2 * Atheros CARL9170 driver
4 * mac80211 interaction code
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
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.
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.
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/.
23 * This file incorporates work covered by the following copyright and
25 * Copyright (c) 2007-2008 Atheros Communications, Inc.
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.
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.
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>
51 static bool modparam_nohwcrypt
;
52 module_param_named(nohwcrypt
, modparam_nohwcrypt
, bool, S_IRUGO
);
53 MODULE_PARM_DESC(nohwcrypt
, "Disable hardware crypto offload.");
56 module_param_named(noht
, modparam_noht
, int, S_IRUGO
);
57 MODULE_PARM_DESC(noht
, "Disable MPDU aggregation.");
59 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
60 .bitrate = (_bitrate), \
62 .hw_value = (_hw_rate) | (_txpidx) << 4, \
65 struct ieee80211_rate __carl9170_ratetable
[] = {
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
),
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
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!
90 #define CHAN(_freq, _idx) { \
91 .center_freq = (_freq), \
93 .max_power = 18, /* XXX */ \
96 static struct ieee80211_channel carl9170_2ghz_chantable
[] = {
113 static struct ieee80211_channel carl9170_5ghz_chantable
[] = {
152 #define CARL9170_HT_CAP \
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, \
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, \
169 static struct ieee80211_supported_band carl9170_band_2GHz
= {
170 .channels
= carl9170_2ghz_chantable
,
171 .n_channels
= ARRAY_SIZE(carl9170_2ghz_chantable
),
172 .bitrates
= carl9170_g_ratetable
,
173 .n_bitrates
= carl9170_g_ratetable_size
,
174 .ht_cap
= CARL9170_HT_CAP
,
177 static struct ieee80211_supported_band carl9170_band_5GHz
= {
178 .channels
= carl9170_5ghz_chantable
,
179 .n_channels
= ARRAY_SIZE(carl9170_5ghz_chantable
),
180 .bitrates
= carl9170_a_ratetable
,
181 .n_bitrates
= carl9170_a_ratetable_size
,
182 .ht_cap
= CARL9170_HT_CAP
,
185 static void carl9170_ampdu_gc(struct ar9170
*ar
)
187 struct carl9170_sta_tid
*tid_info
;
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
);
199 spin_unlock_bh(&ar
->tx_ampdu_list_lock
);
202 rcu_assign_pointer(ar
->tx_ampdu_iter
, tid_info
);
207 while (!list_empty(&tid_gc
)) {
209 tid_info
= list_first_entry(&tid_gc
, struct carl9170_sta_tid
,
212 while ((skb
= __skb_dequeue(&tid_info
->queue
)))
213 carl9170_tx_status(ar
, skb
, false);
215 list_del_init(&tid_info
->tmp_list
);
220 static void carl9170_flush(struct ar9170
*ar
, bool drop_queued
)
226 * We can only drop frames which have not been uploaded
230 for (i
= 0; i
< ar
->hw
->queues
; i
++) {
233 while ((skb
= skb_dequeue(&ar
->tx_pending
[i
]))) {
234 struct ieee80211_tx_info
*info
;
236 info
= IEEE80211_SKB_CB(skb
);
237 if (info
->flags
& IEEE80211_TX_CTL_AMPDU
)
238 atomic_dec(&ar
->tx_ampdu_upload
);
240 carl9170_tx_status(ar
, skb
, false);
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);
250 static void carl9170_flush_ba(struct ar9170
*ar
)
252 struct sk_buff_head free
;
253 struct carl9170_sta_tid
*tid_info
;
256 __skb_queue_head_init(&free
);
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
;
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
);
270 spin_unlock_bh(&ar
->tx_ampdu_list_lock
);
273 while ((skb
= __skb_dequeue(&free
)))
274 carl9170_tx_status(ar
, skb
, false);
277 static void carl9170_zap_queues(struct ar9170
*ar
)
279 struct carl9170_vif_info
*cvif
;
282 carl9170_ampdu_gc(ar
);
284 carl9170_flush_ba(ar
);
285 carl9170_flush(ar
, true);
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
])) {
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
);
299 spin_unlock_bh(&ar
->tx_status
[i
].lock
);
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
);
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
;
311 for (i
= 0; i
< DIV_ROUND_UP(ar
->fw
.mem_blocks
, BITS_PER_LONG
); i
++)
312 ar
->mem_bitmap
[i
] = 0;
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
);
319 spin_unlock_bh(&ar
->beacon_lock
);
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
);
330 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
332 queue.aifs = ai_fs; \
333 queue.cw_min = cwmin; \
334 queue.cw_max = cwmax; \
335 queue.txop = _txop; \
338 static int carl9170_op_start(struct ieee80211_hw
*hw
)
340 struct ar9170
*ar
= hw
->priv
;
343 mutex_lock(&ar
->mutex
);
345 carl9170_zap_queues(ar
);
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);
354 ar
->current_factor
= ar
->current_density
= -1;
355 /* "The first key is unique." */
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;
364 for (i
= 0; i
< ar
->hw
->queues
; i
++) {
365 ar
->queue_stop_timeout
[i
] = jiffies
;
366 ar
->max_queue_stop_timeout
[i
] = 0;
369 atomic_set(&ar
->mem_allocs
, 0);
371 err
= carl9170_usb_open(ar
);
375 err
= carl9170_init_mac(ar
);
379 err
= carl9170_set_qos(ar
);
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
);
390 err
= carl9170_write_reg(ar
, AR9170_MAC_REG_DMA_TRIGGER
,
391 AR9170_DMA_TRIGGER_RXQ
);
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
,
402 err
= carl9170_upload_key(ar
, i
, NULL
, AR9170_ENC_ALG_NONE
,
407 if (i
< AR9170_CAM_MAX_USER
) {
408 err
= carl9170_disable_key(ar
, i
);
414 carl9170_set_state_when(ar
, CARL9170_IDLE
, CARL9170_STARTED
);
416 ieee80211_queue_delayed_work(ar
->hw
, &ar
->stat_work
,
417 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK
)));
419 ieee80211_wake_queues(ar
->hw
);
423 mutex_unlock(&ar
->mutex
);
427 static void carl9170_cancel_worker(struct ar9170
*ar
)
429 cancel_delayed_work_sync(&ar
->stat_work
);
430 cancel_delayed_work_sync(&ar
->tx_janitor
);
431 #ifdef CONFIG_CARL9170_LEDS
432 cancel_delayed_work_sync(&ar
->led_work
);
433 #endif /* CONFIG_CARL9170_LEDS */
434 cancel_work_sync(&ar
->ps_work
);
435 cancel_work_sync(&ar
->ping_work
);
436 cancel_work_sync(&ar
->ampdu_work
);
439 static void carl9170_op_stop(struct ieee80211_hw
*hw
)
441 struct ar9170
*ar
= hw
->priv
;
443 carl9170_set_state_when(ar
, CARL9170_STARTED
, CARL9170_IDLE
);
445 ieee80211_stop_queues(ar
->hw
);
447 mutex_lock(&ar
->mutex
);
448 if (IS_ACCEPTING_CMD(ar
)) {
449 RCU_INIT_POINTER(ar
->beacon_iter
, NULL
);
451 carl9170_led_set_state(ar
, 0);
454 carl9170_write_reg(ar
, AR9170_MAC_REG_DMA_TRIGGER
, 0);
455 carl9170_usb_stop(ar
);
458 carl9170_zap_queues(ar
);
459 mutex_unlock(&ar
->mutex
);
461 carl9170_cancel_worker(ar
);
464 static void carl9170_restart_work(struct work_struct
*work
)
466 struct ar9170
*ar
= container_of(work
, struct ar9170
,
471 ar
->filter_state
= 0;
472 carl9170_cancel_worker(ar
);
474 mutex_lock(&ar
->mutex
);
475 if (!ar
->force_usb_reset
) {
476 err
= carl9170_usb_restart(ar
);
477 if (net_ratelimit()) {
479 dev_err(&ar
->udev
->dev
, "Failed to restart device (%d).\n", err
);
481 dev_info(&ar
->udev
->dev
, "device restarted successfully.\n");
484 carl9170_zap_queues(ar
);
485 mutex_unlock(&ar
->mutex
);
487 if (!err
&& !ar
->force_usb_reset
) {
488 ar
->restart_counter
++;
489 atomic_set(&ar
->pending_restarts
, 0);
491 ieee80211_restart_hw(ar
->hw
);
494 * The reset was unsuccessful and the device seems to
495 * be dead. But there's still one option: a low-level
496 * usb subsystem reset...
