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/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>
50 static bool modparam_nohwcrypt;
51 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, 0444);
52 MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
55 module_param_named(noht, modparam_noht, int, 0444);
56 MODULE_PARM_DESC(noht, "Disable MPDU aggregation.");
58 #define RATE(_bitrate, _hw_rate, _txpidx, _flags) { \
59 .bitrate = (_bitrate), \
61 .hw_value = (_hw_rate) | (_txpidx) << 4, \
64 struct ieee80211_rate __carl9170_ratetable[] = {
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),
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
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!
89 #define CHAN(_freq, _idx) { \
90 .center_freq = (_freq), \
92 .max_power = 18, /* XXX */ \
95 static struct ieee80211_channel carl9170_2ghz_chantable[] = {
112 static struct ieee80211_channel carl9170_5ghz_chantable[] = {
151 #define CARL9170_HT_CAP \
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, \
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, \
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,
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,
184 static void carl9170_ampdu_gc(struct ar9170 *ar)
186 struct carl9170_sta_tid *tid_info;
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);
198 spin_unlock_bh(&ar->tx_ampdu_list_lock);
201 rcu_assign_pointer(ar->tx_ampdu_iter, tid_info);
206 while (!list_empty(&tid_gc)) {
208 tid_info = list_first_entry(&tid_gc, struct carl9170_sta_tid,
211 while ((skb = __skb_dequeue(&tid_info->queue)))
212 carl9170_tx_status(ar, skb, false);
214 list_del_init(&tid_info->tmp_list);
219 static void carl9170_flush(struct ar9170 *ar, bool drop_queued)
225 * We can only drop frames which have not been uploaded
229 for (i = 0; i < ar->hw->queues; i++) {
232 while ((skb = skb_dequeue(&ar->tx_pending[i]))) {
233 struct ieee80211_tx_info *info;
235 info = IEEE80211_SKB_CB(skb);
236 if (info->flags & IEEE80211_TX_CTL_AMPDU)
237 atomic_dec(&ar->tx_ampdu_upload);
239 carl9170_tx_status(ar, skb, false);
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);
249 static void carl9170_flush_ba(struct ar9170 *ar)
251 struct sk_buff_head free;
252 struct carl9170_sta_tid *tid_info;
255 __skb_queue_head_init(&free);
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;
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);
269 spin_unlock_bh(&ar->tx_ampdu_list_lock);
272 while ((skb = __skb_dequeue(&free)))
273 carl9170_tx_status(ar, skb, false);
276 static void carl9170_zap_queues(struct ar9170 *ar)
278 struct carl9170_vif_info *cvif;
281 carl9170_ampdu_gc(ar);
283 carl9170_flush_ba(ar);
284 carl9170_flush(ar, true);
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])) {
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);
298 spin_unlock_bh(&ar->tx_status[i].lock);
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);
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;
310 bitmap_zero(ar->mem_bitmap, ar->fw.mem_blocks);
313 list_for_each_entry_rcu(cvif, &ar->vif_list, list) {
314 spin_lock_bh(&ar->beacon_lock);
315 dev_kfree_skb_any(cvif->beacon);
317 spin_unlock_bh(&ar->beacon_lock);
321 atomic_set(&ar->tx_ampdu_upload, 0);
322 atomic_set(&ar->tx_ampdu_scheduler, 0);
323 atomic_set(&ar->tx_total_pending, 0);
324 atomic_set(&ar->tx_total_queued, 0);
325 atomic_set(&ar->mem_free_blocks, ar->fw.mem_blocks);
328 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
330 queue.aifs = ai_fs; \
331 queue.cw_min = cwmin; \
332 queue.cw_max = cwmax; \
333 queue.txop = _txop; \
336 static int carl9170_op_start(struct ieee80211_hw *hw)
338 struct ar9170 *ar = hw->priv;
341 mutex_lock(&ar->mutex);
343 carl9170_zap_queues(ar);
345 /* reset QoS defaults */
346 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VO], 2, 3, 7, 47);
347 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_VI], 2, 7, 15, 94);
348 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BE], 3, 15, 1023, 0);
349 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_BK], 7, 15, 1023, 0);
350 CARL9170_FILL_QUEUE(ar->edcf[AR9170_TXQ_SPECIAL], 2, 3, 7, 0);
352 ar->current_factor = ar->current_density = -1;
353 /* "The first key is unique." */
355 ar->filter_state = 0;
356 ar->ps.last_action = jiffies;
357 ar->ps.last_slept = jiffies;
358 ar->erp_mode = CARL9170_ERP_AUTO;
360 /* Set "disable hw crypto offload" whenever the module parameter
361 * nohwcrypt is true or if the firmware does not support it.
