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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
51static int modparam_nohwcrypt;
52module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
53MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
54
55int modparam_noht;
56module_param_named(noht, modparam_noht, int, S_IRUGO);
57MODULE_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
65struct 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
96static 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
113static 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
169static 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
177static 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
185static 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
220static 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
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
240 carl9170_tx_status(ar, skb, false);
241 }
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
250static 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
277static 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) \
331do { \
332 queue.aifs = ai_fs; \
333 queue.cw_min = cwmin; \
334 queue.cw_max = cwmax; \
335 queue.txop = _txop; \
336} while (0)
337
338static 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 */
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);
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
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
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
416 ieee80211_wake_queues(ar->hw);
417 err = 0;
418
419out:
420 mutex_unlock(&ar->mutex);
421 return err;
422}
423
424static void carl9170_cancel_worker(struct ar9170 *ar)
425{
426 cancel_delayed_work_sync(&ar->tx_janitor);
427#ifdef CONFIG_CARL9170_LEDS
428 cancel_delayed_work_sync(&ar->led_work);
429#endif /* CONFIG_CARL9170_LEDS */
430 cancel_work_sync(&ar->ps_work);
431 cancel_work_sync(&ar->ping_work);
432 cancel_work_sync(&ar->ampdu_work);
433}
434
435static void carl9170_op_stop(struct ieee80211_hw *hw)
436{
437 struct ar9170 *ar = hw->priv;
438
439 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
440
441 ieee80211_stop_queues(ar->hw);
442
443 mutex_lock(&ar->mutex);
444 if (IS_ACCEPTING_CMD(ar)) {
445 rcu_assign_pointer(ar->beacon_iter, NULL);
446
447 carl9170_led_set_state(ar, 0);
448
449 /* stop DMA */
450 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
451 carl9170_usb_stop(ar);
452 }
453
454 carl9170_zap_queues(ar);
455 mutex_unlock(&ar->mutex);
456
457 carl9170_cancel_worker(ar);
458}
459
460static void carl9170_restart_work(struct work_struct *work)
461{
462 struct ar9170 *ar = container_of(work, struct ar9170,
463 restart_work);
464 int err;
465
466 ar->usedkeys = 0;
467 ar->filter_state = 0;
468 carl9170_cancel_worker(ar);
469
470 mutex_lock(&ar->mutex);
471 err = carl9170_usb_restart(ar);
472 if (net_ratelimit()) {
473 if (err) {
474 dev_err(&ar->udev->dev, "Failed to restart device "
475 " (%d).\n", err);
476 } else {
477 dev_info(&ar->udev->dev, "device restarted "
478 "successfully.\n");
479 }
480 }
481
482 carl9170_zap_queues(ar);
483 mutex_unlock(&ar->mutex);
484 if (!err) {
485 ar->restart_counter++;
486 atomic_set(&ar->pending_restarts, 0);
487
488 ieee80211_restart_hw(ar->hw);
489 } else {
490 /*
491 * The reset was unsuccessful and the device seems to
492 * be dead. But there's still one option: a low-level
493 * usb subsystem reset...
494 */
495
496 carl9170_usb_reset(ar);
497 }
498}
499
500void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
501{
502 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
503
504 /*
505 * Sometimes, an error can trigger several different reset events.
506 * By ignoring these *surplus* reset events, the device won't be
507 * killed again, right after it has recovered.
508 */
509 if (atomic_inc_return(&ar->pending_restarts) > 1) {
510 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
511 return;
512 }
513
514 ieee80211_stop_queues(ar->hw);
515
516 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
517
518 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
519 !WARN_ON(r >= __CARL9170_RR_LAST))
520 ar->last_reason = r;
521
522 if (!ar->registered)
523 return;
524
525 if (IS_ACCEPTING_CMD(ar) && !ar->needs_full_reset)
526 ieee80211_queue_work(ar->hw, &ar->restart_work);
527 else
528 carl9170_usb_reset(ar);
529
530 /*
531 * At this point, the device instance might have vanished/disabled.
532 * So, don't put any code which access the ar9170 struct
533 * without proper protection.
534 */
535}
536
537static void carl9170_ping_work(struct work_struct *work)
538{
539 struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
540 int err;
541
542 if (!IS_STARTED(ar))
543 return;
544
545 mutex_lock(&ar->mutex);
546 err = carl9170_echo_test(ar, 0xdeadbeef);
547 if (err)
548 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
549 mutex_unlock(&ar->mutex);
550}
551
552static int carl9170_init_interface(struct ar9170 *ar,
553 struct ieee80211_vif *vif)
554{
555 struct ath_common *common = &ar->common;
556 int err;
557
558 if (!vif) {
559 WARN_ON_ONCE(IS_STARTED(ar));
560 return 0;
561 }
562
563 memcpy(common->macaddr, vif->addr, ETH_ALEN);
564
565 if (modparam_nohwcrypt ||
566 ((vif->type != NL80211_IFTYPE_STATION) &&
567 (vif->type != NL80211_IFTYPE_AP))) {
568 ar->rx_software_decryption = true;
569 ar->disable_offload = true;
570 }
571
572 err = carl9170_set_operating_mode(ar);
573 return err;
574}
575
576static int carl9170_op_add_interface(struct ieee80211_hw *hw,
577 struct ieee80211_vif *vif)
578{
579 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
580 struct ieee80211_vif *main_vif;
581 struct ar9170 *ar = hw->priv;
582 int vif_id = -1, err = 0;
583
584 mutex_lock(&ar->mutex);
585 rcu_read_lock();
586 if (vif_priv->active) {
587 /*
588 * Skip the interface structure initialization,
589 * if the vif survived the _restart call.
590 */
591 vif_id = vif_priv->id;
592 vif_priv->enable_beacon = false;
593
594 spin_lock_bh(&ar->beacon_lock);
595 dev_kfree_skb_any(vif_priv->beacon);
596 vif_priv->beacon = NULL;
597 spin_unlock_bh(&ar->beacon_lock);
598
599 goto init;
600 }
601
602 main_vif = carl9170_get_main_vif(ar);
603
604 if (main_vif) {
605 switch (main_vif->type) {
606 case NL80211_IFTYPE_STATION:
607 if (vif->type == NL80211_IFTYPE_STATION)
608 break;
609
610 err = -EBUSY;
611 rcu_read_unlock();
612
613 goto unlock;
614
615 case NL80211_IFTYPE_AP:
616 if ((vif->type == NL80211_IFTYPE_STATION) ||
617 (vif->type == NL80211_IFTYPE_WDS) ||
618 (vif->type == NL80211_IFTYPE_AP))
619 break;
620
621 err = -EBUSY;
622 rcu_read_unlock();
623 goto unlock;
624
625 default:
626 rcu_read_unlock();
627 goto unlock;
628 }
629 }
630
631 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
632
633 if (vif_id < 0) {
634 rcu_read_unlock();
635
636 err = -ENOSPC;
637 goto unlock;
638 }
639
640 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
641
642 vif_priv->active = true;
643 vif_priv->id = vif_id;
644 vif_priv->enable_beacon = false;
645 ar->vifs++;
646 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
647 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
648
649init:
650 if (carl9170_get_main_vif(ar) == vif) {
651 rcu_assign_pointer(ar->beacon_iter, vif_priv);
652 rcu_read_unlock();
653
654 err = carl9170_init_interface(ar, vif);
655 if (err)
656 goto unlock;
657 } else {
658 rcu_read_unlock();
659 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
660
661 if (err)
662 goto unlock;
663 }
664
665 if (ar->fw.tx_seq_table) {
666 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
667 0);
668 if (err)
669 goto unlock;
670 }
671
672unlock:
673 if (err && (vif_id >= 0)) {
674 vif_priv->active = false;
675 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
676 ar->vifs--;
677 rcu_assign_pointer(ar->vif_priv[vif_id].vif, NULL);
678 list_del_rcu(&vif_priv->list);
679 mutex_unlock(&ar->mutex);
680 synchronize_rcu();
681 } else {
682 if (ar->vifs > 1)
683 ar->ps.off_override |= PS_OFF_VIF;
684
685 mutex_unlock(&ar->mutex);
686 }
687
688 return err;
689}
690
691static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
692 struct ieee80211_vif *vif)
693{
694 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
695 struct ieee80211_vif *main_vif;
696 struct ar9170 *ar = hw->priv;
697 unsigned int id;
698
699 mutex_lock(&ar->mutex);
700
701 if (WARN_ON_ONCE(!vif_priv->active))
702 goto unlock;
703
704 ar->vifs--;
705
706 rcu_read_lock();
707 main_vif = carl9170_get_main_vif(ar);
708
709 id = vif_priv->id;
710
711 vif_priv->active = false;
712 WARN_ON(vif_priv->enable_beacon);
713 vif_priv->enable_beacon = false;
714 list_del_rcu(&vif_priv->list);
715 rcu_assign_pointer(ar->vif_priv[id].vif, NULL);
716
717 if (vif == main_vif) {
718 rcu_read_unlock();
719
720 if (ar->vifs) {
721 WARN_ON(carl9170_init_interface(ar,
722 carl9170_get_main_vif(ar)));
723 } else {
724 carl9170_set_operating_mode(ar);
725 }
726 } else {
727 rcu_read_unlock();
728
729 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
730 }
731
732 carl9170_update_beacon(ar, false);
733 carl9170_flush_cab(ar, id);
734
735 spin_lock_bh(&ar->beacon_lock);
736 dev_kfree_skb_any(vif_priv->beacon);
737 vif_priv->beacon = NULL;
738 spin_unlock_bh(&ar->beacon_lock);
739
740 bitmap_release_region(&ar->vif_bitmap, id, 0);
741
742 carl9170_set_beacon_timers(ar);
743
744 if (ar->vifs == 1)
745 ar->ps.off_override &= ~PS_OFF_VIF;
746
747unlock:
748 mutex_unlock(&ar->mutex);
749
750 synchronize_rcu();
751}
752
753void carl9170_ps_check(struct ar9170 *ar)
754{
755 ieee80211_queue_work(ar->hw, &ar->ps_work);
756}
757
758/* caller must hold ar->mutex */
759static int carl9170_ps_update(struct ar9170 *ar)
760{
761 bool ps = false;
762 int err = 0;
763
764 if (!ar->ps.off_override)
765 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
766
767 if (ps != ar->ps.state) {
768 err = carl9170_powersave(ar, ps);
769 if (err)
770 return err;
771
772 if (ar->ps.state && !ps) {
773 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
774 ar->ps.last_action);
775 }
776
777 if (ps)
778 ar->ps.last_slept = jiffies;
779
780 ar->ps.last_action = jiffies;
781 ar->ps.state = ps;
782 }
783
784 return 0;
785}
786
787static void carl9170_ps_work(struct work_struct *work)
788{
789 struct ar9170 *ar = container_of(work, struct ar9170,
790 ps_work);
791 mutex_lock(&ar->mutex);
792 if (IS_STARTED(ar))
793 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
794 mutex_unlock(&ar->mutex);
795}
796
797
798static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
799{
800 struct ar9170 *ar = hw->priv;
801 int err = 0;
802
803 mutex_lock(&ar->mutex);
804 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
805 /* TODO */
806 err = 0;
807 }
808
809 if (changed & IEEE80211_CONF_CHANGE_PS) {
810 err = carl9170_ps_update(ar);
811 if (err)
812 goto out;
813 }
814
815 if (changed & IEEE80211_CONF_CHANGE_POWER) {
816 /* TODO */
817 err = 0;
818 }
819
820 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
821 /* TODO */
822 err = 0;
823 }
824
825 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
826 /* adjust slot time for 5 GHz */
827 err = carl9170_set_slot_time(ar);
828 if (err)
829 goto out;
830
831 err = carl9170_set_channel(ar, hw->conf.channel,
832 hw->conf.channel_type, CARL9170_RFI_NONE);
833 if (err)
834 goto out;
835
836 err = carl9170_set_dyn_sifs_ack(ar);
837 if (err)
838 goto out;
839
840 err = carl9170_set_rts_cts_rate(ar);
841 if (err)
842 goto out;
843 }
844
845out:
846 mutex_unlock(&ar->mutex);
847 return err;
848}
849
850static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
851 struct netdev_hw_addr_list *mc_list)
852{
853 struct netdev_hw_addr *ha;
854 u64 mchash;
855
856 /* always get broadcast frames */
857 mchash = 1ULL << (0xff >> 2);
858
859 netdev_hw_addr_list_for_each(ha, mc_list)
860 mchash |= 1ULL << (ha->addr[5] >> 2);
861
862 return mchash;
863}
864
865static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
866 unsigned int changed_flags,
867 unsigned int *new_flags,
868 u64 multicast)
869{
870 struct ar9170 *ar = hw->priv;
871
872 /* mask supported flags */
873 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
874
875 if (!IS_ACCEPTING_CMD(ar))
876 return;
877
878 mutex_lock(&ar->mutex);
879
880 ar->filter_state = *new_flags;
881 /*
882 * We can support more by setting the sniffer bit and
883 * then checking the error flags, later.
