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a910e4a9 SP |
1 | /* |
2 | * Datapath implementation for ST-Ericsson CW1200 mac80211 drivers | |
3 | * | |
4 | * Copyright (c) 2010, ST-Ericsson | |
5 | * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <net/mac80211.h> | |
13 | #include <linux/etherdevice.h> | |
14 | #include <linux/skbuff.h> | |
15 | ||
16 | #include "cw1200.h" | |
17 | #include "wsm.h" | |
18 | #include "bh.h" | |
19 | #include "sta.h" | |
20 | #include "debug.h" | |
21 | ||
22 | #define CW1200_INVALID_RATE_ID (0xFF) | |
23 | ||
24 | static int cw1200_handle_action_rx(struct cw1200_common *priv, | |
25 | struct sk_buff *skb); | |
26 | static const struct ieee80211_rate * | |
27 | cw1200_get_tx_rate(const struct cw1200_common *priv, | |
28 | const struct ieee80211_tx_rate *rate); | |
29 | ||
30 | /* ******************************************************************** */ | |
31 | /* TX queue lock / unlock */ | |
32 | ||
33 | static inline void cw1200_tx_queues_lock(struct cw1200_common *priv) | |
34 | { | |
35 | int i; | |
36 | for (i = 0; i < 4; ++i) | |
37 | cw1200_queue_lock(&priv->tx_queue[i]); | |
38 | } | |
39 | ||
40 | static inline void cw1200_tx_queues_unlock(struct cw1200_common *priv) | |
41 | { | |
42 | int i; | |
43 | for (i = 0; i < 4; ++i) | |
44 | cw1200_queue_unlock(&priv->tx_queue[i]); | |
45 | } | |
46 | ||
47 | /* ******************************************************************** */ | |
48 | /* TX policy cache implementation */ | |
49 | ||
50 | static void tx_policy_dump(struct tx_policy *policy) | |
51 | { | |
52 | pr_debug("[TX policy] %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X %.1X%.1X%.1X%.1X%.1X%.1X%.1X%.1X: %d\n", | |
53 | policy->raw[0] & 0x0F, policy->raw[0] >> 4, | |
54 | policy->raw[1] & 0x0F, policy->raw[1] >> 4, | |
55 | policy->raw[2] & 0x0F, policy->raw[2] >> 4, | |
56 | policy->raw[3] & 0x0F, policy->raw[3] >> 4, | |
57 | policy->raw[4] & 0x0F, policy->raw[4] >> 4, | |
58 | policy->raw[5] & 0x0F, policy->raw[5] >> 4, | |
59 | policy->raw[6] & 0x0F, policy->raw[6] >> 4, | |
60 | policy->raw[7] & 0x0F, policy->raw[7] >> 4, | |
61 | policy->raw[8] & 0x0F, policy->raw[8] >> 4, | |
62 | policy->raw[9] & 0x0F, policy->raw[9] >> 4, | |
63 | policy->raw[10] & 0x0F, policy->raw[10] >> 4, | |
64 | policy->raw[11] & 0x0F, policy->raw[11] >> 4, | |
65 | policy->defined); | |
66 | } | |
67 | ||
68 | static void tx_policy_build(const struct cw1200_common *priv, | |
69 | /* [out] */ struct tx_policy *policy, | |
70 | struct ieee80211_tx_rate *rates, size_t count) | |
71 | { | |
72 | int i, j; | |
73 | unsigned limit = priv->short_frame_max_tx_count; | |
74 | unsigned total = 0; | |
75 | BUG_ON(rates[0].idx < 0); | |
76 | memset(policy, 0, sizeof(*policy)); | |
77 | ||
a910e4a9 SP |
78 | /* Sort rates in descending order. */ |
79 | for (i = 1; i < count; ++i) { | |
80 | if (rates[i].idx < 0) { | |
81 | count = i; | |
82 | break; | |
83 | } | |
84 | if (rates[i].idx > rates[i - 1].idx) { | |
85 | struct ieee80211_tx_rate tmp = rates[i - 1]; | |
86 | rates[i - 1] = rates[i]; | |
87 | rates[i] = tmp; | |
88 | } | |
89 | } | |
90 | ||
91 | /* Eliminate duplicates. */ | |
92 | total = rates[0].count; | |
93 | for (i = 0, j = 1; j < count; ++j) { | |
94 | if (rates[j].idx == rates[i].idx) { | |
95 | rates[i].count += rates[j].count; | |
96 | } else if (rates[j].idx > rates[i].idx) { | |
97 | break; | |
98 | } else { | |
99 | ++i; | |
100 | if (i != j) | |
101 | rates[i] = rates[j]; | |
102 | } | |
103 | total += rates[j].count; | |
104 | } | |
105 | count = i + 1; | |
106 | ||
107 | /* Re-fill policy trying to keep every requested rate and with | |
8b3e7be4 SP |
108 | * respect to the global max tx retransmission count. |
109 | */ | |
a910e4a9 SP |
110 | if (limit < count) |
111 | limit = count; | |
112 | if (total > limit) { | |
113 | for (i = 0; i < count; ++i) { | |
114 | int left = count - i - 1; | |
115 | if (rates[i].count > limit - left) | |
116 | rates[i].count = limit - left; | |
117 | limit -= rates[i].count; | |
118 | } | |
119 | } | |
120 | ||
121 | /* HACK!!! Device has problems (at least) switching from | |
122 | * 54Mbps CTS to 1Mbps. This switch takes enormous amount | |
123 | * of time (100-200 ms), leading to valuable throughput drop. | |
124 | * As a workaround, additional g-rates are injected to the | |
125 | * policy. | |
126 | */ | |
127 | if (count == 2 && !(rates[0].flags & IEEE80211_TX_RC_MCS) && | |
128 | rates[0].idx > 4 && rates[0].count > 2 && | |
129 | rates[1].idx < 2) { | |
a910e4a9 SP |
130 | int mid_rate = (rates[0].idx + 4) >> 1; |
131 | ||
132 | /* Decrease number of retries for the initial rate */ | |
133 | rates[0].count -= 2; | |
134 | ||
135 | if (mid_rate != 4) { | |
136 | /* Keep fallback rate at 1Mbps. */ | |
137 | rates[3] = rates[1]; | |
138 | ||
139 | /* Inject 1 transmission on lowest g-rate */ | |
140 | rates[2].idx = 4; | |
141 | rates[2].count = 1; | |
142 | rates[2].flags = rates[1].flags; | |
143 | ||
144 | /* Inject 1 transmission on mid-rate */ | |
145 | rates[1].idx = mid_rate; | |
146 | rates[1].count = 1; | |
147 | ||
148 | /* Fallback to 1 Mbps is a really bad thing, | |
149 | * so let's try to increase probability of | |
150 | * successful transmission on the lowest g rate | |
8b3e7be4 SP |
151 | * even more |
152 | */ | |
a910e4a9 SP |
153 | if (rates[0].count >= 3) { |
154 | --rates[0].count; | |
155 | ++rates[2].count; | |
156 | } | |
157 | ||
158 | /* Adjust amount of rates defined */ | |
159 | count += 2; | |
160 | } else { | |
161 | /* Keep fallback rate at 1Mbps. */ | |
162 | rates[2] = rates[1]; | |
163 | ||
164 | /* Inject 2 transmissions on lowest g-rate */ | |
165 | rates[1].idx = 4; | |
166 | rates[1].count = 2; | |
167 | ||
168 | /* Adjust amount of rates defined */ | |
169 | count += 1; | |
170 | } | |
171 | } | |
172 | ||
173 | policy->defined = cw1200_get_tx_rate(priv, &rates[0])->hw_value + 1; | |
174 | ||
175 | for (i = 0; i < count; ++i) { | |
176 | register unsigned rateid, off, shift, retries; | |
177 | ||
178 | rateid = cw1200_get_tx_rate(priv, &rates[i])->hw_value; | |
179 | off = rateid >> 3; /* eq. rateid / 8 */ | |
180 | shift = (rateid & 0x07) << 2; /* eq. (rateid % 8) * 4 */ | |
181 | ||
182 | retries = rates[i].count; | |
183 | if (retries > 0x0F) { | |
184 | rates[i].count = 0x0f; | |
185 | retries = 0x0F; | |
186 | } | |
187 | policy->tbl[off] |= __cpu_to_le32(retries << shift); | |
188 | policy->retry_count += retries; | |
189 | } | |
190 | ||