363 ar->disable_offload = modparam_nohwcrypt |
364 ar->fw.disable_offload_fw;
365 ar->rx_software_decryption = ar->disable_offload;
367 for (i = 0; i < ar->hw->queues; i++) {
368 ar->queue_stop_timeout[i] = jiffies;
369 ar->max_queue_stop_timeout[i] = 0;
372 atomic_set(&ar->mem_allocs, 0);
374 err = carl9170_usb_open(ar);
378 err = carl9170_init_mac(ar);
382 err = carl9170_set_qos(ar);
386 if (ar->fw.rx_filter) {
387 err = carl9170_rx_filter(ar, CARL9170_RX_FILTER_OTHER_RA |
388 CARL9170_RX_FILTER_CTL_OTHER | CARL9170_RX_FILTER_BAD);
393 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
394 AR9170_DMA_TRIGGER_RXQ);
398 /* Clear key-cache */
399 for (i = 0; i < AR9170_CAM_MAX_USER + 4; i++) {
400 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
405 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
410 if (i < AR9170_CAM_MAX_USER) {
411 err = carl9170_disable_key(ar, i);
417 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
419 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
420 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
422 ieee80211_wake_queues(ar->hw);
426 mutex_unlock(&ar->mutex);
430 static void carl9170_cancel_worker(struct ar9170 *ar)
432 cancel_delayed_work_sync(&ar->stat_work);
433 cancel_delayed_work_sync(&ar->tx_janitor);
434 #ifdef CONFIG_CARL9170_LEDS
435 cancel_delayed_work_sync(&ar->led_work);
436 #endif /* CONFIG_CARL9170_LEDS */
437 cancel_work_sync(&ar->ps_work);
438 cancel_work_sync(&ar->ping_work);
439 cancel_work_sync(&ar->ampdu_work);
442 static void carl9170_op_stop(struct ieee80211_hw *hw)
444 struct ar9170 *ar = hw->priv;
446 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
448 ieee80211_stop_queues(ar->hw);
450 mutex_lock(&ar->mutex);
451 if (IS_ACCEPTING_CMD(ar)) {
452 RCU_INIT_POINTER(ar->beacon_iter, NULL);
454 carl9170_led_set_state(ar, 0);
457 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
458 carl9170_usb_stop(ar);
461 carl9170_zap_queues(ar);
462 mutex_unlock(&ar->mutex);
464 carl9170_cancel_worker(ar);
467 static void carl9170_restart_work(struct work_struct *work)
469 struct ar9170 *ar = container_of(work, struct ar9170,
474 ar->filter_state = 0;
475 carl9170_cancel_worker(ar);
477 mutex_lock(&ar->mutex);
478 if (!ar->force_usb_reset) {
479 err = carl9170_usb_restart(ar);
480 if (net_ratelimit()) {
482 dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err);
484 dev_info(&ar->udev->dev, "device restarted successfully.\n");
487 carl9170_zap_queues(ar);
488 mutex_unlock(&ar->mutex);
490 if (!err && !ar->force_usb_reset) {
491 ar->restart_counter++;
492 atomic_set(&ar->pending_restarts, 0);
494 ieee80211_restart_hw(ar->hw);
497 * The reset was unsuccessful and the device seems to
498 * be dead. But there's still one option: a low-level
499 * usb subsystem reset...
502 carl9170_usb_reset(ar);
506 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
508 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
511 * Sometimes, an error can trigger several different reset events.
512 * By ignoring these *surplus* reset events, the device won't be
513 * killed again, right after it has recovered.
515 if (atomic_inc_return(&ar->pending_restarts) > 1) {
516 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
520 ieee80211_stop_queues(ar->hw);
522 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
524 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
525 !WARN_ON(r >= __CARL9170_RR_LAST))
531 if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset)
532 ar->force_usb_reset = true;
534 ieee80211_queue_work(ar->hw, &ar->restart_work);
537 * At this point, the device instance might have vanished/disabled.
538 * So, don't put any code which access the ar9170 struct
539 * without proper protection.
543 static void carl9170_ping_work(struct work_struct *work)
545 struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
551 mutex_lock(&ar->mutex);
552 err = carl9170_echo_test(ar, 0xdeadbeef);
554 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
555 mutex_unlock(&ar->mutex);
558 static int carl9170_init_interface(struct ar9170 *ar,
559 struct ieee80211_vif *vif)
561 struct ath_common *common = &ar->common;
565 WARN_ON_ONCE(IS_STARTED(ar));
569 memcpy(common->macaddr, vif->addr, ETH_ALEN);
571 /* We have to fall back to software crypto, whenever
572 * the user choose to participates in an IBSS. HW
573 * offload for IBSS RSN is not supported by this driver.
575 * NOTE: If the previous main interface has already
576 * disabled hw crypto offload, we have to keep this
577 * previous disable_offload setting as it was.
578 * Altough ideally, we should notify mac80211 and tell
579 * it to forget about any HW crypto offload for now.
581 ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) &&
582 (vif->type != NL80211_IFTYPE_AP));
584 /* The driver used to have P2P GO+CLIENT support,
585 * but since this was dropped and we don't know if
586 * there are any gremlins lurking in the shadows,
587 * so best we keep HW offload disabled for P2P.
589 ar->disable_offload |= vif->p2p;
591 ar->rx_software_decryption = ar->disable_offload;
593 err = carl9170_set_operating_mode(ar);
597 static int carl9170_op_add_interface(struct ieee80211_hw *hw,
598 struct ieee80211_vif *vif)
600 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
601 struct ieee80211_vif *main_vif, *old_main = NULL;
602 struct ar9170 *ar = hw->priv;
603 int vif_id = -1, err = 0;
605 mutex_lock(&ar->mutex);
607 if (vif_priv->active) {
609 * Skip the interface structure initialization,
610 * if the vif survived the _restart call.
