Commit | Line | Data |
---|---|---|
1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f25da51f AA |
2 | /* |
3 | * HWSIM IEEE 802.15.4 interface | |
4 | * | |
5 | * (C) 2018 Mojatau, Alexander Aring <aring@mojatau.com> | |
6 | * Copyright 2007-2012 Siemens AG | |
7 | * | |
f25da51f AA |
8 | * Based on fakelb, original Written by: |
9 | * Sergey Lapin <slapin@ossfans.org> | |
10 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
11 | * Alexander Smirnov <alex.bluesman.smirnov@gmail.com> | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/timer.h> | |
16 | #include <linux/platform_device.h> | |
1c9f4a3f | 17 | #include <linux/rtnetlink.h> |
f25da51f AA |
18 | #include <linux/netdevice.h> |
19 | #include <linux/device.h> | |
20 | #include <linux/spinlock.h> | |
21 | #include <net/mac802154.h> | |
22 | #include <net/cfg802154.h> | |
23 | #include <net/genetlink.h> | |
24 | #include "mac802154_hwsim.h" | |
25 | ||
26 | MODULE_DESCRIPTION("Software simulator of IEEE 802.15.4 radio(s) for mac802154"); | |
27 | MODULE_LICENSE("GPL"); | |
28 | ||
29 | static LIST_HEAD(hwsim_phys); | |
30 | static DEFINE_MUTEX(hwsim_phys_lock); | |
31 | ||
f25da51f AA |
32 | static struct platform_device *mac802154hwsim_dev; |
33 | ||
34 | /* MAC802154_HWSIM netlink family */ | |
35 | static struct genl_family hwsim_genl_family; | |
36 | ||
37 | static int hwsim_radio_idx; | |
38 | ||
39 | enum hwsim_multicast_groups { | |
40 | HWSIM_MCGRP_CONFIG, | |
41 | }; | |
42 | ||
43 | static const struct genl_multicast_group hwsim_mcgrps[] = { | |
44 | [HWSIM_MCGRP_CONFIG] = { .name = "config", }, | |
45 | }; | |
46 | ||
47 | struct hwsim_pib { | |
48 | u8 page; | |
49 | u8 channel; | |
50 | ||
51 | struct rcu_head rcu; | |
52 | }; | |
53 | ||
54 | struct hwsim_edge_info { | |
55 | u8 lqi; | |
56 | ||
57 | struct rcu_head rcu; | |
58 | }; | |
59 | ||
60 | struct hwsim_edge { | |
61 | struct hwsim_phy *endpoint; | |
c5d99d2b | 62 | struct hwsim_edge_info __rcu *info; |
f25da51f AA |
63 | |
64 | struct list_head list; | |
65 | struct rcu_head rcu; | |
66 | }; | |
67 | ||
68 | struct hwsim_phy { | |
69 | struct ieee802154_hw *hw; | |
70 | u32 idx; | |
71 | ||
72 | struct hwsim_pib __rcu *pib; | |
73 | ||
74 | bool suspended; | |
c5d99d2b | 75 | struct list_head edges; |
f25da51f AA |
76 | |
77 | struct list_head list; | |
f25da51f AA |
78 | }; |
79 | ||
80 | static int hwsim_add_one(struct genl_info *info, struct device *dev, | |
81 | bool init); | |
82 | static void hwsim_del(struct hwsim_phy *phy); | |
83 | ||
84 | static int hwsim_hw_ed(struct ieee802154_hw *hw, u8 *level) | |
85 | { | |
86 | *level = 0xbe; | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel) | |
92 | { | |
93 | struct hwsim_phy *phy = hw->priv; | |
94 | struct hwsim_pib *pib, *pib_old; | |
95 | ||
96 | pib = kzalloc(sizeof(*pib), GFP_KERNEL); | |
97 | if (!pib) | |
98 | return -ENOMEM; | |
99 | ||
100 | pib->page = page; | |
101 | pib->channel = channel; | |
102 | ||
1c9f4a3f | 103 | pib_old = rtnl_dereference(phy->pib); |
f25da51f AA |
104 | rcu_assign_pointer(phy->pib, pib); |
105 | kfree_rcu(pib_old, rcu); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int hwsim_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) | |
110 | { | |
111 | struct hwsim_phy *current_phy = hw->priv; | |
112 | struct hwsim_pib *current_pib, *endpoint_pib; | |
113 | struct hwsim_edge_info *einfo; | |
114 | struct hwsim_edge *e; | |
115 | ||
116 | WARN_ON(current_phy->suspended); | |
117 | ||
118 | rcu_read_lock(); | |
119 | current_pib = rcu_dereference(current_phy->pib); | |
