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Commit | Line | Data |
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fe8ee9ad CL |
1 | /* |
2 | * Atheros CARL9170 driver | |
3 | * | |
4 | * mac80211 interaction code | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, see | |
21 | * http://www.gnu.org/licenses/. | |
22 | * | |
23 | * This file incorporates work covered by the following copyright and | |
24 | * permission notice: | |
25 | * Copyright (c) 2007-2008 Atheros Communications, Inc. | |
26 | * | |
27 | * Permission to use, copy, modify, and/or distribute this software for any | |
28 | * purpose with or without fee is hereby granted, provided that the above | |
29 | * copyright notice and this permission notice appear in all copies. | |
30 | * | |
31 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
32 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
33 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
34 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
35 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
36 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
37 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
38 | */ | |
39 | ||
fe8ee9ad CL |
40 | #include <linux/slab.h> |
41 | #include <linux/module.h> | |
42 | #include <linux/etherdevice.h> | |
43 | #include <linux/random.h> | |
44 | #include <net/mac80211.h> | |
45 | #include <net/cfg80211.h> | |
46 | #include "hw.h" | |
47 | #include "carl9170.h" | |
48 | #include "cmd.h" | |
49 | ||
eb939922 | 50 | static bool modparam_nohwcrypt; |
2ef00c53 | 51 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444); |
fe8ee9ad CL |
52 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload."); |
53 | ||
54 | int modparam_noht; | |
2ef00c53 | 55 | module_param_named(noht, modparam_noht, int, 0444); |
fe8ee9ad CL |
56 | MODULE_PARM_DESC(noht, "Disable MPDU aggregation."); |
57 | ||
58 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ | |
59 | .bitrate = (_bitrate), \ | |
60 | .flags = (_flags), \ | |
61 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
62 | } | |
63 | ||
64 | struct ieee80211_rate __carl9170_ratetable[] = { | |
65 | RATE(10, 0, 0, 0), | |
66 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
67 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
68 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
69 | RATE(60, 0xb, 0, 0), | |
70 | RATE(90, 0xf, 0, 0), | |
71 | RATE(120, 0xa, 0, 0), | |
72 | RATE(180, 0xe, 0, 0), | |
73 | RATE(240, 0x9, 0, 0), | |
74 | RATE(360, 0xd, 1, 0), | |
75 | RATE(480, 0x8, 2, 0), | |
76 | RATE(540, 0xc, 3, 0), | |
77 | }; | |
78 | #undef RATE | |
79 | ||
80 | #define carl9170_g_ratetable (__carl9170_ratetable + 0) | |
81 | #define carl9170_g_ratetable_size 12 | |
82 | #define carl9170_a_ratetable (__carl9170_ratetable + 4) | |
83 | #define carl9170_a_ratetable_size 8 | |
84 | ||
85 | /* | |
86 | * NB: The hw_value is used as an index into the carl9170_phy_freq_params | |
87 | * array in phy.c so that we don't have to do frequency lookups! | |
88 | */ | |
89 | #define CHAN(_freq, _idx) { \ | |
90 | .center_freq = (_freq), \ | |
91 | .hw_value = (_idx), \ | |
92 | .max_power = 18, /* XXX */ \ | |
93 | } | |
94 | ||
95 | static struct ieee80211_channel carl9170_2ghz_chantable[] = { | |
96 | CHAN(2412, 0), | |
97 | CHAN(2417, 1), | |
98 | CHAN(2422, 2), | |
99 | CHAN(2427, 3), | |
100 | CHAN(2432, 4), | |
101 | CHAN(2437, 5), | |
102 | CHAN(2442, 6), | |
103 | CHAN(2447, 7), | |
104 | CHAN(2452, 8), | |
105 | CHAN(2457, 9), | |
106 | CHAN(2462, 10), | |
107 | CHAN(2467, 11), | |
108 | CHAN(2472, 12), | |
109 | CHAN(2484, 13), | |
110 | }; | |
111 | ||
112 | static struct ieee80211_channel carl9170_5ghz_chantable[] = { | |
113 | CHAN(4920, 14), | |
114 | CHAN(4940, 15), | |
115 | CHAN(4960, 16), | |
116 | CHAN(4980, 17), | |
117 | CHAN(5040, 18), | |
118 | CHAN(5060, 19), | |
119 | CHAN(5080, 20), | |
120 | CHAN(5180, 21), | |
121 | CHAN(5200, 22), | |
122 | CHAN(5220, 23), | |
123 | CHAN(5240, 24), | |
124 | CHAN(5260, 25), | |
125 | CHAN(5280, 26), | |
126 | CHAN(5300, 27), | |
127 | CHAN(5320, 28), | |
128 | CHAN(5500, 29), | |
129 | CHAN(5520, 30), | |
130 | CHAN(5540, 31), | |
131 | CHAN(5560, 32), | |
132 | CHAN(5580, 33), | |
133 | CHAN(5600, 34), | |
134 | CHAN(5620, 35), | |
135 | CHAN(5640, 36), | |
136 | CHAN(5660, 37), | |
137 | CHAN(5680, 38), | |
138 | CHAN(5700, 39), | |
139 | CHAN(5745, 40), | |
140 | CHAN(5765, 41), | |
141 | CHAN(5785, 42), | |
142 | CHAN(5805, 43), | |
143 | CHAN(5825, 44), | |
144 | CHAN(5170, 45), | |
145 | CHAN(5190, 46), | |
146 | CHAN(5210, 47), | |
147 | CHAN(5230, 48), | |
148 | }; | |
149 | #undef CHAN | |
150 | ||
151 | #define CARL9170_HT_CAP \ | |
152 | { \ | |
153 | .ht_supported = true, \ | |
154 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
155 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ | |
156 | IEEE80211_HT_CAP_SGI_40 | \ | |
157 | IEEE80211_HT_CAP_DSSSCCK40 | \ | |
158 | IEEE80211_HT_CAP_SM_PS, \ | |
159 | .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \ | |
160 | .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \ | |
161 | .mcs = { \ | |
162 | .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ | |
163 | .rx_highest = cpu_to_le16(300), \ | |
164 | .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ | |
165 | }, \ | |
166 | } | |
167 | ||
168 | static struct ieee80211_supported_band carl9170_band_2GHz = { | |
169 | .channels = carl9170_2ghz_chantable, | |
170 | .n_channels = ARRAY_SIZE(carl9170_2ghz_chantable), | |
171 | .bitrates = carl9170_g_ratetable, | |
172 | .n_bitrates = carl9170_g_ratetable_size, | |
173 | .ht_cap = CARL9170_HT_CAP, | |
174 | }; | |
175 | ||
176 | static struct ieee80211_supported_band carl9170_band_5GHz = { | |
177 | .channels = carl9170_5ghz_chantable, | |
178 | .n_channels = ARRAY_SIZE(carl9170_5ghz_chantable), | |
179 | .bitrates = carl9170_a_ratetable, | |
180 | .n_bitrates = carl9170_a_ratetable_size, | |
181 | .ht_cap = CARL9170_HT_CAP, | |
182 | }; | |
183 | ||
184 | static void carl9170_ampdu_gc(struct ar9170 *ar) | |
185 | { | |
186 | struct carl9170_sta_tid *tid_info; | |
187 | LIST_HEAD(tid_gc); | |
188 | ||
189 | rcu_read_lock(); | |
190 | list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { | |
191 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
192 | if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) { | |
193 | tid_info->state = CARL9170_TID_STATE_KILLED; | |
194 | list_del_rcu(&tid_info->list); | |
195 | ar->tx_ampdu_list_len--; | |
196 | list_add_tail(&tid_info->tmp_list, &tid_gc); | |
197 | } | |
198 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
199 | ||
200 | } | |
201 | rcu_assign_pointer(ar->tx_ampdu_iter, tid_info); | |
202 | rcu_read_unlock(); | |
203 | ||
204 | synchronize_rcu(); | |
205 | ||
206 | while (!list_empty(&tid_gc)) { | |
207 | struct sk_buff *skb; | |
208 | tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid, | |
209 | tmp_list); | |
210 | ||
211 | while ((skb = __skb_dequeue(&tid_info->queue))) | |
212 | carl9170_tx_status(ar, skb, false); | |
213 | ||
214 | list_del_init(&tid_info->tmp_list); | |
215 | kfree(tid_info); | |
216 | } | |
217 | } | |
218 | ||
219 | static void carl9170_flush(struct ar9170 *ar, bool drop_queued) | |
220 | { | |
221 | if (drop_queued) { | |
222 | int i; | |
223 | ||
224 | /* | |
225 | * We can only drop frames which have not been uploaded | |
226 | * to the device yet. | |
227 | */ | |
228 | ||
229 | for (i = 0; i < ar->hw->queues; i++) { | |
230 | struct sk_buff *skb; | |
231 | ||
cb139ecc CL |
232 | while ((skb = skb_dequeue(&ar->tx_pending[i]))) { |
233 | struct ieee80211_tx_info *info; | |
234 | ||
235 | info = IEEE80211_SKB_CB(skb); | |
236 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
237 | atomic_dec(&ar->tx_ampdu_upload); | |
238 | ||
fe8ee9ad | 239 | carl9170_tx_status(ar, skb, false); |
cb139ecc | 240 | } |
fe8ee9ad CL |
241 | } |
242 | } | |
243 | ||
244 | /* Wait for all other outstanding frames to timeout. */ | |
245 | if (atomic_read(&ar->tx_total_queued)) | |
246 | WARN_ON(wait_for_completion_timeout(&ar->tx_flush, HZ) == 0); | |
247 | } | |
248 | ||
249 | static void carl9170_flush_ba(struct ar9170 *ar) | |
250 | { | |
251 | struct sk_buff_head free; | |
252 | struct carl9170_sta_tid *tid_info; | |
253 | struct sk_buff *skb; | |
254 | ||
255 | __skb_queue_head_init(&free); | |
256 | ||
257 | rcu_read_lock(); | |
258 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
259 | list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { | |
260 | if (tid_info->state > CARL9170_TID_STATE_SUSPEND) { | |
261 | tid_info->state = CARL9170_TID_STATE_SUSPEND; | |
262 | ||
263 | spin_lock(&tid_info->lock); | |
264 | while ((skb = __skb_dequeue(&tid_info->queue))) | |