612 vif_id = vif_priv->id;
613 vif_priv->enable_beacon = false;
615 spin_lock_bh(&ar->beacon_lock);
616 dev_kfree_skb_any(vif_priv->beacon);
617 vif_priv->beacon = NULL;
618 spin_unlock_bh(&ar->beacon_lock);
623 /* Because the AR9170 HW's MAC doesn't provide full support for
624 * multiple, independent interfaces [of different operation modes].
625 * We have to select ONE main interface [main mode of HW], but we
626 * can have multiple slaves [AKA: entry in the ACK-table].
628 * The first (from HEAD/TOP) interface in the ar->vif_list is
629 * always the main intf. All following intfs in this list
630 * are considered to be slave intfs.
632 main_vif = carl9170_get_main_vif(ar);
635 switch (main_vif->type) {
636 case NL80211_IFTYPE_STATION:
637 if (vif->type == NL80211_IFTYPE_STATION)
645 case NL80211_IFTYPE_MESH_POINT:
646 case NL80211_IFTYPE_AP:
647 if ((vif->type == NL80211_IFTYPE_STATION) ||
648 (vif->type == NL80211_IFTYPE_AP) ||
649 (vif->type == NL80211_IFTYPE_MESH_POINT))
662 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
671 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
673 vif_priv->active = true;
674 vif_priv->id = vif_id;
675 vif_priv->enable_beacon = false;
678 /* We end up in here, if the main interface is being replaced.
679 * Put the new main interface at the HEAD of the list and the
680 * previous inteface will automatically become second in line.
682 list_add_rcu(&vif_priv->list, &ar->vif_list);
684 /* Add new inteface. If the list is empty, it will become the
685 * main inteface, otherwise it will be slave.
687 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
689 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
692 main_vif = carl9170_get_main_vif(ar);
694 if (main_vif == vif) {
695 rcu_assign_pointer(ar->beacon_iter, vif_priv);
699 struct carl9170_vif_info *old_main_priv =
700 (void *) old_main->drv_priv;
701 /* downgrade old main intf to slave intf.
702 * NOTE: We are no longer under rcu_read_lock.
703 * But we are still holding ar->mutex, so the
704 * vif data [id, addr] is safe.
706 err = carl9170_mod_virtual_mac(ar, old_main_priv->id,
712 err = carl9170_init_interface(ar, vif);
717 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
723 if (ar->fw.tx_seq_table) {
724 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
731 if (err && (vif_id >= 0)) {
732 vif_priv->active = false;
733 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
735 RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL);
736 list_del_rcu(&vif_priv->list);
737 mutex_unlock(&ar->mutex);
741 ar->ps.off_override |= PS_OFF_VIF;
743 mutex_unlock(&ar->mutex);
749 static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
750 struct ieee80211_vif *vif)
752 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
753 struct ieee80211_vif *main_vif;
754 struct ar9170 *ar = hw->priv;
757 mutex_lock(&ar->mutex);
759 if (WARN_ON_ONCE(!vif_priv->active))
765 main_vif = carl9170_get_main_vif(ar);
769 vif_priv->active = false;
770 WARN_ON(vif_priv->enable_beacon);
771 vif_priv->enable_beacon = false;
772 list_del_rcu(&vif_priv->list);
773 RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL);
775 if (vif == main_vif) {
779 WARN_ON(carl9170_init_interface(ar,
780 carl9170_get_main_vif(ar)));
782 carl9170_set_operating_mode(ar);
787 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
790 carl9170_update_beacon(ar, false);
791 carl9170_flush_cab(ar, id);
793 spin_lock_bh(&ar->beacon_lock);
794 dev_kfree_skb_any(vif_priv->beacon);
795 vif_priv->beacon = NULL;
796 spin_unlock_bh(&ar->beacon_lock);
798 bitmap_release_region(&ar->vif_bitmap, id, 0);
800 carl9170_set_beacon_timers(ar);
803 ar->ps.off_override &= ~PS_OFF_VIF;
806 mutex_unlock(&ar->mutex);
811 void carl9170_ps_check(struct ar9170 *ar)
813 ieee80211_queue_work(ar->hw, &ar->ps_work);
816 /* caller must hold ar->mutex */
817 static int carl9170_ps_update(struct ar9170 *ar)
822 if (!ar->ps.off_override)
823 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
825 if (ps != ar->ps.state) {
826 err = carl9170_powersave(ar, ps);
830 if (ar->ps.state && !ps) {
831 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
836 ar->ps.last_slept = jiffies;
838 ar->ps.last_action = jiffies;
845 static void carl9170_ps_work(struct work_struct *work)
847 struct ar9170 *ar = container_of(work, struct ar9170,
849 mutex_lock(&ar->mutex);
851 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
852 mutex_unlock(&ar->mutex);
855 static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
860 err = carl9170_get_noisefloor(ar);
865 if (ar->fw.hw_counters) {
866 err = carl9170_collect_tally(ar);
872 memset(&ar->tally, 0, sizeof(ar->tally));
877 static void carl9170_stat_work(struct work_struct *work)
879 struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
882 mutex_lock(&ar->mutex);
883 err = carl9170_update_survey(ar, false, true);
884 mutex_unlock(&ar->mutex);
889 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
890 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
893 static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
895 struct ar9170 *ar = hw->priv;
898 mutex_lock(&ar->mutex);
