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, S_IRUGO);
52 MODULE_PARM_DESC(nohwcrypt, "Disable hardware crypto offload.");
55 module_param_named(noht, modparam_noht, int, S_IRUGO);
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 for (i = 0; i < DIV_ROUND_UP(ar->fw.mem_blocks, BITS_PER_LONG); i++)
311 ar->mem_bitmap[i] = 0;
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);
318 spin_unlock_bh(&ar->beacon_lock);
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);
329 #define CARL9170_FILL_QUEUE(queue, ai_fs, cwmin, cwmax, _txop) \
331 queue.aifs = ai_fs; \
332 queue.cw_min = cwmin; \
333 queue.cw_max = cwmax; \
334 queue.txop = _txop; \
337 static int carl9170_op_start(struct ieee80211_hw *hw)
339 struct ar9170 *ar = hw->priv;
342 mutex_lock(&ar->mutex);
344 carl9170_zap_queues(ar);
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);
353 ar->current_factor = ar->current_density = -1;
354 /* "The first key is unique." */
356 ar->filter_state = 0;
357 ar->ps.last_action = jiffies;
358 ar->ps.last_slept = jiffies;
359 ar->erp_mode = CARL9170_ERP_AUTO;
361 /* Set "disable hw crypto offload" whenever the module parameter
362 * nohwcrypt is true or if the firmware does not support it.
364 ar->disable_offload = modparam_nohwcrypt |
365 ar->fw.disable_offload_fw;
366 ar->rx_software_decryption = ar->disable_offload;
368 for (i = 0; i < ar->hw->queues; i++) {
369 ar->queue_stop_timeout[i] = jiffies;
370 ar->max_queue_stop_timeout[i] = 0;
373 atomic_set(&ar->mem_allocs, 0);
375 err = carl9170_usb_open(ar);
379 err = carl9170_init_mac(ar);
383 err = carl9170_set_qos(ar);
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);
394 err = carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER,
395 AR9170_DMA_TRIGGER_RXQ);
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,
406 err = carl9170_upload_key(ar, i, NULL, AR9170_ENC_ALG_NONE,
411 if (i < AR9170_CAM_MAX_USER) {
412 err = carl9170_disable_key(ar, i);
418 carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
420 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
421 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
423 ieee80211_wake_queues(ar->hw);
427 mutex_unlock(&ar->mutex);
431 static void carl9170_cancel_worker(struct ar9170 *ar)
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);
443 static void carl9170_op_stop(struct ieee80211_hw *hw)
445 struct ar9170 *ar = hw->priv;
447 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
449 ieee80211_stop_queues(ar->hw);
451 mutex_lock(&ar->mutex);
452 if (IS_ACCEPTING_CMD(ar)) {
453 RCU_INIT_POINTER(ar->beacon_iter, NULL);
455 carl9170_led_set_state(ar, 0);
458 carl9170_write_reg(ar, AR9170_MAC_REG_DMA_TRIGGER, 0);
459 carl9170_usb_stop(ar);
462 carl9170_zap_queues(ar);
463 mutex_unlock(&ar->mutex);
465 carl9170_cancel_worker(ar);
468 static void carl9170_restart_work(struct work_struct *work)
470 struct ar9170 *ar = container_of(work, struct ar9170,
475 ar->filter_state = 0;
476 carl9170_cancel_worker(ar);
478 mutex_lock(&ar->mutex);
479 if (!ar->force_usb_reset) {
480 err = carl9170_usb_restart(ar);
481 if (net_ratelimit()) {
483 dev_err(&ar->udev->dev, "Failed to restart device (%d).\n", err);
485 dev_info(&ar->udev->dev, "device restarted successfully.\n");
488 carl9170_zap_queues(ar);
489 mutex_unlock(&ar->mutex);
491 if (!err && !ar->force_usb_reset) {
492 ar->restart_counter++;
493 atomic_set(&ar->pending_restarts, 0);
495 ieee80211_restart_hw(ar->hw);
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...
503 carl9170_usb_reset(ar);
507 void carl9170_restart(struct ar9170 *ar, const enum carl9170_restart_reasons r)
509 carl9170_set_state_when(ar, CARL9170_STARTED, CARL9170_IDLE);
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.
516 if (atomic_inc_return(&ar->pending_restarts) > 1) {
517 dev_dbg(&ar->udev->dev, "ignoring restart (%d)\n", r);
521 ieee80211_stop_queues(ar->hw);
523 dev_err(&ar->udev->dev, "restart device (%d)\n", r);
525 if (!WARN_ON(r == CARL9170_RR_NO_REASON) ||
526 !WARN_ON(r >= __CARL9170_RR_LAST))
532 if (!IS_ACCEPTING_CMD(ar) || ar->needs_full_reset)
533 ar->force_usb_reset = true;
535 ieee80211_queue_work(ar->hw, &ar->restart_work);
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.
544 static void carl9170_ping_work(struct work_struct *work)
546 struct ar9170 *ar = container_of(work, struct ar9170, ping_work);
552 mutex_lock(&ar->mutex);
553 err = carl9170_echo_test(ar, 0xdeadbeef);
555 carl9170_restart(ar, CARL9170_RR_UNRESPONSIVE_DEVICE);
556 mutex_unlock(&ar->mutex);
559 static int carl9170_init_interface(struct ar9170 *ar,
560 struct ieee80211_vif *vif)
562 struct ath_common *common = &ar->common;
566 WARN_ON_ONCE(IS_STARTED(ar));
570 memcpy(common->macaddr, vif->addr, ETH_ALEN);
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.
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.