499 carl9170_usb_reset(ar
);
503 void carl9170_restart(struct ar9170
*ar
, const enum carl9170_restart_reasons r
)
505 carl9170_set_state_when(ar
, CARL9170_STARTED
, CARL9170_IDLE
);
508 * Sometimes, an error can trigger several different reset events.
509 * By ignoring these *surplus* reset events, the device won't be
510 * killed again, right after it has recovered.
512 if (atomic_inc_return(&ar
->pending_restarts
) > 1) {
513 dev_dbg(&ar
->udev
->dev
, "ignoring restart (%d)\n", r
);
517 ieee80211_stop_queues(ar
->hw
);
519 dev_err(&ar
->udev
->dev
, "restart device (%d)\n", r
);
521 if (!WARN_ON(r
== CARL9170_RR_NO_REASON
) ||
522 !WARN_ON(r
>= __CARL9170_RR_LAST
))
528 if (!IS_ACCEPTING_CMD(ar
) || ar
->needs_full_reset
)
529 ar
->force_usb_reset
= true;
531 ieee80211_queue_work(ar
->hw
, &ar
->restart_work
);
534 * At this point, the device instance might have vanished/disabled.
535 * So, don't put any code which access the ar9170 struct
536 * without proper protection.
540 static void carl9170_ping_work(struct work_struct
*work
)
542 struct ar9170
*ar
= container_of(work
, struct ar9170
, ping_work
);
548 mutex_lock(&ar
->mutex
);
549 err
= carl9170_echo_test(ar
, 0xdeadbeef);
551 carl9170_restart(ar
, CARL9170_RR_UNRESPONSIVE_DEVICE
);
552 mutex_unlock(&ar
->mutex
);
555 static int carl9170_init_interface(struct ar9170
*ar
,
556 struct ieee80211_vif
*vif
)
558 struct ath_common
*common
= &ar
->common
;
562 WARN_ON_ONCE(IS_STARTED(ar
));
566 memcpy(common
->macaddr
, vif
->addr
, ETH_ALEN
);
568 if (modparam_nohwcrypt
||
569 ((vif
->type
!= NL80211_IFTYPE_STATION
) &&
570 (vif
->type
!= NL80211_IFTYPE_AP
))) {
571 ar
->rx_software_decryption
= true;
572 ar
->disable_offload
= true;
575 err
= carl9170_set_operating_mode(ar
);
579 static int carl9170_op_add_interface(struct ieee80211_hw
*hw
,
580 struct ieee80211_vif
*vif
)
582 struct carl9170_vif_info
*vif_priv
= (void *) vif
->drv_priv
;
583 struct ieee80211_vif
*main_vif
;
584 struct ar9170
*ar
= hw
->priv
;
585 int vif_id
= -1, err
= 0;
587 mutex_lock(&ar
->mutex
);
589 if (vif_priv
->active
) {
591 * Skip the interface structure initialization,
592 * if the vif survived the _restart call.
594 vif_id
= vif_priv
->id
;
595 vif_priv
->enable_beacon
= false;
597 spin_lock_bh(&ar
->beacon_lock
);
598 dev_kfree_skb_any(vif_priv
->beacon
);
599 vif_priv
->beacon
= NULL
;
600 spin_unlock_bh(&ar
->beacon_lock
);
605 main_vif
= carl9170_get_main_vif(ar
);
608 switch (main_vif
->type
) {
609 case NL80211_IFTYPE_STATION
:
610 if (vif
->type
== NL80211_IFTYPE_STATION
)
618 case NL80211_IFTYPE_MESH_POINT
:
619 case NL80211_IFTYPE_AP
:
620 if ((vif
->type
== NL80211_IFTYPE_STATION
) ||
621 (vif
->type
== NL80211_IFTYPE_WDS
) ||
622 (vif
->type
== NL80211_IFTYPE_AP
) ||
623 (vif
->type
== NL80211_IFTYPE_MESH_POINT
))
636 vif_id
= bitmap_find_free_region(&ar
->vif_bitmap
, ar
->fw
.vif_num
, 0);
645 BUG_ON(ar
->vif_priv
[vif_id
].id
!= vif_id
);
647 vif_priv
->active
= true;
648 vif_priv
->id
= vif_id
;
649 vif_priv
->enable_beacon
= false;
651 list_add_tail_rcu(&vif_priv
->list
, &ar
->vif_list
);
652 rcu_assign_pointer(ar
->vif_priv
[vif_id
].vif
, vif
);
655 if (carl9170_get_main_vif(ar
) == vif
) {
656 rcu_assign_pointer(ar
->beacon_iter
, vif_priv
);
659 err
= carl9170_init_interface(ar
, vif
);
664 err
= carl9170_mod_virtual_mac(ar
, vif_id
, vif
->addr
);
670 if (ar
->fw
.tx_seq_table
) {
671 err
= carl9170_write_reg(ar
, ar
->fw
.tx_seq_table
+ vif_id
* 4,
678 if (err
&& (vif_id
>= 0)) {
679 vif_priv
->active
= false;
680 bitmap_release_region(&ar
->vif_bitmap
, vif_id
, 0);
682 RCU_INIT_POINTER(ar
->vif_priv
[vif_id
].vif
, NULL
);
683 list_del_rcu(&vif_priv
->list
);
684 mutex_unlock(&ar
->mutex
);
688 ar
->ps
.off_override
|= PS_OFF_VIF
;
690 mutex_unlock(&ar
->mutex
);
696 static void carl9170_op_remove_interface(struct ieee80211_hw
*hw
,
697 struct ieee80211_vif
*vif
)
699 struct carl9170_vif_info
*vif_priv
= (void *) vif
->drv_priv
;
700 struct ieee80211_vif
