Commit | Line | Data |
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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 | */ | |
b31fa5ba JP |
6 | |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ | |
8 | ||
15c9ac0c SB |
9 | #include <linux/kernel.h> |
10 | #include <linux/stddef.h> | |
6c579906 | 11 | #include <linux/slab.h> |
2aa40aef | 12 | #include <linux/netdevice.h> |
f3621440 | 13 | #include <linux/module.h> |
15c9ac0c SB |
14 | #include <net/caif/caif_layer.h> |
15 | #include <net/caif/cfpkt.h> | |
16 | #include <net/caif/cfcnfg.h> | |
17 | #include <net/caif/cfctrl.h> | |
18 | #include <net/caif/cfmuxl.h> | |
19 | #include <net/caif/cffrml.h> | |
20 | #include <net/caif/cfserl.h> | |
21 | #include <net/caif/cfsrvl.h> | |
f3621440 | 22 | #include <net/caif/caif_dev.h> |
15c9ac0c SB |
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 { | |
f3621440 | 30 | struct list_head node; |
31 | bool up; | |
32 | ||
15c9ac0c SB |
33 | /* Pointer to the layer below the MUX (framing layer) */ |
34 | struct cflayer *frm_layer; | |
35 | /* Pointer to the lowest actual physical layer */ | |
36 | struct cflayer *phy_layer; | |
37 | /* Unique identifier of the physical interface */ | |
38 | unsigned int id; | |
39 | /* Preference of the physical in interface */ | |
40 | enum cfcnfg_phy_preference pref; | |
41 | ||
15c9ac0c SB |
42 | /* Information about the physical device */ |
43 | struct dev_info dev_info; | |
2aa40aef SB |
44 | |
45 | /* Interface index */ | |
46 | int ifindex; | |
47 | ||
48 | /* Use Start of frame extension */ | |
49 | bool use_stx; | |
50 | ||
51 | /* Use Start of frame checksum */ | |
52 | bool use_fcs; | |
15c9ac0c SB |
53 | }; |
54 | ||
55 | struct cfcnfg { | |
56 | struct cflayer layer; | |
57 | struct cflayer *ctrl; | |
58 | struct cflayer *mux; | |
f3621440 | 59 | struct list_head phys; |
60 | struct mutex lock; | |
15c9ac0c SB |
61 | }; |
62 | ||
e539d83c | 63 | static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
64 | enum cfctrl_srv serv, u8 phyid, |
65 | struct cflayer *adapt_layer); | |
8d545c8f | 66 | static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id); |
e539d83c | 67 | static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
68 | struct cflayer *adapt_layer); |
69 | static void cfctrl_resp_func(void); | |
70 | static void cfctrl_enum_resp(void); | |
71 | ||
72 | struct cfcnfg *cfcnfg_create(void) | |
73 | { | |
74 | struct cfcnfg *this; | |
75 | struct cfctrl_rsp *resp; | |
f3621440 | 76 | |
77 | might_sleep(); | |
78 | ||
15c9ac0c | 79 | /* Initiate this layer */ |
49afa55b | 80 | this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC); |
15c9ac0c | 81 | if (!this) { |
b31fa5ba | 82 | pr_warn("Out of memory\n"); |
15c9ac0c SB |
83 | return NULL; |
84 | } | |
15c9ac0c SB |
85 | this->mux = cfmuxl_create(); |
86 | if (!this->mux) | |
87 | goto out_of_mem; | |
88 | this->ctrl = cfctrl_create(); | |
89 | if (!this->ctrl) | |
90 | goto out_of_mem; | |
91 | /* Initiate response functions */ | |
92 | resp = cfctrl_get_respfuncs(this->ctrl); | |
93 | resp->enum_rsp = cfctrl_enum_resp; | |
94 | resp->linkerror_ind = cfctrl_resp_func; | |