582 ar->disable_offload |= ((vif->type != NL80211_IFTYPE_STATION) &&
583 (vif->type != NL80211_IFTYPE_AP));
585 /* The driver used to have P2P GO+CLIENT support,
586 * but since this was dropped and we don't know if
587 * there are any gremlins lurking in the shadows,
588 * so best we keep HW offload disabled for P2P.
590 ar->disable_offload |= vif->p2p;
592 ar->rx_software_decryption = ar->disable_offload;
594 err = carl9170_set_operating_mode(ar);
598 static int carl9170_op_add_interface(struct ieee80211_hw *hw,
599 struct ieee80211_vif *vif)
601 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
602 struct ieee80211_vif *main_vif, *old_main = NULL;
603 struct ar9170 *ar = hw->priv;
604 int vif_id = -1, err = 0;
606 mutex_lock(&ar->mutex);
608 if (vif_priv->active) {
610 * Skip the interface structure initialization,
611 * if the vif survived the _restart call.
613 vif_id = vif_priv->id;
614 vif_priv->enable_beacon = false;
616 spin_lock_bh(&ar->beacon_lock);
617 dev_kfree_skb_any(vif_priv->beacon);
618 vif_priv->beacon = NULL;
619 spin_unlock_bh(&ar->beacon_lock);
624 /* Because the AR9170 HW's MAC doesn't provide full support for
625 * multiple, independent interfaces [of different operation modes].
626 * We have to select ONE main interface [main mode of HW], but we
627 * can have multiple slaves [AKA: entry in the ACK-table].
629 * The first (from HEAD/TOP) interface in the ar->vif_list is
630 * always the main intf. All following intfs in this list
631 * are considered to be slave intfs.
633 main_vif = carl9170_get_main_vif(ar);
636 switch (main_vif->type) {
637 case NL80211_IFTYPE_STATION:
638 if (vif->type == NL80211_IFTYPE_STATION)
646 case NL80211_IFTYPE_MESH_POINT:
647 case NL80211_IFTYPE_AP:
648 if ((vif->type == NL80211_IFTYPE_STATION) ||
649 (vif->type == NL80211_IFTYPE_WDS) ||
650 (vif->type == NL80211_IFTYPE_AP) ||
651 (vif->type == NL80211_IFTYPE_MESH_POINT))
664 vif_id = bitmap_find_free_region(&ar->vif_bitmap, ar->fw.vif_num, 0);
673 BUG_ON(ar->vif_priv[vif_id].id != vif_id);
675 vif_priv->active = true;
676 vif_priv->id = vif_id;
677 vif_priv->enable_beacon = false;
680 /* We end up in here, if the main interface is being replaced.
681 * Put the new main interface at the HEAD of the list and the
682 * previous inteface will automatically become second in line.
684 list_add_rcu(&vif_priv->list, &ar->vif_list);
686 /* Add new inteface. If the list is empty, it will become the
687 * main inteface, otherwise it will be slave.
689 list_add_tail_rcu(&vif_priv->list, &ar->vif_list);
691 rcu_assign_pointer(ar->vif_priv[vif_id].vif, vif);
694 main_vif = carl9170_get_main_vif(ar);
696 if (main_vif == vif) {
697 rcu_assign_pointer(ar->beacon_iter, vif_priv);
701 struct carl9170_vif_info *old_main_priv =
702 (void *) old_main->drv_priv;
703 /* downgrade old main intf to slave intf.
704 * NOTE: We are no longer under rcu_read_lock.
705 * But we are still holding ar->mutex, so the
706 * vif data [id, addr] is safe.
708 err = carl9170_mod_virtual_mac(ar, old_main_priv->id,
714 err = carl9170_init_interface(ar, vif);
719 err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
725 if (ar->fw.tx_seq_table) {
726 err = carl9170_write_reg(ar, ar->fw.tx_seq_table + vif_id * 4,
733 if (err && (vif_id >= 0)) {
734 vif_priv->active = false;
735 bitmap_release_region(&ar->vif_bitmap, vif_id, 0);
737 RCU_INIT_POINTER(ar->vif_priv[vif_id].vif, NULL);
738 list_del_rcu(&vif_priv->list);
739 mutex_unlock(&ar->mutex);
743 ar->ps.off_override |= PS_OFF_VIF;
745 mutex_unlock(&ar->mutex);
751 static void carl9170_op_remove_interface(struct ieee80211_hw *hw,
752 struct ieee80211_vif *vif)
754 struct carl9170_vif_info *vif_priv = (void *) vif->drv_priv;
755 struct ieee80211_vif *main_vif;
756 struct ar9170 *ar = hw->priv;
759 mutex_lock(&ar->mutex);
761 if (WARN_ON_ONCE(!vif_priv->active))
767 main_vif = carl9170_get_main_vif(ar);
771 vif_priv->active = false;
772 WARN_ON(vif_priv->enable_beacon);
773 vif_priv->enable_beacon = false;
774 list_del_rcu(&vif_priv->list);
775 RCU_INIT_POINTER(ar->vif_priv[id].vif, NULL);
777 if (vif == main_vif) {
781 WARN_ON(carl9170_init_interface(ar,
782 carl9170_get_main_vif(ar)));
784 carl9170_set_operating_mode(ar);
789 WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));
792 carl9170_update_beacon(ar, false);
793 carl9170_flush_cab(ar, id);
795 spin_lock_bh(&ar->beacon_lock);
796 dev_kfree_skb_any(vif_priv->beacon);
797 vif_priv->beacon = NULL;
798 spin_unlock_bh(&ar->beacon_lock);
800 bitmap_release_region(&ar->vif_bitmap, id, 0);
802 carl9170_set_beacon_timers(ar);
805 ar->ps.off_override &= ~PS_OFF_VIF;
808 mutex_unlock(&ar->mutex);
813 void carl9170_ps_check(struct ar9170 *ar)
815 ieee80211_queue_work(ar->hw, &ar->ps_work);
818 /* caller must hold ar->mutex */
819 static int carl9170_ps_update(struct ar9170 *ar)