*main_vif
;
701 struct ar9170
*ar
= hw
->priv
;
704 mutex_lock(&ar
->mutex
);
706 if (WARN_ON_ONCE(!vif_priv
->active
))
712 main_vif
= carl9170_get_main_vif(ar
);
716 vif_priv
->active
= false;
717 WARN_ON(vif_priv
->enable_beacon
);
718 vif_priv
->enable_beacon
= false;
719 list_del_rcu(&vif_priv
->list
);
720 RCU_INIT_POINTER(ar
->vif_priv
[id
].vif
, NULL
);
722 if (vif
== main_vif
) {
726 WARN_ON(carl9170_init_interface(ar
,
727 carl9170_get_main_vif(ar
)));
729 carl9170_set_operating_mode(ar
);
734 WARN_ON(carl9170_mod_virtual_mac(ar
, id
, NULL
));
737 carl9170_update_beacon(ar
, false);
738 carl9170_flush_cab(ar
, id
);
740 spin_lock_bh(&ar
->beacon_lock
);
741 dev_kfree_skb_any(vif_priv
->beacon
);
742 vif_priv
->beacon
= NULL
;
743 spin_unlock_bh(&ar
->beacon_lock
);
745 bitmap_release_region(&ar
->vif_bitmap
, id
, 0);
747 carl9170_set_beacon_timers(ar
);
750 ar
->ps
.off_override
&= ~PS_OFF_VIF
;
753 mutex_unlock(&ar
->mutex
);
758 void carl9170_ps_check(struct ar9170
*ar
)
760 ieee80211_queue_work(ar
->hw
, &ar
->ps_work
);
763 /* caller must hold ar->mutex */
764 static int carl9170_ps_update(struct ar9170
*ar
)
769 if (!ar
->ps
.off_override
)
770 ps
= (ar
->hw
->conf
.flags
& IEEE80211_CONF_PS
);
772 if (ps
!= ar
->ps
.state
) {
773 err
= carl9170_powersave(ar
, ps
);
777 if (ar
->ps
.state
&& !ps
) {
778 ar
->ps
.sleep_ms
= jiffies_to_msecs(jiffies
-
783 ar
->ps
.last_slept
= jiffies
;
785 ar
->ps
.last_action
= jiffies
;
792 static void carl9170_ps_work(struct work_struct
*work
)
794 struct ar9170
*ar
= container_of(work
, struct ar9170
,
796 mutex_lock(&ar
->mutex
);
798 WARN_ON_ONCE(carl9170_ps_update(ar
) != 0);
799 mutex_unlock(&ar
->mutex
);
802 static int carl9170_update_survey(struct ar9170
*ar
, bool flush
, bool noise
)
807 err
= carl9170_get_noisefloor(ar
);
812 if (ar
->fw
.hw_counters
) {
813 err
= carl9170_collect_tally(ar
);
819 memset(&ar
->tally
, 0, sizeof(ar
->tally
));
824 static void carl9170_stat_work(struct work_struct
*work
)
826 struct ar9170
*ar
= container_of(work
, struct ar9170
, stat_work
.work
);
829 mutex_lock(&ar
->mutex
);
830 err
= carl9170_update_survey(ar
, false, true);
831 mutex_unlock(&ar
->mutex
);
836 ieee80211_queue_delayed_work(ar
->hw
, &ar
->stat_work
,
837 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK
)));
840 static int carl9170_op_config(struct ieee80211_hw
*hw
, u32 changed
)
842 struct ar9170
*ar
= hw
->priv
;
845 mutex_lock(&ar
->mutex
);
846 if (changed
& IEEE80211_CONF_CHANGE_LISTEN_INTERVAL
) {
851 if (changed
& IEEE80211_CONF_CHANGE_PS
) {
852 err
= carl9170_ps_update(ar
);
857 if (changed
& IEEE80211_CONF_CHANGE_SMPS
) {
862 if (changed
& IEEE80211_CONF_CHANGE_CHANNEL
) {
863 /* adjust slot time for 5 GHz */
864 err
= carl9170_set_slot_time(ar
);
868 err
= carl9170_update_survey(ar
, true, false);
872 err
= carl9170_set_channel(ar
, hw
->conf
.channel
,
873 hw
->conf
.channel_type
, CARL9170_RFI_NONE
);
877 err
= carl9170_update_survey(ar
, false, true);
881 err
= carl9170_set_dyn_sifs_ack(ar
);
885 err
= carl9170_set_rts_cts_rate(ar
);
890 if (changed
& IEEE80211_CONF_CHANGE_POWER
) {
891 err
= carl9170_set_mac_tpc(ar
, ar
->hw
->conf
.channel
);
897 mutex_unlock(&ar
->mutex
);
901 static u64
carl9170_op_prepare_multicast(struct ieee80211_hw
*hw
,
902 struct netdev_hw_addr_list
*mc_list
)
904 struct netdev_hw_addr
*ha
;
907 /* always get broadcast frames */
908 mchash
= 1ULL << (0xff >> 2);
910 netdev_hw_addr_list_for_each(ha
, mc_list
)
911 mchash
|= 1ULL << (ha
->addr
[5] >> 2);
916 static void carl9170_op_configure_filter(struct ieee80211_hw
*hw
,
917 unsigned int changed_flags
,
918 unsigned int *new_flags
,
921 struct ar9170
*ar
= hw
->priv
;
923 /* mask supported flags */
924 *new_flags
&= FIF_ALLMULTI
| ar
->rx_filter_caps
;
926 if (!IS_ACCEPTING_CMD(ar
))
929 mutex_lock(&ar
->mutex
);
931 ar
->filter_state
= *new_flags
;
933 * We can support more by setting the sniffer bit and
934 * then checking the error flags, later.