e539d83c | 95 | resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp; |
15c9ac0c SB |
96 | resp->sleep_rsp = cfctrl_resp_func; |
97 | resp->wake_rsp = cfctrl_resp_func; | |
98 | resp->restart_rsp = cfctrl_resp_func; | |
99 | resp->radioset_rsp = cfctrl_resp_func; | |
e539d83c SB |
100 | resp->linksetup_rsp = cfcnfg_linkup_rsp; |
101 | resp->reject_rsp = cfcnfg_reject_rsp; | |
f3621440 | 102 | INIT_LIST_HEAD(&this->phys); |
15c9ac0c SB |
103 | |
104 | cfmuxl_set_uplayer(this->mux, this->ctrl, 0); | |
105 | layer_set_dn(this->ctrl, this->mux); | |
106 | layer_set_up(this->ctrl, this); | |
f3621440 | 107 | mutex_init(&this->lock); |
108 | ||
15c9ac0c SB |
109 | return this; |
110 | out_of_mem: | |
b31fa5ba | 111 | pr_warn("Out of memory\n"); |
f3621440 | 112 | |
113 | synchronize_rcu(); | |
114 | ||
15c9ac0c SB |
115 | kfree(this->mux); |
116 | kfree(this->ctrl); | |
117 | kfree(this); | |
118 | return NULL; | |
119 | } | |
15c9ac0c SB |
120 | |
121 | void cfcnfg_remove(struct cfcnfg *cfg) | |
122 | { | |
f3621440 | 123 | might_sleep(); |
15c9ac0c | 124 | if (cfg) { |
f3621440 | 125 | synchronize_rcu(); |
126 | ||
15c9ac0c | 127 | kfree(cfg->mux); |
c85c2951 | 128 | cfctrl_remove(cfg->ctrl); |
15c9ac0c SB |
129 | kfree(cfg); |
130 | } | |
131 | } | |
132 | ||
133 | static void cfctrl_resp_func(void) | |
134 | { | |
135 | } | |
136 | ||
f3621440 | 137 | static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo_rcu(struct cfcnfg *cnfg, |
138 | u8 phyid) | |
139 | { | |
140 | struct cfcnfg_phyinfo *phy; | |
141 | ||
142 | list_for_each_entry_rcu(phy, &cnfg->phys, node) | |
143 | if (phy->id == phyid) | |
144 | return phy; | |
145 | return NULL; | |
146 | } | |
147 | ||
15c9ac0c SB |
148 | static void cfctrl_enum_resp(void) |
149 | { | |
150 | } | |
151 | ||
bee925db | 152 | static struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg, |
15c9ac0c SB |
153 | enum cfcnfg_phy_preference phy_pref) |
154 | { | |
15c9ac0c | 155 | /* Try to match with specified preference */ |
f3621440 | 156 | struct cfcnfg_phyinfo *phy; |
157 | ||
158 | list_for_each_entry_rcu(phy, &cnfg->phys, node) { | |
159 | if (phy->up && phy->pref == phy_pref && | |
160 | phy->frm_layer != NULL) | |
161 | ||
162 | return &phy->dev_info; | |
15c9ac0c SB |
163 | } |
164 | ||
f3621440 | 165 | /* Otherwise just return something */ |
166 | list_for_each_entry_rcu(phy, &cnfg->phys, node) | |
167 | if (phy->up) | |
168 | return &phy->dev_info; | |
15c9ac0c | 169 | |
15c9ac0c SB |
170 | return NULL; |
171 | } | |
172 | ||
bee925db | 173 | static int cfcnfg_get_id_from_ifi(struct cfcnfg *cnfg, int ifi) |
15c9ac0c | 174 | { |
f3621440 | 175 | struct cfcnfg_phyinfo *phy; |
176 | ||
177 | list_for_each_entry_rcu(phy, &cnfg->phys, node) | |
178 | if (phy->ifindex == ifi && phy->up) | |
179 | return phy->id; | |
f2527ec4 | 180 | return -ENODEV; |
15c9ac0c SB |
181 | } |
182 | ||
bee925db | 183 | int caif_disconnect_client(struct net *net, struct cflayer *adap_layer) |
15c9ac0c | 184 | { |
54e90fb5 | 185 | u8 channel_id; |
bee925db | 186 | struct cfcnfg *cfg = get_cfcnfg(net); |
01a85901 | 187 | |
15c9ac0c | 188 | caif_assert(adap_layer != NULL); |
