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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 | ||
54 | static void cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, | |
55 | enum cfctrl_srv serv, u8 phyid, | |
56 | struct cflayer *adapt_layer); | |
57 | static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid, | |
58 | struct cflayer *client_layer); | |
59 | static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid, | |
60 | struct cflayer *adapt_layer); | |
61 | static void cfctrl_resp_func(void); | |
62 | static void cfctrl_enum_resp(void); | |
63 | ||
64 | struct cfcnfg *cfcnfg_create(void) | |
65 | { | |
66 | struct cfcnfg *this; | |
67 | struct cfctrl_rsp *resp; | |
68 | /* Initiate this layer */ | |
69 | this = kmalloc(sizeof(struct cfcnfg), GFP_ATOMIC); | |
70 | if (!this) { | |
71 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
72 | return NULL; | |
73 | } | |
74 | memset(this, 0, sizeof(struct cfcnfg)); | |
75 | this->mux = cfmuxl_create(); | |
76 | if (!this->mux) | |
77 | goto out_of_mem; | |
78 | this->ctrl = cfctrl_create(); | |
79 | if (!this->ctrl) | |
80 | goto out_of_mem; | |
81 | /* Initiate response functions */ | |
82 | resp = cfctrl_get_respfuncs(this->ctrl); | |
83 | resp->enum_rsp = cfctrl_enum_resp; | |
84 | resp->linkerror_ind = cfctrl_resp_func; | |
85 | resp->linkdestroy_rsp = cncfg_linkdestroy_rsp; | |
86 | resp->sleep_rsp = cfctrl_resp_func; | |
87 | resp->wake_rsp = cfctrl_resp_func; | |
88 | resp->restart_rsp = cfctrl_resp_func; | |
89 | resp->radioset_rsp = cfctrl_resp_func; | |
90 | resp->linksetup_rsp = cncfg_linkup_rsp; | |
91 | resp->reject_rsp = cncfg_reject_rsp; | |
92 | ||
93 | this->last_phyid = 1; | |
94 | ||
95 | cfmuxl_set_uplayer(this->mux, this->ctrl, 0); | |
96 | layer_set_dn(this->ctrl, this->mux); | |
97 | layer_set_up(this->ctrl, this); | |
98 | return this; | |
99 | out_of_mem: | |
100 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
101 | kfree(this->mux); | |
102 | kfree(this->ctrl); | |
103 | kfree(this); | |
104 | return NULL; | |
105 | } | |
106 | EXPORT_SYMBOL(cfcnfg_create); | |
107 | ||
108 | void cfcnfg_remove(struct cfcnfg *cfg) | |
109 | { | |
110 | if (cfg) { | |
111 | kfree(cfg->mux); | |
112 | kfree(cfg->ctrl); | |
113 | kfree(cfg); | |
114 | } | |
115 | } | |
116 | ||
117 | static void cfctrl_resp_func(void) | |
118 | { | |
119 | } | |
120 | ||
121 | static void cfctrl_enum_resp(void) | |
122 | { | |
123 | } | |
124 | ||
125 | struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg, | |
126 | enum cfcnfg_phy_preference phy_pref) | |
127 | { | |
128 | u16 i; | |
129 | ||
130 | /* Try to match with specified preference */ | |
131 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
132 | if (cnfg->phy_layers[i].id == i && | |
133 | cnfg->phy_layers[i].pref == phy_pref && | |
134 | cnfg->phy_layers[i].frm_layer != NULL) { | |
135 | caif_assert(cnfg->phy_layers != NULL); | |
136 | caif_assert(cnfg->phy_layers[i].id == i); | |
137 | return &cnfg->phy_layers[i].dev_info; | |
138 | } | |
139 | } | |
140 | /* Otherwise just return something */ | |
141 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
142 | if (cnfg->phy_layers[i].id == i) { | |
143 | caif_assert(cnfg->phy_layers != NULL); | |
144 | caif_assert(cnfg->phy_layers[i].id == i); | |
145 | return &cnfg->phy_layers[i].dev_info; | |