899 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
904 if (changed & IEEE80211_CONF_CHANGE_PS) {
905 err = carl9170_ps_update(ar);
910 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
915 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
916 enum nl80211_channel_type channel_type =
917 cfg80211_get_chandef_type(&hw->conf.chandef);
919 /* adjust slot time for 5 GHz */
920 err = carl9170_set_slot_time(ar);
924 err = carl9170_update_survey(ar, true, false);
928 err = carl9170_set_channel(ar, hw->conf.chandef.chan,
933 err = carl9170_update_survey(ar, false, true);
937 err = carl9170_set_dyn_sifs_ack(ar);
941 err = carl9170_set_rts_cts_rate(ar);
946 if (changed & IEEE80211_CONF_CHANGE_POWER) {
947 err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan);
953 mutex_unlock(&ar->mutex);
957 static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
958 struct netdev_hw_addr_list *mc_list)
960 struct netdev_hw_addr *ha;
963 /* always get broadcast frames */
964 mchash = 1ULL << (0xff >> 2);
966 netdev_hw_addr_list_for_each(ha, mc_list)
967 mchash |= 1ULL << (ha->addr[5] >> 2);
972 static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
973 unsigned int changed_flags,
974 unsigned int *new_flags,
977 struct ar9170 *ar = hw->priv;
979 /* mask supported flags */
980 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
982 if (!IS_ACCEPTING_CMD(ar))
985 mutex_lock(&ar->mutex);
987 ar->filter_state = *new_flags;
989 * We can support more by setting the sniffer bit and
990 * then checking the error flags, later.
993 if (*new_flags & FIF_ALLMULTI)
996 if (multicast != ar->cur_mc_hash)
997 WARN_ON(carl9170_update_multicast(ar, multicast));
999 if (changed_flags & FIF_OTHER_BSS) {
1000 ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS);
1002 WARN_ON(carl9170_set_operating_mode(ar));
1005 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
1008 if (!ar->fw.ba_filter)
1009 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1011 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
1012 rx_filter |= CARL9170_RX_FILTER_BAD;
1014 if (!(*new_flags & FIF_CONTROL))
1015 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1017 if (!(*new_flags & FIF_PSPOLL))
1018 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
1020 if (!(*new_flags & FIF_OTHER_BSS)) {
1021 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
1022 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
1025 WARN_ON(carl9170_rx_filter(ar, rx_filter));
1028 mutex_unlock(&ar->mutex);
1032 static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
1033 struct ieee80211_vif *vif,
1034 struct ieee80211_bss_conf *bss_conf,
1037 struct ar9170 *ar = hw->priv;
1038 struct ath_common *common = &ar->common;
1040 struct carl9170_vif_info *vif_priv;
1041 struct ieee80211_vif *main_vif;
1043 mutex_lock(&ar->mutex);
1044 vif_priv = (void *) vif->drv_priv;
1045 main_vif = carl9170_get_main_vif(ar);
1046 if (WARN_ON(!main_vif))
1049 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1050 struct carl9170_vif_info *iter;
1053 vif_priv->enable_beacon = bss_conf->enable_beacon;
1055 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
1056 if (iter->active && iter->enable_beacon)
1062 ar->beacon_enabled = i;
1065 if (changed & BSS_CHANGED_BEACON) {
1066 err = carl9170_update_beacon(ar, false);
1071 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
1072 BSS_CHANGED_BEACON_INT)) {
1074 if (main_vif != vif) {
1075 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
1076 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
1080 * Therefore a hard limit for the broadcast traffic should
1081 * prevent false alarms.
1083 if (vif->type != NL80211_IFTYPE_STATION &&
1084 (bss_conf->beacon_int * bss_conf->dtim_period >=
1085 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
1090 err = carl9170_set_beacon_timers(ar);
1095 if (changed & BSS_CHANGED_HT) {
1102 if (main_vif != vif)
1106 * The following settings can only be changed by the
1110 if (changed & BSS_CHANGED_BSSID) {
1111 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1112 err = carl9170_set_operating_mode(ar);
1117 if (changed & BSS_CHANGED_ASSOC) {
1118 ar->common.curaid = bss_conf->aid;
1119 err = carl9170_set_beacon_timers(ar);
1124 if (changed & BSS_CHANGED_ERP_SLOT) {
1125 err = carl9170_set_slot_time(ar);
1130 if (changed & BSS_CHANGED_BASIC_RATES) {
1131 err = carl9170_set_mac_rates(ar);
1137 WARN_ON_ONCE(err && IS_STARTED(ar));
1138 mutex_unlock(&ar->mutex);
1141 static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw,
1142 struct ieee80211_vif *vif)
1144 struct ar9170 *ar = hw->priv;
1145 struct carl9170_tsf_rsp tsf;
1148 mutex_lock(&ar->mutex);
1149 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1150 0, NULL, sizeof(tsf), &tsf);
1151 mutex_unlock(&ar->mutex);
1155 return le64_to_cpu(tsf.tsf_64);
1158 static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1159 struct ieee80211_vif *vif,
1160 struct ieee80211_sta *sta,
1161 struct ieee80211_key_conf *key)
1163 struct ar9170 *ar = hw->priv;
1167 if (ar->disable_offload || !vif)
1170 /* Fall back to software encryption whenever the driver is connected
1171 * to more than one network.