f3621440 | 189 | cfctrl_cancel_req(cfg->ctrl, adap_layer); |
54e90fb5 | 190 | channel_id = adap_layer->id; |
191 | if (channel_id != 0) { | |
192 | struct cflayer *servl; | |
193 | servl = cfmuxl_remove_uplayer(cfg->mux, channel_id); | |
194 | if (servl != NULL) | |
195 | layer_set_up(servl, NULL); | |
196 | } else | |
197 | pr_debug("nothing to disconnect\n"); | |
198 | cfctrl_linkdown_req(cfg->ctrl, channel_id, adap_layer); | |
f3621440 | 199 | |
200 | /* Do RCU sync before initiating cleanup */ | |
201 | synchronize_rcu(); | |
8d545c8f SB |
202 | if (adap_layer->ctrlcmd != NULL) |
203 | adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0); | |
54e90fb5 | 204 | return 0; |
15c9ac0c SB |
205 | |
206 | } | |
bee925db | 207 | EXPORT_SYMBOL(caif_disconnect_client); |
5b208656 | 208 | |
8d545c8f | 209 | static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id) |
15c9ac0c | 210 | { |
15c9ac0c SB |
211 | } |
212 | ||
73d6ac63 | 213 | static const int protohead[CFCTRL_SRV_MASK] = { |
2aa40aef SB |
214 | [CFCTRL_SRV_VEI] = 4, |
215 | [CFCTRL_SRV_DATAGRAM] = 7, | |
216 | [CFCTRL_SRV_UTIL] = 4, | |
217 | [CFCTRL_SRV_RFM] = 3, | |
218 | [CFCTRL_SRV_DBG] = 3, | |
219 | }; | |
220 | ||
bee925db | 221 | |
222 | static int caif_connect_req_to_link_param(struct cfcnfg *cnfg, | |
223 | struct caif_connect_request *s, | |
224 | struct cfctrl_link_param *l) | |
225 | { | |
226 | struct dev_info *dev_info; | |
227 | enum cfcnfg_phy_preference pref; | |
228 | int res; | |
229 | ||
230 | memset(l, 0, sizeof(*l)); | |
231 | /* In caif protocol low value is high priority */ | |
232 | l->priority = CAIF_PRIO_MAX - s->priority + 1; | |
233 | ||
234 | if (s->ifindex != 0) { | |
235 | res = cfcnfg_get_id_from_ifi(cnfg, s->ifindex); | |
236 | if (res < 0) | |
237 | return res; | |
238 | l->phyid = res; | |
239 | } else { | |
240 | switch (s->link_selector) { | |
241 | case CAIF_LINK_HIGH_BANDW: | |
242 | pref = CFPHYPREF_HIGH_BW; | |
243 | break; | |
244 | case CAIF_LINK_LOW_LATENCY: | |
245 | pref = CFPHYPREF_LOW_LAT; | |
246 | break; | |
247 | default: | |
248 | return -EINVAL; | |
249 | } | |
250 | dev_info = cfcnfg_get_phyid(cnfg, pref); | |
251 | if (dev_info == NULL) | |
252 | return -ENODEV; | |
253 | l->phyid = dev_info->id; | |
254 | } | |
255 | switch (s->protocol) { | |
256 | case CAIFPROTO_AT: | |
257 | l->linktype = CFCTRL_SRV_VEI; | |
258 | l->endpoint = (s->sockaddr.u.at.type >> 2) & 0x3; | |
259 | l->chtype = s->sockaddr.u.at.type & 0x3; | |
260 | break; | |
261 | case CAIFPROTO_DATAGRAM: | |
262 | l->linktype = CFCTRL_SRV_DATAGRAM; | |
263 | l->chtype = 0x00; | |
264 | l->u.datagram.connid = s->sockaddr.u.dgm.connection_id; | |
265 | break; | |
266 | case CAIFPROTO_DATAGRAM_LOOP: | |
267 | l->linktype = CFCTRL_SRV_DATAGRAM; | |
268 | l->chtype = 0x03; | |
269 | l->endpoint = 0x00; | |
270 | l->u.datagram.connid = s->sockaddr.u.dgm.connection_id; | |
271 | break; | |
272 | case CAIFPROTO_RFM: | |
273 | l->linktype = CFCTRL_SRV_RFM; | |
274 | l->u.datagram.connid = s->sockaddr.u.rfm.connection_id; | |
275 | strncpy(l->u.rfm.volume, s->sockaddr.u.rfm.volume, | |
276 | sizeof(l->u.rfm.volume)-1); | |
