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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> | |
8 | #include <net/caif/caif_layer.h> | |
9 | #include <net/caif/cfpkt.h> | |
10 | #include <net/caif/cfcnfg.h> | |
11 | #include <net/caif/cfctrl.h> | |
12 | #include <net/caif/cfmuxl.h> | |
13 | #include <net/caif/cffrml.h> | |
14 | #include <net/caif/cfserl.h> | |
15 | #include <net/caif/cfsrvl.h> | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <asm/atomic.h> | |
19 | ||
20 | #define MAX_PHY_LAYERS 7 | |
21 | #define PHY_NAME_LEN 20 | |
22 | ||
23 | #define container_obj(layr) container_of(layr, struct cfcnfg, layer) | |
24 | ||
25 | /* Information about CAIF physical interfaces held by Config Module in order | |
26 | * to manage physical interfaces | |
27 | */ | |
28 | struct cfcnfg_phyinfo { | |
29 | /* Pointer to the layer below the MUX (framing layer) */ | |
30 | struct cflayer *frm_layer; | |
31 | /* Pointer to the lowest actual physical layer */ | |
32 | struct cflayer *phy_layer; | |
33 | /* Unique identifier of the physical interface */ | |
34 | unsigned int id; | |
35 | /* Preference of the physical in interface */ | |
36 | enum cfcnfg_phy_preference pref; | |
37 | ||
38 | /* Reference count, number of channels using the device */ | |
39 | int phy_ref_count; | |
40 | ||
41 | /* Information about the physical device */ | |
42 | struct dev_info dev_info; | |
43 | }; | |
44 | ||
45 | struct cfcnfg { | |
46 | struct cflayer layer; | |
47 | struct cflayer *ctrl; | |
48 | struct cflayer *mux; | |
49 | u8 last_phyid; | |
50 | struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS]; | |
51 | }; | |
52 | ||
53 | static void cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, | |
54 | enum cfctrl_srv serv, u8 phyid, | |
55 | struct cflayer *adapt_layer); | |
56 | static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid, | |
57 | struct cflayer *client_layer); | |
58 | static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid, | |
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 */ | |
68 | this = kmalloc(sizeof(struct cfcnfg), GFP_ATOMIC); | |
69 | if (!this) { | |
70 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
71 | return NULL; | |
72 | } | |
73 | memset(this, 0, sizeof(struct cfcnfg)); | |
74 | this->mux = cfmuxl_create(); | |
75 | if (!this->mux) | |
76 | goto out_of_mem; | |
77 | this->ctrl = cfctrl_create(); | |
78 | if (!this->ctrl) | |
79 | goto out_of_mem; | |
80 | /* Initiate response functions */ | |
81 | resp = cfctrl_get_respfuncs(this->ctrl); | |
82 | resp->enum_rsp = cfctrl_enum_resp; | |
83 | resp->linkerror_ind = cfctrl_resp_func; | |
84 | resp->linkdestroy_rsp = cncfg_linkdestroy_rsp; | |
85 | resp->sleep_rsp = cfctrl_resp_func; | |
86 | resp->wake_rsp = cfctrl_resp_func; | |
87 | resp->restart_rsp = cfctrl_resp_func; | |
88 | resp->radioset_rsp = cfctrl_resp_func; | |
89 | resp->linksetup_rsp = cncfg_linkup_rsp; | |
90 | resp->reject_rsp = cncfg_reject_rsp; | |
91 | ||
92 | this->last_phyid = 1; | |
93 | ||
94 | cfmuxl_set_uplayer(this->mux, this->ctrl, 0); | |
95 | layer_set_dn(this->ctrl, this->mux); | |
96 | layer_set_up(this->ctrl, this); | |
97 | return this; | |
98 | out_of_mem: | |
99 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
100 | kfree(this->mux); | |
101 | kfree(this->ctrl); | |
102 | kfree(this); | |
103 | return NULL; | |
104 | } | |
105 | EXPORT_SYMBOL(cfcnfg_create); | |
106 | ||
107 | void cfcnfg_remove(struct cfcnfg *cfg) | |
108 | { | |
109 | if (cfg) { | |
110 | kfree(cfg->mux); | |
111 | kfree(cfg->ctrl); | |
112 | kfree(cfg); | |
113 | } | |