f28bc92c | 191 | pr_debug("[TX policy] Policy (%zu): %d:%d, %d:%d, %d:%d, %d:%d\n", |
a910e4a9 SP |
192 | count, |
193 | rates[0].idx, rates[0].count, | |
194 | rates[1].idx, rates[1].count, | |
195 | rates[2].idx, rates[2].count, | |
f28bc92c | 196 | rates[3].idx, rates[3].count); |
a910e4a9 SP |
197 | } |
198 | ||
199 | static inline bool tx_policy_is_equal(const struct tx_policy *wanted, | |
200 | const struct tx_policy *cached) | |
201 | { | |
202 | size_t count = wanted->defined >> 1; | |
203 | if (wanted->defined > cached->defined) | |
204 | return false; | |
205 | if (count) { | |
206 | if (memcmp(wanted->raw, cached->raw, count)) | |
207 | return false; | |
208 | } | |
209 | if (wanted->defined & 1) { | |
210 | if ((wanted->raw[count] & 0x0F) != (cached->raw[count] & 0x0F)) | |
211 | return false; | |
212 | } | |
213 | return true; | |
214 | } | |
215 | ||
216 | static int tx_policy_find(struct tx_policy_cache *cache, | |
217 | const struct tx_policy *wanted) | |
218 | { | |
219 | /* O(n) complexity. Not so good, but there's only 8 entries in | |
220 | * the cache. | |
8b3e7be4 SP |
221 | * Also lru helps to reduce search time. |
222 | */ | |
a910e4a9 SP |
223 | struct tx_policy_cache_entry *it; |
224 | /* First search for policy in "used" list */ | |
225 | list_for_each_entry(it, &cache->used, link) { | |
226 | if (tx_policy_is_equal(wanted, &it->policy)) | |
227 | return it - cache->cache; | |
228 | } | |
229 | /* Then - in "free list" */ | |
230 | list_for_each_entry(it, &cache->free, link) { | |
231 | if (tx_policy_is_equal(wanted, &it->policy)) | |
232 | return it - cache->cache; | |
233 | } | |
234 | return -1; | |
235 | } | |
236 | ||
237 | static inline void tx_policy_use(struct tx_policy_cache *cache, | |
238 | struct tx_policy_cache_entry *entry) | |
239 | { | |
240 | ++entry->policy.usage_count; | |
241 | list_move(&entry->link, &cache->used); | |
242 | } | |
243 | ||
244 | static inline int tx_policy_release(struct tx_policy_cache *cache, | |
245 | struct tx_policy_cache_entry *entry) | |
246 | { | |
247 | int ret = --entry->policy.usage_count; | |
248 | if (!ret) | |
249 | list_move(&entry->link, &cache->free); | |
250 | return ret; | |
251 | } | |
252 | ||
253 | void tx_policy_clean(struct cw1200_common *priv) | |
254 | { | |
255 | int idx, locked; | |
256 | struct tx_policy_cache *cache = &priv->tx_policy_cache; | |
257 | struct tx_policy_cache_entry *entry; | |
258 | ||
259 | cw1200_tx_queues_lock(priv); | |
260 | spin_lock_bh(&cache->lock); | |
261 | locked = list_empty(&cache->free); | |
262 | ||
263 | for (idx = 0; idx < TX_POLICY_CACHE_SIZE; idx++) { | |
264 | entry = &cache->cache[idx]; | |
265 | /* Policy usage count should be 0 at this time as all queues | |
8b3e7be4 SP |
266 | should be empty |
267 | */ | |
a910e4a9 SP |
268 | if (WARN_ON(entry->policy.usage_count)) { |
269 | entry->policy.usage_count = 0; | |
270 | list_move(&entry->link, &cache->free); | |
271 | } | |
272 | memset(&entry->policy, 0, sizeof(entry->policy)); | |
273 | } | |
274 | if (locked) | |
275 | cw1200_tx_queues_unlock(priv); | |
276 | ||
277 | cw1200_tx_queues_unlock(priv); | |
278 | spin_unlock_bh(&cache->lock); | |
279 | } | |
280 | ||
281 | /* ******************************************************************** */ | |
282 | /* External TX policy cache API */ | |
283 | ||
284 | void tx_policy_init(struct cw1200_common *priv) | |
285 | { | |
286 | struct tx_policy_cache *cache = &priv->tx_policy_cache; | |
287 | int i; | |
288 | ||
289 | memset(cache, 0, sizeof(*cache)); | |
290 | ||
291 | spin_lock_init(&cache->lock); | |
292 | INIT_LIST_HEAD(&cache->used); | |
293 | INIT_LIST_HEAD(&cache->free); | |
294 | ||
295 | for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i) | |
296 | list_add(&cache->cache[i].link, &cache->free); | |
297 | } | |
298 | ||
299 | static int tx_policy_get(struct cw1200_common *priv, | |
300 | struct ieee80211_tx_rate *rates, | |
301 | size_t count, bool *renew) | |
302 | { | |
303 | int idx; | |
304 | struct tx_policy_cache *cache = &priv->tx_policy_cache; | |
305 | struct tx_policy wanted; | |
306 | ||
307 | tx_policy_build(priv, &wanted, rates, count); | |
308 | ||
309 | spin_lock_bh(&cache->lock); | |
310 | if (WARN_ON_ONCE(list_empty(&cache->free))) { | |
311 | spin_unlock_bh(&cache->lock); | |
312 | return CW1200_INVALID_RATE_ID; | |
313 | } | |
314 | idx = tx_policy_find(cache, &wanted); | |
315 | if (idx >= 0) { | |
316 | pr_debug("[TX policy] Used TX policy: %d\n", idx); | |
317 | *renew = false; | |
318 | } else { | |
319 | struct tx_policy_cache_entry *entry; | |
320 | *renew = true; | |
321 | /* If policy is not found create a new one | |
8b3e7be4 SP |
322 | * using the oldest entry in "free" list |
323 | */ | |
a910e4a9 SP |
324 | entry = list_entry(cache->free.prev, |
325 | struct tx_policy_cache_entry, link); | |
326 | entry->policy = wanted; | |
327 | idx = entry - cache->cache; | |
328 | pr_debug("[TX policy] New TX policy: %d\n", idx); | |
329 | tx_policy_dump(&entry->policy); | |
330 | } | |
331 | tx_policy_use(cache, &cache->cache[idx]); | |
332 | if (list_empty(&cache->free)) { | |
333 | /* Lock TX queues. */ | |
334 | cw1200_tx_queues_lock(priv); | |
335 | } | |
336 | spin_unlock_bh(&cache->lock); | |
337 | return idx; | |
338 | } | |
339 | ||
340 | static void tx_policy_put(struct cw1200_common *priv, int idx) | |
341 | { | |
342 | int usage, locked; | |
343 | struct tx_policy_cache *cache = &priv->tx_policy_cache; | |
344 | ||
345 | spin_lock_bh(&cache->lock); | |
346 | locked = list_empty(&cache->free); | |
347 | usage = tx_policy_release(cache, &cache->cache[idx]); | |
348 | if (locked && !usage) { | |
349 | /* Unlock TX queues. */ | |
350 | cw1200_tx_queues_unlock(priv); | |
351 | } | |
352 | spin_unlock_bh(&cache->lock); | |
353 | } | |
354 | ||
355 | static int tx_policy_upload(struct cw1200_common *priv) | |
356 | { | |
357 | struct tx_policy_cache *cache = &priv->tx_policy_cache; | |
358 | int i; | |
359 | struct wsm_set_tx_rate_retry_policy arg = { | |
360 | .num = 0, | |
361 | }; | |
362 | spin_lock_bh(&cache->lock); | |
363 | ||
364 | /* Upload only modified entries. */ | |
365 | for (i = 0; i < TX_POLICY_CACHE_SIZE; ++i) { | |
366 | struct tx_policy *src = &cache->cache[i].policy; | |
367 | if (src->retry_count && !src->uploaded) { | |
368 | struct wsm_tx_rate_retry_policy *dst = | |
369 | &arg.tbl[arg.num]; | |
370 | dst->index = i; | |
371 | dst->short_retries = priv->short_frame_max_tx_count; | |
372 | dst->long_retries = priv->long_frame_max_tx_count; | |