277 | l->u.rfm.volume[sizeof(l->u.rfm.volume)-1] = 0; | |
278 | break; | |
279 | case CAIFPROTO_UTIL: | |
280 | l->linktype = CFCTRL_SRV_UTIL; | |
281 | l->endpoint = 0x00; | |
282 | l->chtype = 0x00; | |
283 | strncpy(l->u.utility.name, s->sockaddr.u.util.service, | |
284 | sizeof(l->u.utility.name)-1); | |
285 | l->u.utility.name[sizeof(l->u.utility.name)-1] = 0; | |
286 | caif_assert(sizeof(l->u.utility.name) > 10); | |
287 | l->u.utility.paramlen = s->param.size; | |
288 | if (l->u.utility.paramlen > sizeof(l->u.utility.params)) | |
289 | l->u.utility.paramlen = sizeof(l->u.utility.params); | |
290 | ||
291 | memcpy(l->u.utility.params, s->param.data, | |
292 | l->u.utility.paramlen); | |
293 | ||
294 | break; | |
295 | case CAIFPROTO_DEBUG: | |
296 | l->linktype = CFCTRL_SRV_DBG; | |
297 | l->endpoint = s->sockaddr.u.dbg.service; | |
298 | l->chtype = s->sockaddr.u.dbg.type; | |
299 | break; | |
300 | default: | |
301 | return -EINVAL; | |
302 | } | |
303 | return 0; | |
304 | } | |
305 | ||
306 | int caif_connect_client(struct net *net, struct caif_connect_request *conn_req, | |
307 | struct cflayer *adap_layer, int *ifindex, | |
2aa40aef SB |
308 | int *proto_head, |
309 | int *proto_tail) | |
15c9ac0c SB |
310 | { |
311 | struct cflayer *frml; | |
f3621440 | 312 | struct cfcnfg_phyinfo *phy; |
313 | int err; | |
bee925db | 314 | struct cfctrl_link_param param; |
315 | struct cfcnfg *cfg = get_cfcnfg(net); | |
316 | caif_assert(cfg != NULL); | |
f3621440 | 317 | |
318 | rcu_read_lock(); | |
bee925db | 319 | err = caif_connect_req_to_link_param(cfg, conn_req, ¶m); |
320 | if (err) | |
321 | goto unlock; | |
322 | ||
323 | phy = cfcnfg_get_phyinfo_rcu(cfg, param.phyid); | |
f3621440 | 324 | if (!phy) { |
325 | err = -ENODEV; | |
326 | goto unlock; | |
327 | } | |
328 | err = -EINVAL; | |
329 | ||
15c9ac0c | 330 | if (adap_layer == NULL) { |
b31fa5ba | 331 | pr_err("adap_layer is zero\n"); |
f3621440 | 332 | goto unlock; |
15c9ac0c SB |
333 | } |
334 | if (adap_layer->receive == NULL) { | |
b31fa5ba | 335 | pr_err("adap_layer->receive is NULL\n"); |
f3621440 | 336 | goto unlock; |
15c9ac0c SB |
337 | } |
338 | if (adap_layer->ctrlcmd == NULL) { | |
b31fa5ba | 339 | pr_err("adap_layer->ctrlcmd == NULL\n"); |
f3621440 | 340 | goto unlock; |
15c9ac0c | 341 | } |
f3621440 | 342 | |
343 | err = -ENODEV; | |
344 | frml = phy->frm_layer; | |
15c9ac0c | 345 | if (frml == NULL) { |
b31fa5ba | 346 | pr_err("Specified PHY type does not exist!\n"); |
f3621440 | 347 | goto unlock; |
15c9ac0c | 348 | } |
bee925db | 349 | caif_assert(param.phyid == phy->id); |
f3621440 | 350 | caif_assert(phy->frm_layer->id == |
bee925db | 351 | param.phyid); |
f3621440 | 352 | caif_assert(phy->phy_layer->id == |
bee925db | 353 | param.phyid); |
2aa40aef | 354 | |
f3621440 | 355 | *ifindex = phy->ifindex; |
356 | *proto_tail = 2; | |
2aa40aef | 357 | *proto_head = |
bee925db | 358 | |
359 | protohead[param.linktype] + (phy->use_stx ? 1 : 0); | |
2aa40aef | 360 | |
f3621440 | 361 | rcu_read_unlock(); |
2aa40aef | 362 | |
15c9ac0c | 363 | /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ |
bee925db | 364 | cfctrl_enum_req(cfg->ctrl, param.phyid); |