114 | } | |
115 | ||
116 | static void cfctrl_resp_func(void) | |
117 | { | |
118 | } | |
119 | ||
120 | static void cfctrl_enum_resp(void) | |
121 | { | |
122 | } | |
123 | ||
124 | struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg, | |
125 | enum cfcnfg_phy_preference phy_pref) | |
126 | { | |
127 | u16 i; | |
128 | ||
129 | /* Try to match with specified preference */ | |
130 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
131 | if (cnfg->phy_layers[i].id == i && | |
132 | cnfg->phy_layers[i].pref == phy_pref && | |
133 | cnfg->phy_layers[i].frm_layer != NULL) { | |
134 | caif_assert(cnfg->phy_layers != NULL); | |
135 | caif_assert(cnfg->phy_layers[i].id == i); | |
136 | return &cnfg->phy_layers[i].dev_info; | |
137 | } | |
138 | } | |
139 | /* Otherwise just return something */ | |
140 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
141 | if (cnfg->phy_layers[i].id == i) { | |
142 | caif_assert(cnfg->phy_layers != NULL); | |
143 | caif_assert(cnfg->phy_layers[i].id == i); | |
144 | return &cnfg->phy_layers[i].dev_info; | |
145 | } | |
146 | } | |
147 | ||
148 | return NULL; | |
149 | } | |
150 | ||
151 | static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg, | |
152 | u8 phyid) | |
153 | { | |
154 | int i; | |
155 | /* Try to match with specified preference */ | |
156 | for (i = 0; i < MAX_PHY_LAYERS; i++) | |
157 | if (cnfg->phy_layers[i].frm_layer != NULL && | |
158 | cnfg->phy_layers[i].id == phyid) | |
159 | return &cnfg->phy_layers[i]; | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | int cfcnfg_get_named(struct cfcnfg *cnfg, char *name) | |
164 | { | |
165 | int i; | |
166 | ||
167 | /* Try to match with specified name */ | |
168 | for (i = 0; i < MAX_PHY_LAYERS; i++) { | |
169 | if (cnfg->phy_layers[i].frm_layer != NULL | |
170 | && strcmp(cnfg->phy_layers[i].phy_layer->name, | |
171 | name) == 0) | |
172 | return cnfg->phy_layers[i].frm_layer->id; | |
173 | } | |
174 | return 0; | |
175 | } | |
176 | ||
177 | /* | |
178 | * NOTE: What happens on destroy failure: | |
179 | * 1a) No response - Too early | |
180 | * This will not happen because enumerate has already | |
181 | * completed. | |
182 | * 1b) No response - FATAL | |
183 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
184 | * Modem error, response is really expected - this | |
185 | * case is not really handled. | |
186 | * 2) O/E-bit indicate error | |
187 | * Ignored - this link is destroyed anyway. | |
188 | * 3) Not able to match on request | |
189 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
190 | * 4) Link-Error - (no response) | |
191 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
192 | */ | |
193 | ||
194 | int cfcnfg_del_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer) | |
195 | { | |
196 | u8 channel_id = 0; | |
197 | int ret = 0; | |
198 | struct cfcnfg_phyinfo *phyinfo = NULL; | |
199 | u8 phyid = 0; | |
200 | ||
201 | caif_assert(adap_layer != NULL); | |
202 | channel_id = adap_layer->id; | |
203 | if (channel_id == 0) { | |
204 | pr_err("CAIF: %s():adap_layer->id is 0\n", __func__); | |
205 | ret = -ENOTCONN; | |
206 | goto end; | |
207 | } | |
208 | ||
209 | if (adap_layer->dn == NULL) { | |
210 | pr_err("CAIF: %s():adap_layer->dn is NULL\n", __func__); | |
211 | ret = -ENODEV; | |
212 | goto end; | |
213 | } | |
214 | ||
215 | if (adap_layer->dn != NULL) | |
216 | phyid = cfsrvl_getphyid(adap_layer->dn); | |
217 | ||
218 | phyinfo = cfcnfg_get_phyinfo(cnfg, phyid); | |
219 | if (phyinfo == NULL) { | |
220 | pr_warning("CAIF: %s(): No interface to send disconnect to\n", | |
221 | __func__); | |