120 | list_for_each_entry_rcu(e, ¤t_phy->edges, list) { | |
121 | /* Can be changed later in rx_irqsafe, but this is only a | |
122 | * performance tweak. Received radio should drop the frame | |
123 | * in mac802154 stack anyway... so we don't need to be | |
124 | * 100% of locking here to check on suspended | |
125 | */ | |
126 | if (e->endpoint->suspended) | |
127 | continue; | |
128 | ||
129 | endpoint_pib = rcu_dereference(e->endpoint->pib); | |
130 | if (current_pib->page == endpoint_pib->page && | |
131 | current_pib->channel == endpoint_pib->channel) { | |
132 | struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC); | |
133 | ||
134 | einfo = rcu_dereference(e->info); | |
135 | if (newskb) | |
136 | ieee802154_rx_irqsafe(e->endpoint->hw, newskb, | |
137 | einfo->lqi); | |
138 | } | |
139 | } | |
140 | rcu_read_unlock(); | |
141 | ||
142 | ieee802154_xmit_complete(hw, skb, false); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static int hwsim_hw_start(struct ieee802154_hw *hw) | |
147 | { | |
148 | struct hwsim_phy *phy = hw->priv; | |
149 | ||
150 | phy->suspended = false; | |
f25da51f AA |
151 | return 0; |
152 | } | |
153 | ||
154 | static void hwsim_hw_stop(struct ieee802154_hw *hw) | |
155 | { | |
156 | struct hwsim_phy *phy = hw->priv; | |
157 | ||
158 | phy->suspended = true; | |
f25da51f AA |
159 | } |
160 | ||
161 | static int | |
162 | hwsim_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on) | |
163 | { | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static const struct ieee802154_ops hwsim_ops = { | |
168 | .owner = THIS_MODULE, | |
169 | .xmit_async = hwsim_hw_xmit, | |
170 | .ed = hwsim_hw_ed, | |
171 | .set_channel = hwsim_hw_channel, | |
172 | .start = hwsim_hw_start, | |
173 | .stop = hwsim_hw_stop, | |
174 | .set_promiscuous_mode = hwsim_set_promiscuous_mode, | |
175 | }; | |
176 | ||
177 | static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info) | |
178 | { | |
179 | return hwsim_add_one(info, &mac802154hwsim_dev->dev, false); | |
180 | } | |
181 | ||
182 | static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info) | |
183 | { | |
184 | struct hwsim_phy *phy, *tmp; | |
185 | s64 idx = -1; | |
186 | ||
187 | if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]) | |
188 | return -EINVAL; | |
189 | ||
190 | idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]); | |
191 | ||
192 | mutex_lock(&hwsim_phys_lock); | |
193 | list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) { | |
194 | if (idx == phy->idx) { | |
195 | hwsim_del(phy); | |
196 | mutex_unlock(&hwsim_phys_lock); | |
197 | return 0; | |
198 | } | |
199 | } | |
200 | mutex_unlock(&hwsim_phys_lock); | |
201 | ||
202 | return -ENODEV; | |
203 | } | |
204 | ||
205 | static int append_radio_msg(struct sk_buff *skb, struct hwsim_phy *phy) | |
206 | { | |
207 | struct nlattr *nl_edges, *nl_edge; | |
208 | struct hwsim_edge_info *einfo; | |
209 | struct hwsim_edge *e; | |
210 | int ret; | |
211 | ||
212 | ret = nla_put_u32(skb, MAC802154_HWSIM_ATTR_RADIO_ID, phy->idx); | |
213 | if (ret < 0) | |
214 | return ret; | |
215 | ||
216 | rcu_read_lock(); | |
217 | if (list_empty(&phy->edges)) { | |
218 | rcu_read_unlock(); | |
219 | return 0; | |
220 | } | |
221 | ||
ae0be8de MK |
222 | nl_edges = nla_nest_start_noflag(skb, |
223 | MAC802154_HWSIM_ATTR_RADIO_EDGES); | |
f25da51f AA |
224 | if (!nl_edges) { |
225 | rcu_read_unlock(); | |
226 | return -ENOBUFS; | |
227 | } | |
228 | ||
229 | list_for_each_entry_rcu(e, &phy->edges, list) { | |
ae0be8de MK |
230 | nl_edge = nla_nest_start_noflag(skb, |
231 | MAC802154_HWSIM_ATTR_RADIO_EDGE); | |
