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15c9ac0c 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 | #include <linux/kernel.h> | |
7 | #include <linux/stddef.h> | |
6c579906 | 8 | #include <linux/slab.h> |
15c9ac0c SB |
9 | #include <net/caif/caif_layer.h> |
10 | #include <net/caif/cfpkt.h> | |
11 | #include <net/caif/cfcnfg.h> | |
12 | #include <net/caif/cfctrl.h> | |
13 | #include <net/caif/cfmuxl.h> | |
14 | #include <net/caif/cffrml.h> | |
15 | #include <net/caif/cfserl.h> | |
16 | #include <net/caif/cfsrvl.h> | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <asm/atomic.h> | |
20 | ||
21 | #define MAX_PHY_LAYERS 7 | |
22 | #define PHY_NAME_LEN 20 | |
23 | ||
24 | #define container_obj(layr) container_of(layr, struct cfcnfg, layer) | |
25 | ||
26 | /* Information about CAIF physical interfaces held by Config Module in order | |
27 | * to manage physical interfaces | |
28 | */ | |
29 | struct cfcnfg_phyinfo { | |
30 | /* Pointer to the layer below the MUX (framing layer) */ | |
31 | struct cflayer *frm_layer; | |
32 | /* Pointer to the lowest actual physical layer */ | |
33 | struct cflayer *phy_layer; | |
34 | /* Unique identifier of the physical interface */ | |
35 | unsigned int id; | |
36 | /* Preference of the physical in interface */ | |
37 | enum cfcnfg_phy_preference pref; | |
38 | ||
39 | /* Reference count, number of channels using the device */ | |
40 | int phy_ref_count; | |
41 | ||
42 | /* Information about the physical device */ | |
43 | struct dev_info dev_info; | |
44 | }; | |
45 | ||
46 | struct cfcnfg { | |
47 | struct cflayer layer; | |
48 | struct cflayer *ctrl; | |
49 | struct cflayer *mux; | |
50 | u8 last_phyid; | |
51 | struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS]; | |
52 | }; | |
53 | ||
e539d83c | 54 | static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
55 | enum cfctrl_srv serv, u8 phyid, |
56 | struct cflayer *adapt_layer); | |
8d545c8f | 57 | static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id); |
e539d83c | 58 | static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
59 | struct cflayer *adapt_layer); |
60 | static void cfctrl_resp_func(void); | |
61 | static void cfctrl_enum_resp(void); | |
62 | ||
63 | struct cfcnfg *cfcnfg_create(void) | |
64 | { | |
65 | struct cfcnfg *this; | |
66 | struct cfctrl_rsp *resp; | |
67 | /* Initiate this layer */ | |
49afa55b | 68 | this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC); |
15c9ac0c SB |
69 | if (!this) { |
70 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
71 | return NULL; | |
72 | } | |
15c9ac0c SB |
73 | this->mux = cfmuxl_create(); |
74 | if (!this->mux) | |
75 | goto out_of_mem; | |
76 | this->ctrl = cfctrl_create(); | |
77 | if (!this->ctrl) | |
78 | goto out_of_mem; | |
79 | /* Initiate response functions */ | |
80 | resp = cfctrl_get_respfuncs(this->ctrl); | |
81 | resp->enum_rsp = cfctrl_enum_resp; | |
82 | resp->linkerror_ind = cfctrl_resp_func; | |
e539d83c | 83 | resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp; |
15c9ac0c SB |
84 | resp->sleep_rsp = cfctrl_resp_func; |
85 | resp->wake_rsp = cfctrl_resp_func; | |
86 | resp->restart_rsp = cfctrl_resp_func; | |
87 | resp->radioset_rsp = cfctrl_resp_func; | |
e539d83c SB |
88 | resp->linksetup_rsp = cfcnfg_linkup_rsp; |
89 | resp->reject_rsp = cfcnfg_reject_rsp; | |
15c9ac0c SB |
90 | |
91 | this->last_phyid = 1; | |