937 if (*new_flags
& FIF_ALLMULTI
)
940 if (multicast
!= ar
->cur_mc_hash
)
941 WARN_ON(carl9170_update_multicast(ar
, multicast
));
943 if (changed_flags
& (FIF_OTHER_BSS
| FIF_PROMISC_IN_BSS
)) {
944 ar
->sniffer_enabled
= !!(*new_flags
&
945 (FIF_OTHER_BSS
| FIF_PROMISC_IN_BSS
));
947 WARN_ON(carl9170_set_operating_mode(ar
));
950 if (ar
->fw
.rx_filter
&& changed_flags
& ar
->rx_filter_caps
) {
953 if (!ar
->fw
.ba_filter
)
954 rx_filter
|= CARL9170_RX_FILTER_CTL_OTHER
;
956 if (!(*new_flags
& (FIF_FCSFAIL
| FIF_PLCPFAIL
)))
957 rx_filter
|= CARL9170_RX_FILTER_BAD
;
959 if (!(*new_flags
& FIF_CONTROL
))
960 rx_filter
|= CARL9170_RX_FILTER_CTL_OTHER
;
962 if (!(*new_flags
& FIF_PSPOLL
))
963 rx_filter
|= CARL9170_RX_FILTER_CTL_PSPOLL
;
965 if (!(*new_flags
& (FIF_OTHER_BSS
| FIF_PROMISC_IN_BSS
))) {
966 rx_filter
|= CARL9170_RX_FILTER_OTHER_RA
;
967 rx_filter
|= CARL9170_RX_FILTER_DECRY_FAIL
;
970 WARN_ON(carl9170_rx_filter(ar
, rx_filter
));
973 mutex_unlock(&ar
->mutex
);
977 static void carl9170_op_bss_info_changed(struct ieee80211_hw
*hw
,
978 struct ieee80211_vif
*vif
,
979 struct ieee80211_bss_conf
*bss_conf
,
982 struct ar9170
*ar
= hw
->priv
;
983 struct ath_common
*common
= &ar
->common
;
985 struct carl9170_vif_info
*vif_priv
;
986 struct ieee80211_vif
*main_vif
;
988 mutex_lock(&ar
->mutex
);
989 vif_priv
= (void *) vif
->drv_priv
;
990 main_vif
= carl9170_get_main_vif(ar
);
991 if (WARN_ON(!main_vif
))
994 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
995 struct carl9170_vif_info
*iter
;
998 vif_priv
->enable_beacon
= bss_conf
->enable_beacon
;
1000 list_for_each_entry_rcu(iter
, &ar
->vif_list
, list
) {
1001 if (iter
->active
&& iter
->enable_beacon
)
1007 ar
->beacon_enabled
= i
;
1010 if (changed
& BSS_CHANGED_BEACON
) {
1011 err
= carl9170_update_beacon(ar
, false);
1016 if (changed
& (BSS_CHANGED_BEACON_ENABLED
| BSS_CHANGED_BEACON
|
1017 BSS_CHANGED_BEACON_INT
)) {
1019 if (main_vif
!= vif
) {
1020 bss_conf
->beacon_int
= main_vif
->bss_conf
.beacon_int
;
1021 bss_conf
->dtim_period
= main_vif
->bss_conf
.dtim_period
;
1025 * Therefore a hard limit for the broadcast traffic should
1026 * prevent false alarms.
1028 if (vif
->type
!= NL80211_IFTYPE_STATION
&&
1029 (bss_conf
->beacon_int
* bss_conf
->dtim_period
>=
1030 (CARL9170_QUEUE_STUCK_TIMEOUT
/ 2))) {
1035 err
= carl9170_set_beacon_timers(ar
);
1040 if (changed
& BSS_CHANGED_HT
) {
1047 if (main_vif
!= vif
)
1051 * The following settings can only be changed by the
1055 if (changed
& BSS_CHANGED_BSSID
) {
1056 memcpy(common
->curbssid
, bss_conf
->bssid
, ETH_ALEN
);
1057 err
= carl9170_set_operating_mode(ar
);
1062 if (changed
& BSS_CHANGED_ASSOC
) {
1063 ar
->common
.curaid
= bss_conf
->aid
;
1064 err
= carl9170_set_beacon_timers(ar
);
1069 if (changed
& BSS_CHANGED_ERP_SLOT
) {
1070 err
= carl9170_set_slot_time(ar
);
1075 if (changed
& BSS_CHANGED_BASIC_RATES
) {
1076 err
= carl9170_set_mac_rates(ar
);
1082 WARN_ON_ONCE(err
&& IS_STARTED(ar
));
1083 mutex_unlock(&ar
->mutex
);
1086 static u64
carl9170_op_get_tsf(struct ieee80211_hw
*hw
,
1087 struct ieee80211_vif
*vif
)
1089 struct ar9170
*ar
= hw
->priv
;
1090 struct carl9170_tsf_rsp tsf
;
1093 mutex_lock(&ar
->mutex
);
1094 err
= carl9170_exec_cmd(ar
, CARL9170_CMD_READ_TSF
,
1095 0, NULL
, sizeof(tsf
), &tsf
);
1096 mutex_unlock(&ar
->mutex
);
1100 return le64_to_cpu(tsf
.tsf_64
);
1103 static int carl9170_op_set_key(struct ieee80211_hw
*hw
, enum set_key_cmd cmd
,
1104 struct ieee80211_vif
*vif
,
1105 struct ieee80211_sta
*sta
,
1106 struct ieee80211_key_conf
*key
)
1108 struct ar9170
*ar
= hw
->priv
;
1112 if (ar
->disable_offload
|| !vif
)
1116 * We have to fall back to software encryption, whenever
1117 * the user choose to participates in an IBSS or is connected
1118 * to more than one network.
1120 * This is very unfortunate, because some machines cannot handle
1121 * the high througput speed in 802.11n networks.
1124 if (!is_main_vif(ar
, vif
)) {
1125 mutex_lock(&ar
->mutex
);
1130 * While the hardware supports *catch-all* key, for offloading
1131 * group-key en-/de-cryption. The way of how the hardware
1132 * decides which keyId maps to which key, remains a mystery...
1134 if ((vif
->type
!= NL80211_IFTYPE_STATION
&&
1135 vif
->type
!= NL80211_IFTYPE_ADHOC
) &&
1136 !(key
->flags
& IEEE80211_KEY_FLAG_PAIRWISE
))
1139 switch (key
->cipher
) {
1140 case WLAN_CIPHER_SUITE_WEP40
:
1141 ktype
= AR9170_ENC_ALG_WEP64
;
1143 case WLAN_CIPHER_SUITE_WEP104
:
1144 ktype
= AR9170_ENC_ALG_WEP128
;
1146 case WLAN_CIPHER_SUITE_TKIP
:
1147 ktype
= AR9170_ENC_ALG_TKIP
;
1149 case WLAN_CIPHER_SUITE_CCMP
:
1150 ktype
= AR9170_ENC_ALG_AESCCMP
;
1151 key
->flags
|= IEEE80211_KEY_FLAG_SW_MGMT_TX
;
1157 mutex_lock(&ar
->mutex
);
1158 if (cmd
== SET_KEY
) {
1159 if (!IS_STARTED(ar
)) {
1164 if (!(key
->flags
& IEEE80211_KEY_FLAG_PAIRWISE
)) {
1167 i
= 64 + key
->keyidx
;
1169 for (i
= 0; i
< 64; i
++)
1170 if (!(ar
->usedkeys
& BIT(i
)))
1176 key
->hw_key_idx
= i
;
1178 err
= carl9170_upload_key(ar
, i
, sta
? sta
->addr
: NULL
,
1180 min_t(u8
, 16, key
->keylen
));
1184 if (key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
1185 err
= carl9170_upload_key(ar
, i
, sta
? sta
->addr
:
1192 * hardware is not capable generating MMIC
1193 * of fragmented frames!
