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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / wireless / ath / carl9170 / main.c
blob5914926a5c5b8add0e387dff9dea1b39559f24e8
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
50 static bool modparam_nohwcrypt;
51 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
52 MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
53
54 int modparam_noht;
55 module_param_named(noht, modparam_noht, int, 0444);
56 MODULE_PARM_DESC(noht, "Disable MPDU aggregation.");
57
58 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
59 .bitrate = (_bitrate), \
60 .flags = (_flags), \
61 .hw_value = (_hw_rate) | (_txpidx) << 4, \
62 }
63
64 struct ieee80211_rate __carl9170_ratetable[] = {
65 RATE(10, 0, 0, 0),
66 RATE(20, 1, 1, IEEE80211_RATE_SHORT_PREAMBLE),
67 RATE(55, 2, 2, IEEE80211_RATE_SHORT_PREAMBLE),
68 RATE(110, 3, 3, IEEE80211_RATE_SHORT_PREAMBLE),
69 RATE(60, 0xb, 0, 0),
70 RATE(90, 0xf, 0, 0),
71 RATE(120, 0xa, 0, 0),
72 RATE(180, 0xe, 0, 0),
73 RATE(240, 0x9, 0, 0),
74 RATE(360, 0xd, 1, 0),
75 RATE(480, 0x8, 2, 0),
76 RATE(540, 0xc, 3, 0),
77 };
78 #undef RATE
79
80 #define carl9170_g_ratetable (__carl9170_ratetable + 0)
81 #define carl9170_g_ratetable_size 12
82 #define carl9170_a_ratetable (__carl9170_ratetable + 4)
83 #define carl9170_a_ratetable_size 8
84
85 /*
86 * NB: The hw_value is used as an index into the carl9170_phy_freq_params
87 * array in phy.c so that we don't have to do frequency lookups!
88 */
89 #define CHAN(_freq, _idx) { \
90 .center_freq = (_freq), \
91 .hw_value = (_idx), \
92 .max_power = 18, /* XXX */ \
93 }
94
95 static struct ieee80211_channel carl9170_2ghz_chantable[] = {
96 CHAN(2412, 0),
97 CHAN(2417, 1),
98 CHAN(2422, 2),
99 CHAN(2427, 3),
100 CHAN(2432, 4),
101 CHAN(2437, 5),
102 CHAN(2442, 6),
103 CHAN(2447, 7),
104 CHAN(2452, 8),
105 CHAN(2457, 9),
106 CHAN(2462, 10),
107 CHAN(2467, 11),
108 CHAN(2472, 12),
109 CHAN(2484, 13),
110 };
111
112 static struct ieee80211_channel carl9170_5ghz_chantable[] = {
113 CHAN(4920, 14),
114 CHAN(4940, 15),
115 CHAN(4960, 16),
116 CHAN(4980, 17),
117 CHAN(5040, 18),
118 CHAN(5060, 19),
119 CHAN(5080, 20),
120 CHAN(5180, 21),
121 CHAN(5200, 22),
122 CHAN(5220, 23),
123 CHAN(5240, 24),
124 CHAN(5260, 25),
125 CHAN(5280, 26),
126 CHAN(5300, 27),
127 CHAN(5320, 28),
128 CHAN(5500, 29),
129 CHAN(5520, 30),
130 CHAN(5540, 31),
131 CHAN(5560, 32),
132 CHAN(5580, 33),
133 CHAN(5600, 34),
134 CHAN(5620, 35),
135 CHAN(5640, 36),
136 CHAN(5660, 37),
137 CHAN(5680, 38),
138 CHAN(5700, 39),
139 CHAN(5745, 40),
140 CHAN(5765, 41),
141 CHAN(5785, 42),
142 CHAN(5805, 43),
143 CHAN(5825, 44),
144 CHAN(5170, 45),
145 CHAN(5190, 46),
146 CHAN(5210, 47),
147 CHAN(5230, 48),
148 };
149 #undef CHAN
150
151 #define CARL9170_HT_CAP \
152 { \
153 .ht_supported = true, \
154 .cap = IEEE80211_HT_CAP_MAX_AMSDU | \
155 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | \
156 IEEE80211_HT_CAP_SGI_40 | \
157 IEEE80211_HT_CAP_DSSSCCK40 | \
158 IEEE80211_HT_CAP_SM_PS, \
159 .ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K, \
160 .ampdu_density = IEEE80211_HT_MPDU_DENSITY_8, \
161 .mcs = { \
162 .rx_mask = { 0xff, 0xff, 0, 0, 0x1, 0, 0, 0, 0, 0, }, \
163 .rx_highest = cpu_to_le16(300), \
164 .tx_params = IEEE80211_HT_MCS_TX_DEFINED, \
165 }, \
166 }
167
168 static struct ieee80211_supported_band carl9170_band_2GHz = {
169 .channels = carl9170_2ghz_chantable,
170 .n_channels = ARRAY_SIZE(carl9170_2ghz_chantable),
171 .bitrates = carl9170_g_ratetable,
172 .n_bitrates = carl9170_g_ratetable_size,
173 .ht_cap = CARL9170_HT_CAP,
174 };
175
176 static struct ieee80211_supported_band carl9170_band_5GHz = {
177 .channels = carl9170_5ghz_chantable,
178 .n_channels = ARRAY_SIZE(carl9170_5ghz_chantable),
179 .bitrates = carl9170_a_ratetable,
180 .n_bitrates = carl9170_a_ratetable_size,
181 .ht_cap = CARL9170_HT_CAP,
182 };
183
184 static void carl9170_ampdu_gc(struct ar9170 *ar)
185 {
186 struct carl9170_sta_tid *tid_info;
187 LIST_HEAD(tid_gc);
188
189 rcu_read_lock();
190 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
191 spin_lock_bh(&ar->tx_ampdu_list_lock);
192 if (tid_info->state == CARL9170_TID_STATE_SHUTDOWN) {
193 tid_info->state = CARL9170_TID_STATE_KILLED;
194 list_del_rcu(&tid_info->list);
195 ar->tx_ampdu_list_len--;
196 list_add_tail(&tid_info->tmp_list, &tid_gc);
197 }
198 spin_unlock_bh(&ar->tx_ampdu_list_lock);
199
200 }
201 rcu_assign_pointer(ar->tx_ampdu_iter, tid_info);
202 rcu_read_unlock();
203
204 synchronize_rcu();
205
206 while (!list_empty(&tid_gc)) {
207 struct sk_buff *skb;
208 tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid,
209 tmp_list);
210
211 while ((skb = __skb_dequeue(&tid_info->queue)))
212 carl9170_tx_status(ar, skb, false);
213
214 list_del_init(&tid_info->tmp_list);
215 kfree(tid_info);
216 }
217 }
218
219 static void carl9170_flush(struct ar9170 *ar, bool drop_queued)
220 {
221 if (drop_queued) {
222 int i;
223
224 /*
225 * We can only drop frames which have not been uploaded
226 * to the device yet.