92 | ||
93 | cfmuxl_set_uplayer(this->mux, this->ctrl, 0); | |
94 | layer_set_dn(this->ctrl, this->mux); | |
95 | layer_set_up(this->ctrl, this); | |
96 | return this; | |
97 | out_of_mem: | |
98 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
99 | kfree(this->mux); | |
100 | kfree(this->ctrl); | |
101 | kfree(this); | |
102 | return NULL; | |
103 | } | |
104 | EXPORT_SYMBOL(cfcnfg_create); | |
105 | ||
106 | void cfcnfg_remove(struct cfcnfg *cfg) | |
107 | { | |
108 | if (cfg) { | |
109 | kfree(cfg->mux); | |
110 | kfree(cfg->ctrl); | |
111 | kfree(cfg); | |
112 | } | |
113 | } | |
114 | ||
115 | static void cfctrl_resp_func(void) | |
116 | { | |
117 | } | |
118 | ||
119 | static void cfctrl_enum_resp(void) | |
120 | { | |
121 | } | |
122 | ||
123 | struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg, | |
124 | enum cfcnfg_phy_preference phy_pref) | |
125 | { | |
126 | u16 i; | |
127 | ||
128 | /* Try to match with specified preference */ | |
129 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
130 | if (cnfg->phy_layers[i].id == i && | |
131 | cnfg->phy_layers[i].pref == phy_pref && | |
132 | cnfg->phy_layers[i].frm_layer != NULL) { | |
133 | caif_assert(cnfg->phy_layers != NULL); | |
134 | caif_assert(cnfg->phy_layers[i].id == i); | |
135 | return &cnfg->phy_layers[i].dev_info; | |
136 | } | |
137 | } | |
138 | /* Otherwise just return something */ | |
139 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
140 | if (cnfg->phy_layers[i].id == i) { | |
141 | caif_assert(cnfg->phy_layers != NULL); | |
142 | caif_assert(cnfg->phy_layers[i].id == i); | |
143 | return &cnfg->phy_layers[i].dev_info; | |
144 | } | |
145 | } | |
146 | ||
147 | return NULL; | |
148 | } | |
149 | ||
150 | static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg, | |
151 | u8 phyid) | |
152 | { | |
153 | int i; | |
154 | /* Try to match with specified preference */ | |
155 | for (i = 0; i < MAX_PHY_LAYERS; i++) | |
156 | if (cnfg->phy_layers[i].frm_layer != NULL && | |
157 | cnfg->phy_layers[i].id == phyid) | |
158 | return &cnfg->phy_layers[i]; | |
159 | return NULL; | |
160 | } | |
161 | ||
162 | int cfcnfg_get_named(struct cfcnfg *cnfg, char *name) | |
163 | { | |
164 | int i; | |
165 | ||
166 | /* Try to match with specified name */ | |
167 | for (i = 0; i < MAX_PHY_LAYERS; i++) { | |
168 | if (cnfg->phy_layers[i].frm_layer != NULL | |
169 | && strcmp(cnfg->phy_layers[i].phy_layer->name, | |
170 | name) == 0) | |
171 | return cnfg->phy_layers[i].frm_layer->id; | |
172 | } | |
173 | return 0; | |
174 | } | |
175 | ||
e539d83c | 176 | int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer) |
15c9ac0c SB |
177 | { |
178 | u8 channel_id = 0; | |
179 | int ret = 0; | |
8d545c8f | 180 | struct cflayer *servl = NULL; |
15c9ac0c SB |
181 | struct cfcnfg_phyinfo *phyinfo = NULL; |
182 | u8 phyid = 0; | |
15c9ac0c SB |
183 | caif_assert(adap_layer != NULL); |
184 | channel_id = adap_layer->id; | |
8d545c8f | 185 | if (adap_layer->dn == NULL || channel_id == 0) { |
15c9ac0c SB |
186 | pr_err("CAIF: %s():adap_layer->id is 0\n", __func__); |
187 | ret = -ENOTCONN; | |
188 | goto end; | |
189 | } | |
8d545c8f SB |
190 | servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id); |
191 | if (servl == NULL) | |
15c9ac0c | 192 | goto end; |
8d545c8f SB |
193 | layer_set_up(servl, NULL); |