884 */
885
886 if (*new_flags & FIF_ALLMULTI)
887 multicast = ~0ULL;
888
889 if (multicast != ar->cur_mc_hash)
890 WARN_ON(carl9170_update_multicast(ar, multicast));
891
892 if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
893 ar->sniffer_enabled = !!(*new_flags &
894 (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS));
895
896 WARN_ON(carl9170_set_operating_mode(ar));
897 }
898
899 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
900 u32 rx_filter = 0;
901
902 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
903 rx_filter |= CARL9170_RX_FILTER_BAD;
904
905 if (!(*new_flags & FIF_CONTROL))
906 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
907
908 if (!(*new_flags & FIF_PSPOLL))
909 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
910
911 if (!(*new_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))) {
912 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
913 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
914 }
915
916 WARN_ON(carl9170_rx_filter(ar, rx_filter));
917 }
918
919 mutex_unlock(&ar->mutex);
920}
921
922
923static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
924 struct ieee80211_vif *vif,
925 struct ieee80211_bss_conf *bss_conf,
926 u32 changed)
927{
928 struct ar9170 *ar = hw->priv;
929 struct ath_common *common = &ar->common;
930 int err = 0;
931 struct carl9170_vif_info *vif_priv;
932 struct ieee80211_vif *main_vif;
933
934 mutex_lock(&ar->mutex);
935 vif_priv = (void *) vif->drv_priv;
936 main_vif = carl9170_get_main_vif(ar);
937 if (WARN_ON(!main_vif))
938 goto out;
939
940 if (changed & BSS_CHANGED_BEACON_ENABLED) {
941 struct carl9170_vif_info *iter;
942 int i = 0;
943
944 vif_priv->enable_beacon = bss_conf->enable_beacon;
945 rcu_read_lock();
946 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
947 if (iter->active && iter->enable_beacon)
948 i++;
949
950 }
951 rcu_read_unlock();
952
953 ar->beacon_enabled = i;
954 }
955
956 if (changed & BSS_CHANGED_BEACON) {
957 err = carl9170_update_beacon(ar, false);
958 if (err)
959 goto out;
960 }
961
962 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
963 BSS_CHANGED_BEACON_INT)) {
964
965 if (main_vif != vif) {
966 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
967 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
968 }
969
970 /*
971 * Therefore a hard limit for the broadcast traffic should
972 * prevent false alarms.
973 */
974 if (vif->type != NL80211_IFTYPE_STATION &&
975 (bss_conf->beacon_int * bss_conf->dtim_period >=
976 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
977 err = -EINVAL;
978 goto out;
979 }
980
981 err = carl9170_set_beacon_timers(ar);
982 if (err)
983 goto out;
984 }
985
986 if (changed & BSS_CHANGED_HT) {
987 /* TODO */
988 err = 0;
989 if (err)
990 goto out;
991 }
992
993 if (main_vif != vif)
994 goto out;
995
996 /*
997 * The following settings can only be changed by the
998 * master interface.
999 */
1000
1001 if (changed & BSS_CHANGED_BSSID) {
1002 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1003 err = carl9170_set_operating_mode(ar);
1004 if (err)
1005 goto out;
1006 }
1007
1008 if (changed & BSS_CHANGED_ASSOC) {
1009 ar->common.curaid = bss_conf->aid;
1010 err = carl9170_set_beacon_timers(ar);
1011 if (err)
1012 goto out;
1013 }
1014
1015 if (changed & BSS_CHANGED_ERP_SLOT) {
1016 err = carl9170_set_slot_time(ar);
1017 if (err)
1018 goto out;
1019 }
1020
1021 if (changed & BSS_CHANGED_BASIC_RATES) {
1022 err = carl9170_set_mac_rates(ar);
1023 if (err)
1024 goto out;
1025 }
1026
1027out:
1028 WARN_ON_ONCE(err && IS_STARTED(ar));
1029 mutex_unlock(&ar->mutex);
1030}
1031
1032static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw)
1033{
1034 struct ar9170 *ar = hw->priv;
1035 struct carl9170_tsf_rsp tsf;
1036 int err;
1037
1038 mutex_lock(&ar->mutex);
1039 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1040 0, NULL, sizeof(tsf), &tsf);
1041 mutex_unlock(&ar->mutex);
1042 if (WARN_ON(err))
1043 return 0;
1044
1045 return le64_to_cpu(tsf.tsf_64);
1046}
1047
1048static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1049 struct ieee80211_vif *vif,
1050 struct ieee80211_sta *sta,
1051 struct ieee80211_key_conf *key)
1052{
1053 struct ar9170 *ar = hw->priv;
1054 int err = 0, i;
1055 u8 ktype;
1056
1057 if (ar->disable_offload || !vif)
1058 return -EOPNOTSUPP;
1059
1060 /*
1061 * We have to fall back to software encryption, whenever
1062 * the user choose to participates in an IBSS or is connected
1063 * to more than one network.
1064 *
1065 * This is very unfortunate, because some machines cannot handle
1066 * the high througput speed in 802.11n networks.
1067 */
1068
1069 if (!is_main_vif(ar, vif)) {
1070 mutex_lock(&ar->mutex);
1071 goto err_softw;
1072 }
1073
1074 /*
1075 * While the hardware supports *catch-all* key, for offloading
1076 * group-key en-/de-cryption. The way of how the hardware
1077 * decides which keyId maps to which key, remains a mystery...
1078 */
1079 if ((vif->type != NL80211_IFTYPE_STATION &&
1080 vif->type != NL80211_IFTYPE_ADHOC) &&
1081 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1082 return -EOPNOTSUPP;
1083
1084 switch (key->cipher) {
1085 case WLAN_CIPHER_SUITE_WEP40:
1086 ktype = AR9170_ENC_ALG_WEP64;
1087 break;
1088 case WLAN_CIPHER_SUITE_WEP104:
1089 ktype = AR9170_ENC_ALG_WEP128;
1090 break;
1091 case WLAN_CIPHER_SUITE_TKIP:
1092 ktype = AR9170_ENC_ALG_TKIP;
1093 break;
1094 case WLAN_CIPHER_SUITE_CCMP:
1095 ktype = AR9170_ENC_ALG_AESCCMP;
1096 break;
1097 default:
1098 return -EOPNOTSUPP;
1099 }
1100
1101 mutex_lock(&ar->mutex);
1102 if (cmd == SET_KEY) {
1103 if (!IS_STARTED(ar)) {
1104 err = -EOPNOTSUPP;
1105 goto out;
1106 }
1107
1108 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1109 sta = NULL;
1110
1111 i = 64 + key->keyidx;
1112 } else {
1113 for (i = 0; i < 64; i++)
1114 if (!(ar->usedkeys & BIT(i)))
1115 break;
1116 if (i == 64)
1117 goto err_softw;
1118 }
1119
1120 key->hw_key_idx = i;
1121
1122 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1123 ktype, 0, key->key,
1124 min_t(u8, 16, key->keylen));
1125 if (err)
1126 goto out;
1127
1128 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1129 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1130 NULL, ktype, 1,
1131 key->key + 16, 16);
1132 if (err)
1133 goto out;
1134
1135 /*
1136 * hardware is not capable generating MMIC
1137 * of fragmented frames!
1138 */
1139 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1140 }
1141
1142 if (i < 64)
1143 ar->usedkeys |= BIT(i);
1144
1145 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1146 } else {
1147 if (!IS_STARTED(ar)) {
1148 /* The device is gone... together with the key ;-) */
1149 err = 0;
1150 goto out;
1151 }
1152
1153 if (key->hw_key_idx < 64) {
1154 ar->usedkeys &= ~BIT(key->hw_key_idx);
1155 } else {
1156 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1157 AR9170_ENC_ALG_NONE, 0,
1158 NULL, 0);
1159 if (err)
1160 goto out;
1161
1162 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1163 err = carl9170_upload_key(ar, key->hw_key_idx,
1164 NULL,
1165 AR9170_ENC_ALG_NONE,
1166 1, NULL, 0);
1167 if (err)
1168 goto out;
1169 }
1170
1171 }
1172
1173 err = carl9170_disable_key(ar, key->hw_key_idx);
1174 if (err)
1175 goto out;
1176 }
1177
1178out:
1179 mutex_unlock(&ar->mutex);
1180 return err;
1181
1182err_softw:
1183 if (!ar->rx_software_decryption) {
1184 ar->rx_software_decryption = true;
1185 carl9170_set_operating_mode(ar);
1186 }
1187 mutex_unlock(&ar->mutex);
1188 return -ENOSPC;
1189}
1190
1191static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1192 struct ieee80211_vif *vif,
1193 struct ieee80211_sta *sta)
1194{
1195 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1196 unsigned int i;
1197
1198 atomic_set(&sta_info->pending_frames, 0);
1199
1200 if (sta->ht_cap.ht_supported) {
1201 if (sta->ht_cap.ampdu_density > 6) {
1202 /*
1203 * HW does support 16us AMPDU density.
1204 * No HT-Xmit for station.