365 | return cfctrl_linkup_request(cfg->ctrl, ¶m, adap_layer); | |
f3621440 | 366 | |
367 | unlock: | |
368 | rcu_read_unlock(); | |
369 | return err; | |
15c9ac0c | 370 | } |
bee925db | 371 | EXPORT_SYMBOL(caif_connect_client); |
15c9ac0c | 372 | |
e539d83c | 373 | static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id, |
15c9ac0c SB |
374 | struct cflayer *adapt_layer) |
375 | { | |
376 | if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL) | |
377 | adapt_layer->ctrlcmd(adapt_layer, | |
378 | CAIF_CTRLCMD_INIT_FAIL_RSP, 0); | |
379 | } | |
380 | ||
381 | static void | |
e539d83c | 382 | cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, |
f3621440 | 383 | u8 phyid, struct cflayer *adapt_layer) |
15c9ac0c SB |
384 | { |
385 | struct cfcnfg *cnfg = container_obj(layer); | |
386 | struct cflayer *servicel = NULL; | |
387 | struct cfcnfg_phyinfo *phyinfo; | |
2aa40aef SB |
388 | struct net_device *netdev; |
389 | ||
54e90fb5 | 390 | if (channel_id == 0) { |
391 | pr_warn("received channel_id zero\n"); | |
392 | if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL) | |
393 | adapt_layer->ctrlcmd(adapt_layer, | |
394 | CAIF_CTRLCMD_INIT_FAIL_RSP, 0); | |
395 | return; | |
396 | } | |
397 | ||
f3621440 | 398 | rcu_read_lock(); |
399 | ||
15c9ac0c | 400 | if (adapt_layer == NULL) { |
f3621440 | 401 | pr_debug("link setup response but no client exist," |
402 | "send linkdown back\n"); | |
8d545c8f | 403 | cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL); |
f3621440 | 404 | goto unlock; |
15c9ac0c SB |
405 | } |
406 | ||
407 | caif_assert(cnfg != NULL); | |
408 | caif_assert(phyid != 0); | |
f3621440 | 409 | |
410 | phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phyid); | |
411 | if (phyinfo == NULL) { | |
412 | pr_err("ERROR: Link Layer Device dissapeared" | |
413 | "while connecting\n"); | |
414 | goto unlock; | |
415 | } | |
416 | ||
417 | caif_assert(phyinfo != NULL); | |
15c9ac0c SB |
418 | caif_assert(phyinfo->id == phyid); |
419 | caif_assert(phyinfo->phy_layer != NULL); | |
420 | caif_assert(phyinfo->phy_layer->id == phyid); | |
421 | ||
e539d83c | 422 | adapt_layer->id = channel_id; |
15c9ac0c SB |
423 | |
424 | switch (serv) { | |
425 | case CFCTRL_SRV_VEI: | |
e539d83c | 426 | servicel = cfvei_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
427 | break; |
428 | case CFCTRL_SRV_DATAGRAM: | |
f3621440 | 429 | servicel = cfdgml_create(channel_id, |
430 | &phyinfo->dev_info); | |
15c9ac0c SB |
431 | break; |
432 | case CFCTRL_SRV_RFM: | |
2aa40aef | 433 | netdev = phyinfo->dev_info.dev; |
a7da1f55 | 434 | servicel = cfrfml_create(channel_id, &phyinfo->dev_info, |
2aa40aef | 435 | netdev->mtu); |
15c9ac0c SB |
436 | break; |
437 | case CFCTRL_SRV_UTIL: | |
e539d83c | 438 | servicel = cfutill_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
439 | break; |
440 | case CFCTRL_SRV_VIDEO: | |
e539d83c | 441 | servicel = cfvidl_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
442 | break; |
443 | case CFCTRL_SRV_DBG: | |
e539d83c | 444 | servicel = cfdbgl_create(channel_id, &phyinfo->dev_info); |
15c9ac0c SB |
445 | break; |
446 | default: | |