194 | ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer); | |
195 | if (servl == NULL) { | |
196 | pr_err("CAIF: %s(): PROTOCOL ERROR " | |
197 | "- Error removing service_layer Channel_Id(%d)", | |
198 | __func__, channel_id); | |
15c9ac0c SB |
199 | ret = -EINVAL; |
200 | goto end; | |
201 | } | |
8d545c8f SB |
202 | caif_assert(channel_id == servl->id); |
203 | if (adap_layer->dn != NULL) { | |
204 | phyid = cfsrvl_getphyid(adap_layer->dn); | |
15c9ac0c | 205 | |
8d545c8f SB |
206 | phyinfo = cfcnfg_get_phyinfo(cnfg, phyid); |
207 | if (phyinfo == NULL) { | |
208 | pr_warning("CAIF: %s(): " | |
209 | "No interface to send disconnect to\n", | |
210 | __func__); | |
211 | ret = -ENODEV; | |
212 | goto end; | |
213 | } | |
214 | if (phyinfo->id != phyid || | |
215 | phyinfo->phy_layer->id != phyid || | |
216 | phyinfo->frm_layer->id != phyid) { | |
217 | pr_err("CAIF: %s(): " | |
218 | "Inconsistency in phy registration\n", | |
219 | __func__); | |
220 | ret = -EINVAL; | |
221 | goto end; | |
222 | } | |
223 | } | |
15c9ac0c SB |
224 | if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 && |
225 | phyinfo->phy_layer != NULL && | |
226 | phyinfo->phy_layer->modemcmd != NULL) { | |
227 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, | |
228 | _CAIF_MODEMCMD_PHYIF_USELESS); | |
229 | } | |
8d545c8f SB |
230 | end: |
231 | cfsrvl_put(servl); | |
232 | cfctrl_cancel_req(cnfg->ctrl, adap_layer); | |
233 | if (adap_layer->ctrlcmd != NULL) | |
234 | adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0); | |
15c9ac0c SB |
235 | return ret; |
236 | ||
237 | } | |
e539d83c | 238 | EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer); |
15c9ac0c | 239 | |
5b208656 SB |
240 | void cfcnfg_release_adap_layer(struct cflayer *adap_layer) |
241 | { | |
242 | if (adap_layer->dn) | |
243 | cfsrvl_put(adap_layer->dn); | |
244 | } | |
245 | EXPORT_SYMBOL(cfcnfg_release_adap_layer); | |
246 | ||
8d545c8f | 247 | static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id) |
15c9ac0c | 248 | { |
15c9ac0c SB |
249 | } |
250 | ||
8d545c8f | 251 | int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, |
15c9ac0c SB |
252 | struct cfctrl_link_param *param, |
253 | struct cflayer *adap_layer) | |
254 | { | |
255 | struct cflayer *frml; | |
256 | if (adap_layer == NULL) { | |
257 | pr_err("CAIF: %s(): adap_layer is zero", __func__); | |
258 | return -EINVAL; | |
259 | } | |
260 | if (adap_layer->receive == NULL) { | |
261 | pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__); | |
262 | return -EINVAL; | |
263 | } | |
264 | if (adap_layer->ctrlcmd == NULL) { | |
265 | pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__); | |
266 | return -EINVAL; | |
267 | } | |
268 | frml = cnfg->phy_layers[param->phyid].frm_layer; | |
269 | if (frml == NULL) { | |
270 | pr_err("CAIF: %s(): Specified PHY type does not exist!", | |
271 | __func__); | |
272 | return -ENODEV; | |
273 | } | |
274 | caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id); | |
275 | caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id == | |
276 | param->phyid); | |
277 | caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id == | |
278 | param->phyid); | |
279 | /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ | |
280 | cfctrl_enum_req(cnfg->ctrl, param->phyid); | |
8d545c8f | 281 | return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); |
15c9ac0c SB |