1205 */
1206
1207 return 0;
1208 }
1209
1210 for (i = 0; i < CARL9170_NUM_TID; i++)
1211 rcu_assign_pointer(sta_info->agg[i], NULL);
1212
1213 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
1214 sta_info->ht_sta = true;
1215 }
1216
1217 return 0;
1218}
1219
1220static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1221 struct ieee80211_vif *vif,
1222 struct ieee80211_sta *sta)
1223{
1224 struct ar9170 *ar = hw->priv;
1225 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1226 unsigned int i;
1227 bool cleanup = false;
1228
1229 if (sta->ht_cap.ht_supported) {
1230
1231 sta_info->ht_sta = false;
1232
1233 rcu_read_lock();
1234 for (i = 0; i < CARL9170_NUM_TID; i++) {
1235 struct carl9170_sta_tid *tid_info;
1236
1237 tid_info = rcu_dereference(sta_info->agg[i]);
1238 rcu_assign_pointer(sta_info->agg[i], NULL);
1239
1240 if (!tid_info)
1241 continue;
1242
1243 spin_lock_bh(&ar->tx_ampdu_list_lock);
1244 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1245 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1246 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1247 cleanup = true;
1248 }
1249 rcu_read_unlock();
1250
1251 if (cleanup)
1252 carl9170_ampdu_gc(ar);
1253 }
1254
1255 return 0;
1256}
1257
1258static int carl9170_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
1259 const struct ieee80211_tx_queue_params *param)
1260{
1261 struct ar9170 *ar = hw->priv;
1262 int ret;
1263
1264 mutex_lock(&ar->mutex);
1265 if (queue < ar->hw->queues) {
1266 memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param));
1267 ret = carl9170_set_qos(ar);
1268 } else {
1269 ret = -EINVAL;
1270 }
1271
1272 mutex_unlock(&ar->mutex);
1273 return ret;
1274}
1275
1276static void carl9170_ampdu_work(struct work_struct *work)
1277{
1278 struct ar9170 *ar = container_of(work, struct ar9170,
1279 ampdu_work);
1280
1281 if (!IS_STARTED(ar))
1282 return;
1283
1284 mutex_lock(&ar->mutex);
1285 carl9170_ampdu_gc(ar);
1286 mutex_unlock(&ar->mutex);
1287}
1288
1289static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1290 struct ieee80211_vif *vif,
1291 enum ieee80211_ampdu_mlme_action action,
1292 struct ieee80211_sta *sta,
1293 u16 tid, u16 *ssn, u8 buf_size)
1294{
1295 struct ar9170 *ar = hw->priv;
1296 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1297 struct carl9170_sta_tid *tid_info;
1298
1299 if (modparam_noht)
1300 return -EOPNOTSUPP;
1301
1302 switch (action) {
1303 case IEEE80211_AMPDU_TX_START:
1304 if (!sta_info->ht_sta)
1305 return -EOPNOTSUPP;
1306
1307 rcu_read_lock();
1308 if (rcu_dereference(sta_info->agg[tid])) {
1309 rcu_read_unlock();
1310 return -EBUSY;
1311 }
1312
1313 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1314 GFP_ATOMIC);
1315 if (!tid_info) {
1316 rcu_read_unlock();
1317 return -ENOMEM;
1318 }
1319
1320 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1321 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1322 tid_info->tid = tid;
1323 tid_info->max = sta_info->ampdu_max_len;
1324
1325 INIT_LIST_HEAD(&tid_info->list);
1326 INIT_LIST_HEAD(&tid_info->tmp_list);
1327 skb_queue_head_init(&tid_info->queue);
1328 spin_lock_init(&tid_info->lock);
1329
1330 spin_lock_bh(&ar->tx_ampdu_list_lock);
1331 ar->tx_ampdu_list_len++;
1332 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1333 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1334 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1335 rcu_read_unlock();
1336
1337 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1338 break;
1339
1340 case IEEE80211_AMPDU_TX_STOP:
1341 rcu_read_lock();
1342 tid_info = rcu_dereference(sta_info->agg[tid]);
1343 if (tid_info) {
1344 spin_lock_bh(&ar->tx_ampdu_list_lock);
1345 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1346 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1347 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1348 }
1349
1350 rcu_assign_pointer(sta_info->agg[tid], NULL);
1351 rcu_read_unlock();
1352
1353 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1354 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1355 break;
1356
1357 case IEEE80211_AMPDU_TX_OPERATIONAL:
1358 rcu_read_lock();
1359 tid_info = rcu_dereference(sta_info->agg[tid]);
1360
1361 sta_info->stats[tid].clear = true;
1362 sta_info->stats[tid].req = false;
1363
1364 if (tid_info) {
1365 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1366 tid_info->state = CARL9170_TID_STATE_IDLE;
1367 }
1368 rcu_read_unlock();
1369
1370 if (WARN_ON_ONCE(!tid_info))
1371 return -EFAULT;
1372
1373 break;
1374
1375 case IEEE80211_AMPDU_RX_START:
1376 case IEEE80211_AMPDU_RX_STOP:
1377 /* Handled by hardware */
1378 break;
1379
1380 default:
1381 return -EOPNOTSUPP;
1382 }
1383
1384 return 0;
1385}
1386
1387#ifdef CONFIG_CARL9170_WPC
1388static int carl9170_register_wps_button(struct ar9170 *ar)
1389{
1390 struct input_dev *input;
1391 int err;
1392
1393 if (!(ar->features & CARL9170_WPS_BUTTON))
1394 return 0;
1395
1396 input = input_allocate_device();
1397 if (!input)
1398 return -ENOMEM;
1399
1400 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1401 wiphy_name(ar->hw->wiphy));
1402
1403 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1404 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1405
1406 input->name = ar->wps.name;
1407 input->phys = ar->wps.phys;
1408 input->id.bustype = BUS_USB;
1409 input->dev.parent = &ar->hw->wiphy->dev;
1410
1411 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1412
1413 err = input_register_device(input);
1414 if (err) {
1415 input_free_device(input);
1416 return err;
1417 }
1418
1419 ar->wps.pbc = input;
1420 return 0;
1421}
1422#endif /* CONFIG_CARL9170_WPC */
1423
1424static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1425 struct survey_info *survey)
1426{
1427 struct ar9170 *ar = hw->priv;
1428 int err;
1429
1430 if (idx != 0)
1431 return -ENOENT;
1432
1433 mutex_lock(&ar->mutex);
1434 err = carl9170_get_noisefloor(ar);
1435 mutex_unlock(&ar->mutex);
1436 if (err)
1437 return err;
1438
1439 survey->channel = ar->channel;
1440 survey->filled = SURVEY_INFO_NOISE_DBM;
1441 survey->noise = ar->noise[0];
1442 return 0;
1443}
1444
1445static void carl9170_op_flush(struct ieee80211_hw *hw, bool drop)
1446{
1447 struct ar9170 *ar = hw->priv;
1448 unsigned int vid;
1449
1450 mutex_lock(&ar->mutex);
1451 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1452 carl9170_flush_cab(ar, vid);
1453
1454 carl9170_flush(ar, drop);
1455 mutex_unlock(&ar->mutex);
1456}
1457
1458static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1459 struct ieee80211_low_level_stats *stats)
1460{
1461 struct ar9170 *ar = hw->priv;
1462
1463 memset(stats, 0, sizeof(*stats));
1464 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1465 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1466 return 0;
1467}
1468
1469static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1470 struct ieee80211_vif *vif,
1471 enum sta_notify_cmd cmd,
1472 struct ieee80211_sta *sta)
1473{
1474 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1475
1476 switch (cmd) {
1477 case STA_NOTIFY_SLEEP:
1478 sta_info->sleeping = true;
1479 if (atomic_read(&sta_info->pending_frames))
1480 ieee80211_sta_block_awake(hw, sta, true);
1481 break;
1482
1483 case STA_NOTIFY_AWAKE:
1484 sta_info->sleeping = false;
1485 break;
1486 }
1487}
1488
1489static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
1490{
1491 struct ar9170 *ar = hw->priv;
1492
1493 return !!atomic_read(&ar->tx_total_queued);
1494}
1495
1496static const struct ieee80211_ops carl9170_ops = {
1497 .start = carl9170_op_start,
1498 .stop = carl9170_op_stop,
1499 .tx = carl9170_op_tx,
1500 .flush = carl9170_op_flush,
1501 .add_interface = carl9170_op_add_interface,
1502 .remove_interface = carl9170_op_remove_interface,
1503 .config = carl9170_op_config,
1504 .prepare_multicast = carl9170_op_prepare_multicast,
1505 .configure_filter = carl9170_op_configure_filter,
1506 .conf_tx = carl9170_op_conf_tx,
1507 .bss_info_changed = carl9170_op_bss_info_changed,
1508 .get_tsf = carl9170_op_get_tsf,
1509 .set_key = carl9170_op_set_key,
1510 .sta_add = carl9170_op_sta_add,
1511 .sta_remove = carl9170_op_sta_remove,
1512 .sta_notify = carl9170_op_sta_notify,
1513 .get_survey = carl9170_op_get_survey,
1514 .get_stats = carl9170_op_get_stats,
1515 .ampdu_action = carl9170_op_ampdu_action,
1516 .tx_frames_pending = carl9170_tx_frames_pending,
1517};
1518
1519void *carl9170_alloc(size_t priv_size)
1520{
1521 struct ieee80211_hw *hw;
1522 struct ar9170 *ar;
1523 struct sk_buff *skb;
1524 int i;
1525
1526 /*
1527 * this buffer is used for rx stream reconstruction.
1528 * Under heavy load this device (or the transport layer?)
1529 * tends to split the streams into separate rx descriptors.
1530 */
1531
1532 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1533 if (!skb)
1534 goto err_nomem;
1535
1536 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1537 if (!hw)
1538 goto err_nomem;
1539
1540 ar = hw->priv;
1541 ar->hw = hw;
1542 ar->rx_failover = skb;
1543
1544 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1545 ar->rx_has_plcp = false;
1546
1547 /*
1548 * Here's a hidden pitfall!
1549 *
1550 * All 4 AC queues work perfectly well under _legacy_ operation.
1551 * However as soon as aggregation is enabled, the traffic flow
1552 * gets very bumpy. Therefore we have to _switch_ to a
1553 * software AC with a single HW queue.
1554 */
1555 hw->queues = __AR9170_NUM_TXQ;
1556
1557 mutex_init(&ar->mutex);
1558 spin_lock_init(&ar->beacon_lock);
1559 spin_lock_init(&ar->cmd_lock);
1560 spin_lock_init(&ar->tx_stats_lock);
1561 spin_lock_init(&ar->tx_ampdu_list_lock);
1562 spin_lock_init(&ar->mem_lock);
1563 spin_lock_init(&ar->state_lock);
1564 atomic_set(&ar->pending_restarts, 0);
1565 ar->vifs = 0;
1566 for (i = 0; i < ar->hw->queues; i++) {
1567 skb_queue_head_init(&ar->tx_status[i]);
1568 skb_queue_head_init(&ar->tx_pending[i]);
1569 }
1570 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1571 INIT_WORK(&ar->ping_work, carl9170_ping_work);
1572 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1573 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1574 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1575 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1576 rcu_assign_pointer(ar->tx_ampdu_iter,
1577 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1578
1579 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1580 INIT_LIST_HEAD(&ar->vif_list);
1581 init_completion(&ar->tx_flush);
1582
1583 /* firmware decides which modes we support */
1584 hw->wiphy->interface_modes = 0;
1585
1586 hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS |
1587 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
1588 IEEE80211_HW_SUPPORTS_PS |
1589 IEEE80211_HW_PS_NULLFUNC_STACK |
1590 IEEE80211_HW_NEED_DTIM_PERIOD |
1591 IEEE80211_HW_SIGNAL_DBM;
1592
1593 if (!modparam_noht) {
1594 /*
1595 * see the comment above, why we allow the user
1596 * to disable HT by a module parameter.