265 | __skb_queue_tail(&free, skb); | |
266 | spin_unlock(&tid_info->lock); | |
267 | } | |
268 | } | |
269 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
270 | rcu_read_unlock(); | |
271 | ||
272 | while ((skb = __skb_dequeue(&free))) | |
273 | carl9170_tx_status(ar, skb, false); | |
274 | } | |
275 | ||
276 | static void carl9170_zap_queues(struct ar9170 *ar) | |
277 | { | |
278 | struct carl9170_vif_info *cvif; | |
279 | unsigned int i; | |
280 | ||
281 | carl9170_ampdu_gc(ar); | |
282 | ||
283 | carl9170_flush_ba(ar); | |
284 | carl9170_flush(ar, true); | |
285 | ||
286 | for (i = 0; i < ar->hw->queues; i++) { | |
287 | spin_lock_bh(&ar->tx_status[i].lock); | |
288 | while (!skb_queue_empty(&ar->tx_status[i])) { | |
289 | struct sk_buff *skb; | |
290 | ||
291 | skb = skb_peek(&ar->tx_status[i]); | |
292 | carl9170_tx_get_skb(skb); | |
293 | spin_unlock_bh(&ar->tx_status[i].lock); | |
294 | carl9170_tx_drop(ar, skb); | |
295 | spin_lock_bh(&ar->tx_status[i].lock); | |
296 | carl9170_tx_put_skb(skb); | |
297 | } | |
298 | spin_unlock_bh(&ar->tx_status[i].lock); | |
299 | } | |
300 | ||
301 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1); | |
302 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT); | |
303 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS); | |
304 | ||
305 | /* reinitialize queues statistics */ | |
306 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
307 | for (i = 0; i < ar->hw->queues; i++) | |
308 | ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD; | |
309 | ||
310 | for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++) | |
311 | ar->mem_bitmap[i] = 0; | |
312 | ||
313 | rcu_read_lock(); | |
314 | list_for_each_entry_rcu(cvif, &ar->vif_list, list) { | |
315 | spin_lock_bh(&ar->beacon_lock); | |
316 | dev_kfree_skb_any(cvif->beacon); | |
317 | cvif->beacon = NULL; | |
318 | spin_unlock_bh(&ar->beacon_lock); | |
319 | } | |
320 | rcu_read_unlock(); | |
321 | ||
322 | atomic_set(&ar->tx_ampdu_upload, 0); | |
323 | atomic_set(&ar->tx_ampdu_scheduler, 0); | |
324 | atomic_set(&ar->tx_total_pending, 0); | |
325 | atomic_set(&ar->tx_total_queued, 0); | |
326 | atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks); | |
327 | } | |
328 | ||
329 | #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
330 | do { \ | |
331 | queue.aifs = ai_fs; \ | |
332 | queue.cw_min = cwmin; \ | |
333 | queue.cw_max = cwmax; \ | |
334 | queue.txop = _txop; \ | |
335 | } while (0) | |
336 | ||
337 | static int carl9170_op_start(struct ieee80211_hw *hw) | |
338 | { | |
339 | struct ar9170 *ar = hw->priv; | |
340 | int err, i; | |
341 | ||
342 | mutex_lock(&ar->mutex); | |
343 | ||
344 | carl9170_zap_queues(ar); | |
345 | ||
346 | /* reset QoS defaults */ | |
c2a7965f CL |
347 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47); |
348 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94); | |
349 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0); | |
350 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0); | |
351 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0); | |
fe8ee9ad CL |
352 | |
353 | ar->current_factor = ar->current_density = -1; | |
354 | /* "The first key is unique." */ | |
355 | ar->usedkeys = 1; | |
356 | ar->filter_state = 0; | |
357 | ar->ps.last_action = jiffies; | |
358 | ar->ps.last_slept = jiffies; | |
359 | ar->erp_mode = CARL9170_ERP_AUTO; | |
7a5c7307 CL |
360 | |
361 | /* Set "disable hw crypto offload" whenever the module parameter | |
362 | * nohwcrypt is true or if the firmware does not support it. | |
363 | */ | |
364 | ar->disable_offload = modparam_nohwcrypt | | |
365 | ar->fw.disable_offload_fw; | |
366 | ar->rx_software_decryption = ar->disable_offload; | |
fe8ee9ad CL |
367 | |
368 | for (i = 0; i < ar->hw->queues; i++) { | |
369 | ar->queue_stop_timeout[i] = jiffies; | |
370 | ar->max_queue_stop_timeout[i] = 0; | |
371 | } | |
372 | ||
373 | atomic_set(&ar->mem_allocs, 0); | |
374 | ||
375 | err = carl9170_usb_open(ar); | |
376 | if (err) | |
377 | goto out; | |
378 | ||
379 | err = carl9170_init_mac(ar); | |
380 | if (err) | |
381 | goto out; | |
382 | ||
383 | err = carl9170_set_qos(ar); | |
384 | if (err) | |
385 | goto out; | |
386 | ||
5c895691 CL |
387 | if (ar->fw.rx_filter) { |
388 | err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA | | |
389 | CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD); | |
390 | if (err) | |
391 | goto out; | |
392 | } | |
393 | ||
fe8ee9ad CL |
394 | err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, |
395 | AR9170_DMA_TRIGGER_RXQ); | |
396 | if (err) | |
397 | goto out; | |
398 | ||
399 | /* Clear key-cache */ | |
400 | for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) { | |
401 | err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, | |
402 | 0, NULL, 0); | |
403 | if (err) | |
404 | goto out; | |
405 | ||
406 | err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, | |
407 | 1, NULL, 0); | |
408 | if (err) | |
409 | goto out; | |
410 | ||
411 | if (i < AR9170_CAM_MAX_USER) { | |
412 | err = carl9170_disable_key(ar, i); | |
413 | if (err) | |
414 | goto out; | |
415 | } | |
416 | } | |
417 | ||
418 | carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED); | |
419 | ||
acf17712 CL |
420 | ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, |
421 | round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); | |
422 | ||
fe8ee9ad CL |
423 | ieee80211_wake_queues(ar->hw); |
424 | err = 0; | |
425 | ||
426 | out: | |
427 | mutex_unlock(&ar->mutex); | |
428 | return err; | |
429 | } | |
430 | ||
431 | static void carl9170_cancel_worker(struct ar9170 *ar) | |
432 | { | |
acf17712 | 433 | cancel_delayed_work_sync(&ar->stat_work); |
fe8ee9ad CL |
434 | cancel_delayed_work_sync(&ar->tx_janitor); |
435 | #ifdef CONFIG_CARL9170_LEDS | |
436 | cancel_delayed_work_sync(&ar->led_work); | |
437 | #endif /* CONFIG_CARL9170_LEDS */ | |
438 | cancel_work_sync(&ar->ps_work); | |
e4a668c5 | 439 | cancel_work_sync(&ar->ping_work); |
fe8ee9ad CL |
440 | cancel_work_sync(&ar->ampdu_work); |
441 | } | |
442 | ||
443 | static void carl9170_op_stop(struct ieee80211_hw *hw) | |
444 | { | |
445 | struct ar9170 *ar = hw->priv; | |
446 | ||
447 | carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); | |
448 | ||
449 | ieee80211_stop_queues(ar->hw); | |
450 | ||
451 | mutex_lock(&ar->mutex); | |
452 | if (IS_ACCEPTING_CMD(ar)) { | |
2cfa5a04 | 453 | RCU_INIT_POINTER(ar->beacon_iter, NULL); |
fe8ee9ad CL |
454 | |
455 | carl9170_led_set_state(ar, 0); | |
456 | ||
457 | /* stop DMA */ | |
458 | carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0); | |
459 | carl9170_usb_stop(ar); | |
460 | } | |
461 | ||
462 | carl9170_zap_queues(ar); | |
463 | mutex_unlock(&ar->mutex); | |
464 | ||
465 | carl9170_cancel_worker(ar); | |
466 | } | |
467 | ||
468 | static void carl9170_restart_work(struct work_struct *work) | |
469 | { | |
470 | struct ar9170 *ar = container_of(work, struct ar9170, | |
471 | restart_work); | |
5bcbc3fc | 472 | int err = -EIO; |
fe8ee9ad CL |
473 | |
474 | ar->usedkeys = 0; | |
475 | ar->filter_state = 0; | |
476 | carl9170_cancel_worker(ar); | |
477 | ||
478 | mutex_lock(&ar->mutex); | |
5bcbc3fc RW |
479 | if (!ar->force_usb_reset) { |
480 | err = carl9170_usb_restart(ar); | |
481 | if (net_ratelimit()) { | |
482 | if (err) | |
483 | dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err); | |
484 | else | |
485 | dev_info(&ar->udev->dev, "device restarted successfully.\n"); | |
fe8ee9ad CL |
486 | } |
487 | } | |
fe8ee9ad CL |
488 | carl9170_zap_queues(ar); |
489 | mutex_unlock(&ar->mutex); | |
5bcbc3fc RW |
490 | |
491 | if (!err && !ar->force_usb_reset) { | |
fe8ee9ad CL |
492 | ar->restart_counter++; |
493 | atomic_set(&ar->pending_restarts, 0); | |
494 | ||
495 | ieee80211_restart_hw(ar->hw); | |
496 | } else { | |
497 | /* | |
498 | * The reset was unsuccessful and the device seems to | |
499 | * be dead. But there's still one option: a low-level | |
500 | * usb subsystem reset... | |
501 | */ | |
502 | ||
503 | carl9170_usb_reset(ar); | |
504 | } | |
505 | } | |
506 | ||
507 | void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r) | |
508 | { | |
509 | carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); | |
510 | ||
511 | /* | |
512 | * Sometimes, an error can trigger several different reset events. | |
513 | * By ignoring these *surplus* reset events, the device won't be | |
514 | * killed again, right after it has recovered. | |
515 | */ | |
516 | if (atomic_inc_return(&ar->pending_restarts) > 1) { | |
517 | dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r); | |
518 | return; | |
519 | } | |
520 | ||
521 | ieee80211_stop_queues(ar->hw); | |
522 | ||
523 | dev_err(&ar->udev->dev, "restart device (%d)\n", r); | |
524 | ||