1173 * This is very unfortunate, because some machines cannot handle
1174 * the high througput speed in 802.11n networks.
1177 if (!is_main_vif(ar, vif)) {
1178 mutex_lock(&ar->mutex);
1183 * While the hardware supports *catch-all* key, for offloading
1184 * group-key en-/de-cryption. The way of how the hardware
1185 * decides which keyId maps to which key, remains a mystery...
1187 if ((vif->type != NL80211_IFTYPE_STATION &&
1188 vif->type != NL80211_IFTYPE_ADHOC) &&
1189 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1192 switch (key->cipher) {
1193 case WLAN_CIPHER_SUITE_WEP40:
1194 ktype = AR9170_ENC_ALG_WEP64;
1196 case WLAN_CIPHER_SUITE_WEP104:
1197 ktype = AR9170_ENC_ALG_WEP128;
1199 case WLAN_CIPHER_SUITE_TKIP:
1200 ktype = AR9170_ENC_ALG_TKIP;
1202 case WLAN_CIPHER_SUITE_CCMP:
1203 ktype = AR9170_ENC_ALG_AESCCMP;
1204 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1210 mutex_lock(&ar->mutex);
1211 if (cmd == SET_KEY) {
1212 if (!IS_STARTED(ar)) {
1217 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1220 i = 64 + key->keyidx;
1222 for (i = 0; i < 64; i++)
1223 if (!(ar->usedkeys & BIT(i)))
1229 key->hw_key_idx = i;
1231 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1233 min_t(u8, 16, key->keylen));
1237 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1238 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1245 * hardware is not capable generating MMIC
1246 * of fragmented frames!
1248 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1252 ar->usedkeys |= BIT(i);
1254 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1256 if (!IS_STARTED(ar)) {
1257 /* The device is gone... together with the key ;-) */
1262 if (key->hw_key_idx < 64) {
1263 ar->usedkeys &= ~BIT(key->hw_key_idx);
1265 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1266 AR9170_ENC_ALG_NONE, 0,
1271 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1272 err = carl9170_upload_key(ar, key->hw_key_idx,
1274 AR9170_ENC_ALG_NONE,
1282 err = carl9170_disable_key(ar, key->hw_key_idx);
1288 mutex_unlock(&ar->mutex);
1292 if (!ar->rx_software_decryption) {
1293 ar->rx_software_decryption = true;
1294 carl9170_set_operating_mode(ar);
1296 mutex_unlock(&ar->mutex);
1300 static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1301 struct ieee80211_vif *vif,
1302 struct ieee80211_sta *sta)
1304 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1307 atomic_set(&sta_info->pending_frames, 0);
1309 if (sta->deflink.ht_cap.ht_supported) {
1310 if (sta->deflink.ht_cap.ampdu_density > 6) {
1312 * HW does support 16us AMPDU density.
1313 * No HT-Xmit for station.
1319 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++)
1320 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1322 sta_info->ampdu_max_len = 1 << (3 + sta->deflink.ht_cap.ampdu_factor);
1323 sta_info->ht_sta = true;
1329 static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1330 struct ieee80211_vif *vif,
1331 struct ieee80211_sta *sta)
1333 struct ar9170 *ar = hw->priv;
1334 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1336 bool cleanup = false;
1338 if (sta->deflink.ht_cap.ht_supported) {
1340 sta_info->ht_sta = false;
1343 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) {
1344 struct carl9170_sta_tid *tid_info;
1346 tid_info = rcu_dereference(sta_info->agg[i]);
1347 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1352 spin_lock_bh(&ar->tx_ampdu_list_lock);
1353 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1354 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1355 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1361 carl9170_ampdu_gc(ar);
1367 static int carl9170_op_conf_tx(struct ieee80211_hw *hw,
1368 struct ieee80211_vif *vif, u16 queue,
1369 const struct ieee80211_tx_queue_params *param)
1371 struct ar9170 *ar = hw->priv;
1374 mutex_lock(&ar->mutex);
1375 memcpy(&ar->edcf[ar9170_qmap(queue)], param, sizeof(*param));
1376 ret = carl9170_set_qos(ar);
1377 mutex_unlock(&ar->mutex);
1381 static void carl9170_ampdu_work(struct work_struct *work)
1383 struct ar9170 *ar = container_of(work, struct ar9170,
1386 if (!IS_STARTED(ar))
1389 mutex_lock(&ar->mutex);
1390 carl9170_ampdu_gc(ar);
1391 mutex_unlock(&ar->mutex);
1394 static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1395 struct ieee80211_vif *vif,
1396 struct ieee80211_ampdu_params *params)
1398 struct ieee80211_sta *sta = params->sta;
1399 enum ieee80211_ampdu_mlme_action action = params->action;
1400 u16 tid = params->tid;
1401 u16 *ssn = ¶ms->ssn;
1402 struct ar9170 *ar = hw->priv;
1403 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1404 struct carl9170_sta_tid *tid_info;
1410 case IEEE80211_AMPDU_TX_START:
1411 if (!sta_info->ht_sta)
1414 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1419 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1420 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1421 tid_info->tid = tid;