f25da51f AA |
232 | if (!nl_edge) { |
233 | rcu_read_unlock(); | |
234 | nla_nest_cancel(skb, nl_edges); | |
235 | return -ENOBUFS; | |
236 | } | |
237 | ||
238 | ret = nla_put_u32(skb, MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID, | |
239 | e->endpoint->idx); | |
240 | if (ret < 0) { | |
241 | rcu_read_unlock(); | |
242 | nla_nest_cancel(skb, nl_edge); | |
243 | nla_nest_cancel(skb, nl_edges); | |
244 | return ret; | |
245 | } | |
246 | ||
247 | einfo = rcu_dereference(e->info); | |
248 | ret = nla_put_u8(skb, MAC802154_HWSIM_EDGE_ATTR_LQI, | |
249 | einfo->lqi); | |
250 | if (ret < 0) { | |
251 | rcu_read_unlock(); | |
252 | nla_nest_cancel(skb, nl_edge); | |
253 | nla_nest_cancel(skb, nl_edges); | |
254 | return ret; | |
255 | } | |
256 | ||
257 | nla_nest_end(skb, nl_edge); | |
258 | } | |
259 | rcu_read_unlock(); | |
260 | ||
261 | nla_nest_end(skb, nl_edges); | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | static int hwsim_get_radio(struct sk_buff *skb, struct hwsim_phy *phy, | |
267 | u32 portid, u32 seq, | |
268 | struct netlink_callback *cb, int flags) | |
269 | { | |
270 | void *hdr; | |
271 | int res = -EMSGSIZE; | |
272 | ||
273 | hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags, | |
274 | MAC802154_HWSIM_CMD_GET_RADIO); | |
275 | if (!hdr) | |
276 | return -EMSGSIZE; | |
277 | ||
278 | if (cb) | |
279 | genl_dump_check_consistent(cb, hdr); | |
280 | ||
281 | res = append_radio_msg(skb, phy); | |
282 | if (res < 0) | |
283 | goto out_err; | |
284 | ||
285 | genlmsg_end(skb, hdr); | |
286 | return 0; | |
287 | ||
288 | out_err: | |
289 | genlmsg_cancel(skb, hdr); | |
290 | return res; | |
291 | } | |
292 | ||
293 | static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info) | |
294 | { | |
295 | struct hwsim_phy *phy; | |
296 | struct sk_buff *skb; | |
297 | int idx, res = -ENODEV; | |
298 | ||
299 | if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]) | |
300 | return -EINVAL; | |
301 | idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]); | |
302 | ||
303 | mutex_lock(&hwsim_phys_lock); | |
304 | list_for_each_entry(phy, &hwsim_phys, list) { | |
305 | if (phy->idx != idx) | |
306 | continue; | |
307 | ||
308 | skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); | |
309 | if (!skb) { | |
310 | res = -ENOMEM; | |
311 | goto out_err; | |
312 | } | |
313 | ||
314 | res = hwsim_get_radio(skb, phy, info->snd_portid, | |
315 | info->snd_seq, NULL, 0); | |
316 | if (res < 0) { | |
317 | nlmsg_free(skb); | |
318 | goto out_err; | |
319 | } | |
320 | ||
19b39a25 | 321 | res = genlmsg_reply(skb, info); |
f25da51f AA |
322 | break; |
323 | } | |
324 | ||
325 | out_err: | |
326 | mutex_unlock(&hwsim_phys_lock); | |
327 | ||
328 | return res; | |
329 | } | |
330 | ||
331 | static int hwsim_dump_radio_nl(struct sk_buff *skb, | |
332 | struct netlink_callback *cb) | |
333 | { | |
334 | int idx = cb->args[0]; | |
335 | struct hwsim_phy *phy; | |
336 | int res; | |
337 | ||
338 | mutex_lock(&hwsim_phys_lock); | |
339 | ||
340 | if (idx == hwsim_radio_idx) | |
341 | goto done; | |
342 | ||
343 | list_for_each_entry(phy, &hwsim_phys, list) { | |
344 | if (phy->idx < idx) | |
345 | continue; | |
346 | ||
347 | res = hwsim_get_radio(skb, phy, NETLINK_CB(cb->skb).portid, | |
348 | cb->nlh->nlmsg_seq, cb, NLM_F_MULTI); | |
349 | if (res < 0) | |
350 | break; | |
351 | ||
352 | idx = phy->idx + 1; | |
353 | } | |
354 | ||
355 | cb->args[0] = idx; | |
356 | ||
357 | done: | |
358 | mutex_unlock(&hwsim_phys_lock); | |
359 | return skb->len; | |
360 | } | |
361 | ||
362 | /* caller need to held hwsim_phys_lock */ | |