146 | } | |
147 | } | |
148 | ||
149 | return NULL; | |
150 | } | |
151 | ||
152 | static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg, | |
153 | u8 phyid) | |
154 | { | |
155 | int i; | |
156 | /* Try to match with specified preference */ | |
157 | for (i = 0; i < MAX_PHY_LAYERS; i++) | |
158 | if (cnfg->phy_layers[i].frm_layer != NULL && | |
159 | cnfg->phy_layers[i].id == phyid) | |
160 | return &cnfg->phy_layers[i]; | |
161 | return NULL; | |
162 | } | |
163 | ||
164 | int cfcnfg_get_named(struct cfcnfg *cnfg, char *name) | |
165 | { | |
166 | int i; | |
167 | ||
168 | /* Try to match with specified name */ | |
169 | for (i = 0; i < MAX_PHY_LAYERS; i++) { | |
170 | if (cnfg->phy_layers[i].frm_layer != NULL | |
171 | && strcmp(cnfg->phy_layers[i].phy_layer->name, | |
172 | name) == 0) | |
173 | return cnfg->phy_layers[i].frm_layer->id; | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
178 | /* | |
179 | * NOTE: What happens on destroy failure: | |
180 | * 1a) No response - Too early | |
181 | * This will not happen because enumerate has already | |
182 | * completed. | |
183 | * 1b) No response - FATAL | |
184 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
185 | * Modem error, response is really expected - this | |
186 | * case is not really handled. | |
187 | * 2) O/E-bit indicate error | |
188 | * Ignored - this link is destroyed anyway. | |
189 | * 3) Not able to match on request | |
190 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
191 | * 4) Link-Error - (no response) | |
192 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
193 | */ | |
194 | ||
195 | int cfcnfg_del_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer) | |
196 | { | |
197 | u8 channel_id = 0; | |
198 | int ret = 0; | |
199 | struct cfcnfg_phyinfo *phyinfo = NULL; | |
200 | u8 phyid = 0; | |
201 | ||
202 | caif_assert(adap_layer != NULL); | |
203 | channel_id = adap_layer->id; | |
204 | if (channel_id == 0) { | |
205 | pr_err("CAIF: %s():adap_layer->id is 0\n", __func__); | |
206 | ret = -ENOTCONN; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | if (adap_layer->dn == NULL) { | |
211 | pr_err("CAIF: %s():adap_layer->dn is NULL\n", __func__); | |
212 | ret = -ENODEV; | |
213 | goto end; | |
214 | } | |
215 | ||
216 | if (adap_layer->dn != NULL) | |
217 | phyid = cfsrvl_getphyid(adap_layer->dn); | |
218 | ||
219 | phyinfo = cfcnfg_get_phyinfo(cnfg, phyid); | |
220 | if (phyinfo == NULL) { | |
221 | pr_warning("CAIF: %s(): No interface to send disconnect to\n", | |
222 | __func__); | |
223 | ret = -ENODEV; | |
224 | goto end; | |
225 | } | |
226 | ||
227 | if (phyinfo->id != phyid | |
228 | || phyinfo->phy_layer->id != phyid | |
229 | || phyinfo->frm_layer->id != phyid) { | |
230 | ||
231 | pr_err("CAIF: %s(): Inconsistency in phy registration\n", | |
232 | __func__); | |
233 | ret = -EINVAL; | |
234 | goto end; | |
235 | } | |
236 | ||
237 | ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer); | |
238 | ||
239 | end: | |
240 | if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 && | |
241 | phyinfo->phy_layer != NULL && | |
242 | phyinfo->phy_layer->modemcmd != NULL) { | |
243 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, | |
244 | _CAIF_MODEMCMD_PHYIF_USELESS); | |
245 | } | |
246 | return ret; | |
247 | ||
248 | } | |