1422 tid_info->max = sta_info->ampdu_max_len;
1423 tid_info->sta = sta;
1424 tid_info->vif = vif;
1426 INIT_LIST_HEAD(&tid_info->list);
1427 INIT_LIST_HEAD(&tid_info->tmp_list);
1428 skb_queue_head_init(&tid_info->queue);
1429 spin_lock_init(&tid_info->lock);
1431 spin_lock_bh(&ar->tx_ampdu_list_lock);
1432 ar->tx_ampdu_list_len++;
1433 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1434 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1435 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1437 return IEEE80211_AMPDU_TX_START_IMMEDIATE;
1439 case IEEE80211_AMPDU_TX_STOP_CONT:
1440 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1441 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1443 tid_info = rcu_dereference(sta_info->agg[tid]);
1445 spin_lock_bh(&ar->tx_ampdu_list_lock);
1446 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1447 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1448 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1451 RCU_INIT_POINTER(sta_info->agg[tid], NULL);
1454 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1455 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1458 case IEEE80211_AMPDU_TX_OPERATIONAL:
1460 tid_info = rcu_dereference(sta_info->agg[tid]);
1462 sta_info->stats[tid].clear = true;
1463 sta_info->stats[tid].req = false;
1466 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1467 tid_info->state = CARL9170_TID_STATE_IDLE;
1471 if (WARN_ON_ONCE(!tid_info))
1476 case IEEE80211_AMPDU_RX_START:
1477 case IEEE80211_AMPDU_RX_STOP:
1478 /* Handled by hardware */
1488 #ifdef CONFIG_CARL9170_WPC
1489 static int carl9170_register_wps_button(struct ar9170 *ar)
1491 struct input_dev *input;
1494 if (!(ar->features & CARL9170_WPS_BUTTON))
1497 input = devm_input_allocate_device(&ar->udev->dev);
1501 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1502 wiphy_name(ar->hw->wiphy));
1504 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1505 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1507 input->name = ar->wps.name;
1508 input->phys = ar->wps.phys;
1509 input->id.bustype = BUS_USB;
1510 input->dev.parent = &ar->hw->wiphy->dev;
1512 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1514 err = input_register_device(input);
1518 ar->wps.pbc = input;
1521 #endif /* CONFIG_CARL9170_WPC */
1523 #ifdef CONFIG_CARL9170_HWRNG
1524 static int carl9170_rng_get(struct ar9170 *ar)
1527 #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
1528 #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
1530 static const __le32 rng_load[RW] = {
1531 [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)};
1535 unsigned int i, off = 0, transfer, count;
1538 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
1540 if (!IS_ACCEPTING_CMD(ar))
1543 count = ARRAY_SIZE(ar->rng.cache);
1545 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1546 RB, (u8 *) rng_load,
1551 transfer = min_t(unsigned int, count, RW);
1552 for (i = 0; i < transfer; i++)
1553 ar->rng.cache[off + i] = buf[i];
1559 ar->rng.cache_idx = 0;
1566 static int carl9170_rng_read(struct hwrng *rng, u32 *data)
1568 struct ar9170 *ar = (struct ar9170 *)rng->priv;
1571 mutex_lock(&ar->mutex);
1572 if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) {
1573 ret = carl9170_rng_get(ar);
1575 mutex_unlock(&ar->mutex);
1580 *data = ar->rng.cache[ar->rng.cache_idx++];
1581 mutex_unlock(&ar->mutex);
1586 static int carl9170_register_hwrng(struct ar9170 *ar)
1590 snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name),
1591 "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy));
1592 ar->rng.rng.name = ar->rng.name;
1593 ar->rng.rng.data_read = carl9170_rng_read;
1594 ar->rng.rng.priv = (unsigned long)ar;
1596 err = devm_hwrng_register(&ar->udev->dev, &ar->rng.rng);
1598 dev_err(&ar->udev->dev, "Failed to register the random "
1599 "number generator (%d)\n", err);
1603 return carl9170_rng_get(ar);
1605 #endif /* CONFIG_CARL9170_HWRNG */
1607 static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1608 struct survey_info *survey)
1610 struct ar9170 *ar = hw->priv;
1611 struct ieee80211_channel *chan;
1612 struct ieee80211_supported_band *band;
1619 if (idx == chan->hw_value) {
1620 mutex_lock(&ar->mutex);
1621 err = carl9170_update_survey(ar, false, true);
1622 mutex_unlock(&ar->mutex);
1627 for (b = 0; b < NUM_NL80211_BANDS; b++) {
1628 band = ar->hw->wiphy->bands[b];
1633 for (i = 0; i < band->n_channels; i++) {
1634 if (band->channels[i].hw_value == idx) {
1635 chan = &band->channels[i];
1643 memcpy(survey, &ar->survey[idx], sizeof(*survey));
1645 survey->channel = chan;
1646 survey->filled = SURVEY_INFO_NOISE_DBM;
1648 if (ar->channel == chan)
1649 survey->filled |= SURVEY_INFO_IN_USE;
1651 if (ar->fw.hw_counters) {
1652 survey->filled |= SURVEY_INFO_TIME |