373 | ||
374 | dst->flags = WSM_TX_RATE_POLICY_FLAG_TERMINATE_WHEN_FINISHED | | |
375 | WSM_TX_RATE_POLICY_FLAG_COUNT_INITIAL_TRANSMIT; | |
376 | memcpy(dst->rate_count_indices, src->tbl, | |
377 | sizeof(dst->rate_count_indices)); | |
378 | src->uploaded = 1; | |
379 | ++arg.num; | |
380 | } | |
381 | } | |
382 | spin_unlock_bh(&cache->lock); | |
383 | cw1200_debug_tx_cache_miss(priv); | |
384 | pr_debug("[TX policy] Upload %d policies\n", arg.num); | |
385 | return wsm_set_tx_rate_retry_policy(priv, &arg); | |
386 | } | |
387 | ||
388 | void tx_policy_upload_work(struct work_struct *work) | |
389 | { | |
390 | struct cw1200_common *priv = | |
391 | container_of(work, struct cw1200_common, tx_policy_upload_work); | |
392 | ||
393 | pr_debug("[TX] TX policy upload.\n"); | |
394 | tx_policy_upload(priv); | |
395 | ||
396 | wsm_unlock_tx(priv); | |
397 | cw1200_tx_queues_unlock(priv); | |
398 | } | |
399 | ||
400 | /* ******************************************************************** */ | |
401 | /* cw1200 TX implementation */ | |
402 | ||
403 | struct cw1200_txinfo { | |
404 | struct sk_buff *skb; | |
405 | unsigned queue; | |
406 | struct ieee80211_tx_info *tx_info; | |
407 | const struct ieee80211_rate *rate; | |
408 | struct ieee80211_hdr *hdr; | |
409 | size_t hdrlen; | |
410 | const u8 *da; | |
411 | struct cw1200_sta_priv *sta_priv; | |
412 | struct ieee80211_sta *sta; | |
413 | struct cw1200_txpriv txpriv; | |
414 | }; | |
415 | ||
416 | u32 cw1200_rate_mask_to_wsm(struct cw1200_common *priv, u32 rates) | |
417 | { | |
418 | u32 ret = 0; | |
419 | int i; | |
420 | for (i = 0; i < 32; ++i) { | |
421 | if (rates & BIT(i)) | |
422 | ret |= BIT(priv->rates[i].hw_value); | |
423 | } | |
424 | return ret; | |
425 | } | |
426 | ||
427 | static const struct ieee80211_rate * | |
428 | cw1200_get_tx_rate(const struct cw1200_common *priv, | |
429 | const struct ieee80211_tx_rate *rate) | |
430 | { | |
431 | if (rate->idx < 0) | |
432 | return NULL; | |
433 | if (rate->flags & IEEE80211_TX_RC_MCS) | |
434 | return &priv->mcs_rates[rate->idx]; | |
435 | return &priv->hw->wiphy->bands[priv->channel->band]-> | |
436 | bitrates[rate->idx]; | |
437 | } | |
438 | ||
439 | static int | |
440 | cw1200_tx_h_calc_link_ids(struct cw1200_common *priv, | |
441 | struct cw1200_txinfo *t) | |
442 | { | |
443 | if (t->sta && t->sta_priv->link_id) | |
444 | t->txpriv.raw_link_id = | |
445 | t->txpriv.link_id = | |
446 | t->sta_priv->link_id; | |
447 | else if (priv->mode != NL80211_IFTYPE_AP) | |
448 | t->txpriv.raw_link_id = | |
449 | t->txpriv.link_id = 0; | |
450 | else if (is_multicast_ether_addr(t->da)) { | |
451 | if (priv->enable_beacon) { | |
452 | t->txpriv.raw_link_id = 0; | |
453 | t->txpriv.link_id = CW1200_LINK_ID_AFTER_DTIM; | |
454 | } else { | |
455 | t->txpriv.raw_link_id = 0; | |
456 | t->txpriv.link_id = 0; | |
457 | } | |
458 | } else { | |
459 | t->txpriv.link_id = cw1200_find_link_id(priv, t->da); | |
460 | if (!t->txpriv.link_id) | |
461 | t->txpriv.link_id = cw1200_alloc_link_id(priv, t->da); | |
462 | if (!t->txpriv.link_id) { | |
463 | wiphy_err(priv->hw->wiphy, | |
464 | "No more link IDs available.\n"); | |
465 | return -ENOENT; | |
466 | } | |
467 | t->txpriv.raw_link_id = t->txpriv.link_id; | |
468 | } | |
469 | if (t->txpriv.raw_link_id) | |
470 | priv->link_id_db[t->txpriv.raw_link_id - 1].timestamp = | |
471 | jiffies; | |
472 | if (t->sta && (t->sta->uapsd_queues & BIT(t->queue))) | |
473 | t->txpriv.link_id = CW1200_LINK_ID_UAPSD; | |
474 | return 0; | |
475 | } | |
476 | ||
477 | static void | |
478 | cw1200_tx_h_pm(struct cw1200_common *priv, | |
479 | struct cw1200_txinfo *t) | |
480 | { | |
481 | if (ieee80211_is_auth(t->hdr->frame_control)) { | |
482 | u32 mask = ~BIT(t->txpriv.raw_link_id); | |
483 | spin_lock_bh(&priv->ps_state_lock); | |
484 | priv->sta_asleep_mask &= mask; | |
485 | priv->pspoll_mask &= mask; | |
486 | spin_unlock_bh(&priv->ps_state_lock); | |
487 | } | |
488 | } | |
489 | ||
490 | static void | |
491 | cw1200_tx_h_calc_tid(struct cw1200_common *priv, | |
492 | struct cw1200_txinfo *t) | |
493 | { | |
494 | if (ieee80211_is_data_qos(t->hdr->frame_control)) { | |
495 | u8 *qos = ieee80211_get_qos_ctl(t->hdr); | |
496 | t->txpriv.tid = qos[0] & IEEE80211_QOS_CTL_TID_MASK; | |
497 | } else if (ieee80211_is_data(t->hdr->frame_control)) { | |
498 | t->txpriv.tid = 0; | |
499 | } | |
500 | } | |
501 | ||
502 | static int | |
503 | cw1200_tx_h_crypt(struct cw1200_common *priv, | |
504 | struct cw1200_txinfo *t) | |
505 | { | |
506 | if (!t->tx_info->control.hw_key || | |
507 | !ieee80211_has_protected(t->hdr->frame_control)) | |
508 | return 0; | |
509 | ||
510 | t->hdrlen += t->tx_info->control.hw_key->iv_len; | |
511 | skb_put(t->skb, t->tx_info->control.hw_key->icv_len); | |
512 | ||
513 | if (t->tx_info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) | |
514 | skb_put(t->skb, 8); /* MIC space */ | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static int | |
520 | cw1200_tx_h_align(struct cw1200_common *priv, | |
521 | struct cw1200_txinfo *t, | |
522 | u8 *flags) | |
523 | { | |
524 | size_t offset = (size_t)t->skb->data & 3; | |
525 | ||
526 | if (!offset) | |
527 | return 0; | |
528 | ||
529 | if (offset & 1) { | |
530 | wiphy_err(priv->hw->wiphy, | |
531 | "Bug: attempt to transmit a frame with wrong alignment: %zu\n", | |
532 | offset); | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
536 | if (skb_headroom(t->skb) < offset) { | |
537 | wiphy_err(priv->hw->wiphy, | |
538 | "Bug: no space allocated for DMA alignment. headroom: %d\n", | |
539 | skb_headroom(t->skb)); | |
540 | return -ENOMEM; | |
541 | } | |
542 | skb_push(t->skb, offset); | |
543 | t->hdrlen += offset; | |
544 | t->txpriv.offset += offset; | |
545 | *flags |= WSM_TX_2BYTES_SHIFT; | |
546 | cw1200_debug_tx_align(priv); | |
547 | return 0; | |
548 | } | |
549 | ||
550 | static int | |
551 | cw1200_tx_h_action(struct cw1200_common *priv, | |
552 | struct cw1200_txinfo *t) | |
553 | { | |
554 | struct ieee80211_mgmt *mgmt = | |
555 | (struct ieee80211_mgmt *)t->hdr; | |
556 | if (ieee80211_is_action(t->hdr->frame_control) && | |
557 | mgmt->u.action.category == WLAN_CATEGORY_BACK) | |
558 | return 1; | |
559 | else | |
560 | return 0; | |
561 | } | |
562 | ||
563 | /* Add WSM header */ | |
564 | static struct wsm_tx * | |
565 | cw1200_tx_h_wsm(struct cw1200_common *priv, | |
566 | struct cw1200_txinfo *t) | |
567 | { | |
568 | struct wsm_tx *wsm; | |
569 | ||