824 if (!ar->ps.off_override)
825 ps = (ar->hw->conf.flags & IEEE80211_CONF_PS);
827 if (ps != ar->ps.state) {
828 err = carl9170_powersave(ar, ps);
832 if (ar->ps.state && !ps) {
833 ar->ps.sleep_ms = jiffies_to_msecs(jiffies -
838 ar->ps.last_slept = jiffies;
840 ar->ps.last_action = jiffies;
847 static void carl9170_ps_work(struct work_struct *work)
849 struct ar9170 *ar = container_of(work, struct ar9170,
851 mutex_lock(&ar->mutex);
853 WARN_ON_ONCE(carl9170_ps_update(ar) != 0);
854 mutex_unlock(&ar->mutex);
857 static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
862 err = carl9170_get_noisefloor(ar);
867 if (ar->fw.hw_counters) {
868 err = carl9170_collect_tally(ar);
874 memset(&ar->tally, 0, sizeof(ar->tally));
879 static void carl9170_stat_work(struct work_struct *work)
881 struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
884 mutex_lock(&ar->mutex);
885 err = carl9170_update_survey(ar, false, true);
886 mutex_unlock(&ar->mutex);
891 ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
892 round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
895 static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
897 struct ar9170 *ar = hw->priv;
900 mutex_lock(&ar->mutex);
901 if (changed & IEEE80211_CONF_CHANGE_LISTEN_INTERVAL) {
906 if (changed & IEEE80211_CONF_CHANGE_PS) {
907 err = carl9170_ps_update(ar);
912 if (changed & IEEE80211_CONF_CHANGE_SMPS) {
917 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
918 enum nl80211_channel_type channel_type =
919 cfg80211_get_chandef_type(&hw->conf.chandef);
921 /* adjust slot time for 5 GHz */
922 err = carl9170_set_slot_time(ar);
926 err = carl9170_update_survey(ar, true, false);
930 err = carl9170_set_channel(ar, hw->conf.chandef.chan,
935 err = carl9170_update_survey(ar, false, true);
939 err = carl9170_set_dyn_sifs_ack(ar);
943 err = carl9170_set_rts_cts_rate(ar);
948 if (changed & IEEE80211_CONF_CHANGE_POWER) {
949 err = carl9170_set_mac_tpc(ar, ar->hw->conf.chandef.chan);
955 mutex_unlock(&ar->mutex);
959 static u64 carl9170_op_prepare_multicast(struct ieee80211_hw *hw,
960 struct netdev_hw_addr_list *mc_list)
962 struct netdev_hw_addr *ha;
965 /* always get broadcast frames */
966 mchash = 1ULL << (0xff >> 2);
968 netdev_hw_addr_list_for_each(ha, mc_list)
969 mchash |= 1ULL << (ha->addr[5] >> 2);
974 static void carl9170_op_configure_filter(struct ieee80211_hw *hw,
975 unsigned int changed_flags,
976 unsigned int *new_flags,
979 struct ar9170 *ar = hw->priv;
981 /* mask supported flags */
982 *new_flags &= FIF_ALLMULTI | ar->rx_filter_caps;
984 if (!IS_ACCEPTING_CMD(ar))
987 mutex_lock(&ar->mutex);
989 ar->filter_state = *new_flags;
991 * We can support more by setting the sniffer bit and
992 * then checking the error flags, later.
995 if (*new_flags & FIF_ALLMULTI)
998 if (multicast != ar->cur_mc_hash)
999 WARN_ON(carl9170_update_multicast(ar, multicast));
1001 if (changed_flags & FIF_OTHER_BSS) {
1002 ar->sniffer_enabled = !!(*new_flags & FIF_OTHER_BSS);
1004 WARN_ON(carl9170_set_operating_mode(ar));
1007 if (ar->fw.rx_filter && changed_flags & ar->rx_filter_caps) {
1010 if (!ar->fw.ba_filter)
1011 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1013 if (!(*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)))
1014 rx_filter |= CARL9170_RX_FILTER_BAD;
1016 if (!(*new_flags & FIF_CONTROL))
1017 rx_filter |= CARL9170_RX_FILTER_CTL_OTHER;
1019 if (!(*new_flags & FIF_PSPOLL))
1020 rx_filter |= CARL9170_RX_FILTER_CTL_PSPOLL;
1022 if (!(*new_flags & FIF_OTHER_BSS)) {
1023 rx_filter |= CARL9170_RX_FILTER_OTHER_RA;
1024 rx_filter |= CARL9170_RX_FILTER_DECRY_FAIL;
1027 WARN_ON(carl9170_rx_filter(ar, rx_filter));
1030 mutex_unlock(&ar->mutex);
1034 static void carl9170_op_bss_info_changed(struct ieee80211_hw *hw,
1035 struct ieee80211_vif *vif,
1036 struct ieee80211_bss_conf *bss_conf,
1039 struct ar9170 *ar = hw->priv;
1040 struct ath_common *common = &ar->common;
1042 struct carl9170_vif_info *vif_priv;
1043 struct ieee80211_vif *main_vif;
1045 mutex_lock(&ar->mutex);
1046 vif_priv = (void *) vif->drv_priv;
1047 main_vif = carl9170_get_main_vif(ar);
1048 if (WARN_ON(!main_vif))
1051 if (changed & BSS_CHANGED_BEACON_ENABLED) {
1052 struct carl9170_vif_info *iter;
1055 vif_priv->enable_beacon = bss_conf->enable_beacon;
1057 list_for_each_entry_rcu(iter, &ar->vif_list, list) {
1058 if (iter->active && iter->enable_beacon)
1064 ar->beacon_enabled = i;
1067 if (changed & BSS_CHANGED_BEACON) {
1068 err = carl9170_update_beacon(ar, false);
1073 if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON |
1074 BSS_CHANGED_BEACON_INT)) {
1076 if (main_vif != vif) {
1077 bss_conf->beacon_int = main_vif->bss_conf.beacon_int;
1078 bss_conf->dtim_period = main_vif->bss_conf.dtim_period;
1082 * Therefore a hard limit for the broadcast traffic should
1083 * prevent false alarms.