1653 SURVEY_INFO_TIME_BUSY |
1654 SURVEY_INFO_TIME_TX;
1660 static void carl9170_op_flush(struct ieee80211_hw *hw,
1661 struct ieee80211_vif *vif,
1662 u32 queues, bool drop)
1664 struct ar9170 *ar = hw->priv;
1667 mutex_lock(&ar->mutex);
1668 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1669 carl9170_flush_cab(ar, vid);
1671 carl9170_flush(ar, drop);
1672 mutex_unlock(&ar->mutex);
1675 static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1676 struct ieee80211_low_level_stats *stats)
1678 struct ar9170 *ar = hw->priv;
1680 memset(stats, 0, sizeof(*stats));
1681 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1682 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1686 static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1687 struct ieee80211_vif *vif,
1688 enum sta_notify_cmd cmd,
1689 struct ieee80211_sta *sta)
1691 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1694 case STA_NOTIFY_SLEEP:
1695 sta_info->sleeping = true;
1696 if (atomic_read(&sta_info->pending_frames))
1697 ieee80211_sta_block_awake(hw, sta, true);
1700 case STA_NOTIFY_AWAKE:
1701 sta_info->sleeping = false;
1706 static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
1708 struct ar9170 *ar = hw->priv;
1710 return !!atomic_read(&ar->tx_total_queued);
1713 static const struct ieee80211_ops carl9170_ops = {
1714 .start = carl9170_op_start,
1715 .stop = carl9170_op_stop,
1716 .tx = carl9170_op_tx,
1717 .flush = carl9170_op_flush,
1718 .add_interface = carl9170_op_add_interface,
1719 .remove_interface = carl9170_op_remove_interface,
1720 .config = carl9170_op_config,
1721 .prepare_multicast = carl9170_op_prepare_multicast,
1722 .configure_filter = carl9170_op_configure_filter,
1723 .conf_tx = carl9170_op_conf_tx,
1724 .bss_info_changed = carl9170_op_bss_info_changed,
1725 .get_tsf = carl9170_op_get_tsf,
1726 .set_key = carl9170_op_set_key,
1727 .sta_add = carl9170_op_sta_add,
1728 .sta_remove = carl9170_op_sta_remove,
1729 .sta_notify = carl9170_op_sta_notify,
1730 .get_survey = carl9170_op_get_survey,
1731 .get_stats = carl9170_op_get_stats,
1732 .ampdu_action = carl9170_op_ampdu_action,
1733 .tx_frames_pending = carl9170_tx_frames_pending,
1736 void *carl9170_alloc(size_t priv_size)
1738 struct ieee80211_hw *hw;
1740 struct sk_buff *skb;
1744 * this buffer is used for rx stream reconstruction.
1745 * Under heavy load this device (or the transport layer?)
1746 * tends to split the streams into separate rx descriptors.
1749 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1753 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1759 ar->rx_failover = skb;
1761 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1762 ar->rx_has_plcp = false;
1765 * Here's a hidden pitfall!
1767 * All 4 AC queues work perfectly well under _legacy_ operation.
1768 * However as soon as aggregation is enabled, the traffic flow
1769 * gets very bumpy. Therefore we have to _switch_ to a
1770 * software AC with a single HW queue.
1772 hw->queues = __AR9170_NUM_TXQ;
1774 mutex_init(&ar->mutex);
1775 spin_lock_init(&ar->beacon_lock);
1776 spin_lock_init(&ar->cmd_lock);
1777 spin_lock_init(&ar->tx_stats_lock);
1778 spin_lock_init(&ar->tx_ampdu_list_lock);
1779 spin_lock_init(&ar->mem_lock);
1780 spin_lock_init(&ar->state_lock);
1781 atomic_set(&ar->pending_restarts, 0);
1783 for (i = 0; i < ar->hw->queues; i++) {
1784 skb_queue_head_init(&ar->tx_status[i]);
1785 skb_queue_head_init(&ar->tx_pending[i]);
1787 INIT_LIST_HEAD(&ar->bar_list[i]);
1788 spin_lock_init(&ar->bar_list_lock[i]);
1790 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1791 INIT_WORK(&ar->ping_work, carl9170_ping_work);
1792 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1793 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1794 INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
1795 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1796 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1797 rcu_assign_pointer(ar->tx_ampdu_iter,
1798 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1800 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1801 INIT_LIST_HEAD(&ar->vif_list);
1802 init_completion(&ar->tx_flush);
1804 /* firmware decides which modes we support */
1805 hw->wiphy->interface_modes = 0;
1807 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1808 ieee80211_hw_set(hw, MFP_CAPABLE);
1809 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1810 ieee80211_hw_set(hw, SUPPORTS_PS);
1811 ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
1812 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
1813 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
1814 ieee80211_hw_set(hw, SIGNAL_DBM);
1815 ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
1817 if (!modparam_noht) {
1819 * see the comment above, why we allow the user
1820 * to disable HT by a module parameter.