525 | if (!WARN_ON(r == CARL9170_RR_NO_REASON) || | |
526 | !WARN_ON(r >= __CARL9170_RR_LAST)) | |
527 | ar->last_reason = r; | |
528 | ||
529 | if (!ar->registered) | |
530 | return; | |
531 | ||
5bcbc3fc RW |
532 | if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset) |
533 | ar->force_usb_reset = true; | |
534 | ||
535 | ieee80211_queue_work(ar->hw, &ar->restart_work); | |
fe8ee9ad CL |
536 | |
537 | /* | |
538 | * At this point, the device instance might have vanished/disabled. | |
539 | * So, don't put any code which access the ar9170 struct | |
540 | * without proper protection. | |
541 | */ | |
542 | } | |
543 | ||
e4a668c5 CL |
544 | static void carl9170_ping_work(struct work_struct *work) |
545 | { | |
546 | struct ar9170 *ar = container_of(work, struct ar9170, ping_work); | |
547 | int err; | |
548 | ||
549 | if (!IS_STARTED(ar)) | |
550 | return; | |
551 | ||
552 | mutex_lock(&ar->mutex); | |
553 | err = carl9170_echo_test(ar, 0xdeadbeef); | |
554 | if (err) | |
555 | carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE); | |
556 | mutex_unlock(&ar->mutex); | |
557 | } | |
558 | ||
fe8ee9ad CL |
559 | static int carl9170_init_interface(struct ar9170 *ar, |
560 | struct ieee80211_vif *vif) | |
561 | { | |
562 | struct ath_common *common = &ar->common; | |
563 | int err; | |
564 | ||
565 | if (!vif) { | |
566 | WARN_ON_ONCE(IS_STARTED(ar)); | |
567 | return 0; | |
568 | } | |
569 | ||
570 | memcpy(common->macaddr, vif->addr, ETH_ALEN); | |
571 | ||
7a5c7307 CL |
572 | /* We have to fall back to software crypto, whenever |
573 | * the user choose to participates in an IBSS. HW | |
574 | * offload for IBSS RSN is not supported by this driver. | |
575 | * | |
576 | * NOTE: If the previous main interface has already | |
577 | * disabled hw crypto offload, we have to keep this | |
578 | * previous disable_offload setting as it was. | |
579 | * Altough ideally, we should notify mac80211 and tell | |
580 | * it to forget about any HW crypto offload for now. | |
581 | */ | |
582 | ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) && | |
583 | (vif->type != NL80211_IFTYPE_AP)); | |
584 | ||
55fa645e CL |
585 | /* While the driver supports HW offload in a single |
586 | * P2P client configuration, it doesn't support HW | |
587 | * offload in the favourit, concurrent P2P GO+CLIENT | |
588 | * configuration. Hence, HW offload will always be | |
589 | * disabled for P2P. | |
590 | */ | |
591 | ar->disable_offload |= vif->p2p; | |
592 | ||
7a5c7307 | 593 | ar->rx_software_decryption = ar->disable_offload; |
fe8ee9ad CL |
594 | |
595 | err = carl9170_set_operating_mode(ar); | |
596 | return err; | |
597 | } | |
598 | ||
599 | static int carl9170_op_add_interface(struct ieee80211_hw *hw, | |
600 | struct ieee80211_vif *vif) | |
601 | { | |
602 | struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; | |
7f878b0d | 603 | struct ieee80211_vif *main_vif, *old_main = NULL; |
fe8ee9ad CL |
604 | struct ar9170 *ar = hw->priv; |
605 | int vif_id = -1, err = 0; | |
606 | ||
607 | mutex_lock(&ar->mutex); | |
608 | rcu_read_lock(); | |
609 | if (vif_priv->active) { | |
610 | /* | |
611 | * Skip the interface structure initialization, | |
612 | * if the vif survived the _restart call. | |
613 | */ | |
614 | vif_id = vif_priv->id; | |
615 | vif_priv->enable_beacon = false; | |
616 | ||
617 | spin_lock_bh(&ar->beacon_lock); | |
618 | dev_kfree_skb_any(vif_priv->beacon); | |
619 | vif_priv->beacon = NULL; | |
620 | spin_unlock_bh(&ar->beacon_lock); | |
621 | ||
622 | goto init; | |
623 | } | |
624 | ||
7f878b0d CL |
625 | /* Because the AR9170 HW's MAC doesn't provide full support for |
626 | * multiple, independent interfaces [of different operation modes]. | |
627 | * We have to select ONE main interface [main mode of HW], but we | |
628 | * can have multiple slaves [AKA: entry in the ACK-table]. | |
629 | * | |
630 | * The first (from HEAD/TOP) interface in the ar->vif_list is | |
631 | * always the main intf. All following intfs in this list | |
632 | * are considered to be slave intfs. | |
633 | */ | |
fe8ee9ad CL |
634 | main_vif = carl9170_get_main_vif(ar); |
635 | ||
636 | if (main_vif) { | |
637 | switch (main_vif->type) { | |
638 | case NL80211_IFTYPE_STATION: | |
639 | if (vif->type == NL80211_IFTYPE_STATION) | |
640 | break; | |
641 | ||
7f878b0d CL |
642 | /* P2P GO [master] use-case |
643 | * Because the P2P GO station is selected dynamically | |
644 | * by all participating peers of a WIFI Direct network, | |
645 | * the driver has be able to change the main interface | |
646 | * operating mode on the fly. | |
647 | */ | |
648 | if (main_vif->p2p && vif->p2p && | |
649 | vif->type == NL80211_IFTYPE_AP) { | |
650 | old_main = main_vif; | |
651 | break; | |
652 | } | |
653 | ||
fe8ee9ad CL |
654 | err = -EBUSY; |
655 | rcu_read_unlock(); | |
656 | ||
657 | goto unlock; | |
658 | ||
da93c26d | 659 | case NL80211_IFTYPE_MESH_POINT: |
fe8ee9ad CL |
660 | case NL80211_IFTYPE_AP: |
661 | if ((vif->type == NL80211_IFTYPE_STATION) || | |
662 | (vif->type == NL80211_IFTYPE_WDS) || | |
da93c26d JL |
663 | (vif->type == NL80211_IFTYPE_AP) || |
664 | (vif->type == NL80211_IFTYPE_MESH_POINT)) | |
fe8ee9ad CL |
665 | break; |
666 | ||
667 | err = -EBUSY; | |
668 | rcu_read_unlock(); | |
669 | goto unlock; | |
670 | ||
671 | default: | |
672 | rcu_read_unlock(); | |
673 | goto unlock; | |
674 | } | |
675 | } | |
676 | ||
677 | vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0); | |
678 | ||
679 | if (vif_id < 0) { | |
680 | rcu_read_unlock(); | |
681 | ||
682 | err = -ENOSPC; | |
683 | goto unlock; | |
684 | } | |
685 | ||
686 | BUG_ON(ar->vif_priv[vif_id].id != vif_id); | |
687 | ||
688 | vif_priv->active = true; | |
689 | vif_priv->id = vif_id; | |
690 | vif_priv->enable_beacon = false; | |
691 | ar->vifs++; | |
7f878b0d CL |
692 | if (old_main) { |
693 | /* We end up in here, if the main interface is being replaced. | |
694 | * Put the new main interface at the HEAD of the list and the | |
695 | * previous inteface will automatically become second in line. | |
696 | */ | |
697 | list_add_rcu(&vif_priv->list, &ar->vif_list); | |
698 | } else { | |
699 | /* Add new inteface. If the list is empty, it will become the | |
700 | * main inteface, otherwise it will be slave. | |
701 | */ | |
702 | list_add_tail_rcu(&vif_priv->list, &ar->vif_list); | |
703 | } | |
fe8ee9ad CL |
704 | rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif); |
705 | ||
706 | init: | |
7f878b0d CL |
707 | main_vif = carl9170_get_main_vif(ar); |
708 | ||
709 | if (main_vif == vif) { | |
fe8ee9ad CL |
710 | rcu_assign_pointer(ar->beacon_iter, vif_priv); |
711 | rcu_read_unlock(); | |
712 | ||
7f878b0d CL |
713 | if (old_main) { |
714 | struct carl9170_vif_info *old_main_priv = | |
715 | (void *) old_main->drv_priv; | |
716 | /* downgrade old main intf to slave intf. | |
717 | * NOTE: We are no longer under rcu_read_lock. | |
718 | * But we are still holding ar->mutex, so the | |
719 | * vif data [id, addr] is safe. | |
720 | */ | |
721 | err = carl9170_mod_virtual_mac(ar, old_main_priv->id, | |
722 | old_main->addr); | |
723 | if (err) | |
724 | goto unlock; | |
725 | } | |
726 | ||
fe8ee9ad CL |
727 | err = carl9170_init_interface(ar, vif); |
728 | if (err) | |
729 | goto unlock; | |
730 | } else { | |
fe8ee9ad | 731 | rcu_read_unlock(); |
dafeac38 | 732 | err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr); |
fe8ee9ad CL |
733 | |
734 | if (err) | |
735 | goto unlock; | |
736 | } | |
737 | ||
aa32452d CL |
738 | if (ar->fw.tx_seq_table) { |
739 | err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4, | |
740 | 0); | |
741 | if (err) | |
742 | goto unlock; | |
743 | } | |
744 | ||
fe8ee9ad | 745 | unlock: |
b397492a | 746 | if (err && (vif_id >= 0)) { |
fe8ee9ad CL |
747 | vif_priv->active = false; |
748 | bitmap_release_region(&ar->vif_bitmap, vif_id, 0); | |
749 | ar->vifs--; | |
2cfa5a04 | 750 | RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL); |
fe8ee9ad CL |
751 | list_del_rcu(&vif_priv->list); |
752 | mutex_unlock(&ar->mutex); | |
753 | synchronize_rcu(); | |
754 | } else { | |
755 | if (ar->vifs > 1) | |
756 | ar->ps.off_override |= PS_OFF_VIF; | |
757 | ||
758 | mutex_unlock(&ar->mutex); | |
759 | } | |
760 | ||
761 | return err; | |
762 | } | |
763 | ||
764 | static void carl9170_op_remove_interface(struct ieee80211_hw *hw, | |
765 | struct ieee80211_vif *vif) | |
766 | { | |
767 | struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; | |
768 | struct ieee80211_vif *main_vif; | |
769 | struct ar9170 *ar = hw->priv; | |
770 | unsigned int id; | |
771 | ||
772 | mutex_lock(&ar->mutex); | |
773 | ||
774 | if (WARN_ON_ONCE(!vif_priv->active)) | |
775 | goto unlock; | |
776 | ||
777 | ar->vifs--; | |
778 | ||
779 | rcu_read_lock(); | |