363 | static struct hwsim_phy *hwsim_get_radio_by_id(uint32_t idx) | |
364 | { | |
365 | struct hwsim_phy *phy; | |
366 | ||
367 | list_for_each_entry(phy, &hwsim_phys, list) { | |
368 | if (phy->idx == idx) | |
369 | return phy; | |
370 | } | |
371 | ||
372 | return NULL; | |
373 | } | |
374 | ||
375 | static const struct nla_policy hwsim_edge_policy[MAC802154_HWSIM_EDGE_ATTR_MAX + 1] = { | |
376 | [MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] = { .type = NLA_U32 }, | |
377 | [MAC802154_HWSIM_EDGE_ATTR_LQI] = { .type = NLA_U8 }, | |
378 | }; | |
379 | ||
380 | static struct hwsim_edge *hwsim_alloc_edge(struct hwsim_phy *endpoint, u8 lqi) | |
381 | { | |
382 | struct hwsim_edge_info *einfo; | |
383 | struct hwsim_edge *e; | |
384 | ||
385 | e = kzalloc(sizeof(*e), GFP_KERNEL); | |
386 | if (!e) | |
387 | return NULL; | |
388 | ||
389 | einfo = kzalloc(sizeof(*einfo), GFP_KERNEL); | |
390 | if (!einfo) { | |
391 | kfree(e); | |
392 | return NULL; | |
393 | } | |
394 | ||
395 | einfo->lqi = 0xff; | |
1c9f4a3f | 396 | rcu_assign_pointer(e->info, einfo); |
f25da51f AA |
397 | e->endpoint = endpoint; |
398 | ||
399 | return e; | |
400 | } | |
401 | ||
402 | static void hwsim_free_edge(struct hwsim_edge *e) | |
403 | { | |
1c9f4a3f AA |
404 | struct hwsim_edge_info *einfo; |
405 | ||
406 | rcu_read_lock(); | |
407 | einfo = rcu_dereference(e->info); | |
408 | rcu_read_unlock(); | |
409 | ||
410 | kfree_rcu(einfo, rcu); | |
f25da51f AA |
411 | kfree_rcu(e, rcu); |
412 | } | |
413 | ||
414 | static int hwsim_new_edge_nl(struct sk_buff *msg, struct genl_info *info) | |
415 | { | |
416 | struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1]; | |
417 | struct hwsim_phy *phy_v0, *phy_v1; | |
418 | struct hwsim_edge *e; | |
419 | u32 v0, v1; | |
420 | ||
421 | if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] && | |
422 | !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE]) | |
423 | return -EINVAL; | |
424 | ||
8cb08174 | 425 | if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL)) |
f25da51f AA |
426 | return -EINVAL; |
427 | ||
428 | if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]) | |
429 | return -EINVAL; | |
430 | ||
431 | v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]); | |
432 | v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]); | |
433 | ||
434 | if (v0 == v1) | |
435 | return -EINVAL; | |
436 | ||
437 | mutex_lock(&hwsim_phys_lock); | |
438 | phy_v0 = hwsim_get_radio_by_id(v0); | |
439 | if (!phy_v0) { | |
440 | mutex_unlock(&hwsim_phys_lock); | |
441 | return -ENOENT; | |
442 | } | |
443 | ||
444 | phy_v1 = hwsim_get_radio_by_id(v1); | |
445 | if (!phy_v1) { | |
446 | mutex_unlock(&hwsim_phys_lock); | |
447 | return -ENOENT; | |
448 | } | |
449 | ||
450 | rcu_read_lock(); | |
451 | list_for_each_entry_rcu(e, &phy_v0->edges, list) { | |
452 | if (e->endpoint->idx == v1) { | |
453 | mutex_unlock(&hwsim_phys_lock); | |
454 | rcu_read_unlock(); | |
455 | return -EEXIST; | |
456 | } | |
457 | } | |
458 | rcu_read_unlock(); | |
459 | ||
460 | e = hwsim_alloc_edge(phy_v1, 0xff); | |
461 | if (!e) { | |
462 | mutex_unlock(&hwsim_phys_lock); | |
463 | return -ENOMEM; | |
464 | } | |
465 | list_add_rcu(&e->list, &phy_v0->edges); | |
466 | /* wait until changes are done under hwsim_phys_lock lock | |
467 | * should prevent of calling this function twice while | |
468 | * edges list has not the changes yet. | |
469 | */ | |
470 | synchronize_rcu(); | |
471 | mutex_unlock(&hwsim_phys_lock); | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info) | |
477 | { | |