570 | if (skb_headroom(t->skb) < sizeof(struct wsm_tx)) { | |
571 | wiphy_err(priv->hw->wiphy, | |
572 | "Bug: no space allocated for WSM header. headroom: %d\n", | |
573 | skb_headroom(t->skb)); | |
574 | return NULL; | |
575 | } | |
576 | ||
577 | wsm = (struct wsm_tx *)skb_push(t->skb, sizeof(struct wsm_tx)); | |
578 | t->txpriv.offset += sizeof(struct wsm_tx); | |
579 | memset(wsm, 0, sizeof(*wsm)); | |
580 | wsm->hdr.len = __cpu_to_le16(t->skb->len); | |
581 | wsm->hdr.id = __cpu_to_le16(0x0004); | |
582 | wsm->queue_id = wsm_queue_id_to_wsm(t->queue); | |
583 | return wsm; | |
584 | } | |
585 | ||
586 | /* BT Coex specific handling */ | |
587 | static void | |
588 | cw1200_tx_h_bt(struct cw1200_common *priv, | |
589 | struct cw1200_txinfo *t, | |
590 | struct wsm_tx *wsm) | |
591 | { | |
592 | u8 priority = 0; | |
593 | ||
594 | if (!priv->bt_present) | |
595 | return; | |
596 | ||
597 | if (ieee80211_is_nullfunc(t->hdr->frame_control)) { | |
598 | priority = WSM_EPTA_PRIORITY_MGT; | |
599 | } else if (ieee80211_is_data(t->hdr->frame_control)) { | |
600 | /* Skip LLC SNAP header (+6) */ | |
601 | u8 *payload = &t->skb->data[t->hdrlen]; | |
7258416c SP |
602 | __be16 *ethertype = (__be16 *)&payload[6]; |
603 | if (be16_to_cpu(*ethertype) == ETH_P_PAE) | |
a910e4a9 SP |
604 | priority = WSM_EPTA_PRIORITY_EAPOL; |
605 | } else if (ieee80211_is_assoc_req(t->hdr->frame_control) || | |
606 | ieee80211_is_reassoc_req(t->hdr->frame_control)) { | |
607 | struct ieee80211_mgmt *mgt_frame = | |
608 | (struct ieee80211_mgmt *)t->hdr; | |
609 | ||
7258416c | 610 | if (le16_to_cpu(mgt_frame->u.assoc_req.listen_interval) < |
a910e4a9 SP |
611 | priv->listen_interval) { |
612 | pr_debug("Modified Listen Interval to %d from %d\n", | |
613 | priv->listen_interval, | |
614 | mgt_frame->u.assoc_req.listen_interval); | |
615 | /* Replace listen interval derieved from | |
8b3e7be4 SP |
616 | * the one read from SDD |
617 | */ | |
7258416c | 618 | mgt_frame->u.assoc_req.listen_interval = cpu_to_le16(priv->listen_interval); |
a910e4a9 SP |
619 | } |
620 | } | |
621 | ||
622 | if (!priority) { | |
623 | if (ieee80211_is_action(t->hdr->frame_control)) | |
624 | priority = WSM_EPTA_PRIORITY_ACTION; | |
625 | else if (ieee80211_is_mgmt(t->hdr->frame_control)) | |
626 | priority = WSM_EPTA_PRIORITY_MGT; | |
627 | else if ((wsm->queue_id == WSM_QUEUE_VOICE)) | |
628 | priority = WSM_EPTA_PRIORITY_VOICE; | |
629 | else if ((wsm->queue_id == WSM_QUEUE_VIDEO)) | |
630 | priority = WSM_EPTA_PRIORITY_VIDEO; | |
631 | else | |
632 | priority = WSM_EPTA_PRIORITY_DATA; | |
633 | } | |
634 | ||
635 | pr_debug("[TX] EPTA priority %d.\n", priority); | |
636 | ||
637 | wsm->flags |= priority << 1; | |
638 | } | |
639 | ||
640 | static int | |
641 | cw1200_tx_h_rate_policy(struct cw1200_common *priv, | |
642 | struct cw1200_txinfo *t, | |
643 | struct wsm_tx *wsm) | |
644 | { | |
645 | bool tx_policy_renew = false; | |
646 | ||
647 | t->txpriv.rate_id = tx_policy_get(priv, | |
648 | t->tx_info->control.rates, IEEE80211_TX_MAX_RATES, | |
649 | &tx_policy_renew); | |
650 | if (t->txpriv.rate_id == CW1200_INVALID_RATE_ID) | |
651 | return -EFAULT; | |
652 | ||
653 | wsm->flags |= t->txpriv.rate_id << 4; | |
654 | ||
655 | t->rate = cw1200_get_tx_rate(priv, | |
656 | &t->tx_info->control.rates[0]), | |
657 | wsm->max_tx_rate = t->rate->hw_value; | |
658 | if (t->rate->flags & IEEE80211_TX_RC_MCS) { | |
659 | if (cw1200_ht_greenfield(&priv->ht_info)) | |
660 | wsm->ht_tx_parameters |= | |
661 | __cpu_to_le32(WSM_HT_TX_GREENFIELD); | |
662 | else | |
663 | wsm->ht_tx_parameters |= | |
664 | __cpu_to_le32(WSM_HT_TX_MIXED); | |
665 | } | |
666 | ||
667 | if (tx_policy_renew) { | |
668 | pr_debug("[TX] TX policy renew.\n"); | |
669 | /* It's not so optimal to stop TX queues every now and then. | |
670 | * Better to reimplement task scheduling with | |
8b3e7be4 SP |
671 | * a counter. TODO. |
672 | */ | |
a910e4a9 SP |
673 | wsm_lock_tx_async(priv); |
674 | cw1200_tx_queues_lock(priv); | |
675 | if (queue_work(priv->workqueue, | |
676 | &priv->tx_policy_upload_work) <= 0) { | |
677 | cw1200_tx_queues_unlock(priv); | |
678 | wsm_unlock_tx(priv); | |
679 | } | |
680 | } | |
681 | return 0; | |
682 | } | |
683 | ||
684 | static bool | |
685 | cw1200_tx_h_pm_state(struct cw1200_common *priv, | |
686 | struct cw1200_txinfo *t) | |
687 | { | |
688 | int was_buffered = 1; | |
689 | ||
690 | if (t->txpriv.link_id == CW1200_LINK_ID_AFTER_DTIM && | |
691 | !priv->buffered_multicasts) { | |
692 | priv->buffered_multicasts = true; | |
693 | if (priv->sta_asleep_mask) | |
694 | queue_work(priv->workqueue, | |
695 | &priv->multicast_start_work); | |
696 | } | |
697 | ||
698 | if (t->txpriv.raw_link_id && t->txpriv.tid < CW1200_MAX_TID) | |
699 | was_buffered = priv->link_id_db[t->txpriv.raw_link_id - 1].buffered[t->txpriv.tid]++; | |
700 | ||
701 | return !was_buffered; | |
702 | } | |
703 | ||
704 | /* ******************************************************************** */ | |
705 | ||
706 | void cw1200_tx(struct ieee80211_hw *dev, | |
707 | struct ieee80211_tx_control *control, | |
708 | struct sk_buff *skb) | |
709 | { | |
710 | struct cw1200_common *priv = dev->priv; | |
711 | struct cw1200_txinfo t = { | |
712 | .skb = skb, | |
713 | .queue = skb_get_queue_mapping(skb), | |
714 | .tx_info = IEEE80211_SKB_CB(skb), | |
715 | .hdr = (struct ieee80211_hdr *)skb->data, | |
716 | .txpriv.tid = CW1200_MAX_TID, | |
717 | .txpriv.rate_id = CW1200_INVALID_RATE_ID, | |
718 | }; | |
719 | struct ieee80211_sta *sta; | |
720 | struct wsm_tx *wsm; | |
721 | bool tid_update = 0; | |
722 | u8 flags = 0; | |
723 | int ret; | |
724 | ||
725 | if (priv->bh_error) | |
726 | goto drop; | |
727 | ||
728 | t.hdrlen = ieee80211_hdrlen(t.hdr->frame_control); | |
729 | t.da = ieee80211_get_DA(t.hdr); | |
730 | if (control) { | |
731 | t.sta = control->sta; | |
732 | t.sta_priv = (struct cw1200_sta_priv *)&t.sta->drv_priv; | |
733 | } | |
734 | ||
735 | if (WARN_ON(t.queue >= 4)) | |
736 | goto drop; | |
737 | ||
738 | ret = cw1200_tx_h_calc_link_ids(priv, &t); | |
739 | if (ret) | |
740 | goto drop; | |
741 | ||
742 | pr_debug("[TX] TX %d bytes (queue: %d, link_id: %d (%d)).\n", | |
743 | skb->len, t.queue, t.txpriv.link_id, | |
744 | t.txpriv.raw_link_id); | |
745 | ||
746 | cw1200_tx_h_pm(priv, &t); | |
747 | cw1200_tx_h_calc_tid(priv, &t); | |
748 | ret = cw1200_tx_h_crypt(priv, &t); | |
749 | if (ret) | |
750 | goto drop; | |
751 | ret = cw1200_tx_h_align(priv, &t, &flags); | |
752 | if (ret) | |