1195 key
->flags
|= IEEE80211_KEY_FLAG_GENERATE_MMIC
;
1199 ar
->usedkeys
|= BIT(i
);
1201 key
->flags
|= IEEE80211_KEY_FLAG_GENERATE_IV
;
1203 if (!IS_STARTED(ar
)) {
1204 /* The device is gone... together with the key ;-) */
1209 if (key
->hw_key_idx
< 64) {
1210 ar
->usedkeys
&= ~BIT(key
->hw_key_idx
);
1212 err
= carl9170_upload_key(ar
, key
->hw_key_idx
, NULL
,
1213 AR9170_ENC_ALG_NONE
, 0,
1218 if (key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
1219 err
= carl9170_upload_key(ar
, key
->hw_key_idx
,
1221 AR9170_ENC_ALG_NONE
,
1229 err
= carl9170_disable_key(ar
, key
->hw_key_idx
);
1235 mutex_unlock(&ar
->mutex
);
1239 if (!ar
->rx_software_decryption
) {
1240 ar
->rx_software_decryption
= true;
1241 carl9170_set_operating_mode(ar
);
1243 mutex_unlock(&ar
->mutex
);
1247 static int carl9170_op_sta_add(struct ieee80211_hw
*hw
,
1248 struct ieee80211_vif
*vif
,
1249 struct ieee80211_sta
*sta
)
1251 struct carl9170_sta_info
*sta_info
= (void *) sta
->drv_priv
;
1254 atomic_set(&sta_info
->pending_frames
, 0);
1256 if (sta
->ht_cap
.ht_supported
) {
1257 if (sta
->ht_cap
.ampdu_density
> 6) {
1259 * HW does support 16us AMPDU density.
1260 * No HT-Xmit for station.
1266 for (i
= 0; i
< CARL9170_NUM_TID
; i
++)
1267 RCU_INIT_POINTER(sta_info
->agg
[i
], NULL
);
1269 sta_info
->ampdu_max_len
= 1 << (3 + sta
->ht_cap
.ampdu_factor
);
1270 sta_info
->ht_sta
= true;
1276 static int carl9170_op_sta_remove(struct ieee80211_hw
*hw
,
1277 struct ieee80211_vif
*vif
,
1278 struct ieee80211_sta
*sta
)
1280 struct ar9170
*ar
= hw
->priv
;
1281 struct carl9170_sta_info
*sta_info
= (void *) sta
->drv_priv
;
1283 bool cleanup
= false;
1285 if (sta
->ht_cap
.ht_supported
) {
1287 sta_info
->ht_sta
= false;
1290 for (i
= 0; i
< CARL9170_NUM_TID
; i
++) {
1291 struct carl9170_sta_tid
*tid_info
;
1293 tid_info
= rcu_dereference(sta_info
->agg
[i
]);
1294 RCU_INIT_POINTER(sta_info
->agg
[i
], NULL
);
1299 spin_lock_bh(&ar
->tx_ampdu_list_lock
);
1300 if (tid_info
->state
> CARL9170_TID_STATE_SHUTDOWN
)
1301 tid_info
->state
= CARL9170_TID_STATE_SHUTDOWN
;
1302 spin_unlock_bh(&ar
->tx_ampdu_list_lock
);
1308 carl9170_ampdu_gc(ar
);
1314 static int carl9170_op_conf_tx(struct ieee80211_hw
*hw
,
1315 struct ieee80211_vif
*vif
, u16 queue
,
1316 const struct ieee80211_tx_queue_params
*param
)
1318 struct ar9170
*ar
= hw
->priv
;
1321 mutex_lock(&ar
->mutex
);
1322 if (queue
< ar
->hw
->queues
) {
1323 memcpy(&ar
->edcf
[ar9170_qmap
[queue
]], param
, sizeof(*param
));
1324 ret
= carl9170_set_qos(ar
);
1329 mutex_unlock(&ar
->mutex
);
1333 static void carl9170_ampdu_work(struct work_struct
*work
)
1335 struct ar9170
*ar
= container_of(work
, struct ar9170
,
1338 if (!IS_STARTED(ar
))
1341 mutex_lock(&ar
->mutex
);
1342 carl9170_ampdu_gc(ar
);
1343 mutex_unlock(&ar
->mutex
);
1346 static int carl9170_op_ampdu_action(struct ieee80211_hw
*hw
,
1347 struct ieee80211_vif
*vif
,
1348 enum ieee80211_ampdu_mlme_action action
,
1349 struct ieee80211_sta
*sta
,
1350 u16 tid
, u16
*ssn
, u8 buf_size
)
1352 struct ar9170
*ar
= hw
->priv
;
1353 struct carl9170_sta_info
*sta_info
= (void *) sta
->drv_priv
;
1354 struct carl9170_sta_tid
*tid_info
;
1360 case IEEE80211_AMPDU_TX_START
:
1361 if (!sta_info
->ht_sta
)
1365 if (rcu_dereference(sta_info
->agg
[tid
])) {
1370 tid_info
= kzalloc(sizeof(struct carl9170_sta_tid
),
1377 tid_info
->hsn
= tid_info
->bsn
= tid_info
->snx
= (*ssn
);
1378 tid_info
->state
= CARL9170_TID_STATE_PROGRESS
;
1379 tid_info
->tid
= tid
;
1380 tid_info
->max
= sta_info
->ampdu_max_len
;
1382 INIT_LIST_HEAD(&tid_info
->list
);
1383 INIT_LIST_HEAD(&tid_info
->tmp_list
);
1384 skb_queue_head_init(&tid_info
->queue
);
1385 spin_lock_init(&tid_info
->lock
);
1387 spin_lock_bh(&ar
->tx_ampdu_list_lock
);
1388 ar
->tx_ampdu_list_len
++;
1389 list_add_tail_rcu(&tid_info
->list
, &ar
->tx_ampdu_list
);
1390 rcu_assign_pointer(sta_info
->agg
[tid
], tid_info
);
1391 spin_unlock_bh(&ar
->tx_ampdu_list_lock
);
1394 ieee80211_start_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1397 case IEEE80211_AMPDU_TX_STOP
:
1399 tid_info
= rcu_dereference(sta_info
->agg
[tid
]);
1401 spin_lock_bh(&ar
->tx_ampdu_list_lock
);
1402 if (tid_info
->state
> CARL9170_TID_STATE_SHUTDOWN
)
1403 tid_info
->state
= CARL9170_TID_STATE_SHUTDOWN
;
1404 spin_unlock_bh(&ar
->tx_ampdu_list_lock
);
1407 RCU_INIT_POINTER(sta_info
->agg
[tid
], NULL
);
1410 ieee80211_stop_tx_ba_cb_irqsafe(vif
, sta
->addr
, tid
);
1411 ieee80211_queue_work(ar
->hw
, &ar
->ampdu_work
);
1414 case IEEE80211_AMPDU_TX_OPERATIONAL
:
1416 tid_info
= rcu_dereference(sta_info
->agg
[tid
]);
1418 sta_info
->stats
[tid
].clear
= true;
1419 sta_info
->stats
[tid
].req
= false;
1422 bitmap_zero(tid_info
->bitmap
, CARL9170_BAW_SIZE
);
1423 tid_info
->state
= CARL9170_TID_STATE_IDLE
;
1427 if (WARN_ON_ONCE(!tid_info
))
1432 case IEEE80211_AMPDU_RX_START
:
1433 case IEEE80211_AMPDU_RX_STOP
:
1434 /* Handled by hardware */
1444 #ifdef CONFIG_CARL9170_WPC
1445 static int carl9170_register_wps_button(struct ar9170
*ar
)
1447 struct input_dev
*input
;
1450 if (!(ar
->features
& CARL9170_WPS_BUTTON
))
1453 input
= input_allocate_device();
1457 snprintf(ar
->wps
.name
, sizeof(ar
->wps
.name
), "%s WPS Button",
1458 wiphy_name(ar
->hw
->wiphy
));
1460 snprintf(ar
->wps
.phys
, sizeof(ar
->wps
.phys
),
1461 "ieee80211/%s/input0", wiphy_name(ar
->hw
->wiphy
));
1463 input
->name
= ar
->wps
.name
;
1464 input
->phys
= ar
->wps
.phys
;
1465 input
->id
.bustype
= BUS_USB
;
1466 input