227 */
228
229 for (i = 0; i < ar->hw->queues; i++) {
230 struct sk_buff *skb;
231
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
249 static void carl9170_flush_ba(struct ar9170 *ar)
250 {
251 struct sk_buff_head free;
252 struct carl9170_sta_tid *tid_info;
253 struct sk_buff *skb;
254
255 __skb_queue_head_init(&free);
256
257 rcu_read_lock();
258 spin_lock_bh(&ar->tx_ampdu_list_lock);
259 list_for_each_entry_rcu(tid_info, &ar->tx_ampdu_list, list) {
260 if (tid_info->state > CARL9170_TID_STATE_SUSPEND) {
261 tid_info->state = CARL9170_TID_STATE_SUSPEND;
262
263 spin_lock(&tid_info->lock);
264 while ((skb = __skb_dequeue(&tid_info->queue)))
265 __skb_queue_tail(&free, skb);
266 spin_unlock(&tid_info->lock);
267 }
268 }
269 spin_unlock_bh(&ar->tx_ampdu_list_lock);
270 rcu_read_unlock();
271
272 while ((skb = __skb_dequeue(&free)))
273 carl9170_tx_status(ar, skb, false);
274 }
275
276 static void carl9170_zap_queues(struct ar9170 *ar)
277 {
278 struct carl9170_vif_info *cvif;
279 unsigned int i;
280
281 carl9170_ampdu_gc(ar);
282
283 carl9170_flush_ba(ar);
284 carl9170_flush(ar, true);
285
286 for (i = 0; i < ar->hw->queues; i++) {
287 spin_lock_bh(&ar->tx_status[i].lock);
288 while (!skb_queue_empty(&ar->tx_status[i])) {
289 struct sk_buff *skb;
290
291 skb = skb_peek(&ar->tx_status[i]);
292 carl9170_tx_get_skb(skb);
293 spin_unlock_bh(&ar->tx_status[i].lock);
294 carl9170_tx_drop(ar, skb);
295 spin_lock_bh(&ar->tx_status[i].lock);
296 carl9170_tx_put_skb(skb);
297 }
298 spin_unlock_bh(&ar->tx_status[i].lock);
299 }
300
301 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_SOFT < 1);
302 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD < CARL9170_NUM_TX_LIMIT_SOFT);
303 BUILD_BUG_ON(CARL9170_NUM_TX_LIMIT_HARD >= CARL9170_BAW_BITS);
304
305 /* reinitialize queues statistics */
306 memset(&ar->tx_stats, 0, sizeof(ar->tx_stats));
307 for (i = 0; i < ar->hw->queues; i++)
308 ar->tx_stats[i].limit = CARL9170_NUM_TX_LIMIT_HARD;
309
310 for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++)
311 ar->mem_bitmap[i] = 0;
312
313 rcu_read_lock();
314 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
315 spin_lock_bh(&ar->beacon_lock);
316 dev_kfree_skb_any(cvif->beacon);
317 cvif->beacon = NULL;
318 spin_unlock_bh(&ar->beacon_lock);
319 }
320 rcu_read_unlock();
321
322 atomic_set(&ar->tx_ampdu_upload, 0);
323 atomic_set(&ar->tx_ampdu_scheduler, 0);
324 atomic_set(&ar->tx_total_pending, 0);
325 atomic_set(&ar->tx_total_queued, 0);
326 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
327 }
328
329 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
330 do { \
331 queue.aifs = ai_fs; \
332 queue.cw_min = cwmin; \
333 queue.cw_max = cwmax; \
334 queue.txop = _txop; \
335 } while (0)
336
337 static int carl9170_op_start(struct ieee80211_hw *hw)
338 {
339 struct ar9170 *ar = hw->priv;
340 int err, i;
341
342 mutex_lock(&ar->mutex);
343
344 carl9170_zap_queues(ar);
345
346 /* reset QoS defaults */
347 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47);
348 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94);
349 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0);
350 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0);
351 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0);
352
353 ar->current_factor = ar->current_density = -1;
354 /* "The first key is unique." */
355 ar->usedkeys = 1;
356 ar->filter_state = 0;
357 ar->ps.last_action = jiffies;
358 ar->ps.last_slept = jiffies;
359 ar->erp_mode = CARL9170_ERP_AUTO;
360
361 /* Set "disable hw crypto offload" whenever the module parameter
362 * nohwcrypt is true or if the firmware does not support it.
363 */
364 ar->disable_offload = modparam_nohwcrypt |
365 ar->fw.disable_offload_fw;
366 ar->rx_software_decryption = ar->disable_offload;
367
368 for (i = 0; i < ar->hw->queues; i++) {
369 ar->queue_stop_timeout[i] = jiffies;
370 ar->max_queue_stop_timeout[i] = 0;
371 }
372
373 atomic_set(&ar->mem_allocs, 0);
374
375 err = carl9170_usb_open(ar);
376 if (err)
377 goto out;
378
379 err = carl9170_init_mac(ar);
380 if (err)
381 goto out;
382
383 err = carl9170_set_qos(ar);
384 if (err)
385 goto out;
386
387 if (ar->fw.rx_filter) {
388 err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA |
389 CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD);
390 if (err)
391 goto out;
392 }
393
394 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
395 AR9170_DMA_TRIGGER_RXQ);
396 if (err)
397 goto out;
398
399 /* Clear key-cache */
400 for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) {
401 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
402 0, NULL, 0);
403 if (err)
404 goto out;
405
406 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
407 1, NULL, 0);
408 if (err)
409 goto out;
410
411 if (i < AR9170_CAM_MAX_USER) {
412 err = carl9170_disable_key(ar, i);
413 if (err)
414 goto out;
415 }
416 }
417
418 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
419
420 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
421 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
422
423 ieee80211_wake_queues(ar->hw);
424 err = 0;
425
426 out:
427 mutex_unlock(&ar->mutex);
428 return err;
429 }
430
431 static void carl9170_cancel_worker(struct ar9170 *ar)
432 {
433 cancel_delayed_work_sync(&ar->stat_work);
434 cancel_delayed_work_sync(&ar->tx_janitor);
435 #ifdef CONFIG_CARL9170_LEDS
436 cancel_delayed_work_sync(&ar->led_work);
437 #endif /* CONFIG_CARL9170_LEDS */
438 cancel_work_sync(&ar->ps_work);
439 cancel_work_sync(&ar->ping_work);
440 cancel_work_sync(&ar->ampdu_work);
441 }
442
443 static void carl9170_op_stop(struct ieee80211_hw *hw)
444 {
445 struct ar9170 *ar = hw->priv;
446
447 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
448
449 ieee80211_stop_queues(ar->hw);
450
451 mutex_lock(&ar->mutex);
452 if (IS_ACCEPTING_CMD(ar)) {
453 RCU_INIT_POINTER(ar->beacon_iter, NULL);
454
455 carl9170_led_set_state(ar, 0);
456
457 /* stop DMA */
458 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
459 carl9170_usb_stop(ar);
460 }
461
462 carl9170_zap_queues(ar);
463 mutex_unlock(&ar->mutex);
464
465 carl9170_cancel_worker(ar);
466 }
467
468 static void carl9170_restart_work(struct work_struct *work)
469 {
470 struct ar9170 *ar = container_of(work, struct ar9170,
471 restart_work);
472 int err = -EIO;
473
474 ar->usedkeys = 0;
475 ar->filter_state = 0;
476 carl9170_cancel_worker(ar);
477
478 mutex_lock(&ar->mutex);
479 if (!ar->force_usb_reset) {
480 err = carl9170_usb_restart(ar);
481 if (net_ratelimit()) {
482 if (err)
483 dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err);
484 else
485 dev_info(&ar->udev->dev, "device restarted successfully.\n");
486 }
487 }
488 carl9170_zap_queues(ar);
489 mutex_unlock(&ar->mutex);
490
491 if (!err && !ar->force_usb_reset) {
492 ar->restart_counter++;
493 atomic_set(&ar->pending_restarts, 0);
494
495 ieee80211_restart_hw(ar->hw);
496 } else {
497 /*
498 * The reset was unsuccessful and the device seems to
499 * be dead. But there's still one option: a low-level
500 * usb subsystem reset...
501 */
502
503 carl9170_usb_reset(ar);
504 }
505 }
506
507 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
508 {
509 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
510
511 /*
512 * Sometimes, an error can trigger several different reset events.
513 * By ignoring these *surplus* reset events, the device won't be
514 * killed again, right after it has recovered.