1085 if (vif->type != NL80211_IFTYPE_STATION &&
1086 (bss_conf->beacon_int * bss_conf->dtim_period >=
1087 (CARL9170_QUEUE_STUCK_TIMEOUT / 2))) {
1092 err = carl9170_set_beacon_timers(ar);
1097 if (changed & BSS_CHANGED_HT) {
1104 if (main_vif != vif)
1108 * The following settings can only be changed by the
1112 if (changed & BSS_CHANGED_BSSID) {
1113 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
1114 err = carl9170_set_operating_mode(ar);
1119 if (changed & BSS_CHANGED_ASSOC) {
1120 ar->common.curaid = bss_conf->aid;
1121 err = carl9170_set_beacon_timers(ar);
1126 if (changed & BSS_CHANGED_ERP_SLOT) {
1127 err = carl9170_set_slot_time(ar);
1132 if (changed & BSS_CHANGED_BASIC_RATES) {
1133 err = carl9170_set_mac_rates(ar);
1139 WARN_ON_ONCE(err && IS_STARTED(ar));
1140 mutex_unlock(&ar->mutex);
1143 static u64 carl9170_op_get_tsf(struct ieee80211_hw *hw,
1144 struct ieee80211_vif *vif)
1146 struct ar9170 *ar = hw->priv;
1147 struct carl9170_tsf_rsp tsf;
1150 mutex_lock(&ar->mutex);
1151 err = carl9170_exec_cmd(ar, CARL9170_CMD_READ_TSF,
1152 0, NULL, sizeof(tsf), &tsf);
1153 mutex_unlock(&ar->mutex);
1157 return le64_to_cpu(tsf.tsf_64);
1160 static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1161 struct ieee80211_vif *vif,
1162 struct ieee80211_sta *sta,
1163 struct ieee80211_key_conf *key)
1165 struct ar9170 *ar = hw->priv;
1169 if (ar->disable_offload || !vif)
1172 /* Fall back to software encryption whenever the driver is connected
1173 * to more than one network.
1175 * This is very unfortunate, because some machines cannot handle
1176 * the high througput speed in 802.11n networks.
1179 if (!is_main_vif(ar, vif)) {
1180 mutex_lock(&ar->mutex);
1185 * While the hardware supports *catch-all* key, for offloading
1186 * group-key en-/de-cryption. The way of how the hardware
1187 * decides which keyId maps to which key, remains a mystery...
1189 if ((vif->type != NL80211_IFTYPE_STATION &&
1190 vif->type != NL80211_IFTYPE_ADHOC) &&
1191 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1194 switch (key->cipher) {
1195 case WLAN_CIPHER_SUITE_WEP40:
1196 ktype = AR9170_ENC_ALG_WEP64;
1198 case WLAN_CIPHER_SUITE_WEP104:
1199 ktype = AR9170_ENC_ALG_WEP128;
1201 case WLAN_CIPHER_SUITE_TKIP:
1202 ktype = AR9170_ENC_ALG_TKIP;
1204 case WLAN_CIPHER_SUITE_CCMP:
1205 ktype = AR9170_ENC_ALG_AESCCMP;
1206 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
1212 mutex_lock(&ar->mutex);
1213 if (cmd == SET_KEY) {
1214 if (!IS_STARTED(ar)) {
1219 if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
1222 i = 64 + key->keyidx;
1224 for (i = 0; i < 64; i++)
1225 if (!(ar->usedkeys & BIT(i)))
1231 key->hw_key_idx = i;
1233 err = carl9170_upload_key(ar, i, sta ? sta->addr : NULL,
1235 min_t(u8, 16, key->keylen));
1239 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1240 err = carl9170_upload_key(ar, i, sta ? sta->addr :
1247 * hardware is not capable generating MMIC
1248 * of fragmented frames!
1250 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1254 ar->usedkeys |= BIT(i);
1256 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1258 if (!IS_STARTED(ar)) {
1259 /* The device is gone... together with the key ;-) */
1264 if (key->hw_key_idx < 64) {
1265 ar->usedkeys &= ~BIT(key->hw_key_idx);
1267 err = carl9170_upload_key(ar, key->hw_key_idx, NULL,
1268 AR9170_ENC_ALG_NONE, 0,
1273 if (key->cipher == WLAN_CIPHER_SUITE_TKIP) {
1274 err = carl9170_upload_key(ar, key->hw_key_idx,
1276 AR9170_ENC_ALG_NONE,
1284 err = carl9170_disable_key(ar, key->hw_key_idx);
1290 mutex_unlock(&ar->mutex);
1294 if (!ar->rx_software_decryption) {
1295 ar->rx_software_decryption = true;
1296 carl9170_set_operating_mode(ar);
1298 mutex_unlock(&ar->mutex);
1302 static int carl9170_op_sta_add(struct ieee80211_hw *hw,
1303 struct ieee80211_vif *vif,
1304 struct ieee80211_sta *sta)
1306 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1309 atomic_set(&sta_info->pending_frames, 0);
1311 if (sta->ht_cap.ht_supported) {
1312 if (sta->ht_cap.ampdu_density > 6) {
1314 * HW does support 16us AMPDU density.
