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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 | ||
40 | #include <linux/init.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/etherdevice.h> | |
44 | #include <linux/random.h> | |
45 | #include <net/mac80211.h> | |
46 | #include <net/cfg80211.h> | |
47 | #include "hw.h" | |
48 | #include "carl9170.h" | |
49 | #include "cmd.h" | |
50 | ||
eb939922 | 51 | static bool modparam_nohwcrypt; |
fe8ee9ad CL |
52 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); |
53 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload."); | |
54 | ||
55 | int modparam_noht; | |
56 | module_param_named(noht, modparam_noht, int, S_IRUGO); | |
57 | MODULE_PARM_DESC(noht, "Disable MPDU aggregation."); | |
58 | ||
59 | #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \ | |
60 | .bitrate = (_bitrate), \ | |
61 | .flags = (_flags), \ | |
62 | .hw_value = (_hw_rate) | (_txpidx) << 4, \ | |
63 | } | |
64 | ||
65 | struct ieee80211_rate __carl9170_ratetable[] = { | |
66 | RATE(10, 0, 0, 0), | |
67 | RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE), | |
68 | RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE), | |
69 | RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE), | |
70 | RATE(60, 0xb, 0, 0), | |
71 | RATE(90, 0xf, 0, 0), | |
72 | RATE(120, 0xa, 0, 0), | |
73 | RATE(180, 0xe, 0, 0), | |
74 | RATE(240, 0x9, 0, 0), | |
75 | RATE(360, 0xd, 1, 0), | |
76 | RATE(480, 0x8, 2, 0), | |
77 | RATE(540, 0xc, 3, 0), | |
78 | }; | |
79 | #undef RATE | |
80 | ||
81 | #define carl9170_g_ratetable (__carl9170_ratetable + 0) | |
82 | #define carl9170_g_ratetable_size 12 | |
83 | #define carl9170_a_ratetable (__carl9170_ratetable + 4) | |
84 | #define carl9170_a_ratetable_size 8 | |
85 | ||
86 | /* | |
87 | * NB: The hw_value is used as an index into the carl9170_phy_freq_params | |
88 | * array in phy.c so that we don't have to do frequency lookups! | |
89 | */ | |
90 | #define CHAN(_freq, _idx) { \ | |
91 | .center_freq = (_freq), \ | |
92 | .hw_value = (_idx), \ | |
93 | .max_power = 18, /* XXX */ \ | |
94 | } | |
95 | ||
96 | static struct ieee80211_channel carl9170_2ghz_chantable[] = { | |
97 | CHAN(2412, 0), | |
98 | CHAN(2417, 1), | |
99 | CHAN(2422, 2), | |
100 | CHAN(2427, 3), | |
101 | CHAN(2432, 4), | |
102 | CHAN(2437, 5), | |
103 | CHAN(2442, 6), | |
104 | CHAN(2447, 7), | |
105 | CHAN(2452, 8), | |
106 | CHAN(2457, 9), | |
107 | CHAN(2462, 10), | |
108 | CHAN(2467, 11), | |
109 | CHAN(2472, 12), | |
110 | CHAN(2484, 13), | |
111 | }; | |
112 | ||
113 | static struct ieee80211_channel carl9170_5ghz_chantable[] = { | |
114 | CHAN(4920, 14), | |
115 | CHAN(4940, 15), | |
116 | CHAN(4960, 16), | |
117 | CHAN(4980, 17), | |
118 | CHAN(5040, 18), | |
119 | CHAN(5060, 19), | |
120 | CHAN(5080, 20), | |
121 | CHAN(5180, 21), | |
122 | CHAN(5200, 22), | |
123 | CHAN(5220, 23), | |
124 | CHAN(5240, 24), | |
125 | CHAN(5260, 25), | |
126 | CHAN(5280, 26), | |
127 | CHAN(5300, 27), | |
128 | CHAN(5320, 28), | |
129 | CHAN(5500, 29), | |
130 | CHAN(5520, 30), | |
131 | CHAN(5540, 31), | |
132 | CHAN(5560, 32), | |
133 | CHAN(5580, 33), | |
134 | CHAN(5600, 34), | |
135 | CHAN(5620, 35), | |
136 | CHAN(5640, 36), | |
137 | CHAN(5660, 37), | |
138 | CHAN(5680, 38), | |
139 | CHAN(5700, 39), | |
140 | CHAN(5745, 40), | |
141 | CHAN(5765, 41), | |
142 | CHAN(5785, 42), | |
143 | CHAN(5805, 43), | |
144 | CHAN(5825, 44), | |
145 | CHAN(5170, 45), | |
146 | CHAN(5190, 46), | |
147 | CHAN(5210, 47), | |
148 | CHAN(5230, 48), | |
149 | }; | |
150 | #undef CHAN | |
151 | ||
152 | #define CARL9170_HT_CAP \ | |
153 | { \ | |
154 | .ht_supported = true, \ | |
155 | .cap = IEEE80211_HT_CAP_MAX_AMSDU | \ | |
156 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \ | |
157 | IEEE80211_HT_CAP_SGI_40 | \ | |
158 | IEEE80211_HT_CAP_DSSSCCK40 | \ | |
159 | IEEE80211_HT_CAP_SM_PS, \ | |
160 | .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \ | |
161 | .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \ | |
162 | .mcs = { \ | |
163 | .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \ | |
164 | .rx_highest = cpu_to_le16(300), \ | |
165 | .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \ | |
166 | }, \ | |
167 | } | |
168 | ||
169 | static struct ieee80211_supported_band carl9170_band_2GHz = { | |
170 | .channels = carl9170_2ghz_chantable, | |
171 | .n_channels = ARRAY_SIZE(carl9170_2ghz_chantable), | |
172 | .bitrates = carl9170_g_ratetable, | |
173 | .n_bitrates = carl9170_g_ratetable_size, | |
174 | .ht_cap = CARL9170_HT_CAP, | |
175 | }; | |
176 | ||
177 | static struct ieee80211_supported_band carl9170_band_5GHz = { | |
178 | .channels = carl9170_5ghz_chantable, | |
179 | .n_channels = ARRAY_SIZE(carl9170_5ghz_chantable), | |
180 | .bitrates = carl9170_a_ratetable, | |
181 | .n_bitrates = carl9170_a_ratetable_size, | |
182 | .ht_cap = CARL9170_HT_CAP, | |
183 | }; | |
184 | ||
185 | static void carl9170_ampdu_gc(struct ar9170 *ar) | |
186 | { | |
187 | struct carl9170_sta_tid *tid_info; | |
188 | LIST_HEAD(tid_gc); | |
189 | ||
190 | rcu_read_lock(); | |
191 | list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { | |
192 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
193 | if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) { | |
194 | tid_info->state = CARL9170_TID_STATE_KILLED; | |
195 | list_del_rcu(&tid_info->list); | |
196 | ar->tx_ampdu_list_len--; | |
197 | list_add_tail(&tid_info->tmp_list, &tid_gc); | |
198 | } | |
199 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
200 | ||
201 | } | |
202 | rcu_assign_pointer(ar->tx_ampdu_iter, tid_info); | |
203 | rcu_read_unlock(); | |
204 | ||
205 | synchronize_rcu(); | |
206 | ||
207 | while (!list_empty(&tid_gc)) { | |
208 | struct sk_buff *skb; | |
209 | tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid, | |
210 | tmp_list); | |
211 | ||
212 | while ((skb = __skb_dequeue(&tid_info->queue))) | |
213 | carl9170_tx_status(ar, skb, false); | |
214 | ||
215 | list_del_init(&tid_info->tmp_list); | |
216 | kfree(tid_info); | |
217 | } | |
218 | } | |
219 | ||
220 | static void carl9170_flush(struct ar9170 *ar, bool drop_queued) | |
221 | { | |
222 | if (drop_queued) { | |
223 | int i; | |
224 | ||
225 | /* | |
226 | * We can only drop frames which have not been uploaded | |
227 | * to the device yet. | |
228 | */ | |
229 | ||
230 | for (i = 0; i < ar->hw->queues; i++) { | |
231 | struct sk_buff *skb; | |
232 | ||
cb139ecc CL |
233 | while ((skb = skb_dequeue(&ar->tx_pending[i]))) { |
234 | struct ieee80211_tx_info *info; | |
235 | ||
236 | info = IEEE80211_SKB_CB(skb); | |
237 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
238 | atomic_dec(&ar->tx_ampdu_upload); | |
239 | ||
fe8ee9ad | 240 | carl9170_tx_status(ar, skb, false); |
cb139ecc | 241 | } |
fe8ee9ad CL |
242 | } |
243 | } | |
244 | ||
245 | /* Wait for all other outstanding frames to timeout. */ | |
246 | if (atomic_read(&ar->tx_total_queued)) | |
247 | WARN_ON(wait_for_completion_timeout(&ar->tx_flush, HZ) == 0); | |
248 | } | |
249 | ||
250 | static void carl9170_flush_ba(struct ar9170 *ar) | |
251 | { | |
252 | struct sk_buff_head free; | |
253 | struct carl9170_sta_tid *tid_info; | |
254 | struct sk_buff *skb; | |
255 | ||
256 | __skb_queue_head_init(&free); | |
257 | ||
258 | rcu_read_lock(); | |
259 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
260 | list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) { | |
261 | if (tid_info->state > CARL9170_TID_STATE_SUSPEND) { | |
262 | tid_info->state = CARL9170_TID_STATE_SUSPEND; | |
263 | ||
264 | spin_lock(&tid_info->lock); | |
265 | while ((skb = __skb_dequeue(&tid_info->queue))) | |
266 | __skb_queue_tail(&free, skb); | |
267 | spin_unlock(&tid_info->lock); | |
268 | } | |
269 | } | |
270 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
271 | rcu_read_unlock(); | |
272 | ||
273 | while ((skb = __skb_dequeue(&free))) | |
274 | carl9170_tx_status(ar, skb, false); | |
275 | } | |
276 | ||
277 | static void carl9170_zap_queues(struct ar9170 *ar) | |
278 | { | |
279 | struct carl9170_vif_info *cvif; | |
280 | unsigned int i; | |