753 | goto drop; | |
754 | ret = cw1200_tx_h_action(priv, &t); | |
755 | if (ret) | |
756 | goto drop; | |
757 | wsm = cw1200_tx_h_wsm(priv, &t); | |
758 | if (!wsm) { | |
759 | ret = -ENOMEM; | |
760 | goto drop; | |
761 | } | |
762 | wsm->flags |= flags; | |
763 | cw1200_tx_h_bt(priv, &t, wsm); | |
764 | ret = cw1200_tx_h_rate_policy(priv, &t, wsm); | |
765 | if (ret) | |
766 | goto drop; | |
767 | ||
768 | rcu_read_lock(); | |
769 | sta = rcu_dereference(t.sta); | |
770 | ||
771 | spin_lock_bh(&priv->ps_state_lock); | |
772 | { | |
773 | tid_update = cw1200_tx_h_pm_state(priv, &t); | |
774 | BUG_ON(cw1200_queue_put(&priv->tx_queue[t.queue], | |
775 | t.skb, &t.txpriv)); | |
776 | } | |
777 | spin_unlock_bh(&priv->ps_state_lock); | |
778 | ||
779 | if (tid_update && sta) | |
780 | ieee80211_sta_set_buffered(sta, t.txpriv.tid, true); | |
781 | ||
782 | rcu_read_unlock(); | |
783 | ||
784 | cw1200_bh_wakeup(priv); | |
785 | ||
786 | return; | |
787 | ||
788 | drop: | |
789 | cw1200_skb_dtor(priv, skb, &t.txpriv); | |
790 | return; | |
791 | } | |
792 | ||
793 | /* ******************************************************************** */ | |
794 | ||
795 | static int cw1200_handle_action_rx(struct cw1200_common *priv, | |
796 | struct sk_buff *skb) | |
797 | { | |
798 | struct ieee80211_mgmt *mgmt = (void *)skb->data; | |
799 | ||
800 | /* Filter block ACK negotiation: fully controlled by firmware */ | |
801 | if (mgmt->u.action.category == WLAN_CATEGORY_BACK) | |
802 | return 1; | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static int cw1200_handle_pspoll(struct cw1200_common *priv, | |
808 | struct sk_buff *skb) | |
809 | { | |
810 | struct ieee80211_sta *sta; | |
811 | struct ieee80211_pspoll *pspoll = (struct ieee80211_pspoll *)skb->data; | |
812 | int link_id = 0; | |
813 | u32 pspoll_mask = 0; | |
814 | int drop = 1; | |
815 | int i; | |
816 | ||
817 | if (priv->join_status != CW1200_JOIN_STATUS_AP) | |
818 | goto done; | |
819 | if (memcmp(priv->vif->addr, pspoll->bssid, ETH_ALEN)) | |
820 | goto done; | |
821 | ||
822 | rcu_read_lock(); | |
823 | sta = ieee80211_find_sta(priv->vif, pspoll->ta); | |
824 | if (sta) { | |
825 | struct cw1200_sta_priv *sta_priv; | |
826 | sta_priv = (struct cw1200_sta_priv *)&sta->drv_priv; | |
827 | link_id = sta_priv->link_id; | |
828 | pspoll_mask = BIT(sta_priv->link_id); | |
829 | } | |
830 | rcu_read_unlock(); | |
831 | if (!link_id) | |
832 | goto done; | |
833 | ||
834 | priv->pspoll_mask |= pspoll_mask; | |
835 | drop = 0; | |
836 | ||
8b3e7be4 | 837 | /* Do not report pspols if data for given link id is queued already. */ |
a910e4a9 SP |
838 | for (i = 0; i < 4; ++i) { |
839 | if (cw1200_queue_get_num_queued(&priv->tx_queue[i], | |
840 | pspoll_mask)) { | |
841 | cw1200_bh_wakeup(priv); | |
842 | drop = 1; | |
843 | break; | |
844 | } | |
845 | } | |
846 | pr_debug("[RX] PSPOLL: %s\n", drop ? "local" : "fwd"); | |
847 | done: | |
848 | return drop; | |
849 | } | |
850 | ||
851 | /* ******************************************************************** */ | |
852 | ||
853 | void cw1200_tx_confirm_cb(struct cw1200_common *priv, | |
854 | int link_id, | |
855 | struct wsm_tx_confirm *arg) | |
856 | { | |
857 | u8 queue_id = cw1200_queue_get_queue_id(arg->packet_id); | |
858 | struct cw1200_queue *queue = &priv->tx_queue[queue_id]; | |
859 | struct sk_buff *skb; | |
860 | const struct cw1200_txpriv *txpriv; | |
861 | ||
862 | pr_debug("[TX] TX confirm: %d, %d.\n", | |
863 | arg->status, arg->ack_failures); | |
864 | ||
a910e4a9 SP |
865 | if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) { |
866 | /* STA is stopped. */ | |
867 | return; | |
868 | } | |
869 | ||
870 | if (WARN_ON(queue_id >= 4)) | |
871 | return; | |
872 | ||
873 | if (arg->status) | |
874 | pr_debug("TX failed: %d.\n", arg->status); | |
875 | ||
876 | if ((arg->status == WSM_REQUEUE) && | |
877 | (arg->flags & WSM_TX_STATUS_REQUEUE)) { | |
878 | /* "Requeue" means "implicit suspend" */ | |
879 | struct wsm_suspend_resume suspend = { | |
880 | .link_id = link_id, | |
881 | .stop = 1, | |
882 | .multicast = !link_id, | |
883 | }; | |
884 | cw1200_suspend_resume(priv, &suspend); | |
885 | wiphy_warn(priv->hw->wiphy, "Requeue for link_id %d (try %d). STAs asleep: 0x%.8X\n", | |
886 | link_id, | |
887 | cw1200_queue_get_generation(arg->packet_id) + 1, | |
888 | priv->sta_asleep_mask); | |
889 | cw1200_queue_requeue(queue, arg->packet_id); | |
890 | spin_lock_bh(&priv->ps_state_lock); | |
891 | if (!link_id) { | |
892 | priv->buffered_multicasts = true; | |
893 | if (priv->sta_asleep_mask) { | |
894 | queue_work(priv->workqueue, | |
895 | &priv->multicast_start_work); | |
896 | } | |
897 | } | |
898 | spin_unlock_bh(&priv->ps_state_lock); | |
899 | } else if (!cw1200_queue_get_skb(queue, arg->packet_id, | |
900 | &skb, &txpriv)) { | |
901 | struct ieee80211_tx_info *tx = IEEE80211_SKB_CB(skb); | |
902 | int tx_count = arg->ack_failures; | |
903 | u8 ht_flags = 0; | |
904 | int i; | |
905 | ||
906 | if (cw1200_ht_greenfield(&priv->ht_info)) | |
907 | ht_flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
908 | ||
909 | spin_lock(&priv->bss_loss_lock); | |
910 | if (priv->bss_loss_state && | |
911 | arg->packet_id == priv->bss_loss_confirm_id) { | |
912 | if (arg->status) { | |
913 | /* Recovery failed */ | |
914 | __cw1200_cqm_bssloss_sm(priv, 0, 0, 1); | |
915 | } else { | |
916 | /* Recovery succeeded */ | |
917 | __cw1200_cqm_bssloss_sm(priv, 0, 1, 0); | |
918 | } | |
919 | } | |
920 | spin_unlock(&priv->bss_loss_lock); | |
921 | ||
922 | if (!arg->status) { | |
923 | tx->flags |= IEEE80211_TX_STAT_ACK; | |
924 | ++tx_count; | |
925 | cw1200_debug_txed(priv); | |
926 | if (arg->flags & WSM_TX_STATUS_AGGREGATION) { | |
927 | /* Do not report aggregation to mac80211: | |
8b3e7be4 SP |
928 | * it confuses minstrel a lot. |
929 | */ | |
a910e4a9 SP |
930 | /* tx->flags |= IEEE80211_TX_STAT_AMPDU; */ |
931 | cw1200_debug_txed_agg(priv); | |
932 | } | |
933 | } else { | |
934 | if (tx_count) | |
935 | ++tx_count; | |
936 | } | |
937 | ||
938 | for (i = 0; i < IEEE80211_TX_MAX_RATES; ++i) { | |
939 | if (tx->status.rates[i].count >= tx_count) { | |
940 | tx->status.rates[i].count = tx_count; | |
941 | break; | |
942 | } | |
943 | tx_count -= tx->status.rates[i].count; | |
944 | if (tx->status.rates[i].flags & IEEE80211_TX_RC_MCS) | |
945 | tx->status.rates[i].flags |= ht_flags; | |
946 | } | |
947 | ||
948 | for (++i; i < IEEE80211_TX_MAX_RATES; ++i) { | |
949 | tx->status.rates[i].count = 0; | |