->dev
.parent
= &ar
->hw
->wiphy
->dev
;
1468 input_set_capability(input
, EV_KEY
, KEY_WPS_BUTTON
);
1470 err
= input_register_device(input
);
1472 input_free_device(input
);
1476 ar
->wps
.pbc
= input
;
1479 #endif /* CONFIG_CARL9170_WPC */
1481 #ifdef CONFIG_CARL9170_HWRNG
1482 static int carl9170_rng_get(struct ar9170
*ar
)
1485 #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
1486 #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
1488 static const __le32 rng_load
[RW
] = {
1489 [0 ... (RW
- 1)] = cpu_to_le32(AR9170_RAND_REG_NUM
)};
1493 unsigned int i
, off
= 0, transfer
, count
;
1496 BUILD_BUG_ON(RB
> CARL9170_MAX_CMD_PAYLOAD_LEN
);
1498 if (!IS_ACCEPTING_CMD(ar
) || !ar
->rng
.initialized
)
1501 count
= ARRAY_SIZE(ar
->rng
.cache
);
1503 err
= carl9170_exec_cmd(ar
, CARL9170_CMD_RREG
,
1504 RB
, (u8
*) rng_load
,
1509 transfer
= min_t(unsigned int, count
, RW
);
1510 for (i
= 0; i
< transfer
; i
++)
1511 ar
->rng
.cache
[off
+ i
] = buf
[i
];
1517 ar
->rng
.cache_idx
= 0;
1524 static int carl9170_rng_read(struct hwrng
*rng
, u32
*data
)
1526 struct ar9170
*ar
= (struct ar9170
*)rng
->priv
;
1529 mutex_lock(&ar
->mutex
);
1530 if (ar
->rng
.cache_idx
>= ARRAY_SIZE(ar
->rng
.cache
)) {
1531 ret
= carl9170_rng_get(ar
);
1533 mutex_unlock(&ar
->mutex
);
1538 *data
= ar
->rng
.cache
[ar
->rng
.cache_idx
++];
1539 mutex_unlock(&ar
->mutex
);
1544 static void carl9170_unregister_hwrng(struct ar9170
*ar
)
1546 if (ar
->rng
.initialized
) {
1547 hwrng_unregister(&ar
->rng
.rng
);
1548 ar
->rng
.initialized
= false;
1552 static int carl9170_register_hwrng(struct ar9170
*ar
)
1556 snprintf(ar
->rng
.name
, ARRAY_SIZE(ar
->rng
.name
),
1557 "%s_%s", KBUILD_MODNAME
, wiphy_name(ar
->hw
->wiphy
));
1558 ar
->rng
.rng
.name
= ar
->rng
.name
;
1559 ar
->rng
.rng
.data_read
= carl9170_rng_read
;
1560 ar
->rng
.rng
.priv
= (unsigned long)ar
;
1562 if (WARN_ON(ar
->rng
.initialized
))
1565 err
= hwrng_register(&ar
->rng
.rng
);
1567 dev_err(&ar
->udev
->dev
, "Failed to register the random "
1568 "number generator (%d)\n", err
);
1572 ar
->rng
.initialized
= true;
1574 err
= carl9170_rng_get(ar
);
1576 carl9170_unregister_hwrng(ar
);
1582 #endif /* CONFIG_CARL9170_HWRNG */
1584 static int carl9170_op_get_survey(struct ieee80211_hw
*hw
, int idx
,
1585 struct survey_info
*survey
)
1587 struct ar9170
*ar
= hw
->priv
;
1588 struct ieee80211_channel
*chan
;
1589 struct ieee80211_supported_band
*band
;
1596 if (idx
== chan
->hw_value
) {
1597 mutex_lock(&ar
->mutex
);
1598 err
= carl9170_update_survey(ar
, false, true);
1599 mutex_unlock(&ar
->mutex
);
1604 for (b
= 0; b
< IEEE80211_NUM_BANDS
; b
++) {
1605 band
= ar
->hw
->wiphy
->bands
[b
];
1610 for (i
= 0; i
< band
->n_channels
; i
++) {
1611 if (band
->channels
[i
].hw_value
== idx
) {
1612 chan
= &band
->channels
[i
];
1620 memcpy(survey
, &ar
->survey
[idx
], sizeof(*survey
));
1622 survey
->channel
= chan
;
1623 survey
->filled
= SURVEY_INFO_NOISE_DBM
;
1625 if (ar
->channel
== chan
)
1626 survey
->filled
|= SURVEY_INFO_IN_USE
;
1628 if (ar
->fw
.hw_counters
) {
1629 survey
->filled
|= SURVEY_INFO_CHANNEL_TIME
|
1630 SURVEY_INFO_CHANNEL_TIME_BUSY
|
1631 SURVEY_INFO_CHANNEL_TIME_TX
;
1637 static void carl9170_op_flush(struct ieee80211_hw
*hw
, bool drop
)
1639 struct ar9170
*ar
= hw
->priv
;
1642 mutex_lock(&ar
->mutex
);
1643 for_each_set_bit(vid
, &ar
->vif_bitmap
, ar
->fw
.vif_num
)
1644 carl9170_flush_cab(ar
, vid
);
1646 carl9170_flush(ar
, drop
);
1647 mutex_unlock(&ar
->mutex
);
1650 static int carl9170_op_get_stats(struct ieee80211_hw
*hw
,
1651 struct ieee80211_low_level_stats
*stats
)
1653 struct ar9170
*ar
= hw
->priv
;
1655 memset(stats
, 0, sizeof(*stats
));
1656 stats
->dot11ACKFailureCount
= ar
->tx_ack_failures
;
1657 stats
->dot11FCSErrorCount
= ar
->tx_fcs_errors
;
1661 static void carl9170_op_sta_notify(struct ieee80211_hw
*hw
,
1662 struct ieee80211_vif
*vif
,
1663 enum sta_notify_cmd cmd
,
1664 struct ieee80211_sta
*sta
)
1666 struct carl9170_sta_info
*sta_info
= (void *) sta
->drv_priv
;
1669 case STA_NOTIFY_SLEEP
:
1670 sta_info
->sleeping
= true;
1671 if (atomic_read(&sta_info
->pending_frames
))
1672 ieee80211_sta_block_awake(hw
, sta
, true);
1675 case STA_NOTIFY_AWAKE
:
1676 sta_info
->sleeping
= false;
1681 static bool carl9170_tx_frames_pending(struct ieee80211_hw
*hw
)
1683 struct ar9170
*ar
= hw
->priv
;
1685 return !!atomic_read(&ar
->tx_total_queued
);
1688 static const struct ieee80211_ops carl9170_ops
= {
1689 .start
= carl9170_op_start
,
1690 .stop
= carl9170_op_stop
,
1691 .tx
= carl9170_op_tx
,
1692 .flush
= carl9170_op_flush
,
1693 .add_interface
= carl9170_op_add_interface
,
1694 .remove_interface
= carl9170_op_remove_interface
,
1695 .config
= carl9170_op_config
,
1696 .prepare_multicast
= carl9170_op_prepare_multicast
,
1697 .configure_filter
= carl9170_op_configure_filter
,
1698 .conf_tx
= carl9170_op_conf_tx
,
1699 .bss_info_changed
= carl9170_op_bss_info_changed
,
1700 .get_tsf
= carl9170_op_get_tsf
,
1701 .set_key
= carl9170_op_set_key
,
1702 .sta_add
= carl9170_op_sta_add
,
1703 .sta_remove
= carl9170_op_sta_remove
,
1704 .sta_notify
= carl9170_op_sta_notify
,
1705 .get_survey
= carl9170_op_get_survey
,
1706 .get_stats
= carl9170_op_get_stats
,
1707 .ampdu_action
= carl9170_op_ampdu_action
,
1708 .tx_frames_pending
= carl9170_tx_frames_pending
,
1711 void *carl9170_alloc(size_t priv_size
)
1713 struct ieee80211_hw
*hw
;
1715 struct sk_buff
*skb
;
1719 * this buffer is used for rx stream reconstruction.