f3621440 | 447 | pr_err("Protocol error. Link setup response " |
448 | "- unknown channel type\n"); | |
449 | goto unlock; | |
15c9ac0c SB |
450 | } |
451 | if (!servicel) { | |
b31fa5ba | 452 | pr_warn("Out of memory\n"); |
f3621440 | 453 | goto unlock; |
15c9ac0c SB |
454 | } |
455 | layer_set_dn(servicel, cnfg->mux); | |
e539d83c | 456 | cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id); |
15c9ac0c SB |
457 | layer_set_up(servicel, adapt_layer); |
458 | layer_set_dn(adapt_layer, servicel); | |
f3621440 | 459 | |
460 | rcu_read_unlock(); | |
461 | ||
15c9ac0c | 462 | servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0); |
f3621440 | 463 | return; |
464 | unlock: | |
465 | rcu_read_unlock(); | |
15c9ac0c SB |
466 | } |
467 | ||
468 | void | |
469 | cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type, | |
2aa40aef | 470 | struct net_device *dev, struct cflayer *phy_layer, |
bee925db | 471 | enum cfcnfg_phy_preference pref, |
15c9ac0c SB |
472 | bool fcs, bool stx) |
473 | { | |
474 | struct cflayer *frml; | |
475 | struct cflayer *phy_driver = NULL; | |
f3621440 | 476 | struct cfcnfg_phyinfo *phyinfo; |
15c9ac0c | 477 | int i; |
f3621440 | 478 | u8 phyid; |
15c9ac0c | 479 | |
f3621440 | 480 | mutex_lock(&cnfg->lock); |
15c9ac0c | 481 | |
f3621440 | 482 | /* CAIF protocol allow maximum 6 link-layers */ |
483 | for (i = 0; i < 7; i++) { | |
484 | phyid = (dev->ifindex + i) & 0x7; | |
485 | if (phyid == 0) | |
486 | continue; | |
487 | if (cfcnfg_get_phyinfo_rcu(cnfg, phyid) == NULL) | |
488 | goto got_phyid; | |
15c9ac0c | 489 | } |
f3621440 | 490 | pr_warn("Too many CAIF Link Layers (max 6)\n"); |
491 | goto out; | |
492 | ||
493 | got_phyid: | |
494 | phyinfo = kzalloc(sizeof(struct cfcnfg_phyinfo), GFP_ATOMIC); | |
15c9ac0c SB |
495 | |
496 | switch (phy_type) { | |
497 | case CFPHYTYPE_FRAG: | |
498 | phy_driver = | |
f3621440 | 499 | cfserl_create(CFPHYTYPE_FRAG, phyid, stx); |
15c9ac0c | 500 | if (!phy_driver) { |
b31fa5ba | 501 | pr_warn("Out of memory\n"); |
f3621440 | 502 | goto out; |
15c9ac0c | 503 | } |
15c9ac0c SB |
504 | break; |
505 | case CFPHYTYPE_CAIF: | |
506 | phy_driver = NULL; | |
507 | break; | |
508 | default: | |
f3621440 | 509 | goto out; |
15c9ac0c | 510 | } |
f3621440 | 511 | phy_layer->id = phyid; |
512 | phyinfo->pref = pref; | |
513 | phyinfo->id = phyid; | |
514 | phyinfo->dev_info.id = phyid; | |
515 | phyinfo->dev_info.dev = dev; | |
516 | phyinfo->phy_layer = phy_layer; | |
517 | phyinfo->ifindex = dev->ifindex; | |
518 | phyinfo->use_stx = stx; | |
519 | phyinfo->use_fcs = fcs; | |
2aa40aef | 520 | |
f3621440 | 521 | frml = cffrml_create(phyid, fcs); |
522 | ||
15c9ac0c | 523 | if (!frml) { |
b31fa5ba | 524 | pr_warn("Out of memory\n"); |
f3621440 | 525 | kfree(phyinfo); |
526 | goto out; | |
15c9ac0c | 527 | } |
f3621440 | 528 | phyinfo->frm_layer = frml; |
15c9ac0c SB |
529 | layer_set_up(frml, cnfg->mux); |
530 | ||
531 | if (phy_driver != NULL) { | |
f3621440 | 532 | phy_driver->id = phyid; |
15c9ac0c SB |
533 | layer_set_dn(frml, phy_driver); |
534 | layer_set_up(phy_driver, frml); | |
535 | layer_set_dn(phy_driver, phy_layer); | |
