD_LINK_DESTROY: | |
ce628966 | 519 | linkid = cfpkt_extr_head_u8(pkt); |
8d545c8f | 520 | cfctrl->res.linkdestroy_rsp(cfctrl->serv.layer.up, linkid); |
b482cd20 SB |
521 | break; |
522 | case CFCTRL_CMD_LINK_ERR: | |
b31fa5ba | 523 | pr_err("Frame Error Indication received\n"); |
b482cd20 SB |
524 | cfctrl->res.linkerror_ind(); |
525 | break; | |
526 | case CFCTRL_CMD_ENUM: | |
527 | cfctrl->res.enum_rsp(); | |
528 | break; | |
529 | case CFCTRL_CMD_SLEEP: | |
530 | cfctrl->res.sleep_rsp(); | |
531 | break; | |
532 | case CFCTRL_CMD_WAKE: | |
533 | cfctrl->res.wake_rsp(); | |
534 | break; | |
535 | case CFCTRL_CMD_LINK_RECONF: | |
536 | cfctrl->res.restart_rsp(); | |
537 | break; | |
538 | case CFCTRL_CMD_RADIO_SET: | |
539 | cfctrl->res.radioset_rsp(); | |
540 | break; | |
541 | default: | |
b31fa5ba | 542 | pr_err("Unrecognized Control Frame\n"); |
b482cd20 | 543 | goto error; |
b482cd20 SB |
544 | } |
545 | ret = 0; | |
546 | error: | |
547 | cfpkt_destroy(pkt); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | static void cfctrl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, | |
3bffc475 | 552 | int phyid) |
b482cd20 SB |
553 | { |
554 | struct cfctrl *this = container_obj(layr); | |
555 | switch (ctrl) { | |
556 | case _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND: | |
557 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
c85c2951 | 558 | spin_lock_bh(&this->info_list_lock); |
0e5a1174 | 559 | if (!list_empty(&this->list)) |
b31fa5ba | 560 | pr_debug("Received flow off in control layer\n"); |
c85c2951 | 561 | spin_unlock_bh(&this->info_list_lock); |
b482cd20 | 562 | break; |
c85c2951 | 563 | case _CAIF_CTRLCMD_PHYIF_DOWN_IND: { |
564 | struct cfctrl_request_info *p, *tmp; | |
565 | ||
566 | /* Find all connect request and report failure */ | |
567 | spin_lock_bh(&this->info_list_lock); | |
568 | list_for_each_entry_safe(p, tmp, &this->list, list) { | |
569 | if (p->param.phyid == phyid) { | |
570 | list_del(&p->list); | |
571 | p->client_layer->ctrlcmd(p->client_layer, | |
572 | CAIF_CTRLCMD_INIT_FAIL_RSP, | |
573 | phyid); | |
574 | kfree(p); | |
575 | } | |
576 | } | |
577 | spin_unlock_bh(&this->info_list_lock); | |
578 | break; | |
579 | } | |
b482cd20 SB |
580 | default: |
581 | break; | |
582 | } | |
583 | } | |
584 | ||
585 | #ifndef CAIF_NO_LOOP | |
586 | static int handle_loop(struct cfctrl *ctrl, int cmd, struct cfpkt *pkt) | |
587 | { | |
588 | static int last_linkid; | |
c85c2951 | 589 | static int dec; |
b482cd20 SB |
590 | u8 linkid, linktype, tmp; |
591 | switch (cmd) { | |
592 | case CFCTRL_CMD_LINK_SETUP: | |
c85c2951 | 593 | spin_lock_bh(&ctrl->loop_linkid_lock); |
594 | if (!dec) { | |
96796ea8 | 595 | for (linkid = last_linkid + 1; linkid < 254; linkid++) |
c85c2951 | 596 | if (!ctrl->loop_linkused[linkid]) |
597 | goto found; | |
598 | } | |
599 | dec = 1; | |
96796ea8 | 600 | for (linkid = last_linkid - 1; linkid > 1; linkid--) |
b482cd20 SB |
601 | if (!ctrl->loop_linkused[linkid]) |
602 | goto found; | |
c85c2951 | 603 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
96796ea8 | 604 | return -1; |
b482cd20 | 605 | found: |
c85c2951 | 606 | if (linkid < 10) |
607 | dec = 0; | |
608 | ||
b482cd20 SB |
609 | if (!ctrl->loop_linkused[linkid]) |
610 | ctrl->loop_linkused[linkid] = 1; | |
611 | ||
612 | last_linkid = linkid; | |
613 | ||
614 | cfpkt_add_trail(pkt, &linkid, 1); | |
c85c2951 | 615 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
616 | cfpkt_peek_head(pkt, &linktype, 1); |
617 | if (linktype == CFCTRL_SRV_UTIL) { | |
618 | tmp = 0x01; | |
619 | cfpkt_add_trail(pkt, &tmp, 1); | |
620 | cfpkt_add_trail(pkt, &tmp, 1); | |
621 | } | |
622 | break; | |
623 | ||
624 | case CFCTRL_CMD_LINK_DESTROY: | |
c85c2951 | 625 | spin_lock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
626 | cfpkt_peek_head(pkt, &linkid, 1); |
627 | ctrl->loop_linkused[linkid] = 0; | |
c85c2951 | 628 | spin_unlock_bh(&ctrl->loop_linkid_lock); |
b482cd20 SB |
629 | break; |
630 | default: | |
631 | break; | |
632 | } | |
2aa40aef | 633 | return 0; |
b482cd20 SB |
634 | } |
635 | #endif |