478 | struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1]; | |
479 | struct hwsim_phy *phy_v0; | |
480 | struct hwsim_edge *e; | |
481 | u32 v0, v1; | |
482 | ||
483 | if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] && | |
484 | !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE]) | |
485 | return -EINVAL; | |
486 | ||
8cb08174 | 487 | if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL)) |
f25da51f AA |
488 | return -EINVAL; |
489 | ||
490 | if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]) | |
491 | return -EINVAL; | |
492 | ||
493 | v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]); | |
494 | v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]); | |
495 | ||
496 | mutex_lock(&hwsim_phys_lock); | |
497 | phy_v0 = hwsim_get_radio_by_id(v0); | |
498 | if (!phy_v0) { | |
499 | mutex_unlock(&hwsim_phys_lock); | |
500 | return -ENOENT; | |
501 | } | |
502 | ||
503 | rcu_read_lock(); | |
504 | list_for_each_entry_rcu(e, &phy_v0->edges, list) { | |
505 | if (e->endpoint->idx == v1) { | |
506 | rcu_read_unlock(); | |
507 | list_del_rcu(&e->list); | |
508 | hwsim_free_edge(e); | |
509 | /* same again - wait until list changes are done */ | |
510 | synchronize_rcu(); | |
511 | mutex_unlock(&hwsim_phys_lock); | |
512 | return 0; | |
513 | } | |
514 | } | |
515 | rcu_read_unlock(); | |
516 | ||
517 | mutex_unlock(&hwsim_phys_lock); | |
518 | ||
519 | return -ENOENT; | |
520 | } | |
521 | ||
522 | static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info) | |
523 | { | |
524 | struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1]; | |
525 | struct hwsim_edge_info *einfo; | |
526 | struct hwsim_phy *phy_v0; | |
527 | struct hwsim_edge *e; | |
528 | u32 v0, v1; | |
529 | u8 lqi; | |
530 | ||
531 | if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] && | |
532 | !info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE]) | |
533 | return -EINVAL; | |
534 | ||
8cb08174 | 535 | if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL)) |
f25da51f AA |
536 | return -EINVAL; |
537 | ||
538 | if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] && | |
539 | !edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI]) | |
540 | return -EINVAL; | |
541 | ||
542 | v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]); | |
543 | v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]); | |
544 | lqi = nla_get_u8(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI]); | |
545 | ||
546 | mutex_lock(&hwsim_phys_lock); | |
547 | phy_v0 = hwsim_get_radio_by_id(v0); | |
548 | if (!phy_v0) { | |
549 | mutex_unlock(&hwsim_phys_lock); | |
550 | return -ENOENT; | |
551 | } | |
552 | ||
553 | einfo = kzalloc(sizeof(*einfo), GFP_KERNEL); | |
470770bf | 554 | if (!einfo) { |
f25da51f AA |
555 | mutex_unlock(&hwsim_phys_lock); |
556 | return -ENOMEM; | |
557 | } | |
558 | ||
559 | rcu_read_lock(); | |
560 | list_for_each_entry_rcu(e, &phy_v0->edges, list) { | |
561 | if (e->endpoint->idx == v1) { | |
562 | einfo->lqi = lqi; | |
563 | rcu_assign_pointer(e->info, einfo); | |
564 | rcu_read_unlock(); | |
565 | mutex_unlock(&hwsim_phys_lock); | |
566 | return 0; | |
567 | } | |
568 | } | |
569 | rcu_read_unlock(); | |
570 | ||
571 | kfree(einfo); | |
572 | mutex_unlock(&hwsim_phys_lock); | |
573 | ||
574 | return -ENOENT; | |
575 | } | |
576 | ||
577 | /* MAC802154_HWSIM netlink policy */ | |
578 | ||
579 | static const struct nla_policy hwsim_genl_policy[MAC802154_HWSIM_ATTR_MAX + 1] = { | |
580 | [MAC802154_HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 }, | |