281 | ||
282 | carl9170_ampdu_gc(ar); | |
283 | ||
284 | carl9170_flush_ba(ar); | |
285 | carl9170_flush(ar, true); | |
286 | ||
287 | for (i = 0; i < ar->hw->queues; i++) { | |
288 | spin_lock_bh(&ar->tx_status[i].lock); | |
289 | while (!skb_queue_empty(&ar->tx_status[i])) { | |
290 | struct sk_buff *skb; | |
291 | ||
292 | skb = skb_peek(&ar->tx_status[i]); | |
293 | carl9170_tx_get_skb(skb); | |
294 | spin_unlock_bh(&ar->tx_status[i].lock); | |
295 | carl9170_tx_drop(ar, skb); | |
296 | spin_lock_bh(&ar->tx_status[i].lock); | |
297 | carl9170_tx_put_skb(skb); | |
298 | } | |
299 | spin_unlock_bh(&ar->tx_status[i].lock); | |
300 | } | |
301 | ||
302 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1); | |
303 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT); | |
304 | BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS); | |
305 | ||
306 | /* reinitialize queues statistics */ | |
307 | memset(&ar->tx_stats, 0, sizeof(ar->tx_stats)); | |
308 | for (i = 0; i < ar->hw->queues; i++) | |
309 | ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD; | |
310 | ||
311 | for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++) | |
312 | ar->mem_bitmap[i] = 0; | |
313 | ||
314 | rcu_read_lock(); | |
315 | list_for_each_entry_rcu(cvif, &ar->vif_list, list) { | |
316 | spin_lock_bh(&ar->beacon_lock); | |
317 | dev_kfree_skb_any(cvif->beacon); | |
318 | cvif->beacon = NULL; | |
319 | spin_unlock_bh(&ar->beacon_lock); | |
320 | } | |
321 | rcu_read_unlock(); | |
322 | ||
323 | atomic_set(&ar->tx_ampdu_upload, 0); | |
324 | atomic_set(&ar->tx_ampdu_scheduler, 0); | |
325 | atomic_set(&ar->tx_total_pending, 0); | |
326 | atomic_set(&ar->tx_total_queued, 0); | |
327 | atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks); | |
328 | } | |
329 | ||
330 | #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \ | |
331 | do { \ | |
332 | queue.aifs = ai_fs; \ | |
333 | queue.cw_min = cwmin; \ | |
334 | queue.cw_max = cwmax; \ | |
335 | queue.txop = _txop; \ | |
336 | } while (0) | |
337 | ||
338 | static int carl9170_op_start(struct ieee80211_hw *hw) | |
339 | { | |
340 | struct ar9170 *ar = hw->priv; | |
341 | int err, i; | |
342 | ||
343 | mutex_lock(&ar->mutex); | |
344 | ||
345 | carl9170_zap_queues(ar); | |
346 | ||
347 | /* reset QoS defaults */ | |
c2a7965f CL |
348 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47); |
349 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94); | |
350 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0); | |
351 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0); | |
352 | CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0); | |
fe8ee9ad CL |
353 | |
354 | ar->current_factor = ar->current_density = -1; | |
355 | /* "The first key is unique." */ | |
356 | ar->usedkeys = 1; | |
357 | ar->filter_state = 0; | |
358 | ar->ps.last_action = jiffies; | |
359 | ar->ps.last_slept = jiffies; | |
360 | ar->erp_mode = CARL9170_ERP_AUTO; | |
361 | ar->rx_software_decryption = false; | |
362 | ar->disable_offload = false; | |
363 | ||
364 | for (i = 0; i < ar->hw->queues; i++) { | |
365 | ar->queue_stop_timeout[i] = jiffies; | |
366 | ar->max_queue_stop_timeout[i] = 0; | |
367 | } | |
368 | ||
369 | atomic_set(&ar->mem_allocs, 0); | |
370 | ||
371 | err = carl9170_usb_open(ar); | |
372 | if (err) | |
373 | goto out; | |
374 | ||
375 | err = carl9170_init_mac(ar); | |
376 | if (err) | |
377 | goto out; | |
378 | ||
379 | err = carl9170_set_qos(ar); | |
380 | if (err) | |
381 | goto out; | |
382 | ||
5c895691 CL |
383 | if (ar->fw.rx_filter) { |
384 | err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA | | |
385 | CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD); | |
386 | if (err) | |
387 | goto out; | |
388 | } | |
389 | ||
fe8ee9ad CL |
390 | err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, |
391 | AR9170_DMA_TRIGGER_RXQ); | |
392 | if (err) | |
393 | goto out; | |
394 | ||
395 | /* Clear key-cache */ | |
396 | for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) { | |
397 | err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, | |
398 | 0, NULL, 0); | |
399 | if (err) | |
400 | goto out; | |
401 | ||
402 | err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE, | |
403 | 1, NULL, 0); | |
404 | if (err) | |
405 | goto out; | |
406 | ||
407 | if (i < AR9170_CAM_MAX_USER) { | |
408 | err = carl9170_disable_key(ar, i); | |
409 | if (err) | |
410 | goto out; | |
411 | } | |
412 | } | |
413 | ||
414 | carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED); | |
415 | ||
acf17712 CL |
416 | ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, |
417 | round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); | |
418 | ||
fe8ee9ad CL |
419 | ieee80211_wake_queues(ar->hw); |
420 | err = 0; | |
421 | ||
422 | out: | |
423 | mutex_unlock(&ar->mutex); | |
424 | return err; | |
425 | } | |
426 | ||
427 | static void carl9170_cancel_worker(struct ar9170 *ar) | |
428 | { | |
acf17712 | 429 | cancel_delayed_work_sync(&ar->stat_work); |
fe8ee9ad CL |
430 | cancel_delayed_work_sync(&ar->tx_janitor); |
431 | #ifdef CONFIG_CARL9170_LEDS | |
432 | cancel_delayed_work_sync(&ar->led_work); | |
433 | #endif /* CONFIG_CARL9170_LEDS */ | |
434 | cancel_work_sync(&ar->ps_work); | |
e4a668c5 | 435 | cancel_work_sync(&ar->ping_work); |
fe8ee9ad CL |
436 | cancel_work_sync(&ar->ampdu_work); |
437 | } | |
438 | ||
439 | static void carl9170_op_stop(struct ieee80211_hw *hw) | |
440 | { | |
441 | struct ar9170 *ar = hw->priv; | |
442 | ||
443 | carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); | |
444 | ||
445 | ieee80211_stop_queues(ar->hw); | |
446 | ||
447 | mutex_lock(&ar->mutex); | |
448 | if (IS_ACCEPTING_CMD(ar)) { | |
2cfa5a04 | 449 | RCU_INIT_POINTER(ar->beacon_iter, NULL); |
fe8ee9ad CL |
450 | |
451 | carl9170_led_set_state(ar, 0); | |
452 | ||
453 | /* stop DMA */ | |
454 | carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0); | |
455 | carl9170_usb_stop(ar); | |
456 | } | |
457 | ||
458 | carl9170_zap_queues(ar); | |
459 | mutex_unlock(&ar->mutex); | |
460 | ||
461 | carl9170_cancel_worker(ar); | |
462 | } | |
463 | ||
464 | static void carl9170_restart_work(struct work_struct *work) | |
465 | { | |
466 | struct ar9170 *ar = container_of(work, struct ar9170, | |
467 | restart_work); | |
468 | int err; | |
469 | ||
470 | ar->usedkeys = 0; | |
471 | ar->filter_state = 0; | |
472 | carl9170_cancel_worker(ar); | |
473 | ||
474 | mutex_lock(&ar->mutex); | |
475 | err = carl9170_usb_restart(ar); | |
476 | if (net_ratelimit()) { | |
477 | if (err) { | |
478 | dev_err(&ar->udev->dev, "Failed to restart device " | |
479 | " (%d).\n", err); | |
480 | } else { | |
481 | dev_info(&ar->udev->dev, "device restarted " | |
482 | "successfully.\n"); | |
483 | } | |
484 | } | |
485 | ||
486 | carl9170_zap_queues(ar); | |
487 | mutex_unlock(&ar->mutex); | |
488 | if (!err) { | |
489 | ar->restart_counter++; | |
490 | atomic_set(&ar->pending_restarts, 0); | |
491 | ||
492 | ieee80211_restart_hw(ar->hw); | |
493 | } else { | |
494 | /* | |
495 | * The reset was unsuccessful and the device seems to | |
496 | * be dead. But there's still one option: a low-level | |
497 | * usb subsystem reset... | |
498 | */ | |
499 | ||
500 | carl9170_usb_reset(ar); | |
501 | } | |
502 | } | |
503 | ||
504 | void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r) | |
505 | { | |
506 | carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE); | |
507 | ||
508 | /* | |
509 | * Sometimes, an error can trigger several different reset events. | |
510 | * By ignoring these *surplus* reset events, the device won't be | |
511 | * killed again, right after it has recovered. | |
512 | */ | |
513 | if (atomic_inc_return(&ar->pending_restarts) > 1) { | |
514 | dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r); | |
515 | return; | |
516 | } | |
517 | ||
518 | ieee80211_stop_queues(ar->hw); | |
519 | ||
520 | dev_err(&ar->udev->dev, "restart device (%d)\n", r); | |
521 | ||
522 | if (!WARN_ON(r == CARL9170_RR_NO_REASON) || | |
523 | !WARN_ON(r >= __CARL9170_RR_LAST)) | |
524 | ar->last_reason = r; | |
525 | ||