222 | ret = -ENODEV; | |
223 | goto end; | |
224 | } | |
225 | ||
226 | if (phyinfo->id != phyid | |
227 | || phyinfo->phy_layer->id != phyid | |
228 | || phyinfo->frm_layer->id != phyid) { | |
229 | ||
230 | pr_err("CAIF: %s(): Inconsistency in phy registration\n", | |
231 | __func__); | |
232 | ret = -EINVAL; | |
233 | goto end; | |
234 | } | |
235 | ||
236 | ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer); | |
237 | ||
238 | end: | |
239 | if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 && | |
240 | phyinfo->phy_layer != NULL && | |
241 | phyinfo->phy_layer->modemcmd != NULL) { | |
242 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, | |
243 | _CAIF_MODEMCMD_PHYIF_USELESS); | |
244 | } | |
245 | return ret; | |
246 | ||
247 | } | |
248 | EXPORT_SYMBOL(cfcnfg_del_adapt_layer); | |
249 | ||
250 | static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid, | |
251 | struct cflayer *client_layer) | |
252 | { | |
253 | struct cfcnfg *cnfg = container_obj(layer); | |
254 | struct cflayer *servl; | |
255 | ||
256 | /* | |
257 | * 1) Remove service from the MUX layer. The MUX must | |
258 | * guarante that no more payload sent "upwards" (receive) | |
259 | */ | |
260 | servl = cfmuxl_remove_uplayer(cnfg->mux, linkid); | |
261 | ||
262 | if (servl == NULL) { | |
263 | pr_err("CAIF: %s(): PROTOCOL ERROR " | |
264 | "- Error removing service_layer Linkid(%d)", | |
265 | __func__, linkid); | |
266 | return; | |
267 | } | |
268 | caif_assert(linkid == servl->id); | |
269 | ||
270 | if (servl != client_layer && servl->up != client_layer) { | |
271 | pr_err("CAIF: %s(): Error removing service_layer " | |
272 | "Linkid(%d) %p %p", | |
273 | __func__, linkid, (void *) servl, | |
274 | (void *) client_layer); | |
275 | return; | |
276 | } | |
277 | ||
278 | /* | |
279 | * 2) DEINIT_RSP must guarantee that no more packets are transmitted | |
280 | * from client (adap_layer) when it returns. | |
281 | */ | |
282 | ||
283 | if (servl->ctrlcmd == NULL) { | |
284 | pr_err("CAIF: %s(): Error servl->ctrlcmd == NULL", __func__); | |
285 | return; | |
286 | } | |
287 | ||
288 | servl->ctrlcmd(servl, CAIF_CTRLCMD_DEINIT_RSP, 0); | |
289 | ||
290 | /* 3) It is now safe to destroy the service layer. */ | |
291 | cfservl_destroy(servl); | |
292 | } | |
293 | ||
294 | /* | |
295 | * NOTE: What happens on linksetup failure: | |
296 | * 1a) No response - Too early | |
297 | * This will not happen because enumerate is secured | |
298 | * before using interface. | |
299 | * 1b) No response - FATAL | |
300 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
301 | * Modem error, response is really expected - this case is | |
302 | * not really handled. | |
303 | * 2) O/E-bit indicate error | |
304 | * Handled in cnfg_reject_rsp | |
305 | * 3) Not able to match on request | |
306 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
307 | * 4) Link-Error - (no response) | |
308 | * Not handled, but this should be a CAIF PROTOCOL ERROR | |
309 | */ | |
310 | ||
311 | int | |
312 | cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, | |
313 | struct cfctrl_link_param *param, | |
314 | struct cflayer *adap_layer) | |
315 | { | |
316 | struct cflayer *frml; | |
317 | if (adap_layer == NULL) { | |
318 | pr_err("CAIF: %s(): adap_layer is zero", __func__); | |
319 | return -EINVAL; | |
320 | } | |
321 | if (adap_layer->receive == NULL) { | |
322 | pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__); | |
323 | return -EINVAL; | |
324 | } | |
325 | if (adap_layer->ctrlcmd == NULL) { | |
326 | pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__); | |