249 | EXPORT_SYMBOL(cfcnfg_del_adapt_layer); | |
250 | ||
251 | static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid, | |
252 | struct cflayer *client_layer) | |
253 | { | |
254 | struct cfcnfg *cnfg = container_obj(layer); | |
255 | struct cflayer *servl; | |
256 | ||
257 | /* | |
258 | * 1) Remove service from the MUX layer. The MUX must | |
259 | * guarante that no more payload sent "upwards" (receive) | |
260 | */ | |
261 | servl = cfmuxl_remove_uplayer(cnfg->mux, linkid); | |
262 | ||
263 | if (servl == NULL) { | |
264 | pr_err("CAIF: %s(): PROTOCOL ERROR " | |
265 | "- Error removing service_layer Linkid(%d)", | |
266 | __func__, linkid); | |
267 | return; | |
268 | } | |
269 | caif_assert(linkid == servl->id); | |
270 | ||
271 | if (servl != client_layer && servl->up != client_layer) { | |
272 | pr_err("CAIF: %s(): Error removing service_layer " | |
273 | "Linkid(%d) %p %p", | |
274 | __func__, linkid, (void *) servl, | |
275 | (void *) client_layer); | |
276 | return; | |
277 | } | |
278 | ||
279 | /* | |
280 | * 2) DEINIT_RSP must guarantee that no more packets are transmitted | |
281 | * from client (adap_layer) when it returns. | |
282 | */ | |
283 | ||
284 | if (servl->ctrlcmd == NULL) { | |
285 | pr_err("CAIF: %s(): Error servl->ctrlcmd == NULL", __func__); | |
286 | return; | |
287 | } | |
288 | ||
289 | servl->ctrlcmd(servl, CAIF_CTRLCMD_DEINIT_RSP, 0); | |
290 | ||
291 | /* 3) It is now safe to destroy the service layer. */ | |
292 | cfservl_destroy(servl); | |
293 | } | |
294 | ||
295 | /* | |
296 | * NOTE: What happens on linksetup failure: | |
297 | * 1a) No response - Too early | |
298 | * This will not happen because enumerate is secured | |
299 | * before using interface. | |
300 | * 1b) No response - FATAL | |
301 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
302 | * Modem error, response is really expected - this case is | |
303 | * not really handled. | |
304 | * 2) O/E-bit indicate error | |
305 | * Handled in cnfg_reject_rsp | |
306 | * 3) Not able to match on request | |
307 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
308 | * 4) Link-Error - (no response) | |
309 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
310 | */ | |
311 | ||
312 | int | |
313 | cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, | |
314 | struct cfctrl_link_param *param, | |
315 | struct cflayer *adap_layer) | |
316 | { | |
317 | struct cflayer *frml; | |
318 | if (adap_layer == NULL) { | |
319 | pr_err("CAIF: %s(): adap_layer is zero", __func__); | |
320 | return -EINVAL; | |
321 | } | |
322 | if (adap_layer->receive == NULL) { | |
323 | pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__); | |
324 | return -EINVAL; | |
325 | } | |
326 | if (adap_layer->ctrlcmd == NULL) { | |
327 | pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__); | |
328 | return -EINVAL; | |
329 | } | |
330 | frml = cnfg->phy_layers[param->phyid].frm_layer; | |
331 | if (frml == NULL) { | |
332 | pr_err("CAIF: %s(): Specified PHY type does not exist!", | |
333 | __func__); | |
334 | return -ENODEV; | |
335 | } | |
336 | caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id); | |
337 | caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id == | |
338 | param->phyid); | |
339 | caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id == | |
340 | param->phyid); | |