1597 */
1598 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
1599 }
1600
1601 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1602 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1603 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1604
1605 hw->max_rates = CARL9170_TX_MAX_RATES;
1606 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1607
1608 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1609 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1610
1611 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
1612 return ar;
1613
1614err_nomem:
1615 kfree_skb(skb);
1616 return ERR_PTR(-ENOMEM);
1617}
1618
1619static int carl9170_read_eeprom(struct ar9170 *ar)
1620{
1621#define RW 8 /* number of words to read at once */
1622#define RB (sizeof(u32) * RW)
1623 u8 *eeprom = (void *)&ar->eeprom;
1624 __le32 offsets[RW];
1625 int i, j, err;
1626
1627 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1628
1629 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1630#ifndef __CHECKER__
1631 /* don't want to handle trailing remains */
1632 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1633#endif
1634
1635 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) {
1636 for (j = 0; j < RW; j++)
1637 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1638 RB * i + 4 * j);
1639
1640 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1641 RB, (u8 *) &offsets,
1642 RB, eeprom + RB * i);
1643 if (err)
1644 return err;
1645 }
1646
1647#undef RW
1648#undef RB
1649 return 0;
1650}
1651
1652static int carl9170_parse_eeprom(struct ar9170 *ar)
1653{
1654 struct ath_regulatory *regulatory = &ar->common.regulatory;
1655 unsigned int rx_streams, tx_streams, tx_params = 0;
1656 int bands = 0;
1657
1658 if (ar->eeprom.length == cpu_to_le16(0xffff))
1659 return -ENODATA;
1660
1661 rx_streams = hweight8(ar->eeprom.rx_mask);
1662 tx_streams = hweight8(ar->eeprom.tx_mask);
1663
1664 if (rx_streams != tx_streams) {
1665 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1666
1667 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1668 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1669
1670 tx_params = (tx_streams - 1) <<
1671 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1672
1673 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1674 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1675 }
1676
1677 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1678 ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1679 &carl9170_band_2GHz;
1680 bands++;
1681 }
1682 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1683 ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1684 &carl9170_band_5GHz;
1685 bands++;
1686 }
1687
1688 /*
1689 * I measured this, a bandswitch takes roughly
1690 * 135 ms and a frequency switch about 80.
1691 *
1692 * FIXME: measure these values again once EEPROM settings
1693 * are used, that will influence them!
1694 */
1695 if (bands == 2)
1696 ar->hw->channel_change_time = 135 * 1000;
1697 else
1698 ar->hw->channel_change_time = 80 * 1000;
1699
1700 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1701 regulatory->current_rd_ext = le16_to_cpu(ar->eeprom.reg_domain[1]);
1702
1703 /* second part of wiphy init */
1704 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1705
1706 return bands ? 0 : -EINVAL;
1707}
1708
1709static int carl9170_reg_notifier(struct wiphy *wiphy,
1710 struct regulatory_request *request)
1711{
1712 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1713 struct ar9170 *ar = hw->priv;
1714
1715 return ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1716}
1717
1718int carl9170_register(struct ar9170 *ar)
1719{
1720 struct ath_regulatory *regulatory = &ar->common.regulatory;
1721 int err = 0, i;
1722
1723 if (WARN_ON(ar->mem_bitmap))
1724 return -EINVAL;
1725
1726 ar->mem_bitmap = kzalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG) *
1727 sizeof(unsigned long), GFP_KERNEL);
1728
1729 if (!ar->mem_bitmap)
1730 return -ENOMEM;
1731
1732 /* try to read EEPROM, init MAC addr */
1733 err = carl9170_read_eeprom(ar);
1734 if (err)
1735 return err;
1736
1737 err = carl9170_fw_fix_eeprom(ar);
1738 if (err)
1739 return err;
1740
1741 err = carl9170_parse_eeprom(ar);
1742 if (err)
1743 return err;
1744
1745 err = ath_regd_init(regulatory, ar->hw->wiphy,
1746 carl9170_reg_notifier);
1747 if (err)
1748 return err;
1749
1750 if (modparam_noht) {
1751 carl9170_band_2GHz.ht_cap.ht_supported = false;
1752 carl9170_band_5GHz.ht_cap.ht_supported = false;
1753 }
1754
1755 for (i = 0; i < ar->fw.vif_num; i++) {
1756 ar->vif_priv[i].id = i;
1757 ar->vif_priv[i].vif = NULL;
1758 }
1759
1760 err = ieee80211_register_hw(ar->hw);
1761 if (err)
1762 return err;
1763
1764 /* mac80211 interface is now registered */
1765 ar->registered = true;
1766
1767 if (!ath_is_world_regd(regulatory))
1768 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
1769
1770#ifdef CONFIG_CARL9170_DEBUGFS
1771 carl9170_debugfs_register(ar);
1772#endif /* CONFIG_CARL9170_DEBUGFS */
1773
1774 err = carl9170_led_init(ar);
1775 if (err)
1776 goto err_unreg;
1777
1778#ifdef CONFIG_CARL9170_LEDS
1779 err = carl9170_led_register(ar);
1780 if (err)
1781 goto err_unreg;
1782#endif /* CONFIG_CARL9170_LEDS */
1783
1784#ifdef CONFIG_CARL9170_WPC
1785 err = carl9170_register_wps_button(ar);
1786 if (err)
1787 goto err_unreg;
1788#endif /* CONFIG_CARL9170_WPC */
1789
1790 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
1791 wiphy_name(ar->hw->wiphy));
1792
1793 return 0;
1794
1795err_unreg:
1796 carl9170_unregister(ar);
1797 return err;
1798}
1799
1800void carl9170_unregister(struct ar9170 *ar)
1801{
1802 if (!ar->registered)
1803 return;
1804
1805 ar->registered = false;
1806
1807#ifdef CONFIG_CARL9170_LEDS
1808 carl9170_led_unregister(ar);
1809#endif /* CONFIG_CARL9170_LEDS */
1810
1811#ifdef CONFIG_CARL9170_DEBUGFS
1812 carl9170_debugfs_unregister(ar);
1813#endif /* CONFIG_CARL9170_DEBUGFS */
1814
1815#ifdef CONFIG_CARL9170_WPC
1816 if (ar->wps.pbc) {
1817 input_unregister_device(ar->wps.pbc);
1818 ar->wps.pbc = NULL;
1819 }
1820#endif /* CONFIG_CARL9170_WPC */
1821
1822 carl9170_cancel_worker(ar);
1823 cancel_work_sync(&ar->restart_work);
1824
1825 ieee80211_unregister_hw(ar->hw);
1826}
1827
1828void carl9170_free(struct ar9170 *ar)
1829{
1830 WARN_ON(ar->registered);
1831 WARN_ON(IS_INITIALIZED(ar));
1832
1833 kfree_skb(ar->rx_failover);
1834 ar->rx_failover = NULL;
1835
1836 kfree(ar->mem_bitmap);
1837 ar->mem_bitmap = NULL;
1838
1839 mutex_destroy(&ar->mutex);
1840
1841 ieee80211_free_hw(ar->hw);
1842}
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/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
50static bool modparam_nohwcrypt;
51module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
52MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
53
54int modparam_noht;
55module_param_named(noht, modparam_noht, int, 0444);
56MODULE_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
64struct 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
95static 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
112static 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
168static 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
176static 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
184static 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
219static 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
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
239 carl9170_tx_status(ar, skb, false);
240 }
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
249static 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
276static 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 bitmap_zero(ar->mem_bitmap, ar->fw.mem_blocks);
311
312 rcu_read_lock();
313 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
314 spin_lock_bh(&ar->beacon_lock);
315 dev_kfree_skb_any(cvif->beacon);
316 cvif->beacon = NULL;
317 spin_unlock_bh(&ar->beacon_lock);
318 }
319 rcu_read_unlock();
320
321 atomic_set(&ar->tx_ampdu_upload, 0);
322 atomic_set(&ar->tx_ampdu_scheduler, 0);
323 atomic_set(&ar->tx_total_pending, 0);
324 atomic_set(&ar->tx_total_queued, 0);
325 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
326}
327
328#define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
329do { \
330 queue.aifs = ai_fs; \
331 queue.cw_min = cwmin; \
332 queue.cw_max = cwmax; \
333 queue.txop = _txop; \
334} while (0)
335
336static int carl9170_op_start(struct ieee80211_hw *hw)
337{
338 struct ar9170 *ar = hw->priv;
339 int err, i;
340
341 mutex_lock(&ar->mutex);
342
343 carl9170_zap_queues(ar);
344
345 /* reset QoS defaults */
346 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47);
347 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94);
348 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0);
349 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0);
350 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0);
351
352 ar->current_factor = ar->current_density = -1;
353 /* "The first key is unique." */
354 ar->usedkeys = 1;
355 ar->filter_state = 0;
356 ar->ps.last_action = jiffies;
357 ar->ps.last_slept = jiffies;
358 ar->erp_mode = CARL9170_ERP_AUTO;
359
360 /* Set "disable hw crypto offload" whenever the module parameter
361 * nohwcrypt is true or if the firmware does not support it.
362 */
363 ar->disable_offload = modparam_nohwcrypt |
364 ar->fw.disable_offload_fw;
365 ar->rx_software_decryption = ar->disable_offload;
366
367 for (i = 0; i < ar->hw->queues; i++) {
368 ar->queue_stop_timeout[i] = jiffies;
369 ar->max_queue_stop_timeout[i] = 0;
370 }
371
372 atomic_set(&ar->mem_allocs, 0);
373
374 err = carl9170_usb_open(ar);
375 if (err)
376 goto out;
377
378 err = carl9170_init_mac(ar);
379 if (err)
380 goto out;
381
382 err = carl9170_set_qos(ar);
383 if (err)
384 goto out;
385
386 if (ar->fw.rx_filter) {
387 err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA |
388 CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD);
389 if (err)
390 goto out;
391 }
392
393 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
394 AR9170_DMA_TRIGGER_RXQ);
395 if (err)
396 goto out;
397
398 /* Clear key-cache */
399 for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) {
400 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
401 0, NULL, 0);
402 if (err)
403 goto out;
404
405 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
406 1, NULL, 0);
407 if (err)
408 goto out;
409
410 if (i < AR9170_CAM_MAX_USER) {
411 err = carl9170_disable_key(ar, i);
412 if (err)
413 goto out;
414 }
415 }
416
417 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
418
419 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
420 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
421
422 ieee80211_wake_queues(ar->hw);
423 err = 0;
424
425out:
426 mutex_unlock(&ar->mutex);
427 return err;
428}
429
430static void carl9170_cancel_worker(struct ar9170 *ar)
431{
432 cancel_delayed_work_sync(&ar->stat_work);
433 cancel_delayed_work_sync(&ar->tx_janitor);
434#ifdef CONFIG_CARL9170_LEDS
435 cancel_delayed_work_sync(&ar->led_work);
436#endif /* CONFIG_CARL9170_LEDS */
437 cancel_work_sync(&ar->ps_work);
438 cancel_work_sync(&ar->ping_work);
439 cancel_work_sync(&ar->ampdu_work);
440}
441
442static void carl9170_op_stop(struct ieee80211_hw *hw)
443{
444 struct ar9170 *ar = hw->priv;
445
446 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
447
448 ieee80211_stop_queues(ar->hw);
449
450 mutex_lock(&ar->mutex);
451 if (IS_ACCEPTING_CMD(ar)) {
452 RCU_INIT_POINTER(ar->beacon_iter, NULL);
453
454 carl9170_led_set_state(ar, 0);
455
456 /* stop DMA */
457 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
458 carl9170_usb_stop(ar);
459 }
460
461 carl9170_zap_queues(ar);
462 mutex_unlock(&ar->mutex);
463
464 carl9170_cancel_worker(ar);
465}
466
467static void carl9170_restart_work(struct work_struct *work)
468{
469 struct ar9170 *ar = container_of(work, struct ar9170,
470 restart_work);
471 int err = -EIO;
472
473 ar->usedkeys = 0;
474 ar->filter_state = 0;
475 carl9170_cancel_worker(ar);
476
477 mutex_lock(&ar->mutex);
478 if (!ar->force_usb_reset) {
479 err = carl9170_usb_restart(ar);
480 if (net_ratelimit()) {
481 if (err)
482 dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err);
483 else
484 dev_info(&ar->udev->dev, "device restarted successfully.\n");
485 }
486 }
487 carl9170_zap_queues(ar);
488 mutex_unlock(&ar->mutex);
489
490 if (!err && !ar->force_usb_reset) {
491 ar->restart_counter++;
492 atomic_set(&ar->pending_restarts, 0);
493
494 ieee80211_restart_hw(ar->hw);
495 } else {
496 /*
497 * The reset was unsuccessful and the device seems to
498 * be dead. But there's still one option: a low-level
499 * usb subsystem reset...