282 | } |
283 | EXPORT_SYMBOL(cfcnfg_add_adaptation_layer); | |
284 | ||
e539d83c | 285 | static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
286 | struct cflayer *adapt_layer) |
287 | { | |
288 | if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL) | |
289 | adapt_layer->ctrlcmd(adapt_layer, | |
290 | CAIF_CTRLCMD_INIT_FAIL_RSP, 0); | |
291 | } | |
292 | ||
293 | static void | |
e539d83c | 294 | cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, |
15c9ac0c SB |
295 | u8 phyid, struct cflayer *adapt_layer) |
296 | { | |
297 | struct cfcnfg *cnfg = container_obj(layer); | |
298 | struct cflayer *servicel = NULL; | |
299 | struct cfcnfg_phyinfo *phyinfo; | |
300 | if (adapt_layer == NULL) { | |
8d545c8f SB |
301 | pr_debug("CAIF: %s(): link setup response " |
302 | "but no client exist, send linkdown back\n", | |
303 | __func__); | |
304 | cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL); | |
15c9ac0c SB |
305 | return; |
306 | } | |
307 | ||
308 | caif_assert(cnfg != NULL); | |
309 | caif_assert(phyid != 0); | |
310 | phyinfo = &cnfg->phy_layers[phyid]; | |
15c9ac0c SB |
311 | caif_assert(phyinfo->id == phyid); |
312 | caif_assert(phyinfo->phy_layer != NULL); | |
313 | caif_assert(phyinfo->phy_layer->id == phyid); | |
314 | ||
9bfca3c6 DC |
315 | phyinfo->phy_ref_count++; |
316 | if (phyinfo->phy_ref_count == 1 && | |
15c9ac0c | 317 | phyinfo->phy_layer->modemcmd != NULL) { |
15c9ac0c SB |
318 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, |
319 | _CAIF_MODEMCMD_PHYIF_USEFULL); | |
15c9ac0c | 320 | } |
e539d83c | 321 | adapt_layer->id = channel_id; |
15c9ac0c SB |
322 | |
323 | switch (serv) { | |
324 | case CFCTRL_SRV_VEI: | |
e539d83c | 325 | servicel = cfvei_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
326 | break; |
327 | case CFCTRL_SRV_DATAGRAM: | |
e539d83c | 328 | servicel = cfdgml_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
329 | break; |
330 | case CFCTRL_SRV_RFM: | |
e539d83c | 331 | servicel = cfrfml_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
332 | break; |
333 | case CFCTRL_SRV_UTIL: | |
e539d83c | 334 | servicel = cfutill_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
335 | break; |
336 | case CFCTRL_SRV_VIDEO: | |
e539d83c | 337 | servicel = cfvidl_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
338 | break; |
339 | case CFCTRL_SRV_DBG: | |
e539d83c | 340 | servicel = cfdbgl_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
341 | break; |
342 | default: | |
343 | pr_err("CAIF: %s(): Protocol error. " | |
344 | "Link setup response - unknown channel type\n", | |
345 | __func__); | |
346 | return; | |
347 | } | |
348 | if (!servicel) { | |
349 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
350 | return; | |
351 | } | |
352 | layer_set_dn(servicel, cnfg->mux); | |
e539d83c | 353 | cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id); |
15c9ac0c SB |
354 | layer_set_up(servicel, adapt_layer); |
355 | layer_set_dn(adapt_layer, servicel); | |
8d545c8f | 356 | cfsrvl_get(servicel); |
15c9ac0c SB |
357 | servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0); |
358 | } | |
359 | ||
360 | void | |
361 | cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type, | |
362 | void *dev, struct cflayer *phy_layer, u16 *phyid, | |
363 | enum cfcnfg_phy_preference pref, | |
364 | bool fcs, bool stx) | |
365 | { | |