515 */
516 if (atomic_inc_return(&ar->pending_restarts) > 1) {
517 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
518 return;
519 }
520
521 ieee80211_stop_queues(ar->hw);
522
523 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
524
525 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
526 !WARN_ON(r >= __CARL9170_RR_LAST))
527 ar->last_reason = r;
528
529 if (!ar->registered)
530 return;
531
532 if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset)
533 ar->force_usb_reset = true;
534
535 ieee80211_queue_work(ar->hw, &ar->restart_work);
536
537 /*
538 * At this point, the device instance might have vanished/disabled.
539 * So, don't put any code which access the ar9170 struct
540 * without proper protection.
541 */
542 }
543
544 static void carl9170_ping_work(struct work_struct *work)
545 {
546 struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
547 int err;
548
549 if (!IS_STARTED(ar))
550 return;
551
552 mutex_lock(&ar->mutex);
553 err = carl9170_echo_test(ar, 0xdeadbeef);
554 if (err)
555 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
556 mutex_unlock(&ar->mutex);
557 }
558
559 static int carl9170_init_interface(struct ar9170 *ar,
560 struct ieee80211_vif *vif)
561 {
562 struct ath_common *common = &ar->common;
563 int err;
564
565 if (!vif) {
566 WARN_ON_ONCE(IS_STARTED(ar));
567 return 0;
568 }
569
570 memcpy(common->macaddr, vif->addr, ETH_ALEN);
571
572 /* We have to fall back to software crypto, whenever
573 * the user choose to participates in an IBSS. HW
574 * offload for IBSS RSN is not supported by this driver.
575 *
576 * NOTE: If the previous main interface has already
577 * disabled hw crypto offload, we have to keep this
578 * previous disable_offload setting as it was.
579 * Altough ideally, we should notify mac80211 and tell
580 * it to forget about any HW crypto offload for now.
581 */
582 ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) &&
583 (vif->type != NL80211_IFTYPE_AP));
584
585 /* While the driver supports HW offload in a single
586 * P2P client configuration, it doesn't support HW
587 * offload in the favourit, concurrent P2P GO+CLIENT
588 * configuration. Hence, HW offload will always be
589 * disabled for P2P.
590 */
591 ar->disable_offload |= vif->p2p;
592
593 ar->rx_software_decryption = ar->disable_offload;
594
595 err = carl9170_set_operating_mode(ar);
596 return err;
597 }
598
599 static int carl9170_op_add_interface(struct ieee80211_hw *hw,
600 struct ieee80211_vif *vif)
601 {
602 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
603 struct ieee80211_vif *main_vif, *old_main = NULL;
604 struct ar9170 *ar = hw->priv;
605 int vif_id = -1, err = 0;
606
607 mutex_lock(&ar->mutex);
608 rcu_read_lock();
609 if (vif_priv->active) {
610 /*
611 * Skip the interface structure initialization,
612 * if the vif survived the _restart call.
613 */
614 vif_id = vif_priv->id;
615 vif_priv->enable_beacon = false;
616
617 spin_lock_bh(&ar->beacon_lock);
618 dev_kfree_skb_any(vif_priv->beacon);
619 vif_priv->beacon = NULL;
620 spin_unlock_bh(&ar->beacon_lock);
621
622 goto init;
623 }
624
625 /* Because the AR9170 HW's MAC doesn't provide full support for
626 * multiple, independent interfaces [of different operation modes].
627 * We have to select ONE main interface [main mode of HW], but we
628 * can have multiple slaves [AKA: entry in the ACK-table].
629 *
630 * The first (from HEAD/TOP) interface in the ar->vif_list is
631 * always the main intf. All following intfs in this list
632 * are considered to be slave intfs.
633 */
634 main_vif = carl9170_get_main_vif(ar);
635
636 if (main_vif) {
637 switch (main_vif->type) {
638 case NL80211_IFTYPE_STATION:
639 if (vif->type == NL80211_IFTYPE_STATION)
640 break;
641
642 /* P2P GO [master] use-case
643 * Because the P2P GO station is selected dynamically
644 * by all participating peers of a WIFI Direct network,
645 * the driver has be able to change the main interface
646 * operating mode on the fly.
647 */
648 if (main_vif->p2p && vif->p2p &&
649 vif->type == NL80211_IFTYPE_AP) {
650 old_main = main_vif;
651 break;
652 }
653
654 err = -EBUSY;
655 rcu_read_unlock();
656
657 goto unlock;
658
659 case NL80211_IFTYPE_MESH_POINT:
660 case NL80211_IFTYPE_AP:
661 if ((vif->type == NL80211_IFTYPE_STATION) ||
662 (vif->type == NL80211_IFTYPE_WDS) ||
663 (vif->type == NL80211_IFTYPE_AP) ||
664 (vif->type == NL80211_IFTYPE_MESH_POINT))
665 break;
666
667 err = -EBUSY;
668 rcu_read_unlock();
669 goto unlock;
670
671 default:
672 rcu_read_unlock();
673 goto unlock;
674 }
675 }
676
677 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
678
679 if (vif_id < 0) {
680 rcu_read_unlock();
681
682 err = -ENOSPC;
683 goto unlock;
684 }
685
686 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
687
688 vif_priv->active = true;
689 vif_priv->id = vif_id;
690 vif_priv->enable_beacon = false;
691 ar->vifs++;
692 if (old_main) {
693 /* We end up in here, if the main interface is being replaced.
694 * Put the new main interface at the HEAD of the list and the
695 * previous inteface will automatically become second in line.
696 */
697 list_add_rcu(&vif_priv->list, &ar->vif_list);
698 } else {
699 /* Add new inteface. If the list is empty, it will become the
700 * main inteface, otherwise it will be slave.
701 */
702 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
703 }
704 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
705
706 init:
707 main_vif = carl9170_get_main_vif(ar);
708
709 if (main_vif == vif) {
710 rcu_assign_pointer(ar->beacon_iter, vif_priv);
711 rcu_read_unlock();
712
713 if (old_main) {
714 struct carl9170_vif_info *old_main_priv =
715 (void *) old_main->drv_priv;
716 /* downgrade old main intf to slave intf.
717 * NOTE: We are no longer under rcu_read_lock.
718 * But we are still holding ar->mutex, so the
719 * vif data [id, addr] is safe.