1720 * Under heavy load this device (or the transport layer?)
1721 * tends to split the streams into separate rx descriptors.
1724 skb
= __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE
, GFP_KERNEL
);
1728 hw
= ieee80211_alloc_hw(priv_size
, &carl9170_ops
);
1734 ar
->rx_failover
= skb
;
1736 memset(&ar
->rx_plcp
, 0, sizeof(struct ar9170_rx_head
));
1737 ar
->rx_has_plcp
= false;
1740 * Here's a hidden pitfall!
1742 * All 4 AC queues work perfectly well under _legacy_ operation.
1743 * However as soon as aggregation is enabled, the traffic flow
1744 * gets very bumpy. Therefore we have to _switch_ to a
1745 * software AC with a single HW queue.
1747 hw
->queues
= __AR9170_NUM_TXQ
;
1749 mutex_init(&ar
->mutex
);
1750 spin_lock_init(&ar
->beacon_lock
);
1751 spin_lock_init(&ar
->cmd_lock
);
1752 spin_lock_init(&ar
->tx_stats_lock
);
1753 spin_lock_init(&ar
->tx_ampdu_list_lock
);
1754 spin_lock_init(&ar
->mem_lock
);
1755 spin_lock_init(&ar
->state_lock
);
1756 atomic_set(&ar
->pending_restarts
, 0);
1758 for (i
= 0; i
< ar
->hw
->queues
; i
++) {
1759 skb_queue_head_init(&ar
->tx_status
[i
]);
1760 skb_queue_head_init(&ar
->tx_pending
[i
]);
1762 INIT_LIST_HEAD(&ar
->bar_list
[i
]);
1763 spin_lock_init(&ar
->bar_list_lock
[i
]);
1765 INIT_WORK(&ar
->ps_work
, carl9170_ps_work
);
1766 INIT_WORK(&ar
->ping_work
, carl9170_ping_work
);
1767 INIT_WORK(&ar
->restart_work
, carl9170_restart_work
);
1768 INIT_WORK(&ar
->ampdu_work
, carl9170_ampdu_work
);
1769 INIT_DELAYED_WORK(&ar
->stat_work
, carl9170_stat_work
);
1770 INIT_DELAYED_WORK(&ar
->tx_janitor
, carl9170_tx_janitor
);
1771 INIT_LIST_HEAD(&ar
->tx_ampdu_list
);
1772 rcu_assign_pointer(ar
->tx_ampdu_iter
,
1773 (struct carl9170_sta_tid
*) &ar
->tx_ampdu_list
);
1775 bitmap_zero(&ar
->vif_bitmap
, ar
->fw
.vif_num
);
1776 INIT_LIST_HEAD(&ar
->vif_list
);
1777 init_completion(&ar
->tx_flush
);
1779 /* firmware decides which modes we support */
1780 hw
->wiphy
->interface_modes
= 0;
1782 hw
->flags
|= IEEE80211_HW_RX_INCLUDES_FCS
|
1783 IEEE80211_HW_MFP_CAPABLE
|
1784 IEEE80211_HW_REPORTS_TX_ACK_STATUS
|
1785 IEEE80211_HW_SUPPORTS_PS
|
1786 IEEE80211_HW_PS_NULLFUNC_STACK
|
1787 IEEE80211_HW_NEED_DTIM_PERIOD
|
1788 IEEE80211_HW_SIGNAL_DBM
;
1790 if (!modparam_noht
) {
1792 * see the comment above, why we allow the user
1793 * to disable HT by a module parameter.