341 | /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ | |
342 | cfctrl_enum_req(cnfg->ctrl, param->phyid); | |
343 | cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); | |
344 | return 0; | |
345 | } | |
346 | EXPORT_SYMBOL(cfcnfg_add_adaptation_layer); | |
347 | ||
348 | static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid, | |
349 | struct cflayer *adapt_layer) | |
350 | { | |
351 | if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL) | |
352 | adapt_layer->ctrlcmd(adapt_layer, | |
353 | CAIF_CTRLCMD_INIT_FAIL_RSP, 0); | |
354 | } | |
355 | ||
356 | static void | |
357 | cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, enum cfctrl_srv serv, | |
358 | u8 phyid, struct cflayer *adapt_layer) | |
359 | { | |
360 | struct cfcnfg *cnfg = container_obj(layer); | |
361 | struct cflayer *servicel = NULL; | |
362 | struct cfcnfg_phyinfo *phyinfo; | |
363 | if (adapt_layer == NULL) { | |
364 | pr_err("CAIF: %s(): PROTOCOL ERROR " | |
365 | "- LinkUp Request/Response did not match\n", __func__); | |
366 | return; | |
367 | } | |
368 | ||
369 | caif_assert(cnfg != NULL); | |
370 | caif_assert(phyid != 0); | |
371 | phyinfo = &cnfg->phy_layers[phyid]; | |
372 | caif_assert(phyinfo != NULL); | |
373 | caif_assert(phyinfo->id == phyid); | |
374 | caif_assert(phyinfo->phy_layer != NULL); | |
375 | caif_assert(phyinfo->phy_layer->id == phyid); | |
376 | ||
377 | if (phyinfo != NULL && | |
378 | phyinfo->phy_ref_count++ == 0 && | |
379 | phyinfo->phy_layer != NULL && | |
380 | phyinfo->phy_layer->modemcmd != NULL) { | |
381 | caif_assert(phyinfo->phy_layer->id == phyid); | |
382 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, | |
383 | _CAIF_MODEMCMD_PHYIF_USEFULL); | |
384 | ||
385 | } | |
386 | adapt_layer->id = linkid; | |
387 | ||
388 | switch (serv) { | |
389 | case CFCTRL_SRV_VEI: | |
390 | servicel = cfvei_create(linkid, &phyinfo->dev_info); | |
391 | break; | |
392 | case CFCTRL_SRV_DATAGRAM: | |
393 | servicel = cfdgml_create(linkid, &phyinfo->dev_info); | |
394 | break; | |
395 | case CFCTRL_SRV_RFM: | |
396 | servicel = cfrfml_create(linkid, &phyinfo->dev_info); | |
397 | break; | |
398 | case CFCTRL_SRV_UTIL: | |
399 | servicel = cfutill_create(linkid, &phyinfo->dev_info); | |
400 | break; | |
401 | case CFCTRL_SRV_VIDEO: | |
402 | servicel = cfvidl_create(linkid, &phyinfo->dev_info); | |
403 | break; | |
404 | case CFCTRL_SRV_DBG: | |
405 | servicel = cfdbgl_create(linkid, &phyinfo->dev_info); | |
406 | break; | |
407 | default: | |
408 | pr_err("CAIF: %s(): Protocol error. " | |
409 | "Link setup response - unknown channel type\n", | |
410 | __func__); | |
411 | return; | |
412 | } | |
413 | if (!servicel) { | |
414 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
415 | return; | |
416 | } | |
417 | layer_set_dn(servicel, cnfg->mux); | |
418 | cfmuxl_set_uplayer(cnfg->mux, servicel, linkid); | |
419 | layer_set_up(servicel, adapt_layer); | |
420 | layer_set_dn(adapt_layer, servicel); | |
421 | servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0); | |
422 | } | |
423 | ||
424 | void | |
425 | cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type, | |
426 | void *dev, struct cflayer *phy_layer, u16 *phyid, | |
427 | enum cfcnfg_phy_preference pref, | |
428 | bool fcs, bool stx) | |
429 | { | |
430 | struct cflayer *frml; | |