720 */
721 err = carl9170_mod_virtual_mac(ar, old_main_priv->id,
722 old_main->addr);
723 if (err)
724 goto unlock;
725 }
726
727 err = carl9170_init_interface(ar, vif);
728 if (err)
729 goto unlock;
730 } else {
731 rcu_read_unlock();
732 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
733
734 if (err)
735 goto unlock;
736 }
737
738 if (ar->fw.tx_seq_table) {
739 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
740 0);
741 if (err)
742 goto unlock;
743 }
744
745 unlock:
746 if (err && (vif_id >= 0)) {
747 vif_priv->active = false;
748 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
749 ar->vifs--;
750 RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL);
751 list_del_rcu(&vif_priv->list);
752 mutex_unlock(&ar->mutex);
753 synchronize_rcu();
754 } else {
755 if (ar->vifs > 1)
756 ar->ps.off_override |= PS_OFF_VIF;
757
758 mutex_unlock(&ar->mutex);
759 }
760
761 return err;
762 }
763
764 static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
765 struct ieee80211_vif *vif)
766 {
767 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
768 struct ieee80211_vif *main_vif;
769 struct ar9170 *ar = hw->priv;
770 unsigned int id;
771
772 mutex_lock(&ar->mutex);
773
774 if (WARN_ON_ONCE(!vif_priv->active))
775 goto unlock;
776
777 ar->vifs--;
778
779 rcu_read_lock();
780 main_vif = carl9170_get_main_vif(ar);
781
782 id = vif_priv->id;
783
784 vif_priv->active = false;
785 WARN_ON(vif_priv->enable_beacon);
786 vif_priv->enable_beacon = false;
787 list_del_rcu(&vif_priv->list);
788 RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL);
789
790 if (vif == main_vif) {
791 rcu_read_unlock();
792
793 if (ar->vifs) {
794 WARN_ON(carl9170_init_interface(ar,
795 carl9170_get_main_vif(ar)));
796 } else {
797 carl9170_set_operating_mode(ar);
798 }
799 } else {
800 rcu_read_unlock();
801
802 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
803 }
804
805 carl9170_update_beacon(ar, false);
806 carl9170_flush_cab(ar, id);
807
808 spin_lock_bh(&ar->beacon_lock);
809 dev_kfree_skb_any(vif_priv->beacon);
810 vif_priv->beacon = NULL;
811 spin_unlock_bh(&ar->beacon_lock);
812
813 bitmap_release_region(&ar->vif_bitmap, id, 0);
814
815 carl9170_set_beacon_timers(ar);
816
817 if (ar->vifs == 1)
818 ar->ps.off_override &= ~PS_OFF_VIF;
819
820 unlock:
821 mutex_unlock(&ar->mutex);
822
823 synchronize_rcu();
824 }
825
826 void carl9170_ps_check(struct ar9170 *ar)
827 {
828 ieee80211_queue_work(ar->hw, &ar->ps_work);
829 }
830
831 /* caller must hold ar->mutex */
832 static int carl9170_ps_update(struct ar9170 *ar)
833 {
834 bool ps = false;
835 int err = 0;
836
837 if (!ar->ps.off_override)
838 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
839
840 if (ps != ar->ps.state) {
841 err = carl9170_powersave(ar, ps);
842 if (err)
843 return err;
844
845 if (ar->ps.state && !ps) {
846 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
847 ar->ps.last_action);
848 }
849
850 if (ps)
851 ar->ps.last_slept = jiffies;
852
853 ar->ps.last_action = jiffies;
854 ar->ps.state = ps;
855 }
856
857 return 0;
858 }
859
860 static void carl9170_ps_work(struct work_struct *work)
861 {
862 struct ar9170 *ar = container_of(work, struct ar9170,
863 ps_work);
864 mutex_lock(&ar->mutex);
865 if (IS_STARTED(ar))
866 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
867 mutex_unlock(&ar->mutex);
868 }
869
870 static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
871 {
872 int err;
873
874 if (noise) {
875 err = carl9170_get_noisefloor(ar);
876 if (err)
877 return err;
878 }
879
880 if (ar->fw.hw_counters) {
881 err = carl9170_collect_tally(ar);
882 if (err)
883 return err;
884 }
885
886 if (flush)
887 memset(&ar->tally, 0, sizeof(ar->tally));
888
889 return 0;
890 }
891
892 static void carl9170_stat_work(struct work_struct *work)
893 {
894 struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
895 int err;
896
897 mutex_lock(&ar->mutex);
898 err = carl9170_update_survey(ar, false, true);
899 mutex_unlock(&ar->mutex);
900
901 if (err)
902 return;
903
904 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
905 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
906 }
907
908 static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
909 {
910 struct ar9170 *ar = hw->priv;
911 int err = 0;
912
913 mutex_lock(&ar->mutex);
914 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
915 /* TODO */
916 err = 0;
917 }
918
919 if (changed & IEEE80211_CONF_CHANGE_PS) {
920 err = carl9170_ps_update(ar);
921 if (err)
922 goto out;
923 }
924
925 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
926 /* TODO */
927 err = 0;
928 }
929
930 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
931 enum nl80211_channel_type channel_type =
932 cfg80211_get_chandef_type(&hw->conf.chandef);
933
934 /* adjust slot time for 5 GHz */
935 err = carl9170_set_slot_time(ar);
936 if (err)
937 goto out;
938
939 err = carl9170_update_survey(ar, true, false);
940 if (err)
941 goto out;
942
943 err = carl9170_set_channel(ar, hw->conf.chandef.chan,
944 channel_type);
945 if (err)
946 goto out;
947
948 err = carl9170_update_survey(ar, false, true);
949 if (err)
950 goto out;
951
952 err = carl9170_set_dyn_sifs_ack(ar);
953 if (err)
954 goto out;
955
956 err = carl9170_set_rts_cts_rate(ar);
957 if (err)
958 goto out;
959 }
960
961 if (changed & IEEE80211_CONF_CHANGE_POWER) {
962 err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan);
963 if (err)
964 goto out;
965 }
966
967 out:
968 mutex_unlock(&ar->mutex);
969 return err;
970 }
971
972 static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
973 struct netdev_hw_addr_list *mc_list)
974 {
975 struct netdev_hw_addr *ha;
976 u64 mchash;
977
978 /* always get broadcast frames */
979 mchash = 1ULL << (0xff >> 2);
980
981 netdev_hw_addr_list_for_each(ha, mc_list)
982 mchash |= 1ULL << (ha->addr[5] >> 2);
983
984 return mchash;
985 }
986
987 static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
988 unsigned int changed_flags,
989 unsigned int *new_flags,
990 u64 multicast)
991 {
992 struct ar9170 *ar = hw->priv;
993
994 /* mask supported flags */
995 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
996
997 if (!IS_ACCEPTING_CMD(ar))
998 return;
999
1000 mutex_lock(&ar->mutex);
1001
1002 ar->filter_state = *new_flags;
1003 /*
1004 * We can support more by setting the sniffer bit and
1005 * then checking the error flags, later.
1006 */
1007
1008 if (*new_flags & FIF_ALLMULTI)
1009 multicast = ~0ULL;
1010
1011 if (multicast != ar->cur_mc_hash)
1012 WARN_ON(carl9170_update_multicast(ar, multicast));
1013
1014 if (changed_flags & FIF_OTHER_BSS) {
1015 ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS);
1016
1017 WARN_ON(carl9170_set_operating_mode(ar));
1018 }
1019
1020 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
1021 u32 rx_filter = 0;
1022
1023 if (!ar->fw.ba_filter)
1024 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1025
1026 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
1027 rx_filter |= CARL9170_RX_FILTER_BAD;
1028
1029 if (!(*new_flags & FIF_CONTROL))
1030 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1031
1032 if (!(*new_flags & FIF_PSPOLL))
1033 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
1034
1035 if (!(*new_flags & FIF_OTHER_BSS)) {
1036 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
1037 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
1038 }
1039
1040 WARN_ON(carl9170_rx_filter(ar, rx_filter));
1041 }
1042
1043 mutex_unlock(&ar->mutex);
1044 }
1045
1046
1047 static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
1048 struct ieee80211_vif *vif,
1049 struct ieee80211_bss_conf *bss_conf,
1050 u32 changed)
1051 {
1052 struct ar9170 *ar = hw->priv;
1053 struct ath_common *common = &ar->common;
1054 int err = 0;
1055 struct carl9170_vif_info *vif_priv;
1056 struct ieee80211_vif *main_vif;
1057
1058 mutex_lock(&ar->mutex);
1059 vif_priv = (void *) vif->drv_priv;
1060 main_vif = carl9170_get_main_vif(ar);
1061 if (WARN_ON(!main_vif))
1062 goto out;
1063
1064 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1065 struct carl9170_vif_info *iter;
1066 int i = 0;
1067
1068 vif_priv->enable_beacon = bss_conf->enable_beacon;
1069 rcu_read_lock();
1070 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
1071 if (iter->active && iter->enable_beacon)
1072 i++;
1073
1074 }
1075 rcu_read_unlock();
1076
1077 ar->beacon_enabled = i;
1078 }
1079
1080 if (changed & BSS_CHANGED_BEACON) {
1081 err = carl9170_update_beacon(ar, false);
1082 if (err)
1083 goto out;
1084 }
1085
1086 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
1087 BSS_CHANGED_BEACON_INT)) {
1088
1089 if (main_vif != vif) {
1090 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
1091 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
1092 }
1093
1094 /*
1095 * Therefore a hard limit for the broadcast traffic should
1096 * prevent false alarms.