500 */
501
502 carl9170_usb_reset(ar);
503 }
504}
505
506void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
507{
508 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
509
510 /*
511 * Sometimes, an error can trigger several different reset events.
512 * By ignoring these *surplus* reset events, the device won't be
513 * killed again, right after it has recovered.
514 */
515 if (atomic_inc_return(&ar->pending_restarts) > 1) {
516 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
517 return;
518 }
519
520 ieee80211_stop_queues(ar->hw);
521
522 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
523
524 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
525 !WARN_ON(r >= __CARL9170_RR_LAST))
526 ar->last_reason = r;
527
528 if (!ar->registered)
529 return;
530
531 if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset)
532 ar->force_usb_reset = true;
533
534 ieee80211_queue_work(ar->hw, &ar->restart_work);
535
536 /*
537 * At this point, the device instance might have vanished/disabled.
538 * So, don't put any code which access the ar9170 struct
539 * without proper protection.
540 */
541}
542
543static void carl9170_ping_work(struct work_struct *work)
544{
545 struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
546 int err;
547
548 if (!IS_STARTED(ar))
549 return;
550
551 mutex_lock(&ar->mutex);
552 err = carl9170_echo_test(ar, 0xdeadbeef);
553 if (err)
554 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
555 mutex_unlock(&ar->mutex);
556}
557
558static int carl9170_init_interface(struct ar9170 *ar,
559 struct ieee80211_vif *vif)
560{
561 struct ath_common *common = &ar->common;
562 int err;
563
564 if (!vif) {
565 WARN_ON_ONCE(IS_STARTED(ar));
566 return 0;
567 }
568
569 memcpy(common->macaddr, vif->addr, ETH_ALEN);
570
571 /* We have to fall back to software crypto, whenever
572 * the user choose to participates in an IBSS. HW
573 * offload for IBSS RSN is not supported by this driver.
574 *
575 * NOTE: If the previous main interface has already
576 * disabled hw crypto offload, we have to keep this
577 * previous disable_offload setting as it was.
578 * Altough ideally, we should notify mac80211 and tell
579 * it to forget about any HW crypto offload for now.
580 */
581 ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) &&
582 (vif->type != NL80211_IFTYPE_AP));
583
584 /* The driver used to have P2P GO+CLIENT support,
585 * but since this was dropped and we don't know if
586 * there are any gremlins lurking in the shadows,
587 * so best we keep HW offload disabled for P2P.
588 */
589 ar->disable_offload |= vif->p2p;
590
591 ar->rx_software_decryption = ar->disable_offload;
592
593 err = carl9170_set_operating_mode(ar);
594 return err;
595}
596
597static int carl9170_op_add_interface(struct ieee80211_hw *hw,
598 struct ieee80211_vif *vif)
599{
600 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
601 struct ieee80211_vif *main_vif, *old_main = NULL;
602 struct ar9170 *ar = hw->priv;
603 int vif_id = -1, err = 0;
604
605 mutex_lock(&ar->mutex);
606 rcu_read_lock();
607 if (vif_priv->active) {
608 /*
609 * Skip the interface structure initialization,
610 * if the vif survived the _restart call.
611 */
612 vif_id = vif_priv->id;
613 vif_priv->enable_beacon = false;
614
615 spin_lock_bh(&ar->beacon_lock);
616 dev_kfree_skb_any(vif_priv->beacon);
617 vif_priv->beacon = NULL;
618 spin_unlock_bh(&ar->beacon_lock);
619
620 goto init;
621 }
622
623 /* Because the AR9170 HW's MAC doesn't provide full support for
624 * multiple, independent interfaces [of different operation modes].
625 * We have to select ONE main interface [main mode of HW], but we
626 * can have multiple slaves [AKA: entry in the ACK-table].
627 *
628 * The first (from HEAD/TOP) interface in the ar->vif_list is
629 * always the main intf. All following intfs in this list
630 * are considered to be slave intfs.
631 */
632 main_vif = carl9170_get_main_vif(ar);
633
634 if (main_vif) {
635 switch (main_vif->type) {
636 case NL80211_IFTYPE_STATION:
637 if (vif->type == NL80211_IFTYPE_STATION)
638 break;
639
640 err = -EBUSY;
641 rcu_read_unlock();
642
643 goto unlock;
644
645 case NL80211_IFTYPE_MESH_POINT:
646 case NL80211_IFTYPE_AP:
647 if ((vif->type == NL80211_IFTYPE_STATION) ||
648 (vif->type == NL80211_IFTYPE_AP) ||
649 (vif->type == NL80211_IFTYPE_MESH_POINT))
650 break;
651
652 err = -EBUSY;
653 rcu_read_unlock();
654 goto unlock;
655
656 default:
657 rcu_read_unlock();
658 goto unlock;
659 }
660 }
661
662 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
663
664 if (vif_id < 0) {
665 rcu_read_unlock();
666
667 err = -ENOSPC;
668 goto unlock;
669 }
670
671 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
672
673 vif_priv->active = true;
674 vif_priv->id = vif_id;
675 vif_priv->enable_beacon = false;
676 ar->vifs++;
677 if (old_main) {
678 /* We end up in here, if the main interface is being replaced.
679 * Put the new main interface at the HEAD of the list and the
680 * previous inteface will automatically become second in line.
681 */
682 list_add_rcu(&vif_priv->list, &ar->vif_list);
683 } else {
684 /* Add new inteface. If the list is empty, it will become the
685 * main inteface, otherwise it will be slave.
686 */
687 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
688 }
689 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
690
691init:
692 main_vif = carl9170_get_main_vif(ar);
693
694 if (main_vif == vif) {
695 rcu_assign_pointer(ar->beacon_iter, vif_priv);
696 rcu_read_unlock();
697
698 if (old_main) {
699 struct carl9170_vif_info *old_main_priv =
700 (void *) old_main->drv_priv;
701 /* downgrade old main intf to slave intf.
702 * NOTE: We are no longer under rcu_read_lock.
703 * But we are still holding ar->mutex, so the
704 * vif data [id, addr] is safe.
705 */
706 err = carl9170_mod_virtual_mac(ar, old_main_priv->id,
707 old_main->addr);
708 if (err)
709 goto unlock;
710 }
711
712 err = carl9170_init_interface(ar, vif);
713 if (err)
714 goto unlock;
715 } else {
716 rcu_read_unlock();
717 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
718
719 if (err)
720 goto unlock;
721 }
722
723 if (ar->fw.tx_seq_table) {
724 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
725 0);
726 if (err)
727 goto unlock;
728 }
729
730unlock:
731 if (err && (vif_id >= 0)) {
732 vif_priv->active = false;
733 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
734 ar->vifs--;
735 RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL);
736 list_del_rcu(&vif_priv->list);
737 mutex_unlock(&ar->mutex);
738 synchronize_rcu();
739 } else {
740 if (ar->vifs > 1)
741 ar->ps.off_override |= PS_OFF_VIF;
742
743 mutex_unlock(&ar->mutex);
744 }
745
746 return err;
747}
748
749static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
750 struct ieee80211_vif *vif)
751{
752 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
753 struct ieee80211_vif *main_vif;
754 struct ar9170 *ar = hw->priv;
755 unsigned int id;
756
757 mutex_lock(&ar->mutex);
758
759 if (WARN_ON_ONCE(!vif_priv->active))
760 goto unlock;
761
762 ar->vifs--;
763
764 rcu_read_lock();
765 main_vif = carl9170_get_main_vif(ar);
766
767 id = vif_priv->id;
768
769 vif_priv->active = false;
770 WARN_ON(vif_priv->enable_beacon);
771 vif_priv->enable_beacon = false;
772 list_del_rcu(&vif_priv->list);
773 RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL);
774
775 if (vif == main_vif) {
776 rcu_read_unlock();
777
778 if (ar->vifs) {
779 WARN_ON(carl9170_init_interface(ar,
780 carl9170_get_main_vif(ar)));
781 } else {
782 carl9170_set_operating_mode(ar);
783 }
784 } else {
785 rcu_read_unlock();
786
787 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
788 }
789
790 carl9170_update_beacon(ar, false);
791 carl9170_flush_cab(ar, id);
792
793 spin_lock_bh(&ar->beacon_lock);
794 dev_kfree_skb_any(vif_priv->beacon);
795 vif_priv->beacon = NULL;
796 spin_unlock_bh(&ar->beacon_lock);
797
798 bitmap_release_region(&ar->vif_bitmap, id, 0);
799
800 carl9170_set_beacon_timers(ar);
801
802 if (ar->vifs == 1)
803 ar->ps.off_override &= ~PS_OFF_VIF;
804
805unlock:
806 mutex_unlock(&ar->mutex);
807
808 synchronize_rcu();
809}
810
811void carl9170_ps_check(struct ar9170 *ar)
812{
813 ieee80211_queue_work(ar->hw, &ar->ps_work);
814}
815
816/* caller must hold ar->mutex */
817static int carl9170_ps_update(struct ar9170 *ar)
818{
819 bool ps = false;
820 int err = 0;
821
822 if (!ar->ps.off_override)
823 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
824
825 if (ps != ar->ps.state) {
826 err = carl9170_powersave(ar, ps);
827 if (err)
828 return err;
829
830 if (ar->ps.state && !ps) {
831 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
832 ar->ps.last_action);
833 }
834
835 if (ps)
836 ar->ps.last_slept = jiffies;
837
838 ar->ps.last_action = jiffies;
839 ar->ps.state = ps;
840 }
841
842 return 0;
843}
844
845static void carl9170_ps_work(struct work_struct *work)
846{
847 struct ar9170 *ar = container_of(work, struct ar9170,
848 ps_work);
849 mutex_lock(&ar->mutex);
850 if (IS_STARTED(ar))
851 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
852 mutex_unlock(&ar->mutex);
853}
854
855static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
856{
857 int err;
858
859 if (noise) {
860 err = carl9170_get_noisefloor(ar);
861 if (err)
862 return err;
863 }
864
865 if (ar->fw.hw_counters) {
866 err = carl9170_collect_tally(ar);
867 if (err)
868 return err;
869 }
870
871 if (flush)
872 memset(&ar->tally, 0, sizeof(ar->tally));
873
874 return 0;
875}
876
877static void carl9170_stat_work(struct work_struct *work)
878{
879 struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
880 int err;
881
882 mutex_lock(&ar->mutex);
883 err = carl9170_update_survey(ar, false, true);
884 mutex_unlock(&ar->mutex);
885
886 if (err)
887 return;
888
889 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
890 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
891}
892
893static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
894{
895 struct ar9170 *ar = hw->priv;
896 int err = 0;
897
898 mutex_lock(&ar->mutex);
899 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
900 /* TODO */
901 err = 0;
902 }
903
904 if (changed & IEEE80211_CONF_CHANGE_PS) {
905 err = carl9170_ps_update(ar);
906 if (err)
907 goto out;
908 }
909
910 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
911 /* TODO */
912 err = 0;
913 }
914
915 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
916 enum nl80211_channel_type channel_type =
917 cfg80211_get_chandef_type(&hw->conf.chandef);
918
919 /* adjust slot time for 5 GHz */
920 err = carl9170_set_slot_time(ar);
921 if (err)
922 goto out;
923
924 err = carl9170_update_survey(ar, true, false);
925 if (err)
926 goto out;
927
928 err = carl9170_set_channel(ar, hw->conf.chandef.chan,
929 channel_type);
930 if (err)
931 goto out;
932
933 err = carl9170_update_survey(ar, false, true);
934 if (err)
935 goto out;
936
937 err = carl9170_set_dyn_sifs_ack(ar);
938 if (err)
939 goto out;
940
941 err = carl9170_set_rts_cts_rate(ar);
942 if (err)
943 goto out;
944 }
945
946 if (changed & IEEE80211_CONF_CHANGE_POWER) {
947 err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan);
948 if (err)
949 goto out;
950 }
951
952out:
953 mutex_unlock(&ar->mutex);
954 return err;
955}
956
957static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
958 struct netdev_hw_addr_list *mc_list)
959{
960 struct netdev_hw_addr *ha;
961 u64 mchash;
962
963 /* always get broadcast frames */
964 mchash = 1ULL << (0xff >> 2);
965
966 netdev_hw_addr_list_for_each(ha, mc_list)
967 mchash |= 1ULL << (ha->addr[5] >> 2);
968
969 return mchash;
970}
971
972static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
973 unsigned int changed_flags,
974 unsigned int *new_flags,
975 u64 multicast)
976{
977 struct ar9170 *ar = hw->priv;
978
979 /* mask supported flags */
980 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
981
982 if (!IS_ACCEPTING_CMD(ar))
983 return;
984
985 mutex_lock(&ar->mutex);
986
987 ar->filter_state = *new_flags;
988 /*
989 * We can support more by setting the sniffer bit and
990 * then checking the error flags, later.