950 | tx->status.rates[i].idx = -1; | |
951 | } | |
952 | ||
953 | /* Pull off any crypto trailers that we added on */ | |
954 | if (tx->control.hw_key) { | |
955 | skb_trim(skb, skb->len - tx->control.hw_key->icv_len); | |
956 | if (tx->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) | |
957 | skb_trim(skb, skb->len - 8); /* MIC space */ | |
958 | } | |
959 | cw1200_queue_remove(queue, arg->packet_id); | |
960 | } | |
961 | /* XXX TODO: Only wake if there are pending transmits.. */ | |
962 | cw1200_bh_wakeup(priv); | |
963 | } | |
964 | ||
965 | static void cw1200_notify_buffered_tx(struct cw1200_common *priv, | |
966 | struct sk_buff *skb, int link_id, int tid) | |
967 | { | |
968 | struct ieee80211_sta *sta; | |
969 | struct ieee80211_hdr *hdr; | |
970 | u8 *buffered; | |
971 | u8 still_buffered = 0; | |
972 | ||
973 | if (link_id && tid < CW1200_MAX_TID) { | |
974 | buffered = priv->link_id_db | |
975 | [link_id - 1].buffered; | |
976 | ||
977 | spin_lock_bh(&priv->ps_state_lock); | |
978 | if (!WARN_ON(!buffered[tid])) | |
979 | still_buffered = --buffered[tid]; | |
980 | spin_unlock_bh(&priv->ps_state_lock); | |
981 | ||
982 | if (!still_buffered && tid < CW1200_MAX_TID) { | |
983 | hdr = (struct ieee80211_hdr *)skb->data; | |
984 | rcu_read_lock(); | |
985 | sta = ieee80211_find_sta(priv->vif, hdr->addr1); | |
986 | if (sta) | |
987 | ieee80211_sta_set_buffered(sta, tid, false); | |
988 | rcu_read_unlock(); | |
989 | } | |
990 | } | |
991 | } | |
992 | ||
993 | void cw1200_skb_dtor(struct cw1200_common *priv, | |
994 | struct sk_buff *skb, | |
995 | const struct cw1200_txpriv *txpriv) | |
996 | { | |
997 | skb_pull(skb, txpriv->offset); | |
998 | if (txpriv->rate_id != CW1200_INVALID_RATE_ID) { | |
999 | cw1200_notify_buffered_tx(priv, skb, | |
1000 | txpriv->raw_link_id, txpriv->tid); | |
1001 | tx_policy_put(priv, txpriv->rate_id); | |
1002 | } | |
fa8eeae1 | 1003 | ieee80211_tx_status(priv->hw, skb); |
a910e4a9 SP |
1004 | } |
1005 | ||
1006 | void cw1200_rx_cb(struct cw1200_common *priv, | |
1007 | struct wsm_rx *arg, | |
1008 | int link_id, | |
1009 | struct sk_buff **skb_p) | |
1010 | { | |
1011 | struct sk_buff *skb = *skb_p; | |
1012 | struct ieee80211_rx_status *hdr = IEEE80211_SKB_RXCB(skb); | |
1013 | struct ieee80211_hdr *frame = (struct ieee80211_hdr *)skb->data; | |
1014 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; | |
1015 | struct cw1200_link_entry *entry = NULL; | |
1016 | unsigned long grace_period; | |
1017 | ||
1018 | bool early_data = false; | |
1019 | bool p2p = priv->vif && priv->vif->p2p; | |
1020 | size_t hdrlen; | |
1021 | hdr->flag = 0; | |
1022 | ||
1023 | if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) { | |
1024 | /* STA is stopped. */ | |
1025 | goto drop; | |
1026 | } | |
1027 | ||
1028 | if (link_id && link_id <= CW1200_MAX_STA_IN_AP_MODE) { | |
1029 | entry = &priv->link_id_db[link_id - 1]; | |
1030 | if (entry->status == CW1200_LINK_SOFT && | |
1031 | ieee80211_is_data(frame->frame_control)) | |
1032 | early_data = true; | |
1033 | entry->timestamp = jiffies; | |
1034 | } else if (p2p && | |
1035 | ieee80211_is_action(frame->frame_control) && | |
1036 | (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) { | |
1037 | pr_debug("[RX] Going to MAP&RESET link ID\n"); | |
1038 | WARN_ON(work_pending(&priv->linkid_reset_work)); | |
1039 | memcpy(&priv->action_frame_sa[0], | |
1040 | ieee80211_get_SA(frame), ETH_ALEN); | |
1041 | priv->action_linkid = 0; | |
1042 | schedule_work(&priv->linkid_reset_work); | |
1043 | } | |
1044 | ||
1045 | if (link_id && p2p && | |
1046 | ieee80211_is_action(frame->frame_control) && | |
1047 | (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC)) { | |
1048 | /* Link ID already exists for the ACTION frame. | |
8b3e7be4 SP |
1049 | * Reset and Remap |
1050 | */ | |
a910e4a9 SP |
1051 | WARN_ON(work_pending(&priv->linkid_reset_work)); |
1052 | memcpy(&priv->action_frame_sa[0], | |
1053 | ieee80211_get_SA(frame), ETH_ALEN); | |
1054 | priv->action_linkid = link_id; | |
1055 | schedule_work(&priv->linkid_reset_work); | |
1056 | } | |
1057 | if (arg->status) { | |
1058 | if (arg->status == WSM_STATUS_MICFAILURE) { | |
1059 | pr_debug("[RX] MIC failure.\n"); | |
1060 | hdr->flag |= RX_FLAG_MMIC_ERROR; | |
1061 | } else if (arg->status == WSM_STATUS_NO_KEY_FOUND) { | |
1062 | pr_debug("[RX] No key found.\n"); | |
1063 | goto drop; | |
1064 | } else { | |
1065 | pr_debug("[RX] Receive failure: %d.\n", | |
1066 | arg->status); | |
1067 | goto drop; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | if (skb->len < sizeof(struct ieee80211_pspoll)) { | |
1072 | wiphy_warn(priv->hw->wiphy, "Mailformed SDU rx'ed. Size is lesser than IEEE header.\n"); | |
1073 | goto drop; | |
1074 | } | |
1075 | ||
1076 | if (ieee80211_is_pspoll(frame->frame_control)) | |
1077 | if (cw1200_handle_pspoll(priv, skb)) | |
1078 | goto drop; | |
1079 | ||
a910e4a9 SP |
1080 | hdr->band = ((arg->channel_number & 0xff00) || |
1081 | (arg->channel_number > 14)) ? | |
1082 | IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ; | |
1083 | hdr->freq = ieee80211_channel_to_frequency( | |
1084 | arg->channel_number, | |
1085 | hdr->band); | |
1086 | ||
1087 | if (arg->rx_rate >= 14) { | |
1088 | hdr->flag |= RX_FLAG_HT; | |
1089 | hdr->rate_idx = arg->rx_rate - 14; | |
1090 | } else if (arg->rx_rate >= 4) { | |
1091 | hdr->rate_idx = arg->rx_rate - 2; | |
1092 | } else { | |
1093 | hdr->rate_idx = arg->rx_rate; | |
1094 | } | |
1095 | ||
1096 | hdr->signal = (s8)arg->rcpi_rssi; | |
1097 | hdr->antenna = 0; | |
1098 | ||
1099 | hdrlen = ieee80211_hdrlen(frame->frame_control); | |
1100 | ||
1101 | if (WSM_RX_STATUS_ENCRYPTION(arg->flags)) { | |
1102 | size_t iv_len = 0, icv_len = 0; | |
1103 | ||
1104 | hdr->flag |= RX_FLAG_DECRYPTED | RX_FLAG_IV_STRIPPED; | |
1105 | ||
1106 | /* Oops... There is no fast way to ask mac80211 about | |
8b3e7be4 SP |
1107 | * IV/ICV lengths. Even defineas are not exposed. |
1108 | */ | |
a910e4a9 SP |
1109 | switch (WSM_RX_STATUS_ENCRYPTION(arg->flags)) { |
1110 | case WSM_RX_STATUS_WEP: | |
1111 | iv_len = 4 /* WEP_IV_LEN */; | |
1112 | icv_len = 4 /* WEP_ICV_LEN */; | |
1113 | break; | |
1114 | case WSM_RX_STATUS_TKIP: | |
1115 | iv_len = 8 /* TKIP_IV_LEN */; | |
1116 | icv_len = 4 /* TKIP_ICV_LEN */ | |
1117 | + 8 /*MICHAEL_MIC_LEN*/; | |
1118 | hdr->flag |= RX_FLAG_MMIC_STRIPPED; | |
1119 | break; | |
1120 | case WSM_RX_STATUS_AES: | |
1121 | iv_len = 8 /* CCMP_HDR_LEN */; | |