1097 */
1098 if (vif->type != NL80211_IFTYPE_STATION &&
1099 (bss_conf->beacon_int * bss_conf->dtim_period >=
1100 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
1101 err = -EINVAL;
1102 goto out;
1103 }
1104
1105 err = carl9170_set_beacon_timers(ar);
1106 if (err)
1107 goto out;
1108 }
1109
1110 if (changed & BSS_CHANGED_HT) {
1111 /* TODO */
1112 err = 0;
1113 if (err)
1114 goto out;
1115 }
1116
1117 if (main_vif != vif)
1118 goto out;
1119
1120 /*
1121 * The following settings can only be changed by the
1122 * master interface.
1123 */
1124
1125 if (changed & BSS_CHANGED_BSSID) {
1126 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1127 err = carl9170_set_operating_mode(ar);
1128 if (err)
1129 goto out;
1130 }
1131
1132 if (changed & BSS_CHANGED_ASSOC) {
1133 ar->common.curaid = bss_conf->aid;
1134 err = carl9170_set_beacon_timers(ar);
1135 if (err)
1136 goto out;
1137 }
1138
1139 if (changed & BSS_CHANGED_ERP_SLOT) {
1140 err = carl9170_set_slot_time(ar);
1141 if (err)
1142 goto out;
1143 }
1144
1145 if (changed & BSS_CHANGED_BASIC_RATES) {
1146 err = carl9170_set_mac_rates(ar);
1147 if (err)
1148 goto out;
1149 }
1150
1151 out:
1152 WARN_ON_ONCE(err && IS_STARTED(ar));
1153 mutex_unlock(&ar->mutex);
1154 }
1155
1156 static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw,
1157 struct ieee80211_vif *vif)
1158 {
1159 struct ar9170 *ar = hw->priv;
1160 struct carl9170_tsf_rsp tsf;
1161 int err;
1162
1163 mutex_lock(&ar->mutex);
1164 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1165 0, NULL, sizeof(tsf), &tsf);
1166 mutex_unlock(&ar->mutex);
1167 if (WARN_ON(err))
1168 return 0;
1169
1170 return le64_to_cpu(tsf.tsf_64);
1171 }
1172
1173 static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1174 struct ieee80211_vif *vif,
1175 struct ieee80211_sta *sta,
1176 struct ieee80211_key_conf *key)
1177 {
1178 struct ar9170 *ar = hw->priv;
1179 int err = 0, i;
1180 u8 ktype;
1181
1182 if (ar->disable_offload || !vif)
1183 return -EOPNOTSUPP;
1184
1185 /* Fall back to software encryption whenever the driver is connected
1186 * to more than one network.
1187 *
1188 * This is very unfortunate, because some machines cannot handle
1189 * the high througput speed in 802.11n networks.
1190 */
1191
1192 if (!is_main_vif(ar, vif)) {
1193 mutex_lock(&ar->mutex);
1194 goto err_softw;
1195 }
1196
1197 /*
1198 * While the hardware supports *catch-all* key, for offloading
1199 * group-key en-/de-cryption. The way of how the hardware
1200 * decides which keyId maps to which key, remains a mystery...
1201 */
1202 if ((vif->type != NL80211_IFTYPE_STATION &&
1203 vif->type != NL80211_IFTYPE_ADHOC) &&
1204 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1205 return -EOPNOTSUPP;
1206
1207 switch (key->cipher) {
1208 case WLAN_CIPHER_SUITE_WEP40:
1209 ktype = AR9170_ENC_ALG_WEP64;
1210 break;
1211 case WLAN_CIPHER_SUITE_WEP104:
1212 ktype = AR9170_ENC_ALG_WEP128;
1213 break;
1214 case WLAN_CIPHER_SUITE_TKIP:
1215 ktype = AR9170_ENC_ALG_TKIP;
1216 break;
1217 case WLAN_CIPHER_SUITE_CCMP:
1218 ktype = AR9170_ENC_ALG_AESCCMP;
1219 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1220 break;
1221 default:
1222 return -EOPNOTSUPP;
1223 }
1224
1225 mutex_lock(&ar->mutex);
1226 if (cmd == SET_KEY) {
1227 if (!IS_STARTED(ar)) {
1228 err = -EOPNOTSUPP;
1229 goto out;
1230 }
1231
1232 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1233 sta = NULL;
1234
1235 i = 64 + key->keyidx;
1236 } else {
1237 for (i = 0; i < 64; i++)
1238 if (!(ar->usedkeys & BIT(i)))
1239 break;
1240 if (i == 64)
1241 goto err_softw;
1242 }
1243
1244 key->hw_key_idx = i;
1245
1246 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1247 ktype, 0, key->key,
1248 min_t(u8, 16, key->keylen));
1249 if (err)
1250 goto out;
1251
1252 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1253 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1254 NULL, ktype, 1,
1255 key->key + 16, 16);
1256 if (err)
1257 goto out;
1258
1259 /*
1260 * hardware is not capable generating MMIC
1261 * of fragmented frames!
1262 */
1263 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1264 }
1265
1266 if (i < 64)
1267 ar->usedkeys |= BIT(i);
1268
1269 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1270 } else {
1271 if (!IS_STARTED(ar)) {
1272 /* The device is gone... together with the key ;-) */
1273 err = 0;
1274 goto out;
1275 }
1276
1277 if (key->hw_key_idx < 64) {
1278 ar->usedkeys &= ~BIT(key->hw_key_idx);
1279 } else {
1280 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1281 AR9170_ENC_ALG_NONE, 0,
1282 NULL, 0);
1283 if (err)
1284 goto out;
1285
1286 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1287 err = carl9170_upload_key(ar, key->hw_key_idx,
1288 NULL,
1289 AR9170_ENC_ALG_NONE,
1290 1, NULL, 0);
1291 if (err)
1292 goto out;
1293 }
1294
1295 }
1296
1297 err = carl9170_disable_key(ar, key->hw_key_idx);
1298 if (err)
1299 goto out;
1300 }
1301
1302 out:
1303 mutex_unlock(&ar->mutex);
1304 return err;
1305
1306 err_softw:
1307 if (!ar->rx_software_decryption) {
1308 ar->rx_software_decryption = true;
1309 carl9170_set_operating_mode(ar);
1310 }
1311 mutex_unlock(&ar->mutex);
1312 return -ENOSPC;
1313 }
1314
1315 static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1316 struct ieee80211_vif *vif,
1317 struct ieee80211_sta *sta)
1318 {
1319 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1320 unsigned int i;
1321
1322 atomic_set(&sta_info->pending_frames, 0);
1323
1324 if (sta->ht_cap.ht_supported) {
1325 if (sta->ht_cap.ampdu_density > 6) {
1326 /*
1327 * HW does support 16us AMPDU density.
1328 * No HT-Xmit for station.