991 */
992
993 if (*new_flags & FIF_ALLMULTI)
994 multicast = ~0ULL;
995
996 if (multicast != ar->cur_mc_hash)
997 WARN_ON(carl9170_update_multicast(ar, multicast));
998
999 if (changed_flags & FIF_OTHER_BSS) {
1000 ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS);
1001
1002 WARN_ON(carl9170_set_operating_mode(ar));
1003 }
1004
1005 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
1006 u32 rx_filter = 0;
1007
1008 if (!ar->fw.ba_filter)
1009 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1010
1011 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
1012 rx_filter |= CARL9170_RX_FILTER_BAD;
1013
1014 if (!(*new_flags & FIF_CONTROL))
1015 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1016
1017 if (!(*new_flags & FIF_PSPOLL))
1018 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
1019
1020 if (!(*new_flags & FIF_OTHER_BSS)) {
1021 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
1022 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
1023 }
1024
1025 WARN_ON(carl9170_rx_filter(ar, rx_filter));
1026 }
1027
1028 mutex_unlock(&ar->mutex);
1029}
1030
1031
1032static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
1033 struct ieee80211_vif *vif,
1034 struct ieee80211_bss_conf *bss_conf,
1035 u64 changed)
1036{
1037 struct ar9170 *ar = hw->priv;
1038 struct ath_common *common = &ar->common;
1039 int err = 0;
1040 struct carl9170_vif_info *vif_priv;
1041 struct ieee80211_vif *main_vif;
1042
1043 mutex_lock(&ar->mutex);
1044 vif_priv = (void *) vif->drv_priv;
1045 main_vif = carl9170_get_main_vif(ar);
1046 if (WARN_ON(!main_vif))
1047 goto out;
1048
1049 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1050 struct carl9170_vif_info *iter;
1051 int i = 0;
1052
1053 vif_priv->enable_beacon = bss_conf->enable_beacon;
1054 rcu_read_lock();
1055 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
1056 if (iter->active && iter->enable_beacon)
1057 i++;
1058
1059 }
1060 rcu_read_unlock();
1061
1062 ar->beacon_enabled = i;
1063 }
1064
1065 if (changed & BSS_CHANGED_BEACON) {
1066 err = carl9170_update_beacon(ar, false);
1067 if (err)
1068 goto out;
1069 }
1070
1071 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
1072 BSS_CHANGED_BEACON_INT)) {
1073
1074 if (main_vif != vif) {
1075 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
1076 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
1077 }
1078
1079 /*
1080 * Therefore a hard limit for the broadcast traffic should
1081 * prevent false alarms.
1082 */
1083 if (vif->type != NL80211_IFTYPE_STATION &&
1084 (bss_conf->beacon_int * bss_conf->dtim_period >=
1085 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
1086 err = -EINVAL;
1087 goto out;
1088 }
1089
1090 err = carl9170_set_beacon_timers(ar);
1091 if (err)
1092 goto out;
1093 }
1094
1095 if (changed & BSS_CHANGED_HT) {
1096 /* TODO */
1097 err = 0;
1098 if (err)
1099 goto out;
1100 }
1101
1102 if (main_vif != vif)
1103 goto out;
1104
1105 /*
1106 * The following settings can only be changed by the
1107 * master interface.
1108 */
1109
1110 if (changed & BSS_CHANGED_BSSID) {
1111 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1112 err = carl9170_set_operating_mode(ar);
1113 if (err)
1114 goto out;
1115 }
1116
1117 if (changed & BSS_CHANGED_ASSOC) {
1118 ar->common.curaid = vif->cfg.aid;
1119 err = carl9170_set_beacon_timers(ar);
1120 if (err)
1121 goto out;
1122 }
1123
1124 if (changed & BSS_CHANGED_ERP_SLOT) {
1125 err = carl9170_set_slot_time(ar);
1126 if (err)
1127 goto out;
1128 }
1129
1130 if (changed & BSS_CHANGED_BASIC_RATES) {
1131 err = carl9170_set_mac_rates(ar);
1132 if (err)
1133 goto out;
1134 }
1135
1136out:
1137 WARN_ON_ONCE(err && IS_STARTED(ar));
1138 mutex_unlock(&ar->mutex);
1139}
1140
1141static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw,
1142 struct ieee80211_vif *vif)
1143{
1144 struct ar9170 *ar = hw->priv;
1145 struct carl9170_tsf_rsp tsf;
1146 int err;
1147
1148 mutex_lock(&ar->mutex);
1149 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1150 0, NULL, sizeof(tsf), &tsf);
1151 mutex_unlock(&ar->mutex);
1152 if (WARN_ON(err))
1153 return 0;
1154
1155 return le64_to_cpu(tsf.tsf_64);
1156}
1157
1158static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1159 struct ieee80211_vif *vif,
1160 struct ieee80211_sta *sta,
1161 struct ieee80211_key_conf *key)
1162{
1163 struct ar9170 *ar = hw->priv;
1164 int err = 0, i;
1165 u8 ktype;
1166
1167 if (ar->disable_offload || !vif)
1168 return -EOPNOTSUPP;
1169
1170 /* Fall back to software encryption whenever the driver is connected
1171 * to more than one network.
1172 *
1173 * This is very unfortunate, because some machines cannot handle
1174 * the high througput speed in 802.11n networks.
1175 */
1176
1177 if (!is_main_vif(ar, vif)) {
1178 mutex_lock(&ar->mutex);
1179 goto err_softw;
1180 }
1181
1182 /*
1183 * While the hardware supports *catch-all* key, for offloading
1184 * group-key en-/de-cryption. The way of how the hardware
1185 * decides which keyId maps to which key, remains a mystery...
1186 */
1187 if ((vif->type != NL80211_IFTYPE_STATION &&
1188 vif->type != NL80211_IFTYPE_ADHOC) &&
1189 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1190 return -EOPNOTSUPP;
1191
1192 switch (key->cipher) {
1193 case WLAN_CIPHER_SUITE_WEP40:
1194 ktype = AR9170_ENC_ALG_WEP64;
1195 break;
1196 case WLAN_CIPHER_SUITE_WEP104:
1197 ktype = AR9170_ENC_ALG_WEP128;
1198 break;
1199 case WLAN_CIPHER_SUITE_TKIP:
1200 ktype = AR9170_ENC_ALG_TKIP;
1201 break;
1202 case WLAN_CIPHER_SUITE_CCMP:
1203 ktype = AR9170_ENC_ALG_AESCCMP;
1204 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1205 break;
1206 default:
1207 return -EOPNOTSUPP;
1208 }
1209
1210 mutex_lock(&ar->mutex);
1211 if (cmd == SET_KEY) {
1212 if (!IS_STARTED(ar)) {
1213 err = -EOPNOTSUPP;
1214 goto out;
1215 }
1216
1217 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1218 sta = NULL;
1219
1220 i = 64 + key->keyidx;
1221 } else {
1222 for (i = 0; i < 64; i++)
1223 if (!(ar->usedkeys & BIT(i)))
1224 break;
1225 if (i == 64)
1226 goto err_softw;
1227 }
1228
1229 key->hw_key_idx = i;
1230
1231 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1232 ktype, 0, key->key,
1233 min_t(u8, 16, key->keylen));
1234 if (err)
1235 goto out;
1236
1237 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1238 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1239 NULL, ktype, 1,
1240 key->key + 16, 16);
1241 if (err)
1242 goto out;
1243
1244 /*
1245 * hardware is not capable generating MMIC
1246 * of fragmented frames!
1247 */
1248 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1249 }
1250
1251 if (i < 64)
1252 ar->usedkeys |= BIT(i);
1253
1254 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1255 } else {
1256 if (!IS_STARTED(ar)) {
1257 /* The device is gone... together with the key ;-) */
1258 err = 0;
1259 goto out;
1260 }
1261
1262 if (key->hw_key_idx < 64) {
1263 ar->usedkeys &= ~BIT(key->hw_key_idx);
1264 } else {
1265 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1266 AR9170_ENC_ALG_NONE, 0,
1267 NULL, 0);
1268 if (err)
1269 goto out;
1270
1271 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1272 err = carl9170_upload_key(ar, key->hw_key_idx,
1273 NULL,
1274 AR9170_ENC_ALG_NONE,
1275 1, NULL, 0);
1276 if (err)
1277 goto out;
1278 }
1279
1280 }
1281
1282 err = carl9170_disable_key(ar, key->hw_key_idx);
1283 if (err)
1284 goto out;
1285 }
1286
1287out:
1288 mutex_unlock(&ar->mutex);
1289 return err;
1290
1291err_softw:
1292 if (!ar->rx_software_decryption) {
1293 ar->rx_software_decryption = true;
1294 carl9170_set_operating_mode(ar);
1295 }
1296 mutex_unlock(&ar->mutex);
1297 return -ENOSPC;
1298}
1299
1300static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1301 struct ieee80211_vif *vif,
1302 struct ieee80211_sta *sta)
1303{
1304 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1305 unsigned int i;
1306
1307 atomic_set(&sta_info->pending_frames, 0);
1308
1309 if (sta->deflink.ht_cap.ht_supported) {
1310 if (sta->deflink.ht_cap.ampdu_density > 6) {
1311 /*
1312 * HW does support 16us AMPDU density.