780 | main_vif = carl9170_get_main_vif(ar); | |
781 | ||
782 | id = vif_priv->id; | |
783 | ||
784 | vif_priv->active = false; | |
785 | WARN_ON(vif_priv->enable_beacon); | |
786 | vif_priv->enable_beacon = false; | |
787 | list_del_rcu(&vif_priv->list); | |
2cfa5a04 | 788 | RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL); |
fe8ee9ad CL |
789 | |
790 | if (vif == main_vif) { | |
791 | rcu_read_unlock(); | |
792 | ||
793 | if (ar->vifs) { | |
794 | WARN_ON(carl9170_init_interface(ar, | |
795 | carl9170_get_main_vif(ar))); | |
796 | } else { | |
797 | carl9170_set_operating_mode(ar); | |
798 | } | |
799 | } else { | |
800 | rcu_read_unlock(); | |
801 | ||
802 | WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL)); | |
803 | } | |
804 | ||
805 | carl9170_update_beacon(ar, false); | |
806 | carl9170_flush_cab(ar, id); | |
807 | ||
808 | spin_lock_bh(&ar->beacon_lock); | |
809 | dev_kfree_skb_any(vif_priv->beacon); | |
810 | vif_priv->beacon = NULL; | |
811 | spin_unlock_bh(&ar->beacon_lock); | |
812 | ||
813 | bitmap_release_region(&ar->vif_bitmap, id, 0); | |
814 | ||
815 | carl9170_set_beacon_timers(ar); | |
816 | ||
817 | if (ar->vifs == 1) | |
818 | ar->ps.off_override &= ~PS_OFF_VIF; | |
819 | ||
820 | unlock: | |
821 | mutex_unlock(&ar->mutex); | |
822 | ||
823 | synchronize_rcu(); | |
824 | } | |
825 | ||
826 | void carl9170_ps_check(struct ar9170 *ar) | |
827 | { | |
828 | ieee80211_queue_work(ar->hw, &ar->ps_work); | |
829 | } | |
830 | ||
831 | /* caller must hold ar->mutex */ | |
832 | static int carl9170_ps_update(struct ar9170 *ar) | |
833 | { | |
834 | bool ps = false; | |
835 | int err = 0; | |
836 | ||
837 | if (!ar->ps.off_override) | |
838 | ps = (ar->hw->conf.flags & IEEE80211_CONF_PS); | |
839 | ||
840 | if (ps != ar->ps.state) { | |
841 | err = carl9170_powersave(ar, ps); | |
842 | if (err) | |
843 | return err; | |
844 | ||
845 | if (ar->ps.state && !ps) { | |
846 | ar->ps.sleep_ms = jiffies_to_msecs(jiffies - | |
847 | ar->ps.last_action); | |
848 | } | |
849 | ||
850 | if (ps) | |
851 | ar->ps.last_slept = jiffies; | |
852 | ||
853 | ar->ps.last_action = jiffies; | |
854 | ar->ps.state = ps; | |
855 | } | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static void carl9170_ps_work(struct work_struct *work) | |
861 | { | |
862 | struct ar9170 *ar = container_of(work, struct ar9170, | |
863 | ps_work); | |
864 | mutex_lock(&ar->mutex); | |
865 | if (IS_STARTED(ar)) | |
866 | WARN_ON_ONCE(carl9170_ps_update(ar) != 0); | |
867 | mutex_unlock(&ar->mutex); | |
868 | } | |
869 | ||
acf17712 CL |
870 | static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise) |
871 | { | |
872 | int err; | |
873 | ||
874 | if (noise) { | |
875 | err = carl9170_get_noisefloor(ar); | |
876 | if (err) | |
877 | return err; | |
878 | } | |
879 | ||
880 | if (ar->fw.hw_counters) { | |
881 | err = carl9170_collect_tally(ar); | |
882 | if (err) | |
883 | return err; | |
884 | } | |
885 | ||
886 | if (flush) | |
887 | memset(&ar->tally, 0, sizeof(ar->tally)); | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | static void carl9170_stat_work(struct work_struct *work) | |
893 | { | |
894 | struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work); | |
895 | int err; | |
896 | ||
897 | mutex_lock(&ar->mutex); | |
898 | err = carl9170_update_survey(ar, false, true); | |
899 | mutex_unlock(&ar->mutex); | |
900 | ||
901 | if (err) | |
902 | return; | |
903 | ||
904 | ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, | |
905 | round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); | |
906 | } | |
fe8ee9ad CL |
907 | |
908 | static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
909 | { | |
910 | struct ar9170 *ar = hw->priv; | |
911 | int err = 0; | |
912 | ||
913 | mutex_lock(&ar->mutex); | |
914 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { | |
915 | /* TODO */ | |
916 | err = 0; | |
917 | } | |
918 | ||
919 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
920 | err = carl9170_ps_update(ar); | |
921 | if (err) | |
922 | goto out; | |
923 | } | |
924 | ||
fe8ee9ad CL |
925 | if (changed & IEEE80211_CONF_CHANGE_SMPS) { |
926 | /* TODO */ | |
927 | err = 0; | |
928 | } | |
929 | ||
930 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
675a0b04 KB |
931 | enum nl80211_channel_type channel_type = |
932 | cfg80211_get_chandef_type(&hw->conf.chandef); | |
933 | ||
fe8ee9ad CL |
934 | /* adjust slot time for 5 GHz */ |
935 | err = carl9170_set_slot_time(ar); | |
936 | if (err) | |
937 | goto out; | |
938 | ||
acf17712 CL |
939 | err = carl9170_update_survey(ar, true, false); |
940 | if (err) | |
941 | goto out; | |
942 | ||
675a0b04 | 943 | err = carl9170_set_channel(ar, hw->conf.chandef.chan, |
655d8e23 | 944 | channel_type); |
fe8ee9ad CL |
945 | if (err) |
946 | goto out; | |
947 | ||
acf17712 CL |
948 | err = carl9170_update_survey(ar, false, true); |
949 | if (err) | |
950 | goto out; | |
951 | ||
fe8ee9ad CL |
952 | err = carl9170_set_dyn_sifs_ack(ar); |
953 | if (err) | |
954 | goto out; | |
955 | ||
956 | err = carl9170_set_rts_cts_rate(ar); | |
957 | if (err) | |
958 | goto out; | |
959 | } | |
960 | ||
67e43de6 | 961 | if (changed & IEEE80211_CONF_CHANGE_POWER) { |
675a0b04 | 962 | err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan); |
67e43de6 CL |
963 | if (err) |
964 | goto out; | |
965 | } | |
966 | ||
fe8ee9ad CL |
967 | out: |
968 | mutex_unlock(&ar->mutex); | |
969 | return err; | |
970 | } | |
971 | ||
972 | static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw, | |
973 | struct netdev_hw_addr_list *mc_list) | |
974 | { | |
975 | struct netdev_hw_addr *ha; | |
976 | u64 mchash; | |
977 | ||
978 | /* always get broadcast frames */ | |
979 | mchash = 1ULL << (0xff >> 2); | |
980 | ||
981 | netdev_hw_addr_list_for_each(ha, mc_list) | |
982 | mchash |= 1ULL << (ha->addr[5] >> 2); | |
983 | ||
984 | return mchash; | |
985 | } | |
986 | ||
987 | static void carl9170_op_configure_filter(struct ieee80211_hw *hw, | |
988 | unsigned int changed_flags, | |
989 | unsigned int *new_flags, | |
990 | u64 multicast) | |
991 | { | |
992 | struct ar9170 *ar = hw->priv; | |
993 | ||
994 | /* mask supported flags */ | |
5c895691 | 995 | *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps; |
fe8ee9ad CL |
996 | |
997 | if (!IS_ACCEPTING_CMD(ar)) | |
998 | return; | |
999 | ||
1000 | mutex_lock(&ar->mutex); | |
1001 | ||
1002 | ar->filter_state = *new_flags; | |
1003 | /* | |
1004 | * We can support more by setting the sniffer bit and | |
1005 | * then checking the error flags, later. | |
1006 | */ | |
1007 | ||
8f7f3b2f | 1008 | if (*new_flags & FIF_ALLMULTI) |
fe8ee9ad CL |
1009 | multicast = ~0ULL; |
1010 | ||
1011 | if (multicast != ar->cur_mc_hash) | |
1012 | WARN_ON(carl9170_update_multicast(ar, multicast)); | |
1013 | ||
df140465 JB |
1014 | if (changed_flags & FIF_OTHER_BSS) { |
1015 | ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS); | |
fe8ee9ad CL |
1016 | |
1017 | WARN_ON(carl9170_set_operating_mode(ar)); | |
1018 | } | |
1019 | ||
5c895691 CL |
1020 | if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) { |
1021 | u32 rx_filter = 0; | |
1022 | ||
c9122c0d CL |
1023 | if (!ar->fw.ba_filter) |
1024 | rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; | |
1025 | ||
5c895691 CL |
1026 | if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))) |
1027 | rx_filter |= CARL9170_RX_FILTER_BAD; | |
1028 | ||
1029 | if (!(*new_flags & FIF_CONTROL)) | |
1030 | rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; | |
1031 | ||
1032 | if (!(*new_flags & FIF_PSPOLL)) | |
1033 | rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL; | |
1034 | ||
df140465 | 1035 | if (!(*new_flags & FIF_OTHER_BSS)) { |
5c895691 CL |
1036 | rx_filter |= CARL9170_RX_FILTER_OTHER_RA; |
1037 | rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL; | |
1038 | } | |
1039 | ||
1040 | WARN_ON(carl9170_rx_filter(ar, rx_filter)); | |
1041 | } | |
1042 | ||
fe8ee9ad CL |
1043 | mutex_unlock(&ar->mutex); |
1044 | } | |
1045 | ||
1046 | ||
1047 | static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
1048 | struct ieee80211_vif *vif, | |
1049 | struct ieee80211_bss_conf *bss_conf, | |
1050 | u32 changed) | |
1051 | { | |
1052 | struct ar9170 *ar = hw->priv; | |
1053 | struct ath_common *common = &ar->common; | |
1054 | int err = 0; | |
1055 | struct carl9170_vif_info *vif_priv; | |
1056 | struct ieee80211_vif *main_vif; | |
1057 | ||
1058 | mutex_lock(&ar->mutex); | |
1059 | vif_priv = (void *) vif->drv_priv; | |
1060 | main_vif = carl9170_get_main_vif(ar); | |
1061 | if (WARN_ON(!main_vif)) | |
1062 | goto out; | |
1063 | ||
1064 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
1065 | struct carl9170_vif_info *iter; | |
1066 | int i = 0; | |
1067 | ||