526 | if (!ar->registered) | |
527 | return; | |
528 | ||
529 | if (IS_ACCEPTING_CMD(ar) && !ar->needs_full_reset) | |
530 | ieee80211_queue_work(ar->hw, &ar->restart_work); | |
531 | else | |
532 | carl9170_usb_reset(ar); | |
533 | ||
534 | /* | |
535 | * At this point, the device instance might have vanished/disabled. | |
536 | * So, don't put any code which access the ar9170 struct | |
537 | * without proper protection. | |
538 | */ | |
539 | } | |
540 | ||
e4a668c5 CL |
541 | static void carl9170_ping_work(struct work_struct *work) |
542 | { | |
543 | struct ar9170 *ar = container_of(work, struct ar9170, ping_work); | |
544 | int err; | |
545 | ||
546 | if (!IS_STARTED(ar)) | |
547 | return; | |
548 | ||
549 | mutex_lock(&ar->mutex); | |
550 | err = carl9170_echo_test(ar, 0xdeadbeef); | |
551 | if (err) | |
552 | carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE); | |
553 | mutex_unlock(&ar->mutex); | |
554 | } | |
555 | ||
fe8ee9ad CL |
556 | static int carl9170_init_interface(struct ar9170 *ar, |
557 | struct ieee80211_vif *vif) | |
558 | { | |
559 | struct ath_common *common = &ar->common; | |
560 | int err; | |
561 | ||
562 | if (!vif) { | |
563 | WARN_ON_ONCE(IS_STARTED(ar)); | |
564 | return 0; | |
565 | } | |
566 | ||
567 | memcpy(common->macaddr, vif->addr, ETH_ALEN); | |
568 | ||
569 | if (modparam_nohwcrypt || | |
570 | ((vif->type != NL80211_IFTYPE_STATION) && | |
571 | (vif->type != NL80211_IFTYPE_AP))) { | |
572 | ar->rx_software_decryption = true; | |
573 | ar->disable_offload = true; | |
574 | } | |
575 | ||
576 | err = carl9170_set_operating_mode(ar); | |
577 | return err; | |
578 | } | |
579 | ||
580 | static int carl9170_op_add_interface(struct ieee80211_hw *hw, | |
581 | struct ieee80211_vif *vif) | |
582 | { | |
583 | struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; | |
584 | struct ieee80211_vif *main_vif; | |
585 | struct ar9170 *ar = hw->priv; | |
586 | int vif_id = -1, err = 0; | |
587 | ||
588 | mutex_lock(&ar->mutex); | |
589 | rcu_read_lock(); | |
590 | if (vif_priv->active) { | |
591 | /* | |
592 | * Skip the interface structure initialization, | |
593 | * if the vif survived the _restart call. | |
594 | */ | |
595 | vif_id = vif_priv->id; | |
596 | vif_priv->enable_beacon = false; | |
597 | ||
598 | spin_lock_bh(&ar->beacon_lock); | |
599 | dev_kfree_skb_any(vif_priv->beacon); | |
600 | vif_priv->beacon = NULL; | |
601 | spin_unlock_bh(&ar->beacon_lock); | |
602 | ||
603 | goto init; | |
604 | } | |
605 | ||
606 | main_vif = carl9170_get_main_vif(ar); | |
607 | ||
608 | if (main_vif) { | |
609 | switch (main_vif->type) { | |
610 | case NL80211_IFTYPE_STATION: | |
611 | if (vif->type == NL80211_IFTYPE_STATION) | |
612 | break; | |
613 | ||
614 | err = -EBUSY; | |
615 | rcu_read_unlock(); | |
616 | ||
617 | goto unlock; | |
618 | ||
619 | case NL80211_IFTYPE_AP: | |
620 | if ((vif->type == NL80211_IFTYPE_STATION) || | |
621 | (vif->type == NL80211_IFTYPE_WDS) || | |
622 | (vif->type == NL80211_IFTYPE_AP)) | |
623 | break; | |
624 | ||
625 | err = -EBUSY; | |
626 | rcu_read_unlock(); | |
627 | goto unlock; | |
628 | ||
629 | default: | |
630 | rcu_read_unlock(); | |
631 | goto unlock; | |
632 | } | |
633 | } | |
634 | ||
635 | vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0); | |
636 | ||
637 | if (vif_id < 0) { | |
638 | rcu_read_unlock(); | |
639 | ||
640 | err = -ENOSPC; | |
641 | goto unlock; | |
642 | } | |
643 | ||
644 | BUG_ON(ar->vif_priv[vif_id].id != vif_id); | |
645 | ||
646 | vif_priv->active = true; | |
647 | vif_priv->id = vif_id; | |
648 | vif_priv->enable_beacon = false; | |
649 | ar->vifs++; | |
650 | list_add_tail_rcu(&vif_priv->list, &ar->vif_list); | |
651 | rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif); | |
652 | ||
653 | init: | |
654 | if (carl9170_get_main_vif(ar) == vif) { | |
655 | rcu_assign_pointer(ar->beacon_iter, vif_priv); | |
656 | rcu_read_unlock(); | |
657 | ||
658 | err = carl9170_init_interface(ar, vif); | |
659 | if (err) | |
660 | goto unlock; | |
661 | } else { | |
fe8ee9ad | 662 | rcu_read_unlock(); |
dafeac38 | 663 | err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr); |
fe8ee9ad CL |
664 | |
665 | if (err) | |
666 | goto unlock; | |
667 | } | |
668 | ||
aa32452d CL |
669 | if (ar->fw.tx_seq_table) { |
670 | err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4, | |
671 | 0); | |
672 | if (err) | |
673 | goto unlock; | |
674 | } | |
675 | ||
fe8ee9ad | 676 | unlock: |
b397492a | 677 | if (err && (vif_id >= 0)) { |
fe8ee9ad CL |
678 | vif_priv->active = false; |
679 | bitmap_release_region(&ar->vif_bitmap, vif_id, 0); | |
680 | ar->vifs--; | |
2cfa5a04 | 681 | RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL); |
fe8ee9ad CL |
682 | list_del_rcu(&vif_priv->list); |
683 | mutex_unlock(&ar->mutex); | |
684 | synchronize_rcu(); | |
685 | } else { | |
686 | if (ar->vifs > 1) | |
687 | ar->ps.off_override |= PS_OFF_VIF; | |
688 | ||
689 | mutex_unlock(&ar->mutex); | |
690 | } | |
691 | ||
692 | return err; | |
693 | } | |
694 | ||
695 | static void carl9170_op_remove_interface(struct ieee80211_hw *hw, | |
696 | struct ieee80211_vif *vif) | |
697 | { | |
698 | struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv; | |
699 | struct ieee80211_vif *main_vif; | |
700 | struct ar9170 *ar = hw->priv; | |
701 | unsigned int id; | |
702 | ||
703 | mutex_lock(&ar->mutex); | |
704 | ||
705 | if (WARN_ON_ONCE(!vif_priv->active)) | |
706 | goto unlock; | |
707 | ||
708 | ar->vifs--; | |
709 | ||
710 | rcu_read_lock(); | |
711 | main_vif = carl9170_get_main_vif(ar); | |
712 | ||
713 | id = vif_priv->id; | |
714 | ||
715 | vif_priv->active = false; | |
716 | WARN_ON(vif_priv->enable_beacon); | |
717 | vif_priv->enable_beacon = false; | |
718 | list_del_rcu(&vif_priv->list); | |
2cfa5a04 | 719 | RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL); |
fe8ee9ad CL |
720 | |
721 | if (vif == main_vif) { | |
722 | rcu_read_unlock(); | |
723 | ||
724 | if (ar->vifs) { | |
725 | WARN_ON(carl9170_init_interface(ar, | |
726 | carl9170_get_main_vif(ar))); | |
727 | } else { | |
728 | carl9170_set_operating_mode(ar); | |
729 | } | |
730 | } else { | |
731 | rcu_read_unlock(); | |
732 | ||
733 | WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL)); | |
734 | } | |
735 | ||
736 | carl9170_update_beacon(ar, false); | |
737 | carl9170_flush_cab(ar, id); | |
738 | ||
739 | spin_lock_bh(&ar->beacon_lock); | |
740 | dev_kfree_skb_any(vif_priv->beacon); | |
741 | vif_priv->beacon = NULL; | |
742 | spin_unlock_bh(&ar->beacon_lock); | |
743 | ||
744 | bitmap_release_region(&ar->vif_bitmap, id, 0); | |
745 | ||
746 | carl9170_set_beacon_timers(ar); | |
747 | ||
748 | if (ar->vifs == 1) | |
749 | ar->ps.off_override &= ~PS_OFF_VIF; | |
750 | ||
751 | unlock: | |
752 | mutex_unlock(&ar->mutex); | |
753 | ||
754 | synchronize_rcu(); | |
755 | } | |
756 | ||
757 | void carl9170_ps_check(struct ar9170 *ar) | |
758 | { | |
759 | ieee80211_queue_work(ar->hw, &ar->ps_work); | |
760 | } | |
761 | ||
762 | /* caller must hold ar->mutex */ | |
763 | static int carl9170_ps_update(struct ar9170 *ar) | |
764 | { | |
765 | bool ps = false; | |
766 | int err = 0; | |
767 | ||
768 | if (!ar->ps.off_override) | |
769 | ps = (ar->hw->conf.flags & IEEE80211_CONF_PS); | |
770 | ||
771 | if (ps != ar->ps.state) { | |
772 | err = carl9170_powersave(ar, ps); | |
773 | if (err) | |
774 | return err; | |
775 | ||
776 | if (ar->ps.state && !ps) { | |
777 | ar->ps.sleep_ms = jiffies_to_msecs(jiffies - | |
778 | ar->ps.last_action); | |
779 | } | |
780 | ||
781 | if (ps) | |
782 | ar->ps.last_slept = jiffies; | |
783 | ||
784 | ar->ps.last_action = jiffies; | |
785 | ar->ps.state = ps; | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
791 | static void carl9170_ps_work(struct work_struct *work) | |
792 | { | |
793 | struct ar9170 *ar = container_of(work, struct ar9170, | |
794 | ps_work); | |
795 | mutex_lock(&ar->mutex); | |
796 | if (IS_STARTED(ar)) | |
797 | WARN_ON_ONCE(carl9170_ps_update(ar) != 0); | |
798 | mutex_unlock(&ar->mutex); | |
799 | } | |
800 | ||
acf17712 CL |
801 | static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise) |