1122 | icv_len = 8 /* CCMP_MIC_LEN */; | |
1123 | break; | |
1124 | case WSM_RX_STATUS_WAPI: | |
1125 | iv_len = 18 /* WAPI_HDR_LEN */; | |
1126 | icv_len = 16 /* WAPI_MIC_LEN */; | |
1127 | break; | |
1128 | default: | |
1129 | pr_warn("Unknown encryption type %d\n", | |
1130 | WSM_RX_STATUS_ENCRYPTION(arg->flags)); | |
1131 | goto drop; | |
1132 | } | |
1133 | ||
1134 | /* Firmware strips ICV in case of MIC failure. */ | |
1135 | if (arg->status == WSM_STATUS_MICFAILURE) | |
1136 | icv_len = 0; | |
1137 | ||
1138 | if (skb->len < hdrlen + iv_len + icv_len) { | |
1139 | wiphy_warn(priv->hw->wiphy, "Malformed SDU rx'ed. Size is lesser than crypto headers.\n"); | |
1140 | goto drop; | |
1141 | } | |
1142 | ||
1143 | /* Remove IV, ICV and MIC */ | |
1144 | skb_trim(skb, skb->len - icv_len); | |
1145 | memmove(skb->data + iv_len, skb->data, hdrlen); | |
1146 | skb_pull(skb, iv_len); | |
1147 | } | |
1148 | ||
1149 | /* Remove TSF from the end of frame */ | |
1150 | if (arg->flags & WSM_RX_STATUS_TSF_INCLUDED) { | |
1151 | memcpy(&hdr->mactime, skb->data + skb->len - 8, 8); | |
1152 | hdr->mactime = le64_to_cpu(hdr->mactime); | |
1153 | if (skb->len >= 8) | |
1154 | skb_trim(skb, skb->len - 8); | |
8b3e7be4 SP |
1155 | } else { |
1156 | hdr->mactime = 0; | |
a910e4a9 SP |
1157 | } |
1158 | ||
1159 | cw1200_debug_rxed(priv); | |
1160 | if (arg->flags & WSM_RX_STATUS_AGGREGATE) | |
1161 | cw1200_debug_rxed_agg(priv); | |
1162 | ||
1163 | if (ieee80211_is_action(frame->frame_control) && | |
1164 | (arg->flags & WSM_RX_STATUS_ADDRESS1)) { | |
1165 | if (cw1200_handle_action_rx(priv, skb)) | |
1166 | return; | |
1167 | } else if (ieee80211_is_beacon(frame->frame_control) && | |
16ec75b5 | 1168 | !arg->status && priv->vif && |
a910e4a9 SP |
1169 | !memcmp(ieee80211_get_SA(frame), priv->vif->bss_conf.bssid, |
1170 | ETH_ALEN)) { | |
1171 | const u8 *tim_ie; | |
1172 | u8 *ies = ((struct ieee80211_mgmt *) | |
1173 | (skb->data))->u.beacon.variable; | |
1174 | size_t ies_len = skb->len - (ies - (u8 *)(skb->data)); | |
1175 | ||
1176 | tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len); | |
1177 | if (tim_ie) { | |
1178 | struct ieee80211_tim_ie *tim = | |
1179 | (struct ieee80211_tim_ie *)&tim_ie[2]; | |
1180 | ||
1181 | if (priv->join_dtim_period != tim->dtim_period) { | |
1182 | priv->join_dtim_period = tim->dtim_period; | |
1183 | queue_work(priv->workqueue, | |
1184 | &priv->set_beacon_wakeup_period_work); | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | /* Disable beacon filter once we're associated... */ | |
1189 | if (priv->disable_beacon_filter && | |
1190 | (priv->vif->bss_conf.assoc || | |
1191 | priv->vif->bss_conf.ibss_joined)) { | |
1192 | priv->disable_beacon_filter = false; | |
1193 | queue_work(priv->workqueue, | |
1194 | &priv->update_filtering_work); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | /* Stay awake after frame is received to give | |
1199 | * userspace chance to react and acquire appropriate | |
8b3e7be4 SP |
1200 | * wakelock. |
1201 | */ | |
a910e4a9 SP |
1202 | if (ieee80211_is_auth(frame->frame_control)) |
1203 | grace_period = 5 * HZ; | |
1204 | else if (ieee80211_is_deauth(frame->frame_control)) | |
1205 | grace_period = 5 * HZ; | |
1206 | else | |
1207 | grace_period = 1 * HZ; | |
1208 | cw1200_pm_stay_awake(&priv->pm_state, grace_period); | |
1209 | ||
fa8eeae1 | 1210 | if (early_data) { |
a910e4a9 SP |
1211 | spin_lock_bh(&priv->ps_state_lock); |
1212 | /* Double-check status with lock held */ | |
1213 | if (entry->status == CW1200_LINK_SOFT) | |
1214 | skb_queue_tail(&entry->rx_queue, skb); | |
1215 | else | |
1216 | ieee80211_rx_irqsafe(priv->hw, skb); | |
1217 | spin_unlock_bh(&priv->ps_state_lock); | |
1218 | } else { | |
1219 | ieee80211_rx_irqsafe(priv->hw, skb); | |
1220 | } | |
1221 | *skb_p = NULL; | |
1222 | ||
1223 | return; | |
1224 | ||
1225 | drop: | |
1226 | /* TODO: update failure counters */ | |
1227 | return; | |
1228 | } | |
1229 | ||
1230 | /* ******************************************************************** */ | |
1231 | /* Security */ | |
1232 | ||
1233 | int cw1200_alloc_key(struct cw1200_common *priv) | |
1234 | { | |
1235 | int idx; | |
1236 | ||
1237 | idx = ffs(~priv->key_map) - 1; | |
1238 | if (idx < 0 || idx > WSM_KEY_MAX_INDEX) | |
1239 | return -1; | |
1240 | ||
1241 | priv->key_map |= BIT(idx); | |
1242 | priv->keys[idx].index = idx; | |
1243 | return idx; | |
1244 | } | |
1245 | ||
1246 | void cw1200_free_key(struct cw1200_common *priv, int idx) | |
1247 | { | |
1248 | BUG_ON(!(priv->key_map & BIT(idx))); | |
1249 | memset(&priv->keys[idx], 0, sizeof(priv->keys[idx])); | |
1250 | priv->key_map &= ~BIT(idx); | |
1251 | } | |
1252 | ||
1253 | void cw1200_free_keys(struct cw1200_common *priv) | |
1254 | { | |
1255 | memset(&priv->keys, 0, sizeof(priv->keys)); | |
1256 | priv->key_map = 0; | |
1257 | } | |
1258 | ||
1259 | int cw1200_upload_keys(struct cw1200_common *priv) | |
1260 | { | |
1261 | int idx, ret = 0; | |
1262 | for (idx = 0; idx <= WSM_KEY_MAX_INDEX; ++idx) | |
1263 | if (priv->key_map & BIT(idx)) { | |
1264 | ret = wsm_add_key(priv, &priv->keys[idx]); | |
1265 | if (ret < 0) | |
1266 | break; | |
1267 | } | |
1268 | return ret; | |
1269 | } | |
1270 | ||
1271 | /* Workaround for WFD test case 6.1.10 */ | |
1272 | void cw1200_link_id_reset(struct work_struct *work) | |
1273 | { | |
1274 | struct cw1200_common *priv = | |
1275 | container_of(work, struct cw1200_common, linkid_reset_work); | |
1276 | int temp_linkid; | |
1277 | ||
1278 | if (!priv->action_linkid) { | |
1279 | /* In GO mode we can receive ACTION frames without a linkID */ | |
1280 | temp_linkid = cw1200_alloc_link_id(priv, | |
1281 | &priv->action_frame_sa[0]); | |
1282 | WARN_ON(!temp_linkid); | |
1283 | if (temp_linkid) { | |
1284 | /* Make sure we execute the WQ */ | |
1285 | flush_workqueue(priv->workqueue); | |
1286 | /* Release the link ID */ | |
1287 | spin_lock_bh(&priv->ps_state_lock); | |
1288 | priv->link_id_db[temp_linkid - 1].prev_status = | |
1289 | priv->link_id_db[temp_linkid - 1].status; | |
1290 | priv->link_id_db[temp_linkid - 1].status = | |
1291 | CW1200_LINK_RESET; | |
1292 | spin_unlock_bh(&priv->ps_state_lock); | |
1293 | wsm_lock_tx_async(priv); | |
1294 | if (queue_work(priv->workqueue, | |
1295 | &priv->link_id_work) <= 0) | |
1296 | wsm_unlock_tx(priv); | |
1297 | } | |
1298 | } else { | |
1299 | spin_lock_bh(&priv->ps_state_lock); | |
1300 | priv->link_id_db[priv->action_linkid - 1].prev_status = | |