1313 * No HT-Xmit for station.
1314 */
1315
1316 return 0;
1317 }
1318
1319 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++)
1320 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1321
1322 sta_info->ampdu_max_len = 1 << (3 + sta->deflink.ht_cap.ampdu_factor);
1323 sta_info->ht_sta = true;
1324 }
1325
1326 return 0;
1327}
1328
1329static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1330 struct ieee80211_vif *vif,
1331 struct ieee80211_sta *sta)
1332{
1333 struct ar9170 *ar = hw->priv;
1334 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1335 unsigned int i;
1336 bool cleanup = false;
1337
1338 if (sta->deflink.ht_cap.ht_supported) {
1339
1340 sta_info->ht_sta = false;
1341
1342 rcu_read_lock();
1343 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) {
1344 struct carl9170_sta_tid *tid_info;
1345
1346 tid_info = rcu_dereference(sta_info->agg[i]);
1347 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1348
1349 if (!tid_info)
1350 continue;
1351
1352 spin_lock_bh(&ar->tx_ampdu_list_lock);
1353 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1354 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1355 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1356 cleanup = true;
1357 }
1358 rcu_read_unlock();
1359
1360 if (cleanup)
1361 carl9170_ampdu_gc(ar);
1362 }
1363
1364 return 0;
1365}
1366
1367static int carl9170_op_conf_tx(struct ieee80211_hw *hw,
1368 struct ieee80211_vif *vif,
1369 unsigned int link_id, u16 queue,
1370 const struct ieee80211_tx_queue_params *param)
1371{
1372 struct ar9170 *ar = hw->priv;
1373 int ret;
1374
1375 mutex_lock(&ar->mutex);
1376 memcpy(&ar->edcf[ar9170_qmap(queue)], param, sizeof(*param));
1377 ret = carl9170_set_qos(ar);
1378 mutex_unlock(&ar->mutex);
1379 return ret;
1380}
1381
1382static void carl9170_ampdu_work(struct work_struct *work)
1383{
1384 struct ar9170 *ar = container_of(work, struct ar9170,
1385 ampdu_work);
1386
1387 if (!IS_STARTED(ar))
1388 return;
1389
1390 mutex_lock(&ar->mutex);
1391 carl9170_ampdu_gc(ar);
1392 mutex_unlock(&ar->mutex);
1393}
1394
1395static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1396 struct ieee80211_vif *vif,
1397 struct ieee80211_ampdu_params *params)
1398{
1399 struct ieee80211_sta *sta = params->sta;
1400 enum ieee80211_ampdu_mlme_action action = params->action;
1401 u16 tid = params->tid;
1402 u16 *ssn = ¶ms->ssn;
1403 struct ar9170 *ar = hw->priv;
1404 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1405 struct carl9170_sta_tid *tid_info;
1406
1407 if (modparam_noht)
1408 return -EOPNOTSUPP;
1409
1410 switch (action) {
1411 case IEEE80211_AMPDU_TX_START:
1412 if (!sta_info->ht_sta)
1413 return -EOPNOTSUPP;
1414
1415 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1416 GFP_KERNEL);
1417 if (!tid_info)
1418 return -ENOMEM;
1419
1420 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1421 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1422 tid_info->tid = tid;
1423 tid_info->max = sta_info->ampdu_max_len;
1424 tid_info->sta = sta;
1425 tid_info->vif = vif;
1426
1427 INIT_LIST_HEAD(&tid_info->list);
1428 INIT_LIST_HEAD(&tid_info->tmp_list);
1429 skb_queue_head_init(&tid_info->queue);
1430 spin_lock_init(&tid_info->lock);
1431
1432 spin_lock_bh(&ar->tx_ampdu_list_lock);
1433 ar->tx_ampdu_list_len++;
1434 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1435 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1436 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1437
1438 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
1439
1440 case IEEE80211_AMPDU_TX_STOP_CONT:
1441 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1442 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1443 rcu_read_lock();
1444 tid_info = rcu_dereference(sta_info->agg[tid]);
1445 if (tid_info) {
1446 spin_lock_bh(&ar->tx_ampdu_list_lock);
1447 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1448 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1449 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1450 }
1451
1452 RCU_INIT_POINTER(sta_info->agg[tid], NULL);
1453 rcu_read_unlock();
1454
1455 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1456 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1457 break;
1458
1459 case IEEE80211_AMPDU_TX_OPERATIONAL:
1460 rcu_read_lock();
1461 tid_info = rcu_dereference(sta_info->agg[tid]);
1462
1463 sta_info->stats[tid].clear = true;
1464 sta_info->stats[tid].req = false;
1465
1466 if (tid_info) {
1467 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1468 tid_info->state = CARL9170_TID_STATE_IDLE;
1469 }
1470 rcu_read_unlock();
1471
1472 if (WARN_ON_ONCE(!tid_info))
1473 return -EFAULT;
1474
1475 break;
1476
1477 case IEEE80211_AMPDU_RX_START:
1478 case IEEE80211_AMPDU_RX_STOP:
1479 /* Handled by hardware */
1480 break;
1481
1482 default:
1483 return -EOPNOTSUPP;
1484 }
1485
1486 return 0;
1487}
1488
1489#ifdef CONFIG_CARL9170_WPC
1490static int carl9170_register_wps_button(struct ar9170 *ar)
1491{
1492 struct input_dev *input;
1493 int err;
1494
1495 if (!(ar->features & CARL9170_WPS_BUTTON))
1496 return 0;
1497
1498 input = devm_input_allocate_device(&ar->udev->dev);
1499 if (!input)
1500 return -ENOMEM;
1501
1502 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1503 wiphy_name(ar->hw->wiphy));
1504
1505 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1506 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1507
1508 input->name = ar->wps.name;
1509 input->phys = ar->wps.phys;
1510 input->id.bustype = BUS_USB;
1511 input->dev.parent = &ar->hw->wiphy->dev;
1512
1513 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1514
1515 err = input_register_device(input);
1516 if (err)
1517 return err;
1518
1519 ar->wps.pbc = input;
1520 return 0;
1521}
1522#endif /* CONFIG_CARL9170_WPC */
1523
1524#ifdef CONFIG_CARL9170_HWRNG
1525static int carl9170_rng_get(struct ar9170 *ar)
1526{
1527
1528#define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
1529#define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
1530
1531 static const __le32 rng_load[RW] = {
1532 [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)};
1533
1534 u32 buf[RW];
1535
1536 unsigned int i, off = 0, transfer, count;
1537 int err;
1538
1539 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
1540
1541 if (!IS_ACCEPTING_CMD(ar))
1542 return -EAGAIN;
1543
1544 count = ARRAY_SIZE(ar->rng.cache);
1545 while (count) {
1546 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1547 RB, (u8 *) rng_load,
1548 RB, (u8 *) buf);
1549 if (err)
1550 return err;
1551
1552 transfer = min_t(unsigned int, count, RW);
1553 for (i = 0; i < transfer; i++)
1554 ar->rng.cache[off + i] = buf[i];
1555
1556 off += transfer;
1557 count -= transfer;
1558 }
1559
1560 ar->rng.cache_idx = 0;
1561
1562#undef RW
1563#undef RB
1564 return 0;
1565}
1566
1567static int carl9170_rng_read(struct hwrng *rng, u32 *data)
1568{
1569 struct ar9170 *ar = (struct ar9170 *)rng->priv;
1570 int ret = -EIO;
1571
1572 mutex_lock(&ar->mutex);
1573 if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) {
1574 ret = carl9170_rng_get(ar);
1575 if (ret) {
1576 mutex_unlock(&ar->mutex);
1577 return ret;
1578 }
1579 }
1580
1581 *data = ar->rng.cache[ar->rng.cache_idx++];
1582 mutex_unlock(&ar->mutex);
1583
1584 return sizeof(u16);
1585}
1586
1587static int carl9170_register_hwrng(struct ar9170 *ar)
1588{
1589 int err;
1590
1591 snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name),
1592 "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy));
1593 ar->rng.rng.name = ar->rng.name;
1594 ar->rng.rng.data_read = carl9170_rng_read;
1595 ar->rng.rng.priv = (unsigned long)ar;
1596
1597 err = devm_hwrng_register(&ar->udev->dev, &ar->rng.rng);
1598 if (err) {
1599 dev_err(&ar->udev->dev, "Failed to register the random "
1600 "number generator (%d)\n", err);
1601 return err;
1602 }
1603
1604 return carl9170_rng_get(ar);
1605}
1606#endif /* CONFIG_CARL9170_HWRNG */
1607
1608static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1609 struct survey_info *survey)
1610{
1611 struct ar9170 *ar = hw->priv;
1612 struct ieee80211_channel *chan;
1613 struct ieee80211_supported_band *band;
1614 int err, b, i;
1615
1616 chan = ar->channel;
1617 if (!chan)
1618 return -ENODEV;
1619
1620 if (idx == chan->hw_value) {
1621 mutex_lock(&ar->mutex);
1622 err = carl9170_update_survey(ar, false, true);
1623 mutex_unlock(&ar->mutex);
1624 if (err)
1625 return err;
1626 }
1627
1628 for (b = 0; b < NUM_NL80211_BANDS; b++) {
1629 band = ar->hw->wiphy->bands[b];
1630
1631 if (!band)
1632 continue;
1633
1634 for (i = 0; i < band->n_channels; i++) {
1635 if (band->channels[i].hw_value == idx) {
1636 chan = &band->channels[i];
1637 goto found;
1638 }
1639 }
1640 }
1641 return -ENOENT;
1642
1643found:
1644 memcpy(survey, &ar->survey[idx], sizeof(*survey));
1645
1646 survey->channel = chan;
1647 survey->filled = SURVEY_INFO_NOISE_DBM;
1648
1649 if (ar->channel == chan)
1650 survey->filled |= SURVEY_INFO_IN_USE;
1651
1652 if (ar->fw.hw_counters) {
1653 survey->filled |= SURVEY_INFO_TIME |
1654 SURVEY_INFO_TIME_BUSY |
1655 SURVEY_INFO_TIME_TX;
1656 }
1657
1658 return 0;
1659}
1660
1661static void carl9170_op_flush(struct ieee80211_hw *hw,
1662 struct ieee80211_vif *vif,
1663 u32 queues, bool drop)
1664{
1665 struct ar9170 *ar = hw->priv;
1666 unsigned int vid;
1667
1668 mutex_lock(&ar->mutex);
1669 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1670 carl9170_flush_cab(ar, vid);
1671
1672 carl9170_flush(ar, drop);
1673 mutex_unlock(&ar->mutex);
1674}
1675
1676static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1677 struct ieee80211_low_level_stats *stats)
1678{
1679 struct ar9170 *ar = hw->priv;
1680
1681 memset(stats, 0, sizeof(*stats));
1682 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1683 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1684 return 0;
1685}
1686
1687static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1688 struct ieee80211_vif *vif,
1689 enum sta_notify_cmd cmd,
1690 struct ieee80211_sta *sta)
1691{
1692 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1693
1694 switch (cmd) {
1695 case STA_NOTIFY_SLEEP:
1696 sta_info->sleeping = true;
1697 if (atomic_read(&sta_info->pending_frames))
1698 ieee80211_sta_block_awake(hw, sta, true);
1699 break;
1700
1701 case STA_NOTIFY_AWAKE:
1702 sta_info->sleeping = false;
1703 break;
1704 }
1705}
1706
1707static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
1708{
1709 struct ar9170 *ar = hw->priv;
1710
1711 return !!atomic_read(&ar->tx_total_queued);
1712}
1713
1714static const struct ieee80211_ops carl9170_ops = {
1715 .start = carl9170_op_start,
1716 .stop = carl9170_op_stop,
1717 .tx = carl9170_op_tx,
1718 .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1719 .flush = carl9170_op_flush,
1720 .add_interface = carl9170_op_add_interface,
1721 .remove_interface = carl9170_op_remove_interface,
1722 .config = carl9170_op_config,
1723 .prepare_multicast = carl9170_op_prepare_multicast,
1724 .configure_filter = carl9170_op_configure_filter,
1725 .conf_tx = carl9170_op_conf_tx,
1726 .bss_info_changed = carl9170_op_bss_info_changed,
1727 .get_tsf = carl9170_op_get_tsf,
1728 .set_key = carl9170_op_set_key,
1729 .sta_add = carl9170_op_sta_add,
1730 .sta_remove = carl9170_op_sta_remove,
1731 .sta_notify = carl9170_op_sta_notify,
1732 .get_survey = carl9170_op_get_survey,
1733 .get_stats = carl9170_op_get_stats,
1734 .ampdu_action = carl9170_op_ampdu_action,
1735 .tx_frames_pending = carl9170_tx_frames_pending,
1736};
1737
1738void *carl9170_alloc(size_t priv_size)
1739{
1740 struct ieee80211_hw *hw;
1741 struct ar9170 *ar;
1742 struct sk_buff *skb;
1743 int i;
1744
1745 /*
1746 * this buffer is used for rx stream reconstruction.