802 | { | |
803 | int err; | |
804 | ||
805 | if (noise) { | |
806 | err = carl9170_get_noisefloor(ar); | |
807 | if (err) | |
808 | return err; | |
809 | } | |
810 | ||
811 | if (ar->fw.hw_counters) { | |
812 | err = carl9170_collect_tally(ar); | |
813 | if (err) | |
814 | return err; | |
815 | } | |
816 | ||
817 | if (flush) | |
818 | memset(&ar->tally, 0, sizeof(ar->tally)); | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
823 | static void carl9170_stat_work(struct work_struct *work) | |
824 | { | |
825 | struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work); | |
826 | int err; | |
827 | ||
828 | mutex_lock(&ar->mutex); | |
829 | err = carl9170_update_survey(ar, false, true); | |
830 | mutex_unlock(&ar->mutex); | |
831 | ||
832 | if (err) | |
833 | return; | |
834 | ||
835 | ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, | |
836 | round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK))); | |
837 | } | |
fe8ee9ad CL |
838 | |
839 | static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed) | |
840 | { | |
841 | struct ar9170 *ar = hw->priv; | |
842 | int err = 0; | |
843 | ||
844 | mutex_lock(&ar->mutex); | |
845 | if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) { | |
846 | /* TODO */ | |
847 | err = 0; | |
848 | } | |
849 | ||
850 | if (changed & IEEE80211_CONF_CHANGE_PS) { | |
851 | err = carl9170_ps_update(ar); | |
852 | if (err) | |
853 | goto out; | |
854 | } | |
855 | ||
856 | if (changed & IEEE80211_CONF_CHANGE_POWER) { | |
857 | /* TODO */ | |
858 | err = 0; | |
859 | } | |
860 | ||
861 | if (changed & IEEE80211_CONF_CHANGE_SMPS) { | |
862 | /* TODO */ | |
863 | err = 0; | |
864 | } | |
865 | ||
866 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
867 | /* adjust slot time for 5 GHz */ | |
868 | err = carl9170_set_slot_time(ar); | |
869 | if (err) | |
870 | goto out; | |
871 | ||
acf17712 CL |
872 | err = carl9170_update_survey(ar, true, false); |
873 | if (err) | |
874 | goto out; | |
875 | ||
fe8ee9ad CL |
876 | err = carl9170_set_channel(ar, hw->conf.channel, |
877 | hw->conf.channel_type, CARL9170_RFI_NONE); | |
878 | if (err) | |
879 | goto out; | |
880 | ||
acf17712 CL |
881 | err = carl9170_update_survey(ar, false, true); |
882 | if (err) | |
883 | goto out; | |
884 | ||
fe8ee9ad CL |
885 | err = carl9170_set_dyn_sifs_ack(ar); |
886 | if (err) | |
887 | goto out; | |
888 | ||
889 | err = carl9170_set_rts_cts_rate(ar); | |
890 | if (err) | |
891 | goto out; | |
892 | } | |
893 | ||
894 | out: | |
895 | mutex_unlock(&ar->mutex); | |
896 | return err; | |
897 | } | |
898 | ||
899 | static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw, | |
900 | struct netdev_hw_addr_list *mc_list) | |
901 | { | |
902 | struct netdev_hw_addr *ha; | |
903 | u64 mchash; | |
904 | ||
905 | /* always get broadcast frames */ | |
906 | mchash = 1ULL << (0xff >> 2); | |
907 | ||
908 | netdev_hw_addr_list_for_each(ha, mc_list) | |
909 | mchash |= 1ULL << (ha->addr[5] >> 2); | |
910 | ||
911 | return mchash; | |
912 | } | |
913 | ||
914 | static void carl9170_op_configure_filter(struct ieee80211_hw *hw, | |
915 | unsigned int changed_flags, | |
916 | unsigned int *new_flags, | |
917 | u64 multicast) | |
918 | { | |
919 | struct ar9170 *ar = hw->priv; | |
920 | ||
921 | /* mask supported flags */ | |
5c895691 | 922 | *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps; |
fe8ee9ad CL |
923 | |
924 | if (!IS_ACCEPTING_CMD(ar)) | |
925 | return; | |
926 | ||
927 | mutex_lock(&ar->mutex); | |
928 | ||
929 | ar->filter_state = *new_flags; | |
930 | /* | |
931 | * We can support more by setting the sniffer bit and | |
932 | * then checking the error flags, later. | |
933 | */ | |
934 | ||
8f7f3b2f | 935 | if (*new_flags & FIF_ALLMULTI) |
fe8ee9ad CL |
936 | multicast = ~0ULL; |
937 | ||
938 | if (multicast != ar->cur_mc_hash) | |
939 | WARN_ON(carl9170_update_multicast(ar, multicast)); | |
940 | ||
941 | if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) { | |
942 | ar->sniffer_enabled = !!(*new_flags & | |
943 | (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)); | |
944 | ||
945 | WARN_ON(carl9170_set_operating_mode(ar)); | |
946 | } | |
947 | ||
5c895691 CL |
948 | if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) { |
949 | u32 rx_filter = 0; | |
950 | ||
951 | if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))) | |
952 | rx_filter |= CARL9170_RX_FILTER_BAD; | |
953 | ||
954 | if (!(*new_flags & FIF_CONTROL)) | |
955 | rx_filter |= CARL9170_RX_FILTER_CTL_OTHER; | |
956 | ||
957 | if (!(*new_flags & FIF_PSPOLL)) | |
958 | rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL; | |
959 | ||
960 | if (!(*new_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))) { | |
961 | rx_filter |= CARL9170_RX_FILTER_OTHER_RA; | |
962 | rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL; | |
963 | } | |
964 | ||
965 | WARN_ON(carl9170_rx_filter(ar, rx_filter)); | |
966 | } | |
967 | ||
fe8ee9ad CL |
968 | mutex_unlock(&ar->mutex); |
969 | } | |
970 | ||
971 | ||
972 | static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw, | |
973 | struct ieee80211_vif *vif, | |
974 | struct ieee80211_bss_conf *bss_conf, | |
975 | u32 changed) | |
976 | { | |
977 | struct ar9170 *ar = hw->priv; | |
978 | struct ath_common *common = &ar->common; | |
979 | int err = 0; | |
980 | struct carl9170_vif_info *vif_priv; | |
981 | struct ieee80211_vif *main_vif; | |
982 | ||
983 | mutex_lock(&ar->mutex); | |
984 | vif_priv = (void *) vif->drv_priv; | |
985 | main_vif = carl9170_get_main_vif(ar); | |
986 | if (WARN_ON(!main_vif)) | |
987 | goto out; | |
988 | ||
989 | if (changed & BSS_CHANGED_BEACON_ENABLED) { | |
990 | struct carl9170_vif_info *iter; | |
991 | int i = 0; | |
992 | ||
993 | vif_priv->enable_beacon = bss_conf->enable_beacon; | |
994 | rcu_read_lock(); | |
995 | list_for_each_entry_rcu(iter, &ar->vif_list, list) { | |
996 | if (iter->active && iter->enable_beacon) | |
997 | i++; | |
998 | ||
999 | } | |
1000 | rcu_read_unlock(); | |
1001 | ||
1002 | ar->beacon_enabled = i; | |
1003 | } | |
1004 | ||
1005 | if (changed & BSS_CHANGED_BEACON) { | |
1006 | err = carl9170_update_beacon(ar, false); | |
1007 | if (err) | |
1008 | goto out; | |
1009 | } | |
1010 | ||
1011 | if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON | | |
1012 | BSS_CHANGED_BEACON_INT)) { | |
1013 | ||
1014 | if (main_vif != vif) { | |
1015 | bss_conf->beacon_int = main_vif->bss_conf.beacon_int; | |
1016 | bss_conf->dtim_period = main_vif->bss_conf.dtim_period; | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * Therefore a hard limit for the broadcast traffic should | |
1021 | * prevent false alarms. | |
1022 | */ | |
1023 | if (vif->type != NL80211_IFTYPE_STATION && | |
1024 | (bss_conf->beacon_int * bss_conf->dtim_period >= | |
1025 | (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) { | |
1026 | err = -EINVAL; | |
1027 | goto out; | |
1028 | } | |
1029 | ||
1030 | err = carl9170_set_beacon_timers(ar); | |
1031 | if (err) | |
1032 | goto out; | |
1033 | } | |
1034 | ||
1035 | if (changed & BSS_CHANGED_HT) { | |
1036 | /* TODO */ | |
1037 | err = 0; | |
1038 | if (err) | |
1039 | goto out; | |
1040 | } | |
1041 | ||
1042 | if (main_vif != vif) | |
1043 | goto out; | |
1044 | ||
1045 | /* | |
1046 | * The following settings can only be changed by the | |
1047 | * master interface. | |
1048 | */ | |
1049 | ||
1050 | if (changed & BSS_CHANGED_BSSID) { | |
1051 | memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); | |
1052 | err = carl9170_set_operating_mode(ar); | |
1053 | if (err) | |
1054 | goto out; | |
1055 | } | |
1056 | ||
1057 | if (changed & BSS_CHANGED_ASSOC) { | |
1058 | ar->common.curaid = bss_conf->aid; | |
1059 | err = carl9170_set_beacon_timers(ar); | |
1060 | if (err) | |
1061 | goto out; | |
1062 | } | |
1063 | ||
1064 | if (changed & BSS_CHANGED_ERP_SLOT) { | |
1065 | err = carl9170_set_slot_time(ar); | |
1066 | if (err) | |
1067 | goto out; | |
1068 | } | |
1069 | ||
1070 | if (changed & BSS_CHANGED_BASIC_RATES) { | |
1071 | err = carl9170_set_mac_rates(ar); | |
1072 | if (err) | |