581 | [MAC802154_HWSIM_ATTR_RADIO_EDGE] = { .type = NLA_NESTED }, | |
582 | [MAC802154_HWSIM_ATTR_RADIO_EDGES] = { .type = NLA_NESTED }, | |
583 | }; | |
584 | ||
585 | /* Generic Netlink operations array */ | |
586 | static const struct genl_ops hwsim_nl_ops[] = { | |
587 | { | |
588 | .cmd = MAC802154_HWSIM_CMD_NEW_RADIO, | |
ef6243ac | 589 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
590 | .doit = hwsim_new_radio_nl, |
591 | .flags = GENL_UNS_ADMIN_PERM, | |
592 | }, | |
593 | { | |
594 | .cmd = MAC802154_HWSIM_CMD_DEL_RADIO, | |
ef6243ac | 595 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
596 | .doit = hwsim_del_radio_nl, |
597 | .flags = GENL_UNS_ADMIN_PERM, | |
598 | }, | |
599 | { | |
600 | .cmd = MAC802154_HWSIM_CMD_GET_RADIO, | |
ef6243ac | 601 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
602 | .doit = hwsim_get_radio_nl, |
603 | .dumpit = hwsim_dump_radio_nl, | |
604 | }, | |
605 | { | |
606 | .cmd = MAC802154_HWSIM_CMD_NEW_EDGE, | |
ef6243ac | 607 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
608 | .doit = hwsim_new_edge_nl, |
609 | .flags = GENL_UNS_ADMIN_PERM, | |
610 | }, | |
611 | { | |
612 | .cmd = MAC802154_HWSIM_CMD_DEL_EDGE, | |
ef6243ac | 613 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
614 | .doit = hwsim_del_edge_nl, |
615 | .flags = GENL_UNS_ADMIN_PERM, | |
616 | }, | |
617 | { | |
618 | .cmd = MAC802154_HWSIM_CMD_SET_EDGE, | |
ef6243ac | 619 | .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, |
f25da51f AA |
620 | .doit = hwsim_set_edge_lqi, |
621 | .flags = GENL_UNS_ADMIN_PERM, | |
622 | }, | |
623 | }; | |
624 | ||
625 | static struct genl_family hwsim_genl_family __ro_after_init = { | |
626 | .name = "MAC802154_HWSIM", | |
627 | .version = 1, | |
628 | .maxattr = MAC802154_HWSIM_ATTR_MAX, | |
3b0f31f2 | 629 | .policy = hwsim_genl_policy, |
f25da51f AA |
630 | .module = THIS_MODULE, |
631 | .ops = hwsim_nl_ops, | |
632 | .n_ops = ARRAY_SIZE(hwsim_nl_ops), | |
633 | .mcgrps = hwsim_mcgrps, | |
634 | .n_mcgrps = ARRAY_SIZE(hwsim_mcgrps), | |
635 | }; | |
636 | ||
637 | static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb, | |
638 | struct genl_info *info) | |
639 | { | |
640 | if (info) | |
641 | genl_notify(&hwsim_genl_family, mcast_skb, info, | |
642 | HWSIM_MCGRP_CONFIG, GFP_KERNEL); | |
643 | else | |
644 | genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0, | |
645 | HWSIM_MCGRP_CONFIG, GFP_KERNEL); | |
646 | } | |
647 | ||
648 | static void hwsim_mcast_new_radio(struct genl_info *info, struct hwsim_phy *phy) | |
649 | { | |
650 | struct sk_buff *mcast_skb; | |
651 | void *data; | |
652 | ||
653 | mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL); | |
654 | if (!mcast_skb) | |
655 | return; | |
656 | ||
657 | data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0, | |
658 | MAC802154_HWSIM_CMD_NEW_RADIO); | |
659 | if (!data) | |
660 | goto out_err; | |
661 | ||
662 | if (append_radio_msg(mcast_skb, phy) < 0) | |
663 | goto out_err; | |
664 | ||
665 | genlmsg_end(mcast_skb, data); | |
666 | ||
667 | hwsim_mcast_config_msg(mcast_skb, info); | |
668 | return; | |
669 | ||
670 | out_err: | |
671 | genlmsg_cancel(mcast_skb, data); | |
672 | nlmsg_free(mcast_skb); | |
673 | } | |
674 | ||
675 | static void hwsim_edge_unsubscribe_me(struct hwsim_phy *phy) | |
676 | { | |
677 | struct hwsim_phy *tmp; | |
678 | struct hwsim_edge *e; | |
679 | ||
680 | rcu_read_lock(); | |
681 | /* going to all phy edges and remove phy from it */ | |
682 | list_for_each_entry(tmp, &hwsim_phys, list) { | |
683 | list_for_each_entry_rcu(e, &tmp->edges, list) { | |