327 | return -EINVAL; | |
328 | } | |
329 | frml = cnfg->phy_layers[param->phyid].frm_layer; | |
330 | if (frml == NULL) { | |
331 | pr_err("CAIF: %s(): Specified PHY type does not exist!", | |
332 | __func__); | |
333 | return -ENODEV; | |
334 | } | |
335 | caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id); | |
336 | caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id == | |
337 | param->phyid); | |
338 | caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id == | |
339 | param->phyid); | |
340 | /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ | |
341 | cfctrl_enum_req(cnfg->ctrl, param->phyid); | |
342 | cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); | |
343 | return 0; | |
344 | } | |
345 | EXPORT_SYMBOL(cfcnfg_add_adaptation_layer); | |
346 | ||
347 | static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid, | |
348 | struct cflayer *adapt_layer) | |
349 | { | |
350 | if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL) | |
351 | adapt_layer->ctrlcmd(adapt_layer, | |
352 | CAIF_CTRLCMD_INIT_FAIL_RSP, 0); | |
353 | } | |
354 | ||
355 | static void | |
356 | cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, enum cfctrl_srv serv, | |
357 | u8 phyid, struct cflayer *adapt_layer) | |
358 | { | |
359 | struct cfcnfg *cnfg = container_obj(layer); | |
360 | struct cflayer *servicel = NULL; | |
361 | struct cfcnfg_phyinfo *phyinfo; | |
362 | if (adapt_layer == NULL) { | |
363 | pr_err("CAIF: %s(): PROTOCOL ERROR " | |
364 | "- LinkUp Request/Response did not match\n", __func__); | |
365 | return; | |
366 | } | |
367 | ||
368 | caif_assert(cnfg != NULL); | |
369 | caif_assert(phyid != 0); | |
370 | phyinfo = &cnfg->phy_layers[phyid]; | |
371 | caif_assert(phyinfo != NULL); | |
372 | caif_assert(phyinfo->id == phyid); | |
373 | caif_assert(phyinfo->phy_layer != NULL); | |
374 | caif_assert(phyinfo->phy_layer->id == phyid); | |
375 | ||
376 | if (phyinfo != NULL && | |
377 | phyinfo->phy_ref_count++ == 0 && | |
378 | phyinfo->phy_layer != NULL && | |
379 | phyinfo->phy_layer->modemcmd != NULL) { | |
380 | caif_assert(phyinfo->phy_layer->id == phyid); | |
381 | phyinfo->phy_layer->modemcmd(phyinfo->phy_layer, | |
382 | _CAIF_MODEMCMD_PHYIF_USEFULL); | |
383 | ||
384 | } | |
385 | adapt_layer->id = linkid; | |
386 | ||
387 | switch (serv) { | |
388 | case CFCTRL_SRV_VEI: | |
389 | servicel = cfvei_create(linkid, &phyinfo->dev_info); | |
390 | break; | |
391 | case CFCTRL_SRV_DATAGRAM: | |
392 | servicel = cfdgml_create(linkid, &phyinfo->dev_info); | |
393 | break; | |
394 | case CFCTRL_SRV_RFM: | |
395 | servicel = cfrfml_create(linkid, &phyinfo->dev_info); | |
396 | break; | |
397 | case CFCTRL_SRV_UTIL: | |
398 | servicel = cfutill_create(linkid, &phyinfo->dev_info); | |
399 | break; | |
400 | case CFCTRL_SRV_VIDEO: | |
401 | servicel = cfvidl_create(linkid, &phyinfo->dev_info); | |
402 | break; | |
403 | case CFCTRL_SRV_DBG: | |
404 | servicel = cfdbgl_create(linkid, &phyinfo->dev_info); | |
405 | break; | |
406 | default: | |
407 | pr_err("CAIF: %s(): Protocol error. " | |
408 | "Link setup response - unknown channel type\n", | |
409 | __func__); | |
410 | return; | |
411 | } | |
412 | if (!servicel) { | |
413 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
414 | return; | |
415 | } | |
416 | layer_set_dn(servicel, cnfg->mux); | |
417 | cfmuxl_set_uplayer(cnfg->mux, servicel, linkid); | |
418 | layer_set_up(servicel, adapt_layer); | |
419 | layer_set_dn(adapt_layer, servicel); | |
420 | servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0); | |
421 | } | |
422 | ||