1073 | goto out; | |
1074 | } | |
1075 | ||
1076 | out: | |
1077 | WARN_ON_ONCE(err && IS_STARTED(ar)); | |
1078 | mutex_unlock(&ar->mutex); | |
1079 | } | |
1080 | ||
37a41b4a EP |
1081 | static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw, |
1082 | struct ieee80211_vif *vif) | |
fe8ee9ad CL |
1083 | { |
1084 | struct ar9170 *ar = hw->priv; | |
1085 | struct carl9170_tsf_rsp tsf; | |
1086 | int err; | |
1087 | ||
1088 | mutex_lock(&ar->mutex); | |
1089 | err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF, | |
1090 | 0, NULL, sizeof(tsf), &tsf); | |
1091 | mutex_unlock(&ar->mutex); | |
1092 | if (WARN_ON(err)) | |
1093 | return 0; | |
1094 | ||
1095 | return le64_to_cpu(tsf.tsf_64); | |
1096 | } | |
1097 | ||
1098 | static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
1099 | struct ieee80211_vif *vif, | |
1100 | struct ieee80211_sta *sta, | |
1101 | struct ieee80211_key_conf *key) | |
1102 | { | |
1103 | struct ar9170 *ar = hw->priv; | |
1104 | int err = 0, i; | |
1105 | u8 ktype; | |
1106 | ||
1107 | if (ar->disable_offload || !vif) | |
1108 | return -EOPNOTSUPP; | |
1109 | ||
1110 | /* | |
1111 | * We have to fall back to software encryption, whenever | |
1112 | * the user choose to participates in an IBSS or is connected | |
1113 | * to more than one network. | |
1114 | * | |
1115 | * This is very unfortunate, because some machines cannot handle | |
1116 | * the high througput speed in 802.11n networks. | |
1117 | */ | |
1118 | ||
66cb54bd AK |
1119 | if (!is_main_vif(ar, vif)) { |
1120 | mutex_lock(&ar->mutex); | |
fe8ee9ad | 1121 | goto err_softw; |
66cb54bd | 1122 | } |
fe8ee9ad CL |
1123 | |
1124 | /* | |
1125 | * While the hardware supports *catch-all* key, for offloading | |
1126 | * group-key en-/de-cryption. The way of how the hardware | |
1127 | * decides which keyId maps to which key, remains a mystery... | |
1128 | */ | |
1129 | if ((vif->type != NL80211_IFTYPE_STATION && | |
1130 | vif->type != NL80211_IFTYPE_ADHOC) && | |
1131 | !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) | |
1132 | return -EOPNOTSUPP; | |
1133 | ||
1134 | switch (key->cipher) { | |
1135 | case WLAN_CIPHER_SUITE_WEP40: | |
1136 | ktype = AR9170_ENC_ALG_WEP64; | |
1137 | break; | |
1138 | case WLAN_CIPHER_SUITE_WEP104: | |
1139 | ktype = AR9170_ENC_ALG_WEP128; | |
1140 | break; | |
1141 | case WLAN_CIPHER_SUITE_TKIP: | |
1142 | ktype = AR9170_ENC_ALG_TKIP; | |
1143 | break; | |
1144 | case WLAN_CIPHER_SUITE_CCMP: | |
1145 | ktype = AR9170_ENC_ALG_AESCCMP; | |
1146 | break; | |
1147 | default: | |
1148 | return -EOPNOTSUPP; | |
1149 | } | |
1150 | ||
1151 | mutex_lock(&ar->mutex); | |
1152 | if (cmd == SET_KEY) { | |
1153 | if (!IS_STARTED(ar)) { | |
1154 | err = -EOPNOTSUPP; | |
1155 | goto out; | |
1156 | } | |
1157 | ||
1158 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { | |
1159 | sta = NULL; | |
1160 | ||
1161 | i = 64 + key->keyidx; | |
1162 | } else { | |
1163 | for (i = 0; i < 64; i++) | |
1164 | if (!(ar->usedkeys & BIT(i))) | |
1165 | break; | |
1166 | if (i == 64) | |
1167 | goto err_softw; | |
1168 | } | |
1169 | ||
1170 | key->hw_key_idx = i; | |
1171 | ||
1172 | err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL, | |
1173 | ktype, 0, key->key, | |
1174 | min_t(u8, 16, key->keylen)); | |
1175 | if (err) | |
1176 | goto out; | |
1177 | ||
1178 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
1179 | err = carl9170_upload_key(ar, i, sta ? sta->addr : | |
1180 | NULL, ktype, 1, | |
1181 | key->key + 16, 16); | |
1182 | if (err) | |
1183 | goto out; | |
1184 | ||
1185 | /* | |
1186 | * hardware is not capable generating MMIC | |
1187 | * of fragmented frames! | |
1188 | */ | |
1189 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
1190 | } | |
1191 | ||
1192 | if (i < 64) | |
1193 | ar->usedkeys |= BIT(i); | |
1194 | ||
1195 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
1196 | } else { | |
1197 | if (!IS_STARTED(ar)) { | |
1198 | /* The device is gone... together with the key ;-) */ | |
1199 | err = 0; | |
1200 | goto out; | |
1201 | } | |
1202 | ||
1203 | if (key->hw_key_idx < 64) { | |
1204 | ar->usedkeys &= ~BIT(key->hw_key_idx); | |
1205 | } else { | |
1206 | err = carl9170_upload_key(ar, key->hw_key_idx, NULL, | |
1207 | AR9170_ENC_ALG_NONE, 0, | |
1208 | NULL, 0); | |
1209 | if (err) | |
1210 | goto out; | |
1211 | ||
1212 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
1213 | err = carl9170_upload_key(ar, key->hw_key_idx, | |
1214 | NULL, | |
1215 | AR9170_ENC_ALG_NONE, | |
1216 | 1, NULL, 0); | |
1217 | if (err) | |
1218 | goto out; | |
1219 | } | |
1220 | ||
1221 | } | |
1222 | ||
1223 | err = carl9170_disable_key(ar, key->hw_key_idx); | |
1224 | if (err) | |
1225 | goto out; | |
1226 | } | |
1227 | ||
1228 | out: | |
1229 | mutex_unlock(&ar->mutex); | |
1230 | return err; | |
1231 | ||
1232 | err_softw: | |
1233 | if (!ar->rx_software_decryption) { | |
1234 | ar->rx_software_decryption = true; | |
1235 | carl9170_set_operating_mode(ar); | |
1236 | } | |
1237 | mutex_unlock(&ar->mutex); | |
1238 | return -ENOSPC; | |
1239 | } | |
1240 | ||
1241 | static int carl9170_op_sta_add(struct ieee80211_hw *hw, | |
1242 | struct ieee80211_vif *vif, | |
1243 | struct ieee80211_sta *sta) | |
1244 | { | |
1245 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1246 | unsigned int i; | |
1247 | ||
caf1eae2 CL |
1248 | atomic_set(&sta_info->pending_frames, 0); |
1249 | ||
fe8ee9ad CL |
1250 | if (sta->ht_cap.ht_supported) { |
1251 | if (sta->ht_cap.ampdu_density > 6) { | |
1252 | /* | |
1253 | * HW does support 16us AMPDU density. | |
1254 | * No HT-Xmit for station. | |
1255 | */ | |
1256 | ||
1257 | return 0; | |
1258 | } | |
1259 | ||
1260 | for (i = 0; i < CARL9170_NUM_TID; i++) | |
2cfa5a04 | 1261 | RCU_INIT_POINTER(sta_info->agg[i], NULL); |
fe8ee9ad CL |
1262 | |
1263 | sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor); | |
1264 | sta_info->ht_sta = true; | |
1265 | } | |
1266 | ||
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static int carl9170_op_sta_remove(struct ieee80211_hw *hw, | |
1271 | struct ieee80211_vif *vif, | |
1272 | struct ieee80211_sta *sta) | |
1273 | { | |
1274 | struct ar9170 *ar = hw->priv; | |
1275 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1276 | unsigned int i; | |
1277 | bool cleanup = false; | |
1278 | ||
1279 | if (sta->ht_cap.ht_supported) { | |
1280 | ||
1281 | sta_info->ht_sta = false; | |
1282 | ||
1283 | rcu_read_lock(); | |
1284 | for (i = 0; i < CARL9170_NUM_TID; i++) { | |
1285 | struct carl9170_sta_tid *tid_info; | |
1286 | ||
1287 | tid_info = rcu_dereference(sta_info->agg[i]); | |
2cfa5a04 | 1288 | RCU_INIT_POINTER(sta_info->agg[i], NULL); |
fe8ee9ad CL |
1289 | |
1290 | if (!tid_info) | |
1291 | continue; | |
1292 | ||
1293 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1294 | if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) | |
1295 | tid_info->state = CARL9170_TID_STATE_SHUTDOWN; | |
1296 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
1297 | cleanup = true; | |
1298 | } | |
1299 | rcu_read_unlock(); | |
1300 | ||
1301 | if (cleanup) | |
1302 | carl9170_ampdu_gc(ar); | |
1303 | } | |
1304 | ||
1305 | return 0; | |
1306 | } | |
1307 | ||
8a3a3c85 EP |
1308 | static int carl9170_op_conf_tx(struct ieee80211_hw *hw, |
1309 | struct ieee80211_vif *vif, u16 queue, | |
fe8ee9ad CL |
1310 | const struct ieee80211_tx_queue_params *param) |
1311 | { | |
1312 | struct ar9170 *ar = hw->priv; | |
1313 | int ret; | |
1314 | ||
1315 | mutex_lock(&ar->mutex); | |
1316 | if (queue < ar->hw->queues) { | |
1317 | memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param)); | |
1318 | ret = carl9170_set_qos(ar); | |
1319 | } else { | |
1320 | ret = -EINVAL; | |
1321 | } | |
1322 | ||
1323 | mutex_unlock(&ar->mutex); | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1327 | static void carl9170_ampdu_work(struct work_struct *work) | |
1328 | { | |
1329 | struct ar9170 *ar = container_of(work, struct ar9170, | |
1330 | ampdu_work); | |
1331 | ||
1332 | if (!IS_STARTED(ar)) | |
1333 | return; | |
1334 | ||
1335 | mutex_lock(&ar->mutex); | |