684 | if (e->endpoint->idx == phy->idx) { | |
685 | list_del_rcu(&e->list); | |
686 | hwsim_free_edge(e); | |
687 | } | |
688 | } | |
689 | } | |
690 | rcu_read_unlock(); | |
691 | ||
692 | synchronize_rcu(); | |
693 | } | |
694 | ||
695 | static int hwsim_subscribe_all_others(struct hwsim_phy *phy) | |
696 | { | |
697 | struct hwsim_phy *sub; | |
698 | struct hwsim_edge *e; | |
699 | ||
700 | list_for_each_entry(sub, &hwsim_phys, list) { | |
701 | e = hwsim_alloc_edge(sub, 0xff); | |
702 | if (!e) | |
703 | goto me_fail; | |
704 | ||
705 | list_add_rcu(&e->list, &phy->edges); | |
706 | } | |
707 | ||
708 | list_for_each_entry(sub, &hwsim_phys, list) { | |
709 | e = hwsim_alloc_edge(phy, 0xff); | |
710 | if (!e) | |
711 | goto sub_fail; | |
712 | ||
713 | list_add_rcu(&e->list, &sub->edges); | |
714 | } | |
715 | ||
716 | return 0; | |
717 | ||
718 | me_fail: | |
1c89a8e3 AA |
719 | rcu_read_lock(); |
720 | list_for_each_entry_rcu(e, &phy->edges, list) { | |
f25da51f AA |
721 | list_del_rcu(&e->list); |
722 | hwsim_free_edge(e); | |
723 | } | |
1c89a8e3 | 724 | rcu_read_unlock(); |
f25da51f AA |
725 | sub_fail: |
726 | hwsim_edge_unsubscribe_me(phy); | |
727 | return -ENOMEM; | |
728 | } | |
729 | ||
730 | static int hwsim_add_one(struct genl_info *info, struct device *dev, | |
731 | bool init) | |
732 | { | |
733 | struct ieee802154_hw *hw; | |
734 | struct hwsim_phy *phy; | |
735 | struct hwsim_pib *pib; | |
736 | int idx; | |
737 | int err; | |
738 | ||
739 | idx = hwsim_radio_idx++; | |
740 | ||
741 | hw = ieee802154_alloc_hw(sizeof(*phy), &hwsim_ops); | |
742 | if (!hw) | |
743 | return -ENOMEM; | |
744 | ||
745 | phy = hw->priv; | |
746 | phy->hw = hw; | |
747 | ||
748 | /* 868 MHz BPSK 802.15.4-2003 */ | |
749 | hw->phy->supported.channels[0] |= 1; | |
750 | /* 915 MHz BPSK 802.15.4-2003 */ | |
751 | hw->phy->supported.channels[0] |= 0x7fe; | |
752 | /* 2.4 GHz O-QPSK 802.15.4-2003 */ | |
753 | hw->phy->supported.channels[0] |= 0x7FFF800; | |
754 | /* 868 MHz ASK 802.15.4-2006 */ | |
755 | hw->phy->supported.channels[1] |= 1; | |
756 | /* 915 MHz ASK 802.15.4-2006 */ | |
757 | hw->phy->supported.channels[1] |= 0x7fe; | |
758 | /* 868 MHz O-QPSK 802.15.4-2006 */ | |
759 | hw->phy->supported.channels[2] |= 1; | |
760 | /* 915 MHz O-QPSK 802.15.4-2006 */ | |
761 | hw->phy->supported.channels[2] |= 0x7fe; | |
762 | /* 2.4 GHz CSS 802.15.4a-2007 */ | |
763 | hw->phy->supported.channels[3] |= 0x3fff; | |
764 | /* UWB Sub-gigahertz 802.15.4a-2007 */ | |
765 | hw->phy->supported.channels[4] |= 1; | |
766 | /* UWB Low band 802.15.4a-2007 */ | |
767 | hw->phy->supported.channels[4] |= 0x1e; | |
768 | /* UWB High band 802.15.4a-2007 */ | |
769 | hw->phy->supported.channels[4] |= 0xffe0; | |
770 | /* 750 MHz O-QPSK 802.15.4c-2009 */ | |
771 | hw->phy->supported.channels[5] |= 0xf; | |
772 | /* 750 MHz MPSK 802.15.4c-2009 */ | |
773 | hw->phy->supported.channels[5] |= 0xf0; | |
774 | /* 950 MHz BPSK 802.15.4d-2009 */ | |
775 | hw->phy->supported.channels[6] |= 0x3ff; | |
776 | /* 950 MHz GFSK 802.15.4d-2009 */ | |
777 | hw->phy->supported.channels[6] |= 0x3ffc00; | |
778 | ||
779 | ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); | |
780 | ||
781 | /* hwsim phy channel 13 as default */ | |
782 | hw->phy->current_channel = 13; | |
783 | pib = kzalloc(sizeof(*pib), GFP_KERNEL); | |
784 | if (!pib) { | |
785 | err = -ENOMEM; | |
786 | goto err_pib; | |
787 | } | |
788 | ||
1c9f4a3f | 789 | rcu_assign_pointer(phy->pib, pib); |
f25da51f AA |
790 | phy->idx = idx; |
791 | INIT_LIST_HEAD(&phy->edges); | |
792 | ||
793 | hw->flags = IEEE802154_HW_PROMISCUOUS; | |