1068 | vif_priv->enable_beacon = bss_conf->enable_beacon; | |
1069 | rcu_read_lock(); | |
1070 | list_for_each_entry_rcu(iter, &ar->vif_list, list) { | |
1071 | if (iter->active && iter->enable_beacon) | |
1072 | i++; | |
1073 | ||
1074 | } | |
1075 | rcu_read_unlock(); | |
1076 | ||
1077 | ar->beacon_enabled = i; | |
1078 | } | |
1079 | ||
1080 | if (changed & BSS_CHANGED_BEACON) { | |
1081 | err = carl9170_update_beacon(ar, false); | |
1082 | if (err) | |
1083 | goto out; | |
1084 | } | |
1085 | ||
1086 | if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON | | |
1087 | BSS_CHANGED_BEACON_INT)) { | |
1088 | ||
1089 | if (main_vif != vif) { | |
1090 | bss_conf->beacon_int = main_vif->bss_conf.beacon_int; | |
1091 | bss_conf->dtim_period = main_vif->bss_conf.dtim_period; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Therefore a hard limit for the broadcast traffic should | |
1096 | * prevent false alarms. | |
1097 | */ | |
1098 | if (vif->type != NL80211_IFTYPE_STATION && | |
1099 | (bss_conf->beacon_int * bss_conf->dtim_period >= | |
1100 | (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) { | |
1101 | err = -EINVAL; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
1105 | err = carl9170_set_beacon_timers(ar); | |
1106 | if (err) | |
1107 | goto out; | |
1108 | } | |
1109 | ||
1110 | if (changed & BSS_CHANGED_HT) { | |
1111 | /* TODO */ | |
1112 | err = 0; | |
1113 | if (err) | |
1114 | goto out; | |
1115 | } | |
1116 | ||
1117 | if (main_vif != vif) | |
1118 | goto out; | |
1119 | ||
1120 | /* | |
1121 | * The following settings can only be changed by the | |
1122 | * master interface. | |
1123 | */ | |
1124 | ||
1125 | if (changed & BSS_CHANGED_BSSID) { | |
1126 | memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); | |
1127 | err = carl9170_set_operating_mode(ar); | |
1128 | if (err) | |
1129 | goto out; | |
1130 | } | |
1131 | ||
1132 | if (changed & BSS_CHANGED_ASSOC) { | |
1133 | ar->common.curaid = bss_conf->aid; | |
1134 | err = carl9170_set_beacon_timers(ar); | |
1135 | if (err) | |
1136 | goto out; | |
1137 | } | |
1138 | ||
1139 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
1140 | err = carl9170_set_slot_time(ar); | |
1141 | if (err) | |
1142 | goto out; | |
1143 | } | |
1144 | ||
1145 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
1146 | err = carl9170_set_mac_rates(ar); | |
1147 | if (err) | |
1148 | goto out; | |
1149 | } | |
1150 | ||
1151 | out: | |
1152 | WARN_ON_ONCE(err && IS_STARTED(ar)); | |
1153 | mutex_unlock(&ar->mutex); | |
1154 | } | |
1155 | ||
37a41b4a EP |
1156 | static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw, |
1157 | struct ieee80211_vif *vif) | |
fe8ee9ad CL |
1158 | { |
1159 | struct ar9170 *ar = hw->priv; | |
1160 | struct carl9170_tsf_rsp tsf; | |
1161 | int err; | |
1162 | ||
1163 | mutex_lock(&ar->mutex); | |
1164 | err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF, | |
1165 | 0, NULL, sizeof(tsf), &tsf); | |
1166 | mutex_unlock(&ar->mutex); | |
1167 | if (WARN_ON(err)) | |
1168 | return 0; | |
1169 | ||
1170 | return le64_to_cpu(tsf.tsf_64); | |
1171 | } | |
1172 | ||
1173 | static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1174 | struct ieee80211_vif *vif, | |
1175 | struct ieee80211_sta *sta, | |
1176 | struct ieee80211_key_conf *key) | |
1177 | { | |
1178 | struct ar9170 *ar = hw->priv; | |
1179 | int err = 0, i; | |
1180 | u8 ktype; | |
1181 | ||
1182 | if (ar->disable_offload || !vif) | |
1183 | return -EOPNOTSUPP; | |
1184 | ||
7a5c7307 | 1185 | /* Fall back to software encryption whenever the driver is connected |
fe8ee9ad CL |
1186 | * to more than one network. |
1187 | * | |
1188 | * This is very unfortunate, because some machines cannot handle | |
1189 | * the high througput speed in 802.11n networks. | |
1190 | */ | |
1191 | ||
66cb54bd AK |
1192 | if (!is_main_vif(ar, vif)) { |
1193 | mutex_lock(&ar->mutex); | |
fe8ee9ad | 1194 | goto err_softw; |
66cb54bd | 1195 | } |
fe8ee9ad CL |
1196 | |
1197 | /* | |
1198 | * While the hardware supports *catch-all* key, for offloading | |
1199 | * group-key en-/de-cryption. The way of how the hardware | |
1200 | * decides which keyId maps to which key, remains a mystery... | |
1201 | */ | |
1202 | if ((vif->type != NL80211_IFTYPE_STATION && | |
1203 | vif->type != NL80211_IFTYPE_ADHOC) && | |
1204 | !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1205 | return -EOPNOTSUPP; | |
1206 | ||
1207 | switch (key->cipher) { | |
1208 | case WLAN_CIPHER_SUITE_WEP40: | |
1209 | ktype = AR9170_ENC_ALG_WEP64; | |
1210 | break; | |
1211 | case WLAN_CIPHER_SUITE_WEP104: | |
1212 | ktype = AR9170_ENC_ALG_WEP128; | |
1213 | break; | |
1214 | case WLAN_CIPHER_SUITE_TKIP: | |
1215 | ktype = AR9170_ENC_ALG_TKIP; | |
1216 | break; | |
1217 | case WLAN_CIPHER_SUITE_CCMP: | |
1218 | ktype = AR9170_ENC_ALG_AESCCMP; | |
e37b6741 | 1219 | key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; |
fe8ee9ad CL |
1220 | break; |
1221 | default: | |
1222 | return -EOPNOTSUPP; | |
1223 | } | |
1224 | ||
1225 | mutex_lock(&ar->mutex); | |
1226 | if (cmd == SET_KEY) { | |
1227 | if (!IS_STARTED(ar)) { | |
1228 | err = -EOPNOTSUPP; | |
1229 | goto out; | |
1230 | } | |
1231 | ||
1232 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { | |
1233 | sta = NULL; | |
1234 | ||
1235 | i = 64 + key->keyidx; | |
1236 | } else { | |
1237 | for (i = 0; i < 64; i++) | |
1238 | if (!(ar->usedkeys & BIT(i))) | |
1239 | break; | |
1240 | if (i == 64) | |
1241 | goto err_softw; | |
1242 | } | |
1243 | ||
1244 | key->hw_key_idx = i; | |
1245 | ||
1246 | err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
1247 | ktype, 0, key->key, | |
1248 | min_t(u8, 16, key->keylen)); | |
1249 | if (err) | |
1250 | goto out; | |
1251 | ||
1252 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
1253 | err = carl9170_upload_key(ar, i, sta ? sta->addr : | |
1254 | NULL, ktype, 1, | |
1255 | key->key + 16, 16); | |
1256 | if (err) | |
1257 | goto out; | |
1258 | ||
1259 | /* | |
1260 | * hardware is not capable generating MMIC | |
1261 | * of fragmented frames! | |
1262 | */ | |
1263 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1264 | } | |
1265 | ||
1266 | if (i < 64) | |
1267 | ar->usedkeys |= BIT(i); | |
1268 | ||
1269 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1270 | } else { | |
1271 | if (!IS_STARTED(ar)) { | |
1272 | /* The device is gone... together with the key ;-) */ | |
1273 | err = 0; | |
1274 | goto out; | |
1275 | } | |
1276 | ||
1277 | if (key->hw_key_idx < 64) { | |
1278 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1279 | } else { | |
1280 | err = carl9170_upload_key(ar, key->hw_key_idx, NULL, | |
1281 | AR9170_ENC_ALG_NONE, 0, | |
1282 | NULL, 0); | |
1283 | if (err) | |
1284 | goto out; | |
1285 | ||
1286 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
1287 | err = carl9170_upload_key(ar, key->hw_key_idx, | |
1288 | NULL, | |
1289 | AR9170_ENC_ALG_NONE, | |
1290 | 1, NULL, 0); | |
1291 | if (err) | |
1292 | goto out; | |
1293 | } | |
1294 | ||
1295 | } | |
1296 | ||
1297 | err = carl9170_disable_key(ar, key->hw_key_idx); | |
1298 | if (err) | |
1299 | goto out; | |
1300 | } | |
1301 | ||
1302 | out: | |
1303 | mutex_unlock(&ar->mutex); | |
1304 | return err; | |
1305 | ||
1306 | err_softw: | |
1307 | if (!ar->rx_software_decryption) { | |
1308 | ar->rx_software_decryption = true; | |
1309 | carl9170_set_operating_mode(ar); | |
1310 | } | |
1311 | mutex_unlock(&ar->mutex); | |
1312 | return -ENOSPC; | |
1313 | } | |
1314 | ||
1315 | static int carl9170_op_sta_add(struct ieee80211_hw *hw, | |
1316 | struct ieee80211_vif *vif, | |
1317 | struct ieee80211_sta *sta) | |
1318 | { | |
1319 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1320 | unsigned int i; | |
1321 | ||
caf1eae2 CL |
1322 | atomic_set(&sta_info->pending_frames, 0); |
1323 | ||
fe8ee9ad CL |
1324 | if (sta->ht_cap.ht_supported) { |
1325 | if (sta->ht_cap.ampdu_density > 6) { | |
1326 | /* | |
1327 | * HW does support 16us AMPDU density. | |
1328 | * No HT-Xmit for station. | |
1329 | */ | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
558925f3 | 1334 | for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) |
2cfa5a04 | 1335 | RCU_INIT_POINTER(sta_info->agg[i], NULL); |
fe8ee9ad CL |
1336 | |
1337 | sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); | |
1338 | sta_info->ht_sta = true; | |
1339 | } | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | static int carl9170_op_sta_remove(struct ieee80211_hw *hw, | |
1345 | struct ieee80211_vif *vif, | |
1346 | struct ieee80211_sta *sta) | |
1347 | { | |
1348 | struct ar9170 *ar = hw->priv; | |
1349 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1350 | unsigned int i; | |
1351 | bool cleanup = false; | |
1352 | ||
1353 | if (sta->ht_cap.ht_supported) { | |