1795 hw
->flags
|= IEEE80211_HW_AMPDU_AGGREGATION
;
1798 hw
->extra_tx_headroom
= sizeof(struct _carl9170_tx_superframe
);
1799 hw
->sta_data_size
= sizeof(struct carl9170_sta_info
);
1800 hw
->vif_data_size
= sizeof(struct carl9170_vif_info
);
1802 hw
->max_rates
= CARL9170_TX_MAX_RATES
;
1803 hw
->max_rate_tries
= CARL9170_TX_USER_RATE_TRIES
;
1805 for (i
= 0; i
< ARRAY_SIZE(ar
->noise
); i
++)
1806 ar
->noise
[i
] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1808 hw
->wiphy
->flags
&= ~WIPHY_FLAG_PS_ON_BY_DEFAULT
;
1810 /* As IBSS Encryption is software-based, IBSS RSN is supported. */
1811 hw
->wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
1816 return ERR_PTR(-ENOMEM
);
1819 static int carl9170_read_eeprom(struct ar9170
*ar
)
1821 #define RW 8 /* number of words to read at once */
1822 #define RB (sizeof(u32) * RW)
1823 u8
*eeprom
= (void *)&ar
->eeprom
;
1827 BUILD_BUG_ON(sizeof(ar
->eeprom
) & 3);
1829 BUILD_BUG_ON(RB
> CARL9170_MAX_CMD_LEN
- 4);
1831 /* don't want to handle trailing remains */
1832 BUILD_BUG_ON(sizeof(ar
->eeprom
) % RB
);
1835 for (i
= 0; i
< sizeof(ar
->eeprom
) / RB
; i
++) {
1836 for (j
= 0; j
< RW
; j
++)
1837 offsets
[j
] = cpu_to_le32(AR9170_EEPROM_START
+
1840 err
= carl9170_exec_cmd(ar
, CARL9170_CMD_RREG
,
1841 RB
, (u8
*) &offsets
,
1842 RB
, eeprom
+ RB
* i
);
1852 static int carl9170_parse_eeprom(struct ar9170
*ar
)
1854 struct ath_regulatory
*regulatory
= &ar
->common
.regulatory
;
1855 unsigned int rx_streams
, tx_streams
, tx_params
= 0;
1859 if (ar
->eeprom
.length
== cpu_to_le16(0xffff))
1862 rx_streams
= hweight8(ar
->eeprom
.rx_mask
);
1863 tx_streams
= hweight8(ar
->eeprom
.tx_mask
);
1865 if (rx_streams
!= tx_streams
) {
1866 tx_params
= IEEE80211_HT_MCS_TX_RX_DIFF
;
1868 WARN_ON(!(tx_streams
>= 1 && tx_streams
<=
1869 IEEE80211_HT_MCS_TX_MAX_STREAMS
));
1871 tx_params
= (tx_streams
- 1) <<
1872 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT
;
1874 carl9170_band_2GHz
.ht_cap
.mcs
.tx_params
|= tx_params
;
1875 carl9170_band_5GHz
.ht_cap
.mcs
.tx_params
|= tx_params
;
1878 if (ar
->eeprom
.operating_flags
& AR9170_OPFLAG_2GHZ
) {
1879 ar
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
1880 &carl9170_band_2GHz
;
1881 chans
+= carl9170_band_2GHz
.n_channels
;
1884 if (ar
->eeprom
.operating_flags
& AR9170_OPFLAG_5GHZ
) {
1885 ar
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
1886 &carl9170_band_5GHz
;
1887 chans
+= carl9170_band_5GHz
.n_channels
;
1894 ar
->survey
= kzalloc(sizeof(struct survey_info
) * chans
, GFP_KERNEL
);
1897 ar
->num_channels
= chans
;
1900 * I measured this, a bandswitch takes roughly
1901 * 135 ms and a frequency switch about 80.
1903 * FIXME: measure these values again once EEPROM settings
1904 * are used, that will influence them!
1907 ar
->hw
->channel_change_time
= 135 * 1000;
1909 ar
->hw
->channel_change_time
= 80 * 1000;
1911 regulatory
->current_rd
= le16_to_cpu(ar
->eeprom
.reg_domain
[0]);
1913 /* second part of wiphy init */
1914 SET_IEEE80211_PERM_ADDR(ar
->hw
, ar
->eeprom
.mac_address
);
1919 static int carl9170_reg_notifier(struct wiphy
*wiphy
,
1920 struct regulatory_request
*request
)
1922 struct ieee80211_hw
*hw
= wiphy_to_ieee80211_hw(wiphy
);
1923 struct ar9170
*ar
= hw
->priv
;
1925 return ath_reg_notifier_apply(wiphy
, request
, &ar
->common
.regulatory
);
1928 int carl9170_register(struct ar9170
*ar
)
1930 struct ath_regulatory
*regulatory
= &ar
->common
.regulatory
;
1933 if (WARN_ON(ar
->mem_bitmap
))
1936 ar
->mem_bitmap
= kzalloc(roundup(ar
->fw
.mem_blocks
, BITS_PER_LONG
) *
1937 sizeof(unsigned long), GFP_KERNEL
);
1939 if (!ar
->mem_bitmap
)
1942 /* try to read EEPROM, init MAC addr */
1943 err
= carl9170_read_eeprom(ar
);
1947 err
= carl9170_parse_eeprom(ar
);
1951 err
= ath_regd_init(regulatory
, ar
->hw
->wiphy
,
1952 carl9170_reg_notifier
);
1956 if (modparam_noht
) {
1957 carl9170_band_2GHz
.ht_cap
.ht_supported
= false;
1958 carl9170_band_5GHz
.ht_cap
.ht_supported
= false;
1961 for (i
= 0; i
< ar
->fw
.vif_num
; i
++) {
1962 ar
->vif_priv
[i
].id
= i
;
1963 ar
->vif_priv
[i
].vif
= NULL
;
1966 err
= ieee80211_register_hw(ar
->hw
);
1970 /* mac80211 interface is now registered */
1971 ar
->registered
= true;
1973 if (!ath_is_world_regd(regulatory
))
1974 regulatory_hint(ar
->hw
->wiphy
, regulatory
->alpha2
);
1976 #ifdef CONFIG_CARL9170_DEBUGFS
1977 carl9170_debugfs_register(ar
);
1978 #endif /* CONFIG_CARL9170_DEBUGFS */
1980 err
= carl9170_led_init(ar
);
1984 #ifdef CONFIG_CARL9170_LEDS
1985 err
= carl9170_led_register(ar
);
1988 #endif /* CONFIG_CARL9170_LEDS */
1990 #ifdef CONFIG_CARL9170_WPC
1991 err
= carl9170_register_wps_button(ar
);
1994 #endif /* CONFIG_CARL9170_WPC */
1996 #ifdef CONFIG_CARL9170_HWRNG
1997 err
= carl9170_register_hwrng(ar
);
2000 #endif /* CONFIG_CARL9170_HWRNG */
2002 dev_info(&ar
->udev
->dev
, "Atheros AR9170 is registered as '%s'\n",
2003 wiphy_name(ar
->hw
->wiphy
));
2008 carl9170_unregister(ar
);
2012 void carl9170_unregister(struct ar9170
*ar
)
2014 if (!ar
->registered
)
2017 ar
->registered
= false;
2019 #ifdef CONFIG_CARL9170_LEDS
2020 carl9170_led_unregister(ar
);
2021 #endif /* CONFIG_CARL9170_LEDS */
2023 #ifdef CONFIG_CARL9170_DEBUGFS
2024 carl9170_debugfs_unregister(ar
);
2025 #endif /* CONFIG_CARL9170_DEBUGFS */
2027 #ifdef CONFIG_CARL9170_WPC
2029 input_unregister_device(ar
->wps
.pbc
);
2032 #endif /* CONFIG_CARL9170_WPC */
2034 #ifdef CONFIG_CARL9170_HWRNG
2035 carl9170_unregister_hwrng(ar
);
2036 #endif /* CONFIG_CARL9170_HWRNG */
2038 carl9170_cancel_worker(ar
);
2039 cancel_work_sync(&ar
->restart_work
);
2041 ieee80211_unregister_hw(ar
->hw
);
2044 void carl9170_free(struct ar9170
*ar
)
2046 WARN_ON(ar
->registered
);
2047 WARN_ON(IS_INITIALIZED(ar
));
2049 kfree_skb(ar
->rx_failover
);
2050 ar
->rx_failover
= NULL
;
2052 kfree(ar
->mem_bitmap
);
2053 ar
->mem_bitmap
= NULL
;
2058 mutex_destroy(&ar
->mutex
);
2060 ieee80211_free_hw(ar
->hw
);