794 | hw->parent = dev; | |
795 | ||
796 | err = ieee802154_register_hw(hw); | |
797 | if (err) | |
798 | goto err_reg; | |
799 | ||
800 | mutex_lock(&hwsim_phys_lock); | |
801 | if (init) { | |
802 | err = hwsim_subscribe_all_others(phy); | |
13403d69 WY |
803 | if (err < 0) { |
804 | mutex_unlock(&hwsim_phys_lock); | |
f25da51f | 805 | goto err_reg; |
13403d69 | 806 | } |
f25da51f AA |
807 | } |
808 | list_add_tail(&phy->list, &hwsim_phys); | |
809 | mutex_unlock(&hwsim_phys_lock); | |
810 | ||
811 | hwsim_mcast_new_radio(info, phy); | |
812 | ||
813 | return idx; | |
814 | ||
815 | err_reg: | |
816 | kfree(pib); | |
817 | err_pib: | |
818 | ieee802154_free_hw(phy->hw); | |
819 | return err; | |
820 | } | |
821 | ||
822 | static void hwsim_del(struct hwsim_phy *phy) | |
823 | { | |
1c9f4a3f AA |
824 | struct hwsim_pib *pib; |
825 | ||
f25da51f AA |
826 | hwsim_edge_unsubscribe_me(phy); |
827 | ||
828 | list_del(&phy->list); | |
1c9f4a3f AA |
829 | |
830 | rcu_read_lock(); | |
831 | pib = rcu_dereference(phy->pib); | |
832 | rcu_read_unlock(); | |
833 | ||
834 | kfree_rcu(pib, rcu); | |
f25da51f AA |
835 | |
836 | ieee802154_unregister_hw(phy->hw); | |
837 | ieee802154_free_hw(phy->hw); | |
838 | } | |
839 | ||
840 | static int hwsim_probe(struct platform_device *pdev) | |
841 | { | |
842 | struct hwsim_phy *phy, *tmp; | |
843 | int err, i; | |
844 | ||
845 | for (i = 0; i < 2; i++) { | |
846 | err = hwsim_add_one(NULL, &pdev->dev, true); | |
847 | if (err < 0) | |
848 | goto err_slave; | |
849 | } | |
850 | ||
851 | dev_info(&pdev->dev, "Added 2 mac802154 hwsim hardware radios\n"); | |
852 | return 0; | |
853 | ||
854 | err_slave: | |
855 | mutex_lock(&hwsim_phys_lock); | |
856 | list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) | |
857 | hwsim_del(phy); | |
858 | mutex_unlock(&hwsim_phys_lock); | |
859 | return err; | |
860 | } | |
861 | ||
862 | static int hwsim_remove(struct platform_device *pdev) | |
863 | { | |
864 | struct hwsim_phy *phy, *tmp; | |
865 | ||
866 | mutex_lock(&hwsim_phys_lock); | |
867 | list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) | |
868 | hwsim_del(phy); | |
869 | mutex_unlock(&hwsim_phys_lock); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static struct platform_driver mac802154hwsim_driver = { | |
875 | .probe = hwsim_probe, | |
876 | .remove = hwsim_remove, | |
877 | .driver = { | |
878 | .name = "mac802154_hwsim", | |
879 | }, | |
880 | }; | |
881 | ||
882 | static __init int hwsim_init_module(void) | |
883 | { | |
884 | int rc; | |
885 | ||
886 | rc = genl_register_family(&hwsim_genl_family); | |
887 | if (rc) | |
888 | return rc; | |
889 | ||
890 | mac802154hwsim_dev = platform_device_register_simple("mac802154_hwsim", | |
891 | -1, NULL, 0); | |
892 | if (IS_ERR(mac802154hwsim_dev)) { | |
893 | rc = PTR_ERR(mac802154hwsim_dev); | |
894 | goto platform_dev; | |
895 | } | |
896 | ||
897 | rc = platform_driver_register(&mac802154hwsim_driver); | |
898 | if (rc < 0) | |
899 | goto platform_drv; | |
900 | ||
901 | return 0; | |
902 | ||
903 | platform_drv: | |
904 | genl_unregister_family(&hwsim_genl_family); | |
905 | platform_dev: | |
906 | platform_device_unregister(mac802154hwsim_dev); | |
907 | return rc; | |
908 | } | |
909 | ||
910 | static __exit void hwsim_remove_module(void) | |
911 | { | |
912 | genl_unregister_family(&hwsim_genl_family); | |
913 | platform_driver_unregister(&mac802154hwsim_driver); | |
914 | platform_device_unregister(mac802154hwsim_dev); | |
915 | } | |
916 | ||
917 | module_init(hwsim_init_module); | |
918 | module_exit(hwsim_remove_module); |