1354 | ||
1355 | sta_info->ht_sta = false; | |
1356 | ||
1357 | rcu_read_lock(); | |
558925f3 | 1358 | for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) { |
fe8ee9ad CL |
1359 | struct carl9170_sta_tid *tid_info; |
1360 | ||
1361 | tid_info = rcu_dereference(sta_info->agg[i]); | |
2cfa5a04 | 1362 | RCU_INIT_POINTER(sta_info->agg[i], NULL); |
fe8ee9ad CL |
1363 | |
1364 | if (!tid_info) | |
1365 | continue; | |
1366 | ||
1367 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1368 | if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) | |
1369 | tid_info->state = CARL9170_TID_STATE_SHUTDOWN; | |
1370 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
1371 | cleanup = true; | |
1372 | } | |
1373 | rcu_read_unlock(); | |
1374 | ||
1375 | if (cleanup) | |
1376 | carl9170_ampdu_gc(ar); | |
1377 | } | |
1378 | ||
1379 | return 0; | |
1380 | } | |
1381 | ||
8a3a3c85 EP |
1382 | static int carl9170_op_conf_tx(struct ieee80211_hw *hw, |
1383 | struct ieee80211_vif *vif, u16 queue, | |
fe8ee9ad CL |
1384 | const struct ieee80211_tx_queue_params *param) |
1385 | { | |
1386 | struct ar9170 *ar = hw->priv; | |
1387 | int ret; | |
1388 | ||
1389 | mutex_lock(&ar->mutex); | |
4ba64126 CL |
1390 | memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param)); |
1391 | ret = carl9170_set_qos(ar); | |
fe8ee9ad CL |
1392 | mutex_unlock(&ar->mutex); |
1393 | return ret; | |
1394 | } | |
1395 | ||
1396 | static void carl9170_ampdu_work(struct work_struct *work) | |
1397 | { | |
1398 | struct ar9170 *ar = container_of(work, struct ar9170, | |
1399 | ampdu_work); | |
1400 | ||
1401 | if (!IS_STARTED(ar)) | |
1402 | return; | |
1403 | ||
1404 | mutex_lock(&ar->mutex); | |
1405 | carl9170_ampdu_gc(ar); | |
1406 | mutex_unlock(&ar->mutex); | |
1407 | } | |
1408 | ||
1409 | static int carl9170_op_ampdu_action(struct ieee80211_hw *hw, | |
1410 | struct ieee80211_vif *vif, | |
50ea05ef | 1411 | struct ieee80211_ampdu_params *params) |
fe8ee9ad | 1412 | { |
50ea05ef SS |
1413 | struct ieee80211_sta *sta = params->sta; |
1414 | enum ieee80211_ampdu_mlme_action action = params->action; | |
1415 | u16 tid = params->tid; | |
1416 | u16 *ssn = ¶ms->ssn; | |
fe8ee9ad CL |
1417 | struct ar9170 *ar = hw->priv; |
1418 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1419 | struct carl9170_sta_tid *tid_info; | |
1420 | ||
1421 | if (modparam_noht) | |
1422 | return -EOPNOTSUPP; | |
1423 | ||
1424 | switch (action) { | |
1425 | case IEEE80211_AMPDU_TX_START: | |
9c655c8b | 1426 | if (!sta_info->ht_sta) |
fe8ee9ad CL |
1427 | return -EOPNOTSUPP; |
1428 | ||
fe8ee9ad CL |
1429 | tid_info = kzalloc(sizeof(struct carl9170_sta_tid), |
1430 | GFP_ATOMIC); | |
69e2a771 | 1431 | if (!tid_info) |
fe8ee9ad | 1432 | return -ENOMEM; |
fe8ee9ad CL |
1433 | |
1434 | tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn); | |
1435 | tid_info->state = CARL9170_TID_STATE_PROGRESS; | |
1436 | tid_info->tid = tid; | |
1437 | tid_info->max = sta_info->ampdu_max_len; | |
9ad86ed3 CL |
1438 | tid_info->sta = sta; |
1439 | tid_info->vif = vif; | |
fe8ee9ad CL |
1440 | |
1441 | INIT_LIST_HEAD(&tid_info->list); | |
1442 | INIT_LIST_HEAD(&tid_info->tmp_list); | |
1443 | skb_queue_head_init(&tid_info->queue); | |
1444 | spin_lock_init(&tid_info->lock); | |
1445 | ||
1446 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1447 | ar->tx_ampdu_list_len++; | |
1448 | list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list); | |
1449 | rcu_assign_pointer(sta_info->agg[tid], tid_info); | |
1450 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
fe8ee9ad | 1451 | |
2ce113de | 1452 | return IEEE80211_AMPDU_TX_START_IMMEDIATE; |
fe8ee9ad | 1453 | |
18b559d5 JB |
1454 | case IEEE80211_AMPDU_TX_STOP_CONT: |
1455 | case IEEE80211_AMPDU_TX_STOP_FLUSH: | |
1456 | case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: | |
fe8ee9ad CL |
1457 | rcu_read_lock(); |
1458 | tid_info = rcu_dereference(sta_info->agg[tid]); | |
1459 | if (tid_info) { | |
1460 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1461 | if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) | |
1462 | tid_info->state = CARL9170_TID_STATE_SHUTDOWN; | |
1463 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
1464 | } | |
1465 | ||
2cfa5a04 | 1466 | RCU_INIT_POINTER(sta_info->agg[tid], NULL); |
fe8ee9ad CL |
1467 | rcu_read_unlock(); |
1468 | ||
1469 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1470 | ieee80211_queue_work(ar->hw, &ar->ampdu_work); | |
1471 | break; | |
1472 | ||
1473 | case IEEE80211_AMPDU_TX_OPERATIONAL: | |
1474 | rcu_read_lock(); | |
1475 | tid_info = rcu_dereference(sta_info->agg[tid]); | |
1476 | ||
1477 | sta_info->stats[tid].clear = true; | |
24047e2c | 1478 | sta_info->stats[tid].req = false; |
fe8ee9ad CL |
1479 | |
1480 | if (tid_info) { | |
1481 | bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE); | |
1482 | tid_info->state = CARL9170_TID_STATE_IDLE; | |
1483 | } | |
1484 | rcu_read_unlock(); | |
1485 | ||
1486 | if (WARN_ON_ONCE(!tid_info)) | |
1487 | return -EFAULT; | |
1488 | ||
1489 | break; | |
1490 | ||
1491 | case IEEE80211_AMPDU_RX_START: | |
1492 | case IEEE80211_AMPDU_RX_STOP: | |
1493 | /* Handled by hardware */ | |
1494 | break; | |
1495 | ||
1496 | default: | |
1497 | return -EOPNOTSUPP; | |
1498 | } | |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | #ifdef CONFIG_CARL9170_WPC | |
1504 | static int carl9170_register_wps_button(struct ar9170 *ar) | |
1505 | { | |
1506 | struct input_dev *input; | |
1507 | int err; | |
1508 | ||
1509 | if (!(ar->features & CARL9170_WPS_BUTTON)) | |
1510 | return 0; | |
1511 | ||
1512 | input = input_allocate_device(); | |
1513 | if (!input) | |
1514 | return -ENOMEM; | |
1515 | ||
1516 | snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button", | |
1517 | wiphy_name(ar->hw->wiphy)); | |
1518 | ||
1519 | snprintf(ar->wps.phys, sizeof(ar->wps.phys), | |
1520 | "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy)); | |
1521 | ||
1522 | input->name = ar->wps.name; | |
1523 | input->phys = ar->wps.phys; | |
1524 | input->id.bustype = BUS_USB; | |
1525 | input->dev.parent = &ar->hw->wiphy->dev; | |
1526 | ||
1527 | input_set_capability(input, EV_KEY, KEY_WPS_BUTTON); | |
1528 | ||
1529 | err = input_register_device(input); | |
1530 | if (err) { | |
1531 | input_free_device(input); | |
1532 | return err; | |
1533 | } | |
1534 | ||
1535 | ar->wps.pbc = input; | |
1536 | return 0; | |
1537 | } | |
1538 | #endif /* CONFIG_CARL9170_WPC */ | |
1539 | ||
00044f17 CL |
1540 | #ifdef CONFIG_CARL9170_HWRNG |
1541 | static int carl9170_rng_get(struct ar9170 *ar) | |
1542 | { | |
1543 | ||
1544 | #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32)) | |
1545 | #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN) | |
1546 | ||
1547 | static const __le32 rng_load[RW] = { | |
1548 | [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)}; | |
1549 | ||
1550 | u32 buf[RW]; | |
1551 | ||
1552 | unsigned int i, off = 0, transfer, count; | |
1553 | int err; | |
1554 | ||
1555 | BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN); | |
1556 | ||
1557 | if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized) | |
1558 | return -EAGAIN; | |
1559 | ||
1560 | count = ARRAY_SIZE(ar->rng.cache); | |
1561 | while (count) { | |
1562 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, | |
1563 | RB, (u8 *) rng_load, | |
1564 | RB, (u8 *) buf); | |
1565 | if (err) | |
1566 | return err; | |
1567 | ||
1568 | transfer = min_t(unsigned int, count, RW); | |
1569 | for (i = 0; i < transfer; i++) | |
1570 | ar->rng.cache[off + i] = buf[i]; | |
1571 | ||
1572 | off += transfer; | |
1573 | count -= transfer; | |
1574 | } | |
1575 | ||
1576 | ar->rng.cache_idx = 0; | |
1577 | ||
1578 | #undef RW | |
1579 | #undef RB | |
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | static int carl9170_rng_read(struct hwrng *rng, u32 *data) | |
1584 | { | |
1585 | struct ar9170 *ar = (struct ar9170 *)rng->priv; | |
1586 | int ret = -EIO; | |
1587 | ||
1588 | mutex_lock(&ar->mutex); | |
1589 | if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) { | |
1590 | ret = carl9170_rng_get(ar); | |
1591 | if (ret) { | |
1592 | mutex_unlock(&ar->mutex); | |
1593 | return ret; | |
1594 | } | |
1595 | } | |
1596 | ||
1597 | *data = ar->rng.cache[ar->rng.cache_idx++]; | |
1598 | mutex_unlock(&ar->mutex); | |
1599 | ||
1600 | return sizeof(u16); | |
1601 | } | |
1602 | ||
1603 | static void carl9170_unregister_hwrng(struct ar9170 *ar) | |
1604 | { | |
1605 | if (ar->rng.initialized) { | |
1606 | hwrng_unregister(&ar->rng.rng); | |
1607 | ar->rng.initialized = false; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | static int carl9170_register_hwrng(struct ar9170 *ar) | |
1612 | { | |
1613 | int err; | |
1614 | ||