1301 | priv->link_id_db[priv->action_linkid - 1].status; | |
1302 | priv->link_id_db[priv->action_linkid - 1].status = | |
1303 | CW1200_LINK_RESET_REMAP; | |
1304 | spin_unlock_bh(&priv->ps_state_lock); | |
1305 | wsm_lock_tx_async(priv); | |
1306 | if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) | |
1307 | wsm_unlock_tx(priv); | |
1308 | flush_workqueue(priv->workqueue); | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | int cw1200_find_link_id(struct cw1200_common *priv, const u8 *mac) | |
1313 | { | |
1314 | int i, ret = 0; | |
1315 | spin_lock_bh(&priv->ps_state_lock); | |
1316 | for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) { | |
1317 | if (!memcmp(mac, priv->link_id_db[i].mac, ETH_ALEN) && | |
1318 | priv->link_id_db[i].status) { | |
1319 | priv->link_id_db[i].timestamp = jiffies; | |
1320 | ret = i + 1; | |
1321 | break; | |
1322 | } | |
1323 | } | |
1324 | spin_unlock_bh(&priv->ps_state_lock); | |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | int cw1200_alloc_link_id(struct cw1200_common *priv, const u8 *mac) | |
1329 | { | |
1330 | int i, ret = 0; | |
1331 | unsigned long max_inactivity = 0; | |
1332 | unsigned long now = jiffies; | |
1333 | ||
1334 | spin_lock_bh(&priv->ps_state_lock); | |
1335 | for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) { | |
1336 | if (!priv->link_id_db[i].status) { | |
1337 | ret = i + 1; | |
1338 | break; | |
1339 | } else if (priv->link_id_db[i].status != CW1200_LINK_HARD && | |
1340 | !priv->tx_queue_stats.link_map_cache[i + 1]) { | |
1341 | unsigned long inactivity = | |
1342 | now - priv->link_id_db[i].timestamp; | |
1343 | if (inactivity < max_inactivity) | |
1344 | continue; | |
1345 | max_inactivity = inactivity; | |
1346 | ret = i + 1; | |
1347 | } | |
1348 | } | |
1349 | if (ret) { | |
1350 | struct cw1200_link_entry *entry = &priv->link_id_db[ret - 1]; | |
1351 | pr_debug("[AP] STA added, link_id: %d\n", ret); | |
1352 | entry->status = CW1200_LINK_RESERVE; | |
1353 | memcpy(&entry->mac, mac, ETH_ALEN); | |
1354 | memset(&entry->buffered, 0, CW1200_MAX_TID); | |
1355 | skb_queue_head_init(&entry->rx_queue); | |
1356 | wsm_lock_tx_async(priv); | |
1357 | if (queue_work(priv->workqueue, &priv->link_id_work) <= 0) | |
1358 | wsm_unlock_tx(priv); | |
1359 | } else { | |
1360 | wiphy_info(priv->hw->wiphy, | |
1361 | "[AP] Early: no more link IDs available.\n"); | |
1362 | } | |
1363 | ||
1364 | spin_unlock_bh(&priv->ps_state_lock); | |
1365 | return ret; | |
1366 | } | |
1367 | ||
1368 | void cw1200_link_id_work(struct work_struct *work) | |
1369 | { | |
1370 | struct cw1200_common *priv = | |
1371 | container_of(work, struct cw1200_common, link_id_work); | |
1372 | wsm_flush_tx(priv); | |
1373 | cw1200_link_id_gc_work(&priv->link_id_gc_work.work); | |
1374 | wsm_unlock_tx(priv); | |
1375 | } | |
1376 | ||
1377 | void cw1200_link_id_gc_work(struct work_struct *work) | |
1378 | { | |
1379 | struct cw1200_common *priv = | |
1380 | container_of(work, struct cw1200_common, link_id_gc_work.work); | |
1381 | struct wsm_reset reset = { | |
1382 | .reset_statistics = false, | |
1383 | }; | |
1384 | struct wsm_map_link map_link = { | |
1385 | .link_id = 0, | |
1386 | }; | |
1387 | unsigned long now = jiffies; | |
1388 | unsigned long next_gc = -1; | |
1389 | long ttl; | |
1390 | bool need_reset; | |
1391 | u32 mask; | |
1392 | int i; | |
1393 | ||
1394 | if (priv->join_status != CW1200_JOIN_STATUS_AP) | |
1395 | return; | |
1396 | ||
1397 | wsm_lock_tx(priv); | |
1398 | spin_lock_bh(&priv->ps_state_lock); | |
1399 | for (i = 0; i < CW1200_MAX_STA_IN_AP_MODE; ++i) { | |
1400 | need_reset = false; | |
1401 | mask = BIT(i + 1); | |
1402 | if (priv->link_id_db[i].status == CW1200_LINK_RESERVE || | |
1403 | (priv->link_id_db[i].status == CW1200_LINK_HARD && | |
1404 | !(priv->link_id_map & mask))) { | |
1405 | if (priv->link_id_map & mask) { | |
1406 | priv->sta_asleep_mask &= ~mask; | |
1407 | priv->pspoll_mask &= ~mask; | |
1408 | need_reset = true; | |
1409 | } | |
1410 | priv->link_id_map |= mask; | |
1411 | if (priv->link_id_db[i].status != CW1200_LINK_HARD) | |
1412 | priv->link_id_db[i].status = CW1200_LINK_SOFT; | |
1413 | memcpy(map_link.mac_addr, priv->link_id_db[i].mac, | |
1414 | ETH_ALEN); | |
1415 | spin_unlock_bh(&priv->ps_state_lock); | |
1416 | if (need_reset) { | |
1417 | reset.link_id = i + 1; | |
1418 | wsm_reset(priv, &reset); | |
1419 | } | |
1420 | map_link.link_id = i + 1; | |
1421 | wsm_map_link(priv, &map_link); | |
1422 | next_gc = min(next_gc, CW1200_LINK_ID_GC_TIMEOUT); | |
1423 | spin_lock_bh(&priv->ps_state_lock); | |
1424 | } else if (priv->link_id_db[i].status == CW1200_LINK_SOFT) { | |
1425 | ttl = priv->link_id_db[i].timestamp - now + | |
1426 | CW1200_LINK_ID_GC_TIMEOUT; | |
1427 | if (ttl <= 0) { | |
1428 | need_reset = true; | |
1429 | priv->link_id_db[i].status = CW1200_LINK_OFF; | |
1430 | priv->link_id_map &= ~mask; | |
1431 | priv->sta_asleep_mask &= ~mask; | |
1432 | priv->pspoll_mask &= ~mask; | |
1433 | memset(map_link.mac_addr, 0, ETH_ALEN); | |
1434 | spin_unlock_bh(&priv->ps_state_lock); | |
1435 | reset.link_id = i + 1; | |
1436 | wsm_reset(priv, &reset); | |
1437 | spin_lock_bh(&priv->ps_state_lock); | |
1438 | } else { | |
1439 | next_gc = min_t(unsigned long, next_gc, ttl); | |
1440 | } | |
1441 | } else if (priv->link_id_db[i].status == CW1200_LINK_RESET || | |
1442 | priv->link_id_db[i].status == | |
1443 | CW1200_LINK_RESET_REMAP) { | |
1444 | int status = priv->link_id_db[i].status; | |
1445 | priv->link_id_db[i].status = | |
1446 | priv->link_id_db[i].prev_status; | |
1447 | priv->link_id_db[i].timestamp = now; | |
1448 | reset.link_id = i + 1; | |
1449 | spin_unlock_bh(&priv->ps_state_lock); | |
1450 | wsm_reset(priv, &reset); | |
1451 | if (status == CW1200_LINK_RESET_REMAP) { | |
1452 | memcpy(map_link.mac_addr, | |
1453 | priv->link_id_db[i].mac, | |
1454 | ETH_ALEN); | |
1455 | map_link.link_id = i + 1; | |
1456 | wsm_map_link(priv, &map_link); | |
1457 | next_gc = min(next_gc, | |
1458 | CW1200_LINK_ID_GC_TIMEOUT); | |
1459 | } | |
1460 | spin_lock_bh(&priv->ps_state_lock); | |
1461 | } | |
1462 | if (need_reset) { | |
1463 | skb_queue_purge(&priv->link_id_db[i].rx_queue); | |
1464 | pr_debug("[AP] STA removed, link_id: %d\n", | |
1465 | reset.link_id); | |
1466 | } | |
1467 | } | |
1468 | spin_unlock_bh(&priv->ps_state_lock); | |
1469 | if (next_gc != -1) | |
1470 | queue_delayed_work(priv->workqueue, | |
1471 | &priv->link_id_gc_work, next_gc); | |
1472 | wsm_unlock_tx(priv); | |
1473 | } |