536 | layer_set_up(phy_layer, phy_driver); | |
537 | } else { | |
538 | layer_set_dn(frml, phy_layer); | |
539 | layer_set_up(phy_layer, frml); | |
540 | } | |
f3621440 | 541 | |
542 | list_add_rcu(&phyinfo->node, &cnfg->phys); | |
543 | out: | |
544 | mutex_unlock(&cnfg->lock); | |
15c9ac0c SB |
545 | } |
546 | EXPORT_SYMBOL(cfcnfg_add_phy_layer); | |
547 | ||
f3621440 | 548 | int cfcnfg_set_phy_state(struct cfcnfg *cnfg, struct cflayer *phy_layer, |
549 | bool up) | |
550 | { | |
551 | struct cfcnfg_phyinfo *phyinfo; | |
552 | ||
553 | rcu_read_lock(); | |
554 | phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phy_layer->id); | |
555 | if (phyinfo == NULL) { | |
556 | rcu_read_unlock(); | |
557 | return -ENODEV; | |
558 | } | |
559 | ||
560 | if (phyinfo->up == up) { | |
561 | rcu_read_unlock(); | |
562 | return 0; | |
563 | } | |
564 | phyinfo->up = up; | |
565 | ||
566 | if (up) { | |
567 | cffrml_hold(phyinfo->frm_layer); | |
568 | cfmuxl_set_dnlayer(cnfg->mux, phyinfo->frm_layer, | |
569 | phy_layer->id); | |
570 | } else { | |
571 | cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id); | |
572 | cffrml_put(phyinfo->frm_layer); | |
573 | } | |
574 | ||
575 | rcu_read_unlock(); | |
576 | return 0; | |
577 | } | |
578 | EXPORT_SYMBOL(cfcnfg_set_phy_state); | |
579 | ||
15c9ac0c SB |
580 | int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer) |
581 | { | |
582 | struct cflayer *frml, *frml_dn; | |
583 | u16 phyid; | |
f3621440 | 584 | struct cfcnfg_phyinfo *phyinfo; |
585 | ||
586 | might_sleep(); | |
587 | ||
588 | mutex_lock(&cnfg->lock); | |
589 | ||
15c9ac0c | 590 | phyid = phy_layer->id; |
f3621440 | 591 | phyinfo = cfcnfg_get_phyinfo_rcu(cnfg, phyid); |
592 | ||
bee925db | 593 | if (phyinfo == NULL) { |
594 | mutex_unlock(&cnfg->lock); | |
f3621440 | 595 | return 0; |
bee925db | 596 | } |
f3621440 | 597 | caif_assert(phyid == phyinfo->id); |
598 | caif_assert(phy_layer == phyinfo->phy_layer); | |
15c9ac0c | 599 | caif_assert(phy_layer->id == phyid); |
f3621440 | 600 | caif_assert(phyinfo->frm_layer->id == phyid); |
601 | ||
bee925db | 602 | list_del_rcu(&phyinfo->node); |
603 | synchronize_rcu(); | |
604 | ||
cb3cb423 | 605 | /* Fail if reference count is not zero */ |
606 | if (cffrml_refcnt_read(phyinfo->frm_layer) != 0) { | |
607 | pr_info("Wait for device inuse\n"); | |
bee925db | 608 | list_add_rcu(&phyinfo->node, &cnfg->phys); |
cb3cb423 | 609 | mutex_unlock(&cnfg->lock); |
610 | return -EAGAIN; | |
611 | } | |
612 | ||
f3621440 | 613 | frml = phyinfo->frm_layer; |
15c9ac0c SB |
614 | frml_dn = frml->dn; |
615 | cffrml_set_uplayer(frml, NULL); | |
616 | cffrml_set_dnlayer(frml, NULL); | |
15c9ac0c SB |
617 | if (phy_layer != frml_dn) { |
618 | layer_set_up(frml_dn, NULL); | |
619 | layer_set_dn(frml_dn, NULL); | |
15c9ac0c SB |
620 | } |
621 | layer_set_up(phy_layer, NULL); | |
f3621440 | 622 | |
f3621440 | 623 | if (phyinfo->phy_layer != frml_dn) |
624 | kfree(frml_dn); | |
625 | ||
cb3cb423 | 626 | cffrml_free(frml); |
f3621440 | 627 | kfree(phyinfo); |
628 | mutex_unlock(&cnfg->lock); | |
629 | ||
15c9ac0c SB |
630 | return 0; |
631 | } | |
632 | EXPORT_SYMBOL(cfcnfg_del_phy_layer); |