1315 * No HT-Xmit for station.
1321 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++)
1322 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1324 sta_info->ampdu_max_len = 1 << (3 + sta->ht_cap.ampdu_factor);
1325 sta_info->ht_sta = true;
1331 static int carl9170_op_sta_remove(struct ieee80211_hw *hw,
1332 struct ieee80211_vif *vif,
1333 struct ieee80211_sta *sta)
1335 struct ar9170 *ar = hw->priv;
1336 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1338 bool cleanup = false;
1340 if (sta->ht_cap.ht_supported) {
1342 sta_info->ht_sta = false;
1345 for (i = 0; i < ARRAY_SIZE(sta_info->agg); i++) {
1346 struct carl9170_sta_tid *tid_info;
1348 tid_info = rcu_dereference(sta_info->agg[i]);
1349 RCU_INIT_POINTER(sta_info->agg[i], NULL);
1354 spin_lock_bh(&ar->tx_ampdu_list_lock);
1355 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1356 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1357 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1363 carl9170_ampdu_gc(ar);
1369 static int carl9170_op_conf_tx(struct ieee80211_hw *hw,
1370 struct ieee80211_vif *vif, u16 queue,
1371 const struct ieee80211_tx_queue_params *param)
1373 struct ar9170 *ar = hw->priv;
1376 mutex_lock(&ar->mutex);
1377 if (queue < ar->hw->queues) {
1378 memcpy(&ar->edcf[ar9170_qmap[queue]], param, sizeof(*param));
1379 ret = carl9170_set_qos(ar);
1384 mutex_unlock(&ar->mutex);
1388 static void carl9170_ampdu_work(struct work_struct *work)
1390 struct ar9170 *ar = container_of(work, struct ar9170,
1393 if (!IS_STARTED(ar))
1396 mutex_lock(&ar->mutex);
1397 carl9170_ampdu_gc(ar);
1398 mutex_unlock(&ar->mutex);
1401 static int carl9170_op_ampdu_action(struct ieee80211_hw *hw,
1402 struct ieee80211_vif *vif,
1403 struct ieee80211_ampdu_params *params)
1405 struct ieee80211_sta *sta = params->sta;
1406 enum ieee80211_ampdu_mlme_action action = params->action;
1407 u16 tid = params->tid;
1408 u16 *ssn = ¶ms->ssn;
1409 struct ar9170 *ar = hw->priv;
1410 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1411 struct carl9170_sta_tid *tid_info;
1417 case IEEE80211_AMPDU_TX_START:
1418 if (!sta_info->ht_sta)
1421 tid_info = kzalloc(sizeof(struct carl9170_sta_tid),
1426 tid_info->hsn = tid_info->bsn = tid_info->snx = (*ssn);
1427 tid_info->state = CARL9170_TID_STATE_PROGRESS;
1428 tid_info->tid = tid;
1429 tid_info->max = sta_info->ampdu_max_len;
1430 tid_info->sta = sta;
1431 tid_info->vif = vif;
1433 INIT_LIST_HEAD(&tid_info->list);
1434 INIT_LIST_HEAD(&tid_info->tmp_list);
1435 skb_queue_head_init(&tid_info->queue);
1436 spin_lock_init(&tid_info->lock);
1438 spin_lock_bh(&ar->tx_ampdu_list_lock);
1439 ar->tx_ampdu_list_len++;
1440 list_add_tail_rcu(&tid_info->list, &ar->tx_ampdu_list);
1441 rcu_assign_pointer(sta_info->agg[tid], tid_info);
1442 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1444 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1447 case IEEE80211_AMPDU_TX_STOP_CONT:
1448 case IEEE80211_AMPDU_TX_STOP_FLUSH:
1449 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1451 tid_info = rcu_dereference(sta_info->agg[tid]);
1453 spin_lock_bh(&ar->tx_ampdu_list_lock);
1454 if (tid_info->state > CARL9170_TID_STATE_SHUTDOWN)
1455 tid_info->state = CARL9170_TID_STATE_SHUTDOWN;
1456 spin_unlock_bh(&ar->tx_ampdu_list_lock);
1459 RCU_INIT_POINTER(sta_info->agg[tid], NULL);
1462 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1463 ieee80211_queue_work(ar->hw, &ar->ampdu_work);
1466 case IEEE80211_AMPDU_TX_OPERATIONAL:
1468 tid_info = rcu_dereference(sta_info->agg[tid]);
1470 sta_info->stats[tid].clear = true;
1471 sta_info->stats[tid].req = false;
1474 bitmap_zero(tid_info->bitmap, CARL9170_BAW_SIZE);
1475 tid_info->state = CARL9170_TID_STATE_IDLE;
1479 if (WARN_ON_ONCE(!tid_info))
1484 case IEEE80211_AMPDU_RX_START:
1485 case IEEE80211_AMPDU_RX_STOP:
1486 /* Handled by hardware */
1496 #ifdef CONFIG_CARL9170_WPC
1497 static int carl9170_register_wps_button(struct ar9170 *ar)
1499 struct input_dev *input;
1502 if (!(ar->features & CARL9170_WPS_BUTTON))
1505 input = input_allocate_device();
1509 snprintf(ar->wps.name, sizeof(ar->wps.name), "%s WPS Button",
1510 wiphy_name(ar->hw->wiphy));
1512 snprintf(ar->wps.phys, sizeof(ar->wps.phys),
1513 "ieee80211/%s/input0", wiphy_name(ar->hw->wiphy));
1515 input->name = ar->wps.name;
1516 input->phys = ar->wps.phys;
1517 input->id.bustype = BUS_USB;
1518 input->dev.parent = &ar->hw->wiphy->dev;
1520 input_set_capability(input, EV_KEY, KEY_WPS_BUTTON);
1522 err = input_register_device(input);
1524 input_free_device(input);
1528 ar->wps.pbc = input;
1531 #endif /* CONFIG_CARL9170_WPC */
1533 #ifdef CONFIG_CARL9170_HWRNG
1534 static int carl9170_rng_get(struct ar9170 *ar)
1537 #define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
1538 #define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
1540 static const __le32 rng_load[RW] = {