1747 * Under heavy load this device (or the transport layer?)
1748 * tends to split the streams into separate rx descriptors.
1749 */
1750
1751 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1752 if (!skb)
1753 goto err_nomem;
1754
1755 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1756 if (!hw)
1757 goto err_nomem;
1758
1759 ar = hw->priv;
1760 ar->hw = hw;
1761 ar->rx_failover = skb;
1762
1763 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1764 ar->rx_has_plcp = false;
1765
1766 /*
1767 * Here's a hidden pitfall!
1768 *
1769 * All 4 AC queues work perfectly well under _legacy_ operation.
1770 * However as soon as aggregation is enabled, the traffic flow
1771 * gets very bumpy. Therefore we have to _switch_ to a
1772 * software AC with a single HW queue.
1773 */
1774 hw->queues = __AR9170_NUM_TXQ;
1775
1776 mutex_init(&ar->mutex);
1777 spin_lock_init(&ar->beacon_lock);
1778 spin_lock_init(&ar->cmd_lock);
1779 spin_lock_init(&ar->tx_stats_lock);
1780 spin_lock_init(&ar->tx_ampdu_list_lock);
1781 spin_lock_init(&ar->mem_lock);
1782 spin_lock_init(&ar->state_lock);
1783 atomic_set(&ar->pending_restarts, 0);
1784 ar->vifs = 0;
1785 for (i = 0; i < ar->hw->queues; i++) {
1786 skb_queue_head_init(&ar->tx_status[i]);
1787 skb_queue_head_init(&ar->tx_pending[i]);
1788
1789 INIT_LIST_HEAD(&ar->bar_list[i]);
1790 spin_lock_init(&ar->bar_list_lock[i]);
1791 }
1792 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1793 INIT_WORK(&ar->ping_work, carl9170_ping_work);
1794 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1795 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1796 INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
1797 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1798 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1799 rcu_assign_pointer(ar->tx_ampdu_iter,
1800 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1801
1802 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1803 INIT_LIST_HEAD(&ar->vif_list);
1804 init_completion(&ar->tx_flush);
1805
1806 /* firmware decides which modes we support */
1807 hw->wiphy->interface_modes = 0;
1808
1809 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1810 ieee80211_hw_set(hw, MFP_CAPABLE);
1811 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1812 ieee80211_hw_set(hw, SUPPORTS_PS);
1813 ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
1814 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
1815 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
1816 ieee80211_hw_set(hw, SIGNAL_DBM);
1817 ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
1818
1819 if (!modparam_noht) {
1820 /*
1821 * see the comment above, why we allow the user
1822 * to disable HT by a module parameter.
1823 */
1824 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1825 }
1826
1827 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1828 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1829 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1830
1831 hw->max_rates = CARL9170_TX_MAX_RATES;
1832 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1833
1834 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1835 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1836
1837 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1838
1839 return ar;
1840
1841err_nomem:
1842 kfree_skb(skb);
1843 return ERR_PTR(-ENOMEM);
1844}
1845
1846static int carl9170_read_eeprom(struct ar9170 *ar)
1847{
1848#define RW 8 /* number of words to read at once */
1849#define RB (sizeof(u32) * RW)
1850 u8 *eeprom = (void *)&ar->eeprom;
1851 __le32 offsets[RW];
1852 int i, j, err;
1853
1854 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1855
1856 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1857#ifndef __CHECKER__
1858 /* don't want to handle trailing remains */
1859 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1860#endif
1861
1862 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) {
1863 for (j = 0; j < RW; j++)
1864 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1865 RB * i + 4 * j);
1866
1867 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1868 RB, (u8 *) &offsets,
1869 RB, eeprom + RB * i);
1870 if (err)
1871 return err;
1872 }
1873
1874#undef RW
1875#undef RB
1876 return 0;
1877}
1878
1879static int carl9170_parse_eeprom(struct ar9170 *ar)
1880{
1881 struct ath_regulatory *regulatory = &ar->common.regulatory;
1882 unsigned int rx_streams, tx_streams, tx_params = 0;
1883 int bands = 0;
1884 int chans = 0;
1885
1886 if (ar->eeprom.length == cpu_to_le16(0xffff))
1887 return -ENODATA;
1888
1889 rx_streams = hweight8(ar->eeprom.rx_mask);
1890 tx_streams = hweight8(ar->eeprom.tx_mask);
1891
1892 if (rx_streams != tx_streams) {
1893 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1894
1895 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1896 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1897
1898 tx_params |= (tx_streams - 1) <<
1899 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1900
1901 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1902 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1903 }
1904
1905 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1906 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] =
1907 &carl9170_band_2GHz;
1908 chans += carl9170_band_2GHz.n_channels;
1909 bands++;
1910 }
1911 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1912 ar->hw->wiphy->bands[NL80211_BAND_5GHZ] =
1913 &carl9170_band_5GHz;
1914 chans += carl9170_band_5GHz.n_channels;
1915 bands++;
1916 }
1917
1918 if (!bands)
1919 return -EINVAL;
1920
1921 ar->survey = devm_kcalloc(&ar->udev->dev, chans,
1922 sizeof(struct survey_info), GFP_KERNEL);
1923 if (!ar->survey)
1924 return -ENOMEM;
1925 ar->num_channels = chans;
1926
1927 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1928
1929 /* second part of wiphy init */
1930 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1931
1932 return 0;
1933}
1934
1935static void carl9170_reg_notifier(struct wiphy *wiphy,
1936 struct regulatory_request *request)
1937{
1938 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1939 struct ar9170 *ar = hw->priv;
1940
1941 ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1942}
1943
1944int carl9170_register(struct ar9170 *ar)
1945{
1946 struct ath_regulatory *regulatory = &ar->common.regulatory;
1947 int err = 0, i;
1948
1949 ar->mem_bitmap = devm_bitmap_zalloc(&ar->udev->dev, ar->fw.mem_blocks, GFP_KERNEL);
1950 if (!ar->mem_bitmap)
1951 return -ENOMEM;
1952
1953 /* try to read EEPROM, init MAC addr */
1954 err = carl9170_read_eeprom(ar);
1955 if (err)
1956 return err;
1957
1958 err = carl9170_parse_eeprom(ar);
1959 if (err)
1960 return err;
1961
1962 err = ath_regd_init(regulatory, ar->hw->wiphy,
1963 carl9170_reg_notifier);
1964 if (err)
1965 return err;
1966
1967 if (modparam_noht) {
1968 carl9170_band_2GHz.ht_cap.ht_supported = false;
1969 carl9170_band_5GHz.ht_cap.ht_supported = false;
1970 }
1971
1972 for (i = 0; i < ar->fw.vif_num; i++) {
1973 ar->vif_priv[i].id = i;
1974 ar->vif_priv[i].vif = NULL;
1975 }
1976
1977 err = ieee80211_register_hw(ar->hw);
1978 if (err)
1979 return err;
1980
1981 /* mac80211 interface is now registered */
1982 ar->registered = true;
1983
1984 if (!ath_is_world_regd(regulatory))
1985 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
1986
1987#ifdef CONFIG_CARL9170_DEBUGFS
1988 carl9170_debugfs_register(ar);
1989#endif /* CONFIG_CARL9170_DEBUGFS */
1990
1991 err = carl9170_led_init(ar);
1992 if (err)
1993 goto err_unreg;
1994
1995#ifdef CONFIG_CARL9170_LEDS
1996 err = carl9170_led_register(ar);
1997 if (err)
1998 goto err_unreg;
1999#endif /* CONFIG_CARL9170_LEDS */
2000
2001#ifdef CONFIG_CARL9170_WPC
2002 err = carl9170_register_wps_button(ar);
2003 if (err)
2004 goto err_unreg;
2005#endif /* CONFIG_CARL9170_WPC */
2006
2007#ifdef CONFIG_CARL9170_HWRNG
2008 err = carl9170_register_hwrng(ar);
2009 if (err)
2010 goto err_unreg;
2011#endif /* CONFIG_CARL9170_HWRNG */
2012
2013 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
2014 wiphy_name(ar->hw->wiphy));
2015
2016 return 0;
2017
2018err_unreg:
2019 carl9170_unregister(ar);
2020 return err;
2021}
2022
2023void carl9170_unregister(struct ar9170 *ar)
2024{
2025 if (!ar->registered)
2026 return;
2027
2028 ar->registered = false;
2029
2030#ifdef CONFIG_CARL9170_LEDS
2031 carl9170_led_unregister(ar);
2032#endif /* CONFIG_CARL9170_LEDS */
2033
2034#ifdef CONFIG_CARL9170_DEBUGFS
2035 carl9170_debugfs_unregister(ar);
2036#endif /* CONFIG_CARL9170_DEBUGFS */
2037
2038 carl9170_cancel_worker(ar);
2039 cancel_work_sync(&ar->restart_work);
2040
2041 ieee80211_unregister_hw(ar->hw);
2042}
2043
2044void carl9170_free(struct ar9170 *ar)
2045{
2046 WARN_ON(ar->registered);
2047 WARN_ON(IS_INITIALIZED(ar));
2048
2049 kfree_skb(ar->rx_failover);
2050 ar->rx_failover = NULL;
2051
2052 mutex_destroy(&ar->mutex);
2053
2054 ieee80211_free_hw(ar->hw);
2055}