1822 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1825 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1826 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1827 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1829 hw->max_rates = CARL9170_TX_MAX_RATES;
1830 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1832 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1833 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1835 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1841 return ERR_PTR(-ENOMEM);
1844 static int carl9170_read_eeprom(struct ar9170 *ar)
1846 #define RW 8 /* number of words to read at once */
1847 #define RB (sizeof(u32) * RW)
1848 u8 *eeprom = (void *)&ar->eeprom;
1852 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1854 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1856 /* don't want to handle trailing remains */
1857 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1860 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) {
1861 for (j = 0; j < RW; j++)
1862 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1865 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1866 RB, (u8 *) &offsets,
1867 RB, eeprom + RB * i);
1877 static int carl9170_parse_eeprom(struct ar9170 *ar)
1879 struct ath_regulatory *regulatory = &ar->common.regulatory;
1880 unsigned int rx_streams, tx_streams, tx_params = 0;
1884 if (ar->eeprom.length == cpu_to_le16(0xffff))
1887 rx_streams = hweight8(ar->eeprom.rx_mask);
1888 tx_streams = hweight8(ar->eeprom.tx_mask);
1890 if (rx_streams != tx_streams) {
1891 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1893 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1894 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1896 tx_params |= (tx_streams - 1) <<
1897 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1899 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1900 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1903 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1904 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] =
1905 &carl9170_band_2GHz;
1906 chans += carl9170_band_2GHz.n_channels;
1909 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1910 ar->hw->wiphy->bands[NL80211_BAND_5GHZ] =
1911 &carl9170_band_5GHz;
1912 chans += carl9170_band_5GHz.n_channels;
1919 ar->survey = devm_kcalloc(&ar->udev->dev, chans,
1920 sizeof(struct survey_info), GFP_KERNEL);
1923 ar->num_channels = chans;
1925 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1927 /* second part of wiphy init */
1928 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1933 static void carl9170_reg_notifier(struct wiphy *wiphy,
1934 struct regulatory_request *request)
1936 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1937 struct ar9170 *ar = hw->priv;
1939 ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1942 int carl9170_register(struct ar9170 *ar)
1944 struct ath_regulatory *regulatory = &ar->common.regulatory;
1947 ar->mem_bitmap = devm_bitmap_zalloc(&ar->udev->dev, ar->fw.mem_blocks, GFP_KERNEL);
1948 if (!ar->mem_bitmap)
1951 /* try to read EEPROM, init MAC addr */
1952 err = carl9170_read_eeprom(ar);
1956 err = carl9170_parse_eeprom(ar);
1960 err = ath_regd_init(regulatory, ar->hw->wiphy,
1961 carl9170_reg_notifier);
1965 if (modparam_noht) {
1966 carl9170_band_2GHz.ht_cap.ht_supported = false;
1967 carl9170_band_5GHz.ht_cap.ht_supported = false;
1970 for (i = 0; i < ar->fw.vif_num; i++) {
1971 ar->vif_priv[i].id = i;
1972 ar->vif_priv[i].vif = NULL;
1975 err = ieee80211_register_hw(ar->hw);
1979 /* mac80211 interface is now registered */
1980 ar->registered = true;
1982 if (!ath_is_world_regd(regulatory))
1983 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
1985 #ifdef CONFIG_CARL9170_DEBUGFS
1986 carl9170_debugfs_register(ar);
1987 #endif /* CONFIG_CARL9170_DEBUGFS */
1989 err = carl9170_led_init(ar);
1993 #ifdef CONFIG_CARL9170_LEDS
1994 err = carl9170_led_register(ar);
1997 #endif /* CONFIG_CARL9170_LEDS */
1999 #ifdef CONFIG_CARL9170_WPC
2000 err = carl9170_register_wps_button(ar);
2003 #endif /* CONFIG_CARL9170_WPC */
2005 #ifdef CONFIG_CARL9170_HWRNG
2006 err = carl9170_register_hwrng(ar);
2009 #endif /* CONFIG_CARL9170_HWRNG */
2011 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
2012 wiphy_name(ar->hw->wiphy));
2017 carl9170_unregister(ar);
2021 void carl9170_unregister(struct ar9170 *ar)
2023 if (!ar->registered)
2026 ar->registered = false;
2028 #ifdef CONFIG_CARL9170_LEDS
2029 carl9170_led_unregister(ar);
2030 #endif /* CONFIG_CARL9170_LEDS */
2032 #ifdef CONFIG_CARL9170_DEBUGFS
2033 carl9170_debugfs_unregister(ar);
2034 #endif /* CONFIG_CARL9170_DEBUGFS */
2036 carl9170_cancel_worker(ar);
2037 cancel_work_sync(&ar->restart_work);
2039 ieee80211_unregister_hw(ar->hw);
2042 void carl9170_free(struct ar9170 *ar)
2044 WARN_ON(ar->registered);
2045 WARN_ON(IS_INITIALIZED(ar));
2047 kfree_skb(ar->rx_failover);
2048 ar->rx_failover = NULL;
2050 mutex_destroy(&ar->mutex);
2052 ieee80211_free_hw(ar->hw);