1541 [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)};
1545 unsigned int i, off = 0, transfer, count;
1548 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
1550 if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized)
1553 count = ARRAY_SIZE(ar->rng.cache);
1555 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1556 RB, (u8 *) rng_load,
1561 transfer = min_t(unsigned int, count, RW);
1562 for (i = 0; i < transfer; i++)
1563 ar->rng.cache[off + i] = buf[i];
1569 ar->rng.cache_idx = 0;
1576 static int carl9170_rng_read(struct hwrng *rng, u32 *data)
1578 struct ar9170 *ar = (struct ar9170 *)rng->priv;
1581 mutex_lock(&ar->mutex);
1582 if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) {
1583 ret = carl9170_rng_get(ar);
1585 mutex_unlock(&ar->mutex);
1590 *data = ar->rng.cache[ar->rng.cache_idx++];
1591 mutex_unlock(&ar->mutex);
1596 static void carl9170_unregister_hwrng(struct ar9170 *ar)
1598 if (ar->rng.initialized) {
1599 hwrng_unregister(&ar->rng.rng);
1600 ar->rng.initialized = false;
1604 static int carl9170_register_hwrng(struct ar9170 *ar)
1608 snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name),
1609 "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy));
1610 ar->rng.rng.name = ar->rng.name;
1611 ar->rng.rng.data_read = carl9170_rng_read;
1612 ar->rng.rng.priv = (unsigned long)ar;
1614 if (WARN_ON(ar->rng.initialized))
1617 err = hwrng_register(&ar->rng.rng);
1619 dev_err(&ar->udev->dev, "Failed to register the random "
1620 "number generator (%d)\n", err);
1624 ar->rng.initialized = true;
1626 err = carl9170_rng_get(ar);
1628 carl9170_unregister_hwrng(ar);
1634 #endif /* CONFIG_CARL9170_HWRNG */
1636 static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
1637 struct survey_info *survey)
1639 struct ar9170 *ar = hw->priv;
1640 struct ieee80211_channel *chan;
1641 struct ieee80211_supported_band *band;
1648 if (idx == chan->hw_value) {
1649 mutex_lock(&ar->mutex);
1650 err = carl9170_update_survey(ar, false, true);
1651 mutex_unlock(&ar->mutex);
1656 for (b = 0; b < NUM_NL80211_BANDS; b++) {
1657 band = ar->hw->wiphy->bands[b];
1662 for (i = 0; i < band->n_channels; i++) {
1663 if (band->channels[i].hw_value == idx) {
1664 chan = &band->channels[i];
1672 memcpy(survey, &ar->survey[idx], sizeof(*survey));
1674 survey->channel = chan;
1675 survey->filled = SURVEY_INFO_NOISE_DBM;
1677 if (ar->channel == chan)
1678 survey->filled |= SURVEY_INFO_IN_USE;
1680 if (ar->fw.hw_counters) {
1681 survey->filled |= SURVEY_INFO_TIME |
1682 SURVEY_INFO_TIME_BUSY |
1683 SURVEY_INFO_TIME_TX;
1689 static void carl9170_op_flush(struct ieee80211_hw *hw,
1690 struct ieee80211_vif *vif,
1691 u32 queues, bool drop)
1693 struct ar9170 *ar = hw->priv;
1696 mutex_lock(&ar->mutex);
1697 for_each_set_bit(vid, &ar->vif_bitmap, ar->fw.vif_num)
1698 carl9170_flush_cab(ar, vid);
1700 carl9170_flush(ar, drop);
1701 mutex_unlock(&ar->mutex);
1704 static int carl9170_op_get_stats(struct ieee80211_hw *hw,
1705 struct ieee80211_low_level_stats *stats)
1707 struct ar9170 *ar = hw->priv;
1709 memset(stats, 0, sizeof(*stats));
1710 stats->dot11ACKFailureCount = ar->tx_ack_failures;
1711 stats->dot11FCSErrorCount = ar->tx_fcs_errors;
1715 static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
1716 struct ieee80211_vif *vif,
1717 enum sta_notify_cmd cmd,
1718 struct ieee80211_sta *sta)
1720 struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
1723 case STA_NOTIFY_SLEEP:
1724 sta_info->sleeping = true;
1725 if (atomic_read(&sta_info->pending_frames))
1726 ieee80211_sta_block_awake(hw, sta, true);
1729 case STA_NOTIFY_AWAKE:
1730 sta_info->sleeping = false;
1735 static bool carl9170_tx_frames_pending(struct ieee80211_hw *hw)
1737 struct ar9170 *ar = hw->priv;
1739 return !!atomic_read(&ar->tx_total_queued);
1742 static const struct ieee80211_ops carl9170_ops = {
1743 .start = carl9170_op_start,
1744 .stop = carl9170_op_stop,
1745 .tx = carl9170_op_tx,
1746 .flush = carl9170_op_flush,
1747 .add_interface = carl9170_op_add_interface,
1748 .remove_interface = carl9170_op_remove_interface,
1749 .config = carl9170_op_config,
1750 .prepare_multicast = carl9170_op_prepare_multicast,
1751 .configure_filter = carl9170_op_configure_filter,
1752 .conf_tx = carl9170_op_conf_tx,
1753 .bss_info_changed = carl9170_op_bss_info_changed,
1754 .get_tsf = carl9170_op_get_tsf,
1755 .set_key = carl9170_op_set_key,
1756 .sta_add = carl9170_op_sta_add,
1757 .sta_remove = carl9170_op_sta_remove,
1758 .sta_notify = carl9170_op_sta_notify,
1759 .get_survey = carl9170_op_get_survey,
1760 .get_stats = carl9170_op_get_stats,
1761 .ampdu_action = carl9170_op_ampdu_action,
1762 .tx_frames_pending = carl9170_tx_frames_pending,
1765 void *carl9170_alloc(size_t priv_size)
1767 struct ieee80211_hw *hw;
1769 struct sk_buff *skb;
1773 * this buffer is used for rx stream reconstruction.