1336 | carl9170_ampdu_gc(ar); | |
1337 | mutex_unlock(&ar->mutex); | |
1338 | } | |
1339 | ||
1340 | static int carl9170_op_ampdu_action(struct ieee80211_hw *hw, | |
1341 | struct ieee80211_vif *vif, | |
1342 | enum ieee80211_ampdu_mlme_action action, | |
1343 | struct ieee80211_sta *sta, | |
0b01f030 | 1344 | u16 tid, u16 *ssn, u8 buf_size) |
fe8ee9ad CL |
1345 | { |
1346 | struct ar9170 *ar = hw->priv; | |
1347 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; | |
1348 | struct carl9170_sta_tid *tid_info; | |
1349 | ||
1350 | if (modparam_noht) | |
1351 | return -EOPNOTSUPP; | |
1352 | ||
1353 | switch (action) { | |
1354 | case IEEE80211_AMPDU_TX_START: | |
9c655c8b | 1355 | if (!sta_info->ht_sta) |
fe8ee9ad CL |
1356 | return -EOPNOTSUPP; |
1357 | ||
1358 | rcu_read_lock(); | |
1359 | if (rcu_dereference(sta_info->agg[tid])) { | |
1360 | rcu_read_unlock(); | |
1361 | return -EBUSY; | |
1362 | } | |
1363 | ||
1364 | tid_info = kzalloc(sizeof(struct carl9170_sta_tid), | |
1365 | GFP_ATOMIC); | |
1366 | if (!tid_info) { | |
1367 | rcu_read_unlock(); | |
1368 | return -ENOMEM; | |
1369 | } | |
1370 | ||
1371 | tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn); | |
1372 | tid_info->state = CARL9170_TID_STATE_PROGRESS; | |
1373 | tid_info->tid = tid; | |
1374 | tid_info->max = sta_info->ampdu_max_len; | |
1375 | ||
1376 | INIT_LIST_HEAD(&tid_info->list); | |
1377 | INIT_LIST_HEAD(&tid_info->tmp_list); | |
1378 | skb_queue_head_init(&tid_info->queue); | |
1379 | spin_lock_init(&tid_info->lock); | |
1380 | ||
1381 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1382 | ar->tx_ampdu_list_len++; | |
1383 | list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list); | |
1384 | rcu_assign_pointer(sta_info->agg[tid], tid_info); | |
1385 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
1386 | rcu_read_unlock(); | |
1387 | ||
1388 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1389 | break; | |
1390 | ||
1391 | case IEEE80211_AMPDU_TX_STOP: | |
1392 | rcu_read_lock(); | |
1393 | tid_info = rcu_dereference(sta_info->agg[tid]); | |
1394 | if (tid_info) { | |
1395 | spin_lock_bh(&ar->tx_ampdu_list_lock); | |
1396 | if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN) | |
1397 | tid_info->state = CARL9170_TID_STATE_SHUTDOWN; | |
1398 | spin_unlock_bh(&ar->tx_ampdu_list_lock); | |
1399 | } | |
1400 | ||
2cfa5a04 | 1401 | RCU_INIT_POINTER(sta_info->agg[tid], NULL); |
fe8ee9ad CL |
1402 | rcu_read_unlock(); |
1403 | ||
1404 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1405 | ieee80211_queue_work(ar->hw, &ar->ampdu_work); | |
1406 | break; | |
1407 | ||
1408 | case IEEE80211_AMPDU_TX_OPERATIONAL: | |
1409 | rcu_read_lock(); | |
1410 | tid_info = rcu_dereference(sta_info->agg[tid]); | |
1411 | ||
1412 | sta_info->stats[tid].clear = true; | |
24047e2c | 1413 | sta_info->stats[tid].req = false; |
fe8ee9ad CL |
1414 | |
1415 | if (tid_info) { | |
1416 | bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE); | |
1417 | tid_info->state = CARL9170_TID_STATE_IDLE; | |
1418 | } | |
1419 | rcu_read_unlock(); | |
1420 | ||
1421 | if (WARN_ON_ONCE(!tid_info)) | |
1422 | return -EFAULT; | |
1423 | ||
1424 | break; | |
1425 | ||
1426 | case IEEE80211_AMPDU_RX_START: | |
1427 | case IEEE80211_AMPDU_RX_STOP: | |
1428 | /* Handled by hardware */ | |
1429 | break; | |
1430 | ||
1431 | default: | |
1432 | return -EOPNOTSUPP; | |
1433 | } | |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | #ifdef CONFIG_CARL9170_WPC | |
1439 | static int carl9170_register_wps_button(struct ar9170 *ar) | |
1440 | { | |
1441 | struct input_dev *input; | |
1442 | int err; | |
1443 | ||
1444 | if (!(ar->features & CARL9170_WPS_BUTTON)) | |
1445 | return 0; | |
1446 | ||
1447 | input = input_allocate_device(); | |
1448 | if (!input) | |
1449 | return -ENOMEM; | |
1450 | ||
1451 | snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button", | |
1452 | wiphy_name(ar->hw->wiphy)); | |
1453 | ||
1454 | snprintf(ar->wps.phys, sizeof(ar->wps.phys), | |
1455 | "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy)); | |
1456 | ||
1457 | input->name = ar->wps.name; | |
1458 | input->phys = ar->wps.phys; | |
1459 | input->id.bustype = BUS_USB; | |
1460 | input->dev.parent = &ar->hw->wiphy->dev; | |
1461 | ||
1462 | input_set_capability(input, EV_KEY, KEY_WPS_BUTTON); | |
1463 | ||
1464 | err = input_register_device(input); | |
1465 | if (err) { | |
1466 | input_free_device(input); | |
1467 | return err; | |
1468 | } | |
1469 | ||
1470 | ar->wps.pbc = input; | |
1471 | return 0; | |
1472 | } | |
1473 | #endif /* CONFIG_CARL9170_WPC */ | |
1474 | ||
00044f17 CL |
1475 | #ifdef CONFIG_CARL9170_HWRNG |
1476 | static int carl9170_rng_get(struct ar9170 *ar) | |
1477 | { | |
1478 | ||
1479 | #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32)) | |
1480 | #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN) | |
1481 | ||
1482 | static const __le32 rng_load[RW] = { | |
1483 | [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)}; | |
1484 | ||
1485 | u32 buf[RW]; | |
1486 | ||
1487 | unsigned int i, off = 0, transfer, count; | |
1488 | int err; | |
1489 | ||
1490 | BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN); | |
1491 | ||
1492 | if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized) | |
1493 | return -EAGAIN; | |
1494 | ||
1495 | count = ARRAY_SIZE(ar->rng.cache); | |
1496 | while (count) { | |
1497 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, | |
1498 | RB, (u8 *) rng_load, | |
1499 | RB, (u8 *) buf); | |
1500 | if (err) | |
1501 | return err; | |
1502 | ||
1503 | transfer = min_t(unsigned int, count, RW); | |
1504 | for (i = 0; i < transfer; i++) | |
1505 | ar->rng.cache[off + i] = buf[i]; | |
1506 | ||
1507 | off += transfer; | |
1508 | count -= transfer; | |
1509 | } | |
1510 | ||
1511 | ar->rng.cache_idx = 0; | |
1512 | ||
1513 | #undef RW | |
1514 | #undef RB | |
1515 | return 0; | |
1516 | } | |
1517 | ||
1518 | static int carl9170_rng_read(struct hwrng *rng, u32 *data) | |
1519 | { | |
1520 | struct ar9170 *ar = (struct ar9170 *)rng->priv; | |
1521 | int ret = -EIO; | |
1522 | ||
1523 | mutex_lock(&ar->mutex); | |
1524 | if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) { | |
1525 | ret = carl9170_rng_get(ar); | |
1526 | if (ret) { | |
1527 | mutex_unlock(&ar->mutex); | |
1528 | return ret; | |
1529 | } | |
1530 | } | |
1531 | ||
1532 | *data = ar->rng.cache[ar->rng.cache_idx++]; | |
1533 | mutex_unlock(&ar->mutex); | |
1534 | ||
1535 | return sizeof(u16); | |
1536 | } | |
1537 | ||
1538 | static void carl9170_unregister_hwrng(struct ar9170 *ar) | |
1539 | { | |
1540 | if (ar->rng.initialized) { | |
1541 | hwrng_unregister(&ar->rng.rng); | |
1542 | ar->rng.initialized = false; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | static int carl9170_register_hwrng(struct ar9170 *ar) | |
1547 | { | |
1548 | int err; | |
1549 | ||
1550 | snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name), | |
1551 | "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy)); | |
1552 | ar->rng.rng.name = ar->rng.name; | |
1553 | ar->rng.rng.data_read = carl9170_rng_read; | |
1554 | ar->rng.rng.priv = (unsigned long)ar; | |
1555 | ||
1556 | if (WARN_ON(ar->rng.initialized)) | |
1557 | return -EALREADY; | |
1558 | ||
1559 | err = hwrng_register(&ar->rng.rng); | |
1560 | if (err) { | |
1561 | dev_err(&ar->udev->dev, "Failed to register the random " | |
1562 | "number generator (%d)\n", err); | |
1563 | return err; | |
1564 | } | |
1565 | ||
1566 | ar->rng.initialized = true; | |
1567 | ||
1568 | err = carl9170_rng_get(ar); | |
1569 | if (err) { | |
1570 | carl9170_unregister_hwrng(ar); | |
1571 | return err; | |
1572 | } | |
1573 | ||
1574 | return 0; | |
1575 | } | |
1576 | #endif /* CONFIG_CARL9170_HWRNG */ | |
1577 | ||
fe8ee9ad CL |
1578 | static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx, |
1579 | struct survey_info *survey) | |
1580 | { | |
1581 | struct ar9170 *ar = hw->priv; | |
acf17712 CL |
1582 | struct ieee80211_channel *chan; |
1583 | struct ieee80211_supported_band *band; | |
1584 | int err, b, i; | |
fe8ee9ad | 1585 | |
acf17712 CL |