1615 | snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name), | |
1616 | "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy)); | |
1617 | ar->rng.rng.name = ar->rng.name; | |
1618 | ar->rng.rng.data_read = carl9170_rng_read; | |
1619 | ar->rng.rng.priv = (unsigned long)ar; | |
1620 | ||
1621 | if (WARN_ON(ar->rng.initialized)) | |
1622 | return -EALREADY; | |
1623 | ||
1624 | err = hwrng_register(&ar->rng.rng); | |
1625 | if (err) { | |
1626 | dev_err(&ar->udev->dev, "Failed to register the random " | |
1627 | "number generator (%d)\n", err); | |
1628 | return err; | |
1629 | } | |
1630 | ||
1631 | ar->rng.initialized = true; | |
1632 | ||
1633 | err = carl9170_rng_get(ar); | |
1634 | if (err) { | |
1635 | carl9170_unregister_hwrng(ar); | |
1636 | return err; | |
1637 | } | |
1638 | ||
1639 | return 0; | |
1640 | } | |
1641 | #endif /* CONFIG_CARL9170_HWRNG */ | |
1642 | ||
fe8ee9ad CL |
1643 | static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, |
1644 | struct survey_info *survey) | |
1645 | { | |
1646 | struct ar9170 *ar = hw->priv; | |
acf17712 CL |
1647 | struct ieee80211_channel *chan; |
1648 | struct ieee80211_supported_band *band; | |
1649 | int err, b, i; | |
fe8ee9ad | 1650 | |
acf17712 CL |
1651 | chan = ar->channel; |
1652 | if (!chan) | |
1653 | return -ENODEV; | |
fe8ee9ad | 1654 | |
acf17712 CL |
1655 | if (idx == chan->hw_value) { |
1656 | mutex_lock(&ar->mutex); | |
1657 | err = carl9170_update_survey(ar, false, true); | |
1658 | mutex_unlock(&ar->mutex); | |
1659 | if (err) | |
1660 | return err; | |
1661 | } | |
fe8ee9ad | 1662 | |
57fbcce3 | 1663 | for (b = 0; b < NUM_NL80211_BANDS; b++) { |
acf17712 CL |
1664 | band = ar->hw->wiphy->bands[b]; |
1665 | ||
1666 | if (!band) | |
1667 | continue; | |
1668 | ||
1669 | for (i = 0; i < band->n_channels; i++) { | |
1670 | if (band->channels[i].hw_value == idx) { | |
1671 | chan = &band->channels[i]; | |
1672 | goto found; | |
1673 | } | |
1674 | } | |
1675 | } | |
1676 | return -ENOENT; | |
1677 | ||
1678 | found: | |
1679 | memcpy(survey, &ar->survey[idx], sizeof(*survey)); | |
1680 | ||
1681 | survey->channel = chan; | |
fe8ee9ad | 1682 | survey->filled = SURVEY_INFO_NOISE_DBM; |
acf17712 CL |
1683 | |
1684 | if (ar->channel == chan) | |
1685 | survey->filled |= SURVEY_INFO_IN_USE; | |
1686 | ||
1687 | if (ar->fw.hw_counters) { | |
4ed20beb JB |
1688 | survey->filled |= SURVEY_INFO_TIME | |
1689 | SURVEY_INFO_TIME_BUSY | | |
1690 | SURVEY_INFO_TIME_TX; | |
acf17712 CL |
1691 | } |
1692 | ||
fe8ee9ad CL |
1693 | return 0; |
1694 | } | |
1695 | ||
77be2c54 EG |
1696 | static void carl9170_op_flush(struct ieee80211_hw *hw, |
1697 | struct ieee80211_vif *vif, | |
1698 | u32 queues, bool drop) | |
fe8ee9ad CL |
1699 | { |
1700 | struct ar9170 *ar = hw->priv; | |
1701 | unsigned int vid; | |
1702 | ||
1703 | mutex_lock(&ar->mutex); | |
1704 | for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num) | |
1705 | carl9170_flush_cab(ar, vid); | |
1706 | ||
1707 | carl9170_flush(ar, drop); | |
1708 | mutex_unlock(&ar->mutex); | |
1709 | } | |
1710 | ||
1711 | static int carl9170_op_get_stats(struct ieee80211_hw *hw, | |
1712 | struct ieee80211_low_level_stats *stats) | |
1713 | { | |
1714 | struct ar9170 *ar = hw->priv; | |
1715 | ||
1716 | memset(stats, 0, sizeof(*stats)); | |
1717 | stats->dot11ACKFailureCount = ar->tx_ack_failures; | |
1718 | stats->dot11FCSErrorCount = ar->tx_fcs_errors; | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | static void carl9170_op_sta_notify(struct ieee80211_hw *hw, | |
1723 | struct ieee80211_vif *vif, | |
1724 | enum sta_notify_cmd cmd, | |
1725 | struct ieee80211_sta *sta) | |
1726 | { | |
fe8ee9ad | 1727 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
fe8ee9ad CL |
1728 | |
1729 | switch (cmd) { | |
1730 | case STA_NOTIFY_SLEEP: | |
caf1eae2 CL |
1731 | sta_info->sleeping = true; |
1732 | if (atomic_read(&sta_info->pending_frames)) | |
1733 | ieee80211_sta_block_awake(hw, sta, true); | |
fe8ee9ad CL |
1734 | break; |
1735 | ||
1736 | case STA_NOTIFY_AWAKE: | |
caf1eae2 | 1737 | sta_info->sleeping = false; |
fe8ee9ad CL |
1738 | break; |
1739 | } | |
1740 | } | |
1741 | ||
69f7235f CL |
1742 | static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw) |
1743 | { | |
1744 | struct ar9170 *ar = hw->priv; | |
1745 | ||
1746 | return !!atomic_read(&ar->tx_total_queued); | |
1747 | } | |
1748 | ||
fe8ee9ad CL |
1749 | static const struct ieee80211_ops carl9170_ops = { |
1750 | .start = carl9170_op_start, | |
1751 | .stop = carl9170_op_stop, | |
1752 | .tx = carl9170_op_tx, | |
1753 | .flush = carl9170_op_flush, | |
1754 | .add_interface = carl9170_op_add_interface, | |
1755 | .remove_interface = carl9170_op_remove_interface, | |
1756 | .config = carl9170_op_config, | |
1757 | .prepare_multicast = carl9170_op_prepare_multicast, | |
1758 | .configure_filter = carl9170_op_configure_filter, | |
1759 | .conf_tx = carl9170_op_conf_tx, | |
1760 | .bss_info_changed = carl9170_op_bss_info_changed, | |
1761 | .get_tsf = carl9170_op_get_tsf, | |
1762 | .set_key = carl9170_op_set_key, | |
1763 | .sta_add = carl9170_op_sta_add, | |
1764 | .sta_remove = carl9170_op_sta_remove, | |
1765 | .sta_notify = carl9170_op_sta_notify, | |
1766 | .get_survey = carl9170_op_get_survey, | |
1767 | .get_stats = carl9170_op_get_stats, | |
1768 | .ampdu_action = carl9170_op_ampdu_action, | |
69f7235f | 1769 | .tx_frames_pending = carl9170_tx_frames_pending, |
fe8ee9ad CL |
1770 | }; |
1771 | ||
1772 | void *carl9170_alloc(size_t priv_size) | |
1773 | { | |
1774 | struct ieee80211_hw *hw; | |
1775 | struct ar9170 *ar; | |
1776 | struct sk_buff *skb; | |
1777 | int i; | |
1778 | ||
1779 | /* | |
1780 | * this buffer is used for rx stream reconstruction. | |
1781 | * Under heavy load this device (or the transport layer?) | |
1782 | * tends to split the streams into separate rx descriptors. | |
1783 | */ | |
1784 | ||
1785 | skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); | |
1786 | if (!skb) | |
1787 | goto err_nomem; | |
1788 | ||
1789 | hw = ieee80211_alloc_hw(priv_size, &carl9170_ops); | |
1790 | if (!hw) | |
1791 | goto err_nomem; | |
1792 | ||
1793 | ar = hw->priv; | |
1794 | ar->hw = hw; | |
1795 | ar->rx_failover = skb; | |
1796 | ||
1797 | memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head)); | |
1798 | ar->rx_has_plcp = false; | |
1799 | ||
1800 | /* | |
1801 | * Here's a hidden pitfall! | |
1802 | * | |
1803 | * All 4 AC queues work perfectly well under _legacy_ operation. | |
1804 | * However as soon as aggregation is enabled, the traffic flow | |
1805 | * gets very bumpy. Therefore we have to _switch_ to a | |
1806 | * software AC with a single HW queue. | |
1807 | */ | |
1808 | hw->queues = __AR9170_NUM_TXQ; | |
1809 | ||
1810 | mutex_init(&ar->mutex); | |
1811 | spin_lock_init(&ar->beacon_lock); | |
1812 | spin_lock_init(&ar->cmd_lock); | |
1813 | spin_lock_init(&ar->tx_stats_lock); | |
1814 | spin_lock_init(&ar->tx_ampdu_list_lock); | |
1815 | spin_lock_init(&ar->mem_lock); | |
1816 | spin_lock_init(&ar->state_lock); | |
1817 | atomic_set(&ar->pending_restarts, 0); | |
1818 | ar->vifs = 0; | |
1819 | for (i = 0; i < ar->hw->queues; i++) { | |
1820 | skb_queue_head_init(&ar->tx_status[i]); | |
1821 | skb_queue_head_init(&ar->tx_pending[i]); | |
c9122c0d CL |
1822 | |
1823 | INIT_LIST_HEAD(&ar->bar_list[i]); | |
1824 | spin_lock_init(&ar->bar_list_lock[i]); | |
fe8ee9ad CL |
1825 | } |
1826 | INIT_WORK(&ar->ps_work, carl9170_ps_work); | |
e4a668c5 | 1827 | INIT_WORK(&ar->ping_work, carl9170_ping_work); |
fe8ee9ad CL |
1828 | INIT_WORK(&ar->restart_work, carl9170_restart_work); |
1829 | INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work); | |
acf17712 | 1830 | INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work); |
fe8ee9ad CL |
1831 | INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor); |
1832 | INIT_LIST_HEAD(&ar->tx_ampdu_list); | |
1833 | rcu_assign_pointer(ar->tx_ampdu_iter, | |
1834 | (struct carl9170_sta_tid *) &ar->tx_ampdu_list); | |
1835 | ||
1836 | bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num); | |
1837 | INIT_LIST_HEAD(&ar->vif_list); | |
1838 | init_completion(&ar->tx_flush); | |
1839 | ||
df64962f CL |
1840 | /* firmware decides which modes we support */ |
1841 | hw->wiphy->interface_modes = 0; | |
fe8ee9ad | 1842 | |
30686bf7 JB |
1843 | ieee80211_hw_set(hw, RX_INCLUDES_FCS); |
1844 | ieee80211_hw_set(hw, MFP_CAPABLE); | |
1845 | ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); | |
1846 | ieee80211_hw_set(hw, SUPPORTS_PS); | |
1847 | ieee80211_hw_set(hw, PS_NULLFUNC_STACK); | |
1848 | ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); | |
1849 | ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); | |
1850 | ieee80211_hw_set(hw, SIGNAL_DBM); | |