1774 * Under heavy load this device (or the transport layer?)
1775 * tends to split the streams into separate rx descriptors.
1778 skb = __dev_alloc_skb(AR9170_RX_STREAM_MAX_SIZE, GFP_KERNEL);
1782 hw = ieee80211_alloc_hw(priv_size, &carl9170_ops);
1788 ar->rx_failover = skb;
1790 memset(&ar->rx_plcp, 0, sizeof(struct ar9170_rx_head));
1791 ar->rx_has_plcp = false;
1794 * Here's a hidden pitfall!
1796 * All 4 AC queues work perfectly well under _legacy_ operation.
1797 * However as soon as aggregation is enabled, the traffic flow
1798 * gets very bumpy. Therefore we have to _switch_ to a
1799 * software AC with a single HW queue.
1801 hw->queues = __AR9170_NUM_TXQ;
1803 mutex_init(&ar->mutex);
1804 spin_lock_init(&ar->beacon_lock);
1805 spin_lock_init(&ar->cmd_lock);
1806 spin_lock_init(&ar->tx_stats_lock);
1807 spin_lock_init(&ar->tx_ampdu_list_lock);
1808 spin_lock_init(&ar->mem_lock);
1809 spin_lock_init(&ar->state_lock);
1810 atomic_set(&ar->pending_restarts, 0);
1812 for (i = 0; i < ar->hw->queues; i++) {
1813 skb_queue_head_init(&ar->tx_status[i]);
1814 skb_queue_head_init(&ar->tx_pending[i]);
1816 INIT_LIST_HEAD(&ar->bar_list[i]);
1817 spin_lock_init(&ar->bar_list_lock[i]);
1819 INIT_WORK(&ar->ps_work, carl9170_ps_work);
1820 INIT_WORK(&ar->ping_work, carl9170_ping_work);
1821 INIT_WORK(&ar->restart_work, carl9170_restart_work);
1822 INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
1823 INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
1824 INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
1825 INIT_LIST_HEAD(&ar->tx_ampdu_list);
1826 rcu_assign_pointer(ar->tx_ampdu_iter,
1827 (struct carl9170_sta_tid *) &ar->tx_ampdu_list);
1829 bitmap_zero(&ar->vif_bitmap, ar->fw.vif_num);
1830 INIT_LIST_HEAD(&ar->vif_list);
1831 init_completion(&ar->tx_flush);
1833 /* firmware decides which modes we support */
1834 hw->wiphy->interface_modes = 0;
1836 ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1837 ieee80211_hw_set(hw, MFP_CAPABLE);
1838 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
1839 ieee80211_hw_set(hw, SUPPORTS_PS);
1840 ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
1841 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
1842 ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
1843 ieee80211_hw_set(hw, SIGNAL_DBM);
1844 ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES);
1846 if (!modparam_noht) {
1848 * see the comment above, why we allow the user
1849 * to disable HT by a module parameter.