1586 | chan = ar->channel; |
1587 | if (!chan) | |
1588 | return -ENODEV; | |
fe8ee9ad | 1589 | |
acf17712 CL |
1590 | if (idx == chan->hw_value) { |
1591 | mutex_lock(&ar->mutex); | |
1592 | err = carl9170_update_survey(ar, false, true); | |
1593 | mutex_unlock(&ar->mutex); | |
1594 | if (err) | |
1595 | return err; | |
1596 | } | |
fe8ee9ad | 1597 | |
acf17712 CL |
1598 | for (b = 0; b < IEEE80211_NUM_BANDS; b++) { |
1599 | band = ar->hw->wiphy->bands[b]; | |
1600 | ||
1601 | if (!band) | |
1602 | continue; | |
1603 | ||
1604 | for (i = 0; i < band->n_channels; i++) { | |
1605 | if (band->channels[i].hw_value == idx) { | |
1606 | chan = &band->channels[i]; | |
1607 | goto found; | |
1608 | } | |
1609 | } | |
1610 | } | |
1611 | return -ENOENT; | |
1612 | ||
1613 | found: | |
1614 | memcpy(survey, &ar->survey[idx], sizeof(*survey)); | |
1615 | ||
1616 | survey->channel = chan; | |
fe8ee9ad | 1617 | survey->filled = SURVEY_INFO_NOISE_DBM; |
acf17712 CL |
1618 | |
1619 | if (ar->channel == chan) | |
1620 | survey->filled |= SURVEY_INFO_IN_USE; | |
1621 | ||
1622 | if (ar->fw.hw_counters) { | |
1623 | survey->filled |= SURVEY_INFO_CHANNEL_TIME | | |
1624 | SURVEY_INFO_CHANNEL_TIME_BUSY | | |
1625 | SURVEY_INFO_CHANNEL_TIME_TX; | |
1626 | } | |
1627 | ||
fe8ee9ad CL |
1628 | return 0; |
1629 | } | |
1630 | ||
1631 | static void carl9170_op_flush(struct ieee80211_hw *hw, bool drop) | |
1632 | { | |
1633 | struct ar9170 *ar = hw->priv; | |
1634 | unsigned int vid; | |
1635 | ||
1636 | mutex_lock(&ar->mutex); | |
1637 | for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num) | |
1638 | carl9170_flush_cab(ar, vid); | |
1639 | ||
1640 | carl9170_flush(ar, drop); | |
1641 | mutex_unlock(&ar->mutex); | |
1642 | } | |
1643 | ||
1644 | static int carl9170_op_get_stats(struct ieee80211_hw *hw, | |
1645 | struct ieee80211_low_level_stats *stats) | |
1646 | { | |
1647 | struct ar9170 *ar = hw->priv; | |
1648 | ||
1649 | memset(stats, 0, sizeof(*stats)); | |
1650 | stats->dot11ACKFailureCount = ar->tx_ack_failures; | |
1651 | stats->dot11FCSErrorCount = ar->tx_fcs_errors; | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static void carl9170_op_sta_notify(struct ieee80211_hw *hw, | |
1656 | struct ieee80211_vif *vif, | |
1657 | enum sta_notify_cmd cmd, | |
1658 | struct ieee80211_sta *sta) | |
1659 | { | |
fe8ee9ad | 1660 | struct carl9170_sta_info *sta_info = (void *) sta->drv_priv; |
fe8ee9ad CL |
1661 | |
1662 | switch (cmd) { | |
1663 | case STA_NOTIFY_SLEEP: | |
caf1eae2 CL |
1664 | sta_info->sleeping = true; |
1665 | if (atomic_read(&sta_info->pending_frames)) | |
1666 | ieee80211_sta_block_awake(hw, sta, true); | |
fe8ee9ad CL |
1667 | break; |
1668 | ||
1669 | case STA_NOTIFY_AWAKE: | |
caf1eae2 | 1670 | sta_info->sleeping = false; |
fe8ee9ad CL |
1671 | break; |
1672 | } | |
1673 | } | |
1674 | ||
69f7235f CL |
1675 | static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw) |
1676 | { | |
1677 | struct ar9170 *ar = hw->priv; | |
1678 | ||
1679 | return !!atomic_read(&ar->tx_total_queued); | |
1680 | } | |
1681 | ||
fe8ee9ad CL |
1682 | static const struct ieee80211_ops carl9170_ops = { |
1683 | .start = carl9170_op_start, | |
1684 | .stop = carl9170_op_stop, | |
1685 | .tx = carl9170_op_tx, | |
1686 | .flush = carl9170_op_flush, | |
1687 | .add_interface = carl9170_op_add_interface, | |
1688 | .remove_interface = carl9170_op_remove_interface, | |
1689 | .config = carl9170_op_config, | |
1690 | .prepare_multicast = carl9170_op_prepare_multicast, | |
1691 | .configure_filter = carl9170_op_configure_filter, | |
1692 | .conf_tx = carl9170_op_conf_tx, | |
1693 | .bss_info_changed = carl9170_op_bss_info_changed, | |
1694 | .get_tsf = carl9170_op_get_tsf, | |
1695 | .set_key = carl9170_op_set_key, | |
1696 | .sta_add = carl9170_op_sta_add, | |
1697 | .sta_remove = carl9170_op_sta_remove, | |
1698 | .sta_notify = carl9170_op_sta_notify, | |
1699 | .get_survey = carl9170_op_get_survey, | |
1700 | .get_stats = carl9170_op_get_stats, | |
1701 | .ampdu_action = carl9170_op_ampdu_action, | |
69f7235f | 1702 | .tx_frames_pending = carl9170_tx_frames_pending, |
fe8ee9ad CL |
1703 | }; |
1704 | ||
1705 | void *carl9170_alloc(size_t priv_size) | |
1706 | { | |
1707 | struct ieee80211_hw *hw; | |
1708 | struct ar9170 *ar; | |
1709 | struct sk_buff *skb; | |
1710 | int i; | |
1711 | ||
1712 | /* | |
1713 | * this buffer is used for rx stream reconstruction. | |
1714 | * Under heavy load this device (or the transport layer?) | |
1715 | * tends to split the streams into separate rx descriptors. | |
1716 | */ | |
1717 | ||
1718 | skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL); | |
1719 | if (!skb) | |
1720 | goto err_nomem; | |
1721 | ||
1722 | hw = ieee80211_alloc_hw(priv_size, &carl9170_ops); | |
1723 | if (!hw) | |
1724 | goto err_nomem; | |
1725 | ||
1726 | ar = hw->priv; | |
1727 | ar->hw = hw; | |
1728 | ar->rx_failover = skb; | |
1729 | ||
1730 | memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head)); | |
1731 | ar->rx_has_plcp = false; | |
1732 | ||
1733 | /* | |
1734 | * Here's a hidden pitfall! | |
1735 | * | |
1736 | * All 4 AC queues work perfectly well under _legacy_ operation. | |
1737 | * However as soon as aggregation is enabled, the traffic flow | |
1738 | * gets very bumpy. Therefore we have to _switch_ to a | |
1739 | * software AC with a single HW queue. | |
1740 | */ | |
1741 | hw->queues = __AR9170_NUM_TXQ; | |
1742 | ||
1743 | mutex_init(&ar->mutex); | |
1744 | spin_lock_init(&ar->beacon_lock); | |
1745 | spin_lock_init(&ar->cmd_lock); | |
1746 | spin_lock_init(&ar->tx_stats_lock); | |
1747 | spin_lock_init(&ar->tx_ampdu_list_lock); | |
1748 | spin_lock_init(&ar->mem_lock); | |
1749 | spin_lock_init(&ar->state_lock); | |
1750 | atomic_set(&ar->pending_restarts, 0); | |
1751 | ar->vifs = 0; | |
1752 | for (i = 0; i < ar->hw->queues; i++) { | |
1753 | skb_queue_head_init(&ar->tx_status[i]); | |
1754 | skb_queue_head_init(&ar->tx_pending[i]); | |
1755 | } | |
1756 | INIT_WORK(&ar->ps_work, carl9170_ps_work); | |
e4a668c5 | 1757 | INIT_WORK(&ar->ping_work, carl9170_ping_work); |
fe8ee9ad CL |
1758 | INIT_WORK(&ar->restart_work, carl9170_restart_work); |
1759 | INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work); | |
acf17712 | 1760 | INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work); |
fe8ee9ad CL |
1761 | INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor); |
1762 | INIT_LIST_HEAD(&ar->tx_ampdu_list); | |
1763 | rcu_assign_pointer(ar->tx_ampdu_iter, | |
1764 | (struct carl9170_sta_tid *) &ar->tx_ampdu_list); | |
1765 | ||
1766 | bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num); | |
1767 | INIT_LIST_HEAD(&ar->vif_list); | |
1768 | init_completion(&ar->tx_flush); | |
1769 | ||
df64962f CL |
1770 | /* firmware decides which modes we support */ |
1771 | hw->wiphy->interface_modes = 0; | |
fe8ee9ad CL |
1772 | |
1773 | hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS | | |
1774 | IEEE80211_HW_REPORTS_TX_ACK_STATUS | | |
1775 | IEEE80211_HW_SUPPORTS_PS | | |
1776 | IEEE80211_HW_PS_NULLFUNC_STACK | | |
f3716fd7 | 1777 | IEEE80211_HW_NEED_DTIM_PERIOD | |
fe8ee9ad CL |
1778 | IEEE80211_HW_SIGNAL_DBM; |
1779 | ||
1780 | if (!modparam_noht) { | |
1781 | /* | |
1782 | * see the comment above, why we allow the user | |
1783 | * to disable HT by a module parameter. | |
1784 | */ | |
1785 | hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION; | |
1786 | } | |
1787 | ||
1788 | hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe); | |
1789 | hw->sta_data_size = sizeof(struct carl9170_sta_info); | |
1790 | hw->vif_data_size = sizeof(struct carl9170_vif_info); | |
1791 | ||
1792 | hw->max_rates = CARL9170_TX_MAX_RATES; | |
1793 | hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES; | |
1794 | ||
1795 | for (i = 0; i < ARRAY_SIZE(ar->noise); i++) | |
1796 | ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */ | |
1797 | ||
1798 | hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
1799 | return ar; | |
1800 | ||
1801 | err_nomem: | |
1802 | kfree_skb(skb); | |
1803 | return ERR_PTR(-ENOMEM); | |
1804 | } | |
1805 | ||