1329 */
1330
1331 return 0;
1332 }
1333
1334 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++)
1335 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1336
1337 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
1338 sta_info->ht_sta = true;
1339 }
1340
1341 return 0;
1342 }
1343
1344 static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1345 struct ieee80211_vif *vif,
1346 struct ieee80211_sta *sta)
1347 {
1348 struct ar9170 *ar = hw->priv;
1349 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1350 unsigned int i;
1351 bool cleanup = false;
1352
1353 if (sta->ht_cap.ht_supported) {
1354
1355 sta_info->ht_sta = false;
1356
1357 rcu_read_lock();
1358 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) {
1359 struct carl9170_sta_tid *tid_info;
1360
1361 tid_info = rcu_dereference(sta_info->agg[i]);
1362 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1363
1364 if (!tid_info)
1365 continue;
1366
1367 spin_lock_bh(&ar->tx_ampdu_list_lock);
1368 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1369 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1370 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1371 cleanup = true;
1372 }
1373 rcu_read_unlock();
1374
1375 if (cleanup)
1376 carl9170_ampdu_gc(ar);
1377 }
1378
1379 return 0;
1380 }
1381
1382 static int carl9170_op_conf_tx(struct ieee80211_hw *hw,
1383 struct ieee80211_vif *vif, u16 queue,
1384 const struct ieee80211_tx_queue_params *param)
1385 {
1386 struct ar9170 *ar = hw->priv;
1387 int ret;
1388
1389 mutex_lock(&ar->mutex);
1390 memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param));
1391 ret = carl9170_set_qos(ar);
1392 mutex_unlock(&ar->mutex);
1393 return ret;
1394 }
1395
1396 static void carl9170_ampdu_work(struct work_struct *work)
1397 {
1398 struct ar9170 *ar = container_of(work, struct ar9170,
1399 ampdu_work);
1400
1401 if (!IS_STARTED(ar))
1402 return;
1403
1404 mutex_lock(&ar->mutex);
1405 carl9170_ampdu_gc(ar);
1406 mutex_unlock(&ar->mutex);
1407 }
1408
1409 static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1410 struct ieee80211_vif *vif,
1411 struct ieee80211_ampdu_params *params)
1412 {
1413 struct ieee80211_sta *sta = params->sta;
1414 enum ieee80211_ampdu_mlme_action action = params->action;
1415 u16 tid = params->tid;
1416 u16 *ssn = &params->ssn;
1417 struct ar9170 *ar = hw->priv;
1418 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1419 struct carl9170_sta_tid *tid_info;
1420
1421 if (modparam_noht)
1422 return -EOPNOTSUPP;
1423
1424 switch (action) {
1425 case IEEE80211_AMPDU_TX_START:
1426 if (!sta_info->ht_sta)
1427 return -EOPNOTSUPP;
1428
1429 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1430 GFP_ATOMIC);
1431 if (!tid_info)
1432 return -ENOMEM;
1433
1434 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1435 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1436 tid_info->tid = tid;
1437 tid_info->max = sta_info->ampdu_max_len;
1438 tid_info->sta = sta;
1439 tid_info->vif = vif;
1440
1441 INIT_LIST_HEAD(&tid_info->list);
1442 INIT_LIST_HEAD(&tid_info->tmp_list);
1443 skb_queue_head_init(&tid_info->queue);
1444 spin_lock_init(&tid_info->lock);
1445
1446 spin_lock_bh(&ar->tx_ampdu_list_lock);
1447 ar->tx_ampdu_list_len++;
1448 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1449 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1450 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1451
1452 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
1453
1454 case IEEE80211_AMPDU_TX_STOP_CONT:
1455 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1456 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1457 rcu_read_lock();
1458 tid_info = rcu_dereference(sta_info->agg[tid]);
1459 if (tid_info) {
1460 spin_lock_bh(&ar->tx_ampdu_list_lock);
1461 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1462 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1463 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1464 }
1465
1466 RCU_INIT_POINTER(sta_info->agg[tid], NULL);
1467 rcu_read_unlock();
1468
1469 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1470 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1471 break;
1472
1473 case IEEE80211_AMPDU_TX_OPERATIONAL:
1474 rcu_read_lock();
1475 tid_info = rcu_dereference(sta_info->agg[tid]);
1476
1477 sta_info->stats[tid].clear = true;
1478 sta_info->stats[tid].req = false;
1479
1480 if (tid_info) {
1481 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1482 tid_info->state = CARL9170_TID_STATE_IDLE;
1483 }
1484 rcu_read_unlock();
1485
1486 if (WARN_ON_ONCE(!tid_info))
1487 return -EFAULT;
1488
1489 break;
1490
1491 case IEEE80211_AMPDU_RX_START:
1492 case IEEE80211_AMPDU_RX_STOP:
1493 /* Handled by hardware */
1494 break;
1495
1496 default:
1497 return -EOPNOTSUPP;
1498 }
1499
1500 return 0;
1501 }
1502
1503 #ifdef CONFIG_CARL9170_WPC
1504 static int carl9170_register_wps_button(struct ar9170 *ar)
1505 {
1506 struct input_dev *input;
1507 int err;
1508
1509 if (!(ar->features & CARL9170_WPS_BUTTON))
1510 return 0;
1511
1512 input = input_allocate_device();
1513 if (!input)
1514 return -ENOMEM;
1515
1516 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1517 wiphy_name(ar->hw->wiphy));
1518
1519 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1520 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1521
1522 input->name = ar->wps.name;
1523 input->phys = ar->wps.phys;
1524 input->id.bustype = BUS_USB;
1525 input->dev.parent = &ar->hw->wiphy->dev;
1526
1527 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1528
1529 err = input_register_device(input);
1530 if (err) {
1531 input_free_device(input);
1532 return err;
1533 }
1534
1535 ar->wps.pbc = input;
1536 return 0;
1537 }
1538 #endif /* CONFIG_CARL9170_WPC */
1539
1540 #ifdef CONFIG_CARL9170_HWRNG
1541 static int carl9170_rng_get(struct ar9170 *ar)
1542 {
1543
1544 #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
1545 #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
1546
1547 static const __le32 rng_load[RW] = {
1548 [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)};
1549
1550 u32 buf[RW];
1551
1552 unsigned int i, off = 0, transfer, count;
1553 int err;
1554
1555 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
1556
1557 if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized)
1558 return -EAGAIN;
1559
1560 count = ARRAY_SIZE(ar->rng.cache);
1561 while (count) {
1562 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1563 RB, (u8 *) rng_load,
1564 RB, (u8 *) buf);
1565 if (err)
1566 return err;
1567
1568 transfer = min_t(unsigned int, count, RW);
1569 for (i = 0; i < transfer; i++)
1570 ar->rng.cache[off + i] = buf[i];
1571
1572 off += transfer;
1573 count -= transfer;
1574 }
1575
1576 ar->rng.cache_idx = 0;
1577
1578 #undef RW
1579 #undef RB
1580 return 0;
1581 }
1582
1583 static int carl9170_rng_read(struct hwrng *rng, u32 *data)
1584 {
1585 struct ar9170 *ar = (struct ar9170 *)rng->priv;
1586 int ret = -EIO;
1587
1588 mutex_lock(&ar->mutex);
1589 if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) {
1590 ret = carl9170_rng_get(ar);
1591 if (ret) {
1592 mutex_unlock(&ar->mutex);
1593 return ret;
1594 }
1595 }
1596
1597 *data = ar->rng.cache[ar->rng.cache_idx++];
1598 mutex_unlock(&ar->mutex);
1599
1600 return sizeof(u16);
1601 }
1602
1603 static void carl9170_unregister_hwrng(struct ar9170 *ar)
1604 {
1605 if (ar->rng.initialized) {