1851 | ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES); | |
fe8ee9ad CL |
1852 | |
1853 | if (!modparam_noht) { | |
1854 | /* | |
1855 | * see the comment above, why we allow the user | |
1856 | * to disable HT by a module parameter. | |
1857 | */ | |
30686bf7 | 1858 | ieee80211_hw_set(hw, AMPDU_AGGREGATION); |
fe8ee9ad CL |
1859 | } |
1860 | ||
1861 | hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe); | |
1862 | hw->sta_data_size = sizeof(struct carl9170_sta_info); | |
1863 | hw->vif_data_size = sizeof(struct carl9170_vif_info); | |
1864 | ||
1865 | hw->max_rates = CARL9170_TX_MAX_RATES; | |
1866 | hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES; | |
1867 | ||
1868 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
1869 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
1870 | ||
ae44b502 AZ |
1871 | wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); |
1872 | ||
fe8ee9ad CL |
1873 | return ar; |
1874 | ||
1875 | err_nomem: | |
1876 | kfree_skb(skb); | |
1877 | return ERR_PTR(-ENOMEM); | |
1878 | } | |
1879 | ||
1880 | static int carl9170_read_eeprom(struct ar9170 *ar) | |
1881 | { | |
1882 | #define RW 8 /* number of words to read at once */ | |
1883 | #define RB (sizeof(u32) * RW) | |
1884 | u8 *eeprom = (void *)&ar->eeprom; | |
1885 | __le32 offsets[RW]; | |
1886 | int i, j, err; | |
1887 | ||
1888 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
1889 | ||
1890 | BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4); | |
1891 | #ifndef __CHECKER__ | |
1892 | /* don't want to handle trailing remains */ | |
1893 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
1894 | #endif | |
1895 | ||
3f29c522 | 1896 | for (i = 0; i < sizeof(ar->eeprom) / RB; i++) { |
fe8ee9ad CL |
1897 | for (j = 0; j < RW; j++) |
1898 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
1899 | RB * i + 4 * j); | |
1900 | ||
1901 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, | |
1902 | RB, (u8 *) &offsets, | |
1903 | RB, eeprom + RB * i); | |
1904 | if (err) | |
1905 | return err; | |
1906 | } | |
1907 | ||
1908 | #undef RW | |
1909 | #undef RB | |
1910 | return 0; | |
1911 | } | |
1912 | ||
1913 | static int carl9170_parse_eeprom(struct ar9170 *ar) | |
1914 | { | |
1915 | struct ath_regulatory *regulatory = &ar->common.regulatory; | |
1916 | unsigned int rx_streams, tx_streams, tx_params = 0; | |
1917 | int bands = 0; | |
acf17712 | 1918 | int chans = 0; |
fe8ee9ad CL |
1919 | |
1920 | if (ar->eeprom.length == cpu_to_le16(0xffff)) | |
1921 | return -ENODATA; | |
1922 | ||
1923 | rx_streams = hweight8(ar->eeprom.rx_mask); | |
1924 | tx_streams = hweight8(ar->eeprom.tx_mask); | |
1925 | ||
1926 | if (rx_streams != tx_streams) { | |
1927 | tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; | |
1928 | ||
1929 | WARN_ON(!(tx_streams >= 1 && tx_streams <= | |
1930 | IEEE80211_HT_MCS_TX_MAX_STREAMS)); | |
1931 | ||
1932 | tx_params = (tx_streams - 1) << | |
1933 | IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; | |
1934 | ||
1935 | carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; | |
1936 | carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; | |
1937 | } | |
1938 | ||
1939 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
57fbcce3 | 1940 | ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = |
fe8ee9ad | 1941 | &carl9170_band_2GHz; |
acf17712 | 1942 | chans += carl9170_band_2GHz.n_channels; |
fe8ee9ad CL |
1943 | bands++; |
1944 | } | |
1945 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
57fbcce3 | 1946 | ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = |
fe8ee9ad | 1947 | &carl9170_band_5GHz; |
acf17712 | 1948 | chans += carl9170_band_5GHz.n_channels; |
fe8ee9ad CL |
1949 | bands++; |
1950 | } | |
1951 | ||
acf17712 CL |
1952 | if (!bands) |
1953 | return -EINVAL; | |
1954 | ||
6396bb22 | 1955 | ar->survey = kcalloc(chans, sizeof(struct survey_info), GFP_KERNEL); |
acf17712 CL |
1956 | if (!ar->survey) |
1957 | return -ENOMEM; | |
1958 | ar->num_channels = chans; | |
1959 | ||
fe8ee9ad | 1960 | regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); |
fe8ee9ad CL |
1961 | |
1962 | /* second part of wiphy init */ | |
1963 | SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address); | |
1964 | ||
acf17712 | 1965 | return 0; |
fe8ee9ad CL |
1966 | } |
1967 | ||
0c0280bd LR |
1968 | static void carl9170_reg_notifier(struct wiphy *wiphy, |
1969 | struct regulatory_request *request) | |
fe8ee9ad CL |
1970 | { |
1971 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
1972 | struct ar9170 *ar = hw->priv; | |
1973 | ||
0c0280bd | 1974 | ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); |
fe8ee9ad CL |
1975 | } |
1976 | ||
1977 | int carl9170_register(struct ar9170 *ar) | |
1978 | { | |
1979 | struct ath_regulatory *regulatory = &ar->common.regulatory; | |
1980 | int err = 0, i; | |
1981 | ||
1982 | if (WARN_ON(ar->mem_bitmap)) | |
1983 | return -EINVAL; | |
1984 | ||
6396bb22 KC |
1985 | ar->mem_bitmap = kcalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG), |
1986 | sizeof(unsigned long), | |
1987 | GFP_KERNEL); | |
fe8ee9ad CL |
1988 | |
1989 | if (!ar->mem_bitmap) | |
1990 | return -ENOMEM; | |
1991 | ||
1992 | /* try to read EEPROM, init MAC addr */ | |
1993 | err = carl9170_read_eeprom(ar); | |
1994 | if (err) | |
1995 | return err; | |
1996 | ||
fe8ee9ad CL |
1997 | err = carl9170_parse_eeprom(ar); |
1998 | if (err) | |
1999 | return err; | |
2000 | ||
2001 | err = ath_regd_init(regulatory, ar->hw->wiphy, | |
2002 | carl9170_reg_notifier); | |
2003 | if (err) | |
2004 | return err; | |
2005 | ||
2006 | if (modparam_noht) { | |
2007 | carl9170_band_2GHz.ht_cap.ht_supported = false; | |
2008 | carl9170_band_5GHz.ht_cap.ht_supported = false; | |
2009 | } | |
2010 | ||
2011 | for (i = 0; i < ar->fw.vif_num; i++) { | |
2012 | ar->vif_priv[i].id = i; | |
2013 | ar->vif_priv[i].vif = NULL; | |
2014 | } | |
2015 | ||
2016 | err = ieee80211_register_hw(ar->hw); | |
2017 | if (err) | |
2018 | return err; | |
2019 | ||
2020 | /* mac80211 interface is now registered */ | |
2021 | ar->registered = true; | |
2022 | ||
2023 | if (!ath_is_world_regd(regulatory)) | |
2024 | regulatory_hint(ar->hw->wiphy, regulatory->alpha2); | |
2025 | ||
2026 | #ifdef CONFIG_CARL9170_DEBUGFS | |
2027 | carl9170_debugfs_register(ar); | |
2028 | #endif /* CONFIG_CARL9170_DEBUGFS */ | |
2029 | ||
2030 | err = carl9170_led_init(ar); | |
2031 | if (err) | |
2032 | goto err_unreg; | |
2033 | ||
2034 | #ifdef CONFIG_CARL9170_LEDS | |
2035 | err = carl9170_led_register(ar); | |
2036 | if (err) | |
2037 | goto err_unreg; | |
8e7ce893 | 2038 | #endif /* CONFIG_CARL9170_LEDS */ |
fe8ee9ad CL |
2039 | |
2040 | #ifdef CONFIG_CARL9170_WPC | |
2041 | err = carl9170_register_wps_button(ar); | |
2042 | if (err) | |
2043 | goto err_unreg; | |
2044 | #endif /* CONFIG_CARL9170_WPC */ | |
2045 | ||
00044f17 CL |
2046 | #ifdef CONFIG_CARL9170_HWRNG |
2047 | err = carl9170_register_hwrng(ar); | |
2048 | if (err) | |
2049 | goto err_unreg; | |
2050 | #endif /* CONFIG_CARL9170_HWRNG */ | |
2051 | ||
fe8ee9ad CL |
2052 | dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n", |
2053 | wiphy_name(ar->hw->wiphy)); | |
2054 | ||
2055 | return 0; | |
2056 | ||
2057 | err_unreg: | |
2058 | carl9170_unregister(ar); | |
2059 | return err; | |
2060 | } | |
2061 | ||
2062 | void carl9170_unregister(struct ar9170 *ar) | |
2063 | { | |
2064 | if (!ar->registered) | |
2065 | return; | |
2066 | ||
2067 | ar->registered = false; | |
2068 | ||
2069 | #ifdef CONFIG_CARL9170_LEDS | |
2070 | carl9170_led_unregister(ar); | |
2071 | #endif /* CONFIG_CARL9170_LEDS */ | |
2072 | ||
2073 | #ifdef CONFIG_CARL9170_DEBUGFS | |
2074 | carl9170_debugfs_unregister(ar); | |
2075 | #endif /* CONFIG_CARL9170_DEBUGFS */ | |
2076 | ||
2077 | #ifdef CONFIG_CARL9170_WPC | |
2078 | if (ar->wps.pbc) { | |
2079 | input_unregister_device(ar->wps.pbc); | |
2080 | ar->wps.pbc = NULL; | |
2081 | } | |
2082 | #endif /* CONFIG_CARL9170_WPC */ | |
2083 | ||
00044f17 CL |
2084 | #ifdef CONFIG_CARL9170_HWRNG |
2085 | carl9170_unregister_hwrng(ar); | |
2086 | #endif /* CONFIG_CARL9170_HWRNG */ | |
2087 | ||
fe8ee9ad CL |
2088 | carl9170_cancel_worker(ar); |
2089 | cancel_work_sync(&ar->restart_work); | |
2090 | ||
2091 | ieee80211_unregister_hw(ar->hw); | |
2092 | } | |
2093 | ||
2094 | void carl9170_free(struct ar9170 *ar) | |
2095 | { | |
2096 | WARN_ON(ar->registered); | |
2097 | WARN_ON(IS_INITIALIZED(ar)); | |
2098 | ||
2099 | kfree_skb(ar->rx_failover); | |
2100 | ar->rx_failover = NULL; | |
2101 | ||
2102 | kfree(ar->mem_bitmap); | |
2103 | ar->mem_bitmap = NULL; | |
2104 | ||
acf17712 CL |
2105 | kfree(ar->survey); |
2106 | ar->survey = NULL; | |
2107 | ||
fe8ee9ad CL |
2108 | mutex_destroy(&ar->mutex); |
2109 | ||
2110 | ieee80211_free_hw(ar->hw); | |
2111 | } |