1851 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
1854 hw->extra_tx_headroom = sizeof(struct _carl9170_tx_superframe);
1855 hw->sta_data_size = sizeof(struct carl9170_sta_info);
1856 hw->vif_data_size = sizeof(struct carl9170_vif_info);
1858 hw->max_rates = CARL9170_TX_MAX_RATES;
1859 hw->max_rate_tries = CARL9170_TX_USER_RATE_TRIES;
1861 for (i = 0; i < ARRAY_SIZE(ar->noise); i++)
1862 ar->noise[i] = -95; /* ATH_DEFAULT_NOISE_FLOOR */
1868 return ERR_PTR(-ENOMEM);
1871 static int carl9170_read_eeprom(struct ar9170 *ar)
1873 #define RW 8 /* number of words to read at once */
1874 #define RB (sizeof(u32) * RW)
1875 u8 *eeprom = (void *)&ar->eeprom;
1879 BUILD_BUG_ON(sizeof(ar->eeprom) & 3);
1881 BUILD_BUG_ON(RB > CARL9170_MAX_CMD_LEN - 4);
1883 /* don't want to handle trailing remains */
1884 BUILD_BUG_ON(sizeof(ar->eeprom) % RB);
1887 for (i = 0; i < sizeof(ar->eeprom) / RB; i++) {
1888 for (j = 0; j < RW; j++)
1889 offsets[j] = cpu_to_le32(AR9170_EEPROM_START +
1892 err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
1893 RB, (u8 *) &offsets,
1894 RB, eeprom + RB * i);
1904 static int carl9170_parse_eeprom(struct ar9170 *ar)
1906 struct ath_regulatory *regulatory = &ar->common.regulatory;
1907 unsigned int rx_streams, tx_streams, tx_params = 0;
1911 if (ar->eeprom.length == cpu_to_le16(0xffff))
1914 rx_streams = hweight8(ar->eeprom.rx_mask);
1915 tx_streams = hweight8(ar->eeprom.tx_mask);
1917 if (rx_streams != tx_streams) {
1918 tx_params = IEEE80211_HT_MCS_TX_RX_DIFF;
1920 WARN_ON(!(tx_streams >= 1 && tx_streams <=
1921 IEEE80211_HT_MCS_TX_MAX_STREAMS));
1923 tx_params = (tx_streams - 1) <<
1924 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1926 carl9170_band_2GHz.ht_cap.mcs.tx_params |= tx_params;
1927 carl9170_band_5GHz.ht_cap.mcs.tx_params |= tx_params;
1930 if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
1931 ar->hw->wiphy->bands[NL80211_BAND_2GHZ] =
1932 &carl9170_band_2GHz;
1933 chans += carl9170_band_2GHz.n_channels;
1936 if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
1937 ar->hw->wiphy->bands[NL80211_BAND_5GHZ] =
1938 &carl9170_band_5GHz;
1939 chans += carl9170_band_5GHz.n_channels;
1946 ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL);
1949 ar->num_channels = chans;
1951 regulatory->current_rd = le16_to_cpu(ar->eeprom.reg_domain[0]);
1953 /* second part of wiphy init */
1954 SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
1959 static void carl9170_reg_notifier(struct wiphy *wiphy,
1960 struct regulatory_request *request)
1962 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1963 struct ar9170 *ar = hw->priv;
1965 ath_reg_notifier_apply(wiphy, request, &ar->common.regulatory);
1968 int carl9170_register(struct ar9170 *ar)
1970 struct ath_regulatory *regulatory = &ar->common.regulatory;
1973 if (WARN_ON(ar->mem_bitmap))
1976 ar->mem_bitmap = kzalloc(roundup(ar->fw.mem_blocks, BITS_PER_LONG) *
1977 sizeof(unsigned long), GFP_KERNEL);
1979 if (!ar->mem_bitmap)
1982 /* try to read EEPROM, init MAC addr */
1983 err = carl9170_read_eeprom(ar);
1987 err = carl9170_parse_eeprom(ar);
1991 err = ath_regd_init(regulatory, ar->hw->wiphy,
1992 carl9170_reg_notifier);
1996 if (modparam_noht) {
1997 carl9170_band_2GHz.ht_cap.ht_supported = false;
1998 carl9170_band_5GHz.ht_cap.ht_supported = false;
2001 for (i = 0; i < ar->fw.vif_num; i++) {
2002 ar->vif_priv[i].id = i;
2003 ar->vif_priv[i].vif = NULL;
2006 err = ieee80211_register_hw(ar->hw);
2010 /* mac80211 interface is now registered */
2011 ar->registered = true;
2013 if (!ath_is_world_regd(regulatory))
2014 regulatory_hint(ar->hw->wiphy, regulatory->alpha2);
2016 #ifdef CONFIG_CARL9170_DEBUGFS
2017 carl9170_debugfs_register(ar);
2018 #endif /* CONFIG_CARL9170_DEBUGFS */
2020 err = carl9170_led_init(ar);
2024 #ifdef CONFIG_CARL9170_LEDS
2025 err = carl9170_led_register(ar);
2028 #endif /* CONFIG_CARL9170_LEDS */
2030 #ifdef CONFIG_CARL9170_WPC
2031 err = carl9170_register_wps_button(ar);
2034 #endif /* CONFIG_CARL9170_WPC */
2036 #ifdef CONFIG_CARL9170_HWRNG
2037 err = carl9170_register_hwrng(ar);
2040 #endif /* CONFIG_CARL9170_HWRNG */
2042 dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
2043 wiphy_name(ar->hw->wiphy));
2048 carl9170_unregister(ar);
2052 void carl9170_unregister(struct ar9170 *ar)
2054 if (!ar->registered)
2057 ar->registered = false;
2059 #ifdef CONFIG_CARL9170_LEDS
2060 carl9170_led_unregister(ar);
2061 #endif /* CONFIG_CARL9170_LEDS */
2063 #ifdef CONFIG_CARL9170_DEBUGFS
2064 carl9170_debugfs_unregister(ar);
2065 #endif /* CONFIG_CARL9170_DEBUGFS */
2067 #ifdef CONFIG_CARL9170_WPC
2069 input_unregister_device(ar->wps.pbc);
2072 #endif /* CONFIG_CARL9170_WPC */
2074 #ifdef CONFIG_CARL9170_HWRNG
2075 carl9170_unregister_hwrng(ar);
2076 #endif /* CONFIG_CARL9170_HWRNG */
2078 carl9170_cancel_worker(ar);
2079 cancel_work_sync(&ar->restart_work);
2081 ieee80211_unregister_hw(ar->hw);
2084 void carl9170_free(struct ar9170 *ar)
2086 WARN_ON(ar->registered);
2087 WARN_ON(IS_INITIALIZED(ar));
2089 kfree_skb(ar->rx_failover);
2090 ar->rx_failover = NULL;
2092 kfree(ar->mem_bitmap);
2093 ar->mem_bitmap = NULL;
2098 mutex_destroy(&ar->mutex);
2100 ieee80211_free_hw(ar->hw);