423 | void | |
424 | cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type, | |
425 | void *dev, struct cflayer *phy_layer, u16 *phyid, | |
426 | enum cfcnfg_phy_preference pref, | |
427 | bool fcs, bool stx) | |
428 | { | |
429 | struct cflayer *frml; | |
430 | struct cflayer *phy_driver = NULL; | |
431 | int i; | |
432 | ||
433 | ||
434 | if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) { | |
435 | *phyid = cnfg->last_phyid; | |
436 | ||
437 | /* range: * 1..(MAX_PHY_LAYERS-1) */ | |
438 | cnfg->last_phyid = | |
439 | (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1; | |
440 | } else { | |
441 | *phyid = 0; | |
442 | for (i = 1; i < MAX_PHY_LAYERS; i++) { | |
443 | if (cnfg->phy_layers[i].frm_layer == NULL) { | |
444 | *phyid = i; | |
445 | break; | |
446 | } | |
447 | } | |
448 | } | |
449 | if (*phyid == 0) { | |
450 | pr_err("CAIF: %s(): No Available PHY ID\n", __func__); | |
451 | return; | |
452 | } | |
453 | ||
454 | switch (phy_type) { | |
455 | case CFPHYTYPE_FRAG: | |
456 | phy_driver = | |
457 | cfserl_create(CFPHYTYPE_FRAG, *phyid, stx); | |
458 | if (!phy_driver) { | |
459 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
460 | return; | |
461 | } | |
462 | ||
463 | break; | |
464 | case CFPHYTYPE_CAIF: | |
465 | phy_driver = NULL; | |
466 | break; | |
467 | default: | |
468 | pr_err("CAIF: %s(): %d", __func__, phy_type); | |
469 | return; | |
470 | break; | |
471 | } | |
472 | ||
473 | phy_layer->id = *phyid; | |
474 | cnfg->phy_layers[*phyid].pref = pref; | |
475 | cnfg->phy_layers[*phyid].id = *phyid; | |
476 | cnfg->phy_layers[*phyid].dev_info.id = *phyid; | |
477 | cnfg->phy_layers[*phyid].dev_info.dev = dev; | |
478 | cnfg->phy_layers[*phyid].phy_layer = phy_layer; | |
479 | cnfg->phy_layers[*phyid].phy_ref_count = 0; | |
480 | phy_layer->type = phy_type; | |
481 | frml = cffrml_create(*phyid, fcs); | |
482 | if (!frml) { | |
483 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
484 | return; | |
485 | } | |
486 | cnfg->phy_layers[*phyid].frm_layer = frml; | |
487 | cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid); | |
488 | layer_set_up(frml, cnfg->mux); | |
489 | ||
490 | if (phy_driver != NULL) { | |
491 | phy_driver->id = *phyid; | |
492 | layer_set_dn(frml, phy_driver); | |
493 | layer_set_up(phy_driver, frml); | |
494 | layer_set_dn(phy_driver, phy_layer); | |
495 | layer_set_up(phy_layer, phy_driver); | |
496 | } else { | |
497 | layer_set_dn(frml, phy_layer); | |
498 | layer_set_up(phy_layer, frml); | |
499 | } | |
500 | } | |
501 | EXPORT_SYMBOL(cfcnfg_add_phy_layer); | |
502 | ||
503 | int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer) | |
504 | { | |
505 | struct cflayer *frml, *frml_dn; | |
506 | u16 phyid; | |
507 | phyid = phy_layer->id; | |
508 | caif_assert(phyid == cnfg->phy_layers[phyid].id); | |
509 | caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer); | |
510 | caif_assert(phy_layer->id == phyid); | |
511 | caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid); | |
512 | ||
513 | memset(&cnfg->phy_layers[phy_layer->id], 0, | |
514 | sizeof(struct cfcnfg_phyinfo)); | |
515 | frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id); | |
516 | frml_dn = frml->dn; | |
517 | cffrml_set_uplayer(frml, NULL); | |
518 | cffrml_set_dnlayer(frml, NULL); | |
519 | kfree(frml); | |
520 | ||
521 | if (phy_layer != frml_dn) { | |
522 | layer_set_up(frml_dn, NULL); | |
523 | layer_set_dn(frml_dn, NULL); | |
524 | kfree(frml_dn); | |
525 | } | |
526 | layer_set_up(phy_layer, NULL); | |
527 | return 0; | |
528 | } | |
529 | EXPORT_SYMBOL(cfcnfg_del_phy_layer); |