431 | struct cflayer *phy_driver = NULL; | |
432 | int i; | |
433 | ||
434 | ||
435 | if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) { | |
436 | *phyid = cnfg->last_phyid; | |
437 | ||
438 | /* range: * 1..(MAX_PHY_LAYERS-1) */ | |
439 | cnfg->last_phyid = | |
440 | (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1; | |
441 | } else { | |
442 | *phyid = 0; | |
443 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
444 | if (cnfg->phy_layers[i].frm_layer == NULL) { | |
445 | *phyid = i; | |
446 | break; | |
447 | } | |
448 | } | |
449 | } | |
450 | if (*phyid == 0) { | |
451 | pr_err("CAIF: %s(): No Available PHY ID\n", __func__); | |
452 | return; | |
453 | } | |
454 | ||
455 | switch (phy_type) { | |
456 | case CFPHYTYPE_FRAG: | |
457 | phy_driver = | |
458 | cfserl_create(CFPHYTYPE_FRAG, *phyid, stx); | |
459 | if (!phy_driver) { | |
460 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
461 | return; | |
462 | } | |
463 | ||
464 | break; | |
465 | case CFPHYTYPE_CAIF: | |
466 | phy_driver = NULL; | |
467 | break; | |
468 | default: | |
469 | pr_err("CAIF: %s(): %d", __func__, phy_type); | |
470 | return; | |
471 | break; | |
472 | } | |
473 | ||
474 | phy_layer->id = *phyid; | |
475 | cnfg->phy_layers[*phyid].pref = pref; | |
476 | cnfg->phy_layers[*phyid].id = *phyid; | |
477 | cnfg->phy_layers[*phyid].dev_info.id = *phyid; | |
478 | cnfg->phy_layers[*phyid].dev_info.dev = dev; | |
479 | cnfg->phy_layers[*phyid].phy_layer = phy_layer; | |
480 | cnfg->phy_layers[*phyid].phy_ref_count = 0; | |
481 | phy_layer->type = phy_type; | |
482 | frml = cffrml_create(*phyid, fcs); | |
483 | if (!frml) { | |
484 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
485 | return; | |
486 | } | |
487 | cnfg->phy_layers[*phyid].frm_layer = frml; | |
488 | cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid); | |
489 | layer_set_up(frml, cnfg->mux); | |
490 | ||
491 | if (phy_driver != NULL) { | |
492 | phy_driver->id = *phyid; | |
493 | layer_set_dn(frml, phy_driver); | |
494 | layer_set_up(phy_driver, frml); | |
495 | layer_set_dn(phy_driver, phy_layer); | |
496 | layer_set_up(phy_layer, phy_driver); | |
497 | } else { | |
498 | layer_set_dn(frml, phy_layer); | |
499 | layer_set_up(phy_layer, frml); | |
500 | } | |
501 | } | |
502 | EXPORT_SYMBOL(cfcnfg_add_phy_layer); | |
503 | ||
504 | int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer) | |
505 | { | |
506 | struct cflayer *frml, *frml_dn; | |
507 | u16 phyid; | |
508 | phyid = phy_layer->id; | |
509 | caif_assert(phyid == cnfg->phy_layers[phyid].id); | |
510 | caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer); | |
511 | caif_assert(phy_layer->id == phyid); | |
512 | caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid); | |
513 | ||
514 | memset(&cnfg->phy_layers[phy_layer->id], 0, | |
515 | sizeof(struct cfcnfg_phyinfo)); | |
516 | frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id); | |
517 | frml_dn = frml->dn; | |
518 | cffrml_set_uplayer(frml, NULL); | |
519 | cffrml_set_dnlayer(frml, NULL); | |
520 | kfree(frml); | |
521 | ||
522 | if (phy_layer != frml_dn) { | |
523 | layer_set_up(frml_dn, NULL); | |
524 | layer_set_dn(frml_dn, NULL); | |
525 | kfree(frml_dn); | |
526 | } | |
527 | layer_set_up(phy_layer, NULL); | |
528 | return 0; | |
529 | } | |
530 | EXPORT_SYMBOL(cfcnfg_del_phy_layer); |