1606 hwrng_unregister(&ar->rng.rng);
1607 ar->rng.initialized = false;
1608 }
1609 }
1610
1611 static int carl9170_register_hwrng(struct ar9170 *ar)
1612 {
1613 int err;
1614
1615 snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name),
1616 "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy));
1617 ar->rng.rng.name = ar->rng.name;
1618 ar->rng.rng.data_read = carl9170_rng_read;
1619 ar->rng.rng.priv = (unsigned long)ar;
1620
1621 if (WARN_ON(ar->rng.initialized))
1622 return -EALREADY;
1623
1624 err = hwrng_register(&ar->rng.rng);
1625 if (err) {
1626 dev_err(&ar->udev->dev, "Failed to register the random "
1627 "number generator (%d)\n", err);
1628 return err;
1629 }
1630
1631 ar->rng.initialized = true;
1632
1633 err = carl9170_rng_get(ar);
1634 if (err) {
1635 carl9170_unregister_hwrng(ar);
1636 return err;
1637 }
1638
1639 return 0;
1640 }
1641 #endif /* CONFIG_CARL9170_HWRNG */
1642
1643 static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1644 struct survey_info *survey)
1645 {
1646 struct ar9170 *ar = hw->priv;
1647 struct ieee80211_channel *chan;
1648 struct ieee80211_supported_band *band;
1649 int err, b, i;
1650
1651 chan = ar->channel;
1652 if (!chan)
1653 return -ENODEV;
1654
1655 if (idx == chan->hw_value) {
1656 mutex_lock(&ar->mutex);
1657 err = carl9170_update_survey(ar, false, true);
1658 mutex_unlock(&ar->mutex);
1659 if (err)
1660 return err;
1661 }
1662
1663 for (b = 0; b < NUM_NL80211_BANDS; b++) {
1664 band = ar->hw->wiphy->bands[b];
1665
1666 if (!band)
1667 continue;
1668
1669 for (i = 0; i < band->n_channels; i++) {
1670 if (band->channels[i].hw_value == idx) {
1671 chan = &band->channels[i];
1672 goto found;
1673 }
1674 }
1675 }
1676 return -ENOENT;
1677
1678 found:
1679 memcpy(survey, &ar->survey[idx], sizeof(*survey));
1680
1681 survey->channel = chan;
1682 survey->filled = SURVEY_INFO_NOISE_DBM;
1683
1684 if (ar->channel == chan)
1685 survey->filled |= SURVEY_INFO_IN_USE;
1686
1687 if (ar->fw.hw_counters) {
1688 survey->filled |= SURVEY_INFO_TIME |
1689 SURVEY_INFO_TIME_BUSY |
1690 SURVEY_INFO_TIME_TX;
1691 }
1692
1693 return 0;
1694 }
1695
1696 static void carl9170_op_flush(struct ieee80211_hw *hw,
1697 struct ieee80211_vif *vif,
1698 u32 queues, bool drop)
1699 {
1700 struct ar9170 *ar = hw->priv;
1701 unsigned int vid;
1702
1703 mutex_lock(&ar->mutex);
1704 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1705 carl9170_flush_cab(ar, vid);
1706
1707 carl9170_flush(ar, drop);
1708 mutex_unlock(&ar->mutex);
1709 }
1710
1711 static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1712 struct ieee80211_low_level_stats *stats)
1713 {
1714 struct ar9170 *ar = hw->priv;
1715
1716 memset(stats, 0, sizeof(*stats));
1717 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1718 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1719 return 0;
1720 }
1721
1722 static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1723 struct ieee80211_vif *vif,
1724 enum sta_notify_cmd cmd,
1725 struct ieee80211_sta *sta)
1726 {
1727 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1728
1729 switch (cmd) {
1730 case STA_NOTIFY_SLEEP:
1731 sta_info->sleeping = true;
1732 if (atomic_read(&sta_info->pending_frames))
1733 ieee80211_sta_block_awake(hw, sta, true);
1734 break;
1735
1736 case STA_NOTIFY_AWAKE:
1737 sta_info->sleeping = false;
1738 break;
1739 }
1740 }
1741
1742 static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
1743 {
1744 struct ar9170 *ar = hw->priv;
1745
1746 return !!atomic_read(&ar->tx_total_queued);
1747 }
1748
1749 static const struct ieee80211_ops carl9170_ops = {
1750 .start = carl9170_op_start,
1751 .stop = carl9170_op_stop,
1752 .tx = carl9170_op_tx,
1753 .flush = carl9170_op_flush,
1754 .add_interface = carl9170_op_add_interface,
1755 .remove_interface = carl9170_op_remove_interface,
1756 .config = carl9170_op_config,
1757 .prepare_multicast = carl9170_op_prepare_multicast,
1758 .configure_filter = carl9170_op_configure_filter,
1759 .conf_tx = carl9170_op_conf_tx,
1760 .bss_info_changed = carl9170_op_bss_info_changed,
1761 .get_tsf = carl9170_op_get_tsf,
1762 .set_key = carl9170_op_set_key,
1763 .sta_add = carl9170_op_sta_add,
1764 .sta_remove = carl9170_op_sta_remove,
1765 .sta_notify = carl9170_op_sta_notify,
1766 .get_survey = carl9170_op_get_survey,
1767 .get_stats = carl9170_op_get_stats,
1768 .ampdu_action = carl9170_op_ampdu_action,
1769 .tx_frames_pending = carl9170_tx_frames_pending,
1770 };
1771
1772 void *carl9170_alloc(size_t priv_size)
1773 {
1774 struct ieee80211_hw *hw;
1775 struct ar9170 *ar;
1776 struct sk_buff *skb;
1777 int i;
1778
1779 /*
1780 * this buffer is used for rx stream reconstruction.
1781 * Under heavy load this device (or the transport layer?)
1782 * tends to split the streams into separate rx descriptors.
1783 */
1784
1785 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1786 if (!skb)
1787 goto err_nomem;
1788
1789 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1790 if (!hw)
1791 goto err_nomem;
1792
1793 ar = hw->priv;
1794 ar->hw = hw;
1795 ar->rx_failover = skb;
1796
1797 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1798 ar->rx_has_plcp = false;
1799
1800 /*
1801 * Here's a hidden pitfall!
1802 *
1803 * All 4 AC queues work perfectly well under _legacy_ operation.
1804 * However as soon as aggregation is enabled, the traffic flow
1805 * gets very bumpy. Therefore we have to _switch_ to a
1806 * software AC with a single HW queue.
1807 */
1808 hw->queues = __AR9170_NUM_TXQ;
1809
1810 mutex_init(&ar->mutex);
1811 spin_lock_init(&ar->beacon_lock);
1812 spin_lock_init(&ar->cmd_lock);
1813 spin_lock_init(&ar->tx_stats_lock);
1814 spin_lock_init(&ar->tx_ampdu_list_lock);
1815 spin_lock_init(&ar->mem_lock);
1816 spin_lock_init(&ar->state_lock);
1817 atomic_set(&ar->pending_restarts, 0);
1818 ar->vifs = 0;
1819 for (i = 0; i < ar->hw->queues; i++) {
1820 skb_queue_head_init(&ar->tx_status[i]);
1821 skb_queue_head_init(&ar->tx_pending[i]);
1822
1823 INIT_LIST_HEAD(&ar->bar_list[i]);
1824 spin_lock_init(&ar->bar_list_lock[i]);
1825 }
1826 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1827 INIT_WORK(&ar->ping_work, carl9170_ping_work);
1828 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1829 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1830 INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
1831 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1832 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1833 rcu_assign_pointer(ar->tx_ampdu_iter,
1834 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1835
1836 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1837 INIT_LIST_HEAD(&ar->vif_list);
1838 init_completion(&ar->tx_flush);
1839
1840 /* firmware decides which modes we support */
1841 hw->wiphy->interface_modes = 0;
1842
1843 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1844 ieee80211_hw_set(hw, MFP_CAPABLE);
1845 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1846 ieee80211_hw_set(hw, SUPPORTS_PS);
1847 ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
1848 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
1849 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
1850 ieee80211_hw_set(hw, SIGNAL_DBM);
1851 ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
1852
1853 if (!modparam_noht) {
1854 /*
1855 * see the comment above, why we allow the user
1856 * to disable HT by a module parameter.