1806 | static int carl9170_read_eeprom(struct ar9170 *ar) | |
1807 | { | |
1808 | #define RW 8 /* number of words to read at once */ | |
1809 | #define RB (sizeof(u32) * RW) | |
1810 | u8 *eeprom = (void *)&ar->eeprom; | |
1811 | __le32 offsets[RW]; | |
1812 | int i, j, err; | |
1813 | ||
1814 | BUILD_BUG_ON(sizeof(ar->eeprom) & 3); | |
1815 | ||
1816 | BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4); | |
1817 | #ifndef __CHECKER__ | |
1818 | /* don't want to handle trailing remains */ | |
1819 | BUILD_BUG_ON(sizeof(ar->eeprom) % RB); | |
1820 | #endif | |
1821 | ||
3f29c522 | 1822 | for (i = 0; i < sizeof(ar->eeprom) / RB; i++) { |
fe8ee9ad CL |
1823 | for (j = 0; j < RW; j++) |
1824 | offsets[j] = cpu_to_le32(AR9170_EEPROM_START + | |
1825 | RB * i + 4 * j); | |
1826 | ||
1827 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, | |
1828 | RB, (u8 *) &offsets, | |
1829 | RB, eeprom + RB * i); | |
1830 | if (err) | |
1831 | return err; | |
1832 | } | |
1833 | ||
1834 | #undef RW | |
1835 | #undef RB | |
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | static int carl9170_parse_eeprom(struct ar9170 *ar) | |
1840 | { | |
1841 | struct ath_regulatory *regulatory = &ar->common.regulatory; | |
1842 | unsigned int rx_streams, tx_streams, tx_params = 0; | |
1843 | int bands = 0; | |
acf17712 | 1844 | int chans = 0; |
fe8ee9ad CL |
1845 | |
1846 | if (ar->eeprom.length == cpu_to_le16(0xffff)) | |
1847 | return -ENODATA; | |
1848 | ||
1849 | rx_streams = hweight8(ar->eeprom.rx_mask); | |
1850 | tx_streams = hweight8(ar->eeprom.tx_mask); | |
1851 | ||
1852 | if (rx_streams != tx_streams) { | |
1853 | tx_params = IEEE80211_HT_MCS_TX_RX_DIFF; | |
1854 | ||
1855 | WARN_ON(!(tx_streams >= 1 && tx_streams <= | |
1856 | IEEE80211_HT_MCS_TX_MAX_STREAMS)); | |
1857 | ||
1858 | tx_params = (tx_streams - 1) << | |
1859 | IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; | |
1860 | ||
1861 | carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params; | |
1862 | carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params; | |
1863 | } | |
1864 | ||
1865 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) { | |
1866 | ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = | |
1867 | &carl9170_band_2GHz; | |
acf17712 | 1868 | chans += carl9170_band_2GHz.n_channels; |
fe8ee9ad CL |
1869 | bands++; |
1870 | } | |
1871 | if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) { | |
1872 | ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = | |
1873 | &carl9170_band_5GHz; | |
acf17712 | 1874 | chans += carl9170_band_5GHz.n_channels; |
fe8ee9ad CL |
1875 | bands++; |
1876 | } | |
1877 | ||
acf17712 CL |
1878 | if (!bands) |
1879 | return -EINVAL; | |
1880 | ||
1881 | ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL); | |
1882 | if (!ar->survey) | |
1883 | return -ENOMEM; | |
1884 | ar->num_channels = chans; | |
1885 | ||
fe8ee9ad CL |
1886 | /* |
1887 | * I measured this, a bandswitch takes roughly | |
1888 | * 135 ms and a frequency switch about 80. | |
1889 | * | |
1890 | * FIXME: measure these values again once EEPROM settings | |
1891 | * are used, that will influence them! | |
1892 | */ | |
1893 | if (bands == 2) | |
1894 | ar->hw->channel_change_time = 135 * 1000; | |
1895 | else | |
1896 | ar->hw->channel_change_time = 80 * 1000; | |
1897 | ||
1898 | regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]); | |
fe8ee9ad CL |
1899 | |
1900 | /* second part of wiphy init */ | |
1901 | SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address); | |
1902 | ||
acf17712 | 1903 | return 0; |
fe8ee9ad CL |
1904 | } |
1905 | ||
1906 | static int carl9170_reg_notifier(struct wiphy *wiphy, | |
1907 | struct regulatory_request *request) | |
1908 | { | |
1909 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); | |
1910 | struct ar9170 *ar = hw->priv; | |
1911 | ||
1912 | return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory); | |
1913 | } | |
1914 | ||
1915 | int carl9170_register(struct ar9170 *ar) | |
1916 | { | |
1917 | struct ath_regulatory *regulatory = &ar->common.regulatory; | |
1918 | int err = 0, i; | |
1919 | ||
1920 | if (WARN_ON(ar->mem_bitmap)) | |
1921 | return -EINVAL; | |
1922 | ||
1923 | ar->mem_bitmap = kzalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG) * | |
1924 | sizeof(unsigned long), GFP_KERNEL); | |
1925 | ||
1926 | if (!ar->mem_bitmap) | |
1927 | return -ENOMEM; | |
1928 | ||
1929 | /* try to read EEPROM, init MAC addr */ | |
1930 | err = carl9170_read_eeprom(ar); | |
1931 | if (err) | |
1932 | return err; | |
1933 | ||
1934 | err = carl9170_fw_fix_eeprom(ar); | |
1935 | if (err) | |
1936 | return err; | |
1937 | ||
1938 | err = carl9170_parse_eeprom(ar); | |
1939 | if (err) | |
1940 | return err; | |
1941 | ||
1942 | err = ath_regd_init(regulatory, ar->hw->wiphy, | |
1943 | carl9170_reg_notifier); | |
1944 | if (err) | |
1945 | return err; | |
1946 | ||
1947 | if (modparam_noht) { | |
1948 | carl9170_band_2GHz.ht_cap.ht_supported = false; | |
1949 | carl9170_band_5GHz.ht_cap.ht_supported = false; | |
1950 | } | |
1951 | ||
1952 | for (i = 0; i < ar->fw.vif_num; i++) { | |
1953 | ar->vif_priv[i].id = i; | |
1954 | ar->vif_priv[i].vif = NULL; | |
1955 | } | |
1956 | ||
1957 | err = ieee80211_register_hw(ar->hw); | |
1958 | if (err) | |
1959 | return err; | |
1960 | ||
1961 | /* mac80211 interface is now registered */ | |
1962 | ar->registered = true; | |
1963 | ||
1964 | if (!ath_is_world_regd(regulatory)) | |
1965 | regulatory_hint(ar->hw->wiphy, regulatory->alpha2); | |
1966 | ||
1967 | #ifdef CONFIG_CARL9170_DEBUGFS | |
1968 | carl9170_debugfs_register(ar); | |
1969 | #endif /* CONFIG_CARL9170_DEBUGFS */ | |
1970 | ||
1971 | err = carl9170_led_init(ar); | |
1972 | if (err) | |
1973 | goto err_unreg; | |
1974 | ||
1975 | #ifdef CONFIG_CARL9170_LEDS | |
1976 | err = carl9170_led_register(ar); | |
1977 | if (err) | |
1978 | goto err_unreg; | |
8e7ce893 | 1979 | #endif /* CONFIG_CARL9170_LEDS */ |
fe8ee9ad CL |
1980 | |
1981 | #ifdef CONFIG_CARL9170_WPC | |
1982 | err = carl9170_register_wps_button(ar); | |
1983 | if (err) | |
1984 | goto err_unreg; | |
1985 | #endif /* CONFIG_CARL9170_WPC */ | |
1986 | ||
00044f17 CL |
1987 | #ifdef CONFIG_CARL9170_HWRNG |
1988 | err = carl9170_register_hwrng(ar); | |
1989 | if (err) | |
1990 | goto err_unreg; | |
1991 | #endif /* CONFIG_CARL9170_HWRNG */ | |
1992 | ||
fe8ee9ad CL |
1993 | dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n", |
1994 | wiphy_name(ar->hw->wiphy)); | |
1995 | ||
1996 | return 0; | |
1997 | ||
1998 | err_unreg: | |
1999 | carl9170_unregister(ar); | |
2000 | return err; | |
2001 | } | |
2002 | ||
2003 | void carl9170_unregister(struct ar9170 *ar) | |
2004 | { | |
2005 | if (!ar->registered) | |
2006 | return; | |
2007 | ||
2008 | ar->registered = false; | |
2009 | ||
2010 | #ifdef CONFIG_CARL9170_LEDS | |
2011 | carl9170_led_unregister(ar); | |
2012 | #endif /* CONFIG_CARL9170_LEDS */ | |
2013 | ||
2014 | #ifdef CONFIG_CARL9170_DEBUGFS | |
2015 | carl9170_debugfs_unregister(ar); | |
2016 | #endif /* CONFIG_CARL9170_DEBUGFS */ | |
2017 | ||
2018 | #ifdef CONFIG_CARL9170_WPC | |
2019 | if (ar->wps.pbc) { | |
2020 | input_unregister_device(ar->wps.pbc); | |
2021 | ar->wps.pbc = NULL; | |
2022 | } | |
2023 | #endif /* CONFIG_CARL9170_WPC */ | |
2024 | ||
00044f17 CL |
2025 | #ifdef CONFIG_CARL9170_HWRNG |
2026 | carl9170_unregister_hwrng(ar); | |
2027 | #endif /* CONFIG_CARL9170_HWRNG */ | |
2028 | ||
fe8ee9ad CL |
2029 | carl9170_cancel_worker(ar); |
2030 | cancel_work_sync(&ar->restart_work); | |
2031 | ||
2032 | ieee80211_unregister_hw(ar->hw); | |
2033 | } | |
2034 | ||
2035 | void carl9170_free(struct ar9170 *ar) | |
2036 | { | |
2037 | WARN_ON(ar->registered); | |
2038 | WARN_ON(IS_INITIALIZED(ar)); | |
2039 | ||
2040 | kfree_skb(ar->rx_failover); | |
2041 | ar->rx_failover = NULL; | |
2042 | ||
2043 | kfree(ar->mem_bitmap); | |
2044 | ar->mem_bitmap = NULL; | |
2045 | ||
acf17712 CL |
2046 | kfree(ar->survey); |
2047 | ar->survey = NULL; | |
2048 | ||
fe8ee9ad CL |
2049 | mutex_destroy(&ar->mutex); |
2050 | ||
2051 | ieee80211_free_hw(ar->hw); | |
2052 | } |