366 | struct cflayer *frml; | |
367 | struct cflayer *phy_driver = NULL; | |
368 | int i; | |
369 | ||
370 | ||
371 | if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) { | |
372 | *phyid = cnfg->last_phyid; | |
373 | ||
374 | /* range: * 1..(MAX_PHY_LAYERS-1) */ | |
375 | cnfg->last_phyid = | |
376 | (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1; | |
377 | } else { | |
378 | *phyid = 0; | |
379 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
380 | if (cnfg->phy_layers[i].frm_layer == NULL) { | |
381 | *phyid = i; | |
382 | break; | |
383 | } | |
384 | } | |
385 | } | |
386 | if (*phyid == 0) { | |
387 | pr_err("CAIF: %s(): No Available PHY ID\n", __func__); | |
388 | return; | |
389 | } | |
390 | ||
391 | switch (phy_type) { | |
392 | case CFPHYTYPE_FRAG: | |
393 | phy_driver = | |
394 | cfserl_create(CFPHYTYPE_FRAG, *phyid, stx); | |
395 | if (!phy_driver) { | |
396 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
397 | return; | |
398 | } | |
399 | ||
400 | break; | |
401 | case CFPHYTYPE_CAIF: | |
402 | phy_driver = NULL; | |
403 | break; | |
404 | default: | |
405 | pr_err("CAIF: %s(): %d", __func__, phy_type); | |
406 | return; | |
407 | break; | |
408 | } | |
409 | ||
410 | phy_layer->id = *phyid; | |
411 | cnfg->phy_layers[*phyid].pref = pref; | |
412 | cnfg->phy_layers[*phyid].id = *phyid; | |
413 | cnfg->phy_layers[*phyid].dev_info.id = *phyid; | |
414 | cnfg->phy_layers[*phyid].dev_info.dev = dev; | |
415 | cnfg->phy_layers[*phyid].phy_layer = phy_layer; | |
416 | cnfg->phy_layers[*phyid].phy_ref_count = 0; | |
417 | phy_layer->type = phy_type; | |
418 | frml = cffrml_create(*phyid, fcs); | |
419 | if (!frml) { | |
420 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
421 | return; | |
422 | } | |
423 | cnfg->phy_layers[*phyid].frm_layer = frml; | |
424 | cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid); | |
425 | layer_set_up(frml, cnfg->mux); | |
426 | ||
427 | if (phy_driver != NULL) { | |
428 | phy_driver->id = *phyid; | |
429 | layer_set_dn(frml, phy_driver); | |
430 | layer_set_up(phy_driver, frml); | |
431 | layer_set_dn(phy_driver, phy_layer); | |
432 | layer_set_up(phy_layer, phy_driver); | |
433 | } else { | |
434 | layer_set_dn(frml, phy_layer); | |
435 | layer_set_up(phy_layer, frml); | |
436 | } | |
437 | } | |
438 | EXPORT_SYMBOL(cfcnfg_add_phy_layer); | |
439 | ||
440 | int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer) | |
441 | { | |
442 | struct cflayer *frml, *frml_dn; | |
443 | u16 phyid; | |
444 | phyid = phy_layer->id; | |
445 | caif_assert(phyid == cnfg->phy_layers[phyid].id); | |
446 | caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer); | |
447 | caif_assert(phy_layer->id == phyid); | |
448 | caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid); | |
449 | ||
450 | memset(&cnfg->phy_layers[phy_layer->id], 0, | |
451 | sizeof(struct cfcnfg_phyinfo)); | |
452 | frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id); | |
453 | frml_dn = frml->dn; | |
454 | cffrml_set_uplayer(frml, NULL); | |
455 | cffrml_set_dnlayer(frml, NULL); | |
456 | kfree(frml); | |
457 | ||
458 | if (phy_layer != frml_dn) { | |
459 | layer_set_up(frml_dn, NULL); | |
460 | layer_set_dn(frml_dn, NULL); | |
461 | kfree(frml_dn); | |
462 | } | |
463 | layer_set_up(phy_layer, NULL); | |
464 | return 0; | |
465 | } | |
466 | EXPORT_SYMBOL(cfcnfg_del_phy_layer); |