1857 */
1858 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1859 }
1860
1861 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1862 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1863 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1864
1865 hw->max_rates = CARL9170_TX_MAX_RATES;
1866 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1867
1868 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1869 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1870
1871 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1872
1873 return ar;
1874
1875 err_nomem:
1876 kfree_skb(skb);
1877 return ERR_PTR(-ENOMEM);
1878 }
1879
1880 static int carl9170_read_eeprom(struct ar9170 *ar)
1881 {
1882 #define RW 8 /* number of words to read at once */
1883 #define RB (sizeof(u32) * RW)
1884 u8 *eeprom = (void *)&ar->eeprom;
1885 __le32 offsets[RW];
1886 int i, j, err;
1887
1888 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1889
1890 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1891 #ifndef __CHECKER__
1892 /* don't want to handle trailing remains */
1893 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1894 #endif
1895
1896 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) {
1897 for (j = 0; j < RW; j++)
1898 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1899 RB * i + 4 * j);
1900
1901 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1902 RB, (u8 *) &offsets,
1903 RB, eeprom + RB * i);
1904 if (err)
1905 return err;
1906 }
1907
1908 #undef RW
1909 #undef RB
1910 return 0;
1911 }
1912
1913 static int carl9170_parse_eeprom(struct ar9170 *ar)
1914 {
1915 struct ath_regulatory *regulatory = &ar->common.regulatory;
1916 unsigned int rx_streams, tx_streams, tx_params = 0;
1917 int bands = 0;
1918 int chans = 0;
1919
1920 if (ar->eeprom.length == cpu_to_le16(0xffff))
1921 return -ENODATA;
1922
1923 rx_streams = hweight8(ar->eeprom.rx_mask);
1924 tx_streams = hweight8(ar->eeprom.tx_mask);
1925
1926 if (rx_streams != tx_streams) {
1927 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1928
1929 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1930 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1931
1932 tx_params = (tx_streams - 1) <<
1933 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1934
1935 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1936 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1937 }
1938
1939 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1940 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] =
1941 &carl9170_band_2GHz;
1942 chans += carl9170_band_2GHz.n_channels;
1943 bands++;
1944 }
1945 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1946 ar->hw->wiphy->bands[NL80211_BAND_5GHZ] =
1947 &carl9170_band_5GHz;
1948 chans += carl9170_band_5GHz.n_channels;
1949 bands++;
1950 }
1951
1952 if (!bands)
1953 return -EINVAL;
1954
1955 ar->survey = kcalloc(chans, sizeof(struct survey_info), GFP_KERNEL);
1956 if (!ar->survey)
1957 return -ENOMEM;
1958 ar->num_channels = chans;
1959
1960 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1961
1962 /* second part of wiphy init */
1963 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1964
1965 return 0;
1966 }
1967
1968 static void carl9170_reg_notifier(struct wiphy *wiphy,
1969 struct regulatory_request *request)
1970 {
1971 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1972 struct ar9170 *ar = hw->priv;
1973
1974 ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1975 }
1976
1977 int carl9170_register(struct ar9170 *ar)
1978 {
1979 struct ath_regulatory *regulatory = &ar->common.regulatory;
1980 int err = 0, i;
1981
1982 if (WARN_ON(ar->mem_bitmap))
1983 return -EINVAL;
1984
1985 ar->mem_bitmap = kcalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG),
1986 sizeof(unsigned long),
1987 GFP_KERNEL);
1988
1989 if (!ar->mem_bitmap)
1990 return -ENOMEM;
1991
1992 /* try to read EEPROM, init MAC addr */
1993 err = carl9170_read_eeprom(ar);
1994 if (err)
1995 return err;
1996
1997 err = carl9170_parse_eeprom(ar);
1998 if (err)
1999 return err;
2000
2001 err = ath_regd_init(regulatory, ar->hw->wiphy,
2002 carl9170_reg_notifier);
2003 if (err)
2004 return err;
2005
2006 if (modparam_noht) {
2007 carl9170_band_2GHz.ht_cap.ht_supported = false;
2008 carl9170_band_5GHz.ht_cap.ht_supported = false;
2009 }
2010
2011 for (i = 0; i < ar->fw.vif_num; i++) {
2012 ar->vif_priv[i].id = i;
2013 ar->vif_priv[i].vif = NULL;
2014 }
2015
2016 err = ieee80211_register_hw(ar->hw);
2017 if (err)
2018 return err;
2019
2020 /* mac80211 interface is now registered */
2021 ar->registered = true;
2022
2023 if (!ath_is_world_regd(regulatory))
2024 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
2025
2026 #ifdef CONFIG_CARL9170_DEBUGFS
2027 carl9170_debugfs_register(ar);
2028 #endif /* CONFIG_CARL9170_DEBUGFS */
2029
2030 err = carl9170_led_init(ar);
2031 if (err)
2032 goto err_unreg;
2033
2034 #ifdef CONFIG_CARL9170_LEDS
2035 err = carl9170_led_register(ar);
2036 if (err)
2037 goto err_unreg;
2038 #endif /* CONFIG_CARL9170_LEDS */
2039
2040 #ifdef CONFIG_CARL9170_WPC
2041 err = carl9170_register_wps_button(ar);
2042 if (err)
2043 goto err_unreg;
2044 #endif /* CONFIG_CARL9170_WPC */
2045
2046 #ifdef CONFIG_CARL9170_HWRNG
2047 err = carl9170_register_hwrng(ar);
2048 if (err)
2049 goto err_unreg;
2050 #endif /* CONFIG_CARL9170_HWRNG */
2051
2052 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
2053 wiphy_name(ar->hw->wiphy));
2054
2055 return 0;
2056
2057 err_unreg:
2058 carl9170_unregister(ar);
2059 return err;
2060 }
2061
2062 void carl9170_unregister(struct ar9170 *ar)
2063 {
2064 if (!ar->registered)
2065 return;
2066
2067 ar->registered = false;
2068
2069 #ifdef CONFIG_CARL9170_LEDS
2070 carl9170_led_unregister(ar);
2071 #endif /* CONFIG_CARL9170_LEDS */
2072
2073 #ifdef CONFIG_CARL9170_DEBUGFS
2074 carl9170_debugfs_unregister(ar);
2075 #endif /* CONFIG_CARL9170_DEBUGFS */
2076
2077 #ifdef CONFIG_CARL9170_WPC
2078 if (ar->wps.pbc) {
2079 input_unregister_device(ar->wps.pbc);
2080 ar->wps.pbc = NULL;
2081 }
2082 #endif /* CONFIG_CARL9170_WPC */
2083
2084 #ifdef CONFIG_CARL9170_HWRNG
2085 carl9170_unregister_hwrng(ar);
2086 #endif /* CONFIG_CARL9170_HWRNG */
2087
2088 carl9170_cancel_worker(ar);
2089 cancel_work_sync(&ar->restart_work);
2090
2091 ieee80211_unregister_hw(ar->hw);
2092 }
2093
2094 void carl9170_free(struct ar9170 *ar)
2095 {
2096 WARN_ON(ar->registered);
2097 WARN_ON(IS_INITIALIZED(ar));
2098
2099 kfree_skb(ar->rx_failover);
2100 ar->rx_failover = NULL;
2101
2102 kfree(ar->mem_bitmap);
2103 ar->mem_bitmap = NULL;
2104
2105 kfree(ar->survey);
2106 ar->survey = NULL;
2107
2108 mutex_destroy(&ar->mutex);
2109
2110 ieee80211_free_hw(ar->hw);
2111 }
Linux with added FPC-III support